#!/bin/sh -e
#
#    errno - search POSIX error codes by error number, error name,
#            or error description
#    Copyright (C) 2010 Dustin Kirkland <kirkland@ubuntu.com>
#
#    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/>.

# Header finding trick from Kees Cook <kees@ubuntu.com>
headers=$(echo "#include <asm/errno.h>" | gcc -E - | grep "\.h" | awk -F\" '{print $2}' | sort -u)

if echo "$code" | egrep -qs "^[0-9]+$"; then
	# Input is a number, search for a particular matching code
	egrep -h "^#define\s.*\s+$code\s+/" $headers | sed 's/^#define\s*//'
else
	# Input is not a number, search for any matching strings
	grep -hi "$code" $headers | sed 's/^#define\s*//'
fi