File: [local] / src / usr.bin / make / job.c (download)
Revision 1.29, Sat Jun 17 14:38:15 2000 UTC (23 years, 11 months ago) by espie
Branch: MAIN
Changes since 1.28: +46 -47 lines
This patch introduces a distinction between
Lst_Init (constructor) and Lst_New (allocation + construction)
Lst_Destroy (destructor) and Lst_Delete (deallocation + destruction),
and uses that to turn most dynamic allocation of lists (Lst pointers)
into static structures (LIST).
Most of this is mundane, except for allGNs in targ.c, where the code must
be checked to verify that Targ_Init is called soon enough.
Lst_New is a temporary addition. All lists will soon be static.
Reviewed by millert@, like the previous patch.
|
/* $OpenBSD: job.c,v 1.29 2000/06/17 14:38:15 espie Exp $ */
/* $NetBSD: job.c,v 1.16 1996/11/06 17:59:08 christos Exp $ */
/*
* Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
* Copyright (c) 1988, 1989 by Adam de Boor
* Copyright (c) 1989 by Berkeley Softworks
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Adam de Boor.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
#if 0
static char sccsid[] = "@(#)job.c 8.2 (Berkeley) 3/19/94";
#else
static char rcsid[] = "$OpenBSD: job.c,v 1.29 2000/06/17 14:38:15 espie Exp $";
#endif
#endif /* not lint */
/*-
* job.c --
* handle the creation etc. of our child processes.
*
* Interface:
* Job_Make Start the creation of the given target.
*
* Job_CatchChildren Check for and handle the termination of any
* children. This must be called reasonably
* frequently to keep the whole make going at
* a decent clip, since job table entries aren't
* removed until their process is caught this way.
* Its single argument is TRUE if the function
* should block waiting for a child to terminate.
*
* Job_CatchOutput Print any output our children have produced.
* Should also be called fairly frequently to
* keep the user informed of what's going on.
* If no output is waiting, it will block for
* a time given by the SEL_* constants, below,
* or until output is ready.
*
* Job_Init Called to intialize this module. in addition,
* any commands attached to the .BEGIN target
* are executed before this function returns.
* Hence, the makefile must have been parsed
* before this function is called.
*
* Job_End Cleanup any memory used.
*
* Job_Full Return TRUE if the job table is filled.
*
* Job_Empty Return TRUE if the job table is completely
* empty.
*
* Job_ParseShell Given the line following a .SHELL target, parse
* the line as a shell specification. Returns
* FAILURE if the spec was incorrect.
*
* Job_Finish Perform any final processing which needs doing.
* This includes the execution of any commands
* which have been/were attached to the .END
* target. It should only be called when the
* job table is empty.
*
* Job_AbortAll Abort all currently running jobs. It doesn't
* handle output or do anything for the jobs,
* just kills them. It should only be called in
* an emergency, as it were.
*
* Job_CheckCommands Verify that the commands for a target are
* ok. Provide them if necessary and possible.
*
* Job_Touch Update a target without really updating it.
*
* Job_Wait Wait for all currently-running jobs to finish.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <errno.h>
#include <utime.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include "make.h"
#include "hash.h"
#include "dir.h"
#include "job.h"
#include "pathnames.h"
#ifdef REMOTE
#include "rmt.h"
# define STATIC
#else
# define STATIC static
#endif
/*
* error handling variables
*/
static int errors = 0; /* number of errors reported */
static int aborting = 0; /* why is the make aborting? */
#define ABORT_ERROR 1 /* Because of an error */
#define ABORT_INTERRUPT 2 /* Because it was interrupted */
#define ABORT_WAIT 3 /* Waiting for jobs to finish */
/*
* XXX: Avoid SunOS bug... FILENO() is fp->_file, and file
* is a char! So when we go above 127 we turn negative!
*/
#define FILENO(a) ((unsigned) fileno(a))
/*
* post-make command processing. The node postCommands is really just the
* .END target but we keep it around to avoid having to search for it
* all the time.
*/
static GNode *postCommands; /* node containing commands to execute when
* everything else is done */
static int numCommands; /* The number of commands actually printed
* for a target. Should this number be
* 0, no shell will be executed. */
/*
* Return values from JobStart.
*/
#define JOB_RUNNING 0 /* Job is running */
#define JOB_ERROR 1 /* Error in starting the job */
#define JOB_FINISHED 2 /* The job is already finished */
#define JOB_STOPPED 3 /* The job is stopped */
/*
* tfile is used to build temp file names to store shell commands to
* execute.
*/
static char tfile[sizeof(TMPPAT)];
/*
* Descriptions for various shells.
*/
static Shell shells[] = {
/*
* CSH description. The csh can do echo control by playing
* with the setting of the 'echo' shell variable. Sadly,
* however, it is unable to do error control nicely.
*/
{
"csh",
TRUE, "unset verbose", "set verbose", "unset verbose", 10,
FALSE, "echo \"%s\"\n", "csh -c \"%s || exit 0\"",
"v", "e",
},
/*
* SH description. Echo control is also possible and, under
* sun UNIX anyway, one can even control error checking.
*/
{
"sh",
TRUE, "set -", "set -v", "set -", 5,
TRUE, "set -e", "set +e",
#ifdef OLDBOURNESHELL
FALSE, "echo \"%s\"\n", "sh -c '%s || exit 0'\n",
#endif
"v", "e",
},
/*
* UNKNOWN.
*/
{
(char *) 0,
FALSE, (char *) 0, (char *) 0, (char *) 0, 0,
FALSE, (char *) 0, (char *) 0,
(char *) 0, (char *) 0,
}
};
static Shell *commandShell = &shells[DEFSHELL];/* this is the shell to
* which we pass all
* commands in the Makefile.
* It is set by the
* Job_ParseShell function */
static char *shellPath = NULL, /* full pathname of
* executable image */
*shellName = NULL, /* last component of shell */
*shellArgv = NULL; /* Custom shell args */
static int maxJobs; /* The most children we can run at once */
static int maxLocal; /* The most local ones we can have */
STATIC int nJobs; /* The number of children currently running */
STATIC int nLocal; /* The number of local children */
STATIC LIST jobs; /* The structures that describe them */
STATIC Boolean jobFull; /* Flag to tell when the job table is full. It
* is set TRUE when (1) the total number of
* running jobs equals the maximum allowed or
* (2) a job can only be run locally, but
* nLocal equals maxLocal */
#ifndef RMT_WILL_WATCH
static fd_set *outputsp; /* Set of descriptors of pipes connected to
* the output channels of children */
static int outputsn;
#endif
STATIC GNode *lastNode; /* The node for which output was most recently
* produced. */
STATIC char *targFmt; /* Format string to use to head output from a
* job when it's not the most-recent job heard
* from */
#ifdef REMOTE
# define TARG_FMT "--- %s at %s ---\n" /* Default format */
# define MESSAGE(fp, gn) \
(void) fprintf(fp, targFmt, gn->name, gn->rem.hname);
#else
# define TARG_FMT "--- %s ---\n" /* Default format */
# define MESSAGE(fp, gn) \
(void) fprintf(fp, targFmt, gn->name);
#endif
/*
* When JobStart attempts to run a job remotely but can't, and isn't allowed
* to run the job locally, or when Job_CatchChildren detects a job that has
* been migrated home, the job is placed on the stoppedJobs queue to be run
* when the next job finishes.
*/
STATIC LIST stoppedJobs; /* Lst of Job structures describing
* jobs that were stopped due to concurrency
* limits or migration home */
#if defined(USE_PGRP) && defined(SYSV)
# define KILL(pid, sig) killpg(-(pid), (sig))
#else
# if defined(USE_PGRP)
# define KILL(pid, sig) killpg((pid), (sig))
# else
# define KILL(pid, sig) kill((pid), (sig))
# endif
#endif
/*
* Grmpf... There is no way to set bits of the wait structure
* anymore with the stupid W*() macros. I liked the union wait
* stuff much more. So, we devise our own macros... This is
* really ugly, use dramamine sparingly. You have been warned.
*/
#define W_SETMASKED(st, val, fun) \
{ \
int sh = (int) ~0; \
int mask = fun(sh); \
\
for (sh = 0; ((mask >> sh) & 1) == 0; sh++) \
continue; \
*(st) = (*(st) & ~mask) | ((val) << sh); \
}
#define W_SETTERMSIG(st, val) W_SETMASKED(st, val, WTERMSIG)
#define W_SETEXITSTATUS(st, val) W_SETMASKED(st, val, WEXITSTATUS)
static void JobCondPassSig __P((void *, void *));
static void JobPassSig __P((int));
static int JobCmpPid __P((void *, void *));
static int JobPrintCommand __P((void *, void *));
static void JobSaveCommand __P((void *, void *));
static void JobClose __P((Job *));
#ifdef REMOTE
static int JobCmpRmtID __P((Job *, void *));
# ifdef RMT_WILL_WATCH
static void JobLocalInput __P((int, Job *));
# endif
#else
static void JobFinish __P((Job *, int *));
static void JobExec __P((Job *, char **));
#endif
static void JobMakeArgv __P((Job *, char **));
static void JobRestart __P((Job *));
static int JobStart __P((GNode *, int, Job *));
static char *JobOutput __P((Job *, char *, char *, int));
static void JobDoOutput __P((Job *, Boolean));
static Shell *JobMatchShell __P((char *));
static void JobInterrupt __P((int, int));
static void JobRestartJobs __P((void));
/*-
*-----------------------------------------------------------------------
* JobCondPassSig --
* Pass a signal to a job if the job is remote or if USE_PGRP
* is defined.
*
* Side Effects:
* None, except the job may bite it.
*
*-----------------------------------------------------------------------
*/
static void
JobCondPassSig(jobp, signop)
void *jobp; /* Job to biff */
void *signop; /* Signal to send it */
{
Job *job = (Job *) jobp;
int signo = *(int *) signop;
#ifdef RMT_WANTS_SIGNALS
if (job->flags & JOB_REMOTE) {
(void) Rmt_Signal(job, signo);
} else {
KILL(job->pid, signo);
}
#else
/*
* Assume that sending the signal to job->pid will signal any remote
* job as well.
*/
if (DEBUG(JOB)) {
(void) fprintf(stdout,
"JobCondPassSig passing signal %d to child %d.\n",
signo, job->pid);
(void) fflush(stdout);
}
KILL(job->pid, signo);
#endif
}
/*-
*-----------------------------------------------------------------------
* JobPassSig --
* Pass a signal on to all remote jobs and to all local jobs if
* USE_PGRP is defined, then die ourselves.
*
* Results:
* None.
*
* Side Effects:
* We die by the same signal.
