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/*----------------------------------------------------------------------------*/
/*options.h*/
/*----------------------------------------------------------------------------*/
/*Definitions for parsing the command line switches*/
/*----------------------------------------------------------------------------*/
/*Based on the code of unionfs translator.*/
/*----------------------------------------------------------------------------*/
/*Copyright (C) 2001, 2002, 2005 Free Software Foundation, Inc.
Written by Sergiu Ivanov <unlimitedscolobb@gmail.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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.*/
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
#define _GNU_SOURCE 1
/*----------------------------------------------------------------------------*/
#include <argp.h>
#include <error.h>
/*----------------------------------------------------------------------------*/
#include "debug.h"
#include "options.h"
#include "ncache.h"
#include "node.h"
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
/*--------Macros--------------------------------------------------------------*/
/*Short documentation for argp*/
#define ARGS_DOC "DIR"
#define DOC "Shows the contents of DIR filtered according to PROPERTY.\
If DIR is not specified, ~/ is assumed."
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
/*--------Forward Declarations------------------------------------------------*/
/*Argp parser function for the common options*/
static
error_t
argp_parse_common_options
(
int key,
char * arg,
struct argp_state * state
);
/*----------------------------------------------------------------------------*/
/*Argp parser function for the startup options*/
static
error_t
argp_parse_startup_options
(
int key,
char * arg,
struct argp_state * state
);
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
/*--------Global Variables----------------------------------------------------*/
/*This variable is set to a non-zero value after the parsing of starup options
is finished*/
/*Whenever the argument parser is later called to modify the
options of filterfs the root node will be initialized accordingly directly
by the parser*/
static int parsing_startup_options_finished;
/*----------------------------------------------------------------------------*/
/*Argp options common to both the runtime and the startup parser*/
static const struct argp_option argp_common_options[] =
{
{OPT_LONG_CACHE_SIZE, OPT_CACHE_SIZE, "SIZE", 0,
"The maximal number of nodes in the node cache"},
{OPT_LONG_PROPERTY, OPT_PROPERTY, "PROPERTY", 0,
"The command which will act as a filter"}
};
/*----------------------------------------------------------------------------*/
/*Argp options only meaningful for startupp parsing*/
static const struct argp_option argp_startup_options[] =
{
{0}
};
/*----------------------------------------------------------------------------*/
/*Argp parser for only the common options*/
static const struct argp argp_parser_common_options =
{argp_common_options, argp_parse_common_options, 0, 0, 0};
/*----------------------------------------------------------------------------*/
/*Argp parser for only the startup options*/
static const struct argp argp_parser_startup_options =
{argp_startup_options, argp_parse_startup_options, 0, 0, 0};
/*----------------------------------------------------------------------------*/
/*The list of children parsers for runtime arguments*/
static const struct argp_child argp_children_runtime[] =
{
{&argp_parser_common_options},
{&netfs_std_runtime_argp},
{0}
};
/*----------------------------------------------------------------------------*/
/*The list of children parsers for startup arguments*/
static const struct argp_child argp_children_startup[] =
{
{&argp_parser_startup_options},
{&argp_parser_common_options},
{&netfs_std_startup_argp},
{0}
};
/*----------------------------------------------------------------------------*/
/*The version of the server for argp*/
const char * argp_program_version = "0.0";
/*----------------------------------------------------------------------------*/
/*The arpg parser for runtime arguments*/
struct argp argp_runtime =
{0, 0, 0, 0, argp_children_runtime};
/*----------------------------------------------------------------------------*/
/*The argp parser for startup arguments*/
struct argp argp_startup =
{0, 0, ARGS_DOC, DOC, argp_children_startup};
/*----------------------------------------------------------------------------*/
/*The filtering command*/
char * property = NULL;
/*----------------------------------------------------------------------------*/
/*The directory to filter*/
char * dir = NULL;
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
/*--------Functions-----------------------------------------------------------*/
/*Argp parser function for the common options*/
static
error_t
argp_parse_common_options
(
int key,
char * arg,
struct argp_state * state
)
{
error_t err = 0;
/*Go through the possible options*/
switch(key)
{
case OPT_CACHE_SIZE:
{
/*store the new cache-size*/
ncache_size = strtol(arg, NULL, 10);
break;
}
case OPT_PROPERTY:
{
/*try to duplicate the filtering command*/
property = strdup(arg);
if(!property)
error(EXIT_FAILURE, ENOMEM, "Could not strdup the property");
break;
}
case ARGP_KEY_ARG: /*the directory to filter*/
{
/*try to duplicate the directory name*/
dir = strdup(arg);
if(!dir)
error(EXIT_FAILURE, ENOMEM, "argp_parse_common_options: "
"Could not strdup the directory");
/*fill all trailing spaces with 0*/
int i = strlen(dir) - 1;
/*for(i = strlen(dir) - 1; (i >= 0) && (dir[i] == ' '); dir[i--] = 0);*/
/*the original filename may contain spaces*/
/*If the last non blank symbol is a '/' and it's not the only one*/
if((dir[i] == '/') && (i != 0))
/*put 0 instead*/
dir[i] = 0;
LOG_MSG("argp_parse_common_options: Filtering the directory %s.", dir);
break;
}
case ARGP_KEY_END:
{
/*If parsing of startup options has not finished*/
if(!parsing_startup_options_finished)
{
/*reset the cache*/
ncache_reset();
/*If the directory has not been specified*/
if(!dir)
{
/*assume the directory to be the home directory*/
;
/*FIXME: The default directory is /var/tmp*/
dir = "/var/tmp";
}
/*set the flag that the startup options have already been parsed*/
parsing_startup_options_finished = 1;
}
else
{
/*TODO: Take care of runtime calls modifying the property*/
}
}
/*If the option could not be recognized*/
default:
{
/*set the error code*/
err = ARGP_ERR_UNKNOWN;
}
}
/*Return the result*/
return err;
}/*argp_parse_common_options*/
/*----------------------------------------------------------------------------*/
/*Argp parser function for the startup options*/
static
error_t
argp_parse_startup_options
(
int key,
char * arg,
struct argp_state * state
)
{
/*Do nothing in a beautiful way*/
error_t err = 0;
switch(key)
{
default:
{
err = ARGP_ERR_UNKNOWN;
break;
}
}
return err;
}/*argp_parse_startup_options*/
/*----------------------------------------------------------------------------*/
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