200 lines
4.9 KiB
HTML
200 lines
4.9 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of PSIGNAL</TITLE>
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</HEAD><BODY>
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<H1>PSIGNAL</H1>
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Section: Linux Programmer's Manual (3)<BR>Updated: 2017-09-15<BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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psignal, psiginfo - print signal message
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<PRE>
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<B>#include <<A HREF="file:///usr/include/signal.h">signal.h</A>></B>
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<B>void psignal(int </B><I>sig</I><B>, const char *</B><I>s</I><B>);</B>
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<B>void psiginfo(const siginfo_t *</B><I>pinfo</I><B>, const char *</B><I>s</I><B>);</B>
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<B>extern const char *const </B><I>sys_siglist</I><B>[];</B>
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</PRE>
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<P>
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Feature Test Macro Requirements for glibc (see
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<B><A HREF="/cgi-bin/man/man2html?7+feature_test_macros">feature_test_macros</A></B>(7)):
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<P>
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<B>psignal</B>():
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<BR> Since glibc 2.19:
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<BR> _DEFAULT_SOURCE
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<BR> Glibc 2.19 and earlier:
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<BR> _BSD_SOURCE || _SVID_SOURCE
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<BR>
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<B>psiginfo</B>():
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_POSIX_C_SOURCE >= 200809L
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<BR>
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<I>sys_siglist</I>:
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<BR> Since glibc 2.19:
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<BR> _DEFAULT_SOURCE
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<BR> Glibc 2.19 and earlier:
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<BR> _BSD_SOURCE
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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The
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<B>psignal</B>()
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function displays a message on <I>stderr</I>
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consisting of the string <I>s</I>, a colon, a space, a string
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describing the signal number <I>sig</I>, and a trailing newline.
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If the string <I>s</I> is NULL or empty, the colon and space are omitted.
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If <I>sig</I> is invalid,
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the message displayed will indicate an unknown signal.
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<P>
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The
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<B>psiginfo</B>()
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function is like
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<B>psignal</B>(),
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except that it displays information about the signal described by
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<I>pinfo</I>,
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which should point to a valid
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<I>siginfo_t</I>
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structure.
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As well as the signal description,
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<B>psiginfo</B>()
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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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<B>SIGCHLD</B>,
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and the user ID and process ID of the sender, for signals set using
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<B><A HREF="/cgi-bin/man/man2html?2+kill">kill</A></B>(2)
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or
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<B><A HREF="/cgi-bin/man/man2html?3+sigqueue">sigqueue</A></B>(3)).
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<P>
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The array <I>sys_siglist</I> holds the signal description strings
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indexed by signal number.
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<A NAME="lbAE"> </A>
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<H2>RETURN VALUE</H2>
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The
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<B>psignal</B>()
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and
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<B>psiginfo</B>()
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functions return no value.
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<A NAME="lbAF"> </A>
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<H2>VERSIONS</H2>
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The
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<B>psiginfo</B>()
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function was added to glibc in version 2.10.
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<A NAME="lbAG"> </A>
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<H2>ATTRIBUTES</H2>
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For an explanation of the terms used in this section, see
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<B><A HREF="/cgi-bin/man/man2html?7+attributes">attributes</A></B>(7).
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<TABLE BORDER>
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<TR VALIGN=top><TD><B>Interface</B></TD><TD><B>Attribute</B></TD><TD><B>Value</B><BR></TD></TR>
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<TR VALIGN=top><TD>
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<B>psignal</B>(),
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<B>psiginfo</B>()
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</TD><TD>Thread safety</TD><TD>MT-Safe locale<BR></TD></TR>
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</TABLE>
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<P>
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<A NAME="lbAH"> </A>
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<H2>CONFORMING TO</H2>
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POSIX.1-2008, 4.3BSD.
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<A NAME="lbAI"> </A>
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<H2>BUGS</H2>
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In glibc versions up to 2.12,
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<B>psiginfo</B>()
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had the following bugs:
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<DL COMPACT>
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<DT id="1">*<DD>
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In some circumstances, a trailing newline is not printed.
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<DT id="2">*<DD>
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Additional details are not displayed for real-time signals.
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</DL>
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<A NAME="lbAJ"> </A>
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<H2>SEE ALSO</H2>
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<B><A HREF="/cgi-bin/man/man2html?2+sigaction">sigaction</A></B>(2),
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<B><A HREF="/cgi-bin/man/man2html?3+perror">perror</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+strsignal">strsignal</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?7+signal">signal</A></B>(7)
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<A NAME="lbAK"> </A>
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<H2>COLOPHON</H2>
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This page is part of release 5.05 of the Linux
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<I>man-pages</I>
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project.
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A description of the project,
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information about reporting bugs,
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and the latest version of this page,
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can be found at
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<A HREF="https://www.kernel.org/doc/man-pages/.">https://www.kernel.org/doc/man-pages/.</A>
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="3"><A HREF="#lbAB">NAME</A><DD>
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<DT id="4"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="5"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="6"><A HREF="#lbAE">RETURN VALUE</A><DD>
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<DT id="7"><A HREF="#lbAF">VERSIONS</A><DD>
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<DT id="8"><A HREF="#lbAG">ATTRIBUTES</A><DD>
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<DT id="9"><A HREF="#lbAH">CONFORMING TO</A><DD>
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<DT id="10"><A HREF="#lbAI">BUGS</A><DD>
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<DT id="11"><A HREF="#lbAJ">SEE ALSO</A><DD>
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<DT id="12"><A HREF="#lbAK">COLOPHON</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:05:52 GMT, March 31, 2021
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