*
*-----------------------------------------------------------------------
*/
static void
JobPassSig(signo)
int signo; /* The signal number we've received */
{
sigset_t nmask, omask;
struct sigaction act;
if (DEBUG(JOB)) {
(void) fprintf(stdout, "JobPassSig(%d) called.\n", signo);
(void) fflush(stdout);
}
Lst_ForEach(&jobs, JobCondPassSig, &signo);
/*
* Deal with proper cleanup based on the signal received. We only run
* the .INTERRUPT target if the signal was in fact an interrupt. The other
* three termination signals are more of a "get out *now*" command.
*/
if (signo == SIGINT) {
JobInterrupt(TRUE, signo);
} else if ((signo == SIGHUP) || (signo == SIGTERM) || (signo == SIGQUIT)) {
JobInterrupt(FALSE, signo);
}
/*
* Leave gracefully if SIGQUIT, rather than core dumping.
*/
if (signo == SIGQUIT) {
Finish(0);
}
/*
* Send ourselves the signal now we've given the message to everyone else.
* Note we block everything else possible while we're getting the signal.
* This ensures that all our jobs get continued when we wake up before
* we take any other signal.
*/
sigemptyset(&nmask);
sigaddset(&nmask, signo);
sigprocmask(SIG_SETMASK, &nmask, &omask);
memset(&act, 0, sizeof act);
act.sa_handler = SIG_DFL;
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
sigaction(signo, &act, NULL);
if (DEBUG(JOB)) {
(void) fprintf(stdout,
"JobPassSig passing signal to self, mask = %x.\n",
~0 & ~(1 << (signo-1)));
(void) fflush(stdout);
}
(void) signal(signo, SIG_DFL);
(void) KILL(getpid(), signo);
signo = SIGCONT;
Lst_ForEach(&jobs, JobCondPassSig, &signo);
(void) sigprocmask(SIG_SETMASK, &omask, NULL);
sigprocmask(SIG_SETMASK, &omask, NULL);
act.sa_handler = JobPassSig;
sigaction(signo, &act, NULL);
}
/*-
*-----------------------------------------------------------------------
* JobCmpPid --
* Compare the pid of the job with the given pid and return 0 if they
* are equal. This function is called from Job_CatchChildren via
* Lst_Find to find the job descriptor of the finished job.
*
* Results:
* 0 if the pid's match
*
* Side Effects:
* None
*-----------------------------------------------------------------------
*/
static int
JobCmpPid(job, pid)
void *job; /* job to examine */
void *pid; /* process id desired */
{
return *(int *)pid - ((Job *)job)->pid;
}
#ifdef REMOTE
/*-
*-----------------------------------------------------------------------
* JobCmpRmtID --
* Compare the rmtID of the job with the given rmtID and return 0 if they
* are equal.
*
* Results:
* 0 if the rmtID's match
*
* Side Effects:
* None.
*-----------------------------------------------------------------------
*/
static int
JobCmpRmtID(job, rmtID)
void *job; /* job to examine */
void *rmtID; /* remote id desired */
{
return *(int *) rmtID - *(int *) job->rmtID;
}
#endif
/*-
*-----------------------------------------------------------------------
* JobPrintCommand --
* Put out another command for the given job. If the command starts
* with an @ or a - we process it specially. In the former case,
* so long as the -s and -n flags weren't given to make, we stick
* a shell-specific echoOff command in the script. In the latter,
* we ignore errors for the entire job, unless the shell has error
* control.
* If the command is just "..." we take all future commands for this
* job to be commands to be executed once the entire graph has been
* made and return non-zero to signal that the end of the commands
* was reached. These commands are later attached to the postCommands
* node and executed by Job_End when all things are done.
* This function is called from JobStart via Lst_ForEach.
*
* Results:
* Always 1, unless the command was "..."
*
* Side Effects:
* If the command begins with a '-' and the shell has no error control,
* the JOB_IGNERR flag is set in the job descriptor.
* If the command is "..." and we're not ignoring such things,
* tailCmds is set to the successor node of the cmd.
* numCommands is incremented if the command is actually printed.
*-----------------------------------------------------------------------
*/
static int
JobPrintCommand(cmdp, jobp)
void *cmdp; /* command string to print */
void *jobp; /* job for which to print it */
{
Boolean noSpecials; /* true if we shouldn't worry about
* inserting special commands into
* the input stream. */
Boolean shutUp = FALSE; /* true if we put a no echo command
* into the command file */
Boolean errOff = FALSE; /* true if we turned error checking
* off before printing the command
* and need to turn it back on */
char *cmdTemplate; /* Template to use when printing the
* command */
char *cmdStart; /* Start of expanded command */
LstNode cmdNode; /* Node for replacing the command */
char *cmd = (char *) cmdp;
Job *job = (Job *) jobp;
noSpecials = (noExecute && !(job->node->type & OP_MAKE));
if (strcmp(cmd, "...") == 0) {
job->node->type |= OP_SAVE_CMDS;
if ((job->flags & JOB_IGNDOTS) == 0) {
job->tailCmds = Lst_Succ(Lst_Member(&job->node->commands, cmd));
return 0;
}
return 1;
}
#define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \
(void) fprintf(stdout, fmt, arg); \
(void) fflush(stdout); \
} \
(void) fprintf(job->cmdFILE, fmt, arg); \
(void) fflush(job->cmdFILE);
numCommands += 1;
/*
* For debugging, we replace each command with the result of expanding
* the variables in the command.
*/
cmdNode = Lst_Member(&job->node->commands, cmd);
cmdStart = cmd = Var_Subst(cmd, job->node, FALSE);
Lst_Replace(cmdNode, cmdStart);
cmdTemplate = "%s\n";
/*
* Check for leading @' and -'s to control echoing and error checking.
*/
while (*cmd == '@' || *cmd == '-') {
if (*cmd == '@') {
shutUp = TRUE;
} else {
errOff = TRUE;
}
cmd++;
}
while (isspace((unsigned char) *cmd))
cmd++;
if (shutUp) {
if (!(job->flags & JOB_SILENT) && !noSpecials &&
commandShell->hasEchoCtl) {
DBPRINTF("%s\n", commandShell->echoOff);
} else {
shutUp = FALSE;
}
}
if (errOff) {
if ( !(job->flags & JOB_IGNERR) && !noSpecials) {
if (commandShell->hasErrCtl) {
/*
* we don't want the error-control commands showing
* up either, so we turn off echoing while executing
* them. We could put another field in the shell
* structure to tell JobDoOutput to look for this
* string too, but why make it any more complex than
* it already is?
*/
if (!(job->flags & JOB_SILENT) && !shutUp &&
commandShell->hasEchoCtl) {
DBPRINTF("%s\n", commandShell->echoOff);
DBPRINTF("%s\n", commandShell->ignErr);
DBPRINTF("%s\n", commandShell->echoOn);
} else {
DBPRINTF("%s\n", commandShell->ignErr);
}
} else if (commandShell->ignErr &&
(*commandShell->ignErr != '\0'))
{
/*
* The shell has no error control, so we need to be
* weird to get it to ignore any errors from the command.
* If echoing is turned on, we turn it off and use the
* errCheck template to echo the command. Leave echoing
* off so the user doesn't see the weirdness we go through
* to ignore errors. Set cmdTemplate to use the weirdness
* instead of the simple "%s\n" template.
*/
if (!(job->flags & JOB_SILENT) && !shutUp &&
commandShell->hasEchoCtl) {
DBPRINTF("%s\n", commandShell->echoOff);
DBPRINTF(commandShell->errCheck, cmd);
shutUp = TRUE;
}
cmdTemplate = commandShell->ignErr;
/*
* The error ignoration (hee hee) is already taken care
* of by the ignErr template, so pretend error checking
* is still on.
*/
errOff = FALSE;
} else {
errOff = FALSE;
}
} else {
errOff = FALSE;
}
}
DBPRINTF(cmdTemplate, cmd);
if (errOff) {
/*
* If echoing is already off, there's no point in issuing the
* echoOff command. Otherwise we issue it and pretend it was on
* for the whole command...
*/
if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){
DBPRINTF("%s\n", commandShell->echoOff);
shutUp = TRUE;
}
DBPRINTF("%s\n", commandShell->errCheck);
}
if (shutUp) {
DBPRINTF("%s\n", commandShell->echoOn);
}
return 1;
}
/*-
*-----------------------------------------------------------------------
* JobSaveCommand --
* Save a command to be executed when everything else is done.
* Callback function for JobFinish...
*
* Side Effects:
* The command is tacked onto the end of postCommands's commands list.
*
*-----------------------------------------------------------------------
*/
static void
JobSaveCommand(cmd, gn)
void *cmd;
void *gn;
{
char *result;
result = Var_Subst((char *)cmd, (GNode *)gn, FALSE);
Lst_AtEnd(&postCommands->commands, result);
}
/*-
*-----------------------------------------------------------------------
* JobClose --
* Called to close both input and output pipes when a job is finished.
*
* Results:
* Nada
*
* Side Effects:
* The file descriptors associated with the job are closed.
*
*-----------------------------------------------------------------------
*/
static void
JobClose(job)
Job *job;
{
if (usePipes) {
#ifdef RMT_WILL_WATCH
Rmt_Ignore(job->inPipe);
#else
FD_CLR(job->inPipe, outputsp);
#endif
if (job->outPipe != job->inPipe) {
(void) close(job->outPipe);
}
JobDoOutput(job, TRUE);
(void) close(job->inPipe);
} else {
(void) close(job->outFd);
JobDoOutput(job, TRUE);
}
}
/*-
*-----------------------------------------------------------------------
* JobFinish --
* Do final processing for the given job including updating
* parents and starting new jobs as available/necessary. Note
* that we pay no attention to the JOB_IGNERR flag here.
* This is because when we're called because of a noexecute flag
* or something, jstat.w_status is 0 and when called from
* Job_CatchChildren, the status is zeroed if it s/b ignored.
*
* Results:
* None
*
* Side Effects:
* Some nodes may be put on the toBeMade queue.
* Final commands for the job are placed on postCommands.
*
* If we got an error and are aborting (aborting == ABORT_ERROR) and
* the job list is now empty, we are done for the day.
* If we recognized an error (errors !=0), we set the aborting flag
* to ABORT_ERROR so no more jobs will be started.
*-----------------------------------------------------------------------
*/
/*ARGSUSED*/
static void
JobFinish(job, status)
Job *job; /* job to finish */
int *status; /* sub-why job went away */
{
Boolean done;
if ((WIFEXITED(*status) &&
(((WEXITSTATUS(*status) != 0) && !(job->flags & JOB_IGNERR)))) ||
(WIFSIGNALED(*status) && (WTERMSIG(*status) != SIGCONT)))
{
/*
* If it exited non-zero and either we're doing things our
* way or we're not ignoring errors, the job is finished.
* Similarly, if the shell died because of a signal
* the job is also finished. In these
* cases, finish out the job's output before printing the exit
* status...
