PSIGNAL(3) Linux Programmer's Manual PSIGNAL(3)
psignal, psiginfo - print signal message
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
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.
The psignal() and psiginfo() functions return no value.
The psiginfo() function was added to glibc in version 2.10.
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.
sigaction(2), perror(3), strsignal(3), signal(7)
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GNU 2010-10-06 PSIGNAL(3)