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 13 14 /* Only the generic macros and types may be defined here. The arch-specific 15 * ones such as the O_RDONLY and related macros used by fcntl() and open(), or 16 * the layout of sys_stat_struct must not be defined here. 17 */ 18 19 /* stat flags (WARNING, octal here) */ 20 #define S_IFDIR 0040000 21 #define S_IFCHR 0020000 22 #define S_IFBLK 0060000 23 #define S_IFREG 0100000 24 #define S_IFIFO 0010000 25 #define S_IFLNK 0120000 26 #define S_IFSOCK 0140000 27 #define S_IFMT 0170000 28 29 #define S_ISDIR(mode) (((mode) & S_IFDIR) == S_IFDIR) 30 #define S_ISCHR(mode) (((mode) & S_IFCHR) == S_IFCHR) 31 #define S_ISBLK(mode) (((mode) & S_IFBLK) == S_IFBLK) 32 #define S_ISREG(mode) (((mode) & S_IFREG) == S_IFREG) 33 #define S_ISFIFO(mode) (((mode) & S_IFIFO) == S_IFIFO) 34 #define S_ISLNK(mode) (((mode) & S_IFLNK) == S_IFLNK) 35 #define S_ISSOCK(mode) (((mode) & S_IFSOCK) == S_IFSOCK) 36 37 /* dirent types */ 38 #define DT_UNKNOWN 0x0 39 #define DT_FIFO 0x1 40 #define DT_CHR 0x2 41 #define DT_DIR 0x4 42 #define DT_BLK 0x6 43 #define DT_REG 0x8 44 #define DT_LNK 0xa 45 #define DT_SOCK 0xc 46 47 /* commonly an fd_set represents 256 FDs */ 48 #ifndef FD_SETSIZE 49 #define FD_SETSIZE 256 50 #endif 51 52 /* PATH_MAX and MAXPATHLEN are often used and found with plenty of different 53 * values. 54 */ 55 #ifndef PATH_MAX 56 #define PATH_MAX 4096 57 #endif 58 59 #ifndef MAXPATHLEN 60 #define MAXPATHLEN (PATH_MAX) 61 #endif 62 63 /* Special FD used by all the *at functions */ 64 #ifndef AT_FDCWD 65 #define AT_FDCWD (-100) 66 #endif 67 68 /* whence values for lseek() */ 69 #define SEEK_SET 0 70 #define SEEK_CUR 1 71 #define SEEK_END 2 72 73 /* cmd for reboot() */ 74 #define LINUX_REBOOT_MAGIC1 0xfee1dead 75 #define LINUX_REBOOT_MAGIC2 0x28121969 76 #define LINUX_REBOOT_CMD_HALT 0xcdef0123 77 #define LINUX_REBOOT_CMD_POWER_OFF 0x4321fedc 78 #define LINUX_REBOOT_CMD_RESTART 0x01234567 79 #define LINUX_REBOOT_CMD_SW_SUSPEND 0xd000fce2 80 81 /* Macros used on waitpid()'s return status */ 82 #define WEXITSTATUS(status) (((status) & 0xff00) >> 8) 83 #define WIFEXITED(status) (((status) & 0x7f) == 0) 84 85 /* waitpid() flags */ 86 #define WNOHANG 1 87 88 /* standard exit() codes */ 89 #define EXIT_SUCCESS 0 90 #define EXIT_FAILURE 1 91 92 /* for select() */ 93 typedef struct { 94 uint32_t fd32[(FD_SETSIZE + 31) / 32]; 95 } fd_set; 96 97 #define FD_CLR(fd, set) do { \ 98 fd_set *__set = (set); \ 99 int __fd = (fd); \ 100 if (__fd >= 0) \ 101 __set->fd32[__fd / 32] &= ~(1U << (__fd & 31)); \ 102 } while (0) 103 104 #define FD_SET(fd, set) do { \ 105 fd_set *__set = (set); \ 106 int __fd = (fd); \ 107 if (__fd >= 0) \ 108 __set->fd32[__fd / 32] |= 1U << (__fd & 31); \ 109 } while (0) 110 111 #define FD_ISSET(fd, set) ({ \ 112 fd_set *__set = (set); \ 113 int __fd = (fd); \ 114 int __r = 0; \ 115 if (__fd >= 0) \ 116 __r = !!