*/
#ifdef REMOTE
KILL(job->pid, SIGCONT);
#endif
JobClose(job);
if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
(void) fclose(job->cmdFILE);
}
done = TRUE;
#ifdef REMOTE
if (job->flags & JOB_REMOTE)
Rmt_Done(job->rmtID, job->node);
#endif
} else if (WIFEXITED(*status)) {
/*
* Deal with ignored errors in -B mode. We need to print a message
* telling of the ignored error as well as setting status.w_status
* to 0 so the next command gets run. To do this, we set done to be
* TRUE if in -B mode and the job exited non-zero.
*/
done = WEXITSTATUS(*status) != 0;
/*
* Old comment said: "Note we don't
* want to close down any of the streams until we know we're at the
* end."
* But we do. Otherwise when are we going to print the rest of the
* stuff?
*/
JobClose(job);
#ifdef REMOTE
if (job->flags & JOB_REMOTE)
Rmt_Done(job->rmtID, job->node);
#endif /* REMOTE */
} else {
/*
* No need to close things down or anything.
*/
done = FALSE;
}
if (done ||
WIFSTOPPED(*status) ||
(WIFSIGNALED(*status) && (WTERMSIG(*status) == SIGCONT)) ||
DEBUG(JOB))
{
FILE *out;
if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) {
/*
* If output is going to a file and this job is ignoring
* errors, arrange to have the exit status sent to the
* output file as well.
*/
out = fdopen(job->outFd, "w");
} else {
out = stdout;
}
if (WIFEXITED(*status)) {
if (DEBUG(JOB)) {
(void) fprintf(stdout, "Process %d exited.\n", job->pid);
(void) fflush(stdout);
}
if (WEXITSTATUS(*status) != 0) {
if (usePipes && job->node != lastNode) {
MESSAGE(out, job->node);
lastNode = job->node;
}
(void) fprintf(out, "*** Error code %d%s\n",
WEXITSTATUS(*status),
(job->flags & JOB_IGNERR) ? "(ignored)" : "");
if (job->flags & JOB_IGNERR) {
*status = 0;
}
} else if (DEBUG(JOB)) {
if (usePipes && job->node != lastNode) {
MESSAGE(out, job->node);
lastNode = job->node;
}
(void) fprintf(out, "*** Completed successfully\n");
}
} else if (WIFSTOPPED(*status)) {
if (DEBUG(JOB)) {
(void) fprintf(stdout, "Process %d stopped.\n", job->pid);
(void) fflush(stdout);
}
if (usePipes && job->node != lastNode) {
MESSAGE(out, job->node);
lastNode = job->node;
}
if (!(job->flags & JOB_REMIGRATE)) {
(void) fprintf(out, "*** Stopped -- signal %d\n",
WSTOPSIG(*status));
}
job->flags |= JOB_RESUME;
Lst_AtEnd(&stoppedJobs, job);
#ifdef REMOTE
if (job->flags & JOB_REMIGRATE)
JobRestart(job);
#endif
(void) fflush(out);
return;
} else if (WTERMSIG(*status) == SIGCONT) {
/*
* If the beastie has continued, shift the Job from the stopped
* list to the running one (or re-stop it if concurrency is
* exceeded) and go and get another child.
*/
if (job->flags & (JOB_RESUME|JOB_REMIGRATE|JOB_RESTART)) {
if (usePipes && job->node != lastNode) {
MESSAGE(out, job->node);
lastNode = job->node;
}
(void) fprintf(out, "*** Continued\n");
}
if (!(job->flags & JOB_CONTINUING)) {
if (DEBUG(JOB)) {
(void) fprintf(stdout,
"Warning: process %d was not continuing.\n",
job->pid);
(void) fflush(stdout);
}
#ifdef notdef
/*
* We don't really want to restart a job from scratch just
* because it continued, especially not without killing the
* continuing process! That's why this is ifdef'ed out.
* FD - 9/17/90
*/
JobRestart(job);
#endif
}
job->flags &= ~JOB_CONTINUING;
Lst_AtEnd(&jobs, job);
nJobs += 1;
if (!(job->flags & JOB_REMOTE)) {
if (DEBUG(JOB)) {
(void) fprintf(stdout,
"Process %d is continuing locally.\n",
job->pid);
(void) fflush(stdout);
}
nLocal += 1;
}
if (nJobs == maxJobs) {
jobFull = TRUE;
if (DEBUG(JOB)) {
(void) fprintf(stdout, "Job queue is full.\n");
(void) fflush(stdout);
}
}
(void) fflush(out);
return;
} else {
if (usePipes && job->node != lastNode) {
MESSAGE(out, job->node);
lastNode = job->node;
}
(void) fprintf(out, "*** Signal %d\n", WTERMSIG(*status));
}
(void) fflush(out);
}
/*
* Now handle the -B-mode stuff. If the beast still isn't finished,
* try and restart the job on the next command. If JobStart says it's
* ok, it's ok. If there's an error, this puppy is done.
*/
if (compatMake && (WIFEXITED(*status) &&
!Lst_IsAtEnd(&job->node->commands))) {
switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) {
case JOB_RUNNING:
done = FALSE;
break;
case JOB_ERROR:
done = TRUE;
W_SETEXITSTATUS(status, 1);
break;
case JOB_FINISHED:
/*
* If we got back a JOB_FINISHED code, JobStart has already
* called Make_Update and freed the job descriptor. We set
* done to false here to avoid fake cycles and double frees.
* JobStart needs to do the update so we can proceed up the
* graph when given the -n flag..
*/
done = FALSE;
break;
}
} else {
done = TRUE;
}
if (done &&
(aborting != ABORT_ERROR) &&
(aborting != ABORT_INTERRUPT) &&
(*status == 0))
{
/*
* As long as we aren't aborting and the job didn't return a non-zero
* status that we shouldn't ignore, we call Make_Update to update
* the parents. In addition, any saved commands for the node are placed
* on the .END target.
*/
Lst_ForEachFrom(job->tailCmds, JobSaveCommand, job->node);
job->node->made = MADE;
Make_Update(job->node);
free(job);
} else if (*status != 0) {
errors += 1;
free(job);
}
JobRestartJobs();
/*
* Set aborting if any error.
*/
if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) {
/*
* If we found any errors in this batch of children and the -k flag
* wasn't given, we set the aborting flag so no more jobs get
* started.
*/
aborting = ABORT_ERROR;
}
if ((aborting == ABORT_ERROR) && Job_Empty())
/*
* If we are aborting and the job table is now empty, we finish.
*/
Finish(errors);
}
/*-
*-----------------------------------------------------------------------
* Job_Touch --
* Touch the given target. Called by JobStart when the -t flag was
* given
*
* Results:
* None
*
* Side Effects:
* The data modification of the file is changed. In addition, if the
* file did not exist, it is created.
*-----------------------------------------------------------------------
*/
void
Job_Touch(gn, silent)
GNode *gn; /* the node of the file to touch */
Boolean silent; /* TRUE if should not print messages */
{
int streamID; /* ID of stream opened to do the touch */
struct utimbuf times; /* Times for utime() call */
if (gn->type & (OP_JOIN|OP_USE|OP_EXEC|OP_OPTIONAL)) {
/*
* .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets
* and, as such, shouldn't really be created.
*/
return;
}
if (!silent) {
(void) fprintf(stdout, "touch %s\n", gn->name);
(void) fflush(stdout);
}
if (noExecute) {
return;
}
if (gn->type & OP_ARCHV) {
Arch_Touch(gn);
} else if (gn->type & OP_LIB) {
Arch_TouchLib(gn);
} else {
char *file = gn->path ? gn->path : gn->name;
times.actime = times.modtime = now;
if (utime(file, ×) < 0){
streamID = open(file, O_RDWR | O_CREAT, 0666);
if (streamID >= 0) {
char c;
/*
* Read and write a byte to the file to change the
* modification time, then close the file.
*/
if (read(streamID, &c, 1) == 1) {
(void) lseek(streamID, 0, SEEK_SET);
(void) write(streamID, &c, 1);
}
(void) close(streamID);
} else {
(void) fprintf(stdout, "*** couldn't touch %s: %s",
file, strerror(errno));
(void) fflush(stdout);
}
}
}
}
/*-
*-----------------------------------------------------------------------
* Job_CheckCommands --
* Make sure the given node has all the commands it needs.
*
* Results:
* TRUE if the commands list is/was ok.
*
* Side Effects:
* The node will have commands from the .DEFAULT rule added to it
* if it needs them.
*-----------------------------------------------------------------------
*/
Boolean
Job_CheckCommands(gn, abortProc)
GNode *gn; /* The target whose commands need
* verifying */
void (*abortProc) __P((char *, ...));
/* Function to abort with message */
{
if (OP_NOP(gn->type) && Lst_IsEmpty(&gn->commands) &&
(gn->type & OP_LIB) == 0) {
/*
* No commands. Look for .DEFAULT rule from which we might infer
* commands
*/
if ((DEFAULT != NULL) && !Lst_IsEmpty(&DEFAULT->commands)) {
/*
* Make only looks for a .DEFAULT if the node was never the
* target of an operator, so that's what we do too. If
* a .DEFAULT was given, we substitute its commands for gn's
* commands and set the IMPSRC variable to be the target's name
* The DEFAULT node acts like a transformation rule, in that
* gn also inherits any attributes or sources attached to
* .DEFAULT itself.
*/
Make_HandleUse(DEFAULT, gn);
Var_Set(IMPSRC, Var_Value(TARGET, gn), gn);
} else if (Dir_MTime(gn) == 0) {
/*
* The node wasn't the target of an operator we have no .DEFAULT
* rule to go on and the target doesn't already exist. There's
* nothing more we can do for this branch. If the -k flag wasn't
* given, we stop in our tracks, otherwise we just don't update
* this node's parents so they never get examined.
*/
static const char msg[] = "make: don't know how to make";
if (gn->type & OP_OPTIONAL) {
(void) fprintf(stdout, "%s %s(ignored)\n", msg, gn->name);
(void) fflush(stdout);
} else if (keepgoing) {
(void) fprintf(stdout, "%s %s(continuing)\n", msg, gn->name);
(void) fflush(stdout);
return FALSE;
} else {
(*abortProc)("%s %s. Stop", msg, gn->name);
return FALSE;
}
}
}
return TRUE;
}
#ifdef RMT_WILL_WATCH
/*-
*-----------------------------------------------------------------------
* JobLocalInput --
* Handle a pipe becoming readable. Callback function for Rmt_Watch
*
* Results:
* None
*
* Side Effects:
* JobDoOutput is called.
