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295 lines
6.4 KiB
295 lines
6.4 KiB
/*
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* util.c --- helper functions used by tune2fs and mke2fs
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*
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* Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Public
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* License.
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* %End-Header%
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*/
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#ifndef _LARGEFILE_SOURCE
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#define _LARGEFILE_SOURCE
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#endif
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#ifndef _LARGEFILE64_SOURCE
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#define _LARGEFILE64_SOURCE
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#endif
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#include "config.h"
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#include <fcntl.h>
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#include <setjmp.h>
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#include <signal.h>
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#include <stdio.h>
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#include <string.h>
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#ifdef HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_LINUX_MAJOR_H
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#include <linux/major.h>
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#endif
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#include <sys/types.h>
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <time.h>
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#include "et/com_err.h"
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#include "e2p/e2p.h"
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#include "ext2fs/ext2_fs.h"
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#include "ext2fs/ext2fs.h"
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#include "support/nls-enable.h"
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#include "blkid/blkid.h"
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#include "util.h"
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char *journal_location_string = NULL;
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#ifndef HAVE_STRCASECMP
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int strcasecmp (char *s1, char *s2)
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{
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while (*s1 && *s2) {
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int ch1 = *s1++, ch2 = *s2++;
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if (isupper (ch1))
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ch1 = tolower (ch1);
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if (isupper (ch2))
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ch2 = tolower (ch2);
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if (ch1 != ch2)
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return ch1 - ch2;
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}
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return *s1 ? 1 : *s2 ? -1 : 0;
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}
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#endif
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/*
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* Given argv[0], return the program name.
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*/
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char *get_progname(char *argv_zero)
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{
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char *cp;
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cp = strrchr(argv_zero, '/');
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if (!cp )
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return argv_zero;
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else
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return cp+1;
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}
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static jmp_buf alarm_env;
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static void alarm_signal(int signal EXT2FS_ATTR((unused)))
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{
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longjmp(alarm_env, 1);
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}
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void proceed_question(int delay)
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{
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char buf[256];
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const char *short_yes = _("yY");
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const char *english_yes = "yY";
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fflush(stdout);
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fflush(stderr);
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if (delay > 0) {
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if (setjmp(alarm_env)) {
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signal(SIGALRM, SIG_IGN);
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printf("%s", _("<proceeding>\n"));
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return;
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}
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signal(SIGALRM, alarm_signal);
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printf(_("Proceed anyway (or wait %d seconds to proceed) ? (y,N) "),
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delay);
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alarm(delay);
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} else
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fputs(_("Proceed anyway? (y,N) "), stdout);
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buf[0] = 0;
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if (!fgets(buf, sizeof(buf), stdin) ||
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strchr(_("nN"), buf[0]) ||
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!(strchr(short_yes, buf[0]) ||
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strchr(english_yes, buf[0]))) {
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putc('\n', stdout);
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exit(1);
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}
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signal(SIGALRM, SIG_IGN);
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}
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void check_mount(const char *device, int force, const char *type)
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{
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errcode_t retval;
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int mount_flags;
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retval = ext2fs_check_if_mounted(device, &mount_flags);
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if (retval) {
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com_err("ext2fs_check_if_mount", retval,
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_("while determining whether %s is mounted."),
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device);
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return;
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}
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if (mount_flags & EXT2_MF_MOUNTED) {
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fprintf(stderr, _("%s is mounted; "), device);
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if (force >= 2) {
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fputs(_("mke2fs forced anyway. Hope /etc/mtab is "
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"incorrect.\n"), stderr);
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return;
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}
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abort_mke2fs:
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fprintf(stderr, _("will not make a %s here!\n"), type);
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exit(1);
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}
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if (mount_flags & EXT2_MF_BUSY) {
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fprintf(stderr, _("%s is apparently in use by the system; "),
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device);
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if (force >= 2) {
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fputs(_("mke2fs forced anyway.\n"), stderr);
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return;
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}
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goto abort_mke2fs;
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}
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}
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void parse_journal_opts(const char *opts)
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{
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char *buf, *token, *next, *p, *arg;
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int len;
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int journal_usage = 0;
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len = strlen(opts);
