Current Path : /usr/src/usr.bin/xinstall/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //usr/src/usr.bin/xinstall/xinstall.c |
/* * Copyright (c) 1987, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static const char copyright[] = "@(#) Copyright (c) 1987, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #if 0 #ifndef lint static char sccsid[] = "@(#)xinstall.c 8.1 (Berkeley) 7/21/93"; #endif /* not lint */ #endif #include <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/usr.bin/xinstall/xinstall.c 238291 2012-07-09 10:33:53Z kib $"); #include <sys/param.h> #include <sys/mman.h> #include <sys/mount.h> #include <sys/stat.h> #include <sys/time.h> #include <sys/wait.h> #include <err.h> #include <errno.h> #include <fcntl.h> #include <grp.h> #include <paths.h> #include <pwd.h> #include <stdint.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sysexits.h> #include <unistd.h> /* Bootstrap aid - this doesn't exist in most older releases */ #ifndef MAP_FAILED #define MAP_FAILED ((void *)-1) /* from <sys/mman.h> */ #endif #define MAX_CMP_SIZE (16 * 1024 * 1024) #define DIRECTORY 0x01 /* Tell install it's a directory. */ #define SETFLAGS 0x02 /* Tell install to set flags. */ #define NOCHANGEBITS (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND) #define BACKUP_SUFFIX ".old" struct passwd *pp; struct group *gp; gid_t gid; uid_t uid; int dobackup, docompare, dodir, dopreserve, dostrip, nommap, safecopy, verbose; mode_t mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH; const char *suffix = BACKUP_SUFFIX; static int compare(int, const char *, size_t, int, const char *, size_t); static void copy(int, const char *, int, const char *, off_t); static int create_newfile(const char *, int, struct stat *); static int create_tempfile(const char *, char *, size_t); static void install(const char *, const char *, u_long, u_int); static void install_dir(char *); static u_long numeric_id(const char *, const char *); static void strip(const char *); static int trymmap(int); static void usage(void); int main(int argc, char *argv[]) { struct stat from_sb, to_sb; mode_t *set; u_long fset; int ch, no_target; u_int iflags; char *flags; const char *group, *owner, *to_name; iflags = 0; group = owner = NULL; while ((ch = getopt(argc, argv, "B:bCcdf:g:Mm:o:pSsv")) != -1) switch((char)ch) { case 'B': suffix = optarg; /* FALLTHROUGH */ case 'b': dobackup = 1; break; case 'C': docompare = 1; break; case 'c': /* For backwards compatibility. */ break; case 'd': dodir = 1; break; case 'f': flags = optarg; if (strtofflags(&flags, &fset, NULL)) errx(EX_USAGE, "%s: invalid flag", flags); iflags |= SETFLAGS; break; case 'g': group = optarg; break; case 'M': nommap = 1; break; case 'm': if (!(set = setmode(optarg))) errx(EX_USAGE, "invalid file mode: %s", optarg); mode = getmode(set, 0); free(set); break; case 'o': owner = optarg; break; case 'p': docompare = dopreserve = 1; break; case 'S': safecopy = 1; break; case 's': dostrip = 1; break; case 'v': verbose = 1; break; case '?': default: usage(); } argc -= optind; argv += optind; /* some options make no sense when creating directories */ if (dostrip && dodir) { warnx("-d and -s may not be specified together"); usage(); } if (getenv("DONTSTRIP") != NULL) { warnx("DONTSTRIP set - will not strip installed binaries"); dostrip = 0; } /* must have at least two arguments, except when creating directories */ if (argc == 0 || (argc == 1 && !dodir)) usage(); /* need to