2006-12-06 17:25:32 -06:00
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/*
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* A swapon(8)/swapoff(8) for Linux 0.99.
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*/
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2006-12-06 17:25:34 -06:00
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#include <stdlib.h>
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#include <stdio.h>
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#include <getopt.h>
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#include <string.h>
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#include <mntent.h>
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#include <errno.h>
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2006-12-06 17:25:37 -06:00
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#include <sys/stat.h>
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2007-06-13 04:52:55 -05:00
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#include <unistd.h>
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2008-03-20 03:24:03 -05:00
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <fcntl.h>
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2008-11-27 05:32:56 -06:00
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#include <stdint.h>
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2009-03-02 08:16:21 -06:00
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#include <err.h>
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2009-03-02 07:21:03 -06:00
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2008-11-27 05:32:56 -06:00
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#include "bitops.h"
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#include "blkdev.h"
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2006-12-06 17:25:37 -06:00
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#include "swap_constants.h"
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2006-12-06 17:25:39 -06:00
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#include "nls.h"
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2007-05-09 08:38:16 -05:00
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#include "fsprobe.h"
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2007-11-28 07:35:24 -06:00
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#include "pathnames.h"
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2008-11-27 05:32:56 -06:00
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#include "swapheader.h"
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2007-02-09 10:15:39 -06:00
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2008-03-20 03:24:03 -05:00
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#define PATH_MKSWAP "/sbin/mkswap"
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2007-06-13 04:52:55 -05:00
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#ifdef HAVE_SYS_SWAP_H
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# include <sys/swap.h>
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#endif
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#ifndef SWAPON_HAS_TWO_ARGS
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/* libc is insane, let's call the kernel */
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# include <sys/syscall.h>
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# define swapon(path, flags) syscall(SYS_swapon, path, flags)
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# define swapoff(path) syscall(SYS_swapoff, path)
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#endif
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2006-12-06 17:25:34 -06:00
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#define streq(s, t) (strcmp ((s), (t)) == 0)
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2006-12-06 17:25:58 -06:00
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#define QUIET 1
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2007-08-07 05:03:53 -05:00
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#define CANONIC 1
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2006-12-06 17:25:58 -06:00
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2008-11-27 05:32:56 -06:00
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#define MAX_PAGESIZE (64 * 1024)
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2009-03-02 06:00:49 -06:00
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enum {
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SIG_SWAPSPACE = 1,
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SIG_SWSUSPEND
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};
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2009-03-02 09:41:03 -06:00
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#define SWAP_SIGNATURE "SWAPSPACE2"
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#define SWAP_SIGNATURE_SZ (sizeof(SWAP_SIGNATURE) - 1)
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2009-03-02 07:21:03 -06:00
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int all;
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2006-12-06 17:25:33 -06:00
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int priority = -1; /* non-prioritized swap by default */
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2006-12-06 17:25:32 -06:00
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2006-12-06 17:26:05 -06:00
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/* If true, don't complain if the device/file doesn't exist */
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2009-03-02 07:21:03 -06:00
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int ifexists;
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2009-03-03 07:53:27 -06:00
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int fixpgsz;
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2009-03-02 07:21:03 -06:00
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int verbose;
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char *progname;
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2006-12-06 17:26:05 -06:00
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2006-12-06 17:25:58 -06:00
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static struct option longswaponopts[] = {
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/* swapon only */
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{ "priority", required_argument, 0, 'p' },
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2006-12-06 17:26:05 -06:00
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{ "ifexists", 0, 0, 'e' },
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2006-12-06 17:25:58 -06:00
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{ "summary", 0, 0, 's' },
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2009-03-03 07:53:27 -06:00
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{ "fixpgsz", 0, 0, 'f' },
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2006-12-06 17:25:58 -06:00
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/* also for swapoff */
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{ "all", 0, 0, 'a' },
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{ "help", 0, 0, 'h' },
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{ "verbose", 0, 0, 'v' },
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{ "version", 0, 0, 'V' },
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{ NULL, 0, 0, 0 }
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2006-12-06 17:25:32 -06:00
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};
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2009-03-03 07:53:27 -06:00
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static struct option *longswapoffopts = &longswaponopts[4];
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2006-12-06 17:25:58 -06:00
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2007-08-07 05:03:53 -05:00
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static int cannot_find(const char *special);
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2007-11-26 06:07:40 -06:00
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#define PRINT_USAGE_SPECIAL(_fp) \
