SIMPLE SOLUTIONS

PSIGNAL, PSIGINFO - reference manual online

Print signal message.

Chapter
2015-07-23
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(): _SVID_SOURCE || _BSD_SOURCE psiginfo(): _XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L sys_siglist: _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 dis‐ played 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 hard‐ ware-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 4.04 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 http://www.kernel.org/doc/man-pages/.
GNU 2015-07-23 PSIGNAL(3)
This manual Reference Other manuals
psignal(3) referred by strsignal(3)
refer to attributes(7) | feature_test_macros(7) | kill(2) | perror(3) | sigaction(2) | signal(7) | sigqueue(3) | strsignal(3)