ash: allow "trap NUM [SIG]..." syntax
While at it, make get_signum() return -1 for numeric strings >= NSIG.
function old new delta
trapcmd 292 306 +14
get_signum 295 300 +5
builtin_trap 413 412 -1
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/1 up/down: 19/-1) Total: 18 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/libbb/u_signal_names.c b/libbb/u_signal_names.c
index bf984a4..b82a706 100644
--- a/libbb/u_signal_names.c
+++ b/libbb/u_signal_names.c
@@ -143,7 +143,7 @@
unsigned i;
i = bb_strtou(name, NULL, 10);
- if (!errno)
+ if (!errno && i < NSIG) /* for shells, we allow 0 too */
return i;
if (strncasecmp(name, "SIG", 3) == 0)
name += 3;