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); |
![[Note]](../stylesheet/note.png) |
Note | ||||||
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extern const char *const sys_siglist[];
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, 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.
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.
COLOPHON
This page is part of release 3.34 of the Linux man-pages project. A
description of the project, and information about reporting
bugs, can be found at http://man7.org/linux/man-pages/.
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Copyright 1993 David Metcalfe (davidprism.demon.co.uk) Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies. Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this one. Since the Linux kernel and libraries are constantly changing, this manual page may be incorrect or out-of-date. The author(s) assume no responsibility for errors or omissions, or for damages resulting from the use of the information contained herein. The author(s) may not have taken the same level of care in the production of this manual, which is licensed free of charge, as they might when working professionally. Formatted or processed versions of this manual, if unaccompanied by the source, must acknowledge the copyright and authors of this work. References consulted: Linux libc source code Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) 386BSD man pages Modified Sat Jul 24 18:45:17 1993 by Rik Faith (faithcs.unc.edu) |