added a chk_non_negative check

1 files changed, 7 insertions, 0 deletions

diff --git a/shared.c b/shared.c
index 1a5b866..65fc8b2 100644
--- a/shared.c
+++ b/shared.c
@@ -86,6 +86,13 @@ int chk_positive(int result, char *msg)
         return result;
 }
 
+int chk_non_negative(int result, char *msg)
+{
+        if (result < 0)
+                die("%s: %s",msg, strerror(errno));
+        return result;
+}
+
 struct repoinfo *add_repo(const char *url)
 {
         struct repoinfo *ret;