3bebe7293b
Archive member handling works again meta mode, treat missing reads as for writes. Update dirdeps.mk - much improved startup time. Update meta.stage.mk - avoid ln when chmod required.
1463 lines
34 KiB
C
1463 lines
34 KiB
C
/* $NetBSD: meta.c,v 1.54 2016/03/11 07:01:21 sjg Exp $ */
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/*
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* Implement 'meta' mode.
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* Adapted from John Birrell's patches to FreeBSD make.
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* --sjg
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*/
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/*
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* Copyright (c) 2009-2016, Juniper Networks, Inc.
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* Portions Copyright (c) 2009, John Birrell.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if defined(USE_META)
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#ifdef HAVE_LIBGEN_H
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#include <libgen.h>
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#elif !defined(HAVE_DIRNAME)
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char * dirname(char *);
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#endif
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#include <errno.h>
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#if !defined(HAVE_CONFIG_H) || defined(HAVE_ERR_H)
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#include <err.h>
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#endif
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#include "make.h"
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#include "job.h"
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#ifdef HAVE_FILEMON_H
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# include <filemon.h>
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#endif
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#if !defined(USE_FILEMON) && defined(FILEMON_SET_FD)
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# define USE_FILEMON
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#endif
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static BuildMon Mybm; /* for compat */
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static Lst metaBailiwick; /* our scope of control */
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static char *metaBailiwickStr; /* string storage for the list */
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static Lst metaIgnorePaths; /* paths we deliberately ignore */
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static char *metaIgnorePathsStr; /* string storage for the list */
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#ifndef MAKE_META_IGNORE_PATHS
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#define MAKE_META_IGNORE_PATHS ".MAKE.META.IGNORE_PATHS"
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#endif
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Boolean useMeta = FALSE;
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static Boolean useFilemon = FALSE;
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static Boolean writeMeta = FALSE;
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static Boolean metaEnv = FALSE; /* don't save env unless asked */
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static Boolean metaVerbose = FALSE;
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static Boolean metaIgnoreCMDs = FALSE; /* ignore CMDs in .meta files */
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static Boolean metaCurdirOk = FALSE; /* write .meta in .CURDIR Ok? */
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static Boolean metaSilent = FALSE; /* if we have a .meta be SILENT */
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extern Boolean forceJobs;
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extern Boolean comatMake;
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extern char **environ;
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#define MAKE_META_PREFIX ".MAKE.META.PREFIX"
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#ifndef N2U
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# define N2U(n, u) (((n) + ((u) - 1)) / (u))
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#endif
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#ifndef ROUNDUP
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# define ROUNDUP(n, u) (N2U((n), (u)) * (u))
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#endif
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#if !defined(HAVE_STRSEP)
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# define strsep(s, d) stresep((s), (d), 0)
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#endif
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/*
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* Filemon is a kernel module which snoops certain syscalls.
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*
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* C chdir
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* E exec
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* F [v]fork
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* L [sym]link
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* M rename
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* R read
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* W write
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* S stat
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*
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* See meta_oodate below - we mainly care about 'E' and 'R'.
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*
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* We can still use meta mode without filemon, but
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* the benefits are more limited.
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*/
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#ifdef USE_FILEMON
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# ifndef _PATH_FILEMON
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# define _PATH_FILEMON "/dev/filemon"
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# endif
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/*
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* Open the filemon device.
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*/
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static void
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filemon_open(BuildMon *pbm)
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{
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int retry;
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pbm->mon_fd = pbm->filemon_fd = -1;
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if (!useFilemon)
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return;
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for (retry = 5; retry >= 0; retry--) {
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if ((pbm->filemon_fd = open(_PATH_FILEMON, O_RDWR)) >= 0)
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break;
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}
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if (pbm->filemon_fd < 0) {
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useFilemon = FALSE;
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warn("Could not open %s", _PATH_FILEMON);
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return;
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}
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/*
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* We use a file outside of '.'
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* to avoid a FreeBSD kernel bug where unlink invalidates
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* cwd causing getcwd to do a lot more work.
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* We only care about the descriptor.
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*/
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pbm->mon_fd = mkTempFile("filemon.XXXXXX", NULL);
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if (ioctl(pbm->filemon_fd, FILEMON_SET_FD, &pbm->mon_fd) < 0) {
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err(1, "Could not set filemon file descriptor!");
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}
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/* we don't need these once we exec */
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(void)fcntl(pbm->mon_fd, F_SETFD, FD_CLOEXEC);
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(void)fcntl(pbm->filemon_fd, F_SETFD, FD_CLOEXEC);
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}
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/*
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* Read the build monitor output file and write records to the target's
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* metadata file.
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*/
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static void
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filemon_read(FILE *mfp, int fd)
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{
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char buf[BUFSIZ];
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int n;
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/* Check if we're not writing to a meta data file.*/
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if (mfp == NULL) {
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if (fd >= 0)
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close(fd); /* not interested */
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return;
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}
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/* rewind */
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(void)lseek(fd, (off_t)0, SEEK_SET);
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fprintf(mfp, "\n-- filemon acquired metadata --\n");
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while ((n = read(fd, buf, sizeof(buf))) > 0) {
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fwrite(buf, 1, n, mfp);
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}
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fflush(mfp);
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close(fd);
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}
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#endif
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/*
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* when realpath() fails,
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* we use this, to clean up ./ and ../
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*/
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static void
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eat_dots(char *buf, size_t bufsz, int dots)
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{
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char *cp;
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char *cp2;
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const char *eat;
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size_t eatlen;
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switch (dots) {
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case 1:
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eat = "/./";
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eatlen = 2;
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break;
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case 2:
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eat = "/../";
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eatlen = 3;
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break;
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default:
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return;
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}
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do {
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cp = strstr(buf, eat);
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if (cp) {
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cp2 = cp + eatlen;
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if (dots == 2 && cp > buf) {
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do {
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cp--;
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} while (cp > buf && *cp != '/');
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}
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if (*cp == '/') {
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strlcpy(cp, cp2, bufsz - (cp - buf));
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} else {
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return; /* can't happen? */
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}
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}
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} while (cp);
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}
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static char *
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meta_name(struct GNode *gn, char *mname, size_t mnamelen,
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const char *dname,
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const char *tname)
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{
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char buf[MAXPATHLEN];
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char cwd[MAXPATHLEN];
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char *rp;
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char *cp;
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char *tp;
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char *p[4]; /* >= number of possible uses */
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int i;
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i = 0;
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if (!dname)
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dname = Var_Value(".OBJDIR", gn, &p[i++]);
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if (!tname)
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tname = Var_Value(TARGET, gn, &p[i++]);
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if (realpath(dname, cwd))
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dname = cwd;
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/*
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* Weed out relative paths from the target file name.
