mirror of
https://github.com/sheumann/hush.git
synced 2024-11-05 06:07:00 +00:00
d2844fcb68
Signed-off-by: Lauri Kasanen <curaga@operamail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
119 lines
2.2 KiB
C
119 lines
2.2 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Mini swapon/swapoff implementation for busybox
|
|
*
|
|
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
|
|
*
|
|
* Licensed under the GPL version 2, see the file LICENSE in this tarball.
|
|
*/
|
|
|
|
#include "libbb.h"
|
|
#include <mntent.h>
|
|
#include <sys/swap.h>
|
|
|
|
#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;
|
|
|
|
resolve_mount_spec(&device);
|
|
xstat(device, &st);
|
|
|
|
#if ENABLE_DESKTOP
|
|
/* test for holes */
|
|
if (S_ISREG(st.st_mode))
|
|
if (st.st_blocks * (off_t)512 < st.st_size)
|
|
bb_error_msg("warning: swap file has holes");
|
|
#endif
|
|
|
|
if (applet_name[5] == 'n')
|
|
status = swapon(device, g_flags);
|
|
else
|
|
status = swapoff(device);
|
|
|
|
if (status != 0) {
|
|
bb_simple_perror_msg(device);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int do_em_all(void)
|
|
{
|
|
struct mntent *m;
|
|
FILE *f;
|
|
int err;
|
|
|
|
f = setmntent("/etc/fstab", "r");
|
|
if (f == NULL)
|
|
bb_perror_msg_and_die("/etc/fstab");
|
|
|
|
err = 0;
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (ENABLE_FEATURE_CLEAN_UP)
|
|
endmntent(f);
|
|
|
|
return err;
|
|
}
|
|
|
|
int swap_on_off_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int swap_on_off_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
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 (ret /* & 1: not needed */) // -a
|
|
return do_em_all();
|
|
|
|
argv += optind;
|
|
if (!*argv)
|
|
bb_show_usage();
|
|
|
|
/* ret = 0; redundant */
|
|
do {
|
|
ret += swap_enable_disable(*argv);
|
|
} while (*++argv);
|
|
|
|
return ret;
|
|
}
|