diff options
Diffstat (limited to 'c/plugin.c')
| -rw-r--r-- | c/plugin.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/c/plugin.c b/c/plugin.c new file mode 100644 index 0000000..7b0146b --- /dev/null +++ b/c/plugin.c @@ -0,0 +1,185 @@ +/* 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; +} + |