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comparison: nsprpub/config/nsinstall.c

nsprpub/config/nsinstall.c

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TOR_BUG_9701
changeset 8
97036ab72558
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-1:000000000000 0:526a6a392565
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5
6 /*
7 ** Netscape portable install command.
8 **
9 ** Brendan Eich, 7/20/95
10 */
11 #include <stdio.h> /* OSF/1 requires this before grp.h, so put it first */
12 #include <assert.h>
13 #include <fcntl.h>
14 #include <grp.h>
15 #include <pwd.h>
16 #include <stdlib.h>
17 #include <string.h>
18 #include <unistd.h>
19 #include <utime.h>
20 #include <sys/types.h>
21 #include <sys/stat.h>
22 #include <dirent.h>
23 #include <errno.h>
24 #include <stdarg.h>
25 #ifdef USE_REENTRANT_LIBC
26 #include "libc_r.h"
27 #endif /* USE_REENTRANT_LIBC */
28
29 #include "pathsub.h"
30
31 #define HAVE_FCHMOD
32
33 #if defined(BEOS)
34 #undef HAVE_FCHMOD
35 #endif
36
37 /*
38 * Does getcwd() take NULL as the first argument and malloc
39 * the result buffer?
40 */
41 #if !defined(DARWIN)
42 #define GETCWD_CAN_MALLOC
43 #endif
44
45 #if defined(LINUX) || defined(__GNU__) || defined(__GLIBC__)
46 #include <getopt.h>
47 #endif
48
49 #if defined(SCO) || defined(UNIXWARE)
50 #if !defined(S_ISLNK) && defined(S_IFLNK)
51 #define S_ISLNK(a) (((a) & S_IFMT) == S_IFLNK)
52 #endif
53 #endif
54
55 #ifdef QNX
56 #define d_ino d_stat.st_ino
57 #endif
58
59 static void
60 usage(void)
61 {
62 fprintf(stderr,
63 "usage: %s [-C cwd] [-L linkprefix] [-m mode] [-o owner] [-g group]\n"
64 " %*s [-DdltR] file [file ...] directory\n",
65 program, (int)strlen(program), "");
66 exit(2);
67 }
68
69 static int
70 mkdirs(char *path, mode_t mode)
71 {
72 char *cp;
73 struct stat sb;
74 int res;
75
76 while (*path == '/' && path[1] == '/')
77 path++;
78 for (cp = strrchr(path, '/'); cp && cp != path && cp[-1] == '/'; cp--)
79 ;
80 if (cp && cp != path) {
81 *cp = '\0';
82 if ((stat(path, &sb) < 0 || !S_ISDIR(sb.st_mode)) &&
83 mkdirs(path, mode) < 0) {
84 return -1;
85 }
86 *cp = '/';
87 }
88 res = mkdir(path, mode);
89 if ((res != 0) && (errno == EEXIST))
90 return 0;
91 else
92 return res;
93 }
94
95 static uid_t
96 touid(char *owner)
97 {
98 struct passwd *pw;
99 uid_t uid;
100 char *cp;
101
102 pw = getpwnam(owner);
103 if (pw)
104 return pw->pw_uid;
105 uid = strtol(owner, &cp, 0);
106 if (uid == 0 && cp == owner)
107 fail("cannot find uid for %s", owner);
108 return uid;
109 }
110
111 static gid_t
112 togid(char *group)
113 {
114 struct group *gr;
115 gid_t gid;
116 char *cp;
117
118 gr = getgrnam(group);
119 if (gr)
120 return gr->gr_gid;
121 gid = strtol(group, &cp, 0);
122 if (gid == 0 && cp == group)
123 fail("cannot find gid for %s", group);
124 return gid;
125 }
