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1/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
2/*
3 * Special types used by various syscalls for NOLIBC
4 * Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>
5 */
6
7#ifndef _NOLIBC_TYPES_H
8#define _NOLIBC_TYPES_H
9
10#include "std.h"
11#include <linux/time.h>
12
13
14/* Only the generic macros and types may be defined here. The arch-specific
15 * ones such as the O_RDONLY and related macros used by fcntl() and open(), or
16 * the layout of sys_stat_struct must not be defined here.
17 */
18
19/* stat flags (WARNING, octal here) */
20#define S_IFDIR 0040000
21#define S_IFCHR 0020000
22#define S_IFBLK 0060000
23#define S_IFREG 0100000
24#define S_IFIFO 0010000
25#define S_IFLNK 0120000
26#define S_IFSOCK 0140000
27#define S_IFMT 0170000
28
29#define S_ISDIR(mode) (((mode) & S_IFDIR) == S_IFDIR)
30#define S_ISCHR(mode) (((mode) & S_IFCHR) == S_IFCHR)
31#define S_ISBLK(mode) (((mode) & S_IFBLK) == S_IFBLK)
32#define S_ISREG(mode) (((mode) & S_IFREG) == S_IFREG)
33#define S_ISFIFO(mode) (((mode) & S_IFIFO) == S_IFIFO)
34#define S_ISLNK(mode) (((mode) & S_IFLNK) == S_IFLNK)
35#define S_ISSOCK(mode) (((mode) & S_IFSOCK) == S_IFSOCK)
36
37/* dirent types */
38#define DT_UNKNOWN 0x0
39#define DT_FIFO 0x1
40#define DT_CHR 0x2
41#define DT_DIR 0x4
42#define DT_BLK 0x6
43#define DT_REG 0x8
44#define DT_LNK 0xa
45#define DT_SOCK 0xc
46
47/* commonly an fd_set represents 256 FDs */
48#ifndef FD_SETSIZE
49#define FD_SETSIZE 256
50#endif
51
52/* PATH_MAX and MAXPATHLEN are often used and found with plenty of different
53 * values.
54 */
55#ifndef PATH_MAX
56#define PATH_MAX 4096
57#endif
58
59#ifndef MAXPATHLEN
60#define MAXPATHLEN (PATH_MAX)
61#endif
62
63/* Special FD used by all the *at functions */
64#ifndef AT_FDCWD
65#define AT_FDCWD (-100)
66#endif
67
68/* whence values for lseek() */
69#define SEEK_SET 0
70#define SEEK_CUR 1
71#define SEEK_END 2
72
73/* cmd for reboot() */
74#define LINUX_REBOOT_MAGIC1 0xfee1dead
75#define LINUX_REBOOT_MAGIC2 0x28121969
76#define LINUX_REBOOT_CMD_HALT 0xcdef0123
77#define LINUX_REBOOT_CMD_POWER_OFF 0x4321fedc
78#define LINUX_REBOOT_CMD_RESTART 0x01234567
79#define LINUX_REBOOT_CMD_SW_SUSPEND 0xd000fce2
80
81/* Macros used on waitpid()'s return status */
82#define WEXITSTATUS(status) (((status) & 0xff00) >> 8)
83#define WIFEXITED(status) (((status) & 0x7f) == 0)
84
85/* waitpid() flags */
86#define WNOHANG 1
87
88/* standard exit() codes */
89#define EXIT_SUCCESS 0
90#define EXIT_FAILURE 1
91
92/* for select() */
93typedef struct {
94 uint32_t fd32[(FD_SETSIZE + 31) / 32];
95} fd_set;
96
97#define FD_CLR(fd, set) do { \
98 fd_set *__set = (set); \
99 int __fd = (fd); \
100 if (__fd >= 0) \
101 __set->fd32[__fd / 32] &= ~(1U << (__fd & 31)); \
102 } while (0)
103
104#define FD_SET(fd, set) do { \
105 fd_set *__set = (set); \
106 int __fd = (fd); \
107 if (__fd >= 0) \
108 __set->fd32[__fd / 32] |= 1U << (__fd & 31); \
109 } while (0)
110
111#define FD_ISSET(fd, set) ({ \
112 fd_set *__set = (set); \
113 int __fd = (fd); \
114 int __r = 0; \
115 if (__fd >= 0) \
116 __r = !!(__set->fd32[__fd / 32] & 1U << (__fd & 31)); \
117 __r; \
118 })
119
120#define FD_ZERO(set) do { \
121 fd_set *__set = (set); \
122 int __idx; \
123 for (__idx = 0; __idx < (FD_SETSIZE+31) / 32; __idx ++) \
124 __set->fd32[__idx] = 0; \
125 } while (0)
126
127/* for poll() */
128#define POLLIN 0x0001
129#define POLLPRI 0x0002
130#define POLLOUT 0x0004
131#define POLLERR 0x0008
132#define POLLHUP 0x0010
133#define POLLNVAL 0x0020
134
135struct pollfd {
136 int fd;
137 short int events;
138 short int revents;
139};
140
141/* for getdents64() */
142struct linux_dirent64 {
143 uint64_t d_ino;
144 int64_t d_off;
145 unsigned short d_reclen;
146 unsigned char d_type;
147 char d_name[];
148};
149
150/* needed by wait4() */
151struct rusage {
152 struct timeval ru_utime;
153 struct timeval ru_stime;
154 long ru_maxrss;
155 long ru_ixrss;
156 long ru_idrss;
157 long ru_isrss;
158 long ru_minflt;
159 long ru_majflt;
160 long ru_nswap;
161 long ru_inblock;
162 long ru_oublock;
163 long ru_msgsnd;
164 long ru_msgrcv;
165 long ru_nsignals;
166 long ru_nvcsw;
167 long ru_nivcsw;
168};
169
170/* The format of the struct as returned by the libc to the application, which
171 * significantly differs from the format returned by the stat() syscall flavours.
172 */
173struct stat {
174 dev_t st_dev; /* ID of device containing file */
175 ino_t st_ino; /* inode number */
176 mode_t st_mode; /* protection */
177 nlink_t st_nlink; /* number of hard links */
178 uid_t st_uid; /* user ID of owner */
179 gid_t st_gid; /* group ID of owner */
180 dev_t st_rdev; /* device ID (if special file) */
181 off_t st_size; /* total size, in bytes */
182 blksize_t st_blksize; /* blocksize for file system I/O */
183 blkcnt_t st_blocks; /* number of 512B blocks allocated */
184 time_t st_atime; /* time of last access */
185 time_t st_mtime; /* time of last modification */
186 time_t st_ctime; /* time of last status change */
187};
188
189/* WARNING, it only deals with the 4096 first majors and 256 first minors */
190#define makedev(major, minor) ((dev_t)((((major) & 0xfff) << 8) | ((minor) & 0xff)))
191#define major(dev) ((unsigned int)(((dev) >> 8) & 0xfff))
192#define minor(dev) ((unsigned int)(((dev) & 0xff))
193
194#ifndef offsetof
195#define offsetof(TYPE, FIELD) ((size_t) &((TYPE *)0)->FIELD)
196#endif
197
198#ifndef container_of
199#define container_of(PTR, TYPE, FIELD) ({ \
200 __typeof__(((TYPE *)0)->FIELD) *__FIELD_PTR = (PTR); \
201 (TYPE *)((char *) __FIELD_PTR - offsetof(TYPE, FIELD)); \
202})
203#endif
204
205#endif /* _NOLIBC_TYPES_H */