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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#include <linux/stat.h>
13
14
15/* Only the generic macros and types may be defined here. The arch-specific
16 * ones such as the O_RDONLY and related macros used by fcntl() and open(), or
17 * the layout of sys_stat_struct must not be defined here.
18 */
19
20/* stat flags (WARNING, octal here). We need to check for an existing
21 * definition because linux/stat.h may omit to define those if it finds
22 * that any glibc header was already included.
23 */
24#if !defined(S_IFMT)
25#define S_IFDIR 0040000
26#define S_IFCHR 0020000
27#define S_IFBLK 0060000
28#define S_IFREG 0100000
29#define S_IFIFO 0010000
30#define S_IFLNK 0120000
31#define S_IFSOCK 0140000
32#define S_IFMT 0170000
33
34#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
35#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)
36#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)
37#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
38#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)
39#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
40#define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
41
42#define S_IRWXU 00700
43#define S_IRUSR 00400
44#define S_IWUSR 00200
45#define S_IXUSR 00100
46
47#define S_IRWXG 00070
48#define S_IRGRP 00040
49#define S_IWGRP 00020
50#define S_IXGRP 00010
51
52#define S_IRWXO 00007
53#define S_IROTH 00004
54#define S_IWOTH 00002
55#define S_IXOTH 00001
56#endif
57
58/* dirent types */
59#define DT_UNKNOWN 0x0
60#define DT_FIFO 0x1
61#define DT_CHR 0x2
62#define DT_DIR 0x4
63#define DT_BLK 0x6
64#define DT_REG 0x8
65#define DT_LNK 0xa
66#define DT_SOCK 0xc
67
68/* commonly an fd_set represents 256 FDs */
69#ifndef FD_SETSIZE
70#define FD_SETSIZE 256
71#endif
72
73/* PATH_MAX and MAXPATHLEN are often used and found with plenty of different
74 * values.
75 */
76#ifndef PATH_MAX
77#define PATH_MAX 4096
78#endif
79
80#ifndef MAXPATHLEN
81#define MAXPATHLEN (PATH_MAX)
82#endif
83
84/* whence values for lseek() */
85#define SEEK_SET 0
86#define SEEK_CUR 1
87#define SEEK_END 2
88
89/* Macros used on waitpid()'s return status */
90#define WEXITSTATUS(status) (((status) & 0xff00) >> 8)
91#define WIFEXITED(status) (((status) & 0x7f) == 0)
92#define WTERMSIG(status) ((status) & 0x7f)
93#define WIFSIGNALED(status) ((status) - 1 < 0xff)
94
95/* waitpid() flags */
96#define WNOHANG 1
97
98/* standard exit() codes */
99#define EXIT_SUCCESS 0
100#define EXIT_FAILURE 1
101
102#define FD_SETIDXMASK (8 * sizeof(unsigned long))
103#define FD_SETBITMASK (8 * sizeof(unsigned long)-1)
104
105/* for select() */
106typedef struct {
107 unsigned long fds[(FD_SETSIZE + FD_SETBITMASK) / FD_SETIDXMASK];
108} fd_set;
109
110#define FD_CLR(fd, set) do { \
111 fd_set *__set = (set); \
112 int __fd = (fd); \
113 if (__fd >= 0) \
114 __set->fds[__fd / FD_SETIDXMASK] &= \
115 ~(1U << (__fd & FX_SETBITMASK)); \
116 } while (0)
117
118#define FD_SET(fd, set) do { \
119 fd_set *__set = (set); \
120 int __fd = (fd); \
121 if (__fd >= 0) \
122 __set->fds[__fd / FD_SETIDXMASK] |= \
123 1 << (__fd & FD_SETBITMASK); \
124 } while (0)
125
126#define FD_ISSET(fd, set) ({ \
127 fd_set *__set = (set); \
128 int __fd = (fd); \
129 int __r = 0; \
130 if (__fd >= 0) \
131 __r = !!(__set->fds[__fd / FD_SETIDXMASK] & \
1321U << (__fd & FD_SET_BITMASK)); \
133 __r; \
134 })
135
136#define FD_ZERO(set) do { \
137 fd_set *__set = (set); \
138 int __idx; \
139 int __size = (FD_SETSIZE+FD_SETBITMASK) / FD_SETIDXMASK;\
140 for (__idx = 0; __idx < __size; __idx++) \
141 __set->fds[__idx] = 0; \
142 } while (0)
143
144/* for poll() */
145#define POLLIN 0x0001
146#define POLLPRI 0x0002
147#define POLLOUT 0x0004
148#define POLLERR 0x0008
149#define POLLHUP 0x0010
150#define POLLNVAL 0x0020
151
152struct pollfd {
153 int fd;
154 short int events;
155 short int revents;
156};
157
158/* for getdents64() */
159struct linux_dirent64 {
160 uint64_t d_ino;
161 int64_t d_off;
162 unsigned short d_reclen;
163 unsigned char d_type;
164 char d_name[];
165};
166
167/* needed by wait4() */
168struct rusage {
169 struct timeval ru_utime;
170 struct timeval ru_stime;
171 long ru_maxrss;
172 long ru_ixrss;
173 long ru_idrss;
174 long ru_isrss;
175 long ru_minflt;
176 long ru_majflt;
177 long ru_nswap;
178 long ru_inblock;
179 long ru_oublock;
180 long ru_msgsnd;
181 long ru_msgrcv;
182 long ru_nsignals;
183 long ru_nvcsw;
184 long ru_nivcsw;
185};
186
187/* The format of the struct as returned by the libc to the application, which
188 * significantly differs from the format returned by the stat() syscall flavours.
189 */
190struct stat {
191 dev_t st_dev; /* ID of device containing file */
192 ino_t st_ino; /* inode number */
193 mode_t st_mode; /* protection */
194 nlink_t st_nlink; /* number of hard links */
195 uid_t st_uid; /* user ID of owner */
196 gid_t st_gid; /* group ID of owner */
197 dev_t st_rdev; /* device ID (if special file) */
198 off_t st_size; /* total size, in bytes */
199 blksize_t st_blksize; /* blocksize for file system I/O */
200 blkcnt_t st_blocks; /* number of 512B blocks allocated */
201 union { time_t st_atime; struct timespec st_atim; }; /* time of last access */
202 union { time_t st_mtime; struct timespec st_mtim; }; /* time of last modification */
203 union { time_t st_ctime; struct timespec st_ctim; }; /* time of last status change */
204};
205
206/* WARNING, it only deals with the 4096 first majors and 256 first minors */
207#define makedev(major, minor) ((dev_t)((((major) & 0xfff) << 8) | ((minor) & 0xff)))
208#define major(dev) ((unsigned int)(((dev) >> 8) & 0xfff))
209#define minor(dev) ((unsigned int)(((dev) & 0xff))
210
211#ifndef offsetof
212#define offsetof(TYPE, FIELD) ((size_t) &((TYPE *)0)->FIELD)
213#endif
214
215#ifndef container_of
216#define container_of(PTR, TYPE, FIELD) ({ \
217 __typeof__(((TYPE *)0)->FIELD) *__FIELD_PTR = (PTR); \
218 (TYPE *)((char *) __FIELD_PTR - offsetof(TYPE, FIELD)); \
219})
220#endif
221
222/* make sure to include all global symbols */
223#include "nolibc.h"
224
225#endif /* _NOLIBC_TYPES_H */