fd-util: introduce a simple helper to check a file descriptor has O_PATH

2 files changed, 13 insertions, 0 deletions

diff --git a/src/basic/fd-util.c b/src/basic/fd-util.c
index 4d6d01cd99..430db0c879 100644
--- a/src/basic/fd-util.c
+++ b/src/basic/fd-util.c
@@ -808,6 +808,18 @@ int fd_reopen_condition(
         return new_fd;
 }
 
+int fd_is_opath(int fd) {
+        int r;
+
+        assert(fd >= 0);
+
+        r = fcntl(fd, F_GETFL);
+        if (r < 0)
+                return -errno;
+
+        return FLAGS_SET(r, O_PATH);
+}
+
 int read_nr_open(void) {
         _cleanup_free_ char *nr_open = NULL;
         int r;
diff --git a/src/basic/fd-util.h b/src/basic/fd-util.h
index 952afdd64f..f5357860f5 100644
--- a/src/basic/fd-util.h
+++ b/src/basic/fd-util.h
@@ -104,6 +104,7 @@ static inline int make_null_stdio(void) {
 
 int fd_reopen(int fd, int flags);
 int fd_reopen_condition(int fd, int flags, int mask, int *ret_new_fd);
+int fd_is_opath(int fd);
 int read_nr_open(void);
 int fd_get_diskseq(int fd, uint64_t *ret);