path: root/builtin/merge-index.c
diff options
authorJeff King <>2015-09-24 21:06:08 (GMT)
committerJunio C Hamano <>2015-09-25 17:18:18 (GMT)
commit5096d4909f9b13c7a650d9dbb7c9702ea7413566 (patch)
tree07229a8952f2d6782f3064d9dfd1e7855e8e5269 /builtin/merge-index.c
parentdb85a8a9c2fb492d3cd528dbbcc52075c607cf79 (diff)
convert trivial sprintf / strcpy calls to xsnprintf
We sometimes sprintf into fixed-size buffers when we know that the buffer is large enough to fit the input (either because it's a constant, or because it's numeric input that is bounded in size). Likewise with strcpy of constant strings. However, these sites make it hard to audit sprintf and strcpy calls for buffer overflows, as a reader has to cross-reference the size of the array with the input. Let's use xsnprintf instead, which communicates to a reader that we don't expect this to overflow (and catches the mistake in case we do). Signed-off-by: Jeff King <> Signed-off-by: Junio C Hamano <>
Diffstat (limited to 'builtin/merge-index.c')
1 files changed, 1 insertions, 1 deletions
diff --git a/builtin/merge-index.c b/builtin/merge-index.c
index 1a1eafa..1d66111 100644
--- a/builtin/merge-index.c
+++ b/builtin/merge-index.c
@@ -23,7 +23,7 @@ static int merge_entry(int pos, const char *path)
strcpy(hexbuf[stage], sha1_to_hex(ce->sha1));
- sprintf(ownbuf[stage], "%o", ce->ce_mode);
+ xsnprintf(ownbuf[stage], sizeof(ownbuf[stage]), "%o", ce->ce_mode);
arguments[stage] = hexbuf[stage];
arguments[stage + 4] = ownbuf[stage];
} while (++pos < active_nr);