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* We have to be careful though since if target is a
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* symlink, the result will be unstable.
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* So we use realpath() just to get the dirname, and leave the
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* basename as given to us.
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*/
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if ((cp = strrchr(tname, '/'))) {
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if (realpath(tname, buf)) {
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if ((rp = strrchr(buf, '/'))) {
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rp++;
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cp++;
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if (strcmp(cp, rp) != 0)
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strlcpy(rp, cp, sizeof(buf) - (rp - buf));
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}
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tname = buf;
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} else {
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/*
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* We likely have a directory which is about to be made.
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* We pretend realpath() succeeded, to have a chance
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* of generating the same meta file name that we will
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* next time through.
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*/
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if (tname[0] == '/') {
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strlcpy(buf, tname, sizeof(buf));
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} else {
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snprintf(buf, sizeof(buf), "%s/%s", cwd, tname);
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}
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eat_dots(buf, sizeof(buf), 1); /* ./ */
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eat_dots(buf, sizeof(buf), 2); /* ../ */
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tname = buf;
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}
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}
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/* on some systems dirname may modify its arg */
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tp = bmake_strdup(tname);
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if (strcmp(dname, dirname(tp)) == 0)
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snprintf(mname, mnamelen, "%s.meta", tname);
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else {
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snprintf(mname, mnamelen, "%s/%s.meta", dname, tname);
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/*
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* Replace path separators in the file name after the
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* current object directory path.
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*/
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cp = mname + strlen(dname) + 1;
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while (*cp != '\0') {
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if (*cp == '/')
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*cp = '_';
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cp++;
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}
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}
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free(tp);
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for (i--; i >= 0; i--) {
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free(p[i]);
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}
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return (mname);
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}
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/*
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* Return true if running ${.MAKE}
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* Bypassed if target is flagged .MAKE
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*/
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static int
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is_submake(void *cmdp, void *gnp)
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{
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static char *p_make = NULL;
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static int p_len;
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char *cmd = cmdp;
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GNode *gn = gnp;
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char *mp = NULL;
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char *cp;
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char *cp2;
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int rc = 0; /* keep looking */
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if (!p_make) {
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p_make = Var_Value(".MAKE", gn, &cp);
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p_len = strlen(p_make);
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}
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cp = strchr(cmd, '$');
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if ((cp)) {
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mp = Var_Subst(NULL, cmd, gn, VARF_WANTRES);
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cmd = mp;
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}
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cp2 = strstr(cmd, p_make);
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if ((cp2)) {
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switch (cp2[p_len]) {
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case '\0':
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case ' ':
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case '\t':
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case '\n':
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rc = 1;
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break;
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}
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if (cp2 > cmd && rc > 0) {
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switch (cp2[-1]) {
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case ' ':
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case '\t':
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case '\n':
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break;
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default:
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rc = 0; /* no match */
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break;
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}
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}
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}
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free(mp);
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return (rc);
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}
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typedef struct meta_file_s {
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FILE *fp;
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GNode *gn;
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} meta_file_t;
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static int
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printCMD(void *cmdp, void *mfpp)
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{
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meta_file_t *mfp = mfpp;
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char *cmd = cmdp;
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char *cp = NULL;
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if (strchr(cmd, '$')) {
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cmd = cp = Var_Subst(NULL, cmd, mfp->gn, VARF_WANTRES);
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}
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fprintf(mfp->fp, "CMD %s\n", cmd);
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free(cp);
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return 0;
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}
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/*
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* Certain node types never get a .meta file
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*/
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#define SKIP_META_TYPE(_type) do { \
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if ((gn->type & __CONCAT(OP_, _type))) { \
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if (DEBUG(META)) { \
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fprintf(debug_file, "Skipping meta for %s: .%s\n", \
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gn->name, __STRING(_type)); \
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} \
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return (NULL); \
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} \
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} while (0)
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static FILE *
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meta_create(BuildMon *pbm, GNode *gn)
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{
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meta_file_t mf;
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char buf[MAXPATHLEN];
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char objdir[MAXPATHLEN];
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char **ptr;
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const char *dname;
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const char *tname;
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char *fname;
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const char *cp;
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char *p[4]; /* >= possible uses */
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int i;
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struct stat fs;
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/* This may be a phony node which we don't want meta data for... */
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/* Skip .meta for .BEGIN, .END, .ERROR etc as well. */
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/* Or it may be explicitly flagged as .NOMETA */
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SKIP_META_TYPE(NOMETA);
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/* Unless it is explicitly flagged as .META */
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if (!(gn->type & OP_META)) {
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SKIP_META_TYPE(PHONY);
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SKIP_META_TYPE(SPECIAL);
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SKIP_META_TYPE(MAKE);
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}
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mf.fp = NULL;
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i = 0;
