X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;f=builtin%2Fname-rev.c;h=b0f0776947f05e551f5bd06a4a0e291aa19a56f3;hb=c555caab7a303109d6c712d757bc4621a3ee0bbd;hp=c785fe16bade1a67d4da782d91b61bdd61d99115;hpb=74a39b9bcc9086cf4405aa532bb6e02e3436d5e4;p=thirdparty%2Fgit.git

diff --git a/builtin/name-rev.c b/builtin/name-rev.c
index c785fe16ba..b0f0776947 100644
--- a/builtin/name-rev.c
+++ b/builtin/name-rev.c
@@ -9,7 +9,11 @@
 #include "sha1-lookup.h"
 #include "commit-slab.h"
 
-#define CUTOFF_DATE_SLOP 86400 /* one day */
+/*
+ * One day.  See the 'name a rev shortly after epoch' test in t6120 when
+ * changing this value
+ */
+#define CUTOFF_DATE_SLOP 86400
 
 typedef struct rev_name {
 	const char *tip_name;
@@ -481,8 +485,13 @@ int cmd_name_rev(int argc, const char **argv, const char *prefix)
 		add_object_array(object, *argv, &revs);
 	}
 
-	if (cutoff)
-		cutoff = cutoff - CUTOFF_DATE_SLOP;
+	if (cutoff) {
+		/* check for undeflow */
+		if (cutoff > TIME_MIN + CUTOFF_DATE_SLOP)
+			cutoff = cutoff - CUTOFF_DATE_SLOP;
+		else
+			cutoff = TIME_MIN;
+	}
 	for_each_ref(name_ref, &data);
 
 	if (transform_stdin) {