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 /* make sure to include all global symbols */ 8 #include "nolibc.h" 9 10 #ifndef _NOLIBC_TYPES_H 11 #define _NOLIBC_TYPES_H 12 13 #include "std.h" 14 #include <linux/mman.h> 15 #include <linux/stat.h> 16 #include <linux/time.h> 17 #include <linux/wait.h> 18 19 20 /* Only the generic macros and types may be defined here. The arch-specific 21 * ones such as the O_RDONLY and related macros used by fcntl() and open() 22 * must not be defined here. 23 */ 24 25 /* stat flags (WARNING, octal here). We need to check for an existing 26 * definition because linux/stat.h may omit to define those if it finds 27 * that any glibc header was already included. 28 */ 29 #if !defined(S_IFMT) 30 #define S_IFDIR 0040000 31 #define S_IFCHR 0020000 32 #define S_IFBLK 0060000 33 #define S_IFREG 0100000 34 #define S_IFIFO 0010000 35 #define S_IFLNK 0120000 36 #define S_IFSOCK 0140000 37 #define S_IFMT 0170000 38 39 #define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR) 40 #define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR) 41 #define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK) 42 #define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG) 43 #define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO) 44 #define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK) 45 #define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK) 46 47 #define S_IRWXU 00700 48 #define S_IRUSR 00400 49 #define S_IWUSR 00200 50 #define S_IXUSR 00100 51 52 #define S_IRWXG 00070 53 #define S_IRGRP 00040 54 #define S_IWGRP 00020 55 #define S_IXGRP 00010 56 57 #define S_IRWXO 00007 58 #define S_IROTH 00004 59 #define S_IWOTH 00002 60 #define S_IXOTH 00001 61 #endif 62 63 /* dirent types */ 64 #define DT_UNKNOWN 0x0 65 #define DT_FIFO 0x1 66 #define DT_CHR 0x2 67 #define DT_DIR 0x4 68 #define DT_BLK 0x6 69 #define DT_REG 0x8 70 #define DT_LNK 0xa 71 #define DT_SOCK 0xc 72 73 /* commonly an fd_set represents 256 FDs */ 74 #ifndef FD_SETSIZE 75 #define FD_SETSIZE 256 76 #endif 77 78 /* PATH_MAX and MAXPATHLEN are often used and found with plenty of different 79 * values. 80 */ 81 #ifndef PATH_MAX 82 #define PATH_MAX 4096 83 #endif 84 85 #ifndef MAXPATHLEN 86 #define MAXPATHLEN (PATH_MAX) 87 #endif 88 89 /* flags for mmap */ 90 #ifndef MAP_FAILED 91 #define MAP_FAILED ((void *)-1) 92 #endif 93 94 /* whence values for lseek() */ 95 #define SEEK_SET 0 96 #define SEEK_CUR 1 97 #define SEEK_END 2 98 99 /* flags for reboot */ 100 #define RB_AUTOBOOT LINUX_REBOOT_CMD_RESTART 101 #define RB_HALT_SYSTEM LINUX_REBOOT_CMD_HALT 102 #define RB_ENABLE_CAD LINUX_REBOOT_CMD_CAD_ON 103 #define RB_DISABLE_CAD LINUX_REBOOT_CMD_CAD_OFF 104 #define RB_POWER_OFF LINUX_REBOOT_CMD_POWER_OFF 105 #define RB_SW_SUSPEND LINUX_REBOOT_CMD_SW_SUSPEND 106 #define RB_KEXEC LINUX_REBOOT_CMD_KEXEC 107 108 /* Macros used on waitpid()'s return status */ 109 #define WEXITSTATUS(status) (((status) & 0xff00) >> 8) 110 #define WIFEXITED(status) (((status) & 0x7f) == 0) 111 #define WTERMSIG(status) ((status) & 0x7f) 112 #define WIFSIGNALED(status) ((status) - 1 < 0xff) 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() */ 122 typedef 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] & \ 148 1U << (__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 getdents64() */ 161 struct linux_dirent64 { 162 uint64_t d_ino; 163 int64_t d_off; 164 unsigned short d_reclen; 165 unsigned char d_type; 166 char d_name[]; 167 }; 168 169 /* The format of the struct as returned by the libc to the application, which 170 * significantly differs from the format returned by the stat() syscall flavours. 171 */ 172 struct stat { 173 dev_t st_dev; /* ID of device containing file */ 174 ino_t st_ino; /* inode number */ 175 mode_t st_mode; /* protection */ 176 nlink_t st_nlink; /* number of hard links */ 177 uid_t st_uid; /* user ID of owner */ 178 gid_t st_gid; /* group ID of owner */ 179 dev_t st_rdev; /* device ID (if special file) */ 180 off_t st_size; /* total size, in bytes */ 181 blksize_t st_blksize; /* blocksize for file system I/O */ 182 blkcnt_t st_blocks; /* number of 512B blocks allocated */ 183 union { time_t st_atime; struct timespec st_atim; }; /* time of last access */ 184 union { time_t st_mtime; struct timespec st_mtim; }; /* time of last modification */ 185 union { time_t st_ctime; struct timespec st_ctim; }; /* time of last status change */ 186 }; 187 188 typedef __kernel_clockid_t clockid_t; 189 typedef int timer_t; 190 191 #ifndef container_of 192 #define container_of(PTR, TYPE, FIELD) ({ \ 193 __typeof__(((TYPE *)0)->FIELD) *__FIELD_PTR = (PTR); \ 194 (TYPE *)((char *) __FIELD_PTR - offsetof(TYPE, FIELD)); \ 195 }) 196 #endif 197 198 #endif /* _NOLIBC_TYPES_H */ 199