Fail if the format is not supported

Signed-off-by: Olivier Gayot <og@satcom1.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/stegmp.c b/stegmp.c
index 825fd8f..87715dd 100644
--- a/stegmp.c
+++ b/stegmp.c
@@ -232,7 +232,9 @@ static int stegmp_parse_headers(const unsigned char *addr, size_t orig_size,
     bmpp->data_offset = packed_header.data_offset;
     bmpp->size = packed_header.bmp_size;
 
-    stegmp_parse_dib_header(addr + sizeof(packed_header), orig_size, bmpp);
+    if (stegmp_parse_dib_header(addr + sizeof(packed_header), orig_size, bmpp) < 0) {
+        return -1;
+    }
 
     return 0;
 }
@@ -246,6 +248,7 @@ static int stegmp(const char *bmp_file, FILE *input)
     struct stat stat;
     struct bitmap bmp;
     FILE *fh = fopen(bmp_file, "r+");
+    int ret = 0;
 
     if (fh == NULL) {
         fprintf(stderr, "%s: %m\n", bmp_file);
@@ -273,12 +276,13 @@ static int stegmp(const char *bmp_file, FILE *input)
     } else {
         fprintf(stderr, "unable to parse headers: %s\n",
                 bmp_strerror(bmp_errno));
+        ret = -1;
     }
 
     munmap(addr, stat.st_size);
     fclose(fh);
 
-    return 0;
+    return ret;
 }
 
 static inline int stegmp_read(const char *bmp_file)