Add fopenat utility function

Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>

1 files changed, 7 insertions, 0 deletions

diff --git a/lib/include/util.h b/lib/include/util.h
index 925a1f0..f300329 100644
--- a/lib/include/util.h
+++ b/lib/include/util.h
@@ -21,6 +21,7 @@
 #include <sys/types.h>
 #include <stdbool.h>
 #include <stddef.h>
+#include <stdio.h>
 
 #include "config.h"
 
@@ -83,5 +84,11 @@ int setup_tty(const char *tty, bool truncate);
 
 NORETURN void argv_exec(exec_t *e);
 
+/*
+	Similar to openat: opens a file relative to a dirfd, but returns
+	a FILE pointer instead of an fd.
+ */
+FILE *fopenat(int fd, const char *filename, const char *mode);
+
 #endif /* UTIL_H */