mirror of https://github.com/mkerrisk/man-pages
118 lines
3.6 KiB
Groff
118 lines
3.6 KiB
Groff
.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
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.\"
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.\" %%%LICENSE_START(VERBATIM)
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.\" Permission is granted to make and distribute verbatim copies of this
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.\" manual provided the copyright notice and this permission notice are
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.\" preserved on all copies.
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.\"
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.\" Permission is granted to copy and distribute modified versions of this
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.\" manual under the conditions for verbatim copying, provided that the
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.\" entire resulting derived work is distributed under the terms of a
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.\" permission notice identical to this one.
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.\"
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.\" Since the Linux kernel and libraries are constantly changing, this
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.\" manual page may be incorrect or out-of-date. The author(s) assume no
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.\" responsibility for errors or omissions, or for damages resulting from
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.\" the use of the information contained herein. The author(s) may not
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.\" have taken the same level of care in the production of this manual,
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.\" which is licensed free of charge, as they might when working
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.\" professionally.
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.\"
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.\" Formatted or processed versions of this manual, if unaccompanied by
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.\" the source, must acknowledge the copyright and authors of this work.
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.\" %%%LICENSE_END
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.\"
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.\" References consulted:
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.\" Linux libc source code
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.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
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.\" 386BSD man pages
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.\" Modified Sat Jul 24 18:45:17 1993 by Rik Faith (faith@cs.unc.edu)
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.TH PSIGNAL 3 2010-10-06 "GNU" "Linux Programmer's Manual"
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.SH NAME
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psignal, psiginfo \- print signal message
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.SH SYNOPSIS
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.nf
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.B #include <signal.h>
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.sp
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.BI "void psignal(int " sig ", const char *" s );
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.BI "void psiginfo(const siginfo_t *" pinfo ", const char *" s );
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.sp
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.BI "extern const char *const " sys_siglist [];
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.fi
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.sp
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.in -4n
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Feature Test Macro Requirements for glibc (see
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.BR feature_test_macros (7)):
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.in
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.sp
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.BR psignal ():
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_SVID_SOURCE || _BSD_SOURCE
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.br
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.BR psiginfo ():
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_XOPEN_SOURCE\ >=\ 700 || _POSIX_C_SOURCE\ >=\ 200809L
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.br
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.IR sys_siglist :
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_BSD_SOURCE
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.SH DESCRIPTION
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The
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.BR psignal ()
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function displays a message on \fIstderr\fP
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consisting of the string \fIs\fP, a colon, a space, a string
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describing the signal number \fIsig\fP, and a trailing newline.
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If the string \fIs\fP is NULL or empty, the colon and space are omitted.
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If \fIsig\fP is invalid,
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the message displayed will indicate an unknown signal.
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The
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.BR psiginfo ()
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function is like
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.BR psignal (),
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except that it displays information about the signal described by
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.IR pinfo ,
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which should point to a valid
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.I siginfo_t
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structure.
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As well as the signal description,
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.BR psiginfo ()
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displays information about the origin of the signal,
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and other information relevant to the signal
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(e.g., the relevant memory address for hardware-generated signals,
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the child process ID for
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.BR SIGCHLD ,
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and the user ID and process ID of the sender, for signals set using
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.BR kill (2)
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or
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.BR sigqueue (3)).
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The array \fIsys_siglist\fP holds the signal description strings
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indexed by signal number.
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.SH RETURN VALUE
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The
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.BR psignal ()
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and
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.BR psiginfo ()
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functions return no value.
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.SH VERSIONS
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The
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.BR psiginfo ()
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function was added to glibc in version 2.10.
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.SH CONFORMING TO
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POSIX.1-2008, 4.3BSD.
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.SH BUGS
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In glibc versions up to 2.12,
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.BR psiginfo ()
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had the following bugs:
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.IP * 3
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In some circumstances, a trailing newline is not printed.
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.\" FIXME http://sourceware.org/bugzilla/show_bug.cgi?id=12107
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.\" Reportedly now fixed; check glibc 2.13
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.IP *
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Additional details are not displayed for real-time signals.
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.\" FIXME http://sourceware.org/bugzilla/show_bug.cgi?id=12108
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.\" Reportedly now fixed; check glibc 2.13
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.SH SEE ALSO
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.BR sigaction (2),
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.BR perror (3),
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.BR strsignal (3),
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.BR signal (7)
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