*
*-----------------------------------------------------------------------
*/
/*ARGSUSED*/
static void
JobLocalInput(stream, job)
int stream; /* Stream that's ready (ignored) */
Job *job; /* Job to which the stream belongs */
{
JobDoOutput(job, FALSE);
}
#endif /* RMT_WILL_WATCH */
/*-
*-----------------------------------------------------------------------
* JobExec --
* Execute the shell for the given job. Called from JobStart and
* JobRestart.
*
* Results:
* None.
*
* Side Effects:
* A shell is executed, outputs is altered and the Job structure added
* to the job table.
*
*-----------------------------------------------------------------------
*/
static void
JobExec(job, argv)
Job *job; /* Job to execute */
char **argv;
{
int cpid; /* ID of new child */
if (DEBUG(JOB)) {
int i;
(void) fprintf(stdout, "Running %s %sly\n", job->node->name,
job->flags&JOB_REMOTE?"remote":"local");
(void) fprintf(stdout, "\tCommand: ");
for (i = 0; argv[i] != NULL; i++) {
(void) fprintf(stdout, "%s ", argv[i]);
}
(void) fprintf(stdout, "\n");
(void) fflush(stdout);
}
/*
* Some jobs produce no output and it's disconcerting to have
* no feedback of their running (since they produce no output, the
* banner with their name in it never appears). This is an attempt to
* provide that feedback, even if nothing follows it.
*/
if ((lastNode != job->node) && (job->flags & JOB_FIRST) &&
!(job->flags & JOB_SILENT)) {
MESSAGE(stdout, job->node);
lastNode = job->node;
}
#ifdef RMT_NO_EXEC
if (job->flags & JOB_REMOTE) {
goto jobExecFinish;
}
#endif /* RMT_NO_EXEC */
if ((cpid = vfork()) == -1) {
Punt("Cannot fork");
} else if (cpid == 0) {
/*
* Must duplicate the input stream down to the child's input and
* reset it to the beginning (again). Since the stream was marked
* close-on-exec, we must clear that bit in the new input.
*/
if (dup2(FILENO(job->cmdFILE), 0) == -1)
Punt("Cannot dup2: %s", strerror(errno));
(void) fcntl(0, F_SETFD, 0);
(void) lseek(0, 0, SEEK_SET);
if (usePipes) {
/*
* Set up the child's output to be routed through the pipe
* we've created for it.
*/
if (dup2(job->outPipe, 1) == -1)
Punt("Cannot dup2: %s", strerror(errno));
} else {
/*
* We're capturing output in a file, so we duplicate the
* descriptor to the temporary file into the standard
* output.
*/
if (dup2(job->outFd, 1) == -1)
Punt("Cannot dup2: %s", strerror(errno));
}
/*
* The output channels are marked close on exec. This bit was
* duplicated by the dup2 (on some systems), so we have to clear
* it before routing the shell's error output to the same place as
* its standard output.
*/
(void) fcntl(1, F_SETFD, 0);
if (dup2(1, 2) == -1)
Punt("Cannot dup2: %s", strerror(errno));
#ifdef USE_PGRP
/*
* We want to switch the child into a different process family so
* we can kill it and all its descendants in one fell swoop,
* by killing its process family, but not commit suicide.
*/
# if defined(SYSV)
(void) setsid();
# else
(void) setpgid(0, getpid());
# endif
#endif /* USE_PGRP */
#ifdef REMOTE
if (job->flags & JOB_REMOTE) {
Rmt_Exec(shellPath, argv, FALSE);
} else
#endif /* REMOTE */
(void) execv(shellPath, argv);
(void) write(2, "Could not execute shell\n",
sizeof("Could not execute shell"));
_exit(1);
} else {
#ifdef REMOTE
int omask = sigblock(sigmask(SIGCHLD));
#endif
job->pid = cpid;
if (usePipes && (job->flags & JOB_FIRST) ) {
/*
* The first time a job is run for a node, we set the current
* position in the buffer to the beginning and mark another
* stream to watch in the outputs mask
*/
job->curPos = 0;
#ifdef RMT_WILL_WATCH
Rmt_Watch(job->inPipe, JobLocalInput, job);
#else
if (outputsp == NULL || job->inPipe > outputsn) {
int bytes = howmany(job->inPipe+1, NFDBITS) * sizeof(fd_mask);
int obytes = howmany(outputsn+1, NFDBITS) * sizeof(fd_mask);
if (outputsp == NULL || obytes != bytes) {
outputsp = realloc(outputsp, bytes);
if (outputsp == NULL)
return;
memset(outputsp + obytes, 0, bytes - obytes);
}
outputsn = job->inPipe;
}
FD_SET(job->inPipe, outputsp);
#endif /* RMT_WILL_WATCH */
}
if (job->flags & JOB_REMOTE) {
#ifndef REMOTE
job->rmtID = 0;
#else
job->rmtID = Rmt_LastID(job->pid);
#endif /* REMOTE */
} else {
nLocal += 1;
/*
* XXX: Used to not happen if REMOTE. Why?
*/
if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
(void) fclose(job->cmdFILE);
job->cmdFILE = NULL;
}
}
#ifdef REMOTE
(void) sigsetmask(omask);
#endif
}
#ifdef RMT_NO_EXEC
jobExecFinish:
#endif
/*
* Now the job is actually running, add it to the table.
*/
nJobs += 1;
Lst_AtEnd(&jobs, job);
if (nJobs == maxJobs) {
jobFull = TRUE;
}
}
/*-
*-----------------------------------------------------------------------
* JobMakeArgv --
* Create the argv needed to execute the shell for a given job.
*
*
* Results:
*
* Side Effects:
*
*-----------------------------------------------------------------------
*/
static void
JobMakeArgv(job, argv)
Job *job;
char **argv;
{
int argc;
static char args[10]; /* For merged arguments */
argv[0] = shellName;
argc = 1;
if ((commandShell->exit && (*commandShell->exit != '-')) ||
(commandShell->echo && (*commandShell->echo != '-')))
{
/*
* At least one of the flags doesn't have a minus before it, so
* merge them together. Have to do this because the *(&(@*#*&#$#
* Bourne shell thinks its second argument is a file to source.
* Grrrr. Note the ten-character limitation on the combined arguments.
*/
(void)sprintf(args, "-%s%s",
((job->flags & JOB_IGNERR) ? "" :
(commandShell->exit ? commandShell->exit : "")),
((job->flags & JOB_SILENT) ? "" :
(commandShell->echo ? commandShell->echo : "")));
if (args[1]) {
argv[argc] = args;
argc++;
}
} else {
if (!(job->flags & JOB_IGNERR) && commandShell->exit) {
argv[argc] = commandShell->exit;
argc++;
}
if (!(job->flags & JOB_SILENT) && commandShell->echo) {
argv[argc] = commandShell->echo;
argc++;
}
}
argv[argc] = NULL;
}
/*-
*-----------------------------------------------------------------------
* JobRestart --
* Restart a job that stopped for some reason.
*
* Results:
* None.
*
* Side Effects:
* jobFull will be set if the job couldn't be run.
*
*-----------------------------------------------------------------------
*/
static void
JobRestart(job)
Job *job; /* Job to restart */
{
#ifdef REMOTE
int host;
#endif
if (job->flags & JOB_REMIGRATE) {
if (
#ifdef REMOTE
verboseRemigrates ||
#endif
DEBUG(JOB)) {
(void) fprintf(stdout, "*** remigrating %x(%s)\n",
job->pid, job->node->name);
(void) fflush(stdout);
}
#ifdef REMOTE
if (!Rmt_ReExport(job->pid, job->node, &host)) {
if (verboseRemigrates || DEBUG(JOB)) {
(void) fprintf(stdout, "*** couldn't migrate...\n");
(void) fflush(stdout);
}
#endif
if (nLocal != maxLocal) {
/*
* Job cannot be remigrated, but there's room on the local
* machine, so resume the job and note that another
* local job has started.
*/
if (
#ifdef REMOTE
verboseRemigrates ||
#endif
DEBUG(JOB)) {
(void) fprintf(stdout, "*** resuming on local machine\n");
(void) fflush(stdout);
}
KILL(job->pid, SIGCONT);
nLocal +=1;
#ifdef REMOTE
job->flags &= ~(JOB_REMIGRATE|JOB_RESUME|JOB_REMOTE);
job->flags |= JOB_CONTINUING;
#else
job->flags &= ~(JOB_REMIGRATE|JOB_RESUME);
#endif
} else {
/*
* Job cannot be restarted. Mark the table as full and
* place the job back on the list of stopped jobs.
*/
if (
#ifdef REMOTE
verboseRemigrates ||
#endif
DEBUG(JOB)) {
(void) fprintf(stdout, "*** holding\n");
(void) fflush(stdout);
}
Lst_AtFront(&stoppedJobs, job);
jobFull = TRUE;
if (DEBUG(JOB)) {
(void) fprintf(stdout, "Job queue is full.\n");
(void) fflush(stdout);
}
return;
}
#ifdef REMOTE
} else {
/*
* Clear out the remigrate and resume flags. Set the continuing
* flag so we know later on that the process isn't exiting just
* because of a signal.
*/
job->flags &= ~(JOB_REMIGRATE|JOB_RESUME);
job->flags |= JOB_CONTINUING;
job->rmtID = host;
}
#endif
Lst_AtEnd(&jobs, job);
nJobs += 1;
if (nJobs == maxJobs) {
jobFull = TRUE;
if (DEBUG(JOB)) {
(void) fprintf(stdout, "Job queue is full.\n");
(void) fflush(stdout);
}
}
} else if (job->flags & JOB_RESTART) {
/*
* Set up the control arguments to the shell. This is based on the
* flags set earlier for this job. If the JOB_IGNERR flag is clear,
* the 'exit' flag of the commandShell is used to cause it to exit
* upon receiving an error. If the JOB_SILENT flag is clear, the
* 'echo' flag of the commandShell is used to get it to start echoing
* as soon as it starts processing commands.
*/
char *argv[4];
JobMakeArgv(job, argv);
if (DEBUG(JOB)) {
(void) fprintf(stdout, "Restarting %s...", job->node->name);
(void) fflush(stdout);
}
#ifdef REMOTE
if ((job->node->type&OP_NOEXPORT) ||
(nLocal < maxLocal && runLocalFirst)
# ifdef RMT_NO_EXEC
|| !Rmt_Export(shellPath, argv, job)
# else
|| !Rmt_Begin(shellPath, argv, job->node)
# endif
#endif
{
if (((nLocal >= maxLocal) && !(job->flags & JOB_SPECIAL))) {
/*
* Can't be exported and not allowed to run locally -- put it
* back on the hold queue and mark the table full
*/
if (DEBUG(JOB)) {
(void) fprintf(stdout, "holding\n");
(void) fflush(stdout);
}
Lst_AtFront(&stoppedJobs, job);
jobFull = TRUE;
if (DEBUG(JOB)) {
(void) fprintf(stdout, "Job queue is full.\n");
(void) fflush(stdout);
}
return;
} else {
/*
* Job may be run locally.
