получить название сигнала (get name of signal)
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
strsignal — get name of signal
Синопсис (Synopsis)
#include <string.h>
char *strsignal(int signum);
Описание (Description)
The strsignal() function shall map the signal number in signum to
an implementation-defined string and shall return a pointer to
it. It shall use the same set of messages as the psignal()
function.
The application shall not modify the string returned. The
returned pointer might be invalidated or the string content might
be overwritten by a subsequent call to strsignal() or
setlocale(). The returned pointer might also be invalidated if
the calling thread is terminated.
The contents of the message strings returned by strsignal()
should be determined by the setting of the LC_MESSAGES category
in the current locale.
The implementation shall behave as if no function defined in this
standard calls strsignal().
Since no return value is reserved to indicate an error, an
application wishing to check for error situations should set
errno to 0, then call strsignal(), then check errno.
The strsignal() function need not be thread-safe.
Возвращаемое значение (Return value)
Upon successful completion, strsignal() shall return a pointer to
a string. Otherwise, if signum is not a valid signal number, the
return value is unspecified.
Ошибки (Error)
No errors are defined.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
If signum is not a valid signal number, some implementations
return NULL, while for others the strsignal() function returns a
pointer to a string containing an unspecified message denoting an
unknown signal. POSIX.1‐2008 leaves this return value
unspecified.
Будущие направления (Future directions)
None.
Смотри также (See also)
psiginfo(3p), setlocale(3p)
The Base Definitions volume of POSIX.1‐2017, string.h(0p)
