diff --git a/src/oshash.c b/src/oshash.c
index 8701830..0d79d65 100644
--- a/src/oshash.c
+++ b/src/oshash.c
@@ -100,19 +100,24 @@ unsigned long long gen_oshash(char const *filename) {
     return t1;
 }
 
-void print_oshash(FILE *output, char const *filename) {
+int print_oshash(FILE *output, char const *filename) {
     char hash[32];
 #ifdef WIN32
     sprintf(hash, "%016I64x", gen_oshash(filename));
 #else
     sprintf(hash, "%016qx", gen_oshash(filename));
 #endif
-    if (strcmp(hash,"0000000000000000") > 0)
+    if (strcmp(hash,"0000000000000000") > 0) {
         fprintf(output, "%s  %s\n", hash, filename);
+        return 0;
+    } else {
+        fprintf(output,"%s: No such file or permission denied\n",filename);
+        return 1;
+    }
 }
 
 int main(int argc, char **argv) {
-    int i;
+    int i,r=0;
     FILE* output = stdout;
     
     if(argc == 1) {
@@ -120,6 +125,6 @@ int main(int argc, char **argv) {
         exit(1);
     }
     for(i=1;i<argc;i++)
-        print_oshash(output, argv[i]);
-    return 0;
+        r+=print_oshash(output, argv[i]);
+    return r>0?1:0;
 }