*/
if (DEBUG(JOB)) {
(void) fprintf(stdout, "running locally\n");
(void) fflush(stdout);
}
job->flags &= ~JOB_REMOTE;
}
}
#ifdef REMOTE
else {
/*
* Can be exported. Hooray!
*/
if (DEBUG(JOB)) {
(void) fprintf(stdout, "exporting\n");
(void) fflush(stdout);
}
job->flags |= JOB_REMOTE;
}
#endif
JobExec(job, argv);
} else {
/*
* The job has stopped and needs to be restarted. Why it stopped,
* we don't know...
*/
if (DEBUG(JOB)) {
(void) fprintf(stdout, "Resuming %s...", job->node->name);
(void) fflush(stdout);
}
if (((job->flags & JOB_REMOTE) ||
(nLocal < maxLocal) ||
#ifdef REMOTE
(((job->flags & JOB_SPECIAL) &&
(job->node->type & OP_NOEXPORT)) &&
(maxLocal == 0))) &&
#else
((job->flags & JOB_SPECIAL) &&
(maxLocal == 0))) &&
#endif
(nJobs != maxJobs))
{
/*
* If the job is remote, it's ok to resume it as long as the
* maximum concurrency won't be exceeded. If it's local and
* we haven't reached the local concurrency limit already (or the
* job must be run locally and maxLocal is 0), it's also ok to
* resume it.
*/
Boolean error;
int status;
#ifdef RMT_WANTS_SIGNALS
if (job->flags & JOB_REMOTE) {
error = !Rmt_Signal(job, SIGCONT);
} else
#endif /* RMT_WANTS_SIGNALS */
error = (KILL(job->pid, SIGCONT) != 0);
if (!error) {
/*
* Make sure the user knows we've continued the beast and
* actually put the thing in the job table.
*/
job->flags |= JOB_CONTINUING;
W_SETTERMSIG(&status, SIGCONT);
JobFinish(job, &status);
job->flags &= ~(JOB_RESUME|JOB_CONTINUING);
if (DEBUG(JOB)) {
(void) fprintf(stdout, "done\n");
(void) fflush(stdout);
}
} else {
Error("couldn't resume %s: %s",
job->node->name, strerror(errno));
status = 0;
W_SETEXITSTATUS(&status, 1);
JobFinish(job, &status);
}
} else {
/*
* Job cannot be restarted. Mark the table as full and
* place the job back on the list of stopped jobs.
*/
if (DEBUG(JOB)) {
(void) fprintf(stdout, "table full\n");
(void) fflush(stdout);
}
Lst_AtFront(&stoppedJobs, job);
jobFull = TRUE;
if (DEBUG(JOB)) {
(void) fprintf(stdout, "Job queue is full.\n");
(void) fflush(stdout);
}
}
}
}
/*-
*-----------------------------------------------------------------------
* JobStart --
* Start a target-creation process going for the target described
* by the graph node gn.
*
* Results:
* JOB_ERROR if there was an error in the commands, JOB_FINISHED
* if there isn't actually anything left to do for the job and
* JOB_RUNNING if the job has been started.
*
* Side Effects:
* A new Job node is created and added to the list of running
* jobs. PMake is forked and a child shell created.
*-----------------------------------------------------------------------
*/
static int
JobStart(gn, flags, previous)
GNode *gn; /* target to create */
int flags; /* flags for the job to override normal ones.
* e.g. JOB_SPECIAL or JOB_IGNDOTS */
Job *previous; /* The previous Job structure for this node,
* if any. */
{
register Job *job; /* new job descriptor */
char *argv[4]; /* Argument vector to shell */
Boolean cmdsOK; /* true if the nodes commands were all right */
Boolean local; /* Set true if the job was run locally */
Boolean noExec; /* Set true if we decide not to run the job */
int tfd; /* where to stash those pesky commands */
if (previous != NULL) {
previous->flags &= ~(JOB_FIRST|JOB_IGNERR|JOB_SILENT|JOB_REMOTE);
job = previous;
} else {
job = (Job *) emalloc(sizeof(Job));
if (job == NULL) {
Punt("JobStart out of memory");
}
flags |= JOB_FIRST;
}
job->node = gn;
job->tailCmds = NULL;
/*
* Set the initial value of the flags for this job based on the global
* ones and the node's attributes... Any flags supplied by the caller
* are also added to the field.
*/
job->flags = 0;
if (Targ_Ignore(gn)) {
job->flags |= JOB_IGNERR;
}
if (Targ_Silent(gn)) {
job->flags |= JOB_SILENT;
}
job->flags |= flags;
/*
* Check the commands now so any attributes from .DEFAULT have a chance
* to migrate to the node
*/
if (!compatMake && job->flags & JOB_FIRST) {
cmdsOK = Job_CheckCommands(gn, Error);
} else {
cmdsOK = TRUE;
}
/*
* If the -n flag wasn't given, we open up OUR (not the child's)
* temporary file to stuff commands in it. The thing is rd/wr so we don't
* need to reopen it to feed it to the shell. If the -n flag *was* given,
* we just set the file to be stdout. Cute, huh?
*/
if ((gn->type & OP_MAKE) || (!noExecute && !touchFlag)) {
/*
* We're serious here, but if the commands were bogus, we're
* also dead...
*/
if (!cmdsOK) {
DieHorribly();
}
(void) strcpy(tfile, TMPPAT);
if ((tfd = mkstemp(tfile)) == -1)
Punt("Cannot create temp file: %s", strerror(errno));
job->cmdFILE = fdopen(tfd, "w+");
eunlink(tfile);
if (job->cmdFILE == NULL) {
close(tfd);
Punt("Could not open %s", tfile);
}
(void) fcntl(FILENO(job->cmdFILE), F_SETFD, 1);
/*
* Send the commands to the command file, flush all its buffers then
* rewind and remove the thing.
*/
noExec = FALSE;
/*
* used to be backwards; replace when start doing multiple commands
* per shell.
*/
if (compatMake) {
/*
* Be compatible: If this is the first time for this node,
* verify its commands are ok and open the commands list for
* sequential access by later invocations of JobStart.
* Once that is done, we take the next command off the list
* and print it to the command file. If the command was an
* ellipsis, note that there's nothing more to execute.
*/
if ((job->flags&JOB_FIRST) && (Lst_Open(&gn->commands) != SUCCESS)){
cmdsOK = FALSE;
} else {
LstNode ln = Lst_Next(&gn->commands);
if ((ln == NULL) || !JobPrintCommand(Lst_Datum(ln), job)) {
noExec = TRUE;
Lst_Close(&gn->commands);
}
if (noExec && !(job->flags & JOB_FIRST)) {
/*
* If we're not going to execute anything, the job
* is done and we need to close down the various
* file descriptors we've opened for output, then
* call JobDoOutput to catch the final characters or
* send the file to the screen... Note that the i/o streams
* are only open if this isn't the first job.
* Note also that this could not be done in
* Job_CatchChildren b/c it wasn't clear if there were
* more commands to execute or not...
*/
JobClose(job);
}
}
} else {
/*
* We can do all the commands at once. hooray for sanity
*/
numCommands = 0;
Lst_Find(&gn->commands, JobPrintCommand, job);
/*
* If we didn't print out any commands to the shell script,
* there's not much point in executing the shell, is there?
*/
if (numCommands == 0) {
noExec = TRUE;
}
}
} else if (noExecute) {
/*
* Not executing anything -- just print all the commands to stdout
* in one fell swoop. This will still set up job->tailCmds correctly.
*/
if (lastNode != gn) {
MESSAGE(stdout, gn);
lastNode = gn;
}
job->cmdFILE = stdout;
/*
* Only print the commands if they're ok, but don't die if they're
* not -- just let the user know they're bad and keep going. It
* doesn't do any harm in this case and may do some good.
*/
if (cmdsOK)
Lst_Find(&gn->commands, JobPrintCommand, job);
/*
* Don't execute the shell, thank you.
*/
noExec = TRUE;
} else {
/*
* Just touch the target and note that no shell should be executed.
* Set cmdFILE to stdout to make life easier. Check the commands, too,
* but don't die if they're no good -- it does no harm to keep working
* up the graph.
*/
job->cmdFILE = stdout;
Job_Touch(gn, job->flags&JOB_SILENT);
noExec = TRUE;
}
/*
* If we're not supposed to execute a shell, don't.
*/
if (noExec) {
/*
* Unlink and close the command file if we opened one
*/
if (job->cmdFILE != stdout) {
if (job->cmdFILE != NULL)
(void) fclose(job->cmdFILE);
} else {
(void) fflush(stdout);
}
/*
* We only want to work our way up the graph if we aren't here because
* the commands for the job were no good.
*/
if (cmdsOK) {
if (aborting == 0) {
Lst_ForEachFrom(job->tailCmds, JobSaveCommand, job->node);
Make_Update(job->node);
}
free(job);
return JOB_FINISHED;
} else {
free(job);
return JOB_ERROR;
}
} else {
(void) fflush(job->cmdFILE);
}
/*
* Set up the control arguments to the shell. This is based on the flags
* set earlier for this job.
*/
JobMakeArgv(job, argv);
/*
* If we're using pipes to catch output, create the pipe by which we'll
* get the shell's output. If we're using files, print out that we're
* starting a job and then set up its temporary-file name.
*/
if (!compatMake || (job->flags & JOB_FIRST)) {
if (usePipes) {
int fd[2];
if (pipe(fd) == -1)
Punt("Cannot create pipe: %s", strerror(errno));
job->inPipe = fd[0];
job->outPipe = fd[1];
(void) fcntl(job->inPipe, F_SETFD, 1);
(void) fcntl(job->outPipe, F_SETFD, 1);
} else {
(void) fprintf(stdout, "Remaking `%s'\n", gn->name);
(void) fflush(stdout);
(void) strcpy(job->outFile, TMPPAT);
if ((job->outFd = mkstemp(job->outFile)) == -1)
Punt("Cannot create temp file: %s", strerror(errno));
(void) fcntl(job->outFd, F_SETFD, 1);
}
}
#ifdef REMOTE
if (!(gn->type & OP_NOEXPORT) && !(runLocalFirst && nLocal < maxLocal)) {
#ifdef RMT_NO_EXEC
local = !Rmt_Export(shellPath, argv, job);
#else
local = !Rmt_Begin(shellPath, argv, job->node);
#endif /* RMT_NO_EXEC */
if (!local) {
job->flags |= JOB_REMOTE;
}
} else
#endif
local = TRUE;
if (local && (((nLocal >= maxLocal) &&
!(job->flags & JOB_SPECIAL) &&
#ifdef REMOTE
(!(gn->type & OP_NOEXPORT) || (maxLocal != 0))
#else
(maxLocal != 0)
#endif
)))
{
/*
* The job can only be run locally, but we've hit the limit of
* local concurrency, so put the job on hold until some other job
* finishes. Note that the special jobs (.BEGIN, .INTERRUPT and .END)
* may be run locally even when the local limit has been reached
* (e.g. when maxLocal == 0), though they will be exported if at
* all possible. In addition, any target marked with .NOEXPORT will
* be run locally if maxLocal is 0.
