зеркало из https://github.com/mozilla/pjs.git
322 строки
7.7 KiB
C
322 строки
7.7 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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/*
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** Netscape portable install command.
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**
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** Brendan Eich, 7/20/95
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*/
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#include <stdio.h> /* OSF/1 requires this before grp.h, so put it first */
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#include <assert.h>
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#include <fcntl.h>
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#include <grp.h>
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#include <pwd.h>
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#include <stdio.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 <utime.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "pathsub.h"
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#define HAVE_LCHOWN
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#if defined(AIX) || defined(BSDI) || defined(HPUX) || defined(LINUX) || defined(SUNOS4) || defined(SCO) || defined(UNIXWARE)
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#undef HAVE_LCHOWN
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#endif
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#ifdef LINUX
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#include <getopt.h>
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#endif
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#if defined(SCO) || defined(UNIXWARE) || defined(SNI) || defined(NCR) || defined(NEC)
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#if !defined(S_ISLNK) && defined(S_IFLNK)
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#define S_ISLNK(a) (((a) & S_IFMT) == S_IFLNK)
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#endif
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#endif
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#if defined(SNI)
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extern int fchmod(int fildes, mode_t mode);
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#endif
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static void
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usage(void)
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{
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fprintf(stderr,
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"usage: %s [-C cwd] [-L linkprefix] [-m mode] [-o owner] [-g group]\n"
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" %*s [-DdltR] file [file ...] directory\n",
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program, strlen(program), "");
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exit(2);
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}
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static int
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mkdirs(char *path, mode_t mode)
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{
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char *cp;
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struct stat sb;
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while (*path == '/' && path[1] == '/')
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path++;
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while ((cp = strrchr(path, '/')) && cp[1] == '\0')
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*cp = '\0';
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if (cp && cp != path) {
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*cp = '\0';
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if ((lstat(path, &sb) < 0 || !S_ISDIR(sb.st_mode)) &&
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mkdirs(path, mode) < 0) {
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return -1;
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}
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*cp = '/';
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}
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return mkdir(path, mode);
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}
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static uid_t
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touid(char *owner)
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{
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struct passwd *pw;
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uid_t uid;
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char *cp;
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pw = getpwnam(owner);
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if (pw)
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return pw->pw_uid;
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uid = strtol(owner, &cp, 0);
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if (uid == 0 && cp == owner)
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fail("cannot find uid for %s", owner);
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return uid;
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}
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static gid_t
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togid(char *group)
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{
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struct group *gr;
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gid_t gid;
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char *cp;
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gr = getgrnam(group);
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if (gr)
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return gr->gr_gid;
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gid = strtol(group, &cp, 0);
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if (gid == 0 && cp == group)
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fail("cannot find gid for %s", group);
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return gid;
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}
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int
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main(int argc, char **argv)
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{
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int onlydir, dodir, dolink, dorelsymlink, dotimes, opt, len, lplen, tdlen, bnlen, exists, fromfd, tofd, cc, wc;
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mode_t mode = 0755;
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char *linkprefix, *owner, *group, *cp, *cwd, *todir, *toname, *name, *base, *linkname, *bp, buf[BUFSIZ];
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uid_t uid;
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gid_t gid;
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struct stat sb, tosb;
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struct utimbuf utb;
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program = argv[0];
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cwd = linkname = linkprefix = owner = group = 0;
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onlydir = dodir = dolink = dorelsymlink = dotimes = lplen = 0;
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while ((opt = getopt(argc, argv, "C:DdlL:Rm:o:g:t")) != EOF) {
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switch (opt) {
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case 'C':
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cwd = optarg;
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break;
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case 'D':
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onlydir = 1;
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break;
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case 'd':
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dodir = 1;
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break;
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case 'l':
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dolink = 1;
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break;
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case 'L':
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linkprefix = optarg;
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lplen = strlen(linkprefix);
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dolink = 1;
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break;
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case 'R':
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dolink = dorelsymlink = 1;
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break;
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case 'm':
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mode = strtoul(optarg, &cp, 8);
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if (mode == 0 && cp == optarg)
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usage();
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break;
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case 'o':
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owner = optarg;
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break;
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case 'g':
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group = optarg;
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break;
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case 't':
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dotimes = 1;
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (argc < 2 - onlydir)
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usage();