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buf = malloc(len+1);
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if (!buf) {
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fputs(_("Couldn't allocate memory to parse journal "
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"options!\n"), stderr);
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exit(1);
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}
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strcpy(buf, opts);
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for (token = buf; token && *token; token = next) {
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p = strchr(token, ',');
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next = 0;
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if (p) {
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*p = 0;
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next = p+1;
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}
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arg = strchr(token, '=');
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if (arg) {
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*arg = 0;
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arg++;
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}
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#if 0
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printf("Journal option=%s, argument=%s\n", token,
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arg ? arg : "NONE");
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#endif
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if (strcmp(token, "device") == 0) {
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journal_device = blkid_get_devname(NULL, arg, NULL);
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if (!journal_device) {
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if (arg)
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fprintf(stderr, _("\nCould not find "
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"journal device matching %s\n"),
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arg);
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journal_usage++;
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continue;
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}
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} else if (strcmp(token, "size") == 0) {
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if (!arg) {
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journal_usage++;
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continue;
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}
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journal_size = strtoul(arg, &p, 0);
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if (*p)
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journal_usage++;
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} else if (!strcmp(token, "location")) {
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if (!arg) {
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journal_usage++;
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continue;
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}
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journal_location_string = strdup(arg);
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} else if (strcmp(token, "v1_superblock") == 0) {
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journal_flags |= EXT2_MKJOURNAL_V1_SUPER;
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continue;
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} else
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journal_usage++;
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}
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if (journal_usage) {
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fputs(_("\nBad journal options specified.\n\n"
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"Journal options are separated by commas, "
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"and may take an argument which\n"
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"\tis set off by an equals ('=') sign.\n\n"
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"Valid journal options are:\n"
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"\tsize=<journal size in megabytes>\n"
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"\tdevice=<journal device>\n"
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"\tlocation=<journal location>\n\n"
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"The journal size must be between "
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"1024 and 10240000 filesystem blocks.\n\n"), stderr);
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free(buf);
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exit(1);
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}
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free(buf);
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}
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/*
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* Determine the number of journal blocks to use, either via
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* user-specified # of megabytes, or via some intelligently selected
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* defaults.
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*
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* Find a reasonable journal file size (in blocks) given the number of blocks
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* in the filesystem. For very small filesystems, it is not reasonable to
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* have a journal that fills more than half of the filesystem.
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*/
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unsigned int figure_journal_size(int size, ext2_filsys fs)
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{
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int j_blocks;
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j_blocks = ext2fs_default_journal_size(ext2fs_blocks_count(fs->super));
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if (j_blocks < 0) {
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fputs(_("\nFilesystem too small for a journal\n"), stderr);
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return 0;
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}
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if (size > 0) {
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j_blocks = size * 1024 / (fs->blocksize / 1024);
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if (j_blocks < 1024 || j_blocks > 10240000) {
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fprintf(stderr, _("\nThe requested journal "
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"size is %d blocks; it must be\n"
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"between 1024 and 10240000 blocks. "
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"Aborting.\n"),
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j_blocks);
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exit(1);
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}
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if ((unsigned) j_blocks > ext2fs_free_blocks_count(fs->super) / 2) {
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fputs(_("\nJournal size too big for filesystem.\n"),
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stderr);
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exit(1);
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}
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}
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return j_blocks;
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}
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void print_check_message(int mnt, unsigned int check)
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{
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if (mnt < 0)
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mnt = 0;
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if (!mnt && !check)
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return;
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printf(_("This filesystem will be automatically "
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"checked every %d mounts or\n"
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"%g days, whichever comes first. "
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"Use tune2fs -c or -i to override.\n"),
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mnt, ((double) check) / (3600 * 24));
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}
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void dump_mmp_msg(struct mmp_struct *mmp, const char *msg)
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{
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if (msg)
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printf("MMP check failed: %s\n", msg);
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if (mmp) {
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time_t t = mmp->mmp_time;
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printf("MMP error info: last update: %s node: %s device: %s\n",
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ctime(&t), mmp->mmp_nodename, mmp->mmp_bdevname);
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}
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}
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