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build: update version for Lustre build
[tools/e2fsprogs.git] / misc / util.c
index 4bffb43..2898830 100644 (file)
@@ -1,6 +1,6 @@
 /*
  * util.c --- helper functions used by tune2fs and mke2fs
- * 
+ *
  * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o.
  *
  * %Begin-Header%
 #define _LARGEFILE_SOURCE
 #define _LARGEFILE64_SOURCE
 
+#include "config.h"
+#include <fcntl.h>
+#include <setjmp.h>
+#include <signal.h>
 #include <stdio.h>
 #include <string.h>
 #ifdef HAVE_ERRNO_H
 #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 "nls-enable.h"
-#include "get_device_by_label.h"
+#include "blkid/blkid.h"
 #include "util.h"
 
+char *journal_location_string = NULL;
+
 #ifndef HAVE_STRCASECMP
 int strcasecmp (char *s1, char *s2)
 {
@@ -48,64 +59,250 @@ int strcasecmp (char *s1, char *s2)
 }
 #endif
 
-void proceed_question(void)
+/*
+ * 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)
+{
+       longjmp(alarm_env, 1);
+}
+
+void proceed_question(int delay)
 {
        char buf[256];
        const char *short_yes = _("yY");
 
        fflush(stdout);
        fflush(stderr);
-       printf(_("Proceed anyway? (y,n) "));
+       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) ? (y,n) "),
+                      delay);
+               alarm(delay);
+       } else
+               fputs(_("Proceed anyway? (y,n) "), stdout);
        buf[0] = 0;
-       fgets(buf, sizeof(buf), stdin);
-       if (strchr(short_yes, buf[0]) == 0)
+       if (!fgets(buf, sizeof(buf), stdin) ||
+           strchr(short_yes, buf[0]) == 0) {
+               putc('\n', stdout);
                exit(1);
+       }
+       signal(SIGALRM, SIG_IGN);
 }
 
-void check_plausibility(const char *device)
+static void print_ext2_info(const char *device)
+
 {
-       int val;
-#ifdef HAVE_OPEN64
-       struct stat64 s;
-       
-       val = stat64(device, &s);
+       struct ext2_super_block *sb;
+       ext2_filsys             fs;
+       errcode_t               retval;
+       time_t                  tm;
+       char                    buf[80];
+
+       retval = ext2fs_open2(device, 0, EXT2_FLAG_64BITS, 0, 0,
+                             unix_io_manager, &fs);
+       if (retval)
+               return;
+       sb = fs->super;
+
+       if (sb->s_mtime) {
+               tm = sb->s_mtime;
+               if (sb->s_last_mounted[0]) {
+                       memset(buf, 0, sizeof(buf));
+                       strncpy(buf, sb->s_last_mounted,
+                               sizeof(sb->s_last_mounted));
+                       printf(_("\tlast mounted on %s on %s"), buf,
+                              ctime(&tm));
+               } else
+                       printf(_("\tlast mounted on %s"), ctime(&tm));
+       } else if (sb->s_mkfs_time) {
+               tm = sb->s_mkfs_time;
+               printf(_("\tcreated on %s"), ctime(&tm));
+       } else if (sb->s_wtime) {
+               tm = sb->s_wtime;
+               printf(_("\tlast modified on %s"), ctime(&tm));
+       }
+       ext2fs_close_free(&fs);
+}
+
+/*
+ * return 1 if there is no partition table, 0 if a partition table is
+ * detected, and -1 on an error.
+ */
+static int check_partition_table(const char *device)
+{
+#ifdef HAVE_BLKID_PROBE_ENABLE_PARTITIONS
+       blkid_probe pr;
+       const char *value;
+       int ret;
+
+       pr = blkid_new_probe_from_filename(device);
+       if (!pr)
+               return -1;
+
+        ret = blkid_probe_enable_partitions(pr, 1);
+        if (ret < 0)
+               goto errout;
+
+       ret = blkid_probe_enable_superblocks(pr, 0);
+       if (ret < 0)
+               goto errout;
+
+       ret = blkid_do_fullprobe(pr);
+       if (ret < 0)
+               goto errout;
+
+       ret = blkid_probe_lookup_value(pr, "PTTYPE", &value, NULL);
+       if (ret == 0)
+               fprintf(stderr, _("Found a %s partition table in %s\n"),
+                       value, device);
+       else
+               ret = 1;
+
+errout:
+       blkid_free_probe(pr);
+       return ret;
 #else
-       struct stat s;
-       
-       val = stat(device, &s);
+       return -1;
 #endif
-       
-       if(val == -1) {
-               fprintf(stderr, _("Could not stat %s --- %s\n"),
+}
+
+/*
+ * return 1 if the device looks plausible, creating the file if necessary
+ */
+int check_plausibility(const char *device, int flags, int *ret_is_dev)
+{
+       int fd, ret, is_dev = 0;
+       ext2fs_struct_stat s;
+       int fl = O_RDONLY;
+       blkid_cache cache = NULL;
+       char *fs_type = NULL;
+       char *fs_label = NULL;
+
+       fd = ext2fs_open_file(device, fl, 0666);
+       if ((fd < 0) && (errno == ENOENT) && (flags & NO_SIZE)) {
+               fprintf(stderr, _("The file %s does not exist and no "
+                                 "size was specified.\n"), device);
+               exit(1);
+       }
+       if ((fd < 0) && (errno == ENOENT) && (flags & CREATE_FILE)) {
+               fl |= O_CREAT;
+               fd = ext2fs_open_file(device, fl, 0666);
+               if (fd >= 0 && (flags & VERBOSE_CREATE))
+                       printf(_("Creating regular file %s\n"), device);
+       }
+       if (fd < 0) {
+               fprintf(stderr, _("Could not open %s: %s\n"),
                        device, error_message(errno));
                if (errno == ENOENT)
-                       fprintf(stderr, _("\nThe device apparently does "
-                              "not exist; did you specify it correctly?\n"));
+                       fputs(_("\nThe device apparently does not exist; "
+                               "did you specify it correctly?\n"), stderr);
                exit(1);
        }
-       if (!S_ISBLK(s.st_mode)) {
+
+       if (ext2fs_fstat(fd, &s) < 0) {
+               perror("stat");
+               exit(1);
+       }
+       close(fd);
+
+       if (S_ISBLK(s.st_mode))
+               is_dev = 1;
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
+       /* On FreeBSD, all disk devices are character specials */
+       if (S_ISCHR(s.st_mode))
+               is_dev = 1;
+#endif
+       if (ret_is_dev)
+               *ret_is_dev = is_dev;
+
+       if ((flags & CHECK_BLOCK_DEV) && !is_dev) {
                printf(_("%s is not a block special device.\n"), device);
-               proceed_question();
-               return;
+               return 0;
        }
 
