fsck: look for fsck binary not just in /sbin

This removes remaining hardcoded occurences of `/sbin/fsck`, and instead
uses `find_executable` to find `fsck`.

We also use `fsck_exists_for_fstype` to check for the `fsck.*`
executable, which also checks in `$PATH`, so it's fair to assume fsck
itself is also available.

1 files changed, 8 insertions, 1 deletions

diff --git a/src/fsck/fsck.c b/src/fsck/fsck.c
index cfdc6b24bf..4d29babbd3 100644
--- a/src/fsck/fsck.c
+++ b/src/fsck/fsck.c
@@ -345,6 +345,7 @@ static int run(int argc, char *argv[]) {
         if (r == 0) {
                 char dash_c[STRLEN("-C") + DECIMAL_STR_MAX(int) + 1];
                 int progress_socket = -1;
+                _cleanup_free_ char *fsck_path = NULL;
                 const char *cmdline[9];
                 int i = 0;
 
@@ -365,7 +366,13 @@ static int run(int argc, char *argv[]) {
                 } else
                         dash_c[0] = 0;
 
-                cmdline[i++] = "/sbin/fsck";
+                r = find_executable("fsck", &fsck_path);
+                if (r < 0) {
+                        log_error_errno(r, "Cannot find fsck binary: %m");
+                        _exit(FSCK_OPERATIONAL_ERROR);
+                }
+
+                cmdline[i++] = fsck_path;
                 cmdline[i++] =  arg_repair;
                 cmdline[i++] = "-T";