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PSIGNAL(3) FreeBSD Library Functions Manual PSIGNAL(3) NAME psignal, sys_siglist, sys_signame - system signal messages SYNOPSIS #include <signal.h> void psignal(unsigned int sig, const char *s); extern char *sys_siglist[]; extern char *sys_signame[]; DESCRIPTION The psignal() function locates the descriptive message string for the given signal number sig and writes it to the standard error. If the argument s is not NULL it is written to the standard error file descriptor prior to the message string, immediately followed by a colon and a space. If the signal number is not recognized (see sigaction(2) for a list), the string "Unknown signal" is produced. The message strings can be accessed directly using the external array sys_siglist, indexed by recognized signal numbers. The external array sys_signame is used similarly and contains short, upper-case abbreviations for signals which are useful for recognizing signal names in user input. The defined value NSIG contains a count of the strings in sys_siglist and sys_signame. SEE ALSO sigaction(2), perror(3), setlocale(3), strsignal(3) HISTORY The psignal() function appeared in 4.2BSD. CAVEATS On systems other than OpenBSD, the LC_MESSAGES locale(1) category can cause different strings to be printed instead of the normal signal descriptions; see CAVEATS in setlocale(3) for details. FreeBSD 14.1-RELEASE-p8 May 16, 2019 FreeBSD 14.1-RELEASE-p8