(__set->fd32[__fd / 32] & 1U << (__fd & 31)); \ 117 __r; \ 118 }) 119 120 #define FD_ZERO(set) do { \ 121 fd_set *__set = (set); \ 122 int __idx; \ 123 for (__idx = 0; __idx < (FD_SETSIZE+31) / 32; __idx ++) \ 124 __set->fd32[__idx] = 0; \ 125 } while (0) 126 127 /* for poll() */ 128 #define POLLIN 0x0001 129 #define POLLPRI 0x0002 130 #define POLLOUT 0x0004 131 #define POLLERR 0x0008 132 #define POLLHUP 0x0010 133 #define POLLNVAL 0x0020 134 135 struct pollfd { 136 int fd; 137 short int events; 138 short int revents; 139 }; 140 141 /* for getdents64() */ 142 struct linux_dirent64 { 143 uint64_t d_ino; 144 int64_t d_off; 145 unsigned short d_reclen; 146 unsigned char d_type; 147 char d_name[]; 148 }; 149 150 /* needed by wait4() */ 151 struct rusage { 152 struct timeval ru_utime; 153 struct timeval ru_stime; 154 long ru_maxrss; 155 long ru_ixrss; 156 long ru_idrss; 157 long ru_isrss; 158 long ru_minflt; 159 long ru_majflt; 160 long ru_nswap; 161 long ru_inblock; 162 long ru_oublock; 163 long ru_msgsnd; 164 long ru_msgrcv; 165 long ru_nsignals; 166 long ru_nvcsw; 167 long ru_nivcsw; 168 }; 169 170 /* The format of the struct as returned by the libc to the application, which 171 * significantly differs from the format returned by the stat() syscall flavours. 172 */ 173 struct stat { 174 dev_t st_dev; /* ID of device containing file */ 175 ino_t st_ino; /* inode number */ 176 mode_t st_mode; /* protection */ 177 nlink_t st_nlink; /* number of hard links */ 178 uid_t st_uid; /* user ID of owner */ 179 gid_t st_gid; /* group ID of owner */ 180 dev_t st_rdev; /* device ID (if special file) */ 181 off_t st_size; /* total size, in bytes */ 182 blksize_t st_blksize; /* blocksize for file system I/O */ 183 blkcnt_t st_blocks; /* number of 512B blocks allocated */ 184 time_t st_atime; /* time of last access */ 185 time_t st_mtime; /* time of last modification */ 186 time_t st_ctime; /* time of last status change */ 187 }; 188 189 /* WARNING, it only deals with the 4096 first majors and 256 first minors */ 190 #define makedev(major, minor) ((dev_t)((((major) & 0xfff) << 8) | ((minor) & 0xff))) 191 #define major(dev) ((unsigned int)(((dev) >> 8) & 0xfff)) 192 #define minor(dev) ((unsigned int)(((dev) & 0xff)) 193 194 #ifndef offsetof 195 #define offsetof(TYPE, FIELD) ((size_t) &((TYPE *)0)->FIELD) 196 #endif 197 198 #ifndef container_of 199 #define container_of(PTR, TYPE, FIELD) ({ \ 200 __typeof__(((TYPE *)0)->FIELD) *__FIELD_PTR = (PTR); \ 201 (TYPE *)((char *) __FIELD_PTR - offsetof(TYPE, FIELD)); \ 202 }) 203 #endif 204 205 #endif /* _NOLIBC_TYPES_H */ 206