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dname = Var_Value(".OBJDIR", gn, &p[i++]);
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tname = Var_Value(TARGET, gn, &p[i++]);
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/* The object directory may not exist. Check it.. */
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if (stat(dname, &fs) != 0) {
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if (DEBUG(META))
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fprintf(debug_file, "Skipping meta for %s: no .OBJDIR\n",
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gn->name);
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goto out;
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}
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/* Check if there are no commands to execute. */
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if (Lst_IsEmpty(gn->commands)) {
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if (DEBUG(META))
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fprintf(debug_file, "Skipping meta for %s: no commands\n",
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gn->name);
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goto out;
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}
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/* make sure these are canonical */
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if (realpath(dname, objdir))
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dname = objdir;
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/* If we aren't in the object directory, don't create a meta file. */
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if (!metaCurdirOk && strcmp(curdir, dname) == 0) {
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if (DEBUG(META))
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fprintf(debug_file, "Skipping meta for %s: .OBJDIR == .CURDIR\n",
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gn->name);
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goto out;
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}
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if (!(gn->type & OP_META)) {
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/* We do not generate .meta files for sub-makes */
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if (Lst_ForEach(gn->commands, is_submake, gn)) {
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if (DEBUG(META))
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fprintf(debug_file, "Skipping meta for %s: .MAKE\n",
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gn->name);
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goto out;
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}
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}
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if (metaVerbose) {
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char *mp;
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/* Describe the target we are building */
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mp = Var_Subst(NULL, "${" MAKE_META_PREFIX "}", gn, VARF_WANTRES);
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if (*mp)
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fprintf(stdout, "%s\n", mp);
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free(mp);
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}
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/* Get the basename of the target */
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if ((cp = strrchr(tname, '/')) == NULL) {
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cp = tname;
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} else {
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cp++;
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}
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|
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fflush(stdout);
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|
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if (!writeMeta)
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/* Don't create meta data. */
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goto out;
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fname = meta_name(gn, pbm->meta_fname, sizeof(pbm->meta_fname),
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dname, tname);
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|
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#ifdef DEBUG_META_MODE
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if (DEBUG(META))
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fprintf(debug_file, "meta_create: %s\n", fname);
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#endif
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|
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if ((mf.fp = fopen(fname, "w")) == NULL)
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err(1, "Could not open meta file '%s'", fname);
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|
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fprintf(mf.fp, "# Meta data file %s\n", fname);
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|
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mf.gn = gn;
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Lst_ForEach(gn->commands, printCMD, &mf);
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|
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fprintf(mf.fp, "CWD %s\n", getcwd(buf, sizeof(buf)));
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fprintf(mf.fp, "TARGET %s\n", tname);
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|
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if (metaEnv) {
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for (ptr = environ; *ptr != NULL; ptr++)
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fprintf(mf.fp, "ENV %s\n", *ptr);
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}
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|
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fprintf(mf.fp, "-- command output --\n");
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fflush(mf.fp);
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|
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Var_Append(".MAKE.META.FILES", fname, VAR_GLOBAL);
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Var_Append(".MAKE.META.CREATED", fname, VAR_GLOBAL);
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|
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gn->type |= OP_META; /* in case anyone wants to know */
|
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if (metaSilent) {
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gn->type |= OP_SILENT;
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}
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out:
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for (i--; i >= 0; i--) {
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free(p[i]);
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}
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|
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return (mf.fp);
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}
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|
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static Boolean
|
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boolValue(char *s)
|
|
{
|
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switch(*s) {
|
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case '0':
|
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case 'N':
|
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case 'n':
|
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case 'F':
|
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case 'f':
|
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return FALSE;
|
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}
|
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return TRUE;
|
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}
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|
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/*
|
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* Initialization we need before reading makefiles.
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*/
|
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void
|
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meta_init(void)
|
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{
|
|
#ifdef USE_FILEMON
|
|
/* this allows makefiles to test if we have filemon support */
|
|
Var_Set(".MAKE.PATH_FILEMON", _PATH_FILEMON, VAR_GLOBAL, 0);
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
* Initialization we need after reading makefiles.
|
|
*/
|
|
void
|
|
meta_mode_init(const char *make_mode)
|
|
{
|
|
static int once = 0;
|
|
char *cp;
|
|
|
|
useMeta = TRUE;
|
|
useFilemon = TRUE;
|
|
writeMeta = TRUE;
|
|
|
|
if (make_mode) {
|
|
if (strstr(make_mode, "env"))
|
|
metaEnv = TRUE;
|
|
if (strstr(make_mode, "verb"))
|
|
metaVerbose = TRUE;
|
|
if (strstr(make_mode, "read"))
|
|
writeMeta = FALSE;
|
|
if (strstr(make_mode, "nofilemon"))
|
|
useFilemon = FALSE;
|
|
if ((cp = strstr(make_mode, "curdirok="))) {
|
|
metaCurdirOk = boolValue(&cp[9]);
|
|
}
|
|
if ((cp = strstr(make_mode, "silent="))) {
|
|
metaSilent = boolValue(&cp[7]);
|
|
}
|
|
if (strstr(make_mode, "ignore-cmd"))
|
|
metaIgnoreCMDs = TRUE;
|
|
/* for backwards compatability */
|
|
Var_Set(".MAKE.META_CREATED", "${.MAKE.META.CREATED}", VAR_GLOBAL, 0);
|
|
Var_Set(".MAKE.META_FILES", "${.MAKE.META.FILES}", VAR_GLOBAL, 0);
|
|
}
|
|
if (metaVerbose && !Var_Exists(MAKE_META_PREFIX, VAR_GLOBAL)) {
|
|
/*
|
|
* The default value for MAKE_META_PREFIX
|
|
* prints the absolute path of the target.
|
|
* This works be cause :H will generate '.' if there is no /
|
|
* and :tA will resolve that to cwd.
|
|
*/
|
|
Var_Set(MAKE_META_PREFIX, "Building ${.TARGET:H:tA}/${.TARGET:T}", VAR_GLOBAL, 0);
|
|
}
|
|
if (once)
|
|
return;
|
|
once = 1;
|
|
memset(&Mybm, 0, sizeof(Mybm));
|
|
/*
|
|
* We consider ourselves master of all within ${.MAKE.META.BAILIWICK}
|
|
*/
|
|
metaBailiwick = Lst_Init(FALSE);
|
|
metaBailiwickStr = Var_Subst(NULL, "${.MAKE.META.BAILIWICK:O:u:tA}",
|
|
VAR_GLOBAL, VARF_WANTRES);
|
|
if (metaBailiwickStr) {
|
|
str2Lst_Append(metaBailiwick, metaBailiwickStr, NULL);
|
|
}
|
|
/*
|
|
* We ignore any paths that start with ${.MAKE.META.IGNORE_PATHS}
|
|
*/
|
|
metaIgnorePaths = Lst_Init(FALSE);
|
|
Var_Append(MAKE_META_IGNORE_PATHS,
|
|
"/dev /etc /proc /tmp /var/run /var/tmp ${TMPDIR}", VAR_GLOBAL);
|
|
metaIgnorePathsStr = Var_Subst(NULL,
|
|
"${" MAKE_META_IGNORE_PATHS ":O:u:tA}", VAR_GLOBAL,
|
|
VARF_WANTRES);
|
|
if (metaIgnorePathsStr) {
|
|
str2Lst_Append(metaIgnorePaths, metaIgnorePathsStr, NULL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* In each case below we allow for job==NULL
|
|
*/
|
|
void
|
|
meta_job_start(Job *job, GNode *gn)
|
|
{
|
|
BuildMon *pbm;
|
|
|
|
if (job != NULL) {
|
|
pbm = &job->bm;
|
|
} else {
|
|
pbm = &Mybm;
|
|
}
|
|
pbm->mfp = meta_create(pbm, gn);
|
|
#ifdef USE_FILEMON_ONCE
|
|
/* compat mode we open the filemon dev once per command */
|
|
if (job == NULL)
|
|
return;
|
|
#endif
|
|
#ifdef USE_FILEMON
|
|
if (pbm->mfp != NULL && useFilemon) {
|
|
filemon_open(pbm);
|
|
} else {
|
|
pbm->mon_fd = pbm->filemon_fd = -1;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* The child calls this before doing anything.
