. \"  Manual Seite fuer geterrno
. \" @(#)geterrno.3	1.1
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.TH GETERRNO 3 "15. Juli 1988" "J\*org Schilling" "Schily\'s LIBRARY FUNCTIONS"
.SH NAME
geterrno() \- gets system error number
.SH SYNOPSIS
.B
int geterrno()
.SH DESCRIPTION
geterrno() enables the programmer to find out exactly what the
last failure was. This is often necessary since some
subroutines just indicate success or failure, rather than
directly return definitive error codes.
.PP
For example, comerr() uses geterrno() to learn the error so that
an appropriate message can be printed.
.SH RETURNS
Returns the error code for the last system error that occurred
in the current process, e.g., after a call to fileopen() failed.
.SH "SEE ALSO"
comerr(3), comerrno(3), error(3), errmsg(3)
.SH NOTES
The value returned by geterrno() is only valid after the
immediately preceding system call failed.