nsinstall.c
上传用户:lyxiangda
上传日期:2007-01-12
资源大小:3042k
文件大小:10k
- /*
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is the Netscape security libraries.
- *
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1994-2000 Netscape Communications Corporation. All
- * Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
- /*
- ** Netscape portable install command.
- */
- #include <stdio.h> /* OSF/1 requires this before grp.h, so put it first */
- #include <assert.h>
- #include <fcntl.h>
- #include <string.h>
- #if defined(_WINDOWS)
- #include <windows.h>
- typedef unsigned int mode_t;
- #else
- #include <grp.h>
- #include <pwd.h>
- #include <errno.h>
- #include <stdlib.h>
- #include <unistd.h>
- #include <utime.h>
- #endif
- #include <sys/types.h>
- #include <sys/stat.h>
- #include "pathsub.h"
- #define HAVE_LCHOWN
- #if defined(AIX) || defined(BSDI) || defined(HPUX) || defined(LINUX) || defined(SUNOS4) || defined(SCO) || defined(UNIXWARE)
- #undef HAVE_LCHOWN
- #endif
- #ifdef LINUX
- #include <getopt.h>
- #endif
- #if defined(SCO) || defined(UNIXWARE) || defined(SNI) || defined(NCR) || defined(NEC)
- #if !defined(S_ISLNK) && defined(S_IFLNK)
- #define S_ISLNK(a) (((a) & S_IFMT) == S_IFLNK)
- #endif
- #endif
- #if defined(SNI)
- extern int fchmod(int fildes, mode_t mode);
- #endif
- static void
- usage(void)
- {
- fprintf(stderr,
- "usage: %s [-C cwd] [-L linkprefix] [-m mode] [-o owner] [-g group]n"
- " %*s [-DdltR] file [file ...] directoryn",
- program, strlen(program), "");
- exit(2);
- }
- /* this is more-or-less equivalent to mkdir -p */
- static int
- mkdirs(char *path, mode_t mode)
- {
- char * cp;
- int rv;
- struct stat sb;
-
- if (!path || !path[0])
- fail("Null pointer or empty string passed to mkdirs()");
- while (*path == '/' && path[1] == '/')
- path++;
- while ((cp = strrchr(path, '/')) && cp[1] == ' ')
- *cp = ' ';
- if (cp && cp != path) {
- *cp = ' ';
- if ((stat(path, &sb) < 0 || !S_ISDIR(sb.st_mode)) &&
- mkdirs(path, mode) < 0) {
- return -1;
- }
- *cp = '/';
- }
- rv = mkdir(path, mode);
- if (rv) {
- if (errno != EEXIST)
- fail("mkdirs cannot make %s", path);
- fprintf(stderr, "directory creation race: %sn", path);
- if (!stat(path, &sb) && S_ISDIR(sb.st_mode))
- rv = 0;
- }
- return rv;
- }
- static uid_t
- touid(char *owner)
- {
- struct passwd *pw;
- uid_t uid;
- char *cp;
- if (!owner || !owner[0])
- fail("Null pointer or empty string passed to touid()");
- pw = getpwnam(owner);
- if (pw)
- return pw->pw_uid;
- uid = strtol(owner, &cp, 0);
- if (uid == 0 && cp == owner)
- fail("cannot find uid for %s", owner);
- return uid;
- }
- static gid_t
- togid(char *group)
- {
- struct group *gr;
- gid_t gid;
- char *cp;
- if (!group || !group[0])
- fail("Null pointer or empty string passed to togid()");
- gr = getgrnam(group);
- if (gr)
- return gr->gr_gid;
- gid = strtol(group, &cp, 0);
- if (gid == 0 && cp == group)
- fail("cannot find gid for %s", group);
- return gid;
- }
- void * const uninit = (void *)0xdeadbeef;
- int
- main(int argc, char **argv)
- {
- char * base = uninit;
- char * bp = uninit;
- char * cp = uninit;
- char * cwd = 0;
- char * group = 0;
- char * linkname = 0;
- char * linkprefix = 0;
- char * name = uninit;
- char * owner = 0;
- char * todir = uninit;
- char * toname = uninit;
- int bnlen = -1;
- int cc = 0;
- int dodir = 0;
- int dolink = 0;
- int dorelsymlink = 0;
- int dotimes = 0;
- int exists = 0;
- int fromfd = -1;
- int len = -1;
- int lplen = 0;
- int onlydir = 0;
- int opt = -1;
- int tdlen = -1;
- int tofd = -1;
- int wc = -1;
- mode_t mode = 0755;
- uid_t uid = -1;
- gid_t gid = -1;
- struct stat sb;
- struct stat tosb;
- struct utimbuf utb;
- char buf[BUFSIZ];
- program = strrchr(argv[0], '/');
- if (!program)
- program = strrchr(argv[0], '\');
- program = program ? program+1 : argv[0];
- while ((opt = getopt(argc, argv, "C:DdlL:Rm:o:g:t")) != EOF) {
- switch (opt) {
- case 'C': cwd = optarg; break;
- case 'D': onlydir = 1; break;
- case 'd': dodir = 1; break;
- case 'l': dolink = 1; break;
- case 'L':
- linkprefix = optarg;
- lplen = strlen(linkprefix);
- dolink = 1;
- break;
- case 'R': dolink = dorelsymlink = 1; break;
- case 'm':
- mode = strtoul(optarg, &cp, 8);
- if (mode == 0 && cp == optarg)
- usage();
- break;
- case 'o': owner = optarg; break;
- case 'g': group = optarg; break;
- case 't': dotimes = 1; break;
- default: usage();
- }
- }
- argc -= optind;
