fsck: Search for fsck.type in PATH

Modifies find_binary() to accept NULL in the second argument.

fsck.type lookup logic moved to new fsck_exists() function, with a test.

1 files changed, 11 insertions, 0 deletions

diff --git a/src/test/test-path-util.c b/src/test/test-path-util.c
index bec2a83611..a2cf0af75f 100644
--- a/src/test/test-path-util.c
+++ b/src/test/test-path-util.c
@@ -158,9 +158,20 @@ static void test_prefixes(void) {
         }
 }
 
+static void test_fsck_exists(void) {
+        /* Ensure we use a sane default for PATH. */
+        unsetenv("PATH");
+
+        /* fsck.minix is provided by util-linux and will probably exist. */
+        assert_se(fsck_exists("minix") == 0);
+
+        assert_se(fsck_exists("AbCdE") == -ENOENT);
+}
+
 int main(void) {
         test_path();
         test_find_binary();
         test_prefixes();
+        test_fsck_exists();
         return 0;
 }