*/
jobFull = TRUE;
if (DEBUG(JOB)) {
(void) fprintf(stdout, "Can only run job locally.\n");
(void) fflush(stdout);
}
job->flags |= JOB_RESTART;
Lst_AtEnd(&stoppedJobs, job);
} else {
if ((nLocal >= maxLocal) && local) {
/*
* If we're running this job locally as a special case (see above),
* at least say the table is full.
*/
jobFull = TRUE;
if (DEBUG(JOB)) {
(void) fprintf(stdout, "Local job queue is full.\n");
(void) fflush(stdout);
}
}
JobExec(job, argv);
}
return(JOB_RUNNING);
}
static char *
JobOutput(job, cp, endp, msg)
register Job *job;
register char *cp, *endp;
int msg;
{
register char *ecp;
if (commandShell->noPrint) {
ecp = strstr(cp, commandShell->noPrint);
while (ecp != NULL) {
if (cp != ecp) {
*ecp = '\0';
if (msg && job->node != lastNode) {
MESSAGE(stdout, job->node);
lastNode = job->node;
}
/*
* The only way there wouldn't be a newline after
* this line is if it were the last in the buffer.
* however, since the non-printable comes after it,
* there must be a newline, so we don't print one.
*/
(void) fprintf(stdout, "%s", cp);
(void) fflush(stdout);
}
cp = ecp + commandShell->noPLen;
if (cp != endp) {
/*
* Still more to print, look again after skipping
* the whitespace following the non-printable
* command....
*/
cp++;
while (*cp == ' ' || *cp == '\t' || *cp == '\n') {
cp++;
}
ecp = strstr(cp, commandShell->noPrint);
} else {
return cp;
}
}
}
return cp;
}
/*-
*-----------------------------------------------------------------------
* JobDoOutput --
* This function is called at different times depending on
* whether the user has specified that output is to be collected
* via pipes or temporary files. In the former case, we are called
* whenever there is something to read on the pipe. We collect more
* output from the given job and store it in the job's outBuf. If
* this makes up a line, we print it tagged by the job's identifier,
* as necessary.
* If output has been collected in a temporary file, we open the
* file and read it line by line, transfering it to our own
* output channel until the file is empty. At which point we
* remove the temporary file.
* In both cases, however, we keep our figurative eye out for the
* 'noPrint' line for the shell from which the output came. If
* we recognize a line, we don't print it. If the command is not
* alone on the line (the character after it is not \0 or \n), we
* do print whatever follows it.
*
* Results:
* None
*
* Side Effects:
* curPos may be shifted as may the contents of outBuf.
*-----------------------------------------------------------------------
*/
STATIC void
JobDoOutput(job, finish)
register Job *job; /* the job whose output needs printing */
Boolean finish; /* TRUE if this is the last time we'll be
* called for this job */
{
Boolean gotNL = FALSE; /* true if got a newline */
Boolean fbuf; /* true if our buffer filled up */
register int nr; /* number of bytes read */
register int i; /* auxiliary index into outBuf */
register int max; /* limit for i (end of current data) */
int nRead; /* (Temporary) number of bytes read */
FILE *oFILE; /* Stream pointer to shell's output file */
char inLine[132];
if (usePipes) {
/*
* Read as many bytes as will fit in the buffer.
*/
end_loop:
gotNL = FALSE;
fbuf = FALSE;
nRead = read(job->inPipe, &job->outBuf[job->curPos],
JOB_BUFSIZE - job->curPos);
if (nRead < 0) {
if (DEBUG(JOB)) {
perror("JobDoOutput(piperead)");
}
nr = 0;
} else {
nr = nRead;
}
/*
* If we hit the end-of-file (the job is dead), we must flush its
* remaining output, so pretend we read a newline if there's any
* output remaining in the buffer.
* Also clear the 'finish' flag so we stop looping.
*/
if ((nr == 0) && (job->curPos != 0)) {
job->outBuf[job->curPos] = '\n';
nr = 1;
finish = FALSE;
} else if (nr == 0) {
finish = FALSE;
}
/*
* Look for the last newline in the bytes we just got. If there is
* one, break out of the loop with 'i' as its index and gotNL set
* TRUE.
*/
max = job->curPos + nr;
for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
if (job->outBuf[i] == '\n') {
gotNL = TRUE;
break;
} else if (job->outBuf[i] == '\0') {
/*
* Why?
*/
job->outBuf[i] = ' ';
}
}
if (!gotNL) {
job->curPos += nr;
if (job->curPos == JOB_BUFSIZE) {
/*
* If we've run out of buffer space, we have no choice
* but to print the stuff. sigh.
*/
fbuf = TRUE;
i = job->curPos;
}
}
if (gotNL || fbuf) {
/*
* Need to send the output to the screen. Null terminate it
* first, overwriting the newline character if there was one.
* So long as the line isn't one we should filter (according
* to the shell description), we print the line, preceeded
* by a target banner if this target isn't the same as the
* one for which we last printed something.
* The rest of the data in the buffer are then shifted down
* to the start of the buffer and curPos is set accordingly.
*/
job->outBuf[i] = '\0';
if (i >= job->curPos) {
char *cp;
cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE);
/*
* There's still more in that thar buffer. This time, though,
* we know there's no newline at the end, so we add one of
* our own free will.
*/
if (*cp != '\0') {
if (job->node != lastNode) {
MESSAGE(stdout, job->node);
lastNode = job->node;
}
(void) fprintf(stdout, "%s%s", cp, gotNL ? "\n" : "");
(void) fflush(stdout);
}
}
if (i < max - 1) {
/* shift the remaining characters down */
(void) memcpy(job->outBuf, &job->outBuf[i + 1], max - (i + 1));
job->curPos = max - (i + 1);
} else {
/*
* We have written everything out, so we just start over
* from the start of the buffer. No copying. No nothing.
*/
job->curPos = 0;
}
}
if (finish) {
/*
* If the finish flag is true, we must loop until we hit
* end-of-file on the pipe. This is guaranteed to happen
* eventually since the other end of the pipe is now closed
* (we closed it explicitly and the child has exited). When
* we do get an EOF, finish will be set FALSE and we'll fall
* through and out.
*/
goto end_loop;
}
} else {
/*
* We've been called to retrieve the output of the job from the
* temporary file where it's been squirreled away. This consists of
* opening the file, reading the output line by line, being sure not
* to print the noPrint line for the shell we used, then close and
* remove the temporary file. Very simple.
*
* Change to read in blocks and do FindSubString type things as for
* pipes? That would allow for "@echo -n..."
*/
oFILE = fopen(job->outFile, "r");
if (oFILE != NULL) {
(void) fprintf(stdout, "Results of making %s:\n", job->node->name);
(void) fflush(stdout);
while (fgets(inLine, sizeof(inLine), oFILE) != NULL) {
register char *cp, *endp, *oendp;
cp = inLine;
oendp = endp = inLine + strlen(inLine);
if (endp[-1] == '\n') {
*--endp = '\0';
}
cp = JobOutput(job, inLine, endp, FALSE);
/*
* There's still more in that thar buffer. This time, though,
* we know there's no newline at the end, so we add one of
* our own free will.
*/
(void) fprintf(stdout, "%s", cp);
(void) fflush(stdout);
if (endp != oendp) {
(void) fprintf(stdout, "\n");
(void) fflush(stdout);
}
}
(void) fclose(oFILE);
(void) eunlink(job->outFile);
}
}
}
/*-
*-----------------------------------------------------------------------
* Job_CatchChildren --
* Handle the exit of a child. Called from Make_Make.
*
* Results:
* none.
*
* Side Effects:
* The job descriptor is removed from the list of children.
*
* Notes:
* We do waits, blocking or not, according to the wisdom of our
* caller, until there are no more children to report. For each
* job, call JobFinish to finish things off. This will take care of
* putting jobs on the stoppedJobs queue.
*
*-----------------------------------------------------------------------
*/
void
Job_CatchChildren(block)
Boolean block; /* TRUE if should block on the wait. */
{
int pid; /* pid of dead child */
register Job *job; /* job descriptor for dead child */
LstNode jnode; /* list element for finding job */
int status; /* Exit/termination status */
/*
* Don't even bother if we know there's no one around.
*/
if (nLocal == 0) {
return;
}
while ((pid = waitpid((pid_t) -1, &status,
(block?0:WNOHANG)|WUNTRACED)) > 0)
{
if (DEBUG(JOB)) {
(void) fprintf(stdout, "Process %d exited or stopped.\n", pid);
(void) fflush(stdout);
}
jnode = Lst_Find(&jobs, JobCmpPid, &pid);
if (jnode == NULL) {
if (WIFSIGNALED(status) && (WTERMSIG(status) == SIGCONT)) {
jnode = Lst_Find(&stoppedJobs, JobCmpPid, &pid);
if (jnode == NULL) {
Error("Resumed child (%d) not in table", pid);
continue;
}
job = (Job *)Lst_Datum(jnode);
Lst_Remove(&stoppedJobs, jnode);
} else {
Error("Child (%d) not in table?", pid);
continue;
}
} else {
job = (Job *) Lst_Datum(jnode);
Lst_Remove(&jobs, jnode);
nJobs -= 1;
if (jobFull && DEBUG(JOB)) {
(void) fprintf(stdout, "Job queue is no longer full.\n");
(void) fflush(stdout);
}
jobFull = FALSE;
#ifdef REMOTE
if (!(job->flags & JOB_REMOTE)) {
if (DEBUG(JOB)) {
(void) fprintf(stdout,
"Job queue has one fewer local process.\n");
(void) fflush(stdout);
}
nLocal -= 1;
}
#else
nLocal -= 1;
#endif
}
JobFinish(job, &status);
}
}
/*-
*-----------------------------------------------------------------------
* Job_CatchOutput --
* Catch the output from our children, if we're using
* pipes do so. Otherwise just block time until we get a
* signal (most likely a SIGCHLD) since there's no point in
* just spinning when there's nothing to do and the reaping
* of a child can wait for a while.
*
* Results:
* None
*
* Side Effects:
* Output is read from pipes if we're piping.
