*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
- * Licensed under the GPL v2, see the file LICENSE in this tarball.
+ * Licensed under GPLv2, see file LICENSE in this source tree.
*/
-#include <stdio.h>
+#include "libbb.h"
#include <mntent.h>
-#include <dirent.h>
-#include <errno.h>
-#include <string.h>
-#include <stdlib.h>
-#include <sys/mount.h>
#include <sys/swap.h>
-#include "busybox.h"
-
-static int swap_enable_disable(const char *device)
+#if ENABLE_FEATURE_MOUNT_LABEL
+# include "volume_id.h"
+#else
+# define resolve_mount_spec(fsname) ((void)0)
+#endif
+
+#if ENABLE_FEATURE_SWAPON_PRI
+struct globals {
+ int flags;
+} FIX_ALIASING;
+#define G (*(struct globals*)&bb_common_bufsiz1)
+#define g_flags (G.flags)
+#else
+#define g_flags 0
+#endif
+
+static int swap_enable_disable(char *device)
{
int status;
struct stat st;
- if (stat(device, &st) < 0)
- bb_perror_msg_and_die("cannot stat %s", device);
+ resolve_mount_spec(&device);
+ xstat(device, &st);
+#if ENABLE_DESKTOP
/* test for holes */
if (S_ISREG(st.st_mode))
- if (st.st_blocks * 512 < st.st_size)
- bb_error_msg_and_die("swap file has holes");
+ if (st.st_blocks * (off_t)512 < st.st_size)
+ bb_error_msg("warning: swap file has holes");
+#endif
- if (bb_applet_name[5] == 'n')
- status = swapon(device, 0);
+ if (applet_name[5] == 'n')
+ status = swapon(device, g_flags);
else
status = swapoff(device);
if (status != 0) {
- bb_perror_msg("%s", device);
- return EXIT_FAILURE;
+ bb_simple_perror_msg(device);
+ return 1;
}
- return EXIT_SUCCESS;
+ return 0;
}
static int do_em_all(void)
bb_perror_msg_and_die("/etc/fstab");
err = 0;
- while ((m = getmntent(f)) != NULL)
- if (strcmp(m->mnt_type, MNTTYPE_SWAP) == 0)
- if (swap_enable_disable(m->mnt_fsname) == EXIT_FAILURE)
- ++err;
+ while ((m = getmntent(f)) != NULL) {
+ if (strcmp(m->mnt_type, MNTTYPE_SWAP) == 0) {
+ /* swapon -a should ignore entries with noauto,
+ * but swapoff -a should process them */
+ if (applet_name[5] != 'n'
+ || hasmntopt(m, MNTOPT_NOAUTO) == NULL
+ ) {
+ err += swap_enable_disable(m->mnt_fsname);
+ }
+ }
+ }
- endmntent(f);
+ if (ENABLE_FEATURE_CLEAN_UP)
+ endmntent(f);
return err;
}
-#define DO_ALL 0x01
-
-extern int swap_on_off_main(int argc, char **argv)
+int swap_on_off_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int swap_on_off_main(int argc UNUSED_PARAM, char **argv)
{
- unsigned long opt = bb_getopt_ulflags(argc, argv, "a");
+ int ret;
+
+#if !ENABLE_FEATURE_SWAPON_PRI
+ ret = getopt32(argv, "a");
+#else
+ opt_complementary = "p+";
+ ret = getopt32(argv, (applet_name[5] == 'n') ? "ap:" : "a", &g_flags);
+
+ if (ret & 2) { // -p
+ g_flags = SWAP_FLAG_PREFER |
+ ((g_flags & SWAP_FLAG_PRIO_MASK) << SWAP_FLAG_PRIO_SHIFT);
+ ret &= 1;
+ }
+#endif
- if (argc != 2)
+ if (ret /* & 1: not needed */) // -a
+ return do_em_all();
+
+ argv += optind;
+ if (!*argv)
bb_show_usage();
- if (opt & DO_ALL)
- return do_em_all();
+ /* ret = 0; redundant */
+ do {
+ ret += swap_enable_disable(*argv);
+ } while (*++argv);
- return swap_enable_disable(argv[1]);
+ return ret;
}