1 files changed, 121 insertions, 0 deletions

diff --git a/swaponoff.c b/swaponoff.c
new file mode 100644
index 000000000..56f93b393
--- /dev/null
+++ b/swaponoff.c
@@ -0,0 +1,121 @@
+/*
+ * Mini swapon/swapoff implementation for busybox
+ *
+ * Copyright (C) 1998 by Erik Andersen <andersee@debian.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
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#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>
+
+
+static int whichApp;
+static const char* appName;
+
+static const char swapoff_usage[] = 
+"Usage: swapoff device\n"
+"\nStop swapping virtual memory pages on the given device.\n";
+static const char swapon_usage[] = 
+"Usage: swapon device\n"
+"\nStart swapping virtual memory pages on the given device.\n";
+
+
+#define SWAPON_APP   1
+#define SWAPOFF_APP  2
+
+
+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);
+    }
+}
+
+static void
+do_em_all()
+{
+        struct mntent *m;
+        char swapName[NAME_MAX];
+        FILE *f = setmntent ("/etc/fstab", "r");
+
+        if (f == NULL) {
+            perror("/etc/fstab");
+            exit( FALSE); 
+        }
+        while ((m = getmntent (f)) != NULL) {
+            if (!strstr (m->mnt_type, "swap")) {
+                    swap_enable_disable( swapName);
+            }
+        }
+        endmntent (f);
+        exit( TRUE);
+}
+
+
+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:
+                goto usage_and_exit;
+        }
+    }
+    swap_enable_disable(*argv);
+    //exit( TRUE);
+
+usage_and_exit:
+    fprintf(stderr, "Usage: %s", (whichApp==SWAPON_APP)? swapon_usage : swapoff_usage);
+    exit(FALSE);
+}
+