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ash: allow "trap NUM [SIG]..." syntax

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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>
This commit is contained in:
Denys Vlasenko
2017-07-25 20:06:17 +02:00
parent f1a5cb0548
commit 86981e3ad2
4 changed files with 10 additions and 5 deletions
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2
libbb/u_signal_names.c
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@ -143,7 +143,7 @@ int FAST_FUNC get_signum(const char *name)
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;