1 /* 2 * util.c --- helper functions used by tune2fs and mke2fs 3 * 4 * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o. 5 * 6 * %Begin-Header% 7 * This file may be redistributed under the terms of the GNU Public 8 * License. 9 * %End-Header% 10 */ 11 12 #ifndef _LARGEFILE_SOURCE 13 #define _LARGEFILE_SOURCE 14 #endif 15 #ifndef _LARGEFILE64_SOURCE 16 #define _LARGEFILE64_SOURCE 17 #endif 18 19 #include "config.h" 20 #include <fcntl.h> 21 #include <setjmp.h> 22 #include <signal.h> 23 #include <stdio.h> 24 #include <string.h> 25 #ifdef HAVE_ERRNO_H 26 #include <errno.h> 27 #endif 28 #if HAVE_UNISTD_H 29 #include <unistd.h> 30 #endif 31 #ifdef HAVE_LINUX_MAJOR_H 32 #include <linux/major.h> 33 #endif 34 #include <sys/types.h> 35 #ifdef HAVE_SYS_STAT_H 36 #include <sys/stat.h> 37 #endif 38 #ifdef HAVE_UNISTD_H 39 #include <unistd.h> 40 #endif 41 #include <time.h> 42 43 #include "et/com_err.h" 44 #include "e2p/e2p.h" 45 #include "ext2fs/ext2_fs.h" 46 #include "ext2fs/ext2fs.h" 47 #include "support/nls-enable.h" 48 #include "blkid/blkid.h" 49 #include "util.h" 50 51 char *journal_location_string = NULL; 52 53 #ifndef HAVE_STRCASECMP 54 int strcasecmp (char *s1, char *s2) 55 { 56 while (*s1 && *s2) { 57 int ch1 = *s1++, ch2 = *s2++; 58 if (isupper (ch1)) 59 ch1 = tolower (ch1); 60 if (isupper (ch2)) 61 ch2 = tolower (ch2); 62 if (ch1 != ch2) 63 return ch1 - ch2; 64 } 65 return *s1 ? 1 : *s2 ? -1 : 0; 66 } 67 #endif 68 69 /* 70 * Given argv[0], return the program name. 71 */ 72 char *get_progname(char *argv_zero) 73 { 74 char *cp; 75 76 cp = strrchr(argv_zero, '/'); 77 if (!cp ) 78 return argv_zero; 79 else 80 return cp+1; 81 } 82 83 static jmp_buf alarm_env; 84 85 static void alarm_signal(int signal EXT2FS_ATTR((unused))) 86 { 87 longjmp(alarm_env, 1); 88 } 89 90 void proceed_question(int delay) 91 { 92 char buf[256]; 93 const char *short_yes = _("yY"); 94 95 fflush(stdout); 96 fflush(stderr); 97 if (delay > 0) { 98 if (setjmp(alarm_env)) { 99 signal(SIGALRM, SIG_IGN); 100 printf("%s", _("<proceeding>\n")); 101 return; 102 } 103 signal(SIGALRM, alarm_signal); 104 printf(_("Proceed anyway (or wait %d seconds) ? (y,n) "), 105 delay); 106 alarm(delay); 107 } else 108 fputs(_("Proceed anyway? (y,n) "), stdout); 109 buf[0] = 0; 110 if (!fgets(buf, sizeof(buf), stdin) || 111 strchr(short_yes, buf[0]) == 0) { 112 putc('\n', stdout); 113 exit(1); 114 } 115 signal(SIGALRM, SIG_IGN); 116 } 117 118 void check_mount(const char *device, int force, const char *type) 119 { 120 errcode_t retval; 121 int mount_flags; 122 123 retval = ext2fs_check_if_mounted(device, &mount_flags); 124 if (retval) { 125 com_err("ext2fs_check_if_mount", retval, 126 _("while determining whether %s is mounted."), 127 device); 128 return; 129 } 130 if (mount_flags & EXT2_MF_MOUNTED) { 131 fprintf(stderr, _("%s is mounted; "), device); 132 if (force >= 2) { 133 fputs(_("mke2fs forced anyway. Hope /etc/mtab is " 134 "incorrect.\n"), stderr); 135 return; 136 } 137 abort_mke2fs: 138 fprintf(stderr, _("will not make a %s here!\n"), type); 139 exit(1); 140 } 141 if (mount_flags & EXT2_MF_BUSY) { 142 fprintf(stderr, _("%s is apparently in use by the system; "), 143 device); 144 if (force >= 2) { 145 fputs(_("mke2fs forced anyway.\n"), stderr); 146 return; 147 } 148 goto abort_mke2fs; 149 } 150 } 151 152 void parse_journal_opts(const char *opts) 153 { 154 char *buf, *token, *next, *p, *arg; 155 int len; 156 int journal_usage = 0; 157 158 len = strlen(opts); 159 buf = malloc(len+1); 160 if (!buf) { 161 fputs(_("Couldn't allocate memory to parse journal " 162 "options!