|
|
* It does not disturb our state.
|
|
*/
|
|
void
|
|
meta_job_child(Job *job)
|
|
{
|
|
#ifdef USE_FILEMON
|
|
BuildMon *pbm;
|
|
|
|
if (job != NULL) {
|
|
pbm = &job->bm;
|
|
} else {
|
|
pbm = &Mybm;
|
|
}
|
|
if (pbm->mfp != NULL) {
|
|
close(fileno(pbm->mfp));
|
|
if (useFilemon) {
|
|
pid_t pid;
|
|
|
|
pid = getpid();
|
|
if (ioctl(pbm->filemon_fd, FILEMON_SET_PID, &pid) < 0) {
|
|
err(1, "Could not set filemon pid!");
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void
|
|
meta_job_error(Job *job, GNode *gn, int flags, int status)
|
|
{
|
|
char cwd[MAXPATHLEN];
|
|
BuildMon *pbm;
|
|
|
|
if (job != NULL) {
|
|
pbm = &job->bm;
|
|
if (!gn)
|
|
gn = job->node;
|
|
} else {
|
|
pbm = &Mybm;
|
|
}
|
|
if (pbm->mfp != NULL) {
|
|
fprintf(pbm->mfp, "*** Error code %d%s\n",
|
|
status,
|
|
(flags & JOB_IGNERR) ?
|
|
"(ignored)" : "");
|
|
}
|
|
if (gn) {
|
|
Var_Set(".ERROR_TARGET", gn->path ? gn->path : gn->name, VAR_GLOBAL, 0);
|
|
}
|
|
getcwd(cwd, sizeof(cwd));
|
|
Var_Set(".ERROR_CWD", cwd, VAR_GLOBAL, 0);
|
|
if (pbm->meta_fname[0]) {
|
|
Var_Set(".ERROR_META_FILE", pbm->meta_fname, VAR_GLOBAL, 0);
|
|
}
|
|
meta_job_finish(job);
|
|
}
|
|
|
|
void
|
|
meta_job_output(Job *job, char *cp, const char *nl)
|
|
{
|
|
BuildMon *pbm;
|
|
|
|
if (job != NULL) {
|
|
pbm = &job->bm;
|
|
} else {
|
|
pbm = &Mybm;
|
|
}
|
|
if (pbm->mfp != NULL) {
|
|
if (metaVerbose) {
|
|
static char *meta_prefix = NULL;
|
|
static int meta_prefix_len;
|
|
|
|
if (!meta_prefix) {
|
|
char *cp2;
|
|
|
|
meta_prefix = Var_Subst(NULL, "${" MAKE_META_PREFIX "}",
|
|
VAR_GLOBAL, VARF_WANTRES);
|
|
if ((cp2 = strchr(meta_prefix, '$')))
|
|
meta_prefix_len = cp2 - meta_prefix;
|
|
else
|
|
meta_prefix_len = strlen(meta_prefix);
|
|
}
|
|
if (strncmp(cp, meta_prefix, meta_prefix_len) == 0) {
|
|
cp = strchr(cp+1, '\n');
|
|
if (!cp++)
|
|
return;
|
|
}
|
|
}
|
|
fprintf(pbm->mfp, "%s%s", cp, nl);
|
|
}
|
|
}
|
|
|
|
void
|
|
meta_cmd_finish(void *pbmp)
|
|
{
|
|
#ifdef USE_FILEMON
|
|
BuildMon *pbm = pbmp;
|
|
|
|
if (!pbm)
|
|
pbm = &Mybm;
|
|
|
|
if (pbm->filemon_fd >= 0) {
|
|
close(pbm->filemon_fd);
|
|
filemon_read(pbm->mfp, pbm->mon_fd);
|
|
pbm->filemon_fd = pbm->mon_fd = -1;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void
|
|
meta_job_finish(Job *job)
|
|
{
|
|
BuildMon *pbm;
|
|
|
|
if (job != NULL) {
|
|
pbm = &job->bm;
|
|
} else {
|
|
pbm = &Mybm;
|
|
}
|
|
if (pbm->mfp != NULL) {
|
|
meta_cmd_finish(pbm);
|
|
fclose(pbm->mfp);
|
|
pbm->mfp = NULL;
|
|
pbm->meta_fname[0] = '\0';
|
|
}
|
|
}
|
|
|
|
void
|
|
meta_finish(void)
|
|
{
|
|
Lst_Destroy(metaBailiwick, NULL);
|
|
free(metaBailiwickStr);
|
|
Lst_Destroy(metaIgnorePaths, NULL);
|
|
free(metaIgnorePathsStr);
|
|
}
|
|
|
|
/*
|
|
* Fetch a full line from fp - growing bufp if needed
|
|
* Return length in bufp.
|
|
*/
|
|
static int
|
|
fgetLine(char **bufp, size_t *szp, int o, FILE *fp)
|
|
{
|
|
char *buf = *bufp;
|
|
size_t bufsz = *szp;
|
|
struct stat fs;
|
|
int x;
|
|
|
|
if (fgets(&buf[o], bufsz - o, fp) != NULL) {
|
|
check_newline:
|
|
x = o + strlen(&buf[o]);
|
|
if (buf[x - 1] == '\n')
|
|
return x;
|
|
/*
|
|
* We need to grow the buffer.
|
|
* The meta file can give us a clue.
