NAME    [Toc]    [Back]

     psignal, strsignal, sys_siglist, sys_signame -- system signal messages

LIBRARY    [Toc]    [Back]

     Standard C Library (libc, -lc)

SYNOPSIS    [Toc]    [Back]

     #include <signal.h>

     void
     psignal(unsigned sig, const char *s);

     extern const char * const sys_siglist[];
     extern const char * const sys_signame[];

     #include <string.h>

     char *
     strsignal(int sig);

DESCRIPTION    [Toc]    [Back]

     The psignal() and strsignal() functions locate the descriptive message
     string for a signal number.

     The strsignal() function accepts a signal number argument sig and returns
     a pointer to the corresponding message string.

     The psignal() function accepts a signal number argument sig and writes it
     to the standard error.  If the argument s is non-NULL and does not point
     to the null character, s 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 (sigaction(2)), the string
     ``Unknown signal'' is produced.

     The message strings can be accessed directly through the external array
     sys_siglist, indexed by recognized signal numbers.  The external array
     sys_signame is used similarly and contains short, lower-case abbreviations
 for signals which are useful for recognizing signal names in user
     input.  The defined variable NSIG contains a count of the strings in
     sys_siglist and sys_signame.

SEE ALSO    [Toc]    [Back]

     sigaction(2), perror(3), strerror(3)

HISTORY    [Toc]    [Back]

     The psignal() function appeared in 4.2BSD.


FreeBSD 5.2.1		       February 27, 1995		 FreeBSD 5.2.1