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fprintf(_fp, _( \
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2007-11-28 08:01:14 -06:00
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"The <special> parameter:\n" \
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2007-11-28 13:18:48 -06:00
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" {-L label | LABEL=label} LABEL of device to be used\n" \
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" {-U uuid | UUID=uuid} UUID of device to be used\n" \
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" <device> name of device to be used\n" \
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" <file> name of file to be used\n\n"))
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2007-11-26 06:07:40 -06:00
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2006-12-06 17:25:32 -06:00
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static void
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2006-12-06 17:25:58 -06:00
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swapon_usage(FILE *fp, int n) {
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2007-11-26 06:07:40 -06:00
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fprintf(fp, _("\nUsage:\n"
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2009-03-03 07:53:27 -06:00
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" %1$s -a [-e] [-v] [-f] enable all swaps from /etc/fstab\n"
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" %1$s [-p priority] [-v] [-f] <special> enable given swap\n"
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2007-11-28 08:01:14 -06:00
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" %1$s -s display swap usage summary\n"
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" %1$s -h display help\n"
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" %1$s -V display version\n\n"), progname);
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2007-11-26 06:07:40 -06:00
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PRINT_USAGE_SPECIAL(fp);
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2006-12-06 17:25:58 -06:00
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exit(n);
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}
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static void
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swapoff_usage(FILE *fp, int n) {
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2007-11-26 06:07:40 -06:00
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fprintf(fp, _("\nUsage:\n"
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2007-11-28 13:18:48 -06:00
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" %1$s -a [-v] disable all swaps\n"
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" %1$s [-v] <special> disable given swap\n"
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" %1$s -h display help\n"
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" %1$s -V display version\n\n"), progname);
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2007-11-26 06:07:40 -06:00
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PRINT_USAGE_SPECIAL(fp);
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2006-12-06 17:25:58 -06:00
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exit(n);
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2006-12-06 17:25:32 -06:00
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}
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2006-12-06 17:25:58 -06:00
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/*
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* contents of /proc/swaps
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*/
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static int numSwaps;
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static char **swapFiles; /* array of swap file and partition names */
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2006-12-06 17:25:32 -06:00
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2006-12-06 17:25:58 -06:00
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static void
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read_proc_swaps(void) {
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FILE *swaps;
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char line[1024];
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2006-12-06 17:26:30 -06:00
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char *p, **q;
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2006-12-06 17:25:37 -06:00
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2006-12-06 17:25:58 -06:00
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numSwaps = 0;
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swapFiles = NULL;
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2006-12-06 17:25:34 -06:00
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2007-11-28 07:35:24 -06:00
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swaps = fopen(_PATH_PROC_SWAPS, "r");
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2006-12-06 17:25:58 -06:00
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if (swaps == NULL)
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return; /* nothing wrong */
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/* skip the first line */
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2007-10-03 16:15:32 -05:00
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if (!fgets(line, sizeof(line), swaps)) {
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2009-03-02 08:16:21 -06:00
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warnx(_("%s: unexpected file format"), _PATH_PROC_SWAPS);
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2007-10-03 16:15:32 -05:00
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fclose(swaps);
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return;
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}
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2006-12-06 17:25:58 -06:00
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while (fgets(line, sizeof(line), swaps)) {
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/*
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* Cut the line "swap_device ... more info" after device.
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* This will fail with names with embedded spaces.
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*/
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for (p = line; *p && *p != ' '; p++);
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*p = 0;
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2006-12-06 17:25:32 -06:00
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2006-12-06 17:26:30 -06:00
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q = realloc(swapFiles, (numSwaps+1) * sizeof(*swapFiles));
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if (q == NULL)
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break;
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swapFiles = q;
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swapFiles[numSwaps++] = strdup(line);
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2006-12-06 17:25:58 -06:00
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}
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fclose(swaps);
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}
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static int
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2006-12-06 17:26:31 -06:00
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is_in_proc_swaps(const char *fname) {
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2006-12-06 17:25:58 -06:00
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int i;
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for (i = 0; i < numSwaps; i++)
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2008-03-20 08:45:33 -05:00
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if (swapFiles[i] && !strcmp(fname, swapFiles[i]))
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2006-12-06 17:25:58 -06:00
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return 1;
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return 0;
