mirror of
https://github.com/mozilla/gecko-dev.git
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508 lines
11 KiB
C
508 lines
11 KiB
C
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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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 <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 <dirent.h>
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#include <errno.h>
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#include <stdarg.h>
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#ifdef USE_REENTRANT_LIBC
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# include "libc_r.h"
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#endif /* USE_REENTRANT_LIBC */
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#include "pathsub.h"
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#define HAVE_FCHMOD
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/*
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* Does getcwd() take NULL as the first argument and malloc
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* the result buffer?
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*/
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#if !defined(DARWIN)
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# define GETCWD_CAN_MALLOC
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#endif
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#if defined(LINUX) || defined(__GNU__) || defined(__GLIBC__)
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# include <getopt.h>
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#endif
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#ifdef QNX
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# define d_ino d_stat.st_ino
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#endif
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static void usage(void) {
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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, (int)strlen(program), "");
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exit(2);
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}
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static int mkdirs(char* path, mode_t mode) {
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char* cp;
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struct stat sb;
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int res;
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while (*path == '/' && path[1] == '/') {
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path++;
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}
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for (cp = strrchr(path, '/'); cp && cp != path && cp[-1] == '/'; cp--);
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if (cp && cp != path) {
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*cp = '\0';
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if ((stat(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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res = mkdir(path, mode);
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if ((res != 0) && (errno == EEXIST)) {
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return 0;
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} else {
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return res;
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}
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}
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static uid_t touid(char* owner) {
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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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}
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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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}
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return uid;
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}
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static gid_t togid(char* group) {
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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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}
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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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}
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return gid;
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}
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int main(int argc, char** argv) {
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int onlydir, dodir, dolink, dorelsymlink, dotimes, opt, len, lplen, tdlen,
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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,
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*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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}
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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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}
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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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}
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if (!cwd) {
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#ifdef GETCWD_CAN_MALLOC
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cwd = getcwd(0, PATH_MAX);
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#else
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cwd = malloc(PATH_MAX + 1);
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cwd = getcwd(cwd, PATH_MAX);
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#endif
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}
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xchdir(todir);
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#ifdef GETCWD_CAN_MALLOC
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todir = getcwd(0, PATH_MAX);
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#else
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todir = malloc(PATH_MAX + 1);
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todir = getcwd(todir, PATH_MAX);
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#endif
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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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}
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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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}
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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) || 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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}
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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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}
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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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}
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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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}
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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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}
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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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}
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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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}
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if (cc < 0) {
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fail("cannot read from %s", name);
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}
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if (ftruncate(tofd, sb.st_size) < 0) {
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fail("cannot truncate %s", toname);
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}
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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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}
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#ifdef HAVE_FCHMOD
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if (fchmod(tofd, mode) < 0)
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#else
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if (chmod(toname, mode) < 0)
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#endif
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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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}
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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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}
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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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/*
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** Pathname subroutines.
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**
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** Brendan Eich, 8/29/95
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*/
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char* program;
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void fail(char* format, ...) {
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int error;
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va_list ap;
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#ifdef USE_REENTRANT_LIBC
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R_STRERROR_INIT_R();
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#endif
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error = errno;
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fprintf(stderr, "%s: ", program);
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va_start(ap, format);
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vfprintf(stderr, format, ap);
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va_end(ap);
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if (error)
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#ifdef USE_REENTRANT_LIBC
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R_STRERROR_R(errno);
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fprintf(stderr, ": %s", r_strerror_r);
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#else
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fprintf(stderr, ": %s", strerror(errno));
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#endif
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putc('\n', stderr);
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exit(1);
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}
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char* getcomponent(char* path, char* name) {
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if (*path == '\0') {
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return 0;
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}
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if (*path == '/') {
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*name++ = '/';
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} else {
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do {
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*name++ = *path++;
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} while (*path != '/' && *path != '\0');
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}
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*name = '\0';
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while (*path == '/') {
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path++;
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}
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return path;
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}
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char* ino2name(ino_t ino, char* dir) {
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DIR* dp;
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struct dirent* ep;
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char* name;
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dp = opendir("..");
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if (!dp) {
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fail("cannot read parent directory");
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}
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for (;;) {
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if (!(ep = readdir(dp))) {
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fail("cannot find current directory");
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}
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if (ep->d_ino == ino) {
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break;
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}
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}
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name = xstrdup(ep->d_name);
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closedir(dp);
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return name;
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}
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void* xmalloc(size_t size) {
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void* p = malloc(size);
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if (!p) {
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fail("cannot allocate %u bytes", size);
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}
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return p;
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}
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char* xstrdup(char* s) { return strcpy((char*)xmalloc(strlen(s) + 1), s); }
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char* xbasename(char* path) {
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char* cp;
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while ((cp = strrchr(path, '/')) && cp[1] == '\0') {
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*cp = '\0';
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}
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if (!cp) {
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return path;
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}
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return cp + 1;
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}
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void xchdir(char* dir) {
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if (chdir(dir) < 0) {
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fail("cannot change directory to %s", dir);
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}
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}
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int relatepaths(char* from, char* to, char* outpath) {
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char *cp, *cp2;
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int len;
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char buf[NAME_MAX];
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assert(*from == '/' && *to == '/');
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for (cp = to, cp2 = from; *cp == *cp2; cp++, cp2++)
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if (*cp == '\0') {
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break;
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}
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while (cp[-1] != '/') {
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cp--, cp2--;
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}
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if (cp - 1 == to) {
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/* closest common ancestor is /, so use full pathname */
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len = strlen(strcpy(outpath, to));
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if (outpath[len] != '/') {
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outpath[len++] = '/';
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outpath[len] = '\0';
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}
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} else {
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len = 0;
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while ((cp2 = getcomponent(cp2, buf)) != 0) {
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strcpy(outpath + len, "../");
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len += 3;
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}
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while ((cp = getcomponent(cp, buf)) != 0) {
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sprintf(outpath + len, "%s/", buf);
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len += strlen(outpath + len);
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}
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}
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return len;
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}
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void reversepath(char* inpath, char* name, int len, char* outpath) {
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char *cp, *cp2;
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char buf[NAME_MAX];
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struct stat sb;
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cp = strcpy(outpath + PATH_MAX - (len + 1), name);
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cp2 = inpath;
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while ((cp2 = getcomponent(cp2, buf)) != 0) {
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if (strcmp(buf, ".") == 0) {
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continue;
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}
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if (strcmp(buf, "..") == 0) {
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if (stat(".", &sb) < 0) {
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fail("cannot stat current directory");
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}
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name = ino2name(sb.st_ino, "..");
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len = strlen(name);
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cp -= len + 1;
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strcpy(cp, name);
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cp[len] = '/';
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free(name);
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xchdir("..");
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} else {
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cp -= 3;
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memcpy(cp, "../", 3);
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xchdir(buf);
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}
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}
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strcpy(outpath, cp);
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}
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