PERROR(3C)              COMMAND REFERENCE              PERROR(3C)



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 describing 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 newline.  Most
     usefully, the argument string is the name of the program
     which incurred the error.  The error number is taken from
     the external variable errno (see intro(2)), which is set
     when errors occur but not cleared when nonerroneous calls
     are made.

     To simplify variant formatting of messages, the vector of
     message strings sys_errlist is provided; 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 provided
     for in the table; it should be checked because new error
     codes may be added to the system before they are added to
     the table.

SEE ALSO
     intro(2) and psignal(3c).
























Printed 3/13/89                                                 1

%%index%%
na:312,105;
sy:417,635;
de:1052,1255;
se:2307,161;
%%index%%000000000084