|
|
*/
|
|
if (fstat(fileno(fp), &fs) == 0) {
|
|
size_t newsz;
|
|
char *p;
|
|
|
|
newsz = ROUNDUP((fs.st_size / 2), BUFSIZ);
|
|
if (newsz <= bufsz)
|
|
newsz = ROUNDUP(fs.st_size, BUFSIZ);
|
|
if (DEBUG(META))
|
|
fprintf(debug_file, "growing buffer %u -> %u\n",
|
|
(unsigned)bufsz, (unsigned)newsz);
|
|
p = bmake_realloc(buf, newsz);
|
|
if (p) {
|
|
*bufp = buf = p;
|
|
*szp = bufsz = newsz;
|
|
/* fetch the rest */
|
|
if (!fgets(&buf[x], bufsz - x, fp))
|
|
return x; /* truncated! */
|
|
goto check_newline;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
prefix_match(void *p, void *q)
|
|
{
|
|
const char *prefix = p;
|
|
const char *path = q;
|
|
size_t n = strlen(prefix);
|
|
|
|
return (0 == strncmp(path, prefix, n));
|
|
}
|
|
|
|
static int
|
|
string_match(const void *p, const void *q)
|
|
{
|
|
const char *p1 = p;
|
|
const char *p2 = q;
|
|
|
|
return strcmp(p1, p2);
|
|
}
|
|
|
|
|
|
/*
|
|
* When running with 'meta' functionality, a target can be out-of-date
|
|
* if any of the references in its meta data file is more recent.
|
|
* We have to track the latestdir on a per-process basis.
|
|
*/
|
|
#define LCWD_VNAME_FMT ".meta.%d.lcwd"
|
|
#define LDIR_VNAME_FMT ".meta.%d.ldir"
|
|
|
|
/*
|
|
* It is possible that a .meta file is corrupted,
|
|
* if we detect this we want to reproduce it.
|
|
* Setting oodate TRUE will have that effect.
|
|
*/
|
|
#define CHECK_VALID_META(p) if (!(p && *p)) { \
|
|
warnx("%s: %d: malformed", fname, lineno); \
|
|
oodate = TRUE; \
|
|
continue; \
|
|
}
|
|
|
|
#define DEQUOTE(p) if (*p == '\'') { \
|
|
char *ep; \
|
|
p++; \
|
|
if ((ep = strchr(p, '\''))) \
|
|
*ep = '\0'; \
|
|
}
|
|
|
|
Boolean
|
|
meta_oodate(GNode *gn, Boolean oodate)
|
|
{
|
|
static char *tmpdir = NULL;
|
|
static char cwd[MAXPATHLEN];
|
|
char lcwd_vname[64];
|
|
char ldir_vname[64];
|
|
char lcwd[MAXPATHLEN];
|
|
char latestdir[MAXPATHLEN];
|
|
char fname[MAXPATHLEN];
|
|
char fname1[MAXPATHLEN];
|
|
char fname2[MAXPATHLEN];
|
|
char fname3[MAXPATHLEN];
|
|
char *p;
|
|
char *cp;
|
|
char *link_src;
|
|
char *move_target;
|
|
static size_t cwdlen = 0;
|
|
static size_t tmplen = 0;
|
|
FILE *fp;
|
|
Boolean needOODATE = FALSE;
|
|
Lst missingFiles;
|
|
|
|
if (oodate)
|
|
return oodate; /* we're done */
|
|
|
|
missingFiles = Lst_Init(FALSE);
|
|
|
|
/*
|
|
* We need to check if the target is out-of-date. This includes
|
|
* checking if the expanded command has changed. This in turn
|
|
* requires that all variables are set in the same way that they
|
|
* would be if the target needs to be re-built.
|
|
*/
|
|
Make_DoAllVar(gn);
|
|
|
|
meta_name(gn, fname, sizeof(fname), NULL, NULL);
|
|
|
|
#ifdef DEBUG_META_MODE
|
|
if (DEBUG(META))
|
|
fprintf(debug_file, "meta_oodate: %s\n", fname);
|
|
#endif
|
|
|
|
if ((fp = fopen(fname, "r")) != NULL) {
|
|
static char *buf = NULL;
|
|
static size_t bufsz;
|
|
int lineno = 0;
|
|
int lastpid = 0;
|
|
int pid;
|
|
int f = 0;
|
|
int x;
|
|
LstNode ln;
|
|
struct stat fs;
|
|
|
|
if (!buf) {
|
|
bufsz = 8 * BUFSIZ;
|
|
buf = bmake_malloc(bufsz);
|
|
}
|
|
|
|
if (!cwdlen) {
|
|
if (getcwd(cwd, sizeof(cwd)) == NULL)
|
|
err(1, "Could not get current working directory");
|
|
cwdlen = strlen(cwd);
|
|
}
|
|
strlcpy(lcwd, cwd, sizeof(lcwd));
|
|
strlcpy(latestdir, cwd, sizeof(latestdir));
|
|
|
|
if (!tmpdir) {
|
|
tmpdir = getTmpdir();
|
|
tmplen = strlen(tmpdir);
|
|
}
|
|
|
|
/* we want to track all the .meta we read */
|
|
Var_Append(".MAKE.META.FILES", fname, VAR_GLOBAL);
|
|
|
|
ln = Lst_First(gn->commands);
|
|
while (!oodate && (x = fgetLine(&buf, &bufsz, 0, fp)) > 0) {
|
|
lineno++;
|
|
if (buf[x - 1] == '\n')
|
|
buf[x - 1] = '\0';
|
|
else {
|
|
warnx("%s: %d: line truncated at %u", fname, lineno, x);
|
|
oodate = TRUE;
|
|
break;
|
|
}
|
|
link_src = NULL;
|
|
move_target = NULL;
|
|
/* Find the start of the build monitor section. */
|
|
if (!f) {
|
|
if (strncmp(buf, "-- filemon", 10) == 0) {
|
|
f = 1;
|
|
continue;
|
|
}
|
|
if (strncmp(buf, "# buildmon", 10) == 0) {
|
|
f = 1;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* Delimit the record type. */
|
|
p = buf;
|
|
#ifdef DEBUG_META_MODE
|
|
if (DEBUG(META))
|
|
fprintf(debug_file, "%s: %d: %s\n", fname, lineno, buf);
|
|
#endif
|
|
strsep(&p, " ");
|
|
if (f) {
|
|
/*
|
|
* We are in the 'filemon' output section.
