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/* $Id: plugin_file.c 782 2007-03-21 05:01:11Z michael $
* $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/plugin_file.c $
*
* plugin to perform simple file operations
*
* Copyright (C) 2006 Chris Maj <cmaj@freedomcorpse.com>
* Copyright (C) 2006 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
*
* This file is part of LCD4Linux.
*
* LCD4Linux 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, or (at your option)
* any later version.
*
* LCD4Linux 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/*
* exported functions:
*
* int plugin_init_file (void)
* adds various functions
*
*/
/* define the include files you need */
#include "config.h"
#include <stdio.h>
#include <string.h>
/* these should always be included */
#include "debug.h"
#include "plugin.h"
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif
/* function 'readline' */
/* takes two arguments, file name and line number */
/* returns text of that line */
static void my_readline(RESULT * result, RESULT * arg1, RESULT * arg2)
{
char value[80], val2[80];
FILE *fp;
int reqline, i, size;
reqline = R2N(arg2);
fp = fopen(R2S(arg1), "r");
if (!fp) {
error("readline couldn't open file '%s'", R2S(arg1));
value[0] = '\0';
} else {
i = 0;
while (!feof(fp) && i++ < reqline) {
fgets(val2, sizeof(val2), fp);
size = strcspn(val2, "\r\n");
strncpy(value, val2, size);
value[size] = '\0';
/* more than 80 chars, chew up rest of line */
while (!feof(fp) && strchr(val2, '\n') == NULL) {
fgets(val2, sizeof(val2), fp);
}
}
fclose(fp);
if (i <= reqline) {
error("readline requested line %d but file only had %d lines", reqline, i - 1);
value[0] = '\0';
}
}
/* store result */
SetResult(&result, R_STRING, &value);
}
/* plugin initialization */
/* MUST NOT be declared 'static'! */
int plugin_init_file(void)
{
/* register all our cool functions */
/* the second parameter is the number of arguments */
/* -1 stands for variable argument list */
AddFunction("file::readline", 2, my_readline);
return 0;
}
void plugin_exit_file(void)
{
/* free any allocated memory */
/* close filedescriptors */
}
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