+'\" t
.\" Copyright 1993 David Metcalfe (david@prism.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-.\" manual page may be incorrect or out-of-date.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.
+.\" SPDX-License-Identifier: Linux-man-pages-copyleft
.\"
.\" 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 (faith@cs.unc.edu)
-.TH PSIGNAL 3 1993-04-13 "GNU" "Linux Programmer's Manual"
+.TH psignal 3 (date) "Linux man-pages (unreleased)"
.SH NAME
-psignal \- print signal message
+psignal, psiginfo \- print signal description
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <signal.h>
-.sp
+.P
.BI "void psignal(int " sig ", const char *" s );
-.sp
-.BI "extern const char *const " sys_siglist [];
+.BI "void psiginfo(const siginfo_t *" pinfo ", const char *" s );
+.fi
+.P
+.RS -4
+Feature Test Macro Requirements for glibc (see
+.BR feature_test_macros (7)):
+.RE
+.P
+.BR psignal ():
+.nf
+ Since glibc 2.19:
+ _DEFAULT_SOURCE
+ glibc 2.19 and earlier:
+ _BSD_SOURCE || _SVID_SOURCE
+.fi
+.P
+.BR psiginfo ():
+.nf
+ _POSIX_C_SOURCE >= 200809L
.fi
.SH DESCRIPTION
-The \fBpsignal()\fP function displays a message on \fIstderr\fP
-consisting of the string \fIs\fP, a colon, a space, and a string
-describing the signal number \fIsig\fP. If \fIsig\fP is invalid,
+The
+.BR psignal ()
+function displays a message on \fIstderr\fP
+consisting of the string \fIs\fP, a colon, a space, a string
+describing the signal number \fIsig\fP, and a trailing newline.
+If the string \fIs\fP is NULL or empty, the colon and space are omitted.
+If \fIsig\fP is invalid,
the message displayed will indicate an unknown signal.
-.PP
-The array \fIsys_siglist\fP holds the signal description strings
-indexed by signal number.
-.SH "RETURN VALUE"
-The \fBpsignal()\fP function returns no value.
-.SH "CONFORMING TO"
-BSD 4.3
-.SH "SEE ALSO"
+.P
+The
+.BR psiginfo ()
+function is like
+.BR psignal (),
+except that it displays information about the signal described by
+.IR pinfo ,
+which should point to a valid
+.I siginfo_t
+structure.
+As well as the signal description,
+.BR 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
+.BR SIGCHLD ,
+and the user ID and process ID of the sender, for signals set using
+.BR kill (2)
+or
+.BR sigqueue (3)).
+.SH RETURN VALUE
+The
+.BR psignal ()
+and
+.BR psiginfo ()
+functions return no value.
+.SH ATTRIBUTES
+For an explanation of the terms used in this section, see
+.BR attributes (7).
+.TS
+allbox;
+lbx lb lb
+l l l.
+Interface Attribute Value
+T{
+.na
+.nh
+.BR psignal (),
+.BR psiginfo ()
+T} Thread safety MT-Safe locale
+.TE
+.SH STANDARDS
+POSIX.1-2008.
+.SH HISTORY
+glibc 2.10.
+POSIX.1-2008, 4.3BSD.
+.SH BUGS
+Up to glibc 2.12,
+.BR psiginfo ()
+had the following bugs:
+.IP \[bu] 3
+In some circumstances, a trailing newline is not printed.
+.\" FIXME . http://sourceware.org/bugzilla/show_bug.cgi?id=12107
+.\" Reportedly now fixed; check glibc 2.13
+.IP \[bu]
+Additional details are not displayed for real-time signals.
+.\" FIXME . http://sourceware.org/bugzilla/show_bug.cgi?id=12108
+.\" Reportedly now fixed; check glibc 2.13
+.SH SEE ALSO
+.BR sigaction (2),
.BR perror (3),
-.BR strsignal (3)
+.BR strsignal (3),
+.BR signal (7)
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