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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | STANDARDS | HISTORY | BUGS | SEE ALSO | COLOPHON |
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psignal(3) Library Functions Manual psignal(3)
psignal, psiginfo - print signal description
Standard C library (libc, -lc)
#include <signal.h>
void psignal(int sig, const char *s);
void psiginfo(const siginfo_t *pinfo, const char *s);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
psignal():
Since glibc 2.19:
_DEFAULT_SOURCE
glibc 2.19 and earlier:
_BSD_SOURCE || _SVID_SOURCE
psiginfo():
_POSIX_C_SOURCE >= 200809L
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 psignal() and psiginfo() functions return no value.
For an explanation of the terms used in this section, see
attributes(7).
┌───────────────────────────────┬───────────────┬────────────────┐
│ Interface │ Attribute │ Value │
├───────────────────────────────┼───────────────┼────────────────┤
│ psignal(), psiginfo() │ Thread safety │ MT-Safe locale │
└───────────────────────────────┴───────────────┴────────────────┘
POSIX.1-2008.
glibc 2.10. POSIX.1-2008, 4.3BSD.
Up to glibc 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.
sigaction(2), perror(3), strsignal(3), signal(7)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.15.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2025-08-11. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
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man-pages@man7.org
Linux man-pages 6.15 2025-05-17 psignal(3)
Pages that refer to this page: strsignal(3), system_data_types(7)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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