swapon: move generic code to swapon-common.c

This will allow to use separate binary for swapon and swapoff.

Signed-off-by: Karel Zak <kzak@redhat.com>

1 files changed, 106 insertions, 0 deletions

diff --git a/sys-utils/swapon-common.c b/sys-utils/swapon-common.c
new file mode 100644
index 000000000..d5b7cef61
--- /dev/null
+++ b/sys-utils/swapon-common.c
@@ -0,0 +1,106 @@
+
+#include "c.h"
+#include "nls.h"
+#include "swapon-common.h"
+#include "xalloc.h"
+
+/*
+ * content of /proc/swaps and /etc/fstab
+ */
+static struct libmnt_table *swaps, *fstab;
+
+struct libmnt_cache *mntcache;
+
+struct libmnt_table *get_fstab(void)
+{
+	if (!fstab) {
+		fstab = mnt_new_table();
+		if (!fstab)
+			return NULL;
+		mnt_table_set_cache(fstab, mntcache);
+		if (mnt_table_parse_fstab(fstab, NULL) != 0)
+			return NULL;
+	}
+
+	return fstab;
+}
+
+struct libmnt_table *get_swaps(void)
+{
+	if (!swaps) {
+		swaps = mnt_new_table();
+		if (!swaps)
+			return NULL;
+		mnt_table_set_cache(swaps, mntcache);
+		if (mnt_table_parse_swaps(swaps, NULL) != 0)
+			return NULL;
+	}
+
+	return swaps;
+}
+
+void free_tables(void)
+{
+	mnt_free_table(swaps);
+	mnt_free_table(fstab);
+}
+
+int match_swap(struct libmnt_fs *fs, void *data __attribute__((unused)))
+{
+	return fs && mnt_fs_is_swaparea(fs);
+}
+
+int is_active_swap(const char *filename)
+{
+	struct libmnt_table *st = get_swaps();
+	return st && mnt_table_find_srcpath(st, filename, MNT_ITER_BACKWARD);
+}
+
+
+int cannot_find(const char *special)
+{
+	warnx(_("cannot find the device for %s"), special);
+	return -1;
+}
+
+/*
+ * Lists with -L and -U option
+ */
+static const char **llist;
+static size_t llct;
+static const char **ulist;
+static size_t ulct;
+
+
+void add_label(const char *label)
+{
+	llist = (const char **) xrealloc(llist, (++llct) * sizeof(char *));
+	llist[llct - 1] = label;
+}
+
+const char *get_label(size_t i)
+{
+	return i < llct ? llist[i] : NULL;
+}
+
+size_t numof_labels(void)
+{
+	return llct;
+}
+
+void add_uuid(const char *uuid)
+{
+	ulist = (const char **) xrealloc(ulist, (++ulct) * sizeof(char *));
+	ulist[ulct - 1] = uuid;
+}
+
+const char *get_uuid(size_t i)
+{
+	return i < ulct ? ulist[i] : NULL;
+}
+
+size_t numof_uuids(void)
+{
+	return ulct;
+}
+