File: [local] / src / usr.bin / make / compat.c (download)
Revision 1.35, Thu Sep 14 13:52:41 2000 UTC (23 years, 8 months ago) by espie
Branch: MAIN
CVS Tags: OPENBSD_2_9_BASE, OPENBSD_2_9, OPENBSD_2_8_BASE, OPENBSD_2_8
Changes since 1.34: +5 -6 lines
Introduce a few macros to handle timestamps in an abstract way.
Replace the time stamp hash in dir.c with an open hashing structure.
In doing so, remove some nasty casts, simplify code a bit:
Dir_MTime can return a modification time, since make does not make
a distinction between out-of-date and non-existent files.
|
/* $OpenBSD: compat.c,v 1.35 2000/09/14 13:52:41 espie Exp $ */
/* $NetBSD: compat.c,v 1.14 1996/11/06 17:59:01 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.
*/
/*-
* compat.c --
* The routines in this file implement the full-compatibility
* mode of PMake. Most of the special functionality of PMake
* is available in this mode. Things not supported:
* - different shells.
* - friendly variable substitution.
*
* Interface:
* Compat_Run Initialize things for this module and recreate
* thems as need creatin'
*/
#include <stddef.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <ctype.h>
#include <errno.h>
#include <signal.h>
#include "make.h"
#include "ohash.h"
#include "dir.h"
#include "job.h"
#ifndef lint
#if 0
static char sccsid[] = "@(#)compat.c 8.2 (Berkeley) 3/19/94";
#else
UNUSED
static char rcsid[] = "$OpenBSD: compat.c,v 1.35 2000/09/14 13:52:41 espie Exp $";
#endif
#endif /* not lint */
/*
* The following array is used to make a fast determination of which
* characters are interpreted specially by the shell. If a command
* contains any of these characters, it is executed by the shell, not
* directly by us.
*/
static char meta[256];
static GNode *curTarg = NULL;
static GNode *ENDNode;
static void CompatInterrupt __P((int));
static int CompatRunCommand __P((void *, void *));
static void CompatMake __P((void *, void *));
static int shellneed __P((char **av));
/*-
*-----------------------------------------------------------------------
* CompatInterrupt --
* Interrupt the creation of the current target and remove it if
* it ain't precious.
*
* Results:
* None.
*
* Side Effects:
* The target is removed and the process exits. If .INTERRUPT exists,
* its commands are run first WITH INTERRUPTS IGNORED..
*
*-----------------------------------------------------------------------
*/
static void
CompatInterrupt (signo)
int signo;
{
GNode *gn;
if ((curTarg != NULL) && !Targ_Precious (curTarg)) {
char *file = Varq_Value(TARGET_INDEX, curTarg);
if (!noExecute && eunlink(file) != -1) {
Error("*** %s removed\n", file);
}
/*
* Run .INTERRUPT only if hit with interrupt signal
*/
if (signo == SIGINT) {
gn = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
if (gn != NULL) {
Lst_Find(&gn->commands, CompatRunCommand, gn);
}
}
}
exit (signo);
}
/*-
*-----------------------------------------------------------------------
* shellneed --
*
* Results:
* Returns 1 if a specified set of arguments
* must be executed by the shell,
* 0 if it can be run via execve, and -1 if the command can be
* handled internally
*
* Side Effects:
* May modify the process umask
*
*-----------------------------------------------------------------------
*/
static int
shellneed (av)
char **av;
{
char *runsh[] = {
"alias", "cd", "eval", "exec", "exit", "read", "set", "ulimit",
"unalias", "unset", "wait",
NULL
};
char **p;
/* FIXME most of these ARE actual no-ops */
for (p = runsh; *p; p++)
if (strcmp(av[0], *p) == 0)
return (1);
if (strcmp(av[0], "umask") == 0) {
long umi;
char *ep = NULL;
mode_t um;
if (av[1] != NULL) {
umi = strtol(av[1], &ep, 8);
if (ep == NULL)
return (1);
um = umi;
}
else {
um = umask(0);
printf("%o\n", um);
}
(void) umask(um);
return (-1);
}
return (0);
}
/*-
*-----------------------------------------------------------------------
* CompatRunCommand --
* Execute the next command for a target. If the command returns an
* error, the node's made field is set to ERROR and creation stops.
*
* Results:
* 1 if the command succeeded, 0 if an error occurred.
*
* Side Effects:
* The node's 'made' field may be set to ERROR.