126
127 int
128 main(int argc, char **argv)
129 {
130 int onlydir, dodir, dolink, dorelsymlink, dotimes, opt, len, lplen, tdlen, bnlen, exists, fromfd, tofd, cc, wc;
131 mode_t mode = 0755;
132 char *linkprefix, *owner, *group, *cp, *cwd, *todir, *toname, *name, *base, *linkname, *bp, buf[BUFSIZ];
133 uid_t uid;
134 gid_t gid;
135 struct stat sb, tosb;
136 struct utimbuf utb;
137
138 program = argv[0];
139 cwd = linkname = linkprefix = owner = group = 0;
140 onlydir = dodir = dolink = dorelsymlink = dotimes = lplen = 0;
141
142 while ((opt = getopt(argc, argv, "C:DdlL:Rm:o:g:t")) != EOF) {
143 switch (opt) {
144 case 'C':
145 cwd = optarg;
146 break;
147 case 'D':
148 onlydir = 1;
149 break;
150 case 'd':
151 dodir = 1;
152 break;
153 case 'l':
154 dolink = 1;
155 break;
156 case 'L':
157 linkprefix = optarg;
158 lplen = strlen(linkprefix);
159 dolink = 1;
160 break;
161 case 'R':
162 dolink = dorelsymlink = 1;
163 break;
164 case 'm':
165 mode = strtoul(optarg, &cp, 8);
166 if (mode == 0 && cp == optarg)
167 usage();
168 break;
169 case 'o':
170 owner = optarg;
171 break;
172 case 'g':
173 group = optarg;
174 break;
175 case 't':
176 dotimes = 1;
177 break;
178 default:
179 usage();
180 }
181 }
182
183 argc -= optind;
184 argv += optind;
185 if (argc < 2 - onlydir)
186 usage();
187
188 todir = argv[argc-1];
189 if ((stat(todir, &sb) < 0 || !S_ISDIR(sb.st_mode)) &&
190 mkdirs(todir, 0777) < 0) {
191 fail("cannot make directory %s", todir);
192 }
193 if (onlydir)
194 return 0;
195
196 if (!cwd) {
197 #ifdef GETCWD_CAN_MALLOC
198 cwd = getcwd(0, PATH_MAX);
199 #else
200 cwd = malloc(PATH_MAX + 1);
201 cwd = getcwd(cwd, PATH_MAX);
202 #endif
203 }
204 xchdir(todir);
205 #ifdef GETCWD_CAN_MALLOC
206 todir = getcwd(0, PATH_MAX);
207 #else
208 todir = malloc(PATH_MAX + 1);
209 todir = getcwd(todir, PATH_MAX);
210 #endif
211 xchdir(cwd);
212 tdlen = strlen(todir);
213
214 uid = owner ? touid(owner) : -1;
215 gid = group ? togid(group) : -1;
216
217 while (--argc > 0) {
218 name = *argv++;
219 len = strlen(name);
220 base = xbasename(name);
221 bnlen = strlen(base);
222 toname = (char*)xmalloc(tdlen + 1 + bnlen + 1);
223 sprintf(toname, "%s/%s", todir, base);
224 exists = (lstat(toname, &tosb) == 0);
225
226 if (dodir) {
227 /* -d means create a directory, always */
228 if (exists && !S_ISDIR(tosb.st_mode)) {
229 (void) unlink(toname);
230 exists = 0;
231 }
232 if (!exists && mkdir(toname, mode) < 0)
233 fail("cannot make directory %s", toname);
234 if ((owner || group) && chown(toname, uid, gid) < 0)
235 fail("cannot change owner of %s", toname);
236 } else if (dolink) {
237 if (*name == '/') {
238 /* source is absolute pathname, link to it directly */
239 linkname = 0;
240 } else {
241 if (linkprefix) {
242 /* -L implies -l and prefixes names with a $cwd arg. */
