770 lines
19 KiB
C
770 lines
19 KiB
C
/*-
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* Copyright (c) 1988, 1989, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1988, 1989 by Adam de Boor
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* Copyright (c) 1989 by Berkeley Softworks
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Adam de Boor.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)compat.c 8.2 (Berkeley) 3/19/94
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*-
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* compat.c --
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* The routines in this file implement the full-compatibility
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* mode of PMake. Most of the special functionality of PMake
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* is available in this mode. Things not supported:
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* - different shells.
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* - friendly variable substitution.
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*
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* Interface:
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* Compat_Run Initialize things for this module and recreate
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* thems as need creatin'
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*/
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <ctype.h>
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#include <errno.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "buf.h"
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#include "compat.h"
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#include "config.h"
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#include "dir.h"
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#include "globals.h"
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#include "GNode.h"
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#include "job.h"
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#include "make.h"
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#include "str.h"
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#include "suff.h"
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#include "targ.h"
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#include "util.h"
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#include "var.h"
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/*
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* The following array is used to make a fast determination of which
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* characters are interpreted specially by the shell. If a command
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* contains any of these characters, it is executed by the shell, not
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* directly by us.
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*/
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static char meta[256];
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static GNode *curTarg = NULL;
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static GNode *ENDNode;
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static sig_atomic_t interrupted;
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static const char *const sh_builtin[] = {
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"alias", "cd", "eval", "exec", "exit", "read", "set", "ulimit",
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"unalias", "umask", "unset", "wait", ":", NULL};
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static void
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CompatInit(void)
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{
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const char *cp; /* Pointer to string of shell meta-characters */
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for (cp = "#=|^(){};&<>*?[]:$`\\\n"; *cp != '\0'; cp++) {
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meta[(unsigned char)*cp] = 1;
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}
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/*
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* The null character serves as a sentinel in the string.
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*/
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meta[0] = 1;
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}
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/*
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* Interrupt handler - set flag and defer handling to the main code
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*/
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static void
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CompatCatchSig(int signo)
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{
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interrupted = signo;
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}
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/*-
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*-----------------------------------------------------------------------
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* CompatInterrupt --
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* Interrupt the creation of the current target and remove it if
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* it ain't precious.
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*
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* Results:
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* None.
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*
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* Side Effects:
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* The target is removed and the process exits. If .INTERRUPT exists,
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* its commands are run first WITH INTERRUPTS IGNORED..
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*
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*-----------------------------------------------------------------------
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*/
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static void
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CompatInterrupt(int signo)
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{
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GNode *gn;
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sigset_t nmask, omask;
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LstNode *ln;
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sigemptyset(&nmask);
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sigaddset(&nmask, SIGINT);
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sigaddset(&nmask, SIGTERM);
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sigaddset(&nmask, SIGHUP);
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sigaddset(&nmask, SIGQUIT);
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sigprocmask(SIG_SETMASK, &nmask, &omask);
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/* prevent recursion in evaluation of .INTERRUPT */
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interrupted = 0;
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if (curTarg != NULL && !Targ_Precious(curTarg)) {
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char *p1;
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char *file = Var_Value(TARGET, curTarg, &p1);
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if (!noExecute && eunlink(file) != -1) {
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printf("*** %s removed\n", file);
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}
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free(p1);
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}
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/*
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* Run .INTERRUPT only if hit with interrupt signal
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*/
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if (signo == SIGINT) {
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gn = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
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if (gn != NULL) {
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LST_FOREACH(ln, &gn->commands) {
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if (Compat_RunCommand(Lst_Datum(ln), gn))
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break;
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}
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}
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}
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sigprocmask(SIG_SETMASK, &omask, NULL);
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if (signo == SIGQUIT)
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exit(signo);
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signal(signo, SIG_DFL);
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kill(getpid(), signo);
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}
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/*-
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*-----------------------------------------------------------------------
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* shellneed --
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*
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* Results:
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* Returns 1 if a specified line must be executed by the shell,
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* and 0 if it can be run via execve.
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*
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* Side Effects:
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* Uses brk_string so destroys the contents of argv.
