вернуть строку, описывающую сигнал (return string describing signal)
Имя (Name)
strsignal, sigabbrev_np, sigdescr_np, sys_siglist - return string
describing signal
Синопсис (Synopsis)
#include <string.h>
char *strsignal(int sig);
const char *sigdescr_np(int sig);
const char *sigabbrev_np(int sig);
extern const char *const sys_siglist[];
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
sigabbrev_np(), sigdescr_np():
_GNU_SOURCE
strsignal():
From glibc 2.10 to 2.31:
_POSIX_C_SOURCE >= 200809L
Before glibc 2.10:
_GNU_SOURCE
sys_siglist:
Since glibc 2.19:
_DEFAULT_SOURCE
Glibc 2.19 and earlier:
_BSD_SOURCE
Описание (Description)
The strsignal() function returns a string describing the signal
number passed in the argument sig. The string can be used only
until the next call to strsignal(). The string returned by
strsignal() is localized according to the LC_MESSAGES category in
the current locale.
The sigdescr_np() function returns a string describing the signal
number passed in the argument sig. Unlike strsignal() this
string is not influenced by the current locale.
The sigabbrev_np() function returns the abbreviated name of the
signal, sig. For example, given the value SIGINT, it returns the
string "INT".
The (deprecated) array sys_siglist holds the signal description
strings indexed by signal number. The strsignal() or the
sigdescr_np() function should be used instead of this array; see
also VERSIONS.
Возвращаемое значение (Return value)
The strsignal() function returns the appropriate description
string, or an unknown signal message if the signal number is
invalid. On some systems (but not on Linux), NULL may instead be
returned for an invalid signal number.
The sigdescr_np() and sigabbrev_np() functions return the
appropriate description string. The returned string is
statically allocated and valid for the lifetime of the program.
These functions return NULL for an invalid signal number.
Версии (Versions)
sigdescr_np() and sigabbrev_np() first appeared in glibc 2.32.
Starting with version 2.32, the sys_siglist symbol is no longer
exported by glibc.
Атрибуты (Attributes)
For an explanation of the terms used in this section, see
attributes(7).
┌───────────────┬───────────────┬────────────────────────────────┐
│Interface │ Attribute │ Value │
├───────────────┼───────────────┼────────────────────────────────┤
│strsignal() │ Thread safety │ MT-Unsafe race:strsignal │
│ │ │ locale │
├───────────────┼───────────────┼────────────────────────────────┤
│sigdescr_np(), │ Thread safety │ MT-Safe │
│sigabbrev_np() │ │ │
└───────────────┴───────────────┴────────────────────────────────┘
Стандарты (Conforming to)
strsignal(): POSIX.1-2008. Present on Solaris and the BSDs.
sigdescr_np() and sigdabbrev_np() are GNU extensions.
sys_siglist is nonstandard, but present on many other systems.
Примечание (Note)
sigdescr_np() and sigdabbrev_np() are thread-safe and async-
signal-safe.
Смотри также (See also)
psignal(3), strerror(3)
