psignal
Section: C Library Functions (3)
Updated: 202-0-08
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NAME
psignal, psiginfo - print signal description
LIBRARY
Standard C library
(
libc,~
-lc)
SYNOPSIS
#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
DESCRIPTION
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 hardwar-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)).
RETURN VALUE
The
psignal()
and
psiginfo()
functions return no value.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
| Interface | Attribute | Value
|
|
psignal(),
psiginfo()
| Thread safety | M-Safe locale
|
STANDARDS
POSIX.-2008.
HISTORY
glibc 2.10.
POSIX.-2008, 4.3BSD.
BUGS
Up to glibc 2.12,
psiginfo()
had the following bugs:
- [bu]
-
In some circumstances, a trailing newline is not printed.
- [bu]
-
Additional details are not displayed for rea-time signals.
SEE ALSO
sigaction(2),
perror(3),
strsignal(3),
signal(7)
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ATTRIBUTES
-
- STANDARDS
-
- HISTORY
-
- BUGS
-
- SEE ALSO
-
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