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 27 #include "et/com_err.h" 28 #include "e2p/e2p.h" 29 #include "ext2fs/ext2_fs.h" 30 #include "ext2fs/ext2fs.h" 31 #include "nls-enable.h" 32 #include "blkid/blkid.h" 33 #include "util.h" 34 35 #ifndef HAVE_STRCASECMP 36 int strcasecmp (char *s1, char *s2) 37 { 38 while (*s1 && *s2) { 39 int ch1 = *s1++, ch2 = *s2++; 40 if (isupper (ch1)) 41 ch1 = tolower (ch1); 42 if (isupper (ch2)) 43 ch2 = tolower (ch2); 44 if (ch1 != ch2) 45 return ch1 - ch2; 46 } 47 return *s1 ? 1 : *s2 ? -1 : 0; 48 } 49 #endif 50 51 /* 52 * Given argv[0], return the program name. 53 */ 54 char *get_progname(char *argv_zero) 55 { 56 char *cp; 57 58 cp = strrchr(argv_zero, '/'); 59 if (!cp ) 60 return argv_zero; 61 else 62 return cp+1; 63 } 64 65 void proceed_question(void) 66 { 67 char buf[256]; 68 const char *short_yes = _("yY"); 69 70 fflush(stdout); 71 fflush(stderr); 72 fputs(_("Proceed anyway? (y,n) "), stdout); 73 buf[0] = 0; 74 if (!fgets(buf, sizeof(buf), stdin) || 75 strchr(short_yes, buf[0]) == 0) 76 exit(1); 77 } 78 79 void check_plausibility(const char *device) 80 { 81 int val; 82 #ifdef HAVE_OPEN64 83 struct stat64 s; 84 85 val = stat64(device, &s); 86 #else 87 struct stat s; 88 89 val = stat(device, &s); 90 #endif 91 92 if(val == -1) { 93 fprintf(stderr, _("Could not stat %s --- %s\n"), 94 device, error_message(errno)); 95 if (errno == ENOENT) 96 fputs(_("\nThe device apparently does not exist; " 97 "did you specify it correctly?\n"), stderr); 98 exit(1); 99 } 100 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) 101 /* On FreeBSD, all disk devices are character specials */ 102 if (!S_ISBLK(s.st_mode) && !S_ISCHR(s.st_mode)) 103 #else 104 if (!S_ISBLK(s.st_mode)) 105 #endif 106 { 107 printf(_("%s is not a block special device.\n"), device); 108 proceed_question(); 109 return; 110 } 111 112 #ifdef HAVE_LINUX_MAJOR_H 113 #ifndef MAJOR 114 #define MAJOR(dev) ((dev)>>8) 115 #define MINOR(dev) ((dev) & 0xff) 116 #endif 117 #ifndef SCSI_BLK_MAJOR 118 #ifdef SCSI_DISK0_MAJOR 119 #ifdef SCSI_DISK8_MAJOR 120 #define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \ 121 ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR) || \ 122 ((M) >= SCSI_DISK8_MAJOR && (M) <= SCSI_DISK15_MAJOR)) 123 #else 124 #define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \ 125 ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR)) 126 #endif /* defined(SCSI_DISK8_MAJOR) */ 127 #define SCSI_BLK_MAJOR(M) (SCSI_DISK_MAJOR((M)) || (M) == SCSI_CDROM_MAJOR) 128 #else 129 #define SCSI_BLK_MAJOR(M) ((M) == SCSI_DISK_MAJOR || (M) == SCSI_CDROM_MAJOR) 130 #endif /* defined(SCSI_DISK0_MAJOR) */ 131 #endif /* defined(SCSI_BLK_MAJOR) */ 132 if (((MAJOR(s.st_rdev) == HD_MAJOR && 133 MINOR(s.st_rdev)%64 == 0) || 134 (SCSI_BLK_MAJOR(MAJOR(s.st_rdev)) && 135 MINOR(s.st_rdev)%16 == 0))) { 136 printf(_("%s is entire device, not just one partition!\n"), 137 device); 138 proceed_question(); 139 } 140 #endif 141 } 142 143 void check_mount(const char *device, int force, const char *type) 144 { 145 errcode_t retval; 146 int mount_flags; 147 148 retval = ext2fs_check_if_mounted(device, &mount_flags); 149 if (retval) { 150 com_err("ext2fs_check_if_mount", retval, 151 _("while determining whether %s is mounted."), 152 device); 153 return; 154 } 155 if (mount_flags & EXT2_MF_MOUNTED) { 156 fprintf(stderr, _("%s is mounted; "), device); 157 if (force > 2) { 158 fputs(_("mke2fs forced anyway. Hope /etc/mtab is " 159 "incorrect.