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/*
* netifd - network interface daemon
* Copyright (C) 2012-2013 Felix Fietkau <nbd@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation
*
* 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.
*/
#define _GNU_SOURCE
#include <glob.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include "netifd.h"
#include "system.h"
#include "handler.h"
static int
netifd_dir_push(int fd)
{
int prev_fd = open(".", O_RDONLY | O_DIRECTORY);
system_fd_set_cloexec(prev_fd);
if (fd >= 0)
fchdir(fd);
return prev_fd;
}
static void
netifd_dir_pop(int prev_fd)
{
fchdir(prev_fd);
close(prev_fd);
}
int netifd_open_subdir(const char *name)
{
int prev_dir;
int ret = -1;
prev_dir = netifd_dir_push(-1);
if (chdir(main_path)) {
perror("chdir(main path)");
goto out;
}
ret = open(name, O_RDONLY | O_DIRECTORY);
if (ret >= 0)
system_fd_set_cloexec(ret);
out:
netifd_dir_pop(prev_dir);
return ret;
}
static void
netifd_init_script_handler(const char *name, script_dump_cb cb)
{
struct json_tokener *tok = NULL;
json_object *obj;
static char buf[512];
char *start, *cmd;
FILE *f;
int len;
#define DUMP_SUFFIX " '' dump"
cmd = alloca(strlen(name) + 1 + sizeof(DUMP_SUFFIX));
sprintf(cmd, "%s" DUMP_SUFFIX, name);
f = popen(cmd, "r");
if (!f)
return;
do {
start = fgets(buf, sizeof(buf), f);
if (!start)
continue;
len = strlen(start);
if (!tok)
tok = json_tokener_new();
obj = json_tokener_parse_ex(tok, start, len);
if (!is_error(obj)) {
cb(name, obj);
json_object_put(obj);
json_tokener_free(tok);
tok = NULL;
} else if (start[len - 1] == '\n') {
json_tokener_free(tok);
tok = NULL;
}
} while (!feof(f) && !ferror(f));
if (tok)
json_tokener_free(tok);
pclose(f);
}
void netifd_init_script_handlers(int dir_fd, script_dump_cb cb)
{
glob_t g;
int i, prev_fd;
prev_fd = netifd_dir_push(dir_fd);
glob("./*.sh", 0, NULL, &g);
for (i = 0; i < g.gl_pathc; i++)
netifd_init_script_handler(g.gl_pathv[i], cb);
netifd_dir_pop(prev_fd);
}
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