make a temp copy so we can compare stripped version */ if (docompare && dostrip) safecopy = 1; /* get group and owner id's */ if (group != NULL) { if ((gp = getgrnam(group)) != NULL) gid = gp->gr_gid; else gid = (gid_t)numeric_id(group, "group"); } else gid = (gid_t)-1; if (owner != NULL) { if ((pp = getpwnam(owner)) != NULL) uid = pp->pw_uid; else uid = (uid_t)numeric_id(owner, "user"); } else uid = (uid_t)-1; if (dodir) { for (; *argv != NULL; ++argv) install_dir(*argv); exit(EX_OK); /* NOTREACHED */ } no_target = stat(to_name = argv[argc - 1], &to_sb); if (!no_target && S_ISDIR(to_sb.st_mode)) { for (; *argv != to_name; ++argv) install(*argv, to_name, fset, iflags | DIRECTORY); exit(EX_OK); /* NOTREACHED */ } /* can't do file1 file2 directory/file */ if (argc != 2) { if (no_target) warnx("target directory `%s' does not exist", argv[argc - 1]); else warnx("target `%s' is not a directory", argv[argc - 1]); usage(); } if (!no_target) { if (stat(*argv, &from_sb)) err(EX_OSERR, "%s", *argv); if (!S_ISREG(to_sb.st_mode)) { errno = EFTYPE; err(EX_OSERR, "%s", to_name); } if (to_sb.st_dev == from_sb.st_dev && to_sb.st_ino == from_sb.st_ino) errx(EX_USAGE, "%s and %s are the same file", *argv, to_name); } install(*argv, to_name, fset, iflags); exit(EX_OK); /* NOTREACHED */ } static u_long numeric_id(const char *name, const char *type) { u_long val; char *ep; /* * XXX * We know that uid_t's and gid_t's are unsigned longs. */ errno = 0; val = strtoul(name, &ep, 10); if (errno) err(EX_NOUSER, "%s", name); if (*ep != '\0') errx(EX_NOUSER, "unknown %s %s", type, name); return (val); } /* * install -- * build a path name and install the file */ static void install(const char *from_name, const char *to_name, u_long fset, u_int flags) { struct stat from_sb, temp_sb, to_sb; struct timeval tvb[2]; int devnull, files_match, from_fd, serrno, target; int tempcopy, temp_fd, to_fd; char backup[MAXPATHLEN], *p, pathbuf[MAXPATHLEN], tempfile[MAXPATHLEN]; files_match = 0; from_fd = -1; to_fd = -1; /* If try to install NULL file to a directory, fails. */ if (flags & DIRECTORY || strcmp(from_name, _PATH_DEVNULL)) { if (stat(from_name, &from_sb)) err(EX_OSERR, "%s", from_name); if (!S_ISREG(from_sb.st_mode)) { errno = EFTYPE; err(EX_OSERR, "%s", from_name); } /* Build the target path. */ if (flags & DIRECTORY) { (void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s", to_name, (p = strrchr(from_name, '/')) ? ++p : from_name); to_name = pathbuf; } devnull = 0; } else { devnull = 1; } target = stat(to_name, &to_sb) == 0; /* Only install to regular files. */ if (target && !S_ISREG(to_sb.st_mode)) { errno = EFTYPE; warn("%s", to_name); return; } /* Only copy safe if the target exists. */ tempcopy = safecopy && target; if (!devnull && (from_fd = open(from_name, O_RDONLY, 0)) < 0) err(EX_OSERR, "%s", from_name); /* If we don't strip, we can compare first. */ if (docompare && !dostrip && target) { if ((to_fd = open(to_name, O_RDONLY, 0)) < 0) err(EX_OSERR, "%s", to_name); if (devnull) files_match = to_sb.st_size == 0; else files_match = !