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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:30:35 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:30:35 +0000
commit378c18e5f024ac5a8aef4cb40d7c9aa9633d144c (patch)
tree44dfb6ca500d32cabd450649b322a42e70a30683 /sys-utils/fsfreeze.c
parentInitial commit. (diff)
downloadutil-linux-upstream.tar.xz
util-linux-upstream.zip
Adding upstream version 2.38.1.upstream/2.38.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sys-utils/fsfreeze.c')
-rw-r--r--sys-utils/fsfreeze.c150
1 files changed, 150 insertions, 0 deletions
diff --git a/sys-utils/fsfreeze.c b/sys-utils/fsfreeze.c
new file mode 100644
index 0000000..cd2bb47
--- /dev/null
+++ b/sys-utils/fsfreeze.c
@@ -0,0 +1,150 @@
+/*
+ * fsfreeze.c -- Filesystem freeze/unfreeze IO for Linux
+ *
+ * Copyright (C) 2010 Hajime Taira <htaira@redhat.com>
+ * Masatake Yamato <yamato@redhat.com>
+ *
+ * This program is free software. You can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation: either version 1 or
+ * (at your option) any later version.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <fcntl.h>
+#include <linux/fs.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <getopt.h>
+
+#include "c.h"
+#include "blkdev.h"
+#include "nls.h"
+#include "closestream.h"
+#include "optutils.h"
+
+enum fs_operation {
+ NOOP,
+ FREEZE,
+ UNFREEZE
+};
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+ FILE *out = stdout;
+ fputs(USAGE_HEADER, out);
+ fprintf(out,
+ _(" %s [options] <mountpoint>\n"), program_invocation_short_name);
+
+ fputs(USAGE_SEPARATOR, out);
+ fputs(_("Suspend access to a filesystem.\n"), out);
+
+ fputs(USAGE_OPTIONS, out);
+ fputs(_(" -f, --freeze freeze the filesystem\n"), out);
+ fputs(_(" -u, --unfreeze unfreeze the filesystem\n"), out);
+ fputs(USAGE_SEPARATOR, out);
+ printf(USAGE_HELP_OPTIONS(19));
+ printf(USAGE_MAN_TAIL("fsfreeze(8)"));
+
+ exit(EXIT_SUCCESS);
+}
+
+int main(int argc, char **argv)
+{
+ int fd = -1, c;
+ int action = NOOP, rc = EXIT_FAILURE;
+ char *path;
+ struct stat sb;
+
+ static const struct option longopts[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "freeze", no_argument, NULL, 'f' },
+ { "unfreeze", no_argument, NULL, 'u' },
+ { "version", no_argument, NULL, 'V' },
+ { NULL, 0, NULL, 0 }
+ };
+
+ static const ul_excl_t excl[] = { /* rows and cols in ASCII order */
+ { 'f','u' }, /* freeze, unfreeze */
+ { 0 }
+ };
+ int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
+
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
+ close_stdout_atexit();
+
+ while ((c = getopt_long(argc, argv, "hfuV", longopts, NULL)) != -1) {
+
+ err_exclusive_options(c, longopts, excl, excl_st);
+
+ switch(c) {
+ case 'f':
+ action = FREEZE;
+ break;
+ case 'u':
+ action = UNFREEZE;
+ break;
+
+ case 'h':
+ usage();
+ case 'V':
+ print_version(EXIT_SUCCESS);
+ default:
+ errtryhelp(EXIT_FAILURE);
+ }
+ }
+
+ if (action == NOOP)
+ errx(EXIT_FAILURE, _("neither --freeze or --unfreeze specified"));
+ if (optind == argc)
+ errx(EXIT_FAILURE, _("no filename specified"));
+ path = argv[optind++];
+
+ if (optind != argc) {
+ warnx(_("unexpected number of arguments"));
+ errtryhelp(EXIT_FAILURE);
+ }
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0)
+ err(EXIT_FAILURE, _("cannot open %s"), path);
+
+ if (fstat(fd, &sb) == -1) {
+ warn(_("stat of %s failed"), path);
+ goto done;
+ }
+
+ if (!S_ISDIR(sb.st_mode)) {
+ warnx(_("%s: is not a directory"), path);
+ goto done;
+ }
+
+ switch (action) {
+ case FREEZE:
+ if (ioctl(fd, FIFREEZE, 0)) {
+ warn(_("%s: freeze failed"), path);
+ goto done;
+ }
+ break;
+ case UNFREEZE:
+ if (ioctl(fd, FITHAW, 0)) {
+ warn(_("%s: unfreeze failed"), path);
+ goto done;
+ }
+ break;
+ default:
+ abort();
+ }
+
+ rc = EXIT_SUCCESS;
+done:
+ close(fd);
+ return rc;
+}
+