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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>
This commit is contained in:
Junio C Hamano 2007-11-17 21:18:14 -08:00
parent 78e694787c
commit 4b87474bc9
1 changed files with 3 additions and 3 deletions
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6
builtin-grep.c
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@ -294,7 +294,7 @@ static int external_grep(struct grep_opt *opt, const char **paths, int cached)
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 @@ static int external_grep(struct grep_opt *opt, const char **paths, int cached)
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 @@ static int external_grep(struct grep_opt *opt, const char **paths, int cached)
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);