PSIGNAL(3)						     Linux Programmer's Manual							PSIGNAL(3)

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);

       extern const char *const sys_siglist[];

   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
       sys_siglist:
	   Since glibc 2.19:
	       _DEFAULT_SOURCE
	   Glibc 2.19 and earlier:
	       _BSD_SOURCE

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.

RETURN VALUE

       The psignal() and psiginfo() functions return no value.

VERSIONS

       The psiginfo() function was added to glibc in version 2.10.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).

       +----------------------+---------------+----------------+
       |Interface	      | Attribute     | Value	       |
       +----------------------+---------------+----------------+
       |psignal(), psiginfo() | Thread safety | MT-Safe locale |
       +----------------------+---------------+----------------+

CONFORMING TO

       POSIX.1-2008, 4.3BSD.

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.

SEE ALSO

       sigaction(2), perror(3), strsignal(3), signal(7)

COLOPHON

       This page is part of release 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and  the
       latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

GNU
								    2017-09-15								PSIGNAL(3)