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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_IFMT) == S_IFDIR)
30#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)
31#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)
32#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
33#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)
34#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
35#define S_ISSOCK(mode) (((mode) & S_IFMT) == 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#define FD_SETIDXMASK (8 * sizeof(unsigned long))
93#define FD_SETBITMASK (8 * sizeof(unsigned long)-1)
94
95/* for select() */
96typedef struct {
97 unsigned long fds[(FD_SETSIZE + FD_SETBITMASK) / FD_SETIDXMASK];
98} fd_set;
99
100#define FD_CLR(fd, set) do { \
101 fd_set *__set = (set); \
102 int __fd = (fd); \
103 if (__fd >= 0) \
104 __set->fds[__fd / FD_SETIDXMASK] &= \
105 ~(1U << (__fd & FX_SETBITMASK)); \
106 } while (0)
107
108#define FD_SET(fd, set) do { \
109 fd_set *__set = (set); \
110 int __fd = (fd); \
111 if (__fd >= 0) \
112 __set->fds[__fd / FD_SETIDXMASK] |= \
113 1 << (__fd & FD_SETBITMASK); \
114 } while (0)
115
116#define FD_ISSET(fd, set) ({ \
117 fd_set *__set = (set); \
118 int __fd = (fd); \
119 int __r = 0; \
120 if (__fd >= 0) \
121 __r = !!(__set->fds[__fd / FD_SETIDXMASK] & \
1221U << (__fd & FD_SET_BITMASK)); \
123 __r; \
124 })
125
126#define FD_ZERO(set) do { \
127 fd_set *__set = (set); \
128 int __idx; \
129 int __size = (FD_SETSIZE+FD_SETBITMASK) / FD_SETIDXMASK;\
130 for (__idx = 0; __idx < __size; __idx++) \
131 __set->fds[__idx] = 0; \
132 } while (0)
133
134/* for poll() */
135#define POLLIN 0x0001
136#define POLLPRI 0x0002
137#define POLLOUT 0x0004
138#define POLLERR 0x0008
139#define POLLHUP 0x0010
140#define POLLNVAL 0x0020
141
142struct pollfd {
143 int fd;
144 short int events;
145 short int revents;
146};
147
148/* for getdents64() */
149struct linux_dirent64 {
150 uint64_t d_ino;
151 int64_t d_off;
152 unsigned short d_reclen;
153 unsigned char d_type;
154 char d_name[];
155};
156
157/* needed by wait4() */
158struct rusage {
159 struct timeval ru_utime;
160 struct timeval ru_stime;
161 long ru_maxrss;
162 long ru_ixrss;
163 long ru_idrss;
164 long ru_isrss;
165 long ru_minflt;
166 long ru_majflt;
167 long ru_nswap;
168 long ru_inblock;
169 long ru_oublock;
170 long ru_msgsnd;
171 long ru_msgrcv;
172 long ru_nsignals;
173 long ru_nvcsw;
174 long ru_nivcsw;
175};
176
177/* The format of the struct as returned by the libc to the application, which
178 * significantly differs from the format returned by the stat() syscall flavours.
179 */
180struct stat {
181 dev_t st_dev; /* ID of device containing file */
182 ino_t st_ino; /* inode number */
183 mode_t st_mode; /* protection */
184 nlink_t st_nlink; /* number of hard links */
185 uid_t st_uid; /* user ID of owner */
186 gid_t st_gid; /* group ID of owner */
187 dev_t st_rdev; /* device ID (if special file) */
188 off_t st_size; /* total size, in bytes */
189 blksize_t st_blksize; /* blocksize for file system I/O */
190 blkcnt_t st_blocks; /* number of 512B blocks allocated */
191 time_t st_atime; /* time of last access */
192 time_t st_mtime; /* time of last modification */
193 time_t st_ctime; /* time of last status change */
194};
195
196/* WARNING, it only deals with the 4096 first majors and 256 first minors */
197#define makedev(major, minor) ((dev_t)((((major) & 0xfff) << 8) | ((minor) & 0xff)))
198#define major(dev) ((unsigned int)(((dev) >> 8) & 0xfff))
199#define minor(dev) ((unsigned int)(((dev) & 0xff))
200
201#ifndef offsetof
202#define offsetof(TYPE, FIELD) ((size_t) &((TYPE *)0)->FIELD)
203#endif
204
205#ifndef container_of
206#define container_of(PTR, TYPE, FIELD) ({ \
207 __typeof__(((TYPE *)0)->FIELD) *__FIELD_PTR = (PTR); \
208 (TYPE *)((char *) __FIELD_PTR - offsetof(TYPE, FIELD)); \
209})
210#endif
211
212/* make sure to include all global symbols */
213#include "nolibc.h"
214
215#endif /* _NOLIBC_TYPES_H */