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*
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*-----------------------------------------------------------------------
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*/
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static int
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shellneed(char *cmd)
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{
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char **av;
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const char *const *p;
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int ac;
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av = brk_string(cmd, &ac, TRUE);
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for (p = sh_builtin; *p != 0; p++)
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if (strcmp(av[1], *p) == 0)
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return (1);
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return (0);
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}
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/*-
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*-----------------------------------------------------------------------
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* Compat_RunCommand --
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* Execute the next command for a target. If the command returns an
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* error, the node's made field is set to ERROR and creation stops.
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* The node from which the command came is also given.
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*
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* Results:
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* 0 if the command succeeded, 1 if an error occurred.
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*
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* Side Effects:
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* The node's 'made' field may be set to ERROR.
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*
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*-----------------------------------------------------------------------
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*/
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int
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Compat_RunCommand(char *cmd, GNode *gn)
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{
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char *cmdStart; /* Start of expanded command */
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char *cp;
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Boolean silent; /* Don't print command */
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Boolean doit; /* Execute even in -n */
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Boolean errCheck; /* Check errors */
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int reason; /* Reason for child's death */
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int status; /* Description of child's death */
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int cpid; /* Child actually found */
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ReturnStatus rstat; /* Status of fork */
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LstNode *cmdNode; /* Node where current command is located */
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char **av; /* Argument vector for thing to exec */
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char *cmd_save; /* saved cmd */
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/*
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* Avoid clobbered variable warnings by forcing the compiler
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* to ``unregister'' variables
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*/
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#if __GNUC__
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(void)&av;
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(void)&errCheck;
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#endif
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silent = gn->type & OP_SILENT;
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errCheck = !(gn->type & OP_IGNORE);
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doit = FALSE;
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cmdNode = Lst_Member(&gn->commands, cmd);
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cmdStart = Buf_Peel(Var_Subst(NULL, cmd, gn, FALSE));
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/*
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* brk_string will return an argv with a NULL in av[0], thus causing
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* execvp to choke and die horribly. Besides, how can we execute a null
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* command? In any case, we warn the user that the command expanded to
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* nothing (is this the right thing to do?).
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*/
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if (*cmdStart == '\0') {
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free(cmdStart);
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Error("%s expands to empty string", cmd);
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return (0);
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} else {
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cmd = cmdStart;
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}
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Lst_Replace(cmdNode, cmdStart);
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if ((gn->type & OP_SAVE_CMDS) && (gn != ENDNode)) {
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Lst_AtEnd(&ENDNode->commands, cmdStart);
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return (0);
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} else if (strcmp(cmdStart, "...") == 0) {
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gn->type |= OP_SAVE_CMDS;
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return (0);
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}
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while (*cmd == '@' || *cmd == '-' || *cmd == '+') {
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switch (*cmd) {
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case '@':
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silent = DEBUG(LOUD) ? FALSE : TRUE;
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break;
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case '-':
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errCheck = FALSE;
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break;
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case '+':
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doit = TRUE;
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if (!meta[0]) /* we came here from jobs */
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CompatInit();
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break;
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}
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cmd++;
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}
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while (isspace((unsigned char)*cmd))
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cmd++;
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/*
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* Search for meta characters in the command. If there are no meta
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* characters, there's no need to execute a shell to execute the
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* command.
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*/
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for (cp = cmd; !meta[(unsigned char)*cp]; cp++)
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continue;
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/*
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* Print the command before echoing if we're not supposed to be quiet
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* for this one. We also print the command if -n given, but not if '+'.
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*/
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if (!silent || (noExecute && !doit)) {
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printf("%s\n", cmd);
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fflush(stdout);
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}
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/*
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* If we're not supposed to execute any commands, this is as far as
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* we go...
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*/
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if (!doit && noExecute) {
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return (0);
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}
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if (*cp != '\0') {
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/*
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* If *cp isn't the null character, we hit a "meta" character
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* and need to pass the command off to the shell. We give the
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* shell the -e flag as well as -c if it's supposed to exit
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* when it hits an error.
