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/*
winnie - an experimental window system
Copyright (C) 2013 Eleni Maria Stea
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 3 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, see <http://www.gnu.org/licenses/>.
Author: Eleni Maria Stea <elene.mst@gmail.com>
*/
#include "client_plugins.h"
#include <ctype.h>
#include <dlfcn.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <vector>
struct Plugin {
void *so;
bool (*init)();
void (*cleanup)();
};
static char *strip_wspace(char *s);
static std::vector<Plugin> plugins;
bool
init_client_plugins()
{
FILE *fp = fopen("plugins.conf", "r");
if (!fp) {
fprintf(stderr,
"failed to load plugin list: plugins.conf: %s\n",
strerror(errno));
return false;
}
plugins.clear();
char buf[512];
while (fgets(buf, sizeof buf, fp)) {
char *line = strip_wspace(buf);
if (!*line || *line == '#') {
continue;
}
Plugin plugin;
plugin.so = dlopen(line, RTLD_LAZY);
if (!plugin.so) {
fprintf(stderr, "failed to load plugin: %s: %s\n", line, dlerror());
continue;
}
if (!(plugin.init = (bool (*)()) dlsym(plugin.so, "init"))) {
fprintf(stderr, "invalid plugin: %s: no init function\n", line);
dlclose(plugin.so);
continue;
}
plugin.cleanup = (void (*)()) dlsym(plugin.so, "cleanup");
if (!plugin.init()) {
fprintf(stderr, "failed to initialize plugin: %s\n", line);
dlclose(plugin.so);
continue;
}
printf("loaded plugin: %s\n", line);
plugins.push_back(plugin);
}
fclose(fp);
return true;
}
void
destroy_client_plugins()
{
for (size_t i = 0; i < plugins.size(); i++) {
if (plugins[i].cleanup) {
plugins[i].cleanup();
}
dlclose(plugins[i].so);
}
plugins.clear();
}
static char *
strip_wspace(char *s)
{
if (!s || !*s) {
return s;
}
while (*s && isspace(*s))
s++;
char *endp = s + strlen(s) - 1;
while (*endp && isspace(*endp)) {
*endp-- = 0;
}
return s;
}
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