container: fix .dockerenv stat check
[project/procd.git] / utils / utils.h
1 /*
2 * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
3 * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU Lesser General Public License version 2.1
7 * as published by the Free Software Foundation
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14
15 #ifndef __PROCD_UTILS_H
16 #define __PROCD_UTILS_H
17
18 #include <libubox/avl.h>
19 #include <libubox/blob.h>
20 #include <libubox/blobmsg.h>
21
22 #define CMDLINE_SIZE 2048
23
24 struct blobmsg_list_node {
25 struct avl_node avl;
26 struct blob_attr *data;
27 };
28
29 typedef bool (*blobmsg_list_cmp)(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2);
30 typedef void (*blobmsg_update_cb)(struct blobmsg_list_node *n);
31
32 struct blobmsg_list {
33 struct avl_tree avl;
34 int node_offset;
35 int node_len;
36
37 blobmsg_list_cmp cmp;
38 };
39
40 #define blobmsg_list_simple_init(list) \
41 __blobmsg_list_init(list, 0, sizeof(struct blobmsg_list_node), NULL)
42
43 #define blobmsg_list_init(list, type, field, cmp) \
44 __blobmsg_list_init(list, offsetof(type, field), sizeof(type), cmp)
45
46 #define blobmsg_list_for_each(list, element) \
47 avl_for_each_element(&(list)->avl, element, avl)
48
49 void __blobmsg_list_init(struct blobmsg_list *list, int offset, int len, blobmsg_list_cmp cmp);
50 int blobmsg_list_fill(struct blobmsg_list *list, void *data, int len, bool array);
51 void blobmsg_list_free(struct blobmsg_list *list);
52 bool blobmsg_list_equal(struct blobmsg_list *l1, struct blobmsg_list *l2);
53 void blobmsg_list_move(struct blobmsg_list *list, struct blobmsg_list *src);
54 char* get_cmdline_val(const char* name, char* out, int len);
55
56 int patch_fd(const char *device, int fd, int flags);
57 int patch_stdio(const char *device);
58
59 #endif