2010-11-21 16:58:30 +01:00
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/*
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* Copyright (C) 2010 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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FILE_LICENCE ( GPL2_OR_LATER );
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#include <stddef.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <getopt.h>
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#include <ipxe/netdevice.h>
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2012-03-29 01:05:22 +02:00
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#include <ipxe/menu.h>
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2010-11-21 16:58:30 +01:00
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#include <ipxe/parseopt.h>
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/** @file
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*
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* Command line option parsing
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*
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*/
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/** Return status code for "--help" option */
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#define ECANCELED_NO_OP __einfo_error ( EINFO_ECANCELED_NO_OP )
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#define EINFO_ECANCELED_NO_OP \
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__einfo_uniqify ( EINFO_ECANCELED, 0x01, "Nothing to do" )
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2011-05-18 10:39:27 +02:00
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/* Disambiguate the various error codes */
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#define EINVAL_INTEGER __einfo_error ( EINFO_EINVAL_INTEGER )
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#define EINFO_EINVAL_INTEGER \
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__einfo_uniqify ( EINFO_EINVAL, 0x01, "Invalid integer value" )
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#define EINVAL_UNKNOWN_OPTION __einfo_error ( EINFO_EINVAL_UNKNOWN_OPTION )
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#define EINFO_EINVAL_UNKNOWN_OPTION \
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__einfo_uniqify ( EINFO_EINVAL, 0x02, "Unrecognised option" )
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#define EINVAL_MISSING_ARGUMENT __einfo_error ( EINFO_EINVAL_MISSING_ARGUMENT )
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#define EINFO_EINVAL_MISSING_ARGUMENT \
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__einfo_uniqify ( EINFO_EINVAL, 0x03, "Missing argument" )
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2010-11-21 16:58:30 +01:00
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/**
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* Parse string value
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*
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* @v text Text
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* @ret value String value
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* @ret rc Return status code
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*/
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int parse_string ( const char *text, const char **value ) {
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/* Sanity check */
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assert ( text != NULL );
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/* Parse string */
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*value = text;
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return 0;
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}
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/**
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* Parse integer value
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*
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* @v text Text
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* @ret value Integer value
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* @ret rc Return status code
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*/
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int parse_integer ( const char *text, unsigned int *value ) {
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char *endp;
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/* Sanity check */
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assert ( text != NULL );
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/* Parse integer */
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2010-11-29 15:18:43 +01:00
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*value = strtoul ( text, &endp, 0 );
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2010-11-21 16:58:30 +01:00
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if ( *endp ) {
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printf ( "\"%s\": invalid integer value\n", text );
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2011-05-18 10:39:27 +02:00
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return -EINVAL_INTEGER;
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2010-11-21 16:58:30 +01:00
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}
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return 0;
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}
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/**
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* Parse network device name
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*
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* @v text Text
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* @ret netdev Network device
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* @ret rc Return status code
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*/
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int parse_netdev ( const char *text, struct net_device **netdev ) {
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/* Sanity check */
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assert ( text != NULL );
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/* Find network device */
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*netdev = find_netdev ( text );
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if ( ! *netdev ) {
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printf ( "\"%s\": no such network device\n", text );
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return -ENODEV;
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}
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return 0;
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}
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2012-03-29 01:05:22 +02:00
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/**
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* Parse menu name
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*
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* @v text Text
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* @ret menu Menu
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* @ret rc Return status code
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*/
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int parse_menu ( const char *text, struct menu **menu ) {
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/* Find menu */
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*menu = find_menu ( text );
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if ( ! *menu ) {
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if ( text ) {
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printf ( "\"%s\": no such menu\n", text );
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} else {
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printf ( "No default menu\n" );
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}
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return -ENOENT;
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}
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return 0;
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}
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2011-03-27 13:46:55 +02:00
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/**
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* Parse flag
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*
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* @v text Text (ignored)
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* @ret flag Flag to set
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* @ret rc Return status code
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*/
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int parse_flag ( const char *text __unused, int *flag ) {
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/* Set flag */
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*flag = 1;
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return 0;
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}
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2012-03-27 20:49:12 +02:00
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/**
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* Parse key
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*
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* @v text Text
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* @ret key Key
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* @ret rc Return status code
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*/
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int parse_key ( const char *text, unsigned int *key ) {
