truncate buffer before reading empty files

If readfile() reads an empty file, fgets() won't truncate the buffer
and it'll still contain the contents of the previously read file.

[lh: fixed similar issue in ui-repolist.c]

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/scan-tree.c b/scan-tree.c
index cdafb02..47f3988 100644
--- a/scan-tree.c
+++ b/scan-tree.c
@@ -21,48 +21,49 @@ static int is_git_dir(const char *path)
 	}
 	if (!S_ISDIR(st.st_mode))
 		return 0;
 
 	sprintf(buf, "%s/HEAD", path);
 	if (stat(buf, &st)) {
 		if (errno != ENOENT)
 			fprintf(stderr, "Error checking path %s: %s (%d)\n",
 				path, strerror(errno), errno);
 		return 0;
 	}
 	if (!S_ISREG(st.st_mode))
 		return 0;
 
 	return 1;
 }
 
 char *readfile(const char *path)
 {
 	FILE *f;
 	static char buf[MAX_PATH];
 
 	if (!(f = fopen(path, "r")))
 		return NULL;
+	buf[0] = 0;
 	fgets(buf, MAX_PATH, f);
 	fclose(f);
 	return buf;
 }
 
 static void add_repo(const char *base, const char *path)
 {
 	struct cgit_repo *repo;
 	struct stat st;
 	struct passwd *pwd;
 	char *p;
 
 	if (stat(path, &st)) {
 		fprintf(stderr, "Error accessing %s: %s (%d)\n",
 			path, strerror(errno), errno);
 		return;
 	}
 	if ((pwd = getpwuid(st.st_uid)) == NULL) {
 		fprintf(stderr, "Error reading owner-info for %s: %s (%d)\n",
 			path, strerror(errno), errno);
 		return;
 	}
 	if (base == path)
 		p = fmt("%s", path);