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/* Copyright (C) 2009 Luke Shumaker
This file is part of rvs.
rvs 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.
rvs is distributed in the hope 1. A user enters a username and passwthat 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 rvs; see the file COPYING.
If not, write to the Free Software Foundation,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <stdlib.h> /* EXIT_FAILURE */
#include <unistd.h> /* file acces */
#include <string.h>
#include <errno.h>
#include <error.h>
#include <dirent.h>
#include <sys/stat.h>
#include "rvs.h"
#include "plugin.h"
void _parse_comment (FILE *file)
{
char c;
while ( (c=getc(file)) != EOF ) {
if ( c == '\n' ) {
ungetc (c, file);
break;
}
}
}
char _parse_escape(FILE *file)
{
char c=getc(file);
switch (c) {
case 'n':
c = '\n';
case '\\':
case '#':
case ':':
break;
default:
error(EXIT_FAILURE,0,"syntax error");
break;
}
return c;
}
char *_parse_depend (FILE *file)
{
size_t nbytes = 10;
char *string = (char *)xmalloc(nbytes);
char c[2] = " \0";
char *cs = (char *)&c;
while ( (c[0]=getc(file)) != EOF ) {
if (c[0] == '\n') {
ungetc (c[0], file);
break;
} else {
switch (c[0]) {
case '\\':
c[0]=_parse_escape(file);
stradds(&nbytes,&string,cs);
break;
case '#':
_parse_comment(file);
break;
default:
stradds(&nbytes,&string,cs);
break;
}
}
}
return string;
}
struct plugin_command *_parse_plugin (struct plugin *plugin, FILE *file)
{
struct plugin_command *command;
command=(struct plugin_command *)xmalloc(sizeof(*command));
command->p_next=NULL;
command->depends=NULL;
size_t nbytes = 10;
char *string = (char *)xmalloc(nbytes);
strcpy(string,"");
char c[2] = " \0";
char *cs = (char *)&c;
if ( (c[0]=getc(file)) == EOF ) {
return NULL;
} else {
ungetc (c[0], file);
}
while ( (c[0]=getc(file)) != EOF ) {
if (c[0] == '\n') {
if (strcmp(string,"")==0) {
free(command);
free(string);
return _parse_plugin(plugin, file);
} else {
command->name=string;
command->p_next=_parse_plugin(plugin, file);
break;
}
} else {
switch (c[0]) {
case '\\':
c[0]=_parse_escape(file);
stradds(&nbytes,&string,cs);
break;
case '#':
_parse_comment(file);
break;
case ':':
command->depends=_parse_depend(file);
break;
default:
stradds(&nbytes,&string,cs);
break;
}
}
}
return command;
}
struct plugin *load_plugin (char *plug_name, char *plugin_conf)
{
printf("loading plugin `%s'\n",plug_name);
struct plugin *plugin=(struct plugin *)xmalloc(sizeof(*plugin));
plugin->name=plug_name;
plugin->next=NULL;
chdir(plug_name);
FILE *file = xfopen(plugin_conf,"r");
plugin->child=_parse_plugin(plugin, file);
fclose( file );
chdir("..");
return plugin;
}
struct plugin_tree *load_plugins (char *libexecdir, char *plugin_conf)
{
struct plugin_tree *tree=(struct plugin_tree *)xmalloc(sizeof(*tree));
struct plugin **last=&tree->plugins;
struct plugin *plugin;
chdir(libexecdir);
DIR *cwd;
struct dirent *dirent;
int serr;
struct stat sbuf;
cwd = xopendir ("./");
while ( (dirent = readdir (cwd)) != NULL ) {
if ((strcmp(dirent->d_name,"." )!=0)&&
(strcmp(dirent->d_name,"..")!=0)) {
serr = stat(dirent->d_name, &sbuf);
if (!serr && S_ISDIR(sbuf.st_mode)) {
plugin=load_plugin(dirent->d_name,plugin_conf);
*last=plugin;
last=&plugin->next;
}
}
}
closedir (cwd);
return tree;
}
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