2 files changed, 8 insertions, 0 deletions

diff --git a/cgit.h b/cgit.h
index f01f6c9..6937c42 100644
--- a/cgit.h
+++ b/cgit.h
@@ -159,2 +159,3 @@ extern int chk_zero(int result, char *msg);
 extern int chk_positive(int result, char *msg);
+extern int chk_non_negative(int result, char *msg);
 
diff --git a/shared.c b/shared.c
index 1a5b866..65fc8b2 100644
--- a/shared.c
+++ b/shared.c
@@ -88,2 +88,9 @@ int chk_positive(int result, char *msg)
 
+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)