summaryrefslogtreecommitdiffstats
path: root/tools/include/nolibc/types.h
blob: 959997034e553a1cefa2e920209c5132e2e75048 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
/*
 * Special types used by various syscalls for NOLIBC
 * Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>
 */

#ifndef _NOLIBC_TYPES_H
#define _NOLIBC_TYPES_H

#include "std.h"
#include <linux/time.h>


/* Only the generic macros and types may be defined here. The arch-specific
 * ones such as the O_RDONLY and related macros used by fcntl() and open(), or
 * the layout of sys_stat_struct must not be defined here.
 */

/* stat flags (WARNING, octal here) */
#define S_IFDIR        0040000
#define S_IFCHR        0020000
#define S_IFBLK        0060000
#define S_IFREG        0100000
#define S_IFIFO        0010000
#define S_IFLNK        0120000
#define S_IFSOCK       0140000
#define S_IFMT         0170000

#define S_ISDIR(mode)  (((mode) & S_IFDIR)  == S_IFDIR)
#define S_ISCHR(mode)  (((mode) & S_IFCHR)  == S_IFCHR)
#define S_ISBLK(mode)  (((mode) & S_IFBLK)  == S_IFBLK)
#define S_ISREG(mode)  (((mode) & S_IFREG)  == S_IFREG)
#define S_ISFIFO(mode) (((mode) & S_IFIFO)  == S_IFIFO)
#define S_ISLNK(mode)  (((mode) & S_IFLNK)  == S_IFLNK)
#define S_ISSOCK(mode) (((mode) & S_IFSOCK) == S_IFSOCK)

/* dirent types */
#define DT_UNKNOWN     0x0
#define DT_FIFO        0x1
#define DT_CHR         0x2
#define DT_DIR         0x4
#define DT_BLK         0x6
#define DT_REG         0x8
#define DT_LNK         0xa
#define DT_SOCK        0xc

/* commonly an fd_set represents 256 FDs */
#ifndef FD_SETSIZE
#define FD_SETSIZE     256
#endif

/* PATH_MAX and MAXPATHLEN are often used and found with plenty of different
 * values.
 */
#ifndef PATH_MAX
#define PATH_MAX       4096
#endif

#ifndef MAXPATHLEN
#define MAXPATHLEN     (PATH_MAX)
#endif

/* Special FD used by all the *at functions */
#ifndef AT_FDCWD
#define AT_FDCWD       (-100)
#endif

/* whence values for lseek() */
#define SEEK_SET       0
#define SEEK_CUR       1
#define SEEK_END       2

/* cmd for reboot() */
#define LINUX_REBOOT_MAGIC1         0xfee1dead
#define LINUX_REBOOT_MAGIC2         0x28121969
#define LINUX_REBOOT_CMD_HALT       0xcdef0123
#define LINUX_REBOOT_CMD_POWER_OFF  0x4321fedc
#define LINUX_REBOOT_CMD_RESTART    0x01234567
#define LINUX_REBOOT_CMD_SW_SUSPEND 0xd000fce2

/* Macros used on waitpid()'s return status */
#define WEXITSTATUS(status) (((status) & 0xff00) >> 8)
#define WIFEXITED(status)   (((status) & 0x7f) == 0)

/* waitpid() flags */
#define WNOHANG      1

/* standard exit() codes */
#define EXIT_SUCCESS 0
#define EXIT_FAILURE 1

/* for select() */
typedef struct {
	uint32_t fd32[(FD_SETSIZE + 31) / 32];
} fd_set;

#define FD_CLR(fd, set) do {                                            \
		fd_set *__set = (set);                                  \
		int __fd = (fd);                                        \
		if (__fd >= 0)                                          \
			__set->fd32[__fd / 32] &= ~(1U << (__fd & 31)); \
	} while (0)

#define FD_SET(fd, set) do {                                            \
		fd_set *__set = (set);                                  \
		int __fd = (fd);                                        \
		if (__fd >= 0)                                          \
			__set->fd32[__fd / 32] |= 1U << (__fd & 31);    \
	} while (0)

#define FD_ISSET(fd, set) ({                                                  \
		fd_set *__set = (set);                                        \
		int __fd = (fd);                                              \
		int __r = 0;                                                  \
		if (__fd >= 0)                                                \
			__r = !!(__set->fd32[__fd / 32] & 1U << (__fd & 31)); \
		__r;                                                          \
	})

#define FD_ZERO(set) do {                                               \
		fd_set *__set = (set);                                  \
		int __idx;                                              \
		for (__idx = 0; __idx < (FD_SETSIZE+31) / 32; __idx ++) \
			__set->fd32[__idx] = 0;                         \
	} while (0)

/* for poll() */
#define POLLIN          0x0001
#define POLLPRI         0x0002
#define POLLOUT         0x0004
#define POLLERR         0x0008
#define POLLHUP         0x0010
#define POLLNVAL        0x0020

struct pollfd {
	int fd;
	short int events;
	short int revents;
};

/* for getdents64() */
struct linux_dirent64 {
	uint64_t       d_ino;
	int64_t        d_off;
	unsigned short d_reclen;
	unsigned char  d_type;
	char           d_name[];
};

/* needed by wait4() */
struct rusage {
	struct timeval ru_utime;
	struct timeval ru_stime;
	long   ru_maxrss;
	long   ru_ixrss;
	long   ru_idrss;
	long   ru_isrss;
	long   ru_minflt;
	long   ru_majflt;
	long   ru_nswap;
	long   ru_inblock;
	long   ru_oublock;
	long   ru_msgsnd;
	long   ru_msgrcv;
	long   ru_nsignals;
	long   ru_nvcsw;
	long   ru_nivcsw;
};

/* The format of the struct as returned by the libc to the application, which
 * significantly differs from the format returned by the stat() syscall flavours.
 */
struct stat {
	dev_t     st_dev;     /* ID of device containing file */
	ino_t     st_ino;     /* inode number */
	mode_t    st_mode;    /* protection */
	nlink_t   st_nlink;   /* number of hard links */
	uid_t     st_uid;     /* user ID of owner */
	gid_t     st_gid;     /* group ID of owner */
	dev_t     st_rdev;    /* device ID (if special file) */
	off_t     st_size;    /* total size, in bytes */
	blksize_t st_blksize; /* blocksize for file system I/O */
	blkcnt_t  st_blocks;  /* number of 512B blocks allocated */
	time_t    st_atime;   /* time of last access */
	time_t    st_mtime;   /* time of last modification */
	time_t    st_ctime;   /* time of last status change */
};

/* WARNING, it only deals with the 4096 first majors and 256 first minors */
#define makedev(major, minor) ((dev_t)((((major) & 0xfff) << 8) | ((minor) & 0xff)))
#define major(dev) ((unsigned int)(((dev) >> 8) & 0xfff))
#define minor(dev) ((unsigned int)(((dev) & 0xff))

#ifndef offsetof
#define offsetof(TYPE, FIELD) ((size_t) &((TYPE *)0)->FIELD)
#endif

#ifndef container_of
#define container_of(PTR, TYPE, FIELD) ({			\
	__typeof__(((TYPE *)0)->FIELD) *__FIELD_PTR = (PTR);	\
	(TYPE *)((char *) __FIELD_PTR - offsetof(TYPE, FIELD));	\
})
#endif

#endif /* _NOLIBC_TYPES_H */