summaryrefslogtreecommitdiffstats
path: root/misc/util.c
blob: 3e83169f118995898ab680b6a53aca31bfb0186f (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
/*
 * util.c --- helper functions used by tune2fs and mke2fs
 *
 * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o.
 *
 * %Begin-Header%
 * This file may be redistributed under the terms of the GNU Public
 * License.
 * %End-Header%
 */

#ifndef _LARGEFILE_SOURCE
#define _LARGEFILE_SOURCE
#endif
#ifndef _LARGEFILE64_SOURCE
#define _LARGEFILE64_SOURCE
#endif

#ifdef _WIN32
#define _POSIX
#define __USE_MINGW_ALARM
#endif

#include "config.h"
#include <fcntl.h>
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_LINUX_MAJOR_H
#include <linux/major.h>
#endif
#include <sys/types.h>
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <time.h>

#include "et/com_err.h"
#include "e2p/e2p.h"
#include "ext2fs/ext2_fs.h"
#include "ext2fs/ext2fs.h"
#include "support/nls-enable.h"
#include "support/devname.h"
#include "blkid/blkid.h"
#include "util.h"

char *journal_location_string = NULL;

#ifndef HAVE_STRCASECMP
int strcasecmp (char *s1, char *s2)
{
	while (*s1 && *s2) {
		int ch1 = *s1++, ch2 = *s2++;
		if (isupper (ch1))
			ch1 = tolower (ch1);
		if (isupper (ch2))
			ch2 = tolower (ch2);
		if (ch1 != ch2)
			return ch1 - ch2;
	}
	return *s1 ? 1 : *s2 ? -1 : 0;
}
#endif

/*
 * Given argv[0], return the program name.
 */
char *get_progname(char *argv_zero)
{
	char	*cp;

	cp = strrchr(argv_zero, '/');
	if (!cp )
		return argv_zero;
	else
		return cp+1;
}

static jmp_buf alarm_env;

static void alarm_signal(int signal EXT2FS_ATTR((unused)))
{
	longjmp(alarm_env, 1);
}

void proceed_question(int delay)
{
	char buf[256];
	const char *short_yes = _("yY");
	const char *english_yes = "yY";

	fflush(stdout);
	fflush(stderr);
	if (delay > 0) {
		if (setjmp(alarm_env)) {
			signal(SIGALRM, SIG_IGN);
			printf("%s", _("<proceeding>\n"));
			return;
		}
		signal(SIGALRM, alarm_signal);
		printf(_("Proceed anyway (or wait %d seconds to proceed) ? (y,N) "),
		       delay);
		alarm(delay);
	} else
		fputs(_("Proceed anyway? (y,N) "), stdout);
	buf[0] = 0;
	if (!fgets(buf, sizeof(buf), stdin) ||
	    strchr(_("nN"), buf[0]) ||
	    !(strchr(short_yes, buf[0]) ||
	      strchr(english_yes, buf[0]))) {
		putc('\n', stdout);
		exit(1);
	}
	signal(SIGALRM, SIG_IGN);
}

void check_mount(const char *device, int force, const char *type)
{
	errcode_t	retval;
	int		mount_flags;

	retval = ext2fs_check_if_mounted(device, &mount_flags);
	if (retval) {
		com_err("ext2fs_check_if_mount", retval,
			_("while determining whether %s is mounted."),
			device);
		return;
	}
	if (mount_flags & EXT2_MF_MOUNTED) {
		fprintf(stderr, _("%s is mounted; "), device);
		if (force >= 2) {
			fputs(_("mke2fs forced anyway.  Hope /etc/mtab is "
				"incorrect.\n"), stderr);
			return;
		}
	abort_mke2fs:
		fprintf(stderr, _("will not make a %s here!\n"), type);
		exit(1);
	}
	if (mount_flags & EXT2_MF_BUSY) {
		fprintf(stderr, _("%s is apparently in use by the system; "),
			device);
		if (force >= 2) {
			fputs(_("mke2fs forced anyway.\n"), stderr);
			return;
		}
		goto abort_mke2fs;
	}
}

void parse_journal_opts(const char *opts)
{
	char	*buf, *token, *next, *p, *arg;
	int	len;
	int	journal_usage = 0;