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*/
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static char *shargv[4];
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shargv[0] = shellPath;
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shargv[1] = (errCheck ? "-ec" : "-c");
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shargv[2] = cmd;
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shargv[3] = NULL;
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av = shargv;
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} else if (shellneed(cmd)) {
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/*
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* This command must be passed by the shell for other reasons..
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* or.. possibly not at all.
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*/
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static char *shargv[4];
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shargv[0] = shellPath;
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shargv[1] = (errCheck ? "-ec" : "-c");
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shargv[2] = cmd;
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shargv[3] = NULL;
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av = shargv;
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} else {
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/*
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* No meta-characters, so no need to exec a shell. Break the
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* command into words to form an argument vector we can execute.
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* brk_string sticks our name in av[0], so we have to
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* skip over it...
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*/
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av = brk_string(cmd, NULL, TRUE);
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av += 1;
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}
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/*
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* Fork and execute the single command. If the fork fails, we abort.
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*/
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cpid = vfork();
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if (cpid < 0) {
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Fatal("Could not fork");
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}
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if (cpid == 0) {
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execvp(av[0], av);
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write(STDERR_FILENO, av[0], strlen(av[0]));
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write(STDERR_FILENO, ":", 1);
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write(STDERR_FILENO, strerror(errno), strlen(strerror(errno)));
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write(STDERR_FILENO, "\n", 1);
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_exit(1);
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}
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/*
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* we need to print out the command associated with this Gnode in
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* Targ_PrintCmd from Targ_PrintGraph when debugging at level g2,
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* in main(), Fatal() and DieHorribly(), therefore do not free it
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* when debugging.
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*/
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if (!DEBUG(GRAPH2)) {
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free(cmdStart);
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Lst_Replace(cmdNode, cmd_save);
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}
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/*
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* The child is off and running. Now all we can do is wait...
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*/
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while (1) {
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while ((rstat = wait(&reason)) != cpid) {
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if (interrupted || (rstat == -1 && errno != EINTR)) {
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break;
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}
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}
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if (interrupted)
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CompatInterrupt(interrupted);
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if (rstat > -1) {
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if (WIFSTOPPED(reason)) {
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status = WSTOPSIG(reason); /* stopped */
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} else if (WIFEXITED(reason)) {
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status = WEXITSTATUS(reason); /* exited */
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if (status != 0) {
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printf("*** Error code %d", status);
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}
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} else {
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status = WTERMSIG(reason); /* signaled */
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printf("*** Signal %d", status);
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}
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if (!WIFEXITED(reason) || status != 0) {
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if (errCheck) {
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gn->made = ERROR;
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if (keepgoing) {
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/*
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* Abort the current target,
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* but let others continue.
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*/
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printf(" (continuing)\n");
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}
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} else {
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/*
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* Continue executing commands for this
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* target. If we return 0, this will
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* happen...
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*/
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printf(" (ignored)\n");
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status = 0;
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}
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}
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break;
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} else {
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Fatal("error in wait: %d", rstat);
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/*NOTREACHED*/
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}
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}
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return (status);
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}
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/*-
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*-----------------------------------------------------------------------
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* CompatMake --
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* Make a target, given the parent, to abort if necessary.
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*
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* Results:
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* 0
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*
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* Side Effects:
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* If an error is detected and not being ignored, the process exits.
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*
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*-----------------------------------------------------------------------
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*/
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static int
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CompatMake(void *gnp, void *pgnp)
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{
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GNode *gn = gnp;
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GNode *pgn = pgnp;
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LstNode *ln;
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if (gn->type & OP_USE) {
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Make_HandleUse(gn, pgn);
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} else if (gn->made == UNMADE) {
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/*
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* First mark ourselves to be made, then apply whatever
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* transformations the suffix module thinks are necessary.
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* Once that's done, we can descend and make all our children.
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* If any of them has an error but the -k flag was given, our
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* 'make' field will be set FALSE again. This is our signal to
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* not attempt to do anything but abort our parent as well.