243 len += lplen + 1;
244 linkname = (char*)xmalloc(len + 1);
245 sprintf(linkname, "%s/%s", linkprefix, name);
246 } else if (dorelsymlink) {
247 /* Symlink the relative path from todir to source name. */
248 linkname = (char*)xmalloc(PATH_MAX);
249
250 if (*todir == '/') {
251 /* todir is absolute: skip over common prefix. */
252 lplen = relatepaths(todir, cwd, linkname);
253 strcpy(linkname + lplen, name);
254 } else {
255 /* todir is named by a relative path: reverse it. */
256 reversepath(todir, name, len, linkname);
257 xchdir(cwd);
258 }
259
260 len = strlen(linkname);
261 }
262 name = linkname;
263 }
264
265 /* Check for a pre-existing symlink with identical content. */
266 if (exists &&
267 (!S_ISLNK(tosb.st_mode) ||
268 readlink(toname, buf, sizeof buf) != len ||
269 strncmp(buf, name, len) != 0)) {
270 (void) (S_ISDIR(tosb.st_mode) ? rmdir : unlink)(toname);
271 exists = 0;
272 }
273 if (!exists && symlink(name, toname) < 0)
274 fail("cannot make symbolic link %s", toname);
275 #ifdef HAVE_LCHOWN
276 if ((owner || group) && lchown(toname, uid, gid) < 0)
277 fail("cannot change owner of %s", toname);
278 #endif
279
280 if (linkname) {
281 free(linkname);
282 linkname = 0;
283 }
284 } else {
285 /* Copy from name to toname, which might be the same file. */
286 fromfd = open(name, O_RDONLY);
287 if (fromfd < 0 || fstat(fromfd, &sb) < 0)
288 fail("cannot access %s", name);
289 if (exists && (!S_ISREG(tosb.st_mode) || access(toname, W_OK) < 0))
290 (void) (S_ISDIR(tosb.st_mode) ? rmdir : unlink)(toname);
291 tofd = open(toname, O_CREAT | O_WRONLY, 0666);
292 if (tofd < 0)
293 fail("cannot create %s", toname);
294
295 bp = buf;
296 while ((cc = read(fromfd, bp, sizeof buf)) > 0) {
297 while ((wc = write(tofd, bp, cc)) > 0) {
298 if ((cc -= wc) == 0)
299 break;
300 bp += wc;
301 }
302 if (wc < 0)
303 fail("cannot write to %s", toname);
304 }
305 if (cc < 0)
306 fail("cannot read from %s", name);
307
308 if (ftruncate(tofd, sb.st_size) < 0)
309 fail("cannot truncate %s", toname);
310 if (dotimes) {
311 utb.actime = sb.st_atime;
312 utb.modtime = sb.st_mtime;
313 if (utime(toname, &utb) < 0)
314 fail("cannot set times of %s", toname);
315 }
316 #ifdef HAVE_FCHMOD
317 if (fchmod(tofd, mode) < 0)
318 #else
319 if (chmod(toname, mode) < 0)
320 #endif
321 fail("cannot change mode of %s", toname);
322 if ((owner || group) && fchown(tofd, uid, gid) < 0)
323 fail("cannot change owner of %s", toname);
324
325 /* Must check for delayed (NFS) write errors on close. */
326 if (close(tofd) < 0)
327 fail("cannot write to %s", toname);
328 close(fromfd);
329 }
330
331 free(toname);
332 }
333
334 free(cwd);
335 free(todir);
336 return 0;
337 }
338
339 /*
340 ** Pathname subroutines.
341 **
342 ** Brendan Eich, 8/29/95
343 */
344
345 char *program;
346
347 void
348 fail(char *format, ...)
