| .\" 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 |
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| .\" |
| .\" 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| .\" manual page may be incorrect or out-of-date.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 (faith@cs.unc.edu) |
| .TH PSIGNAL 3 2010-10-06 "GNU" "Linux Programmer's Manual" |
| .SH NAME |
| psignal, psiginfo \- print signal message |
| .SH SYNOPSIS |
| .nf |
| .B #include <signal.h> |
| .sp |
| .BI "void psignal(int " sig ", const char *" s ); |
| .BI "void psiginfo(const siginfo_t *" pinfo ", const char *" s ); |
| .sp |
| .BI "extern const char *const " sys_siglist []; |
| .fi |
| .sp |
| .in -4n |
| Feature Test Macro Requirements for glibc (see |
| .BR feature_test_macros (7)): |
| .in |
| .sp |
| .BR psignal (): |
| _SVID_SOURCE || _BSD_SOURCE |
| .br |
| .BR psiginfo (): |
| _XOPEN_SOURCE\ >=\ 700 || _POSIX_C_SOURCE\ >=\ 200809L |
| .br |
| .IR sys_siglist : |
| _BSD_SOURCE |
| .SH DESCRIPTION |
| 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. |
| |
| 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)). |
| |
| The array \fIsys_siglist\fP holds the signal description strings |
| indexed by signal number. |
| .SH "RETURN VALUE" |
| The |
| .BR psignal () |
| and |
| .BR psiginfo () |
| functions return no value. |
| .SH VERSIONS |
| The |
| .BR psiginfo () |
| function was added to glibc in version 2.10. |
| .SH "CONFORMING TO" |
| POSIX.1-2008, 4.3BSD. |
| .SH BUGS |
| In glibc versions up to 2.12, |
| .BR psiginfo () |
| had the following bugs: |
| .IP * 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 * |
| 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 signal (7) |