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2006-12-06 17:25:32 -06:00
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}
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2006-12-06 17:25:34 -06:00
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static int
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display_summary(void)
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{
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FILE *swaps;
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2006-12-06 17:25:58 -06:00
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char line[1024] ;
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2006-12-06 17:25:34 -06:00
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2007-11-28 07:35:24 -06:00
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if ((swaps = fopen(_PATH_PROC_SWAPS, "r")) == NULL) {
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2009-03-02 08:16:21 -06:00
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warn(_("%s: open failed"), _PATH_PROC_SWAPS);
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2007-06-14 04:53:39 -05:00
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return -1;
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2006-12-06 17:25:34 -06:00
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}
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2006-12-06 17:25:49 -06:00
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2006-12-06 17:25:58 -06:00
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while (fgets(line, sizeof(line), swaps))
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printf("%s", line);
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2006-12-06 17:25:34 -06:00
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2006-12-06 17:25:49 -06:00
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fclose(swaps);
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2006-12-06 17:25:34 -06:00
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return 0 ;
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}
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2008-03-20 03:24:03 -05:00
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/* calls mkswap */
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static int
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swap_reinitialize(const char *device) {
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const char *label = fsprobe_get_label_by_devname(device);
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const char *uuid = fsprobe_get_uuid_by_devname(device);
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pid_t pid;
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int status, ret;
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char *cmd[7];
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int idx=0;
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2009-03-03 07:53:27 -06:00
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warnx(_("%s: reinitializing the swap."), device);
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2008-03-20 03:24:03 -05:00
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switch((pid=fork())) {
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case -1: /* fork error */
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2009-03-02 08:16:21 -06:00
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warn(_("fork failed"));
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2008-03-20 03:24:03 -05:00
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return -1;
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case 0: /* child */
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cmd[idx++] = PATH_MKSWAP;
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if (label && *label) {
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cmd[idx++] = "-L";
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cmd[idx++] = (char *) label;
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}
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if (uuid && *uuid) {
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cmd[idx++] = "-U";
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cmd[idx++] = (char *) uuid;
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}
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cmd[idx++] = (char *) device;
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cmd[idx++] = NULL;
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execv(cmd[0], cmd);
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2009-03-02 08:16:21 -06:00
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err(EXIT_FAILURE, _("execv failed"));
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2008-03-20 03:24:03 -05:00
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default: /* parent */
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do {
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if ((ret = waitpid(pid, &status, 0)) < 0
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&& errno == EINTR)
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continue;
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else if (ret < 0) {
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2009-03-02 08:16:21 -06:00
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warn(_("waitpid failed"));
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2008-03-20 03:24:03 -05:00
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return -1;
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}
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} while (0);
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/* mkswap returns: 0=suss, 1=error */
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if (WIFEXITED(status) && WEXITSTATUS(status)==0)
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return 0; /* ok */
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}
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return -1; /* error */
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}
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2009-03-02 09:41:03 -06:00
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static int
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swap_rewrite_signature(const char *devname, unsigned int pagesize)
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{
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int fd, rc = -1;
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fd = open(devname, O_WRONLY);
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if (fd == -1) {
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warn(_("%s: open failed"), devname);
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return -1;
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}
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if (lseek(fd, pagesize - SWAP_SIGNATURE_SZ, SEEK_SET) < 0)
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goto err;
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if (write(fd, (void *) SWAP_SIGNATURE,
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SWAP_SIGNATURE_SZ) != SWAP_SIGNATURE_SZ)
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goto err;
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rc = 0;
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err:
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close(fd);
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return rc;
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}
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2009-03-02 06:00:49 -06:00
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static int
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swap_detect_signature(const char *buf, int *sig)
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2008-11-27 05:32:56 -06:00
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{
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2009-03-02 06:00:49 -06:00
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if (memcmp(buf, "SWAP-SPACE", 10) == 0 ||
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memcmp(buf, "SWAPSPACE2", 10) == 0)
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*sig = SIG_SWAPSPACE;