(compare(from_fd, from_name, (size_t)from_sb.st_size, to_fd, to_name, (size_t)to_sb.st_size)); /* Close "to" file unless we match. */ if (!files_match) (void)close(to_fd); } if (!files_match) { if (tempcopy) { to_fd = create_tempfile(to_name, tempfile, sizeof(tempfile)); if (to_fd < 0) err(EX_OSERR, "%s", tempfile); } else { if ((to_fd = create_newfile(to_name, target, &to_sb)) < 0) err(EX_OSERR, "%s", to_name); if (verbose) (void)printf("install: %s -> %s\n", from_name, to_name); } if (!devnull) copy(from_fd, from_name, to_fd, tempcopy ? tempfile : to_name, from_sb.st_size); } if (dostrip) { strip(tempcopy ? tempfile : to_name); /* * Re-open our fd on the target, in case we used a strip * that does not work in-place -- like GNU binutils strip. */ close(to_fd); to_fd = open(tempcopy ? tempfile : to_name, O_RDONLY, 0); if (to_fd < 0) err(EX_OSERR, "stripping %s", to_name); } /* * Compare the stripped temp file with the target. */ if (docompare && dostrip && target) { temp_fd = to_fd; /* Re-open to_fd using the real target name. */ if ((to_fd = open(to_name, O_RDONLY, 0)) < 0) err(EX_OSERR, "%s", to_name); if (fstat(temp_fd, &temp_sb)) { serrno = errno; (void)unlink(tempfile); errno = serrno; err(EX_OSERR, "%s", tempfile); } if (compare(temp_fd, tempfile, (size_t)temp_sb.st_size, to_fd, to_name, (size_t)to_sb.st_size) == 0) { /* * If target has more than one link we need to * replace it in order to snap the extra links. * Need to preserve target file times, though. */ if (to_sb.st_nlink != 1) { tvb[0].tv_sec = to_sb.st_atime; tvb[0].tv_usec = 0; tvb[1].tv_sec = to_sb.st_mtime; tvb[1].tv_usec = 0; (void)utimes(tempfile, tvb); } else { files_match = 1; (void)unlink(tempfile); } (void) close(temp_fd); } } /* * Move the new file into place if doing a safe copy * and the files are different (or just not compared). */ if (tempcopy && !files_match) { /* Try to turn off the immutable bits. */ if (to_sb.st_flags & NOCHANGEBITS) (void)chflags(to_name, to_sb.st_flags & ~NOCHANGEBITS); if (dobackup) { if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s", to_name, suffix) != strlen(to_name) + strlen(suffix)) { unlink(tempfile); errx(EX_OSERR, "%s: backup filename too long", to_name); } if (verbose) (void)printf("install: %s -> %s\n", to_name, backup); if (rename(to_name, backup) < 0) { serrno = errno; unlink(tempfile); errno = serrno; err(EX_OSERR, "rename: %s to %s", to_name, backup); } } if (verbose) (void)printf("install: %s -> %s\n", from_name, to_name); if (rename(tempfile, to_name) < 0) { serrno = errno; unlink(tempfile); errno = serrno; err(EX_OSERR, "rename: %s to %s", tempfile, to_name); } /* Re-open to_fd so we aren't hosed by the rename(2). */ (void) close(to_fd); if ((to_fd = open(to_name, O_RDONLY, 0)) < 0) err(EX_OSERR, "%s", to_name); } /* * Preserve the timestamp of the source file if necessary. */ if (dopreserve && !files_match && !devnull) { tvb[0].tv_sec = from_sb.st_atime; tvb[0].tv_usec = 0; tvb[1].tv_sec = from_sb.st_mtime; tvb[1].tv_usec = 0; (void)utimes(to_name, tvb); } if (fstat(to_fd, &to_sb) == -1) { serrno = errno; (void)unlink(to_name); errno = serrno; err(EX_OSERR, "%s", to_name); } /* * Set owner, group, mode for target; do the chown first, * chown may lose the setuid bits. */ if ((gid != (gid_t)-1 && gid != to_sb.st_gid) || (uid != (uid_t)-1 && uid != to_sb.st_uid) || (mode != (to_sb.st_mode & ALLPERMS))) { /* Try to turn off the immutable bits. */ if (to_sb.st_flags & NOCHANGEBITS) (void)fchflags(to_fd, to_sb.st_flags & ~NOCHANGEBITS); } if ((gid != (gid_t)-1 && gid != to_sb.st_gid) || (uid != (uid_t)-1 && uid != to_sb.st_uid)) if (fchown(to_fd, uid, gid) == -1) { serrno = errno; (void)unlink(to_name); errno = serrno; err(EX_OSERR,"%s: chown/chgrp", to_name); } if (mode != (to_sb.st_mode & ALLPERMS)) if (fchmod(to_fd, mode)) { serrno = errno; (void)unlink(to_name); errno = serrno; err(EX_OSERR, "%s: chmod", to_name); } /* * If provided a set of flags, set them, otherwise, preserve the * flags, except for the dump flag. * NFS does not support flags. Ignore EOPNOTSUPP flags if we're just * trying to turn off UF_NODUMP. If we're trying to set real flags, * then warn if the fs doesn't support it, otherwise fail. */ if (!devnull && (flags & SETFLAGS || (from_sb.st_flags & ~UF_NODUMP) != to_sb.st_flags) && fchflags(to_fd, flags & SETFLAGS ? fset : from_sb.st_flags & ~UF_NODUMP)) { if (flags & SETFLAGS) { if (errno == EOPNOTSUPP) warn("%s: chflags", to_name); else { serrno = errno; (void)unlink(to_name); errno = serrno; err(EX_OSERR, "%s: chflags", to_name); } } } (void)close(to_fd); if (!devnull) (void)close(from_fd); } /* * compare -- * compare two files; non-zero means files differ */ static int compare(int from_fd, const char *from_name __unused, size_t from_len, int to_fd, const char *to_name __unused, size_t to_len) { char *p, *q; int rv; int done_compare; rv = 0; if (from_len != to_len) return 1; if (from_len <= MAX_CMP_SIZE) { done_compare = 0; if (trymmap(from_fd) && trymmap(to_fd)) { p = mmap(NULL, from_len, PROT_READ, MAP_SHARED, from_fd, (off_t)0); if (p == (char *)MAP_FAILED) goto out; q = mmap(NULL, from_len, PROT_READ, MAP_SHARED, to_fd, (off_t)0); if (q == (char *)MAP_FAILED) { munmap(p, from_len); goto out; } rv = memcmp(p, q, from_len); munmap(p, from_len); munmap(q, from_len); done_compare = 1; } out: if (!done_compare) { char buf1[MAXBSIZE]; char buf2[MAXBSIZE]; int n1, n2; rv = 0; lseek(from_fd, 0, SEEK_SET); lseek(to_fd, 0, SEEK_SET); while (rv == 0) { n1 = read(from_fd, buf1, sizeof(buf1)); if (n1 == 0) break; /* EOF */ else if (n1 > 0) { n2 = read(to_fd, buf2, n1); if (n2 == n1) rv = memcmp(buf1, buf2, n1); else rv = 1; /* out of sync */ } else rv = 1; /* read failure */ } lseek(from_fd, 0, SEEK_SET); lseek(to_fd, 0, SEEK_SET); } } else rv = 1; /* don't bother in this case */ return rv; } /* * create_tempfile -- * create a temporary file based on path and open it */ static int create_tempfile(const char *path, char *temp, size_t tsize) { char *p; (void)strncpy(temp, path, tsize); temp[tsize - 1] = '\0'; if ((p = strrchr(temp, '/')) != NULL) p++; else p = temp; (void)strncpy(p, "INS@XXXX", &temp[tsize - 1] - p); temp[tsize - 1] = '\0'; return (mkstemp(temp)); } /* * create_newfile -- * create a new file, overwriting an existing one if necessary */ static int create_newfile(const char *path, int target, struct stat *sbp) { char backup[MAXPATHLEN]; int saved_errno = 0; int newfd; if (target) { /* * Unlink now... avoid ETXTBSY errors later. Try to turn * off the append/immutable bits -- if we fail, go ahead, * it might work. */ if (sbp->st_flags & NOCHANGEBITS) (void)chflags(path, sbp->st_flags & ~NOCHANGEBITS); if (dobackup) { if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s", path, suffix) != strlen(path) + strlen(suffix)) errx(EX_OSERR, "%s: backup filename too long", path); (void)snprintf(backup, MAXPATHLEN, "%s%s", path, suffix); if (verbose) (void)printf("install: %s -> %s\n", path, backup); if (rename(path, backup) < 0) err(EX_OSERR, "rename: %s to %s", path, backup); } else if (unlink(path) < 0) saved_errno = errno; } newfd = open(path, O_CREAT | O_RDWR | O_TRUNC, S_IRUSR | S_IWUSR); if (newfd < 0 && saved_errno != 0) errno = saved_errno; return newfd; } /* * copy -- * copy from one file to another */ static void copy(int from_fd, const char *from_name, int to_fd, const char *to_name, off_t size) { int nr, nw; int serrno; char *p, buf[MAXBSIZE]; int done_copy; /* Rewind file descriptors. */ if (lseek(from_fd, (off_t)0, SEEK_SET) == (off_t)-1) err(EX_OSERR, "lseek: %s", from_name); if (lseek(to_fd, (off_t)0, SEEK_SET) == (off_t)-1) err(EX_OSERR, "lseek: %s", to_name); /* * Mmap and write if less than 8M (the limit is so we don't totally * trash memory on big files. This is really a minor hack, but it * wins some CPU back. */ done_copy = 0; if (size <= 8 * 1048576 && trymmap(from_fd) && (p = mmap(NULL, (size_t)size, PROT_READ, MAP_SHARED, from_fd, (off_t)0)) != (char *)MAP_FAILED) { nw = write(to_fd, p, size); if (nw != size) { serrno = errno; (void)unlink(to_name); if (nw >= 0) { errx(EX_OSERR, "short write to %s: %jd bytes written, %jd bytes asked to write", to_name, (uintmax_t)nw, (uintmax_t)size); } else { errno = serrno; err(EX_OSERR, "%s", to_name); } } done_copy = 1; } if (!done_copy) { while ((nr = read(from_fd, buf, sizeof(buf))) > 0) if ((nw = write(to_fd, buf, nr)) != nr) { serrno = errno; (void)unlink(to_name); if (nw >= 0) { errx(EX_OSERR, "short write to %s: %jd bytes written, %jd bytes asked to write", to_name, (uintmax_t)nw, (uintmax_t)size); } else { errno = serrno; err(EX_OSERR, "%s", to_name); } } if (nr != 0) { serrno = errno; (void)unlink(to_name); errno = serrno; err(EX_OSERR, "%s", from_name); } } } /* * strip -- * use strip(1) to strip the target file */ static void strip(const char *to_name) { const char *stripbin; int serrno, status; switch (fork()) { case -1: serrno = errno; (void)unlink(to_name); errno = serrno; err(EX_TEMPFAIL, "fork"); case 0: stripbin = getenv("STRIPBIN"); if (stripbin == NULL) stripbin = "strip"; execlp(stripbin, stripbin, to_name, (char *)NULL); err(EX_OSERR, "exec(%s)", stripbin); default: if (wait(&status) == -1 || status) { serrno = errno; (void)unlink(to_name); errc(EX_SOFTWARE, serrno, "wait"); /* NOTREACHED */ } } } /* * install_dir -- * build directory hierarchy */ static void install_dir(char *path) { char *p; struct stat sb; int ch; for (p = path;; ++p) if (!*p || (p != path && *p == '/')) { ch = *p; *p = '\0'; if (stat(path, &sb)) { if (errno != ENOENT || mkdir(path, 0755) < 0) { err(EX_OSERR, "mkdir %s", path); /* NOTREACHED */ } else if (verbose) (void)printf("install: mkdir %s\n", path); } else if (!S_ISDIR(sb.st_mode)) errx(EX_OSERR, "%s exists but is not a directory", path); if (!(*p = ch)) break; } if ((gid != (gid_t)-1 || uid != (uid_t)-1) && chown(path, uid, gid)) warn("chown %u:%u %s", uid, gid, path); if (chmod(path, mode)) warn("chmod %o %s", mode, path); } /* * usage -- * print a usage message and die */ static void usage(void) { (void)fprintf(stderr, "usage: install [-bCcMpSsv] [-B suffix] [-f flags] [-g group] [-m mode]\n" " [-o owner] file1 file2\n" " install [-bCcMpSsv] [-B suffix] [-f flags] [-g group] [-m mode]\n" " [-o owner] file1 ... fileN directory\n" " install -d [-v] [-g group] [-m mode] [-o owner] directory ...\n"); exit(EX_USAGE); /* NOTREACHED */ } /* * trymmap -- * return true (1) if mmap should be tried, false (0) if not. */ static int trymmap(int fd) { /* * The ifdef is for bootstrapping - f_fstypename doesn't exist in * pre-Lite2-merge systems. */ #ifdef MFSNAMELEN struct statfs stfs; if (nommap || fstatfs(fd, &stfs) != 0) return (0); if (strcmp(stfs.f_fstypename, "ufs") == 0 || strcmp(stfs.f_fstypename, "cd9660") == 0) return (1); #endif return (0); }