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 #define _LARGEFILE_SOURCE 13 #define _LARGEFILE64_SOURCE 14 15 #include <stdio.h> 16 #include <string.h> 17 #ifdef HAVE_ERRNO_H 18 #include <errno.h> 19 #endif 20 #ifdef HAVE_LINUX_MAJOR_H 21 #include <linux/major.h> 22 #endif 23 #ifdef HAVE_SYS_STAT_H 24 #include <sys/stat.h> 25 #endif 26 #include <time.h> 27 28 #include "et/com_err.h" 29 #include "e2p/e2p.h" 30 #include "ext2fs/ext2_fs.h" 31 #include "ext2fs/ext2fs.h" 32 #include "nls-enable.h" 33 #include "blkid/blkid.h" 34 #include "util.h" 35 36 #ifndef HAVE_STRCASECMP strcasecmp(char * s1,char * s2)37 int strcasecmp (char *s1, char *s2) 38 { 39 while (*s1 && *s2) { 40 int ch1 = *s1++, ch2 = *s2++; 41 if (isupper (ch1)) 42 ch1 = tolower (ch1); 43 if (isupper (ch2)) 44 ch2 = tolower (ch2); 45 if (ch1 != ch2) 46 return ch1 - ch2; 47 } 48 return *s1 ? 1 : *s2 ? -1 : 0; 49 } 50 #endif 51 52 /* 53 * Given argv[0], return the program name. 54 */ get_progname(char * argv_zero)55 char *get_progname(char *argv_zero) 56 { 57 char *cp; 58 59 cp = strrchr(argv_zero, '/'); 60 if (!cp ) 61 return argv_zero; 62 else 63 return cp+1; 64 } 65 proceed_question(void)66 void proceed_question(void) 67 { 68 char buf[256]; 69 const char *short_yes = _("yY"); 70 71 fflush(stdout); 72 fflush(stderr); 73 fputs(_("Proceed anyway? (y,n) "), stdout); 74 buf[0] = 0; 75 if (!fgets(buf, sizeof(buf), stdin) || 76 strchr(short_yes, buf[0]) == 0) 77 exit(1); 78 } 79 check_plausibility(const char * device)80 void check_plausibility(const char *device) 81 { 82 int val; 83 ext2fs_struct_stat s; 84 85 val = ext2fs_stat(device, &s); 86 87 if(val == -1) { 88 fprintf(stderr, _("Could not stat %s --- %s\n"), 89 device, error_message(errno)); 90 if (errno == ENOENT) 91 fputs(_("\nThe device apparently does not exist; " 92 "did you specify it correctly?\n"), stderr); 93 exit(1); 94 } 95 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) 96 /* On FreeBSD, all disk devices are character specials */ 97 if (!S_ISBLK(s.st_mode) && !S_ISCHR(s.st_mode)) 98 #else 99 if (!S_ISBLK(s.st_mode)) 100 #endif 101 { 102 printf(_("%s is not a block special device.\n"), device); 103 proceed_question(); 104 return; 105 } 106 107 #ifdef HAVE_LINUX_MAJOR_H 108 #ifndef MAJOR 109 #define MAJOR(dev) ((dev)>>8) 110 #define MINOR(dev) ((dev) & 0xff) 111 #endif 112 #ifndef SCSI_BLK_MAJOR 113 #ifdef SCSI_DISK0_MAJOR 114 #ifdef SCSI_DISK8_MAJOR 115 #define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \ 116 ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR) || \ 117 ((M) >= SCSI_DISK8_MAJOR && (M) <= SCSI_DISK15_MAJOR)) 118 #else 119 #define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \ 120 ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR)) 121 #endif /* defined(SCSI_DISK8_MAJOR) */ 122 #define SCSI_BLK_MAJOR(M) (SCSI_DISK_MAJOR((M)) || (M) == SCSI_CDROM_MAJOR) 123 #else 124 #define SCSI_BLK_MAJOR(M) ((M) == SCSI_DISK_MAJOR || (M) == SCSI_CDROM_MAJOR) 125 #endif /* defined(SCSI_DISK0_MAJOR) */ 126 #endif /* defined(SCSI_BLK_MAJOR) */ 127 if (((MAJOR(s.st_rdev) == HD_MAJOR && 128 MINOR(s.st_rdev)%64 == 0) || 129 (SCSI_BLK_MAJOR(MAJOR(s.st_rdev)) && 130 MINOR(s.st_rdev)%16 == 0))) { 131 printf(_("%s is entire device, not just one partition!\n"), 132 device); 133 proceed_question(); 134 } 135 #endif 136 } 137 check_mount(const char * device,int force,const char * type)138 void check_mount(const char *device, int force, const char *type) 139 { 140 errcode_t retval; 141 int mount_flags; 142 143 retval = ext2fs_check_if_mounted(device, &mount_flags); 144 if (retval) { 145 com_err("ext2fs_check_if_mount", retval, 146 _("while determining whether %s is mounted."), 147 device); 148 return; 149 } 150 if (mount_flags & EXT2_MF_MOUNTED) { 151 fprintf(stderr, _("%s is mounted; "), device); 152 if (force >= 2) { 153 fputs(_("mke2fs forced anyway. Hope /etc/mtab is " 154 "incorrect.\n"), stderr); 155 return; 156 } 157 abort_mke2fs: 158 fprintf(stderr, _("will not make a %s here!