* -----------------------------------------------------------------------
*/
void
Job_CatchOutput()
{
int nfds;
struct timeval timeout;
register LstNode ln;
register Job *job;
#ifdef RMT_WILL_WATCH
int pnJobs; /* Previous nJobs */
#endif
(void) fflush(stdout);
#ifdef RMT_WILL_WATCH
pnJobs = nJobs;
/*
* It is possible for us to be called with nJobs equal to 0. This happens
* if all the jobs finish and a job that is stopped cannot be run
* locally (eg if maxLocal is 0) and cannot be exported. The job will
* be placed back on the stoppedJobs queue, Job_Empty() will return false,
* Make_Run will call us again when there's nothing for which to wait.
* nJobs never changes, so we loop forever. Hence the check. It could
* be argued that we should sleep for a bit so as not to swamp the
* exportation system with requests. Perhaps we should.
*
* NOTE: IT IS THE RESPONSIBILITY OF Rmt_Wait TO CALL Job_CatchChildren
* IN A TIMELY FASHION TO CATCH ANY LOCALLY RUNNING JOBS THAT EXIT.
* It may use the variable nLocal to determine if it needs to call
* Job_CatchChildren (if nLocal is 0, there's nothing for which to
* wait...)
*/
while (nJobs != 0 && pnJobs == nJobs) {
Rmt_Wait();
}
#else
if (usePipes) {
int count = howmany(outputsn+1, NFDBITS) * sizeof(fd_mask);
fd_set *readfdsp = malloc(count);
if (readfdsp == NULL)
return;
memcpy(readfdsp, outputsp, count);
timeout.tv_sec = SEL_SEC;
timeout.tv_usec = SEL_USEC;
if ((nfds = select(outputsn+1, readfdsp, (fd_set *) 0,
(fd_set *) 0, &timeout)) <= 0) {
free(readfdsp);
return;
} else {
if (Lst_Open(&jobs) == FAILURE) {
free(readfdsp);
Punt("Cannot open job table");
}
while (nfds && (ln = Lst_Next(&jobs)) != NULL) {
job = (Job *) Lst_Datum(ln);
if (FD_ISSET(job->inPipe, readfdsp)) {
JobDoOutput(job, FALSE);
nfds -= 1;
}
}
Lst_Close(&jobs);
}
free(readfdsp);
}
#endif /* RMT_WILL_WATCH */
}
/*-
*-----------------------------------------------------------------------
* Job_Make --
* Start the creation of a target. Basically a front-end for
* JobStart used by the Make module.
*
* Results:
* None.
*
* Side Effects:
* Another job is started.
*
*-----------------------------------------------------------------------
*/
void
Job_Make(gn)
GNode *gn;
{
(void) JobStart(gn, 0, NULL);
}
/*-
*-----------------------------------------------------------------------
* Job_Init --
* Initialize the process module
*
* Results:
* none
*
* Side Effects:
* lists and counters are initialized
*-----------------------------------------------------------------------
*/
void
Job_Init(maxproc, maxlocal)
int maxproc; /* the greatest number of jobs which may be
* running at one time */
int maxlocal; /* the greatest number of local jobs which may
* be running at once. */
{
GNode *begin; /* node for commands to do at the very start */
Lst_Init(&jobs);
Lst_Init(&stoppedJobs);
maxJobs = maxproc;
maxLocal = maxlocal;
nJobs = 0;
nLocal = 0;
jobFull = FALSE;
aborting = 0;
errors = 0;
lastNode = NULL;
if (maxJobs == 1
#ifdef REMOTE
|| noMessages
#endif
) {
/*
* If only one job can run at a time, there's no need for a banner,
* no is there?
*/
targFmt = "";
} else {
targFmt = TARG_FMT;
}
if (shellPath == NULL) {
/*
* The user didn't specify a shell to use, so we are using the
* default one... Both the absolute path and the last component
* must be set. The last component is taken from the 'name' field
* of the default shell description pointed-to by commandShell.
* All default shells are located in _PATH_DEFSHELLDIR.
*/
shellName = commandShell->name;
shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH);
}
if (commandShell->exit == NULL) {
commandShell->exit = "";
}
if (commandShell->echo == NULL) {
commandShell->echo = "";
}
/*
* Catch the four signals that POSIX specifies if they aren't ignored.
* JobPassSig will take care of calling JobInterrupt if appropriate.
*/
if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
(void) signal(SIGINT, JobPassSig);
}
if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
(void) signal(SIGHUP, JobPassSig);
}
if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
(void) signal(SIGQUIT, JobPassSig);
}
if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
(void) signal(SIGTERM, JobPassSig);
}
/*
* There are additional signals that need to be caught and passed if
* either the export system wants to be told directly of signals or if
* we're giving each job its own process group (since then it won't get
* signals from the terminal driver as we own the terminal)
*/
#if defined(RMT_WANTS_SIGNALS) || defined(USE_PGRP)
if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) {
(void) signal(SIGTSTP, JobPassSig);
}
if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) {
(void) signal(SIGTTOU, JobPassSig);
}
if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) {
(void) signal(SIGTTIN, JobPassSig);
}
if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) {
(void) signal(SIGWINCH, JobPassSig);
}
#endif
begin = Targ_FindNode(".BEGIN", TARG_NOCREATE);
if (begin != NULL) {
JobStart(begin, JOB_SPECIAL, (Job *)0);
while (nJobs) {
Job_CatchOutput();
#ifndef RMT_WILL_WATCH
Job_CatchChildren(!usePipes);
#endif /* RMT_WILL_WATCH */
}
}
postCommands = Targ_FindNode(".END", TARG_CREATE);
}
/*-
*-----------------------------------------------------------------------
* Job_Full --
* See if the job table is full. It is considered full if it is OR
* if we are in the process of aborting OR if we have
* reached/exceeded our local quota. This prevents any more jobs
* from starting up.
*
* Results:
* TRUE if the job table is full, FALSE otherwise
* Side Effects:
* None.
*-----------------------------------------------------------------------
*/
Boolean
Job_Full()
{
return(aborting || jobFull);
}
/*-
*-----------------------------------------------------------------------
* Job_Empty --
* See if the job table is empty. Because the local concurrency may
* be set to 0, it is possible for the job table to become empty,
* while the list of stoppedJobs remains non-empty. In such a case,
* we want to restart as many jobs as we can.
*
* Results:
* TRUE if it is. FALSE if it ain't.
*
* Side Effects:
* None.
*
* -----------------------------------------------------------------------
*/
Boolean
Job_Empty()
{
if (nJobs == 0) {
if (!Lst_IsEmpty(&stoppedJobs) && !aborting) {
/*
* The job table is obviously not full if it has no jobs in
* it...Try and restart the stopped jobs.
*/
jobFull = FALSE;
JobRestartJobs();
return(FALSE);
} else {
return(TRUE);
}
} else {
return(FALSE);
}
}
/*-
*-----------------------------------------------------------------------
* JobMatchShell --
* Find a matching shell in 'shells' given its final component.
*
* Results:
* A pointer to the Shell structure.
*
* Side Effects:
* None.
*
*-----------------------------------------------------------------------
*/
static Shell *
JobMatchShell(name)
char *name; /* Final component of shell path */
{
register Shell *sh; /* Pointer into shells table */
Shell *match; /* Longest-matching shell */
register char *cp1,
*cp2;
char *eoname;
eoname = name + strlen(name);
match = NULL;
for (sh = shells; sh->name != NULL; sh++) {
for (cp1 = eoname - strlen(sh->name), cp2 = sh->name;
*cp1 != '\0' && *cp1 == *cp2;
cp1++, cp2++) {
continue;
}
if (*cp1 != *cp2) {
continue;
} else if (match == NULL || strlen(match->name) < strlen(sh->name)) {
match = sh;
}
}
return(match == NULL ? sh : match);
}
/*-
*-----------------------------------------------------------------------
* Job_ParseShell --
* Parse a shell specification and set up commandShell, shellPath
* and shellName appropriately.
*
* Results:
* FAILURE if the specification was incorrect.
*
* Side Effects:
* commandShell points to a Shell structure (either predefined or
* created from the shell spec), shellPath is the full path of the
* shell described by commandShell, while shellName is just the
* final component of shellPath.
*
* Notes:
* A shell specification consists of a .SHELL target, with dependency
* operator, followed by a series of blank-separated words. Double
* quotes can be used to use blanks in words. A backslash escapes
* anything (most notably a double-quote and a space) and
* provides the functionality it does in C. Each word consists of
* keyword and value separated by an equal sign. There should be no
* unnecessary spaces in the word. The keywords are as follows:
* name Name of shell.
* path Location of shell. Overrides "name" if given
* quiet Command to turn off echoing.
* echo Command to turn echoing on
* filter Result of turning off echoing that shouldn't be
* printed.
* echoFlag Flag to turn echoing on at the start
* errFlag Flag to turn error checking on at the start
* hasErrCtl True if shell has error checking control
* check Command to turn on error checking if hasErrCtl
* is TRUE or template of command to echo a command
* for which error checking is off if hasErrCtl is
* FALSE.
* ignore Command to turn off error checking if hasErrCtl
* is TRUE or template of command to execute a
* command so as to ignore any errors it returns if
* hasErrCtl is FALSE.
*
*-----------------------------------------------------------------------
*/
ReturnStatus
Job_ParseShell(line)
char *line; /* The shell spec */
{
char **words;
int wordCount;
register char **argv;
register int argc;
char *path;
Shell newShell;
Boolean fullSpec = FALSE;
while (isspace(*line)) {
line++;
}
efree(shellArgv);
words = brk_string(line, &wordCount, TRUE, &shellArgv);
memset(&newShell, 0, sizeof(newShell));
/*
* Parse the specification by keyword
*/
for (path = NULL, argc = wordCount - 1, argv = words;
argc != 0;
argc--, argv++) {
if (strncmp(*argv, "path=", 5) == 0) {
path = &argv[0][5];
} else if (strncmp(*argv, "name=", 5) == 0) {
newShell.name = &argv[0][5];
} else {
if (strncmp(*argv, "quiet=", 6) == 0) {
newShell.echoOff = &argv[0][6];
} else if (strncmp(*argv, "echo=", 5) == 0) {
newShell.echoOn = &argv[0][5];
} else if (strncmp(*argv, "filter=", 7) == 0) {
newShell.noPrint = &argv[0][7];
newShell.noPLen = strlen(newShell.noPrint);
} else if (strncmp(*argv, "echoFlag=", 9) == 0) {
newShell.echo = &argv[0][9];
} else if (strncmp(*argv, "errFlag=", 8) == 0) {
newShell.exit = &argv[0][8];
} else if (strncmp(*argv, "hasErrCtl=", 10) == 0) {
char c = argv[0][10];
newShell.hasErrCtl = !((c != 'Y') && (c != 'y') &&
(c != 'T') && (c != 't'));
} else if (strncmp(*argv, "check=", 6) == 0) {
newShell.errCheck = &argv[0][6];
} else if (strncmp(*argv, "ignore=", 7) == 0) {
newShell.ignErr = &argv[0][7];
} else {
Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"",
*argv);
free(words);
return(FAILURE);
}
fullSpec = TRUE;
}
}
if (path == NULL) {
/*
* If no path was given, the user wants one of the pre-defined shells,
* yes? So we find the one s/he wants with the help of JobMatchShell
* and set things up the right way. shellPath will be set up by
* Job_Init.
