/*
* 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 const char swapoff_usage[] =
- "swapoff [OPTION] [device]\n\n"
- "Stop swapping virtual memory pages on the given device.\n\n"
- "Options:\n"
- "\t-a\tStop swapping on all swap devices\n";
-
-static const char swapon_usage[] =
- "swapon [OPTION] [device]\n\n"
- "Start swapping virtual memory pages on the given device.\n\n"
- "Options:\n"
- "\t-a\tStart swapping on all swap devices\n";
-
+static int whichApp; /* default SWAPON_APP */
-#define SWAPON_APP 1
-#define SWAPOFF_APP 2
+static const int SWAPON_APP = 0;
+static const int SWAPOFF_APP = 1;
-static void swap_enable_disable(char *device)
+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);
+ }
+
+ /* 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);
status = swapoff(device);
if (status != 0) {
- perror(appName);
- exit(FALSE);
+ 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");
+ int err = 0;
- if (f == NULL) {
- perror("/etc/fstab");
- exit(FALSE);
- }
+ if (f == NULL)
+ bb_perror_msg_and_die("/etc/fstab");
while ((m = getmntent(f)) != NULL) {
- if (!strstr(m->mnt_type, MNTTYPE_SWAP)) {
- swap_enable_disable(m->mnt_fsname);
+ if (strcmp(m->mnt_type, MNTTYPE_SWAP)==0) {
+ if(swap_enable_disable(m->mnt_fsname) == EXIT_FAILURE)
+ err++;
}
}
endmntent(f);
- exit(TRUE);
+ return err;
}
extern int swap_on_off_main(int argc, char **argv)
{
- if (strcmp(*argv, "swapon") == 0) {
- appName = *argv;
- whichApp = SWAPON_APP;
-
- } else {
- appName = *argv;
+ if (bb_applet_name[5] == 'f') { /* "swapoff" */
whichApp = SWAPOFF_APP;
}
struct stat statBuf;
if (stat("/etc/fstab", &statBuf) < 0)
- fatalError("/etc/fstab file missing\n");
+ bb_error_msg_and_die("/etc/fstab file missing");
}
- do_em_all();
+ return do_em_all();
break;
default:
goto usage_and_exit;
}
}
- swap_enable_disable(*argv);
- exit(TRUE);
+ return swap_enable_disable(*argv);
usage_and_exit:
- usage((whichApp == SWAPON_APP) ? swapon_usage : swapoff_usage);
- exit(FALSE);
+ bb_show_usage();
}