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-rw-r--r--libc/signal/sighold.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/libc/signal/sighold.c b/libc/signal/sighold.c
index f8003d60f..fde0a0c2a 100644
--- a/libc/signal/sighold.c
+++ b/libc/signal/sighold.c
@@ -30,10 +30,9 @@ int sighold (int sig)
sigset_t set;
/* Retrieve current signal set. */
- if (sigprocmask (SIG_SETMASK, NULL, &set) < 0)
- return -1;
+ sigprocmask (SIG_SETMASK, NULL, &set); /* can't fail */
- /* Add the specified signal. */
+ /* Bound-check sig, add it to the set. */
if (sigaddset (&set, sig) < 0)
return -1;