1 files changed, 120 insertions, 0 deletions
diff --git a/busybox/util-linux/swaponoff.c b/busybox/util-linux/swaponoff.c
new file mode 100644
index 0000000..7c7031b
--- /dev/null
+++ b/busybox/util-linux/swaponoff.c
@@ -0,0 +1,120 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini swapon/swapoff implementation for busybox
+ *
+ * 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
+ * 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 <stdio.h>
+#include <mntent.h>
+#include <dirent.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/mount.h>
+#include <sys/swap.h>
+
+#include "busybox.h"
+
+static int whichApp;    /* default SWAPON_APP */
+
+static const int SWAPON_APP = 0;
+static const int SWAPOFF_APP = 1;
+
+
+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);
+	else
+		status = swapoff(device);
+
+	if (status != 0) {
+		bb_perror_msg("%s", device);
+		return EXIT_FAILURE;
+	}
+	return EXIT_SUCCESS;
+}
+
+static int do_em_all(void)
+{
+	struct mntent *m;
+	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);
+	return err;
+}
+
+
+extern int swap_on_off_main(int argc, char **argv)
+{
+	if (bb_applet_name[5] == 'f') { /* "swapoff" */
+		whichApp = SWAPOFF_APP;
+	}
+
+	if (argc != 2) {
+		goto usage_and_exit;
+	}
+	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:
+	bb_show_usage();
+}