The Tor Browser: nsprpub/config/nsinstall.c@6474c204b198 (annotated)

nsprpub/config/nsinstall.c@6474c204b198 (annotated)

nsprpub/config/nsinstall.c

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 /*
 ** Netscape portable install command.
 **
 ** Brendan Eich, 7/20/95
 */
 #include <stdio.h>  /* OSF/1 requires this before grp.h, so put it first */
 #include <assert.h>
 #include <fcntl.h>
 #include <grp.h>
 #include <pwd.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <utime.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <dirent.h>
 #include <errno.h>
 #include <stdarg.h>
 #ifdef USE_REENTRANT_LIBC
 #include "libc_r.h"
 #endif /* USE_REENTRANT_LIBC */
 #include "pathsub.h"
 #define HAVE_FCHMOD
 #if defined(BEOS)
 #undef HAVE_FCHMOD
 #endif
 /*
  * Does getcwd() take NULL as the first argument and malloc
  * the result buffer?
  */
 #if !defined(DARWIN)
 #define GETCWD_CAN_MALLOC
 #endif
 #if defined(LINUX) || defined(__GNU__) || defined(__GLIBC__)
 #include <getopt.h>
 #endif
 #if defined(SCO) || defined(UNIXWARE)
 #if !defined(S_ISLNK) && defined(S_IFLNK)
 #define S_ISLNK(a)	(((a) & S_IFMT) == S_IFLNK)
 #endif
 #endif
 #ifdef QNX
 #define d_ino d_stat.st_ino
 #endif
 static void
 usage(void)
 {
     fprintf(stderr,
 	"usage: %s [-C cwd] [-L linkprefix] [-m mode] [-o owner] [-g group]\n"
 	"       %*s [-DdltR] file [file ...] directory\n",
 	program, (int)strlen(program), "");
     exit(2);
 }
 static int
 mkdirs(char *path, mode_t mode)
 {
     char *cp;
     struct stat sb;
     int res;
     while (*path == '/' && path[1] == '/')
 	path++;
     for (cp = strrchr(path, '/'); cp && cp != path && cp[-1] == '/'; cp--)
 	;
     if (cp && cp != path) {
 	*cp = '\0';
 	if ((stat(path, &sb) < 0 || !S_ISDIR(sb.st_mode)) &&
 	    mkdirs(path, mode) < 0) {
 	    return -1;
 	}
 	*cp = '/';
     }
     res = mkdir(path, mode);
     if ((res != 0) && (errno == EEXIST))
 	return 0;
      else
 	return res;
 }
 static uid_t
 touid(char *owner)
 {
     struct passwd *pw;
     uid_t uid;
     char *cp;
     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;
     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;
 }
 int
 main(int argc, char **argv)
 {
     int onlydir, dodir, dolink, dorelsymlink, dotimes, opt, len, lplen, tdlen, bnlen, exists, fromfd, tofd, cc, wc;
     mode_t mode = 0755;
     char *linkprefix, *owner, *group, *cp, *cwd, *todir, *toname, *name, *base, *linkname, *bp, buf[BUFSIZ];
     uid_t uid;
     gid_t gid;
     struct stat sb, tosb;
     struct utimbuf utb;
     program = argv[0];
     cwd = linkname = linkprefix = owner = group = 0;
     onlydir = dodir = dolink = dorelsymlink = dotimes = lplen = 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 make directory %s", todir);
     }
     if (onlydir)
 	return 0;
     if (!cwd) {
 #ifdef GETCWD_CAN_MALLOC
 	cwd = getcwd(0, PATH_MAX);
 #else
 	cwd = malloc(PATH_MAX + 1);
 	cwd = getcwd(cwd, PATH_MAX);
 #endif
     }
     xchdir(todir);
 #ifdef GETCWD_CAN_MALLOC
     todir = getcwd(0, PATH_MAX);
 #else
     todir = malloc(PATH_MAX + 1);
     todir = getcwd(todir, PATH_MAX);
 #endif
     xchdir(cwd);
     tdlen = strlen(todir);
     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);
 	exists = (lstat(toname, &tosb) == 0);
 	if (dodir) {
 	    /* -d means create a directory, always */
 	    if (exists && !S_ISDIR(tosb.st_mode)) {
 		(void) unlink(toname);
 		exists = 0;
 	    }
 	    if (!exists && mkdir(toname, mode) < 0)
 		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)) {
 		(void) (S_ISDIR(tosb.st_mode) ? rmdir : unlink)(toname);
 		exists = 0;
 	    }
 	    if (!exists && symlink(name, toname) < 0)
 		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))
 		(void) (S_ISDIR(tosb.st_mode) ? rmdir : unlink)(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);
 	    }
 #ifdef HAVE_FCHMOD
 	    if (fchmod(tofd, mode) < 0)
 #else