	len = strlen(opts);
	buf = malloc(len+1);
	if (!buf) {
		fputs(_("Couldn't allocate memory to parse journal "
			"options!\n"), stderr);
		exit(1);
	}
	strcpy(buf, opts);
	for (token = buf; token && *token; token = next) {
		p = strchr(token, ',');
		next = 0;
		if (p) {
			*p = 0;
			next = p+1;
		}
		arg = strchr(token, '=');
		if (arg) {
			*arg = 0;
			arg++;
		}
#if 0
		printf("Journal option=%s, argument=%s\n", token,
		       arg ? arg : "NONE");
#endif
		if (strcmp(token, "device") == 0) {
			journal_device = get_devname(NULL, arg, NULL);
			if (!journal_device) {
				if (arg)
					fprintf(stderr, _("\nCould not find "
						"journal device matching %s\n"),
						arg);
				journal_usage++;
				continue;
			}
		} else if (strcmp(token, "size") == 0) {
			if (!arg) {
				journal_usage++;
				continue;
			}
			journal_size = strtoul(arg, &p, 0);
			if (*p)
				journal_usage++;
		} else if (strcmp(token, "fast_commit_size") == 0) {
			if (!arg) {
				journal_usage++;
				continue;
			}
			journal_fc_size = strtoul(arg, &p, 0);
			if (*p)
				journal_usage++;
		} else if (!strcmp(token, "location")) {
			if (!arg) {
				journal_usage++;
				continue;
			}
			journal_location_string = strdup(arg);
		} else if (strcmp(token, "v1_superblock") == 0) {
			journal_flags |= EXT2_MKJOURNAL_V1_SUPER;
			continue;
		} else
			journal_usage++;
	}
	if (journal_usage) {
		fputs(_("\nBad journal options specified.\n\n"
			"Journal options are separated by commas, "
			"and may take an argument which\n"
			"\tis set off by an equals ('=') sign.\n\n"
			"Valid journal options are:\n"
			"\tsize=<journal size in megabytes>\n"
			"\tdevice=<journal device>\n"
			"\tlocation=<journal location>\n\n"
			"The journal size must be between "
			"1024 and 10240000 filesystem blocks.\n\n"), stderr);
		free(buf);
		exit(1);
	}
	free(buf);
}

static inline int jsize_to_blks(ext2_filsys fs, int size)
{
	return (size * 1024) / (fs->blocksize / 1024);
}

/* Fast commit size is in KBs */
static inline int fcsize_to_blks(ext2_filsys fs, int size)
{
	return (size * 1024) / (fs->blocksize);
}

/*
 * Determine the number of journal blocks to use, either via
 * user-specified # of megabytes, or via some intelligently selected
 * defaults.
 *
 * Find a reasonable journal file size (in blocks) given the number of blocks in
 * the filesystem. For very small filesystems, it is not reasonable to have a
 * journal that fills more than half of the filesystem.
 */
void figure_journal_size(struct ext2fs_journal_params *jparams,
		int requested_j_size, int requested_fc_size, ext2_filsys fs)
{
	int total_blocks, ret;

	ret = ext2fs_get_journal_params(jparams, fs);
	if (ret) {
		fputs(_("\nFilesystem too small for a journal\n"), stderr);
		return;
	}

	if (requested_j_size > 0 ||
		(ext2fs_has_feature_fast_commit(fs->super) && requested_fc_size > 0)) {
		if (requested_j_size > 0)
			jparams->num_journal_blocks =
				jsize_to_blks(fs, requested_j_size);
		if (ext2fs_has_feature_fast_commit(fs->super) &&
			requested_fc_size > 0)
			jparams->num_fc_blocks =
				fcsize_to_blks(fs, requested_fc_size);
		else if (!ext2fs_has_feature_fast_commit(fs->super))
			jparams->num_fc_blocks = 0;
		total_blocks = jparams->num_journal_blocks + jparams->num_fc_blocks;
		if (total_blocks < 1024 || total_blocks > 10240000) {
			fprintf(stderr, _("\nThe total requested journal "
				"size is %d blocks; it must be\n"
				"between 1024 and 10240000 blocks.  "
				"Aborting.\n"),
				total_blocks);
			exit(1);
		}
		if ((unsigned int) total_blocks > ext2fs_free_blocks_count(fs->super) / 2) {
			fputs(_("\nTotal journal size too big for filesystem.\n"),
			      stderr);
			exit(1);
		}
	}
}

void print_check_message(int mnt, unsigned int check)
{
	if (mnt < 0)
		mnt = 0;
	if (!mnt && !check)
		return;
	printf(_("This filesystem will be automatically "
		 "checked every %d mounts or\n"
		 "%g days, whichever comes first.  "
		 "Use tune2fs -c or -i to override.\n"),
	       mnt, ((double) check) / (3600 * 24));
}

void dump_mmp_msg(struct mmp_struct *mmp, const char *msg)
{

	if (msg)
		printf("MMP check failed: %s\n", msg);
	if (mmp) {
		time_t t = mmp->mmp_time;

		printf("MMP error info: node: %.*s, device: %.*s, updated: %s",
		       EXT2_LEN_STR(mmp->mmp_nodename),
		       EXT2_LEN_STR(mmp->mmp_bdevname), ctime(&t));
	}
}