*
*-----------------------------------------------------------------------
*/
static int
CompatRunCommand (cmdp, gnp)
void *cmdp; /* Command to execute */
void *gnp; /* Node from which the command came */
{
char *cmdStart; /* Start of expanded command */
char *cp, *bp = NULL;
Boolean silent, /* Don't print command */
errCheck, /* Check errors */
doExecute; /* Execute the command */
int reason; /* Reason for child's death */
int status; /* Description of child's death */
int cpid; /* Child actually found */
ReturnStatus stat; /* Status of fork */
LstNode cmdNode; /* Node where current command is located */
char **av; /* Argument vector for thing to exec */
int argc; /* Number of arguments in av or 0 if not
* dynamically allocated */
Boolean local; /* TRUE if command should be executed
* locally */
char *cmd = (char *) cmdp;
GNode *gn = (GNode *) gnp;
static char *shargv[4] = { "/bin/sh" };
/*
* Avoid clobbered variable warnings by forcing the compiler
* to ``unregister'' variables
*/
#if __GNUC__
(void) &av;
(void) &errCheck;
#endif
silent = gn->type & OP_SILENT;
errCheck = !(gn->type & OP_IGNORE);
doExecute = !noExecute;
cmdNode = Lst_Member(&gn->commands, cmd);
cmdStart = Var_Subst(cmd, &gn->context, FALSE);
/*
* brk_string will return an argv with a NULL in av[0], thus causing
* execvp to choke and die horribly. Besides, how can we execute a null
* command? In any case, we warn the user that the command expanded to
* nothing (is this the right thing to do?).
*/
if (*cmdStart == '\0') {
free(cmdStart);
Error("%s expands to empty string", cmd);
return 1;
} else {
cmd = cmdStart;
}
Lst_Replace(cmdNode, cmdStart);
if ((gn->type & OP_SAVE_CMDS) && (gn != ENDNode)) {
Lst_AtEnd(&ENDNode->commands, cmdStart);
return 1;
} else if (strcmp(cmdStart, "...") == 0) {
gn->type |= OP_SAVE_CMDS;
return 1;
}
for (;; cmd++) {
if (*cmd == '@')
silent = TRUE;
else if (*cmd == '-')
errCheck = FALSE;
else if (*cmd == '+')
doExecute = TRUE;
else
break;
}
while (isspace((unsigned char)*cmd))
cmd++;
/*
* Search for meta characters in the command. If there are no meta
* characters, there's no need to execute a shell to execute the
* command.
*/
for (cp = cmd; !meta[(unsigned char)*cp]; cp++) {
continue;
}
/*
* Print the command before echoing if we're not supposed to be quiet for
* this one. We also print the command if -n given.
*/
if (!silent || noExecute) {
printf ("%s\n", cmd);
fflush(stdout);
}
/*
* If we're not supposed to execute any commands, this is as far as
* we go...
*/
if (!doExecute)
return 1;
if (*cp != '\0') {
/*
* If *cp isn't the null character, we hit a "meta" character and
* need to pass the command off to the shell. We give the shell the
* -e flag as well as -c if it's supposed to exit when it hits an
* error.
*/
shargv[1] = (errCheck ? "-ec" : "-c");
shargv[2] = cmd;
shargv[3] = (char *)NULL;
av = shargv;
argc = 0;
} else {
/*
* No meta-characters, so probably no need to exec a shell.
* Break the command into words to form an argument vector
* we can execute.
*/
av = brk_string(cmd, &argc, TRUE, &bp);
switch(shellneed(av)) {
case -1: /* handled internally */
free(bp);
free(av);
return 1;
case 1:
shargv[1] = (errCheck ? "-ec" : "-c");
shargv[2] = cmd;
shargv[3] = (char *)NULL;
free(bp);
free(av);
bp = NULL;
av = shargv;
argc = 0;
break;
default: /* nothing needed */
break;
}
}
local = TRUE;
/*
* Fork and execute the single command. If the fork fails, we abort.
*/
cpid = vfork();
if (cpid < 0) {
Fatal("Could not fork");
}
if (cpid == 0) {
if (local) {
execvp(av[0], av);
if (errno == ENOENT)
fprintf(stderr, "%s: not found\n", av[0]);
else
perror(av[0]);
} else {
(void)execv(av[0], av);
}
_exit(1);
}
if (bp) {
free(av);
free(bp);
}
free(cmdStart);
Lst_Replace(cmdNode, NULL);
/*
* The child is off and running. Now all we can do is wait...
*/
while (1) {
while ((stat = wait(&reason)) != cpid) {
if (stat == -1 && errno != EINTR) {
break;
}
}
if (stat > -1) {
if (WIFSTOPPED(reason)) {
status = WSTOPSIG(reason); /* stopped */
} else if (WIFEXITED(reason)) {
status = WEXITSTATUS(reason); /* exited */
if (status != 0) {
printf ("*** Error code %d", status);
}
} else {
status = WTERMSIG(reason); /* signaled */
printf ("*** Signal %d", status);
}
if (!WIFEXITED(reason) || (status != 0)) {
if (errCheck) {
gn->made = ERROR;
if (keepgoing) {
/*
* Abort the current target, but let others
* continue.
