PSIGNAL(3) Linux Programmer's Manual PSIGNAL(3)NAME
psignal, psiginfo - print signal message
SYNOPSIS
#include <signal.h>
void psignal(int sig, const char *s);
void psiginfo(const siginfo_t *pinfo, const char *s);
extern const char *const sys_siglist[];
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
psignal(): _SVID_SOURCE || _BSD_SOURCE
psiginfo(): _XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
sys_siglist: _BSD_SOURCE
DESCRIPTION
The psignal() function displays a message on stderr consisting of the
string s, a colon, a space, a string describing the signal number sig,
and a trailing newline. If the string s is NULL or empty, the colon
and space are omitted. If sig is invalid, the message displayed will
indicate an unknown signal.
The psiginfo() function is like psignal(), except that it displays
information about the signal described by pinfo, which should point to
a valid siginfo_t structure. As well as the signal description, psig‐
info() displays information about the origin of the signal, and other
information relevant to the signal (e.g., the relevant memory address
for hardware-generated signals, the child process ID for SIGCHLD, and
the user ID and process ID of the sender, for signals set using kill(2)
or sigqueue(3)).
The array sys_siglist holds the signal description strings indexed by
signal number.
RETURN VALUE
The psignal() and psiginfo() functions return no value.
VERSIONS
The psiginfo() function was added to glibc in version 2.10.
CONFORMING TO
POSIX.1-2008, 4.3BSD.
BUGS
In glibc versions up to 2.12, psiginfo() had the following bugs:
* In some circumstances, a trailing newline is not printed.
* Additional details are not displayed for real-time signals.
SEE ALSOsigaction(2), perror(3), strsignal(3), signal(7)COLOPHON
This page is part of release 3.55 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
GNU 2010-10-06 PSIGNAL(3)