\n"), stderr); 163 exit(1); 164 } 165 strcpy(buf, opts); 166 for (token = buf; token && *token; token = next) { 167 p = strchr(token, ','); 168 next = 0; 169 if (p) { 170 *p = 0; 171 next = p+1; 172 } 173 arg = strchr(token, '='); 174 if (arg) { 175 *arg = 0; 176 arg++; 177 } 178 #if 0 179 printf("Journal option=%s, argument=%s\n", token, 180 arg ? arg : "NONE"); 181 #endif 182 if (strcmp(token, "device") == 0) { 183 journal_device = blkid_get_devname(NULL, arg, NULL); 184 if (!journal_device) { 185 if (arg) 186 fprintf(stderr, _("\nCould not find " 187 "journal device matching %s\n"), 188 arg); 189 journal_usage++; 190 continue; 191 } 192 } else if (strcmp(token, "size") == 0) { 193 if (!arg) { 194 journal_usage++; 195 continue; 196 } 197 journal_size = strtoul(arg, &p, 0); 198 if (*p) 199 journal_usage++; 200 } else if (!strcmp(token, "location")) { 201 if (!arg) { 202 journal_usage++; 203 continue; 204 } 205 journal_location_string = strdup(arg); 206 } else if (strcmp(token, "v1_superblock") == 0) { 207 journal_flags |= EXT2_MKJOURNAL_V1_SUPER; 208 continue; 209 } else 210 journal_usage++; 211 } 212 if (journal_usage) { 213 fputs(_("\nBad journal options specified.\n\n" 214 "Journal options are separated by commas, " 215 "and may take an argument which\n" 216 "\tis set off by an equals ('=') sign.\n\n" 217 "Valid journal options are:\n" 218 "\tsize=<journal size in megabytes>\n" 219 "\tdevice=<journal device>\n" 220 "\tlocation=<journal location>\n\n" 221 "The journal size must be between " 222 "1024 and 10240000 filesystem blocks.\n\n"), stderr); 223 free(buf); 224 exit(1); 225 } 226 free(buf); 227 } 228 229 /* 230 * Determine the number of journal blocks to use, either via 231 * user-specified # of megabytes, or via some intelligently selected 232 * defaults. 233 * 234 * Find a reasonable journal file size (in blocks) given the number of blocks 235 * in the filesystem. For very small filesystems, it is not reasonable to 236 * have a journal that fills more than half of the filesystem. 237 */ 238 unsigned int figure_journal_size(int size, ext2_filsys fs) 239 { 240 int j_blocks; 241 242 j_blocks = ext2fs_default_journal_size(ext2fs_blocks_count(fs->super)); 243 if (j_blocks < 0) { 244 fputs(_("\nFilesystem too small for a journal\n"), stderr); 245 return 0; 246 } 247 248 if (size > 0) { 249 j_blocks = size * 1024 / (fs->blocksize / 1024); 250 if (j_blocks < 1024 || j_blocks > 10240000) { 251 fprintf(stderr, _("\nThe requested journal " 252 "size is %d blocks; it must be\n" 253 "between 1024 and 10240000 blocks. " 254 "Aborting.\n"), 255 j_blocks); 256 exit(1); 257 } 258 if ((unsigned) j_blocks > ext2fs_free_blocks_count(fs->super) / 2) { 259 fputs(_("\nJournal size too big for filesystem.\n"), 260 stderr); 261 exit(1); 262 } 263 } 264 return j_blocks; 265 } 266 267 void print_check_message(int mnt, unsigned int check) 268 { 269 if (mnt < 0) 270 mnt = 0; 271 if (!mnt && !check) 272 return; 273 printf(_("This filesystem will be automatically " 274 "checked every %d mounts or\n" 275 "%g days, whichever comes first. " 276 "Use tune2fs -c or -i to override.\n"), 277 mnt, ((double) check) / (3600 * 24)); 278 } 279 280 void dump_mmp_msg(struct mmp_struct *mmp, const char *msg) 281 { 282 283 if (msg) 284 printf("MMP check failed: %s\n", msg); 285 if (mmp) { 286 time_t t = mmp->mmp_time; 287 288 printf("MMP error info: last update: %s node: %s device: %s\n", 289 ctime(&t), mmp->mmp_nodename, mmp->mmp_bdevname); 290 } 291 } 292