*/
printf (" (continuing)\n");
}
} else {
/*
* Continue executing commands for this target.
* If we return 0, this will happen...
*/
printf (" (ignored)\n");
status = 0;
}
}
break;
} else {
Fatal ("error in wait: %d", stat);
/*NOTREACHED*/
}
}
return !status;
}
/*-
*-----------------------------------------------------------------------
* CompatMake --
* Make a target.
*
* Side Effects:
* If an error is detected and not being ignored, the process exits.
*
*-----------------------------------------------------------------------
*/
static void
CompatMake(gnp, pgnp)
void *gnp; /* The node to make */
void *pgnp; /* Parent to abort if necessary */
{
GNode *gn = (GNode *) gnp;
GNode *pgn = (GNode *) pgnp;
if (pgn->type & OP_MADE) {
(void)Dir_MTime(gn);
gn->made = UPTODATE;
}
if (gn->type & OP_USE) {
Make_HandleUse(gn, pgn);
} else if (gn->made == UNMADE) {
/*
* First mark ourselves to be made, then apply whatever transformations
* the suffix module thinks are necessary. Once that's done, we can
* descend and make all our children. If any of them has an error
* but the -k flag was given, our 'make' field will be set FALSE again.
* This is our signal to not attempt to do anything but abort our
* parent as well.
*/
gn->make = TRUE;
gn->made = BEINGMADE;
Suff_FindDeps (gn);
Lst_ForEach(&gn->children, CompatMake, gn);
if (!gn->make) {
gn->made = ABORTED;
pgn->make = FALSE;
return;
}
if (Lst_Member(&gn->iParents, pgn) != NULL)
Varq_Set(IMPSRC_INDEX, Varq_Value(TARGET_INDEX, gn), pgn);
/*
* All the children were made ok. Now cmtime contains the modification
* time of the newest child, we need to find out if we exist and when
* we were modified last. The criteria for datedness are defined by the
* Make_OODate function.
*/
if (DEBUG(MAKE)) {
printf("Examining %s...", gn->name);
}
if (! Make_OODate(gn)) {
gn->made = UPTODATE;
if (DEBUG(MAKE)) {
printf("up-to-date.\n");
}
return;
} else if (DEBUG(MAKE)) {
printf("out-of-date.\n");
}
/*
* If the user is just seeing if something is out-of-date, exit now
* to tell him/her "yes".
*/
if (queryFlag) {
exit (-1);
}
/*
* We need to be re-made. We also have to make sure we've got a $?
* variable. To be nice, we also define the $> variable using
* Make_DoAllVar().
*/
Make_DoAllVar(gn);
/*
* Alter our type to tell if errors should be ignored or things
* should not be printed so CompatRunCommand knows what to do.
*/
if (Targ_Ignore (gn)) {
gn->type |= OP_IGNORE;
}
if (Targ_Silent (gn)) {
gn->type |= OP_SILENT;
}
if (Job_CheckCommands (gn, Fatal)) {
/*
* Our commands are ok, but we still have to worry about the -t
* flag...
*/
if (!touchFlag) {
curTarg = gn;
Lst_Find(&gn->commands, CompatRunCommand, gn);
curTarg = NULL;
} else {
Job_Touch (gn, gn->type & OP_SILENT);
}
} else {
gn->made = ERROR;
}
if (gn->made != ERROR) {
/*
* If the node was made successfully, mark it so, update
* its modification time and timestamp all its parents. Note
* that for .ZEROTIME targets, the timestamping isn't done.
* This is to keep its state from affecting that of its parent.
*/
gn->made = MADE;
#ifndef RECHECK
/*
* We can't re-stat the thing, but we can at least take care of
* rules where a target depends on a source that actually creates
* the target, but only if it has changed, e.g.
*
* parse.h : parse.o
*
* parse.o : parse.y
* yacc -d parse.y
* cc -c y.tab.c
* mv y.tab.o parse.o
* cmp -s y.tab.h parse.h || mv y.tab.h parse.h
*
* In this case, if the definitions produced by yacc haven't
* changed from before, parse.h won't have been updated and
* gn->mtime will reflect the current modification time for
* parse.h. This is something of a kludge, I admit, but it's a
* useful one..
*
* XXX: People like to use a rule like
*
* FRC:
*
* To force things that depend on FRC to be made, so we have to
* check for gn->children being empty as well...
