busybox/libbb/signals.c
Denis Vlasenko 25591c322c libbb: introduce bb_signals and bb_signals_recursive,
which sets same handler for many signals. sig_catch is nuked
(bb_signals_recursive is more descriptive name).
*: use them as appropriate. 

function                                             old     new   delta
bb_signals_recursive                                   -      95     +95
bb_signals                                             -      52     +52
run_command                                          258     273     +15
svlogd_main                                         1368    1377      +9
runsv_main                                          1746    1752      +6
runsvdir_main                                       1643    1646      +3
UNSPEC_print                                          64      66      +2
time_main                                           1128    1127      -1
...
resize_main                                          246     210     -36
sig_catch                                             63       -     -63
set_fatal_sighandler                                  85      14     -71
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 5/24 up/down: 182/-548)        Total: -366 bytes
2008-02-16 22:58:56 +00:00

81 lines
1.2 KiB
C

/* vi: set sw=4 ts=4: */
/*
* Utility routines.
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
* Copyright (C) 2006 Rob Landley
* Copyright (C) 2006 Denis Vlasenko
*
* Licensed under GPL version 2, see file LICENSE in this tarball for details.
*/
#include "libbb.h"
void bb_signals(int sigs, void (*f)(int))
{
int sig_no = 0;
int bit = 1;
while (sigs) {
if (sigs & bit) {
sigs &= ~bit;
signal(sig_no, f);
}
sig_no++;
bit <<= 1;
}
}
void bb_signals_recursive(int sigs, void (*f)(int))
{
int sig_no = 0;
int bit = 1;
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = f;
/*sa.sa_flags = 0;*/
/*sigemptyset(&sa.sa_mask); - hope memset did it*/
while (sigs) {
if (sigs & bit) {
sigs &= ~bit;
sigaction(sig_no, &sa, NULL);
}
sig_no++;
bit <<= 1;
}
}
void sig_block(int sig)
{
sigset_t ss;
sigemptyset(&ss);
sigaddset(&ss, sig);
sigprocmask(SIG_BLOCK, &ss, NULL);
}
void sig_unblock(int sig)
{
sigset_t ss;
sigemptyset(&ss);
sigaddset(&ss, sig);
sigprocmask(SIG_UNBLOCK, &ss, NULL);
}
#if 0
void sig_blocknone(void)
{
sigset_t ss;
sigemptyset(&ss);
sigprocmask(SIG_SETMASK, &ss, NULL);
}
#endif
void sig_pause(void)
{
sigset_t ss;
sigemptyset(&ss);
sigsuspend(&ss);
}