From 8cb83eee5a58b1fad74c34094ce3afb9e430b5a4 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Mon, 6 May 2024 04:42:50 +0200
Subject: Adding upstream version 2.33.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 disk-utils/swaplabel.c | 195 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 195 insertions(+)
 create mode 100644 disk-utils/swaplabel.c

(limited to 'disk-utils/swaplabel.c')

diff --git a/disk-utils/swaplabel.c b/disk-utils/swaplabel.c
new file mode 100644
index 0000000..ccc226a
--- /dev/null
+++ b/disk-utils/swaplabel.c
@@ -0,0 +1,195 @@
+/*
+ * swaplabel.c - Print or change the label / UUID of a swap partition
+ *
+ * Copyright (C) 2010 Jason Borden <jborden@bluehost.com>
+ * Copyright (C) 2010 Karel Zak <kzak@redhat.com>
+ *
+ * Usage: swaplabel [-L label] [-U UUID] device
+ *
+ * This file may be redistributed under the terms of the GNU Public License
+ * version 2 or later.
+ *
+ */
+#include <stdio.h>
+#include <stddef.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <getopt.h>
+
+#ifdef HAVE_LIBUUID
+# include <uuid.h>
+#endif
+
+#include "c.h"
+#include "nls.h"
+#include "all-io.h"
+#include "strutils.h"
+#include "closestream.h"
+
+#include "swapheader.h"
+#include "swapprober.h"
+
+#define SWAP_UUID_OFFSET	(offsetof(struct swap_header_v1_2, uuid))
+#define SWAP_LABEL_OFFSET	(offsetof(struct swap_header_v1_2, volume_name))
+
+/* Print the swap partition information */
+static int print_info(blkid_probe pr)
+{
+	const char *data;
+
+	if (!blkid_probe_lookup_value(pr, "LABEL", &data, NULL))
+		printf("LABEL: %s\n", data);
+
+	if (!blkid_probe_lookup_value(pr, "UUID", &data, NULL))
+		printf("UUID:  %s\n", data);
+
+	return 0;
+}
+
+/* Change the swap partition info */
+#ifdef HAVE_LIBUUID
+static int change_info(const char *devname, const char *label, const char *uuid)
+#else
+static int change_info(const char *devname, const char *label,
+		       const char *uuid __attribute__((__unused__)))
+#endif
+{
+	int fd;
+
+	fd = open(devname, O_RDWR);
+	if (fd < 0) {
+		warn(_("cannot open %s"), devname);
+		goto err;
+	}
+#ifdef HAVE_LIBUUID
+	/* Write the uuid if it was provided */
+	if (uuid) {
+		uuid_t newuuid;
+
+		if (uuid_parse(uuid, newuuid) == -1)
+			warnx(_("failed to parse UUID: %s"), uuid);
+		else {
+			if (lseek(fd, SWAP_UUID_OFFSET, SEEK_SET) !=
+							SWAP_UUID_OFFSET) {
+				warn(_("%s: failed to seek to swap UUID"), devname);
+				goto err;
+
+			} else if (write_all(fd, newuuid, sizeof(newuuid))) {
+				warn(_("%s: failed to write UUID"), devname);
+				goto err;
+			}
+		}
+	}
+#endif
+	/* Write the label if it was provided */
+	if (label) {
+		char newlabel[SWAP_LABEL_LENGTH];
+
+		if (lseek(fd, SWAP_LABEL_OFFSET, SEEK_SET) != SWAP_LABEL_OFFSET) {
+			warn(_("%s: failed to seek to swap label "), devname);
+			goto err;
+		}
+		memset(newlabel, 0, sizeof(newlabel));
+		xstrncpy(newlabel, label, sizeof(newlabel));
+
+		if (strlen(label) > strlen(newlabel))
+			warnx(_("label is too long. Truncating it to '%s'"),
+					newlabel);
+		if (write_all(fd, newlabel, sizeof(newlabel))) {
+			warn(_("%s: failed to write label"), devname);
+			goto err;
+		}
+	}
+
+	if (close_fd(fd) != 0) {
+		warn(_("write failed: %s"), devname);
+		return -1;
+	}
+	return 0;
+err:
+	if (fd >= 0)
+		close(fd);
+	return -1;
+}
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+	FILE *out = stdout;
+	fputs(USAGE_HEADER, out);
+	fprintf(out, _(" %s [options] <device>\n"),
+		program_invocation_short_name);
+
+	fputs(USAGE_SEPARATOR, out);
+	fputs(_("Display or change the label or UUID of a swap area.\n"), out);
+
+	fputs(USAGE_OPTIONS, out);
+	fputs(_(" -L, --label <label> specify a new label\n"
+		" -U, --uuid <uuid>   specify a new uuid\n"), out);
+	fputs(USAGE_SEPARATOR, out);
+	printf(USAGE_HELP_OPTIONS(21));
+	printf(USAGE_MAN_TAIL("swaplabel(8)"));
+	exit(EXIT_SUCCESS);
+}
+
+int main(int argc, char *argv[])
+{
+	blkid_probe pr = NULL;
+	char *uuid = NULL, *label = NULL, *devname;
+	int c, rc = -1;
+
+	static const struct option longopts[] = {
+	    { "help",      no_argument,       NULL, 'h' },
+	    { "version",   no_argument,       NULL, 'V' },
+	    { "label",     required_argument, NULL, 'L' },
+	    { "uuid",      required_argument, NULL, 'U' },
+	    { NULL,        0, NULL, 0 }
+	};
+
+	setlocale(LC_ALL, "");
+	bindtextdomain(PACKAGE, LOCALEDIR);
+	textdomain(PACKAGE);
+	atexit(close_stdout);
+
+	while ((c = getopt_long(argc, argv, "hVL:U:", longopts, NULL)) != -1) {
+		switch (c) {
+		case 'h':
+			usage();
+			break;
+		case 'V':
+			printf(UTIL_LINUX_VERSION);
+			return EXIT_SUCCESS;
+		case 'L':
+			label = optarg;
+			break;
+		case 'U':
+#ifdef HAVE_LIBUUID
+			uuid = optarg;
+#else
+			warnx(_("ignore -U (UUIDs are unsupported)"));
+#endif
+			break;
+		default:
+			errtryhelp(EXIT_FAILURE);
+		}
+	}
+
+	if (optind == argc) {
+		warnx(_("no device specified"));
+		errtryhelp(EXIT_FAILURE);
+	}
+	devname = argv[optind];
+	pr = get_swap_prober(devname);
+	if (pr) {
+		if (uuid || label)
+			rc = change_info(devname, label, uuid);
+		else
+			rc  = print_info(pr);
+		blkid_free_probe(pr);
+	}
+	return rc ? EXIT_FAILURE : EXIT_SUCCESS;
+}
+
-- 
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