*/
if (newShell.name == NULL) {
Parse_Error(PARSE_FATAL, "Neither path nor name specified");
return(FAILURE);
} else {
commandShell = JobMatchShell(newShell.name);
shellName = newShell.name;
}
} else {
/*
* The user provided a path. If s/he gave nothing else (fullSpec is
* FALSE), try and find a matching shell in the ones we know of.
* Else we just take the specification at its word and copy it
* to a new location. In either case, we need to record the
* path the user gave for the shell.
*/
shellPath = path;
path = strrchr(path, '/');
if (path == NULL) {
path = shellPath;
} else {
path += 1;
}
if (newShell.name != NULL) {
shellName = newShell.name;
} else {
shellName = path;
}
if (!fullSpec) {
commandShell = JobMatchShell(shellName);
} else {
commandShell = (Shell *) emalloc(sizeof(Shell));
*commandShell = newShell;
}
}
if (commandShell->echoOn && commandShell->echoOff) {
commandShell->hasEchoCtl = TRUE;
}
if (!commandShell->hasErrCtl) {
if (commandShell->errCheck == NULL) {
commandShell->errCheck = "";
}
if (commandShell->ignErr == NULL) {
commandShell->ignErr = "%s\n";
}
}
/*
* Do not free up the words themselves, since they might be in use by the
* shell specification...
*/
free(words);
return SUCCESS;
}
/*-
*-----------------------------------------------------------------------
* JobInterrupt --
* Handle the receipt of an interrupt.
*
* Results:
* None
*
* Side Effects:
* All children are killed. Another job will be started if the
* .INTERRUPT target was given.
*-----------------------------------------------------------------------
*/
static void
JobInterrupt(runINTERRUPT, signo)
int runINTERRUPT; /* Non-zero if commands for the .INTERRUPT
* target should be executed */
int signo; /* signal received */
{
LstNode ln; /* element in job table */
Job *job; /* job descriptor in that element */
GNode *interrupt; /* the node describing the .INTERRUPT target */
aborting = ABORT_INTERRUPT;
(void) Lst_Open(&jobs);
while ((ln = Lst_Next(&jobs)) != NULL) {
job = (Job *) Lst_Datum(ln);
if (!Targ_Precious(job->node)) {
char *file = (job->node->path == NULL ?
job->node->name :
job->node->path);
if (!noExecute && eunlink(file) != -1) {
Error("*** %s removed", file);
}
}
#ifdef RMT_WANTS_SIGNALS
if (job->flags & JOB_REMOTE) {
/*
* If job is remote, let the Rmt module do the killing.
*/
if (!Rmt_Signal(job, signo)) {
/*
* If couldn't kill the thing, finish it out now with an
* error code, since no exit report will come in likely.
*/
int status;
status.w_status = 0;
status.w_retcode = 1;
JobFinish(job, &status);
}
} else if (job->pid) {
KILL(job->pid, signo);
}
#else
if (job->pid) {
if (DEBUG(JOB)) {
(void) fprintf(stdout,
"JobInterrupt passing signal to child %d.\n",
job->pid);
(void) fflush(stdout);
}
KILL(job->pid, signo);
}
#endif /* RMT_WANTS_SIGNALS */
}
#ifdef REMOTE
(void)Lst_Open(&stoppedJobs);
while ((ln = Lst_Next(&stoppedJobs)) != NULL) {
job = (Job *) Lst_Datum(ln);
if (job->flags & JOB_RESTART) {
if (DEBUG(JOB)) {
(void) fprintf(stdout, "%s%s",
"JobInterrupt skipping job on stopped queue",
"-- it was waiting to be restarted.\n");
(void) fflush(stdout);
}
continue;
}
if (!Targ_Precious(job->node)) {
char *file = (job->node->path == NULL ?
job->node->name :
job->node->path);
if (eunlink(file) == 0) {
Error("*** %s removed", file);
}
}
/*
* Resume the thing so it will take the signal.
*/
if (DEBUG(JOB)) {
(void) fprintf(stdout,
"JobInterrupt passing CONT to stopped child %d.\n",
job->pid);
(void) fflush(stdout);
}
KILL(job->pid, SIGCONT);
#ifdef RMT_WANTS_SIGNALS
if (job->flags & JOB_REMOTE) {
/*
* If job is remote, let the Rmt module do the killing.
*/
if (!Rmt_Signal(job, SIGINT)) {
/*
* If couldn't kill the thing, finish it out now with an
* error code, since no exit report will come in likely.
*/
int status;
status.w_status = 0;
status.w_retcode = 1;
JobFinish(job, &status);
}
} else if (job->pid) {
if (DEBUG(JOB)) {
(void) fprintf(stdout,
"JobInterrupt passing interrupt to stopped child %d.\n",
job->pid);
(void) fflush(stdout);
}
KILL(job->pid, SIGINT);
}
#endif /* RMT_WANTS_SIGNALS */
}
#endif
Lst_Close(&stoppedJobs);
if (runINTERRUPT && !touchFlag) {
interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
if (interrupt != NULL) {
ignoreErrors = FALSE;
JobStart(interrupt, JOB_IGNDOTS, (Job *)0);
while (nJobs) {
Job_CatchOutput();
#ifndef RMT_WILL_WATCH
Job_CatchChildren(!usePipes);
#endif /* RMT_WILL_WATCH */
}
}
}
exit(signo);
}
/*
*-----------------------------------------------------------------------
* Job_Finish --
* Do final processing such as the running of the commands
* attached to the .END target.
*
* Results:
* Number of errors reported.
*-----------------------------------------------------------------------
*/
int
Job_Finish()
{
if (postCommands != NULL && !Lst_IsEmpty(&postCommands->commands)) {
if (errors) {
Error("Errors reported so .END ignored");
} else {
JobStart(postCommands, JOB_SPECIAL | JOB_IGNDOTS, NULL);
while (nJobs) {
Job_CatchOutput();
#ifndef RMT_WILL_WATCH
Job_CatchChildren(!usePipes);
#endif /* RMT_WILL_WATCH */
}
}
}
return(errors);
}
/*-
*-----------------------------------------------------------------------
* Job_End --
* Cleanup any memory used by the jobs module
*
* Results:
* None.
*
* Side Effects:
* Memory is freed
*-----------------------------------------------------------------------
*/
void
Job_End()
{
#ifdef CLEANUP
efree(shellArgv);
#endif
}
/*-
*-----------------------------------------------------------------------
* Job_Wait --
* Waits for all running jobs to finish and returns. Sets 'aborting'
* to ABORT_WAIT to prevent other jobs from starting.
*
* Results:
* None.
*
* Side Effects:
* Currently running jobs finish.
*
*-----------------------------------------------------------------------
*/
void
Job_Wait()
{
aborting = ABORT_WAIT;
while (nJobs != 0) {
Job_CatchOutput();
#ifndef RMT_WILL_WATCH
Job_CatchChildren(!usePipes);
#endif /* RMT_WILL_WATCH */
}
aborting = 0;
}
/*-
*-----------------------------------------------------------------------
* Job_AbortAll --
* Abort all currently running jobs without handling output or anything.
* This function is to be called only in the event of a major
* error. Most definitely NOT to be called from JobInterrupt.
*
* Results:
* None
*
* Side Effects:
* All children are killed, not just the firstborn
*-----------------------------------------------------------------------
*/
void
Job_AbortAll()
{
LstNode ln; /* element in job table */
Job *job; /* the job descriptor in that element */
int foo;
aborting = ABORT_ERROR;
if (nJobs) {
(void) Lst_Open(&jobs);
while ((ln = Lst_Next(&jobs)) != NULL) {
job = (Job *) Lst_Datum(ln);
/*
* kill the child process with increasingly drastic signals to make
* darn sure it's dead.
*/
#ifdef RMT_WANTS_SIGNALS
if (job->flags & JOB_REMOTE) {
Rmt_Signal(job, SIGINT);
Rmt_Signal(job, SIGKILL);
} else {
KILL(job->pid, SIGINT);
KILL(job->pid, SIGKILL);
}
#else
KILL(job->pid, SIGINT);
KILL(job->pid, SIGKILL);
#endif /* RMT_WANTS_SIGNALS */
}
}
/*
* Catch as many children as want to report in at first, then give up
*/
while (waitpid((pid_t) -1, &foo, WNOHANG) > 0)
continue;
}
#ifdef REMOTE
/*-
*-----------------------------------------------------------------------
* JobFlagForMigration --
* Handle the eviction of a child. Called from RmtStatusChange.
* Flags the child as remigratable and then suspends it.
*
* Results:
* none.
*
* Side Effects:
* The job descriptor is flagged for remigration.
*
*-----------------------------------------------------------------------
*/
void
JobFlagForMigration(hostID)
int hostID; /* ID of host we used, for matching children. */
{
register Job *job; /* job descriptor for dead child */
LstNode jnode; /* list element for finding job */
if (DEBUG(JOB)) {
(void) fprintf(stdout, "JobFlagForMigration(%d) called.\n", hostID);
(void) fflush(stdout);
}
jnode = Lst_Find(&jobs, JobCmpRmtID, &hostID);
if (jnode == NULL) {
jnode = Lst_Find(&stoppedJobs, JobCmpRmtID, &hostID);
if (jnode == NULL) {
if (DEBUG(JOB)) {
Error("Evicting host(%d) not in table", hostID);
}
return;
}
}
job = (Job *) Lst_Datum(jnode);
if (DEBUG(JOB)) {
(void) fprintf(stdout,
"JobFlagForMigration(%d) found job '%s'.\n", hostID,
job->node->name);
(void) fflush(stdout);
}
KILL(job->pid, SIGSTOP);
job->flags |= JOB_REMIGRATE;
}
#endif
/*-
*-----------------------------------------------------------------------
* JobRestartJobs --
* Tries to restart stopped jobs if there are slots available.
* Note that this tries to restart them regardless of pending errors.
* It's not good to leave stopped jobs lying around!
*
* Results:
* None.
*
* Side Effects:
* Resumes(and possibly migrates) jobs.
*
*-----------------------------------------------------------------------
*/
static void
JobRestartJobs()
{
Job *job;
while (!jobFull && (job = (Job *)Lst_DeQueue(&stoppedJobs)) != NULL) {
if (DEBUG(JOB)) {
(void) fprintf(stdout,
"Job queue is not full. Restarting a stopped job.\n");
(void) fflush(stdout);
}
JobRestart(job);
}
}
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