\n"), stderr); 160 return; 161 } 162 abort_mke2fs: 163 fprintf(stderr, _("will not make a %s here!\n"), type); 164 exit(1); 165 } 166 if (mount_flags & EXT2_MF_BUSY) { 167 fprintf(stderr, _("%s is apparently in use by the system; "), 168 device); 169 if (force > 2) { 170 fputs(_("mke2fs forced anyway.\n"), stderr); 171 return; 172 } 173 goto abort_mke2fs; 174 } 175 } 176 177 void parse_journal_opts(const char *opts) 178 { 179 char *buf, *token, *next, *p, *arg; 180 int len; 181 int journal_usage = 0; 182 183 len = strlen(opts); 184 buf = malloc(len+1); 185 if (!buf) { 186 fputs(_("Couldn't allocate memory to parse journal " 187 "options!\n"), stderr); 188 exit(1); 189 } 190 strcpy(buf, opts); 191 for (token = buf; token && *token; token = next) { 192 p = strchr(token, ','); 193 next = 0; 194 if (p) { 195 *p = 0; 196 next = p+1; 197 } 198 arg = strchr(token, '='); 199 if (arg) { 200 *arg = 0; 201 arg++; 202 } 203 #if 0 204 printf("Journal option=%s, argument=%s\n", token, 205 arg ? arg : "NONE"); 206 #endif 207 if (strcmp(token, "device") == 0) { 208 journal_device = blkid_get_devname(NULL, arg, NULL); 209 if (!journal_device) { 210 journal_usage++; 211 continue; 212 } 213 } else if (strcmp(token, "size") == 0) { 214 if (!arg) { 215 journal_usage++; 216 continue; 217 } 218 journal_size = strtoul(arg, &p, 0); 219 if (*p) 220 journal_usage++; 221 } else if (strcmp(token, "v1_superblock") == 0) { 222 journal_flags |= EXT2_MKJOURNAL_V1_SUPER; 223 continue; 224 } else 225 journal_usage++; 226 } 227 if (journal_usage) { 228 fputs(_("\nBad journal options specified.\n\n" 229 "Journal options are separated by commas, " 230 "and may take an argument which\n" 231 "\tis set off by an equals ('=') sign.\n\n" 232 "Valid journal options are:\n" 233 "\tsize=<journal size in megabytes>\n" 234 "\tdevice=<journal device>\n\n" 235 "The journal size must be between " 236 "1024 and 10240000 filesystem blocks.\n\n"), stderr); 237 free(buf); 238 exit(1); 239 } 240 free(buf); 241 } 242 243 /* 244 * Determine the number of journal blocks to use, either via 245 * user-specified # of megabytes, or via some intelligently selected 246 * defaults. 247 * 248 * Find a reasonable journal file size (in blocks) given the number of blocks 249 * in the filesystem. For very small filesystems, it is not reasonable to 250 * have a journal that fills more than half of the filesystem. 251 */ 252 unsigned int figure_journal_size(int size, ext2_filsys fs) 253 { 254 int j_blocks; 255 256 j_blocks = ext2fs_default_journal_size(fs->super->s_blocks_count); 257 if (j_blocks < 0) { 258 fputs(_("\nFilesystem too small for a journal\n"), stderr); 259 return 0; 260 } 261 262 if (size > 0) { 263 j_blocks = size * 1024 / (fs->blocksize / 1024); 264 if (j_blocks < 1024 || j_blocks > 10240000) { 265 fprintf(stderr, _("\nThe requested journal " 266 "size is %d blocks; it must be\n" 267 "between 1024 and 10240000 blocks. " 268 "Aborting.\n"), 269 j_blocks); 270 exit(1); 271 } 272 if ((unsigned) j_blocks > fs->super->s_free_blocks_count / 2) { 273 fputs(_("\nJournal size too big for filesystem.\n"), 274 stderr); 275 exit(1); 276 } 277 } 278 return j_blocks; 279 } 280 281 void print_check_message(ext2_filsys fs) 282 { 283 printf(_("This filesystem will be automatically " 284 "checked every %d mounts or\n" 285 "%g days, whichever comes first. " 286 "Use tune2fs -c or -i to override.\n"), 287 fs->super->s_max_mnt_count, 288 (double)fs->super->s_checkinterval / (3600 * 24)); 289 } 290