+       /*
+        * Note: we use the older-style blkid API's here because we
+        * want as much functionality to be available when using the
+        * internal blkid library, when e2fsprogs is compiled for
+        * non-Linux systems that will probably not have the libraries
+        * from util-linux available.  We only use the newer
+        * blkid-probe interfaces to access functionality not
+        * available in the original blkid library.
+        */
+       if ((flags & CHECK_FS_EXIST) && blkid_get_cache(&cache, NULL) >= 0) {
+               fs_type = blkid_get_tag_value(cache, "TYPE", device);
+               if (fs_type)
+                       fs_label = blkid_get_tag_value(cache, "LABEL", device);
+               blkid_put_cache(cache);
+       }
+
+       if (fs_type) {
+               if (fs_label)
+                       printf(_("%s contains a %s file system "
+                                "labelled '%s'\n"), device, fs_type, fs_label);
+               else
+                       printf(_("%s contains a %s file system\n"), device,
+                              fs_type);
+               if (strncmp(fs_type, "ext", 3) == 0)
+                       print_ext2_info(device);
+               free(fs_type);
+               free(fs_label);
+               return 0;
+       }
+
+       ret = check_partition_table(device);
+       if (ret >= 0)
+               return ret;
+
 #ifdef HAVE_LINUX_MAJOR_H
 #ifndef MAJOR
 #define MAJOR(dev)     ((dev)>>8)
 #define MINOR(dev)     ((dev) & 0xff)
 #endif
 #ifndef SCSI_BLK_MAJOR
+#ifdef SCSI_DISK0_MAJOR
+#ifdef SCSI_DISK8_MAJOR
+#define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \
+  ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR) || \
+  ((M) >= SCSI_DISK8_MAJOR && (M) <= SCSI_DISK15_MAJOR))
+#else
+#define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \
+  ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR))
+#endif /* defined(SCSI_DISK8_MAJOR) */
+#define SCSI_BLK_MAJOR(M) (SCSI_DISK_MAJOR((M)) || (M) == SCSI_CDROM_MAJOR)
+#else
 #define SCSI_BLK_MAJOR(M)  ((M) == SCSI_DISK_MAJOR || (M) == SCSI_CDROM_MAJOR)
-#endif
+#endif /* defined(SCSI_DISK0_MAJOR) */
+#endif /* defined(SCSI_BLK_MAJOR) */
        if (((MAJOR(s.st_rdev) == HD_MAJOR &&
              MINOR(s.st_rdev)%64 == 0) ||
             (SCSI_BLK_MAJOR(MAJOR(s.st_rdev)) &&
              MINOR(s.st_rdev)%16 == 0))) {
                printf(_("%s is entire device, not just one partition!\n"),
                       device);
-               proceed_question();
+               return 0;
        }
 #endif
+       return 1;
 }
 
