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-rw-r--r--src/feh_png.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/feh_png.c b/src/feh_png.c
index d0c1c8a..8f5b94d 100644
--- a/src/feh_png.c
+++ b/src/feh_png.c
@@ -197,7 +197,10 @@ int feh_png_file_is_png(FILE * fp)
{
unsigned char buf[8];
- fread(buf, 1, 8, fp);
+ if (fread(buf, 1, 8, fp) != 8) {
+ return 0;
+ }
+
if (png_sig_cmp(buf, 0, 8)) {
return 0;
}