\n"), type); 159 exit(1); 160 } 161 if (mount_flags & EXT2_MF_BUSY) { 162 fprintf(stderr, _("%s is apparently in use by the system; "), 163 device); 164 if (force >= 2) { 165 fputs(_("mke2fs forced anyway.\n"), stderr); 166 return; 167 } 168 goto abort_mke2fs; 169 } 170 } 171 parse_journal_opts(const char * opts)172 void parse_journal_opts(const char *opts) 173 { 174 char *buf, *token, *next, *p, *arg; 175 int len; 176 int journal_usage = 0; 177 178 len = strlen(opts); 179 buf = malloc(len+1); 180 if (!buf) { 181 fputs(_("Couldn't allocate memory to parse journal " 182 "options!\n"), stderr); 183 exit(1); 184 } 185 strcpy(buf, opts); 186 for (token = buf; token && *token; token = next) { 187 p = strchr(token, ','); 188 next = 0; 189 if (p) { 190 *p = 0; 191 next = p+1; 192 } 193 arg = strchr(token, '='); 194 if (arg) { 195 *arg = 0; 196 arg++; 197 } 198 #if 0 199 printf("Journal option=%s, argument=%s\n", token, 200 arg ? arg : "NONE"); 201 #endif 202 if (strcmp(token, "device") == 0) { 203 journal_device = blkid_get_devname(NULL, arg, NULL); 204 if (!journal_device) { 205 if (arg) 206 fprintf(stderr, _("\nCould not find " 207 "journal device matching %s\n"), 208 arg); 209 journal_usage++; 210 continue; 211 } 212 } else if (strcmp(token, "size") == 0) { 213 if (!arg) { 214 journal_usage++; 215 continue; 216 } 217 journal_size = strtoul(arg, &p, 0); 218 if (*p) 219 journal_usage++; 220 } else if (strcmp(token, "v1_superblock") == 0) { 221 journal_flags |= EXT2_MKJOURNAL_V1_SUPER; 222 continue; 223 } else 224 journal_usage++; 225 } 226 if (journal_usage) { 227 fputs(_("\nBad journal options specified.\n\n" 228 "Journal options are separated by commas, " 229 "and may take an argument which\n" 230 "\tis set off by an equals ('=') sign.\n\n" 231 "Valid journal options are:\n" 232 "\tsize=<journal size in megabytes>\n" 233 "\tdevice=<journal device>\n\n" 234 "The journal size must be between " 235 "1024 and 10240000 filesystem blocks.\n\n"), stderr); 236 free(buf); 237 exit(1); 238 } 239 free(buf); 240 } 241 242 /* 243 * Determine the number of journal blocks to use, either via 244 * user-specified # of megabytes, or via some intelligently selected 245 * defaults. 246 * 247 * Find a reasonable journal file size (in blocks) given the number of blocks 248 * in the filesystem. For very small filesystems, it is not reasonable to 249 * have a journal that fills more than half of the filesystem. 250 */ figure_journal_size(int size,ext2_filsys fs)251 unsigned int figure_journal_size(int size, ext2_filsys fs) 252 { 253 int j_blocks; 254 255 j_blocks = ext2fs_default_journal_size(ext2fs_blocks_count(fs->super)); 256 if (j_blocks < 0) { 257 fputs(_("\nFilesystem too small for a journal\n"), stderr); 258 return 0; 259 } 260 261 if (size > 0) { 262 j_blocks = size * 1024 / (fs->blocksize / 1024); 263 if (j_blocks < 1024 || j_blocks > 10240000) { 264 fprintf(stderr, _("\nThe requested journal " 265 "size is %d blocks; it must be\n" 266 "between 1024 and 10240000 blocks. " 267 "Aborting.\n"), 268 j_blocks); 269 exit(1); 270 } 271 if ((unsigned) j_blocks > ext2fs_free_blocks_count(fs->super) / 2) { 272 fputs(_("\nJournal size too big for filesystem.\n"), 273 stderr); 274 exit(1); 275 } 276 } 277 return j_blocks; 278 } 279 print_check_message(int mnt,unsigned int check)280 void print_check_message(int mnt, unsigned int check) 281 { 282 if (mnt < 0) 283 mnt = 0; 284 if (!mnt && !check) 285 return; 286 printf(_("This filesystem will be automatically " 287 "checked every %d mounts or\n" 288 "%g days, whichever comes first. " 289 "Use tune2fs -c or -i to override.\n"), 290 mnt, ((double) check) / (3600 * 24)); 291 } 292 dump_mmp_msg(struct mmp_struct * mmp,const char * msg)293 void dump_mmp_msg(struct mmp_struct *mmp, const char *msg) 294 { 295 296 if (msg) 297 printf("MMP check failed: %s\n", msg); 298 if (mmp) { 299 time_t t = mmp->mmp_time; 300 301 printf("MMP error info: last update: %s node: %s device: %s\n", 302 ctime(&t), mmp->mmp_nodename, mmp->mmp_bdevname); 303 } 304 } 305