File: [local] / src / usr.bin / make / compat.c (download)
Revision 1.28, Sat Jun 17 14:38:14 2000 UTC (23 years, 11 months ago) by espie
Branch: MAIN
Changes since 1.27: +12 -12 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: compat.c,v 1.28 2000/06/17 14:38:14 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.
*/
#ifndef lint
#if 0
static char sccsid[] = "@(#)compat.c 8.2 (Berkeley) 3/19/94";
#else
static char rcsid[] = "$OpenBSD: compat.c,v 1.28 2000/06/17 14:38:14 espie Exp $";
#endif
#endif /* not lint */
/*-
* 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 <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 "hash.h"
#include "dir.h"
#include "job.h"
/*
* 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 = Var_Value(TARGET, 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 */
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);
cmdNode = Lst_Member(&gn->commands, cmd);
cmdStart = Var_Subst(cmd, gn, 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;
}
while ((*cmd == '@') || (*cmd == '-')) {
if (*cmd == '@') {
silent = TRUE;
} else {
errCheck = FALSE;
}
cmd++;
}
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 (noExecute)
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) {
Var_Set(IMPSRC, Var_Value(TARGET, 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 || Dir_MTime(gn) == FALSE) {
gn->mtime = now;
}
if (gn->cmtime > gn->mtime)
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", gn),
(unsigned long)gn->lineno,
gn->fname);
else
printf("\n\nStop in %s.\n", Var_Value(".CURDIR", gn));
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)
Var_Set (IMPSRC, Var_Value(TARGET, 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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