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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/mman.h>
12#include <linux/reboot.h> /* for LINUX_REBOOT_* */
13#include <linux/stat.h>
14#include <linux/time.h>
15
16
17/* Only the generic macros and types may be defined here. The arch-specific
18 * ones such as the O_RDONLY and related macros used by fcntl() and open()
19 * must not be defined here.
20 */
21
22/* stat flags (WARNING, octal here). We need to check for an existing
23 * definition because linux/stat.h may omit to define those if it finds
24 * that any glibc header was already included.
25 */
26#if !defined(S_IFMT)
27#define S_IFDIR 0040000
28#define S_IFCHR 0020000
29#define S_IFBLK 0060000
30#define S_IFREG 0100000
31#define S_IFIFO 0010000
32#define S_IFLNK 0120000
33#define S_IFSOCK 0140000
34#define S_IFMT 0170000
35
36#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
37#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)
38#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)
39#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
40#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)
41#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
42#define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
43
44#define S_IRWXU 00700
45#define S_IRUSR 00400
46#define S_IWUSR 00200
47#define S_IXUSR 00100
48
49#define S_IRWXG 00070
50#define S_IRGRP 00040
51#define S_IWGRP 00020
52#define S_IXGRP 00010
53
54#define S_IRWXO 00007
55#define S_IROTH 00004
56#define S_IWOTH 00002
57#define S_IXOTH 00001
58#endif
59
60/* dirent types */
61#define DT_UNKNOWN 0x0
62#define DT_FIFO 0x1
63#define DT_CHR 0x2
64#define DT_DIR 0x4
65#define DT_BLK 0x6
66#define DT_REG 0x8
67#define DT_LNK 0xa
68#define DT_SOCK 0xc
69
70/* commonly an fd_set represents 256 FDs */
71#ifndef FD_SETSIZE
72#define FD_SETSIZE 256
73#endif
74
75/* PATH_MAX and MAXPATHLEN are often used and found with plenty of different
76 * values.
77 */
78#ifndef PATH_MAX
79#define PATH_MAX 4096
80#endif
81
82#ifndef MAXPATHLEN
83#define MAXPATHLEN (PATH_MAX)
84#endif
85
86/* flags for mmap */
87#ifndef MAP_FAILED
88#define MAP_FAILED ((void *)-1)
89#endif
90
91/* whence values for lseek() */
92#define SEEK_SET 0
93#define SEEK_CUR 1
94#define SEEK_END 2
95
96/* flags for reboot */
97#define RB_AUTOBOOT LINUX_REBOOT_CMD_RESTART
98#define RB_HALT_SYSTEM LINUX_REBOOT_CMD_HALT
99#define RB_ENABLE_CAD LINUX_REBOOT_CMD_CAD_ON
100#define RB_DISABLE_CAD LINUX_REBOOT_CMD_CAD_OFF
101#define RB_POWER_OFF LINUX_REBOOT_CMD_POWER_OFF
102#define RB_SW_SUSPEND LINUX_REBOOT_CMD_SW_SUSPEND
103#define RB_KEXEC LINUX_REBOOT_CMD_KEXEC
104
105/* Macros used on waitpid()'s return status */
106#define WEXITSTATUS(status) (((status) & 0xff00) >> 8)
107#define WIFEXITED(status) (((status) & 0x7f) == 0)
108#define WTERMSIG(status) ((status) & 0x7f)
109#define WIFSIGNALED(status) ((status) - 1 < 0xff)
110
111/* waitpid() flags */
112#define WNOHANG 1
113
114/* standard exit() codes */
115#define EXIT_SUCCESS 0
116#define EXIT_FAILURE 1
117
118#define FD_SETIDXMASK (8 * sizeof(unsigned long))
119#define FD_SETBITMASK (8 * sizeof(unsigned long)-1)
120
121/* for select() */
122typedef struct {
123 unsigned long fds[(FD_SETSIZE + FD_SETBITMASK) / FD_SETIDXMASK];
124} fd_set;
125
126#define FD_CLR(fd, set) do { \
