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-rw-r--r--src/applyperms.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/src/applyperms.c b/src/applyperms.c
index f707af34..491afc83 100644
--- a/src/applyperms.c
+++ b/src/applyperms.c
@@ -142,9 +142,10 @@ gitspecial(struct special *sp, const char *rev)
char *argv[] = {"git", "show", object, 0};
FILE *f;
pid_t pid;
- int st;
+ int st, n;
- if (snprintf(object, sizeof(object), "%s:%s", rev, PERMS_FILE) >= (int)sizeof(object))
+ n = snprintf(object, sizeof(object), "%s:%s", rev, PERMS_FILE);
+ if (n < 0 || n >= (int)sizeof(object))
die("revision is too large: %s", rev);
f = spawn(argv, &pid);
readspecial(sp, f);