STRERROR(3)               386BSD Programmer's Manual               STRERROR(3)

NAME
     perror, strerror, syserrlist, sysnerr - system error messages

SYNOPSIS
     extern int errno;
     extern char *sys_errlist[];

     #include <stdio.h>

     void
     perror(const char *string)

     char *
     strerror(int errnum)

DESCRIPTION
     The strerror() and perror() functions lookup the error message string
     affiliated with an error number.

     The sterror() function accepts an error number argument errnum and
     returns a pointer to the corresponding message string.

     The perror() function finds the error message corresponding to the
     current value of the global variable errno and writes it, followed by a
     new-line, to the stderr. If the argument string is non-NULL it is pre-
     appended to the message string and separated from it by a colon and space
     (`: '). If string is NULL only the error message string is printed.

     The message strings can be accessed directly using the external character
     array sys_errlist. The external value sys_nerr contains a count of the
     messages in sys_errlist. The use of these variables is deprecated;
     strerror() should be used instead.

SEE ALSO
     intro(2),  psignal(3)

HISTORY
     The strerror() and perror() functions are currently under development.

4th Berkeley Distribution        June 29, 1991                               1