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https://github.com/netfun2000/lcd4linux.git
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663f8445f1
plugin_file: return empty string if file cannot be read; widget_text: load property as 'string', not as variable (triggered an ugly bug with variable list reallocated) git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@710 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
120 lines
3.1 KiB
C
120 lines
3.1 KiB
C
/* $Id: plugin_file.c,v 1.3 2006/09/13 05:33:39 reinelt Exp $
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*
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* plugin to perform simple file operations
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*
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* Copyright (C) 2006 Chris Maj <cmaj@freedomcorpse.com>
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* Copyright (C) 2006 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
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*
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* This file is part of LCD4Linux.
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*
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* LCD4Linux is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* LCD4Linux is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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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*
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* $Log: plugin_file.c,v $
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* Revision 1.3 2006/09/13 05:33:39 reinelt
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* plugin_file: return empty string if file cannot be read; widget_text: load property as 'string', not as variable (triggered an ugly bug with variable list reallocated)
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*
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* Revision 1.2 2006/07/19 01:57:01 cmay
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* fixed double read of last line in file
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*
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* Revision 1.1 2006/02/19 15:42:19 reinelt
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* file plugin from Chris Maj
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*
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*/
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/*
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* exported functions:
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*
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* int plugin_init_file (void)
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* adds various functions
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*
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*/
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/* define the include files you need */
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#include "config.h"
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#include <stdio.h>
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#include <string.h>
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/* these should always be included */
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#include "debug.h"
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#include "plugin.h"
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#ifdef WITH_DMALLOC
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#include <dmalloc.h>
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#endif
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/* function 'readline' */
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/* takes two arguments, file name and line number */
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/* returns text of that line */
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static void my_readline(RESULT * result, RESULT * arg1, RESULT * arg2)
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{
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char value[80], val2[80];
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char *pos;
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FILE *fp;
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int reqline, i, size;
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reqline = R2N(arg2);
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fp = fopen(R2S(arg1), "r");
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if (!fp) {
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error("readline couldn't open file '%s'", R2S(arg1));
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value[0] = '\0';
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} else {
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i = 0;
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while (!feof(fp) && i++ < reqline) {
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fgets(val2, sizeof(val2), fp);
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size = strcspn(val2, "\n");
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strncpy(value, val2, size);
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value[size] = '\0';
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pos = strchr(val2, '\n');
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/* more than 80 chars, chew up rest of line */
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while (!pos) {
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fgets(val2, sizeof(val2), fp);
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pos = strchr(val2, '\n');
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}
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}
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fclose(fp);
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if (i <= reqline) {
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error("readline requested line %d but file only had %d lines", reqline, i - 1);
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value[0] = '\0';
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}
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}
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/* store result */
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SetResult(&result, R_STRING, &value);
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}
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/* plugin initialization */
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/* MUST NOT be declared 'static'! */
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int plugin_init_file(void)
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{
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/* register all our cool functions */
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/* the second parameter is the number of arguments */
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/* -1 stands for variable argument list */
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AddFunction("file::readline", 2, my_readline);
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return 0;
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}
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void plugin_exit_file(void)
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{
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/* free any allocated memory */
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/* close filedescriptors */
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}
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