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else if (memcmp(buf, "S1SUSPEND", 9) == 0 ||
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memcmp(buf, "S2SUSPEND", 9) == 0 ||
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memcmp(buf, "ULSUSPEND", 9) == 0 ||
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memcmp(buf, "\xed\xc3\x02\xe9\x98\x56\xe5\x0c", 8) == 0)
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*sig = SIG_SWSUSPEND;
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else
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return 0;
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2008-11-27 05:32:56 -06:00
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2009-03-02 06:00:49 -06:00
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return 1;
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2008-11-27 05:32:56 -06:00
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}
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|
2009-03-02 06:00:49 -06:00
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static char *
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swap_get_header(int fd, int *sig, unsigned int *pagesize)
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2008-11-27 05:32:56 -06:00
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{
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char *buf;
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2009-03-02 06:00:49 -06:00
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ssize_t datasz;
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unsigned int page;
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2008-11-27 05:32:56 -06:00
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2009-03-02 06:00:49 -06:00
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*pagesize = 0;
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*sig = 0;
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2008-11-27 05:32:56 -06:00
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buf = malloc(MAX_PAGESIZE);
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2009-03-02 06:00:49 -06:00
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if (!buf)
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return NULL;
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2008-11-27 05:32:56 -06:00
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datasz = read(fd, buf, MAX_PAGESIZE);
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2009-03-02 06:00:49 -06:00
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if (datasz == (ssize_t) -1)
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goto err;
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2008-11-27 05:32:56 -06:00
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for (page = 0x1000; page <= MAX_PAGESIZE; page <<= 1) {
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|
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/* skip 32k pagesize since this does not seem to
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* be supported */
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if (page == 0x8000)
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continue;
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/* the smallest swap area is PAGE_SIZE*10, it means
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|
|
* 40k, that's less than MAX_PAGESIZE */
|
2009-03-02 09:41:03 -06:00
|
|
|
if (datasz < (page - SWAP_SIGNATURE_SZ))
|
2008-11-27 05:32:56 -06:00
|
|
|
break;
|
2009-03-02 09:41:03 -06:00
|
|
|
if (swap_detect_signature(buf + page - SWAP_SIGNATURE_SZ, sig)) {
|
2009-03-02 06:00:49 -06:00
|
|
|
*pagesize = page;
|
2008-11-27 05:32:56 -06:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2009-03-02 06:00:49 -06:00
|
|
|
if (*pagesize)
|
|
|
|
return buf;
|
2008-11-27 05:32:56 -06:00
|
|
|
err:
|
2009-03-02 06:00:49 -06:00
|
|
|
free(buf);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* returns real size of swap space */
|
|
|
|
unsigned long long
|
|
|
|
swap_get_size(const char *hdr, const char *devname, unsigned int pagesize)
|
|
|
|
{
|
|
|
|
unsigned int last_page = 0;
|
|
|
|
int swap_version = 0;
|
|
|
|
int flip = 0;
|
|
|
|
struct swap_header_v1_2 *s;
|
|
|
|
|
|
|
|
s = (struct swap_header_v1_2 *) hdr;
|
|
|
|
if (s->version == 1) {
|
|
|
|
swap_version = 1;
|
|
|
|
last_page = s->last_page;
|
|
|
|
} else if (swab32(s->version) == 1) {
|
|
|
|
flip = 1;
|
|
|
|
swap_version = 1;
|
|
|
|
last_page = swab32(s->last_page);
|
|
|
|
}
|
|
|
|
if (verbose)
|
2009-03-02 08:16:21 -06:00
|
|
|
warnx(_("%s: found %sswap v%d signature string"
|
2009-03-02 06:00:49 -06:00
|
|
|
" for %d KiB PAGE_SIZE\n"),
|
|
|
|
devname,
|
|
|
|
flip ? "other-endian " : "",
|
|
|
|
swap_version,
|
|
|
|
pagesize / 1024);
|
|
|
|
|
|
|
|
return (last_page + 1) * pagesize;
|
2008-11-27 05:32:56 -06:00
|
|
|
}
|
|
|
|
|
2006-12-06 17:25:58 -06:00
|
|
|
static int
|
2009-03-02 09:12:26 -06:00
|
|
|
swapon_checks(const char *special)
|
|
|
|
{
|
2006-12-06 17:25:58 -06:00
|
|
|
struct stat st;
|
2009-03-02 09:12:26 -06:00
|
|
|
int fd = -1, sig;
|
|
|
|
char *hdr = NULL;
|
2009-03-02 06:00:49 -06:00
|
|
|
unsigned int pagesize;
|
|
|
|
unsigned long long devsize = 0;
|
2006-12-06 17:25:58 -06:00
|
|
|
|
|
|
|
if (stat(special, &st) < 0) {
|
2009-03-02 08:16:21 -06:00
|
|
|
warn(_("%s: stat failed"), special);
|
2009-03-02 09:12:26 -06:00
|
|
|
goto err;
|
2006-12-06 17:25:58 -06:00
|
|
|
}
|
|
|
|
|
2009-03-02 04:24:03 -06:00
|
|
|
/* people generally dislike this warning - now it is printed
|
|
|
|
only when `verbose' is set */
|
|
|
|
if (verbose) {
|
|
|
|
int permMask = (S_ISBLK(st.st_mode) ? 07007 : 07077);
|
|
|
|
|
2009-03-02 08:16:21 -06:00
|
|
|
if ((st.st_mode & permMask) != 0)
|
|
|
|
warnx(_("%s: insecure permissions %04o, %04o suggested."),
|
|
|
|
special, st.st_mode & 07777,
|
2009-03-02 04:24:03 -06:00
|
|
|
~permMask & 0666);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* test for holes by LBT */
|
|
|
|
if (S_ISREG(st.st_mode)) {
|
|
|
|
if (st.st_blocks * 512 < st.st_size) {
|
2009-03-02 08:16:21 -06:00
|
|
|
warnx(_("%s: skipping - it appears to have holes."),
|
|
|
|
special);
|
2009-03-02 09:12:26 -06:00
|
|
|
goto err;
|
2009-03-02 04:24:03 -06:00
|
|
|
}
|
2009-03-02 06:00:49 -06:00
|
|
|
devsize = st.st_size;
|
|
|
|
}
|
|
|
|
|
|
|
|
fd = open(special, O_RDONLY);
|
|
|
|
if (fd == -1) {
|
2009-03-02 08:16:21 -06:00
|
|
|
warn(_("%s: open failed"), special);
|
2009-03-02 09:12:26 -06:00
|
|
|
goto err;
|
2009-03-02 06:00:49 -06:00
|
|
|
}
|
|
|
|
|
2009-03-02 09:12:26 -06:00
|
|
|
if (S_ISBLK(st.st_mode) && blkdev_get_size(fd, &devsize)) {
|
|
|
|
warn(_("%s: get size failed"), special);
|
|
|
|
goto err;
|
2009-03-02 06:00:49 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
hdr = swap_get_header(fd, &sig, &pagesize);
|
|
|
|
if (!hdr) {
|
2009-03-02 08:16:21 -06:00
|
|
|
warn(_("%s: read swap header failed"), special);
|
2009-03-02 09:12:26 -06:00
|
|
|
goto err;
|
2009-03-02 04:24:03 -06:00
|
|
|
}
|
|
|
|
|
2009-03-02 06:00:49 -06:00
|
|
|
if (sig == SIG_SWAPSPACE && pagesize) {
|
|
|
|
unsigned long long swapsize =
|
|
|
|
swap_get_size(hdr, special, pagesize);
|
2008-11-27 05:32:56 -06:00
|
|
|
if (verbose)
|
2009-03-02 08:16:21 -06:00
|
|
|
warnx("%s: pagesize=%d, swapsize=%llu, devsize=%llu",
|
2009-03-02 06:00:49 -06:00
|
|
|
special, pagesize, swapsize, devsize);
|
|
|
|
|
|
|
|
if (swapsize > devsize) {
|
|
|
|
if (verbose)
|
2009-03-02 08:16:21 -06:00
|
|
|
warnx(_("%s: last_page 0x%08llx is larger"
|
|
|
|
" than actual size of swapspace"),
|
2009-03-02 06:00:49 -06:00
|
|
|
special, swapsize);
|
|
|
|
} else if (getpagesize() != pagesize) {
|
2009-03-03 07:53:27 -06:00
|
|
|
if (fixpgsz) {
|
|
|
|
warn(_("%s: swap format pagesize does not match."),
|
|
|
|
special);
|
|
|
|
if (swap_reinitialize(special) < 0)
|
|
|
|
goto err;
|
|
|
|
} else
|
|
|
|
warn(_("%s: swap format pagesize does not match. "
|
|
|
|
"(may try --fixpgsz to reinitialize)"),
|
|
|
|
special);
|
2009-03-02 06:00:49 -06:00
|
|
|
}
|
|
|
|
} else if (sig == SIG_SWSUSPEND) {
|
|
|
|
/* We have to reinitialize swap with old (=useless) software suspend
|
|
|
|
* data. The problem is that if we don't do it, then we get data
|
|
|
|
* corruption the next time an attempt at unsuspending is made.
