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 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, psig-
info() 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)
The array sys_siglist holds the signal description strings indexed by
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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