- argv += optind;
- if (argc < 2 - onlydir)
- usage();
- todir = argv[argc-1];
- if ((stat(todir, &sb) < 0 || !S_ISDIR(sb.st_mode)) &&
- mkdirs(todir, 0777) < 0) {
- fail("cannot mkdir -p %s", todir);
- }
- if (onlydir)
- return 0;
- if (!cwd) {
- cwd = getcwd(0, PATH_MAX);
- if (!cwd)
- fail("could not get CWD");
- }
- /* make sure we can get into todir. */
- xchdir(todir);
- todir = getcwd(0, PATH_MAX);
- if (!todir)
- fail("could not get CWD in todir");
- tdlen = strlen(todir);
- /* back to original directory. */
- xchdir(cwd);
- uid = owner ? touid(owner) : -1;
- gid = group ? togid(group) : -1;
- while (--argc > 0) {
- name = *argv++;
- len = strlen(name);
- base = xbasename(name);
- bnlen = strlen(base);
- toname = (char*)xmalloc(tdlen + 1 + bnlen + 1);
- sprintf(toname, "%s/%s", todir, base);
- retry:
- exists = (lstat(toname, &tosb) == 0);
- if (dodir) {
- /* -d means create a directory, always */
- if (exists && !S_ISDIR(tosb.st_mode)) {
- int rv = unlink(toname);
- if (rv)
- fail("cannot unlink %s", toname);
- exists = 0;
- }
- if (!exists && mkdir(toname, mode) < 0) {
- /* we probably have two nsinstall programs in a race here. */
- if (errno == EEXIST && !stat(toname, &sb) &&
- S_ISDIR(sb.st_mode)) {
- fprintf(stderr, "directory creation race: %sn", toname);
- goto retry;
- }
- fail("cannot make directory %s", toname);
- }
- if ((owner || group) && chown(toname, uid, gid) < 0)
- fail("cannot change owner of %s", toname);
- } else if (dolink) {
- if (*name == '/') {
- /* source is absolute pathname, link to it directly */
- linkname = 0;
- } else {
- if (linkprefix) {
- /* -L implies -l and prefixes names with a $cwd arg. */
- len += lplen + 1;
- linkname = (char*)xmalloc(len + 1);
- sprintf(linkname, "%s/%s", linkprefix, name);
- } else if (dorelsymlink) {
- /* Symlink the relative path from todir to source name. */
- linkname = (char*)xmalloc(PATH_MAX);
- if (*todir == '/') {
- /* todir is absolute: skip over common prefix. */
- lplen = relatepaths(todir, cwd, linkname);
- strcpy(linkname + lplen, name);
- } else {
- /* todir is named by a relative path: reverse it. */
- reversepath(todir, name, len, linkname);
- xchdir(cwd);
- }
- len = strlen(linkname);
- }
- name = linkname;
- }
- /* Check for a pre-existing symlink with identical content. */
- if (exists &&
- (!S_ISLNK(tosb.st_mode) ||
- readlink(toname, buf, sizeof buf) != len ||
- strncmp(buf, name, len) != 0)) {
- int rmrv;
- rmrv = (S_ISDIR(tosb.st_mode) ? rmdir : unlink)(toname);
- if (rmrv < 0) {
- fail("destination exists, cannot remove %s", toname);
- }
- exists = 0;
- }
- if (!exists && symlink(name, toname) < 0) {
- if (errno == EEXIST) {
- fprintf(stderr, "symlink creation race: %sn", toname);
- goto retry;
- }
- diagnosePath(toname);
- fail("cannot make symbolic link %s", toname);
- }
- #ifdef HAVE_LCHOWN
- if ((owner || group) && lchown(toname, uid, gid) < 0)
- fail("cannot change owner of %s", toname);
- #endif
- if (linkname) {
- free(linkname);
- linkname = 0;
- }
- } else {
- /* Copy from name to toname, which might be the same file. */
- fromfd = open(name, O_RDONLY);
- if (fromfd < 0 || fstat(fromfd, &sb) < 0)
- fail("cannot access %s", name);
- if (exists &&
- (!S_ISREG(tosb.st_mode) || access(toname, W_OK) < 0)) {
- int rmrv;
- rmrv = (S_ISDIR(tosb.st_mode) ? rmdir : unlink)(toname);
- if (rmrv < 0) {
- fail("destination exists, cannot remove %s", toname);
- }
- }
- tofd = open(toname, O_CREAT | O_WRONLY, 0666);
- if (tofd < 0)
- fail("cannot create %s", toname);
- bp = buf;
- while ((cc = read(fromfd, bp, sizeof buf)) > 0) {
- while ((wc = write(tofd, bp, cc)) > 0) {
- if ((cc -= wc) == 0)
- break;
- bp += wc;
- }
- if (wc < 0)
- fail("cannot write to %s", toname);
- }
- if (cc < 0)
- fail("cannot read from %s", name);
- if (ftruncate(tofd, sb.st_size) < 0)
- fail("cannot truncate %s", toname);
- if (dotimes) {
- utb.actime = sb.st_atime;
- utb.modtime = sb.st_mtime;
- if (utime(toname, &utb) < 0)
- fail("cannot set times of %s", toname);
- }
- if (fchmod(tofd, mode) < 0)
- fail("cannot change mode of %s", toname);
- if ((owner || group) && fchown(tofd, uid, gid) < 0)
- fail("cannot change owner of %s", toname);
- /* Must check for delayed (NFS) write errors on close. */
- if (close(tofd) < 0)
- fail("close reports write error on %s", toname);
- close(fromfd);
- }
- free(toname);
- }
- free(cwd);
- free(todir);
- return 0;
- }