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/* Interpret single characters as being a literal key character */
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if ( text[0] && ! text[1] ) {
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*key = text[0];
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return 0;
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}
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/* Otherwise, interpret as an integer */
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return parse_integer ( text, key );
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}
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2010-11-21 16:58:30 +01:00
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/**
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* Print command usage message
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*
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* @v cmd Command descriptor
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* @v argv Argument list
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*/
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void print_usage ( struct command_descriptor *cmd, char **argv ) {
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2011-03-04 13:14:51 +01:00
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printf ( "Usage:\n\n %s %s\n\nSee http://ipxe.org/cmd/%s for further "
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"information\n", argv[0], cmd->usage, argv[0] );
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}
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/**
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2011-04-24 16:19:31 +02:00
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* Reparse command-line options
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2010-11-21 16:58:30 +01:00
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*
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* @v argc Argument count
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* @v argv Argument list
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* @v cmd Command descriptor
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* @v opts Options (already initialised with default values)
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2010-11-21 16:58:30 +01:00
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* @ret rc Return status code
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*/
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int reparse_options ( int argc, char **argv, struct command_descriptor *cmd,
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void *opts ) {
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2010-11-21 16:58:30 +01:00
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struct option longopts[ cmd->num_options + 1 /* help */ + 1 /* end */ ];
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char shortopts[ cmd->num_options * 3 /* possible "::" */ + 1 /* "h" */
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+ 1 /* NUL */ ];
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unsigned int shortopt_idx = 0;
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int ( * parse ) ( const char *text, void *value );
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void *value;
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unsigned int i;
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unsigned int j;
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unsigned int num_args;
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int c;
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int rc;
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/* Construct long and short option lists for getopt_long() */
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memset ( longopts, 0, sizeof ( longopts ) );
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for ( i = 0 ; i < cmd->num_options ; i++ ) {
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longopts[i].name = cmd->options[i].longopt;
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longopts[i].has_arg = cmd->options[i].has_arg;
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longopts[i].val = cmd->options[i].shortopt;
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shortopts[shortopt_idx++] = cmd->options[i].shortopt;
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assert ( cmd->options[i].has_arg <= optional_argument );
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for ( j = cmd->options[i].has_arg ; j > 0 ; j-- )
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shortopts[shortopt_idx++] = ':';
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}
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longopts[i].name = "help";
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longopts[i].val = 'h';
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shortopts[shortopt_idx++] = 'h';
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shortopts[shortopt_idx++] = '\0';
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assert ( shortopt_idx <= sizeof ( shortopts ) );
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DBGC ( cmd, "Command \"%s\" has options \"%s\", %d-%d args, len %d\n",
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argv[0], shortopts, cmd->min_args, cmd->max_args, cmd->len );
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/* Parse options */
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while ( ( c = getopt_long ( argc, argv, shortopts, longopts,
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NULL ) ) >= 0 ) {
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switch ( c ) {
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case 'h' :
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/* Print help */
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print_usage ( cmd, argv );
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return -ECANCELED_NO_OP;
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case '?' :
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2011-05-18 10:39:27 +02:00
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/* Print usage message */
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print_usage ( cmd, argv );
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return -EINVAL_UNKNOWN_OPTION;
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case ':' :
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/* Print usage message */
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print_usage ( cmd, argv );
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2011-05-18 10:39:27 +02:00
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return -EINVAL_MISSING_ARGUMENT;
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default:
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/* Search for an option to parse */
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for ( i = 0 ; i < cmd->num_options ; i++ ) {
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if ( c != cmd->options[i].shortopt )
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continue;
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parse = cmd->options[i].parse;
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value = ( opts + cmd->options[i].offset );
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if ( ( rc = parse ( optarg, value ) ) != 0 )
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return rc;
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break;
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}
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assert ( i < cmd->num_options );
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}
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}
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/* Check remaining arguments */
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num_args = ( argc - optind );
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if ( ( num_args < cmd->min_args ) || ( num_args > cmd->max_args ) ) {
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print_usage ( cmd, argv );
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return -ERANGE;
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}
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return 0;
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}
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2011-04-24 16:19:31 +02:00
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/**
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* Parse command-line options
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*
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* @v argc Argument count
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* @v argv Argument list
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* @v cmd Command descriptor
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* @v opts Options (may be uninitialised)
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* @ret rc Return status code
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*/
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int parse_options ( int argc, char **argv, struct command_descriptor *cmd,
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void *opts ) {
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/* Clear options */
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memset ( opts, 0, cmd->len );
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return reparse_options ( argc, argv, cmd, opts );
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}
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