|
|
|
|
*/
|
2009-03-02 08:16:21 -06:00
|
|
|
warnx(_("%s: software suspend data detected. "
|
2009-03-02 09:41:03 -06:00
|
|
|
"Rewriting the swap signature."),
|
2009-03-02 08:16:21 -06:00
|
|
|
special);
|
2009-03-02 09:41:03 -06:00
|
|
|
if (swap_rewrite_signature(special, pagesize) < 0)
|
2009-03-02 09:12:26 -06:00
|
|
|
goto err;
|
2008-03-20 03:24:03 -05:00
|
|
|
}
|
|
|
|
|
2009-03-02 09:12:26 -06:00
|
|
|
free(hdr);
|
|
|
|
close(fd);
|
|
|
|
return 0;
|
|
|
|
err:
|
|
|
|
if (fd != -1)
|
|
|
|
close(fd);
|
|
|
|
free(hdr);
|
|
|
|
return -1;
|
|
|
|
}
|
2006-12-06 17:25:58 -06:00
|
|
|
|
2009-03-02 09:12:26 -06:00
|
|
|
static int
|
|
|
|
do_swapon(const char *orig_special, int prio, int canonic) {
|
|
|
|
int status;
|
|
|
|
const char *special = orig_special;
|
|
|
|
int flags = 0;
|
2006-12-06 17:25:58 -06:00
|
|
|
|
2009-03-02 09:12:26 -06:00
|
|
|
if (verbose)
|
|
|
|
printf(_("%s on %s\n"), progname, orig_special);
|
|
|
|
|
|
|
|
if (!canonic) {
|
|
|
|
special = fsprobe_get_devname_by_spec(orig_special);
|
|
|
|
if (!special)
|
|
|
|
return cannot_find(orig_special);
|
2006-12-06 17:25:58 -06:00
|
|
|
}
|
2007-06-13 04:52:55 -05:00
|
|
|
|
2009-03-02 09:12:26 -06:00
|
|
|
if (swapon_checks(special))
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
#ifdef SWAP_FLAG_PREFER
|
|
|
|
if (prio >= 0) {
|
|
|
|
if (prio > SWAP_FLAG_PRIO_MASK)
|
|
|
|
prio = SWAP_FLAG_PRIO_MASK;
|
|
|
|
flags = SWAP_FLAG_PREFER
|
|
|
|
| ((prio & SWAP_FLAG_PRIO_MASK)
|
|
|
|
<< SWAP_FLAG_PRIO_SHIFT);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
status = swapon(special, flags);
|
2009-03-02 08:16:21 -06:00
|
|
|
if (status < 0)
|
|
|
|
warn(_("%s: swapon failed"), orig_special);
|
2006-12-06 17:25:58 -06:00
|
|
|
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2006-12-06 17:26:31 -06:00
|
|
|
cannot_find(const char *special) {
|
2009-03-02 08:16:21 -06:00
|
|
|
warnx(_("cannot find the device for %s"), special);
|
2006-12-06 17:26:31 -06:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
swapon_by_label(const char *label, int prio) {
|
2007-05-10 04:21:35 -05:00
|
|
|
const char *special = fsprobe_get_devname_by_label(label);
|
2007-08-07 05:03:53 -05:00
|
|
|
return special ? do_swapon(special, prio, CANONIC) : cannot_find(label);
|
2006-12-06 17:26:31 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
swapon_by_uuid(const char *uuid, int prio) {
|
2007-05-10 04:21:35 -05:00
|
|
|
const char *special = fsprobe_get_devname_by_uuid(uuid);
|
2007-08-07 05:03:53 -05:00
|
|
|
return special ? do_swapon(special, prio, CANONIC) : cannot_find(uuid);
|
2006-12-06 17:26:31 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2007-08-07 05:03:53 -05:00
|
|
|
do_swapoff(const char *orig_special, int quiet, int canonic) {
|
|
|
|
const char *special = orig_special;
|
2006-12-06 17:26:31 -06:00
|
|
|
|
2006-12-06 17:25:58 -06:00
|
|
|
if (verbose)
|
2006-12-06 17:26:31 -06:00
|
|
|
printf(_("%s on %s\n"), progname, orig_special);
|
|
|
|
|
2007-08-07 05:03:53 -05:00
|
|
|
if (!canonic) {
|
2009-03-02 07:21:03 -06:00
|
|
|
special = fsprobe_get_devname_by_spec(orig_special);
|
2007-08-07 05:03:53 -05:00
|
|
|
if (!special)
|
|
|
|
return cannot_find(orig_special);
|
|
|
|
}
|
2006-12-06 17:25:58 -06:00
|
|
|
|
|
|
|
if (swapoff(special) == 0)
|
|
|
|
return 0; /* success */
|
|
|
|
|
2009-03-02 08:16:21 -06:00
|
|
|
if (errno == EPERM)
|
|
|
|
errx(EXIT_FAILURE, _("Not superuser."));
