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-rw-r--r--misc/util.c330
1 files changed, 330 insertions, 0 deletions
diff --git a/misc/util.c b/misc/util.c
new file mode 100644
index 0000000..3e83169
--- /dev/null
+++ b/misc/util.c
@@ -0,0 +1,330 @@
+/*
+ * 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));
+ }
+}
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