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-rw-r--r--libbb/match_fstype.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/libbb/match_fstype.c b/libbb/match_fstype.c
new file mode 100644
index 000000000..7698ceb08
--- /dev/null
+++ b/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);
+}