svn add match_fstype.c :(

libbb/match_fstype.c

@@ -0,0 +1,44 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Match fstypes for use in mount unmount
+ * We accept notmpfs,nfs but not notmpfs,nonfs
+ * This allows us to match fstypes that start with no like so
+ *   mount -at ,noddy
+ *
+ * Returns 0 for a match, otherwise -1
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+#include "libbb.h"
+
+int match_fstype(const struct mntent *mt, const char *fstype)
+{
+	int no = 0;
+	int len;
+
+	if (!mt)
+		return -1;
+		  
+	if (!fstype)
+		return 0;
+
+	if (fstype[0] == 'n' && fstype[1] == 'o') {
+		no = -1;
+		fstype += 2;
+	}
+
+	len = strlen(mt->mnt_type);
+	while (fstype) {
+		if (!strncmp(mt->mnt_type, fstype, len)
+		 && (!fstype[len] || fstype[len] == ',')
+		) {
+			return no;
+		}
+		fstype = strchr(fstype, ',');
+		if (fstype)
+			fstype++;
+	}
+
+	return -(no + 1);
+}