grep -An -Bm: fix invocation of external grep command
When building command line to invoke external grep, the
arguments to -A/-B/-C options were placd in randarg[] buffer,
but the code forgot that snprintf() does not count terminating
NUL in its return value. This caused "git grep -A1 -B2" to
invoke external grep with "-B21 -A1".
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin-grep.c b/builtin-grep.c
index 185876b..bbf747f 100644
--- a/builtin-grep.c
+++ b/builtin-grep.c
@@ -294,7 +294,7 @@
if (opt->pre_context) {
push_arg("-B");
len += snprintf(argptr, sizeof(randarg)-len,
- "%u", opt->pre_context);
+ "%u", opt->pre_context) + 1;
if (sizeof(randarg) <= len)
die("maximum length of args exceeded");
push_arg(argptr);
@@ -303,7 +303,7 @@
if (opt->post_context) {
push_arg("-A");
len += snprintf(argptr, sizeof(randarg)-len,
- "%u", opt->post_context);
+ "%u", opt->post_context) + 1;
if (sizeof(randarg) <= len)
die("maximum length of args exceeded");
push_arg(argptr);
@@ -313,7 +313,7 @@
else {
push_arg("-C");
len += snprintf(argptr, sizeof(randarg)-len,
- "%u", opt->post_context);
+ "%u", opt->post_context) + 1;
if (sizeof(randarg) <= len)
die("maximum length of args exceeded");
push_arg(argptr);
