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.\" errno.1 - manual page for the errno command
.\" Copyright (C) 2009 Lars Wirzenius
.\"
.\" This program is free software: you can redistribute it and/or modify
.\" it under the terms of the GNU General Public License as published by
.\" the Free Software Foundation, either version 3 of the License, or
.\" (at your option) any later version.
.\"
.\" This program is distributed in the hope that it will be useful,
.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
.\" GNU General Public License for more details.
.\"
.\" You should have received a copy of the GNU General Public License
.\" along with this program. If not, see <http://www.gnu.org/licenses/>.
.\"
.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).
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