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/*
* Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
* Copyright (C) 2013 John Crispin <blogic@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1
* 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.
*/
#include <libubox/avl.h>
#include <libubox/avl-cmp.h>
#include "utils.h"
#include <asm-generic/setup.h>
#include <regex.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
void
__blobmsg_list_init(struct blobmsg_list *list, int offset, int len, blobmsg_list_cmp cmp)
{
avl_init(&list->avl, avl_strcmp, false, NULL);
list->node_offset = offset;
list->node_len = len;
list->cmp = cmp;
}
int
blobmsg_list_fill(struct blobmsg_list *list, void *data, int len, bool array)
{
struct avl_tree *tree = &list->avl;
struct blobmsg_list_node *node;
struct blob_attr *cur;
void *ptr;
int count = 0;
int rem = len;
__blob_for_each_attr(cur, data, rem) {
if (!blobmsg_check_attr(cur, !array))
continue;
ptr = calloc(1, list->node_len);
if (!ptr)
return -1;
node = (void *) ((char *)ptr + list->node_offset);
if (array)
node->avl.key = blobmsg_data(cur);
else
node->avl.key = blobmsg_name(cur);
node->data = cur;
if (avl_insert(tree, &node->avl)) {
free(ptr);
continue;
}
count++;
}
return count;
}
void
blobmsg_list_move(struct blobmsg_list *list, struct blobmsg_list *src)
{
struct blobmsg_list_node *node, *tmp;
void *ptr;
avl_remove_all_elements(&src->avl, node, avl, tmp) {
if (avl_insert(&list->avl, &node->avl)) {
ptr = ((char *) node - list->node_offset);
free(ptr);
}
}
}
void
blobmsg_list_free(struct blobmsg_list *list)
{
struct blobmsg_list_node *node, *tmp;
void *ptr;
avl_remove_all_elements(&list->avl, node, avl, tmp) {
ptr = ((char *) node - list->node_offset);
free(ptr);
}
}
bool
blobmsg_list_equal(struct blobmsg_list *l1, struct blobmsg_list *l2)
{
struct blobmsg_list_node *n1, *n2;
int count = l1->avl.count;
if (count != l2->avl.count)
return false;
n1 = avl_first_element(&l1->avl, n1, avl);
n2 = avl_first_element(&l2->avl, n2, avl);
while (count-- > 0) {
int len;
len = blob_len(n1->data);
if (len != blob_len(n2->data))
return false;
if (memcmp(n1->data, n2->data, len) != 0)
return false;
if (l1->cmp && !l1->cmp(n1, n2))
return false;
if (!count)
break;
n1 = avl_next_element(n1, avl);
n2 = avl_next_element(n2, avl);
}
return true;
}
char* get_cmdline_val(const char* name, char* out, int len)
{
char pattern[CMDLINE_SIZE + 1];
char line[CMDLINE_SIZE + 1];
char *res = NULL, *tty;
int r, fd;
regex_t pat_cmdline;
regmatch_t matches[2];
fd = open("/proc/cmdline", O_RDONLY);
if (fd < 0)
return NULL;
r = read(fd, line, CMDLINE_SIZE);
if ( r <= 0 ) {
close(fd);
return NULL;
}
line[r] = '\0';
close(fd);
sprintf( pattern, "%s=([^ \n]*)", name);
regcomp(&pat_cmdline, pattern, REG_EXTENDED);
if (!regexec(&pat_cmdline, line, 2, matches, 0)) {
line[matches[1].rm_eo] = '\0';
tty = (line + matches[1].rm_so);
strncpy(out, tty, len);
tty[len-1] = '\0';
res = out;
}
regfree(&pat_cmdline);
return res;
}
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