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*/
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gn->make = TRUE;
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gn->made = BEINGMADE;
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Suff_FindDeps(gn);
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Lst_ForEach(&gn->children, CompatMake, gn);
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if (!gn->make) {
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gn->made = ABORTED;
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pgn->make = FALSE;
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return (0);
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}
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if (Lst_Member(&gn->iParents, pgn) != NULL) {
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char *p1;
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Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), pgn);
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free(p1);
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}
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/*
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* All the children were made ok. Now cmtime contains the
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* modification time of the newest child, we need to find out
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* if we exist and when we were modified last. The criteria for
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* datedness are defined by the Make_OODate function.
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*/
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DEBUGF(MAKE, ("Examining %s...", gn->name));
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if (!Make_OODate(gn)) {
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gn->made = UPTODATE;
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DEBUGF(MAKE, ("up-to-date.\n"));
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return (0);
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} else {
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DEBUGF(MAKE, ("out-of-date.\n"));
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}
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/*
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* If the user is just seeing if something is out-of-date,
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* exit now to tell him/her "yes".
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*/
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if (queryFlag) {
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exit(1);
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}
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/*
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* We need to be re-made. We also have to make sure we've got
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* a $? variable. To be nice, we also define the $> variable
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* using Make_DoAllVar().
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*/
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Make_DoAllVar(gn);
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/*
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* Alter our type to tell if errors should be ignored or things
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* should not be printed so Compat_RunCommand knows what to do.
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*/
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if (Targ_Ignore(gn)) {
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gn->type |= OP_IGNORE;
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}
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if (Targ_Silent(gn)) {
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gn->type |= OP_SILENT;
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}
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if (Job_CheckCommands(gn, Fatal)) {
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/*
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* Our commands are ok, but we still have to worry
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* about the -t flag...
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*/
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if (!touchFlag) {
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curTarg = gn;
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LST_FOREACH(ln, &gn->commands) {
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if (Compat_RunCommand(Lst_Datum(ln),
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gn))
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break;
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}
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curTarg = NULL;
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} else {
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Job_Touch(gn, gn->type & OP_SILENT);
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}
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} else {
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gn->made = ERROR;
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}
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if (gn->made != ERROR) {
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/*
|
|
* 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) == 0) {
|
|
gn->mtime = now;
|
|
}
|
|
if (gn->cmtime > gn->mtime)
|
|
gn->mtime = gn->cmtime;
|
|
DEBUGF(MAKE, ("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 {
|
|
char *p1;
|
|
|
|
printf("\n\nStop in %s.\n",
|
|
Var_Value(".CURDIR", gn, &p1));
|
|
free(p1);
|
|
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) {
|
|
char *p1;
|
|
Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), pgn);
|
|
free(p1);
|
|
}
|
|
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;
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Compat_Run --
|
|
* Start making again, given a list of target nodes.
|
|
*
|
|
* Results:
|
|
* None.
|
|
*
|
|
* Side Effects:
|
|
* Guess what?
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
void
|
|
Compat_Run(Lst *targs)
|
|
{
|
|
GNode *gn = NULL; /* Current root target */
|
|
int errors; /* Number of targets not remade due to errors */
|
|
LstNode *ln;
|
|
|
|
CompatInit();
|
|
Shell_Init(); /* Set up shell. */
|
|
|
|
if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
|
|
signal(SIGINT, CompatCatchSig);
|
|
}
|
|
if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
|
|
signal(SIGTERM, CompatCatchSig);
|
|
}
|
|
if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
|
|
signal(SIGHUP, CompatCatchSig);
|
|
}
|
|
if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
|
|
signal(SIGQUIT, CompatCatchSig);
|
|
}
|
|
|
|
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_FOREACH(ln, &gn->commands) {
|
|
if (Compat_RunCommand(Lst_Datum(ln), gn))
|
|
break;
|
|
}
|
|
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 (!Lst_IsEmpty(targs)) {
|
|
gn = Lst_DeQueue(targs);
|
|
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_FOREACH(ln, &ENDNode->commands) {
|
|
if (Compat_RunCommand(Lst_Datum(ln), gn))
|
|
break;
|
|
}
|
|
}
|
|
}
|