Name
psignal, psiginfo — print signal message
Synopsis
#include <signal.h>
void
psignal( |
int sig, |
const char *s); |
void
psiginfo( |
const siginfo_t *pinfo, |
const char *s); |
![[Note]](../stylesheet/note.png) |
Note | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
extern const char *const sys_siglist[];
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
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 array sys_siglist holds
the signal description strings indexed by signal number.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
psignal(), psiginfo() |
Thread safety | MT-Safe locale |
BUGS
In glibc versions up to 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.