term% cat index.txt PERROR(3) Library Functions Manual PERROR(3)
NAME
perror, sys_errlist, sys_nerr - system error messages
SYNOPSIS
perror(s)
char *s;
int sys_nerr;
char *sys_errlist[];
DESCRIPTION
Perror produces a short error message on the standard error file de‐
scribing the last error encountered during a call to the system from a
C program. First the argument string s is printed, then a colon, then
the message and a new-line. The error number is taken from the exter‐
nal variable errno (see intro(2)), which is set when errors occur but
not cleared when non-erroneous calls are made.
Sys_errlist is a vector of message strings. Errno can be used as an
index in this table to get the message string without the newline.
Sys_nerr is the number of messages in the table.
SEE ALSO
intro(2)
PERROR(3)