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libbb: optionally support RTMIN[+n] and RTMAX[-n] signal names

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function                                             old     new   delta
get_signum                                           140     336    +196
__libc_allocate_rtsig                                  -      56     +56
__libc_current_sigrtmin                                -       6      +6
__libc_current_sigrtmax                                -       6      +6
current_rtmin                                          -       4      +4
current_rtmax                                          -       4      +4
bbconfig_config_bz2                                 4961    4962      +1
------------------------------------------------------------------------------
(add/remove: 6/0 grow/shrink: 2/0 up/down: 273/0)             Total: 273 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2010-12-30 01:17:03 +01:00
parent 90615a0c5c
commit 2753aae0e8
2 changed files with 38 additions and 6 deletions
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2
libbb/Config.src
View File

@ -135,7 +135,7 @@ config FEATURE_NON_POSIX_CP
and create a regular file. This does not conform to POSIX,
but prevents a symlink attack.
Similarly, "cp file device" will not send file's data
to the device.
to the device. (To do that, use "cat file >device")
config FEATURE_VERBOSE_CP_MESSAGE
bool "Give more precise messages when copy fails (cp, mv etc)"

42
libbb/u_signal_names.c
View File

@ -7,6 +7,13 @@
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
//config:config FEATURE_RTMINMAX
//config: bool "Support RTMIN[+n] and RTMAX[-n] signal names"
//config: default y
//config: help
//config: Support RTMIN[+n] and RTMAX[-n] signal names
//config: in kill, killall etc. This costs ~250 bytes.
#include "libbb.h"
/* Believe it or not, but some arches have more than 32 SIGs!
@ -134,20 +141,45 @@ int FAST_FUNC get_signum(const char *name)
if (strcasecmp(name, signals[i]) == 0)
return i;
#if ENABLE_DESKTOP && (defined(SIGIOT) || defined(SIGIO))
#if ENABLE_DESKTOP
# if defined(SIGIOT) || defined(SIGIO)
/* SIGIO[T] are aliased to other names,
* thus cannot be stored in the signals[] array.
* Need special code to recognize them */
if ((name[0] | 0x20) == 'i' && (name[1] | 0x20) == 'o') {
#ifdef SIGIO
# ifdef SIGIO
if (!name[2])
return SIGIO;
#endif
#ifdef SIGIOT
# endif
# ifdef SIGIOT
if ((name[2] | 0x20) == 't' && !name[3])
return SIGIOT;
#endif
# endif
}
# endif
#endif
#if ENABLE_FEATURE_RTMINMAX
# if defined(SIGRTMIN) && defined(SIGRTMAX)
if (strncasecmp(name, "RTMAX", 5) == 0) {
if (!name[5])
return SIGRTMAX;
if (name[5] == '-') {
i = bb_strtou(name + 6, NULL, 10);
if (!errno && i <= SIGRTMAX - SIGRTMIN)
return SIGRTMAX - i;
}
}
if (strncasecmp(name, "RTMIN", 5) == 0) {
if (!name[5])
return SIGRTMIN;
if (name[5] == '+') {
i = bb_strtou(name + 6, NULL, 10);
if (!errno && i <= SIGRTMAX - SIGRTMIN)
return SIGRTMIN + i;
}
}
# endif
#endif
return -1;