file_to_filebuf: isdir output parameter

2 files changed, 9 insertions, 6 deletions

diff --git a/src/io/read_file.c b/src/io/read_file.c
index 219a395..22e0286 100644
--- a/src/io/read_file.c
+++ b/src/io/read_file.c
@@ -60,18 +60,20 @@ static void *fd_to_mmap(const int fd, struct stat sb) {
   return addr;
 }
 
-struct filebuf *file_to_filebuf(char *fname, int openOptions) {
+struct filebuf *file_to_filebuf(char *fname, int openOptions, bool *isdir) {
   const int fd = open(fname, O_RDONLY);
   if (fd == -1) {
     return NULL;
   }
 
-  if (openOptions & O_NOALLOWMAP) {
-    goto sponge;
-  }
-
   struct stat sb;
   if (fstat(fd, &sb) == -1) {
+    return NULL;
+  }
+
+  if (isdir != NULL) *isdir = S_ISDIR(sb.st_mode);
+
+  if (openOptions & O_NOALLOWMAP) {
     goto sponge;
   }
 
diff --git a/src/io/read_file.h b/src/io/read_file.h
index 89f738b..d097c05 100644
--- a/src/io/read_file.h
+++ b/src/io/read_file.h
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <stdbool.h>
 #include <stddef.h>
 #include <stdio.h>
 
@@ -20,5 +21,5 @@ struct filebuf {
 };
 
 struct filebuf *stream_to_filebuf(FILE *restrict stream, int openOptions);
-struct filebuf *file_to_filebuf(char *fname, int openOptions);
+struct filebuf *file_to_filebuf(char *fname, int openOptions, bool *isdir);
 void free_filebuf(struct filebuf *filebuf);