+/* vi: set sw=4 ts=4: */
/*
* Mini swapon/swapoff implementation for busybox
*
- *
- * Copyright (C) 1999 by Lineo, inc.
- * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
* 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
*
*/
-#include "internal.h"
#include <stdio.h>
-#include <sys/mount.h>
-#include <sys/swap.h>
#include <mntent.h>
#include <dirent.h>
-#include <fstab.h>
#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/mount.h>
+#include <sys/swap.h>
+#include "busybox.h"
-static int whichApp;
-static const char* appName;
+static int whichApp; /* default SWAPON_APP */
-static const char swapoff_usage[] =
-"swapoff device\n"
-"\nStop swapping virtual memory pages on the given device.\n";
-static const char swapon_usage[] =
-"swapon device\n"
-"\nStart swapping virtual memory pages on the given device.\n";
+static const int SWAPON_APP = 0;
+static const int SWAPOFF_APP = 1;
-#define SWAPON_APP 1
-#define SWAPOFF_APP 2
+static int swap_enable_disable(const char *device)
+{
+ int status;
+ struct stat st;
+ if (stat(device, &st) < 0) {
+ bb_perror_msg_and_die("cannot stat %s", device);
+ }
-static void
-swap_enable_disable( char *device)
-{
- int status;
- if ( whichApp == SWAPON_APP )
- status = swapon(device, 0);
- else
- status = swapoff(device);
-
- if ( status != 0 ) {
- perror(appName);
- exit( FALSE);
- }
+ /* 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 (whichApp == SWAPON_APP)
+ status = swapon(device, 0);
+ else
+ status = swapoff(device);
+
+ if (status != 0) {
+ bb_perror_msg("%s", device);
+ return EXIT_FAILURE;
+ }
+ return EXIT_SUCCESS;
}
-static void
-do_em_all()
+static int do_em_all(void)
{
struct mntent *m;
- FILE *f = setmntent ("/etc/fstab", "r");
-
- if (f == NULL) {
- perror("/etc/fstab");
- exit( FALSE);
- }
- while ((m = getmntent (f)) != NULL) {
- if (!strstr (m->mnt_type, MNTTYPE_SWAP)) {
- swap_enable_disable( m->mnt_fsname);
- }
+ FILE *f = setmntent("/etc/fstab", "r");
+ int err = 0;
+
+ if (f == NULL)
+ bb_perror_msg_and_die("/etc/fstab");
+ while ((m = getmntent(f)) != NULL) {
+ if (strcmp(m->mnt_type, MNTTYPE_SWAP)==0) {
+ if(swap_enable_disable(m->mnt_fsname) == EXIT_FAILURE)
+ err++;
+ }
}
- endmntent (f);
- exit( TRUE);
+ endmntent(f);
+ return err;
}
-extern int
-swap_on_off_main(int argc, char * * argv)
+extern int swap_on_off_main(int argc, char **argv)
{
- struct stat statBuf;
- if (stat("/etc/fstab", &statBuf) < 0)
- fprintf(stderr, "/etc/fstab file missing -- Please install one.\n\n");
-
- if (strcmp(*argv, "swapon")==0) {
- appName = *argv;
- whichApp = SWAPON_APP;
-
- } else {
- appName = *argv;
- whichApp = SWAPOFF_APP;
- }
-
- if (argc < 2)
- goto usage_and_exit;
- argc--;
- argv++;
-
- /* Parse any options */
- while (**argv == '-') {
- while (*++(*argv)) switch (**argv) {
- case 'a':
- do_em_all();
- break;
- default:
+ if (bb_applet_name[5] == 'f') { /* "swapoff" */
+ whichApp = SWAPOFF_APP;
+ }
+
+ if (argc != 2) {
goto usage_and_exit;
}
- }
- swap_enable_disable(*argv);
- exit( TRUE);
+ argc--;
+ argv++;
+
+ /* Parse any options */
+ while (**argv == '-') {
+ while (*++(*argv))
+ switch (**argv) {
+ case 'a':
+ {
+ struct stat statBuf;
+
+ if (stat("/etc/fstab", &statBuf) < 0)
+ bb_error_msg_and_die("/etc/fstab file missing");
+ }
+ return do_em_all();
+ break;
+ default:
+ goto usage_and_exit;
+ }
+ }
+ return swap_enable_disable(*argv);
-usage_and_exit:
- usage( (whichApp==SWAPON_APP)? swapon_usage : swapoff_usage);
- exit( FALSE);
+ usage_and_exit:
+ bb_show_usage();
}
-