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todir = argv[argc-1];
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if ((stat(todir, &sb) < 0 || !S_ISDIR(sb.st_mode)) &&
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mkdirs(todir, 0777) < 0) {
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fail("cannot make directory %s", todir);
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}
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if (onlydir)
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return 0;
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if (!cwd)
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cwd = getcwd(0, PATH_MAX);
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xchdir(todir);
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todir = getcwd(0, PATH_MAX);
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tdlen = strlen(todir);
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xchdir(cwd);
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tdlen = strlen(todir);
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uid = owner ? touid(owner) : -1;
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gid = group ? togid(group) : -1;
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while (--argc > 0) {
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name = *argv++;
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len = strlen(name);
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base = xbasename(name);
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bnlen = strlen(base);
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toname = (char*)xmalloc(tdlen + 1 + bnlen + 1);
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sprintf(toname, "%s/%s", todir, base);
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exists = (lstat(toname, &tosb) == 0);
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if (dodir) {
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/* -d means create a directory, always */
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if (exists && !S_ISDIR(tosb.st_mode)) {
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(void) unlink(toname);
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exists = 0;
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}
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if (!exists && mkdir(toname, mode) < 0)
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fail("cannot make directory %s", toname);
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if ((owner || group) && chown(toname, uid, gid) < 0)
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fail("cannot change owner of %s", toname);
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} else if (dolink) {
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if (*name == '/') {
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/* source is absolute pathname, link to it directly */
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linkname = 0;
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} else {
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if (linkprefix) {
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/* -L implies -l and prefixes names with a $cwd arg. */
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len += lplen + 1;
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linkname = (char*)xmalloc(len + 1);
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sprintf(linkname, "%s/%s", linkprefix, name);
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} else if (dorelsymlink) {
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/* Symlink the relative path from todir to source name. */
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linkname = (char*)xmalloc(PATH_MAX);
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if (*todir == '/') {
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/* todir is absolute: skip over common prefix. */
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lplen = relatepaths(todir, cwd, linkname);
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strcpy(linkname + lplen, name);
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} else {
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/* todir is named by a relative path: reverse it. */
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reversepath(todir, name, len, linkname);
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xchdir(cwd);
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}
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len = strlen(linkname);
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}
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name = linkname;
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}
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/* Check for a pre-existing symlink with identical content. */
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if (exists &&
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(!S_ISLNK(tosb.st_mode) ||
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readlink(toname, buf, sizeof buf) != len ||
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strncmp(buf, name, len) != 0)) {
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(void) (S_ISDIR(tosb.st_mode) ? rmdir : unlink)(toname);
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exists = 0;
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}
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if (!exists && symlink(name, toname) < 0)
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fail("cannot make symbolic link %s", toname);
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#ifdef HAVE_LCHOWN
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if ((owner || group) && lchown(toname, uid, gid) < 0)
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fail("cannot change owner of %s", toname);
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#endif
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if (linkname) {
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free(linkname);
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linkname = 0;
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}
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} else {
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/* Copy from name to toname, which might be the same file. */
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fromfd = open(name, O_RDONLY);
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if (fromfd < 0 || fstat(fromfd, &sb) < 0)
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fail("cannot access %s", name);
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if (exists && (!S_ISREG(tosb.st_mode) || access(toname, W_OK) < 0))
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(void) (S_ISDIR(tosb.st_mode) ? rmdir : unlink)(toname);
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tofd = open(toname, O_CREAT | O_WRONLY, 0666);
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if (tofd < 0)
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fail("cannot create %s", toname);
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bp = buf;
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while ((cc = read(fromfd, bp, sizeof buf)) > 0) {
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while ((wc = write(tofd, bp, cc)) > 0) {
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if ((cc -= wc) == 0)
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break;
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bp += wc;
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}
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if (wc < 0)
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fail("cannot write to %s", toname);
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}
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if (cc < 0)
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fail("cannot read from %s", name);
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if (ftruncate(tofd, sb.st_size) < 0)
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fail("cannot truncate %s", toname);
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if (dotimes) {
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utb.actime = sb.st_atime;
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utb.modtime = sb.st_mtime;
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if (utime(toname, &utb) < 0)
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fail("cannot set times of %s", toname);
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}
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if (fchmod(tofd, mode) < 0)
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fail("cannot change mode of %s", toname);
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if ((owner || group) && fchown(tofd, uid, gid) < 0)
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fail("cannot change owner of %s", toname);
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/* Must check for delayed (NFS) write errors on close. */
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if (close(tofd) < 0)
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fail("cannot write to %s", toname);
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close(fromfd);
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}
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free(toname);
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}
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free(cwd);
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free(todir);
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return 0;
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}
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