 void check_mount(const char *device, int force, const char *type)
@@ -120,17 +317,26 @@ void check_mount(const char *device, int force, const char *type)
                        device);
                return;
        }
-       if (!(mount_flags & EXT2_MF_MOUNTED))
-               return;
-
-       fprintf(stderr, _("%s is mounted; "), device);
-       if (force) {
-               fprintf(stderr, _("mke2fs forced anyway.  "
-                       "Hope /etc/mtab is incorrect.\n"));
-       } else {
+       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)
@@ -142,8 +348,8 @@ void parse_journal_opts(const char *opts)
        len = strlen(opts);
        buf = malloc(len+1);
        if (!buf) {
-               fprintf(stderr, _("Couldn't allocate memory to parse "
-                       "journal options!\n"));
+               fputs(_("Couldn't allocate memory to parse journal "
+                       "options!\n"), stderr);
                exit(1);
        }
        strcpy(buf, opts);
@@ -153,7 +359,7 @@ void parse_journal_opts(const char *opts)
                if (p) {
                        *p = 0;
                        next = p+1;
-               } 
+               }
                arg = strchr(token, '=');
                if (arg) {
                        *arg = 0;
@@ -164,8 +370,12 @@ void parse_journal_opts(const char *opts)
                       arg ? arg : "NONE");
 #endif
                if (strcmp(token, "device") == 0) {
-                       journal_device = interpret_spec(arg);
+                       journal_device = blkid_get_devname(NULL, arg, NULL);
                        if (!journal_device) {
+                               if (arg)
+                                       fprintf(stderr, _("\nCould not find "
+                                               "journal device matching %s\n"),
+                                               arg);
                                journal_usage++;
                                continue;
                        }
@@ -177,6 +387,12 @@ void parse_journal_opts(const char *opts)
                        journal_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;
@@ -184,71 +400,82 @@ void parse_journal_opts(const char *opts)
                        journal_usage++;
        }
        if (journal_usage) {
-               fprintf(stderr, _("\nBad journal options specified.\n\n"
+               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 raid options are:\n"
+                       "Valid journal options are:\n"
                        "\tsize=<journal size in megabytes>\n"
-                       "\tdevice=<journal device>\n\n"
+                       "\tdevice=<journal device>\n"
+                       "\tlocation=<journal location>\n\n"
                        "The journal size must be between "
-                       "1024 and 102400 filesystem blocks.\n\n" ));
+                       "1024 and 10240000 filesystem blocks.\n\n"), stderr);
+               free(buf);
                exit(1);
        }
-}      
+       free(buf);
+}
 
 /*
  * 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.
  */
-int figure_journal_size(int size, ext2_filsys fs)
+unsigned int figure_journal_size(int size, ext2_filsys fs)
 {
-       blk_t j_blocks;
+       int j_blocks;
 
-       if (fs->super->s_blocks_count < 2048) {
-               fprintf(stderr, _("\nFilesystem too small for a journal\n"));
+       j_blocks = ext2fs_default_journal_size(ext2fs_blocks_count(fs->super));
+       if (j_blocks < 0) {
+               fputs(_("\nFilesystem too small for a journal\n"), stderr);
                return 0;
        }
-       
-       if (size >= 0) {
+
+       if (size > 0) {
                j_blocks = size * 1024 / (fs->blocksize / 1024);
-               if (j_blocks < 1024 || j_blocks > 102400) {
+               if (j_blocks < 1024 || j_blocks > 10240000) {
                        fprintf(stderr, _("\nThe requested journal "
                                "size is %d blocks; it must be\n"
-                               "between 1024 and 102400 blocks.  "
+                               "between 1024 and 10240000 blocks.  "
                                "Aborting.\n"),
                                j_blocks);
                        exit(1);
                }
-               if (j_blocks > fs->super->s_free_blocks_count) {
-                       fprintf(stderr, _("\nJournal size too big "
-                                         "for filesystem.\n"));
+               if ((unsigned) j_blocks > ext2fs_free_blocks_count(fs->super) / 2) {
+                       fputs(_("\nJournal size too big for filesystem.\n"),
+                             stderr);
                        exit(1);
                }
-               return j_blocks;
        }
-
-       if (fs->super->s_blocks_count < 32768)
-               j_blocks = 1024;
-       else if (fs->super->s_blocks_count < 262144)
-               j_blocks = 4096;
-       else
-               j_blocks = 8192;
-
        return j_blocks;
 }
 
-void print_check_message(ext2_filsys fs)
+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"),
-              fs->super->s_max_mnt_count,
-              (double)fs->super->s_checkinterval / (3600 * 24));
+              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: last update: %s node: %s device: %s\n",
+                      ctime(&t), mmp->mmp_nodename, mmp->mmp_bdevname);
+       }
 }