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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | VERSIONS | ATTRIBUTES | CONFORMING TO | BUGS | SEE ALSO | COLOPHON |
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PSIGNAL(3) Linux Programmer's Manual PSIGNAL(3)
psignal, psiginfo - print signal message
#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():
Since glibc 2.19:
_DEFAULT_SOURCE
Glibc 2.19 and earlier:
_BSD_SOURCE || _SVID_SOURCE
psiginfo(): _POSIX_C_SOURCE >= 200809L
sys_siglist:
Since glibc 2.19:
_DEFAULT_SOURCE
Glibc 2.19 and earlier:
_BSD_SOURCE
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,
psiginfo() 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.
The psignal() and psiginfo() functions return no value.
The psiginfo() function was added to glibc in version 2.10.
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────┬───────────────┬────────────────┐
│Interface │ Attribute │ Value │
├──────────────────────┼───────────────┼────────────────┤
│psignal(), psiginfo() │ Thread safety │ MT-Safe locale │
└──────────────────────┴───────────────┴────────────────┘
POSIX.1-2008, 4.3BSD.
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.
sigaction(2), perror(3), strsignal(3), signal(7)
This page is part of release 4.15 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
GNU 2017-09-15 PSIGNAL(3)
Pages that refer to this page: strsignal(3)
Copyright and license for this manual page
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