|
|
* Each record from filemon follows the general form:
|
|
*
|
|
* <key> <pid> <data>
|
|
*
|
|
* Where:
|
|
* <key> is a single letter, denoting the syscall.
|
|
* <pid> is the process that made the syscall.
|
|
* <data> is the arguments (of interest).
|
|
*/
|
|
switch(buf[0]) {
|
|
case '#': /* comment */
|
|
case 'V': /* version */
|
|
break;
|
|
default:
|
|
/*
|
|
* We need to track pathnames per-process.
|
|
*
|
|
* Each process run by make, starts off in the 'CWD'
|
|
* recorded in the .meta file, if it chdirs ('C')
|
|
* elsewhere we need to track that - but only for
|
|
* that process. If it forks ('F'), we initialize
|
|
* the child to have the same cwd as its parent.
|
|
*
|
|
* We also need to track the 'latestdir' of
|
|
* interest. This is usually the same as cwd, but
|
|
* not if a process is reading directories.
|
|
*
|
|
* Each time we spot a different process ('pid')
|
|
* we save the current value of 'latestdir' in a
|
|
* variable qualified by 'lastpid', and
|
|
* re-initialize 'latestdir' to any pre-saved
|
|
* value for the current 'pid' and 'CWD' if none.
|
|
*/
|
|
CHECK_VALID_META(p);
|
|
pid = atoi(p);
|
|
if (pid > 0 && pid != lastpid) {
|
|
char *ldir;
|
|
char *tp;
|
|
|
|
if (lastpid > 0) {
|
|
/* We need to remember these. */
|
|
Var_Set(lcwd_vname, lcwd, VAR_GLOBAL, 0);
|
|
Var_Set(ldir_vname, latestdir, VAR_GLOBAL, 0);
|
|
}
|
|
snprintf(lcwd_vname, sizeof(lcwd_vname), LCWD_VNAME_FMT, pid);
|
|
snprintf(ldir_vname, sizeof(ldir_vname), LDIR_VNAME_FMT, pid);
|
|
lastpid = pid;
|
|
ldir = Var_Value(ldir_vname, VAR_GLOBAL, &tp);
|
|
if (ldir) {
|
|
strlcpy(latestdir, ldir, sizeof(latestdir));
|
|
free(tp);
|
|
}
|
|
ldir = Var_Value(lcwd_vname, VAR_GLOBAL, &tp);
|
|
if (ldir) {
|
|
strlcpy(lcwd, ldir, sizeof(lcwd));
|
|
free(tp);
|
|
}
|
|
}
|
|
/* Skip past the pid. */
|
|
if (strsep(&p, " ") == NULL)
|
|
continue;
|
|
#ifdef DEBUG_META_MODE
|
|
if (DEBUG(META))
|
|
fprintf(debug_file, "%s: %d: %d: %c: cwd=%s lcwd=%s ldir=%s\n",
|
|
fname, lineno,
|
|
pid, buf[0], cwd, lcwd, latestdir);
|
|
#endif
|
|
break;
|
|
}
|
|
|
|
CHECK_VALID_META(p);
|
|
|
|
/* Process according to record type. */
|
|
switch (buf[0]) {
|
|
case 'X': /* eXit */
|
|
Var_Delete(lcwd_vname, VAR_GLOBAL);
|
|
Var_Delete(ldir_vname, VAR_GLOBAL);
|
|
lastpid = 0; /* no need to save ldir_vname */
|
|
break;
|
|
|
|
case 'F': /* [v]Fork */
|
|
{
|
|
char cldir[64];
|
|
int child;
|
|
|
|
child = atoi(p);
|
|
if (child > 0) {
|
|
snprintf(cldir, sizeof(cldir), LCWD_VNAME_FMT, child);
|
|
Var_Set(cldir, lcwd, VAR_GLOBAL, 0);
|
|
snprintf(cldir, sizeof(cldir), LDIR_VNAME_FMT, child);
|
|
Var_Set(cldir, latestdir, VAR_GLOBAL, 0);
|
|
#ifdef DEBUG_META_MODE
|
|
if (DEBUG(META))
|
|
fprintf(debug_file, "%s: %d: %d: cwd=%s lcwd=%s ldir=%s\n",
|
|
fname, lineno,
|
|
child, cwd, lcwd, latestdir);
|
|
#endif
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 'C': /* Chdir */
|
|
/* Update lcwd and latest directory. */
|
|
strlcpy(latestdir, p, sizeof(latestdir));
|
|
strlcpy(lcwd, p, sizeof(lcwd));
|
|
Var_Set(lcwd_vname, lcwd, VAR_GLOBAL, 0);
|
|
Var_Set(ldir_vname, lcwd, VAR_GLOBAL, 0);
|
|
#ifdef DEBUG_META_MODE
|
|
if (DEBUG(META))
|
|
fprintf(debug_file, "%s: %d: cwd=%s ldir=%s\n", fname, lineno, cwd, lcwd);
|
|
#endif
|
|
break;
|
|
|
|
case 'M': /* renaMe */
|
|
/*
|
|
* For 'M'oves we want to check
|
|
* the src as for 'R'ead
|
|
* and the target as for 'W'rite.
|
|
*/
|
|
cp = p; /* save this for a second */
|
|
/* now get target */
|
|
if (strsep(&p, " ") == NULL)
|
|
continue;
|
|
CHECK_VALID_META(p);
|
|
move_target = p;
|
|
p = cp;
|
|
/* 'L' and 'M' put single quotes around the args */
|
|
DEQUOTE(p);
|
|
DEQUOTE(move_target);
|
|
/* FALLTHROUGH */
|
|
case 'D': /* unlink */
|
|
if (*p == '/' && !Lst_IsEmpty(missingFiles)) {
|
|
/* remove p from the missingFiles list if present */
|
|
if ((ln = Lst_Find(missingFiles, p, string_match)) != NULL) {
|
|
char *tp = Lst_Datum(ln);
|
|
Lst_Remove(missingFiles, ln);
|
|
free(tp);
|
|
ln = NULL; /* we're done with it */
|
|
}
|
|
}
|
|
if (buf[0] == 'M') {
|
|
/* the target of the mv is a file 'W'ritten */
|
|
#ifdef DEBUG_META_MODE
|
|
if (DEBUG(META))
|
|
fprintf(debug_file, "meta_oodate: M %s -> %s\n",
|
|
p, move_target);
|
|
#endif
|
|
p = move_target;
|
|
goto check_write;
|
|
}
|
|
break;
|
|
case 'L': /* Link */
|
|
/*
|
|
* For 'L'inks check
|
|
* the src as for 'R'ead
|
|
* and the target as for 'W'rite.