349 {
350 int error;
351 va_list ap;
352
353 #ifdef USE_REENTRANT_LIBC
354 R_STRERROR_INIT_R();
355 #endif
356
357 error = errno;
358 fprintf(stderr, "%s: ", program);
359 va_start(ap, format);
360 vfprintf(stderr, format, ap);
361 va_end(ap);
362 if (error)
363
364 #ifdef USE_REENTRANT_LIBC
365 R_STRERROR_R(errno);
366 fprintf(stderr, ": %s", r_strerror_r);
367 #else
368 fprintf(stderr, ": %s", strerror(errno));
369 #endif
370
371 putc('\n', stderr);
372 exit(1);
373 }
374
375 char *
376 getcomponent(char *path, char *name)
377 {
378 if (*path == '\0')
379 return 0;
380 if (*path == '/') {
381 *name++ = '/';
382 } else {
383 do {
384 *name++ = *path++;
385 } while (*path != '/' && *path != '\0');
386 }
387 *name = '\0';
388 while (*path == '/')
389 path++;
390 return path;
391 }
392
393 #ifdef UNIXWARE_READDIR_BUFFER_TOO_SMALL
394 /* Sigh. The static buffer in Unixware's readdir is too small. */
395 struct dirent * readdir(DIR *d)
396 {
397 static struct dirent *buf = NULL;
398 #define MAX_PATH_LEN 1024
399
400
401 if(buf == NULL)
402 buf = (struct dirent *) malloc(sizeof(struct dirent) + MAX_PATH_LEN)
403 ;
404 return(readdir_r(d, buf));
405 }
406 #endif
407
408 char *
409 ino2name(ino_t ino, char *dir)
410 {
411 DIR *dp;
412 struct dirent *ep;
413 char *name;
414
415 dp = opendir("..");
416 if (!dp)
417 fail("cannot read parent directory");
418 for (;;) {
419 if (!(ep = readdir(dp)))
420 fail("cannot find current directory");
421 if (ep->d_ino == ino)
422 break;
423 }
424 name = xstrdup(ep->d_name);
425 closedir(dp);
426 return name;
427 }
428
429 void *
430 xmalloc(size_t size)
431 {
432 void *p = malloc(size);
433 if (!p)
434 fail("cannot allocate %u bytes", size);
435 return p;
436 }
437
438 char *
439 xstrdup(char *s)
440 {
441 return strcpy((char*)xmalloc(strlen(s) + 1), s);
442 }
443
444 char *
445 xbasename(char *path)
446 {
447 char *cp;
448
449 while ((cp = strrchr(path, '/')) && cp[1] == '\0')
450 *cp = '\0';
451 if (!cp) return path;
452 return cp + 1;
453 }
454
455 void
456 xchdir(char *dir)
457 {
458 if (chdir(dir) < 0)
459 fail("cannot change directory to %s", dir);
460 }
461
462 int
463 relatepaths(char *from, char *to, char *outpath)
464 {
465 char *cp, *cp2;
466 int len;
467 char buf[NAME_MAX];
468
469 assert(*from == '/' && *to == '/');
470 for (cp = to, cp2 = from; *cp == *cp2; cp++, cp2++)
471 if (*cp == '\0')
472 break;
473 while (cp[-1] != '/')
474 cp--, cp2--;
475 if (cp - 1 == to) {
476 /* closest common ancestor is /, so use full pathname */
477 len = strlen(strcpy(outpath, to));
478 if (outpath[len] != '/') {
479 outpath[len++] = '/';
480 outpath[len] = '\0';
481 }
482 } else {
483 len = 0;
484 while ((cp2 = getcomponent(cp2, buf)) != 0) {
485 strcpy(outpath + len, "../");
486 len += 3;
487 }
488 while ((cp = getcomponent(cp, buf)) != 0) {
489 sprintf(outpath + len, "%s/", buf);
490 len += strlen(outpath + len);
491 }
492 }
493 return len;
494 }
495
496 void
497 reversepath(char *inpath, char *name, int len, char *outpath)
498 {
499 char *cp, *cp2;
500 char buf[NAME_MAX];
501 struct stat sb;
502
503 cp = strcpy(outpath + PATH_MAX - (len + 1), name);
504 cp2 = inpath;
505 while ((cp2 = getcomponent(cp2, buf)) != 0) {
506 if (strcmp(buf, ".") == 0)
507 continue;
508 if (strcmp(buf, "..") == 0) {
509 if (stat(".", &sb) < 0)
510 fail("cannot stat current directory");
511 name = ino2name(sb.st_ino, "..");
512 len = strlen(name);
513 cp -= len + 1;
514 strcpy(cp, name);
515 cp[len] = '/';
516 free(name);
517 xchdir("..");
518 } else {
519 cp -= 3;
520 strncpy(cp, "../", 3);
521 xchdir(buf);
522 }
523 }
524 strcpy(outpath, cp);
525 }

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