Send patches - preferably formatted by git format-patch - to patches at archlinux32 dot org.
summaryrefslogtreecommitdiff
path: root/lib/libalpm/util.c
blob: 73bab264841bb8b1f1ffa6b369011f93a58b1cdb (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
408
409
410
411
412
413
414
415
416
417
/*
 *  util.c
 * 
 *  Copyright (c) 2002-2005 by Judd Vinet <jvinet@zeroflux.org>
 * 
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 
 *  USA.
 */

#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <ctype.h>
#include <dirent.h>
#include <time.h>
#include <syslog.h>
#include <zlib.h>
#include <libtar.h>
/* pacman */
#include "log.h"
#include "util.h"
#include "alpm.h"

/* borrowed and modified from Per Liden's pkgutils (http://crux.nu) */
long _alpm_gzopen_frontend(char *pathname, int oflags, int mode)
{
	char* gzoflags;
	int fd;
	gzFile gzf;

	switch (oflags & O_ACCMODE) {
		case O_WRONLY:
			gzoflags = "w";
			break;
		case O_RDONLY:
			gzoflags = "r";
			break;
		case O_RDWR:
		default:
			errno = EINVAL;
			return -1;
	}
	
	if((fd = open(pathname, oflags, mode)) == -1) {
		return -1;
	}
	if((oflags & O_CREAT) && fchmod(fd, mode)) {
		return -1;
	}
	if(!(gzf = gzdopen(fd, gzoflags))) {
		errno = ENOMEM;
		return -1;
	}

	return (long)gzf;
}

/* does the same thing as 'mkdir -p' */
int _alpm_makepath(char *path)
{
	char *orig, *str, *ptr;
	char full[PATH_MAX] = "";
	mode_t oldmask;

	oldmask = umask(0000);

	orig = strdup(path);
	str = orig;
	while((ptr = strsep(&str, "/"))) {
		if(strlen(ptr)) {
			struct stat buf;

			strcat(full, "/");
			strcat(full, ptr);
			if(stat(full, &buf)) {
				if(mkdir(full, 0755)) {
					free(orig);
					umask(oldmask);
					return(1);
				}
			}
		}
	}
	free(orig);
	umask(oldmask);
	return(0);
}

int _alpm_copyfile(char *src, char *dest)
{
	FILE *in, *out;
	size_t len;
	char buf[4097];

	in = fopen(src, "r");
	if(in == NULL) {
		return(1);
	}
	out = fopen(dest, "w");
	if(out == NULL) {
		return(1);
	}

	while((len = fread(buf, 1, 4096, in))) {
		fwrite(buf, 1, len, out);
	}

	fclose(in);
	fclose(out);
	return(0);
}

/* Convert a string to uppercase
 */
char *_alpm_strtoupper(char *str)
{
	char *ptr = str;

	while(*ptr) {
		(*ptr) = toupper(*ptr);
		ptr++;
	}
	return str;
}

/* Trim whitespace and newlines from a string
 */
char *_alpm_strtrim(char *str)
{
	char *pch = str;

	if(*str == '\0') {
		/* string is empty, so we're done. */
		return(str);
	}

	while(isspace(*pch)) {
		pch++;
	}
	if(pch != str) {
		memmove(str, pch, (strlen(pch) + 1));
	}

	/* check if there wasn't anything but whitespace in the string. */
	if(*str == '\0') {
		return(str);
	}

	pch = (char*)(str + (strlen(str) - 1));
	while(isspace(*pch)) {
		pch--;
	}
	*++pch = '\0';

	return(str);
}

/* A cheap grep for text files, returns 1 if a substring
 * was found in the text file fn, 0 if it wasn't
 */
int _alpm_grep(const char *fn, const char *needle)
{
	FILE *fp;

	if((fp = fopen(fn, "r")) == NULL) {
		return(0);
	}
	while(!feof(fp)) {
		char line[1024];
		fgets(line, 1024, fp);
		if(feof(fp)) {
			continue;
		}
		if(strstr(line, needle)) {
			fclose(fp);
			return(1);
		}
	}
	fclose(fp);
	return(0);
}

/* Create a lock file
 */
int _alpm_lckmk(char *file)
{
	int fd, count = 0;

	while((fd = open(file, O_WRONLY | O_CREAT | O_EXCL, 0000)) == -1 && errno == EACCES) { 
		if(++count < 1) {
			sleep(1);
		}	else {
			return(-1);
		}
	}
	return(fd > 0 ? 0 : -1);

	return(0);
}

/* Remove a lock file
 */
int _alpm_lckrm(char *file)
{
	return(unlink(file) == -1);
}

int _alpm_unpack(char *archive, const char *prefix, const char *fn)
{
	TAR *tar = NULL;
	char expath[PATH_MAX];
	tartype_t gztype = {
		(openfunc_t) _alpm_gzopen_frontend,
		(closefunc_t)gzclose,
		(readfunc_t) gzread,
		(writefunc_t)gzwrite
	};