|
|
*/
|
|
link_src = p;
|
|
/* now get target */
|
|
if (strsep(&p, " ") == NULL)
|
|
continue;
|
|
CHECK_VALID_META(p);
|
|
/* 'L' and 'M' put single quotes around the args */
|
|
DEQUOTE(p);
|
|
DEQUOTE(link_src);
|
|
#ifdef DEBUG_META_MODE
|
|
if (DEBUG(META))
|
|
fprintf(debug_file, "meta_oodate: L %s -> %s\n",
|
|
link_src, p);
|
|
#endif
|
|
/* FALLTHROUGH */
|
|
case 'W': /* Write */
|
|
check_write:
|
|
/*
|
|
* If a file we generated within our bailiwick
|
|
* but outside of .OBJDIR is missing,
|
|
* we need to do it again.
|
|
*/
|
|
/* ignore non-absolute paths */
|
|
if (*p != '/')
|
|
break;
|
|
|
|
if (Lst_IsEmpty(metaBailiwick))
|
|
break;
|
|
|
|
/* ignore cwd - normal dependencies handle those */
|
|
if (strncmp(p, cwd, cwdlen) == 0)
|
|
break;
|
|
|
|
if (!Lst_ForEach(metaBailiwick, prefix_match, p))
|
|
break;
|
|
|
|
/* tmpdir might be within */
|
|
if (tmplen > 0 && strncmp(p, tmpdir, tmplen) == 0)
|
|
break;
|
|
|
|
/* ignore anything containing the string "tmp" */
|
|
if ((strstr("tmp", p)))
|
|
break;
|
|
|
|
if ((link_src != NULL && lstat(p, &fs) < 0) ||
|
|
(link_src == NULL && stat(p, &fs) < 0)) {
|
|
if (Lst_Find(missingFiles, p, string_match) == NULL)
|
|
Lst_AtEnd(missingFiles, bmake_strdup(p));
|
|
}
|
|
break;
|
|
check_link_src:
|
|
p = link_src;
|
|
link_src = NULL;
|
|
#ifdef DEBUG_META_MODE
|
|
if (DEBUG(META))
|
|
fprintf(debug_file, "meta_oodate: L src %s\n", p);
|
|
#endif
|
|
/* FALLTHROUGH */
|
|
case 'R': /* Read */
|
|
case 'E': /* Exec */
|
|
/*
|
|
* Check for runtime files that can't
|
|
* be part of the dependencies because
|
|
* they are _expected_ to change.
|
|
*/
|
|
if (*p == '/' &&
|
|
Lst_ForEach(metaIgnorePaths, prefix_match, p)) {
|
|
#ifdef DEBUG_META_MODE
|
|
if (DEBUG(META))
|
|
fprintf(debug_file, "meta_oodate: ignoring: %s\n",
|
|
p);
|
|
#endif
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* The rest of the record is the file name.
|
|
* Check if it's not an absolute path.
|
|
*/
|
|
{
|
|
char *sdirs[4];
|
|
char **sdp;
|
|
int sdx = 0;
|
|
int found = 0;
|
|
|
|
if (*p == '/') {
|
|
sdirs[sdx++] = p; /* done */
|
|
} else {
|
|
if (strcmp(".", p) == 0)
|
|
continue; /* no point */
|
|
|
|
/* Check vs latestdir */
|
|
snprintf(fname1, sizeof(fname1), "%s/%s", latestdir, p);
|
|
sdirs[sdx++] = fname1;
|
|
|
|
if (strcmp(latestdir, lcwd) != 0) {
|
|
/* Check vs lcwd */
|
|
snprintf(fname2, sizeof(fname2), "%s/%s", lcwd, p);
|
|
sdirs[sdx++] = fname2;
|
|
}
|
|
if (strcmp(lcwd, cwd) != 0) {
|
|
/* Check vs cwd */
|
|
snprintf(fname3, sizeof(fname3), "%s/%s", cwd, p);
|
|
sdirs[sdx++] = fname3;
|
|
}
|
|
}
|
|
sdirs[sdx++] = NULL;
|
|
|
|
for (sdp = sdirs; *sdp && !found; sdp++) {
|
|
#ifdef DEBUG_META_MODE
|
|
if (DEBUG(META))
|
|
fprintf(debug_file, "%s: %d: looking for: %s\n", fname, lineno, *sdp);
|
|
#endif
|
|
if (stat(*sdp, &fs) == 0) {
|
|
found = 1;
|
|
p = *sdp;
|
|
}
|
|
}
|
|
if (found) {
|
|
#ifdef DEBUG_META_MODE
|
|
if (DEBUG(META))
|
|
fprintf(debug_file, "%s: %d: found: %s\n", fname, lineno, p);
|
|
#endif
|
|
if (!S_ISDIR(fs.st_mode) &&
|
|
fs.st_mtime > gn->mtime) {
|
|
if (DEBUG(META))
|
|
fprintf(debug_file, "%s: %d: file '%s' is newer than the target...\n", fname, lineno, p);
|
|
oodate = TRUE;
|
|
} else if (S_ISDIR(fs.st_mode)) {
|
|
/* Update the latest directory. */
|
|
realpath(p, latestdir);
|
|
}
|
|
} else if (errno == ENOENT && *p == '/' &&
|
|
strncmp(p, cwd, cwdlen) != 0) {
|
|
/*
|
|
* A referenced file outside of CWD is missing.
|
|
* We cannot catch every eventuality here...
|
|
*/
|
|
if (Lst_Find(missingFiles, p, string_match) == NULL)
|
|
Lst_AtEnd(missingFiles, bmake_strdup(p));
|
|
}
|
|
}
|
|
if (buf[0] == 'E') {
|
|
/* previous latestdir is no longer relevant */
|
|
strlcpy(latestdir, lcwd, sizeof(latestdir));
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (!oodate && buf[0] == 'L' && link_src != NULL)
|
|
goto check_link_src;
|
|
} else if (strcmp(buf, "CMD") == 0) {
|
|
/*
|
|
* Compare the current command with the one in the
|
|
* meta data file.