127 fd_set *__set = (set); \
128 int __fd = (fd); \
129 if (__fd >= 0) \
130 __set->fds[__fd / FD_SETIDXMASK] &= \
131 ~(1U << (__fd & FX_SETBITMASK)); \
132 } while (0)
133
134#define FD_SET(fd, set) do { \
135 fd_set *__set = (set); \
136 int __fd = (fd); \
137 if (__fd >= 0) \
138 __set->fds[__fd / FD_SETIDXMASK] |= \
139 1 << (__fd & FD_SETBITMASK); \
140 } while (0)
141
142#define FD_ISSET(fd, set) ({ \
143 fd_set *__set = (set); \
144 int __fd = (fd); \
145 int __r = 0; \
146 if (__fd >= 0) \
147 __r = !!(__set->fds[__fd / FD_SETIDXMASK] & \
1481U << (__fd & FD_SET_BITMASK)); \
149 __r; \
150 })
151
152#define FD_ZERO(set) do { \
153 fd_set *__set = (set); \
154 int __idx; \
155 int __size = (FD_SETSIZE+FD_SETBITMASK) / FD_SETIDXMASK;\
156 for (__idx = 0; __idx < __size; __idx++) \
157 __set->fds[__idx] = 0; \
158 } while (0)
159
160/* for poll() */
161#define POLLIN 0x0001
162#define POLLPRI 0x0002
163#define POLLOUT 0x0004
164#define POLLERR 0x0008
165#define POLLHUP 0x0010
166#define POLLNVAL 0x0020
167
168struct pollfd {
169 int fd;
170 short int events;
171 short int revents;
172};
173
174/* for getdents64() */
175struct linux_dirent64 {
176 uint64_t d_ino;
177 int64_t d_off;
178 unsigned short d_reclen;
179 unsigned char d_type;
180 char d_name[];
181};
182
183/* needed by wait4() */
184struct rusage {
185 struct timeval ru_utime;
186 struct timeval ru_stime;
187 long ru_maxrss;
188 long ru_ixrss;
189 long ru_idrss;
190 long ru_isrss;
191 long ru_minflt;
192 long ru_majflt;
193 long ru_nswap;
194 long ru_inblock;
195 long ru_oublock;
196 long ru_msgsnd;
197 long ru_msgrcv;
198 long ru_nsignals;
199 long ru_nvcsw;
200 long ru_nivcsw;
201};
202
203/* The format of the struct as returned by the libc to the application, which
204 * significantly differs from the format returned by the stat() syscall flavours.
205 */
206struct stat {
207 dev_t st_dev; /* ID of device containing file */
208 ino_t st_ino; /* inode number */
209 mode_t st_mode; /* protection */
210 nlink_t st_nlink; /* number of hard links */
211 uid_t st_uid; /* user ID of owner */
212 gid_t st_gid; /* group ID of owner */
213 dev_t st_rdev; /* device ID (if special file) */
214 off_t st_size; /* total size, in bytes */
215 blksize_t st_blksize; /* blocksize for file system I/O */
216 blkcnt_t st_blocks; /* number of 512B blocks allocated */
217 union { time_t st_atime; struct timespec st_atim; }; /* time of last access */
218 union { time_t st_mtime; struct timespec st_mtim; }; /* time of last modification */
219 union { time_t st_ctime; struct timespec st_ctim; }; /* time of last status change */
220};
221
222/* WARNING, it only deals with the 4096 first majors and 256 first minors */
223#define makedev(major, minor) ((dev_t)((((major) & 0xfff) << 8) | ((minor) & 0xff)))
224#define major(dev) ((unsigned int)(((dev) >> 8) & 0xfff))
225#define minor(dev) ((unsigned int)(((dev) & 0xff))
226
227#ifndef offsetof
228#define offsetof(TYPE, FIELD) ((size_t) &((TYPE *)0)->FIELD)
229#endif
230
231#ifndef container_of
232#define container_of(PTR, TYPE, FIELD) ({ \
233 __typeof__(((TYPE *)0)->FIELD) *__FIELD_PTR = (PTR); \
234 (TYPE *)((char *) __FIELD_PTR - offsetof(TYPE, FIELD)); \
235})
236#endif
237
238/* make sure to include all global symbols */
239#include "nolibc.h"
240
241#endif /* _NOLIBC_TYPES_H */