|
|
|
|
|
|
|
|
if (!quiet || errno == ENOMEM)
|
|
|
|
warn(_("%s: swapoff failed"), orig_special);
|
2006-12-06 17:25:58 -06:00
|
|
|
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2006-12-06 17:26:31 -06:00
|
|
|
swapoff_by_label(const char *label, int quiet) {
|
2007-05-10 04:21:35 -05:00
|
|
|
const char *special = fsprobe_get_devname_by_label(label);
|
2007-08-07 05:03:53 -05:00
|
|
|
return special ? do_swapoff(special, quiet, CANONIC) : cannot_find(label);
|
2006-12-06 17:26:31 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
swapoff_by_uuid(const char *uuid, int quiet) {
|
2007-05-10 04:21:35 -05:00
|
|
|
const char *special = fsprobe_get_devname_by_uuid(uuid);
|
2007-08-07 05:03:53 -05:00
|
|
|
return special ? do_swapoff(special, quiet, CANONIC) : cannot_find(uuid);
|
2006-12-06 17:26:31 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
swapon_all(void) {
|
2006-12-06 17:25:58 -06:00
|
|
|
FILE *fp;
|
|
|
|
struct mntent *fstab;
|
|
|
|
int status = 0;
|
|
|
|
|
2006-12-06 17:26:31 -06:00
|
|
|
read_proc_swaps();
|
|
|
|
|
2007-11-28 07:35:24 -06:00
|
|
|
fp = setmntent(_PATH_MNTTAB, "r");
|
2009-03-02 08:16:21 -06:00
|
|
|
if (fp == NULL)
|
|
|
|
err(2, _("%s: open failed"), _PATH_MNTTAB);
|
2006-12-06 17:26:31 -06:00
|
|
|
|
|
|
|
while ((fstab = getmntent(fp)) != NULL) {
|
|
|
|
const char *special;
|
|
|
|
int skip = 0;
|
|
|
|
int pri = priority;
|
2008-08-18 18:14:14 -05:00
|
|
|
char *opt, *opts;
|
2006-12-06 17:26:31 -06:00
|
|
|
|
|
|
|
if (!streq(fstab->mnt_type, MNTTYPE_SWAP))
|
|
|
|
continue;
|
|
|
|
|
2008-08-18 18:14:14 -05:00
|
|
|
opts = strdup(fstab->mnt_opts);
|
|
|
|
|
|
|
|
for (opt = strtok(opts, ","); opt != NULL;
|
|
|
|
opt = strtok(NULL, ",")) {
|
|
|
|
if (strncmp(opt, "pri=", 4) == 0)
|
|
|
|
pri = atoi(opt+4);
|
|
|
|
if (strcmp(opt, "noauto") == 0)
|
|
|
|
skip = 1;
|
|
|
|
}
|
|
|
|
free(opts);
|
|
|
|
|
|
|
|
if (skip)
|
|
|
|
continue;
|
|
|
|
|
2009-03-02 07:21:03 -06:00
|
|
|
special = fsprobe_get_devname_by_spec(fstab->mnt_fsname);
|
2008-08-18 18:14:14 -05:00
|
|
|
if (!special) {
|
|
|
|
if (!ifexists)
|
|
|
|
status |= cannot_find(fstab->mnt_fsname);
|
2006-12-06 17:26:31 -06:00
|
|
|
continue;
|
2008-08-18 18:14:14 -05:00
|
|
|
}
|
2006-12-06 17:26:31 -06:00
|
|
|
|
|
|
|
if (!is_in_proc_swaps(special) &&
|
2008-08-18 18:14:14 -05:00
|
|
|
(!ifexists || !access(special, R_OK)))
|
|
|
|
status |= do_swapon(special, pri, CANONIC);
|
|
|
|
|
|
|
|
free((void *) special);
|
2006-12-06 17:26:31 -06:00
|
|
|
}
|
|
|
|
fclose(fp);
|
|
|
|
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const char **llist = NULL;
|
|
|
|
static int llct = 0;
|
|
|
|
static const char **ulist = NULL;
|
|
|
|
static int ulct = 0;
|
|
|
|
|
|
|
|
static void addl(const char *label) {
|
2009-03-02 07:21:03 -06:00
|
|
|
llist = (const char **) realloc(llist, (++llct) * sizeof(char *));
|
|
|
|
if (!llist)
|
|
|
|
exit(EXIT_FAILURE);
|
2006-12-06 17:26:31 -06:00
|
|
|
llist[llct-1] = label;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void addu(const char *uuid) {
|
2009-03-02 07:21:03 -06:00
|
|
|
ulist = (const char **) realloc(ulist, (++ulct) * sizeof(char *));
|
|
|
|
if (!ulist)
|
|
|
|
exit(EXIT_FAILURE);
|
2006-12-06 17:26:31 -06:00
|
|
|
ulist[ulct-1] = uuid;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
main_swapon(int argc, char *argv[]) {
|
|
|
|
int status = 0;
|
|
|
|
int c, i;
|
|
|
|
