38 lines
1.3 KiB
Groff
38 lines
1.3 KiB
Groff
. \" Manual Seite fuer geterrno
|
|
. \" @(#)geterrno.3 1.1
|
|
. \"
|
|
.if t .ds a \v'-0.55m'\h'0.00n'\z.\h'0.40n'\z.\v'0.55m'\h'-0.40n'a
|
|
.if t .ds o \v'-0.55m'\h'0.00n'\z.\h'0.45n'\z.\v'0.55m'\h'-0.45n'o
|
|
.if t .ds u \v'-0.55m'\h'0.00n'\z.\h'0.40n'\z.\v'0.55m'\h'-0.40n'u
|
|
.if t .ds A \v'-0.77m'\h'0.25n'\z.\h'0.45n'\z.\v'0.77m'\h'-0.70n'A
|
|
.if t .ds O \v'-0.77m'\h'0.25n'\z.\h'0.45n'\z.\v'0.77m'\h'-0.70n'O
|
|
.if t .ds U \v'-0.77m'\h'0.30n'\z.\h'0.45n'\z.\v'0.77m'\h'-.75n'U
|
|
.if t .ds s \(*b
|
|
.if t .ds S SS
|
|
.if n .ds a ae
|
|
.if n .ds o oe
|
|
.if n .ds u ue
|
|
.if n .ds s sz
|
|
.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.
|