summaryrefslogtreecommitdiffstats
path: root/security/nss/coreconf/nsinstall/nsinstall.c
blob: 3df0ae6b026c90a257ec56f607bf86f1c948c0c0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
/* 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.
*/
#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) || defined(NTO) || defined(DARWIN) || defined(BEOS) || defined(__riscos__)
#undef HAVE_LCHOWN
#endif

#define HAVE_FCHMOD

#if defined(BEOS)
#undef HAVE_FCHMOD
#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


#ifdef GETCWD_CANT_MALLOC
/*
 * this should probably go into a utility library in case other applications
 * need it.
 */
static char *
getcwd_do_malloc(char *path, int len) {

    if (!path) {
	path = malloc(PATH_MAX +1);
	if (!path) return NULL;
    }
    return getcwd(path, PATH_MAX);
}
#define GETCWD	getcwd_do_malloc
#else
#define GETCWD	getcwd
#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);
}

/* 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++;
    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 = '/';
    }
    rv = mkdir(path, mode);
    if (rv) {
	if (errno != EEXIST)
	    fail("mkdirs cannot make %s", path);
	fprintf(stderr, "directory creation race: %s\n", 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: %s\n", 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: %s\n", toname);
                    fail("symlink was attempted in working directory %s "
                         "from %s to %s.\n", cwd, name, 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);
	    }
#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("close reports write error on %s", toname);
	    close(fromfd);
	}

	free(toname);
    }

    free(cwd);
    free(todir);
    return 0;
}