|
2009-03-03 07:53:27 -06:00
|
|
|
while ((c = getopt_long(argc, argv, "ahefp:svVL:U:",
|
2006-12-06 17:26:31 -06:00
|
|
|
longswaponopts, NULL)) != -1) {
|
2006-12-06 17:25:58 -06:00
|
|
|
switch (c) {
|
|
|
|
case 'a': /* all */
|
|
|
|
++all;
|
|
|
|
break;
|
|
|
|
case 'h': /* help */
|
|
|
|
swapon_usage(stdout, 0);
|
|
|
|
break;
|
|
|
|
case 'p': /* priority */
|
|
|
|
priority = atoi(optarg);
|
|
|
|
break;
|
2006-12-06 17:26:31 -06:00
|
|
|
case 'L':
|
|
|
|
addl(optarg);
|
|
|
|
break;
|
|
|
|
case 'U':
|
|
|
|
addu(optarg);
|
|
|
|
break;
|
2006-12-06 17:26:05 -06:00
|
|
|
case 'e': /* ifexists */
|
|
|
|
ifexists = 1;
|
|
|
|
break;
|
2009-03-03 07:53:27 -06:00
|
|
|
case 'f':
|
|
|
|
fixpgsz = 1;
|
|
|
|
break;
|
2006-12-06 17:25:58 -06:00
|
|
|
case 's': /* status report */
|
|
|
|
status = display_summary();
|
|
|
|
exit(status);
|
|
|
|
case 'v': /* be chatty */
|
|
|
|
++verbose;
|
|
|
|
break;
|
|
|
|
case 'V': /* version */
|
2006-12-06 17:26:58 -06:00
|
|
|
printf("%s: (%s)\n", progname, PACKAGE_STRING);
|
2006-12-06 17:25:58 -06:00
|
|
|
exit(0);
|
|
|
|
case 0:
|
|
|
|
break;
|
|
|
|
case '?':
|
|
|
|
default:
|
|
|
|
swapon_usage(stderr, 1);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
argv += optind;
|
|
|
|
|
2006-12-06 17:26:31 -06:00
|
|
|
if (!all && !llct && !ulct && *argv == NULL)
|
2006-12-06 17:25:58 -06:00
|
|
|
swapon_usage(stderr, 2);
|
|
|
|
|
2006-12-06 17:26:31 -06:00
|
|
|
if (ifexists && (!all || strcmp(progname, "swapon")))
|
|
|
|
swapon_usage(stderr, 1);
|
2006-12-06 17:26:05 -06:00
|
|
|
|
2006-12-06 17:26:31 -06:00
|
|
|
if (all)
|
|
|
|
status |= swapon_all();
|
2006-12-06 17:25:58 -06:00
|
|
|
|
2006-12-06 17:26:31 -06:00
|
|
|
for (i = 0; i < llct; i++)
|
|
|
|
status |= swapon_by_label(llist[i], priority);
|
2006-12-06 17:25:58 -06:00
|
|
|
|
2006-12-06 17:26:31 -06:00
|
|
|
for (i = 0; i < ulct; i++)
|
|
|
|
status |= swapon_by_uuid(ulist[i], priority);
|
2006-12-06 17:25:58 -06:00
|
|
|
|
|
|
|
while (*argv != NULL)
|
2007-08-07 05:03:53 -05:00
|
|
|
status |= do_swapon(*argv++, priority, !CANONIC);
|
2006-12-06 17:25:58 -06:00
|
|
|
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
main_swapoff(int argc, char *argv[]) {
|
|
|
|
FILE *fp;
|
|
|
|
struct mntent *fstab;
|
|
|
|
int status = 0;
|
|
|
|
int c, i;
|
|
|
|
|
2006-12-06 17:26:31 -06:00
|
|
|
while ((c = getopt_long(argc, argv, "ahvVL:U:",
|
2006-12-06 17:25:58 -06:00
|
|
|
longswapoffopts, NULL)) != -1) {
|
|
|
|
switch (c) {
|
|
|
|
case 'a': /* all */
|
|
|
|
++all;
|
|
|
|
break;
|
|
|
|
case 'h': /* help */
|
|
|
|
swapoff_usage(stdout, 0);
|
|
|
|
break;
|
|
|
|
case 'v': /* be chatty */
|
|
|
|
++verbose;
|
|
|
|
break;
|
|
|
|
case 'V': /* version */
|
2006-12-06 17:26:58 -06:00
|
|
|
printf("%s (%s)\n", progname, PACKAGE_STRING);
|
2006-12-06 17:25:58 -06:00
|
|
|
exit(0);
|
2006-12-06 17:26:31 -06:00
|
|
|
case 'L':
|
|
|
|
addl(optarg);
|
|
|
|
break;
|
|
|
|
case 'U':
|
|
|
|
addu(optarg);
|
|
|
|
break;
|
2006-12-06 17:25:58 -06:00
|
|
|
case 0:
|
|
|
|
break;
|
|
|
|
case '?':
|
|
|
|
default:
|
|
|
|
swapoff_usage(stderr, 1);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
argv += optind;
|
|
|
|
|
2006-12-06 17:26:31 -06:00
|
|
|
if (!all && !llct && !ulct && *argv == NULL)
|
2006-12-06 17:25:58 -06:00
|
|
|
swapoff_usage(stderr, 2);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* swapoff any explicitly given arguments.
