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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 | #include <linux/wait.h> |
| 16 | #include <linux/resource.h> |
| 17 | |
| 18 | |
| 19 | /* Only the generic macros and types may be defined here. The arch-specific |
| 20 | * ones such as the O_RDONLY and related macros used by fcntl() and open() |
| 21 | * must not be defined here. |
| 22 | */ |
| 23 | |
| 24 | /* stat flags (WARNING, octal here). We need to check for an existing |
| 25 | * definition because linux/stat.h may omit to define those if it finds |
| 26 | * that any glibc header was already included. |
| 27 | */ |
| 28 | #if !defined(S_IFMT) |
| 29 | #define S_IFDIR 0040000 |
| 30 | #define S_IFCHR 0020000 |
| 31 | #define S_IFBLK 0060000 |
| 32 | #define S_IFREG 0100000 |
| 33 | #define S_IFIFO 0010000 |
| 34 | #define S_IFLNK 0120000 |
| 35 | #define S_IFSOCK 0140000 |
| 36 | #define S_IFMT 0170000 |
| 37 | |
| 38 | #define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR) |
| 39 | #define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR) |
| 40 | #define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK) |
| 41 | #define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG) |
| 42 | #define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO) |
| 43 | #define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK) |
| 44 | #define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK) |
| 45 | |
| 46 | #define S_IRWXU 00700 |
| 47 | #define S_IRUSR 00400 |
| 48 | #define S_IWUSR 00200 |
| 49 | #define S_IXUSR 00100 |
| 50 | |
| 51 | #define S_IRWXG 00070 |
| 52 | #define S_IRGRP 00040 |
| 53 | #define S_IWGRP 00020 |
| 54 | #define S_IXGRP 00010 |
| 55 | |
| 56 | #define S_IRWXO 00007 |
| 57 | #define S_IROTH 00004 |
| 58 | #define S_IWOTH 00002 |
| 59 | #define S_IXOTH 00001 |
| 60 | #endif |
| 61 | |
| 62 | /* dirent types */ |
| 63 | #define DT_UNKNOWN 0x0 |
| 64 | #define DT_FIFO 0x1 |
| 65 | #define DT_CHR 0x2 |
| 66 | #define DT_DIR 0x4 |
| 67 | #define DT_BLK 0x6 |
| 68 | #define DT_REG 0x8 |
| 69 | #define DT_LNK 0xa |
| 70 | #define DT_SOCK 0xc |
| 71 | |
| 72 | /* commonly an fd_set represents 256 FDs */ |
| 73 | #ifndef FD_SETSIZE |
| 74 | #define FD_SETSIZE 256 |
| 75 | #endif |
| 76 | |
| 77 | /* PATH_MAX and MAXPATHLEN are often used and found with plenty of different |
| 78 | * values. |
| 79 | */ |
| 80 | #ifndef PATH_MAX |
| 81 | #define PATH_MAX 4096 |
| 82 | #endif |
| 83 | |
| 84 | #ifndef MAXPATHLEN |
| 85 | #define MAXPATHLEN (PATH_MAX) |
| 86 | #endif |
| 87 | |
| 88 | /* flags for mmap */ |
| 89 | #ifndef MAP_FAILED |
| 90 | #define MAP_FAILED ((void *)-1) |
| 91 | #endif |
| 92 | |
| 93 | /* whence values for lseek() */ |
| 94 | #define SEEK_SET 0 |
| 95 | #define SEEK_CUR 1 |
| 96 | #define SEEK_END 2 |
| 97 | |
| 98 | /* flags for reboot */ |
| 99 | #define RB_AUTOBOOT LINUX_REBOOT_CMD_RESTART |
| 100 | #define RB_HALT_SYSTEM LINUX_REBOOT_CMD_HALT |
| 101 | #define RB_ENABLE_CAD LINUX_REBOOT_CMD_CAD_ON |
| 102 | #define RB_DISABLE_CAD LINUX_REBOOT_CMD_CAD_OFF |
| 103 | #define RB_POWER_OFF LINUX_REBOOT_CMD_POWER_OFF |
| 104 | #define RB_SW_SUSPEND LINUX_REBOOT_CMD_SW_SUSPEND |
| 105 | #define RB_KEXEC LINUX_REBOOT_CMD_KEXEC |
| 106 | |
| 107 | /* Macros used on waitpid()'s return status */ |
| 108 | #define WEXITSTATUS(status) (((status) & 0xff00) >> 8) |
| 109 | #define WIFEXITED(status) (((status) & 0x7f) == 0) |
| 110 | #define WTERMSIG(status) ((status) & 0x7f) |
| 111 | #define WIFSIGNALED(status) ((status) - 1 < 0xff) |
| 112 | |
| 113 | /* standard exit() codes */ |
| 114 | #define EXIT_SUCCESS 0 |
| 115 | #define EXIT_FAILURE 1 |
| 116 | |
| 117 | #define FD_SETIDXMASK (8 * sizeof(unsigned long)) |
| 118 | #define FD_SETBITMASK (8 * sizeof(unsigned long)-1) |
| 119 | |