 	    if (chmod(toname, mode) < 0)
 #endif
 		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("cannot write to %s", toname);
 	    close(fromfd);
 	}
 	free(toname);
     }
     free(cwd);
     free(todir);
     return 0;
 }
 /*
 ** Pathname subroutines.
 **
 ** Brendan Eich, 8/29/95
 */
 char *program;
 void
 fail(char *format, ...)
 {
     int error;
     va_list ap;
 #ifdef USE_REENTRANT_LIBC
     R_STRERROR_INIT_R();
 #endif
     error = errno;
     fprintf(stderr, "%s: ", program);
     va_start(ap, format);
     vfprintf(stderr, format, ap);
     va_end(ap);
     if (error)
 #ifdef USE_REENTRANT_LIBC
     R_STRERROR_R(errno);
 	fprintf(stderr, ": %s", r_strerror_r);
 #else
 	fprintf(stderr, ": %s", strerror(errno));
 #endif
     putc('\n', stderr);
     exit(1);
 }
 char *
 getcomponent(char *path, char *name)
 {
     if (*path == '\0')
 	return 0;
     if (*path == '/') {
 	*name++ = '/';
     } else {
 	do {
 	    *name++ = *path++;
 	} while (*path != '/' && *path != '\0');
     }
     *name = '\0';
     while (*path == '/')
 	path++;
     return path;
 }
 #ifdef UNIXWARE_READDIR_BUFFER_TOO_SMALL
 /* Sigh.  The static buffer in Unixware's readdir is too small. */
 struct dirent * readdir(DIR *d)
 {
         static struct dirent *buf = NULL;
 #define MAX_PATH_LEN 1024
         if(buf == NULL)
                 buf = (struct dirent *) malloc(sizeof(struct dirent) + MAX_PATH_LEN)
 ;
         return(readdir_r(d, buf));
 }
 #endif
 char *
 ino2name(ino_t ino, char *dir)
 {
     DIR *dp;
     struct dirent *ep;
     char *name;
     dp = opendir("..");
     if (!dp)
 	fail("cannot read parent directory");
     for (;;) {
 	if (!(ep = readdir(dp)))
 	    fail("cannot find current directory");
 	if (ep->d_ino == ino)
 	    break;
     }
     name = xstrdup(ep->d_name);
     closedir(dp);
     return name;
 }
 void *
 xmalloc(size_t size)
 {
     void *p = malloc(size);
     if (!p)
 	fail("cannot allocate %u bytes", size);
     return p;
 }
 char *
 xstrdup(char *s)
 {
     return strcpy((char*)xmalloc(strlen(s) + 1), s);
 }
 char *
 xbasename(char *path)
 {
     char *cp;
     while ((cp = strrchr(path, '/')) && cp[1] == '\0')
 	*cp = '\0';
     if (!cp) return path;
     return cp + 1;
 }
 void
 xchdir(char *dir)
 {
     if (chdir(dir) < 0)
 	fail("cannot change directory to %s", dir);
 }
 int
 relatepaths(char *from, char *to, char *outpath)
 {
     char *cp, *cp2;
     int len;
     char buf[NAME_MAX];
     assert(*from == '/' && *to == '/');
     for (cp = to, cp2 = from; *cp == *cp2; cp++, cp2++)
 	if (*cp == '\0')
 	    break;
     while (cp[-1] != '/')
 	cp--, cp2--;
     if (cp - 1 == to) {
 	/* closest common ancestor is /, so use full pathname */
 	len = strlen(strcpy(outpath, to));
 	if (outpath[len] != '/') {
 	    outpath[len++] = '/';
 	    outpath[len] = '\0';
 	}
     } else {
 	len = 0;
 	while ((cp2 = getcomponent(cp2, buf)) != 0) {
 	    strcpy(outpath + len, "../");
 	    len += 3;
 	}
 	while ((cp = getcomponent(cp, buf)) != 0) {
 	    sprintf(outpath + len, "%s/", buf);
 	    len += strlen(outpath + len);
 	}
     }
     return len;
 }
 void
 reversepath(char *inpath, char *name, int len, char *outpath)
 {
     char *cp, *cp2;
     char buf[NAME_MAX];
     struct stat sb;
     cp = strcpy(outpath + PATH_MAX - (len + 1), name);
     cp2 = inpath;
     while ((cp2 = getcomponent(cp2, buf)) != 0) {
 	if (strcmp(buf, ".") == 0)
 	    continue;
 	if (strcmp(buf, "..") == 0) {
 	    if (stat(".", &sb) < 0)
 		fail("cannot stat current directory");
 	    name = ino2name(sb.st_ino, "..");
 	    len = strlen(name);
 	    cp -= len + 1;
 	    strcpy(cp, name);
 	    cp[len] = '/';
 	    free(name);
 	    xchdir("..");
 	} else {
 	    cp -= 3;
 	    strncpy(cp, "../", 3);
 	    xchdir(buf);
 	}
     }
     strcpy(outpath, cp);
 }

The Tor Browser / annotate

nsprpub/config/nsinstall.c@6474c204b198 (annotated)

nsprpub/config/nsinstall.c