.\" errno.1 - manual page for the errno command
.\" Copyright (C) 2009  Lars Wirzenius
.\"
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.\" it under the terms of the GNU General Public License as published by
.\" the Free Software Foundation, either version 3 of the License, or
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.TH ERRNO 1
.SH NAME
errno \- look up errno codes or names
.SH SYNOPSIS
.B errno
.RI [ code | name ]...
.SH DESCRIPTION
.B errno
prints the description of 
.BR errno (3)
values, from the command line.
It can look descriptions based on the numeric code or names like
.BR EEXIST .
.PP
For example, to look up what the code 2 means:
.sp 1
.nf
.RS
$ errno 2
ENOENT 2 No such file or directory
.RE
.fi
.sp 1
Similarly, to look up what the code EEXIST means:
.sp 1
.nf
.RS
$ errno EEXIST
EEXIST 17 File exists
.RE
.fi
.sp 1
Note that the output always lists both the name and the code.
.SH "SEE ALSO"
.BR errno (3).