|
|
*/
|
|
if (ln == NULL) {
|
|
if (DEBUG(META))
|
|
fprintf(debug_file, "%s: %d: there were more build commands in the meta data file than there are now...\n", fname, lineno);
|
|
oodate = TRUE;
|
|
} else {
|
|
char *cmd = (char *)Lst_Datum(ln);
|
|
Boolean hasOODATE = FALSE;
|
|
|
|
if (strstr(cmd, "$?"))
|
|
hasOODATE = TRUE;
|
|
else if ((cp = strstr(cmd, ".OODATE"))) {
|
|
/* check for $[{(].OODATE[:)}] */
|
|
if (cp > cmd + 2 && cp[-2] == '$')
|
|
hasOODATE = TRUE;
|
|
}
|
|
if (hasOODATE) {
|
|
needOODATE = TRUE;
|
|
if (DEBUG(META))
|
|
fprintf(debug_file, "%s: %d: cannot compare command using .OODATE\n", fname, lineno);
|
|
}
|
|
cmd = Var_Subst(NULL, cmd, gn, VARF_WANTRES|VARF_UNDEFERR);
|
|
|
|
if ((cp = strchr(cmd, '\n'))) {
|
|
int n;
|
|
|
|
/*
|
|
* This command contains newlines, we need to
|
|
* fetch more from the .meta file before we
|
|
* attempt a comparison.
|
|
*/
|
|
/* first put the newline back at buf[x - 1] */
|
|
buf[x - 1] = '\n';
|
|
do {
|
|
/* now fetch the next line */
|
|
if ((n = fgetLine(&buf, &bufsz, x, fp)) <= 0)
|
|
break;
|
|
x = n;
|
|
lineno++;
|
|
if (buf[x - 1] != '\n') {
|
|
warnx("%s: %d: line truncated at %u", fname, lineno, x);
|
|
break;
|
|
}
|
|
cp = strchr(++cp, '\n');
|
|
} while (cp);
|
|
if (buf[x - 1] == '\n')
|
|
buf[x - 1] = '\0';
|
|
}
|
|
if (!hasOODATE &&
|
|
!(gn->type & OP_NOMETA_CMP) &&
|
|
strcmp(p, cmd) != 0) {
|
|
if (DEBUG(META))
|
|
fprintf(debug_file, "%s: %d: a build command has changed\n%s\nvs\n%s\n", fname, lineno, p, cmd);
|
|
if (!metaIgnoreCMDs)
|
|
oodate = TRUE;
|
|
}
|
|
free(cmd);
|
|
ln = Lst_Succ(ln);
|
|
}
|
|
} else if (strcmp(buf, "CWD") == 0) {
|
|
/*
|
|
* Check if there are extra commands now
|
|
* that weren't in the meta data file.
|
|
*/
|
|
if (!oodate && ln != NULL) {
|
|
if (DEBUG(META))
|
|
fprintf(debug_file, "%s: %d: there are extra build commands now that weren't in the meta data file\n", fname, lineno);
|
|
oodate = TRUE;
|
|
}
|
|
if (strcmp(p, cwd) != 0) {
|
|
if (DEBUG(META))
|
|
fprintf(debug_file, "%s: %d: the current working directory has changed from '%s' to '%s'\n", fname, lineno, p, curdir);
|
|
oodate = TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
fclose(fp);
|
|
if (!Lst_IsEmpty(missingFiles)) {
|
|
if (DEBUG(META))
|
|
fprintf(debug_file, "%s: missing files: %s...\n",
|
|
fname, (char *)Lst_Datum(Lst_First(missingFiles)));
|
|
oodate = TRUE;
|
|
}
|
|
} else {
|
|
if ((gn->type & OP_META)) {
|
|
if (DEBUG(META))
|
|
fprintf(debug_file, "%s: required but missing\n", fname);
|
|
oodate = TRUE;
|
|
}
|
|
}
|
|
|
|
Lst_Destroy(missingFiles, (FreeProc *)free);
|
|
|
|
if (oodate && needOODATE) {
|
|
/*
|
|
* Target uses .OODATE which is empty; or we wouldn't be here.
|
|
* We have decided it is oodate, so .OODATE needs to be set.
|
|
* All we can sanely do is set it to .ALLSRC.
|
|
*/
|
|
Var_Delete(OODATE, gn);
|
|
Var_Set(OODATE, Var_Value(ALLSRC, gn, &cp), gn, 0);
|
|
free(cp);
|
|
}
|
|
return oodate;
|
|
}
|
|
|
|
/* support for compat mode */
|
|
|
|
static int childPipe[2];
|
|
|
|
void
|
|
meta_compat_start(void)
|
|
{
|
|
#ifdef USE_FILEMON_ONCE
|
|
/*
|
|
* We need to re-open filemon for each cmd.
|
|
*/
|
|
BuildMon *pbm = &Mybm;
|
|
|
|
if (pbm->mfp != NULL && useFilemon) {
|
|
filemon_open(pbm);
|
|
} else {
|
|
pbm->mon_fd = pbm->filemon_fd = -1;
|
|
}
|
|
#endif
|
|
if (pipe(childPipe) < 0)
|
|
Punt("Cannot create pipe: %s", strerror(errno));
|
|
/* Set close-on-exec flag for both */
|
|
(void)fcntl(childPipe[0], F_SETFD, FD_CLOEXEC);
|
|
(void)fcntl(childPipe[1], F_SETFD, FD_CLOEXEC);
|
|
}
|
|
|
|
void
|
|
meta_compat_child(void)
|
|
{
|
|
meta_job_child(NULL);
|
|
if (dup2(childPipe[1], 1) < 0 ||
|
|
dup2(1, 2) < 0) {
|
|
execError("dup2", "pipe");
|
|
_exit(1);
|
|
}
|
|
}
|
|
|
|
void
|
|
meta_compat_parent(void)
|
|
{
|
|
FILE *fp;
|
|
char buf[BUFSIZ];
|
|
|
|
close(childPipe[1]); /* child side */
|
|
fp = fdopen(childPipe[0], "r");
|
|
while (fgets(buf, sizeof(buf), fp)) {
|
|
meta_job_output(NULL, buf, "");
|
|
printf("%s", buf);
|
|
}
|
|
fclose(fp);
|
|
}
|
|
|
|
#endif /* USE_META */
|