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.Dd $Mdocdate: June 5 2013 $ .Dt PSIGNAL 3 .Os .Sh NAME .Nm psignal , .Nm sys_siglist , .Nm sys_signame .Nd system signal messages .Sh SYNOPSIS n signal.h .Ft void .Fn psignal "unsigned int sig" "const char *s" .Vt extern char *sys_siglist[]; .Vt extern char *sys_signame[]; .Sh DESCRIPTION The .Fn psignal function locates the descriptive message string for the given signal number .Fa sig and writes it to the standard error.
p If the argument .Fa s is not .Dv 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 .Xr sigaction 2 for a list), the string .Dq Unknown signal is produced.
p The message strings can be accessed directly using the external array .Va sys_siglist , indexed by recognized signal numbers. The external array .Va 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 .Dv NSIG contains a count of the strings in .Va sys_siglist and .Va sys_signame . .Sh SEE ALSO .Xr sigaction 2 , .Xr perror 3 , .Xr setlocale 3 , .Xr strsignal 3 .Sh HISTORY The .Fn psignal function appeared in x 4.2 . .Sh CAVEATS On systems other than .Ox , the .Dv LC_MESSAGES .Xr locale 1 category can cause different strings to be printed instead of the normal signal descriptions; see CAVEATS in .Xr setlocale 3 for details.