	/* open the .tar.gz package */
	if(tar_open(&tar, archive, &gztype, O_RDONLY, 0, TAR_GNU) == -1) {
		perror(archive);
		return(1);
	}
	while(!th_read(tar)) {
		if(fn && strcmp(fn, th_get_pathname(tar))) {
			if(TH_ISREG(tar) && tar_skip_regfile(tar)) {
				_alpm_log(PM_LOG_ERROR, "bad tar archive: %s", archive);
				tar_close(tar);
				return(1);
			}
			continue;
		}
		snprintf(expath, PATH_MAX, "%s/%s", prefix, th_get_pathname(tar));
		if(tar_extract_file(tar, expath)) {
			_alpm_log(PM_LOG_ERROR, "could not extract %s (%s)", th_get_pathname(tar), strerror(errno));
		}
		if(fn) break;
	}
	tar_close(tar);

	return(0);
}

/* does the same thing as 'rm -rf' */
int _alpm_rmrf(char *path)
{
	int errflag = 0;
	struct dirent *dp;
	DIR *dirp;
	char name[PATH_MAX];
	extern int errno;

	if(!unlink(path)) {
		return(0);
	} else {
		if(errno == ENOENT) {
			return(0);
		} else if(errno == EPERM) {
			/* fallthrough */
		} else if(errno == EISDIR) {
			/* fallthrough */
		} else if(errno == ENOTDIR) {
			return(1);
		} else {
			/* not a directory */
			return(1);
		}

		if((dirp = opendir(path)) == (DIR *)-1) {
			return(1);
		}
		for(dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) {
			if(dp->d_ino) {
				sprintf(name, "%s/%s", path, dp->d_name);
				if(strcmp(dp->d_name, "..") && strcmp(dp->d_name, ".")) {
					errflag += _alpm_rmrf(name);
				}
			}
		}
		closedir(dirp);
		if(rmdir(path)) {
			errflag++;
		}
		return(errflag);
	}
	return(0);
}

int _alpm_log_action(unsigned char usesyslog, FILE *f, char *fmt, ...)
{
	char msg[1024];
	va_list args;

	va_start(args, fmt);
	vsnprintf(msg, 1024, fmt, args);
	va_end(args);

	if(usesyslog) {
		syslog(LOG_WARNING, "%s", msg);
	}

	if(f) {
		time_t t;
		struct tm *tm;

		t = time(NULL);
		tm = localtime(&t);

		fprintf(f, "[%02d/%02d/%02d %02d:%02d] %s\n", tm->tm_mon+1, tm->tm_mday,
		        tm->tm_year-100, tm->tm_hour, tm->tm_min, msg);
	}

	return(0);
}

int _alpm_ldconfig(char *root)
{
	char line[PATH_MAX];
	struct stat buf;

	snprintf(line, PATH_MAX, "%setc/ld.so.conf", root);
	if(!stat(line, &buf)) {
		snprintf(line, PATH_MAX, "%ssbin/ldconfig", root);
		if(!stat(line, &buf)) {
			char cmd[PATH_MAX];
			snprintf(cmd, PATH_MAX, "%s -r %s", line, root);
			system(cmd);
		}
	}

	return(0);
}

int _alpm_runscriptlet(char *root, char *installfn, char *script, char *ver, char *oldver)
{
	char scriptfn[PATH_MAX];
	char cmdline[PATH_MAX];
	char tmpdir[PATH_MAX] = "";
	char *scriptpath;
	struct stat buf;
	char cwd[PATH_MAX];

	if(stat(installfn, &buf)) {
		/* not found */
		return(0);
	}

	if(!strcmp(script, "pre_upgrade") || !strcmp(script, "pre_install")) {
		snprintf(tmpdir, PATH_MAX, "%stmp/", root);
		if(stat(tmpdir, &buf)) {
			_alpm_makepath(tmpdir);
		}
		snprintf(tmpdir, PATH_MAX, "%stmp/alpm_XXXXXX", root);
		if(mkdtemp(tmpdir) == NULL) {
			_alpm_log(PM_LOG_ERROR, "could not create temp directory");
			return(1);
		}
		_alpm_unpack(installfn, tmpdir, ".INSTALL");
		snprintf(scriptfn, PATH_MAX, "%s/.INSTALL", tmpdir);
		/* chop off the root so we can find the tmpdir in the chroot */
		scriptpath = scriptfn + strlen(root) - 1;
		return(0);
	} else {
		STRNCPY(scriptfn, installfn, PATH_MAX);
		/* chop off the root so we can find the tmpdir in the chroot */
		scriptpath = scriptfn + strlen(root) - 1;
	}

	if(!_alpm_grep(scriptfn, script)) {
		/* script not found in scriptlet file */
		if(strlen(tmpdir) && _alpm_rmrf(tmpdir)) {
			_alpm_log(PM_LOG_WARNING, "could not remove tmpdir %s", tmpdir);
		}
		return(0);
	}

	/* save the cwd so we can restore it later */
	getcwd(cwd, PATH_MAX);
	/* just in case our cwd was removed in the upgrade operation */
	chdir("/");

	_alpm_log(PM_LOG_FLOW2, "executing %s script...", script);
	if(oldver) {
		snprintf(cmdline, PATH_MAX, "echo \"umask 0022; source %s %s %s %s\" | chroot %s /bin/sh",
				scriptpath, script, ver, oldver, root);
	} else {
		snprintf(cmdline, PATH_MAX, "echo \"umask 0022; source %s %s %s\" | chroot %s /bin/sh",
				scriptpath, script, ver, root);
	}
	_alpm_log(PM_LOG_FLOW2, "%s", cmdline);
	system(cmdline);
	
	if(strlen(tmpdir) && _alpm_rmrf(tmpdir)) {
		_alpm_log(PM_LOG_WARNING, "could not remove tmpdir %s", tmpdir);
	}

	chdir(cwd);
	return(0);
}

/* vim: set ts=2 sw=2 noet: */