*/
if (!Lst_IsEmpty(&gn->commands) || Lst_IsEmpty(&gn->children)) {
gn->mtime = now;
}
#else
/*
* This is what Make does and it's actually a good thing, as it
* allows rules like
*
* cmp -s y.tab.h parse.h || cp y.tab.h parse.h
*
* to function as intended. Unfortunately, thanks to the stateless
* nature of NFS (and the speed of this program), there are times
* when the modification time of a file created on a remote
* machine will not be modified before the stat() implied by
* the Dir_MTime occurs, thus leading us to believe that the file
* is unchanged, wreaking havoc with files that depend on this one.
*
* I have decided it is better to make too much than to make too
* little, so this stuff is commented out unless you're sure it's
* ok.
* -- ardeb 1/12/88
*/
if (noExecute || is_out_of_date(Dir_MTime(gn)))
gn->mtime = now;
if (is_before(gn->mtime, gn->cmtime))
gn->mtime = gn->cmtime;
if (DEBUG(MAKE)) {
printf("update time: %s\n", Targ_FmtTime(gn->mtime));
}
#endif
if (!(gn->type & OP_EXEC)) {
pgn->childMade = TRUE;
Make_TimeStamp(pgn, gn);
}
} else if (keepgoing) {
pgn->make = FALSE;
} else {
if (gn->lineno)
printf("\n\nStop in %s (line %lu of %s).\n",
Var_Value(".CURDIR", VAR_GLOBAL),
(unsigned long)gn->lineno,
gn->fname);
else
printf("\n\nStop in %s.\n", Var_Value(".CURDIR", VAR_GLOBAL));
exit (1);
}
} else if (gn->made == ERROR) {
/*
* Already had an error when making this beastie. Tell the parent
* to abort.
*/
pgn->make = FALSE;
} else {
if (Lst_Member(&gn->iParents, pgn) != NULL)
Varq_Set(IMPSRC_INDEX, Varq_Value(TARGET_INDEX, gn), pgn);
switch(gn->made) {
case BEINGMADE:
Error("Graph cycles through %s\n", gn->name);
gn->made = ERROR;
pgn->make = FALSE;
break;
case MADE:
if ((gn->type & OP_EXEC) == 0) {
pgn->childMade = TRUE;
Make_TimeStamp(pgn, gn);
}
break;
case UPTODATE:
if ((gn->type & OP_EXEC) == 0) {
Make_TimeStamp(pgn, gn);
}
break;
default:
break;
}
}
}
/*-
*-----------------------------------------------------------------------
* Compat_Run --
* Initialize this mode and start making.
*
* Results:
* None.
*
* Side Effects:
* Guess what?
*
*-----------------------------------------------------------------------
*/
void
Compat_Run(targs)
Lst targs; /* List of target nodes to re-create */
{
char *cp; /* Pointer to string of shell meta-characters */
GNode *gn = NULL;/* Current root target */
int errors; /* Number of targets not remade due to errors */
if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
signal(SIGINT, CompatInterrupt);
}
if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
signal(SIGTERM, CompatInterrupt);
}
if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
signal(SIGHUP, CompatInterrupt);
}
if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
signal(SIGQUIT, CompatInterrupt);
}
for (cp = "#=|^(){};&<>*?[]:$`\\\n"; *cp != '\0'; cp++) {
meta[(unsigned char) *cp] = 1;
}
/*
* The null character serves as a sentinel in the string.
*/
meta[0] = 1;
ENDNode = Targ_FindNode(".END", TARG_CREATE);
/*
* If the user has defined a .BEGIN target, execute the commands attached
* to it.
*/
if (!queryFlag) {
gn = Targ_FindNode(".BEGIN", TARG_NOCREATE);
if (gn != NULL) {
Lst_Find(&gn->commands, CompatRunCommand, gn);
if (gn->made == ERROR) {
printf("\n\nStop.\n");
exit(1);
}
}
}
/*
* For each entry in the list of targets to create, call CompatMake on
* it to create the thing. CompatMake will leave the 'made' field of gn
* in one of several states:
* UPTODATE gn was already up-to-date
* MADE gn was recreated successfully
* ERROR An error occurred while gn was being created
* ABORTED gn was not remade because one of its inferiors
* could not be made due to errors.
*/
errors = 0;
while ((gn = (GNode *)Lst_DeQueue(targs)) != NULL) {
CompatMake(gn, gn);
if (gn->made == UPTODATE) {
printf ("`%s' is up to date.\n", gn->name);
} else if (gn->made == ABORTED) {
printf ("`%s' not remade because of errors.\n", gn->name);
errors += 1;
}
}
/*
* If the user has defined a .END target, run its commands.
*/
if (errors == 0) {
Lst_Find(&ENDNode->commands, CompatRunCommand, gn);
}
}
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