|
|
|
|
* Complain in case the swapoff call fails.
|
|
|
|
*/
|
2006-12-06 17:26:31 -06:00
|
|
|
for (i = 0; i < llct; i++)
|
|
|
|
status |= swapoff_by_label(llist[i], !QUIET);
|
|
|
|
|
|
|
|
for (i = 0; i < ulct; i++)
|
|
|
|
status |= swapoff_by_uuid(ulist[i], !QUIET);
|
|
|
|
|
2006-12-06 17:25:58 -06:00
|
|
|
while (*argv != NULL)
|
2007-08-07 05:03:53 -05:00
|
|
|
status |= do_swapoff(*argv++, !QUIET, !CANONIC);
|
2006-12-06 17:25:58 -06:00
|
|
|
|
|
|
|
if (all) {
|
|
|
|
/*
|
2006-12-06 17:26:30 -06:00
|
|
|
* In case /proc/swaps exists, unswap stuff listed there.
|
2006-12-06 17:25:58 -06:00
|
|
|
* We are quiet but report errors in status.
|
|
|
|
* Errors might mean that /proc/swaps
|
|
|
|
* exists as ordinary file, not in procfs.
|
|
|
|
* do_swapoff() exits immediately on EPERM.
|
|
|
|
*/
|
|
|
|
read_proc_swaps();
|
|
|
|
for(i=0; i<numSwaps; i++)
|
2007-08-07 05:03:53 -05:00
|
|
|
status |= do_swapoff(swapFiles[i], QUIET, CANONIC);
|
2006-12-06 17:25:58 -06:00
|
|
|
|
|
|
|
/*
|
2006-12-06 17:26:30 -06:00
|
|
|
* Unswap stuff mentioned in /etc/fstab.
|
2006-12-06 17:25:58 -06:00
|
|
|
* Probably it was unmounted already, so errors are not bad.
|
|
|
|
* Doing swapoff -a twice should not give error messages.
|
|
|
|
*/
|
2007-11-28 07:35:24 -06:00
|
|
|
fp = setmntent(_PATH_MNTTAB, "r");
|
2009-03-02 08:16:21 -06:00
|
|
|
if (fp == NULL)
|
|
|
|
err(2, _("%s: open failed"), _PATH_MNTTAB);
|
|
|
|
|
2006-12-06 17:25:58 -06:00
|
|
|
while ((fstab = getmntent(fp)) != NULL) {
|
2007-08-04 19:04:11 -05:00
|
|
|
const char *special;
|
|
|
|
|
|
|
|
if (!streq(fstab->mnt_type, MNTTYPE_SWAP))
|
|
|
|
continue;
|
|
|
|
|
2009-03-02 07:21:03 -06:00
|
|
|
special = fsprobe_get_devname_by_spec(fstab->mnt_fsname);
|
2007-08-04 19:04:11 -05:00
|
|
|
if (!special)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
if (!is_in_proc_swaps(special))
|
2007-08-07 05:03:53 -05:00
|
|
|
do_swapoff(special, QUIET, CANONIC);
|
2006-12-06 17:25:58 -06:00
|
|
|
}
|
2006-12-06 17:26:16 -06:00
|
|
|
fclose(fp);
|
2006-12-06 17:25:58 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
main(int argc, char *argv[]) {
|
|
|
|
|
|
|
|
setlocale(LC_ALL, "");
|
|
|
|
bindtextdomain(PACKAGE, LOCALEDIR);
|
|
|
|
textdomain(PACKAGE);
|
|
|
|
|
2009-03-02 08:16:21 -06:00
|
|
|
progname = program_invocation_short_name;
|
|
|
|
if (!progname) {
|
|
|
|
char *p = strrchr(argv[0], '/');
|
|
|
|
progname = p ? p+1 : argv[0];
|
|
|
|
}
|
2006-12-06 17:25:58 -06:00
|
|
|
|
2006-12-06 17:26:31 -06:00
|
|
|
if (streq(progname, "swapon"))
|
2006-12-06 17:25:58 -06:00
|
|
|
return main_swapon(argc, argv);
|
|
|
|
else
|
|
|
|
return main_swapoff(argc, argv);
|
2006-12-06 17:25:32 -06:00
|
|
|
}
|