1 files changed, 152 insertions, 0 deletions
diff --git a/sys-utils/fsfreeze.c b/sys-utils/fsfreeze.c
new file mode 100644
index 0000000..401ab5c
--- /dev/null
+++ b/sys-utils/fsfreeze.c
@@ -0,0 +1,152 @@
+/*
+ * 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);
+	atexit(close_stdout);
+
+	while ((c = getopt_long(argc, argv, "hfuV", longopts, NULL)) != -1) {
+
+		err_exclusive_options(c, longopts, excl, excl_st);
+
+		switch(c) {
+		case 'h':
+			usage();
+			break;
+		case 'f':
+			action = FREEZE;
+			break;
+		case 'u':
+			action = UNFREEZE;
+			break;
+		case 'V':
+			printf(UTIL_LINUX_VERSION);
+			exit(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:
+	if (fd >= 0)
+		close(fd);
+	return rc;
+}
+