| 120 | /* for select() */ |
| 121 | typedef struct { |
| 122 | unsigned long fds[(FD_SETSIZE + FD_SETBITMASK) / FD_SETIDXMASK]; |
| 123 | } fd_set; |
| 124 | |
| 125 | #define FD_CLR(fd, set) do { \ |
| 126 | fd_set *__set = (set); \ |
| 127 | int __fd = (fd); \ |
| 128 | if (__fd >= 0) \ |
| 129 | __set->fds[__fd / FD_SETIDXMASK] &= \ |
| 130 | ~(1U << (__fd & FX_SETBITMASK)); \ |
| 131 | } while (0) |
| 132 | |
| 133 | #define FD_SET(fd, set) do { \ |
| 134 | fd_set *__set = (set); \ |
| 135 | int __fd = (fd); \ |
| 136 | if (__fd >= 0) \ |
| 137 | __set->fds[__fd / FD_SETIDXMASK] |= \ |
| 138 | 1 << (__fd & FD_SETBITMASK); \ |
| 139 | } while (0) |
| 140 | |
| 141 | #define FD_ISSET(fd, set) ({ \ |
| 142 | fd_set *__set = (set); \ |
| 143 | int __fd = (fd); \ |
| 144 | int __r = 0; \ |
| 145 | if (__fd >= 0) \ |
| 146 | __r = !!(__set->fds[__fd / FD_SETIDXMASK] & \ |
| 147 | 1U << (__fd & FD_SET_BITMASK)); \ |
| 148 | __r; \ |
| 149 | }) |
| 150 | |
| 151 | #define FD_ZERO(set) do { \ |
| 152 | fd_set *__set = (set); \ |
| 153 | int __idx; \ |
| 154 | int __size = (FD_SETSIZE+FD_SETBITMASK) / FD_SETIDXMASK;\ |
| 155 | for (__idx = 0; __idx < __size; __idx++) \ |
| 156 | __set->fds[__idx] = 0; \ |
| 157 | } while (0) |
| 158 | |
| 159 | /* for poll() */ |
| 160 | #define POLLIN 0x0001 |
| 161 | #define POLLPRI 0x0002 |
| 162 | #define POLLOUT 0x0004 |
| 163 | #define POLLERR 0x0008 |
| 164 | #define POLLHUP 0x0010 |
| 165 | #define POLLNVAL 0x0020 |
| 166 | |
| 167 | struct pollfd { |
| 168 | int fd; |
| 169 | short int events; |
| 170 | short int revents; |
| 171 | }; |
| 172 | |
| 173 | /* for getdents64() */ |
| 174 | struct linux_dirent64 { |
| 175 | uint64_t d_ino; |
| 176 | int64_t d_off; |
| 177 | unsigned short d_reclen; |
| 178 | unsigned char d_type; |
| 179 | char d_name[]; |
| 180 | }; |
| 181 | |
| 182 | /* The format of the struct as returned by the libc to the application, which |
| 183 | * significantly differs from the format returned by the stat() syscall flavours. |
| 184 | */ |
| 185 | struct stat { |
| 186 | dev_t st_dev; /* ID of device containing file */ |
| 187 | ino_t st_ino; /* inode number */ |
| 188 | mode_t st_mode; /* protection */ |
| 189 | nlink_t st_nlink; /* number of hard links */ |
| 190 | uid_t st_uid; /* user ID of owner */ |
| 191 | gid_t st_gid; /* group ID of owner */ |
| 192 | dev_t st_rdev; /* device ID (if special file) */ |
| 193 | off_t st_size; /* total size, in bytes */ |
| 194 | blksize_t st_blksize; /* blocksize for file system I/O */ |
| 195 | blkcnt_t st_blocks; /* number of 512B blocks allocated */ |
| 196 | union { time_t st_atime; struct timespec st_atim; }; /* time of last access */ |
| 197 | union { time_t st_mtime; struct timespec st_mtim; }; /* time of last modification */ |
| 198 | union { time_t st_ctime; struct timespec st_ctim; }; /* time of last status change */ |
| 199 | }; |
| 200 | |
| 201 | /* WARNING, it only deals with the 4096 first majors and 256 first minors */ |
| 202 | #define makedev(major, minor) ((dev_t)((((major) & 0xfff) << 8) | ((minor) & 0xff))) |
| 203 | #define major(dev) ((unsigned int)(((dev) >> 8) & 0xfff)) |
| 204 | #define minor(dev) ((unsigned int)(((dev) & 0xff)) |
| 205 | |
| 206 | #ifndef offsetof |
| 207 | #define offsetof(TYPE, FIELD) ((size_t) &((TYPE *)0)->FIELD) |
| 208 | #endif |
| 209 | |
| 210 | #ifndef container_of |
| 211 | #define container_of(PTR, TYPE, FIELD) ({ \ |
| 212 | __typeof__(((TYPE *)0)->FIELD) *__FIELD_PTR = (PTR); \ |
| 213 | (TYPE *)((char *) __FIELD_PTR - offsetof(TYPE, FIELD)); \ |
| 214 | }) |
| 215 | #endif |
| 216 | |
| 217 | /* make sure to include all global symbols */ |
| 218 | #include "nolibc.h" |
| 219 | |
| 220 | #endif /* _NOLIBC_TYPES_H */ |
| 221 |
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