1 file changed, 7 insertions, 1 deletion
diff --git a/source/config.c b/source/config.c
index bfd31b6..84c7293 100644
--- a/source/config.c
+++ b/source/config.c
@@ -103,6 +103,7 @@ int config_file_parse(const char *filename, config_file_value_fn fn)
 	int outer_lines_read = lines_read;
 	struct strbuf name = STRBUF_INIT;
 	struct strbuf value = STRBUF_INIT;
+	struct stat st;
 	FILE *f;
 	int err = 0;
 
@@ -112,12 +113,17 @@ int config_file_parse(const char *filename, config_file_value_fn fn)
 		return 0;
 	if (!(f = fopen(filename, "r")))
 		return errno;
+	// Git's fopen refuses a directory only where its build defines
+	// FREAD_READS_DIRECTORIES, and elsewhere read(2) need not fail on one.
+	if (!fstat(fileno(f), &st) && S_ISDIR(st.st_mode)) {
+		fclose(f);
+		return EISDIR;
+	}
 	config_origin.file = filename;
 	lines_read = 0;
 	nesting++;
 	while (read_entry(f, &name, &value, &config_origin.line))
 		fn(name.buf, value.buf);
-	// A directory opens like a file and fails only once it is read.
 	if (ferror(f))
 		err = errno;
 	nesting--;