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 #define FD_SETSIZE 256 49 50 /* Special FD used by all the *at functions */ 51 #ifndef AT_FDCWD 52 #define AT_FDCWD (-100) 53 #endif 54 55 /* whence values for lseek() */ 56 #define SEEK_SET 0 57 #define SEEK_CUR 1 58 #define SEEK_END 2 59 60 /* cmd for reboot() */ 61 #define LINUX_REBOOT_MAGIC1 0xfee1dead 62 #define LINUX_REBOOT_MAGIC2 0x28121969 63 #define LINUX_REBOOT_CMD_HALT 0xcdef0123 64 #define LINUX_REBOOT_CMD_POWER_OFF 0x4321fedc 65 #define LINUX_REBOOT_CMD_RESTART 0x01234567 66 #define LINUX_REBOOT_CMD_SW_SUSPEND 0xd000fce2 67 68 /* Macros used on waitpid()'s return status */ 69 #define WEXITSTATUS(status) (((status) & 0xff00) >> 8) 70 #define WIFEXITED(status) (((status) & 0x7f) == 0) 71 72 73 /* for select() */ 74 typedef struct { 75 uint32_t fd32[FD_SETSIZE / 32]; 76 } fd_set; 77 78 /* for poll() */ 79 struct pollfd { 80 int fd; 81 short int events; 82 short int revents; 83 }; 84 85 /* for getdents64() */ 86 struct linux_dirent64 { 87 uint64_t d_ino; 88 int64_t d_off; 89 unsigned short d_reclen; 90 unsigned char d_type; 91 char d_name[]; 92 }; 93 94 /* needed by wait4() */ 95 struct rusage { 96 struct timeval ru_utime; 97 struct timeval ru_stime; 98 long ru_maxrss; 99 long ru_ixrss; 100 long ru_idrss; 101 long ru_isrss; 102 long ru_minflt; 103 long ru_majflt; 104 long ru_nswap; 105 long ru_inblock; 106 long ru_oublock; 107 long ru_msgsnd; 108 long ru_msgrcv; 109 long ru_nsignals; 110 long ru_nvcsw; 111 long ru_nivcsw; 112 }; 113 114 /* The format of the struct as returned by the libc to the application, which 115 * significantly differs from the format returned by the stat() syscall flavours. 116 */ 117 struct stat { 118 dev_t st_dev; /* ID of device containing file */ 119 ino_t st_ino; /* inode number */ 120 mode_t st_mode; /* protection */ 121 nlink_t st_nlink; /* number of hard links */ 122 uid_t st_uid; /* user ID of owner */ 123 gid_t st_gid; /* group ID of owner */ 124 dev_t st_rdev; /* device ID (if special file) */ 125 off_t st_size; /* total size, in bytes */ 126 blksize_t st_blksize; /* blocksize for file system I/O */ 127 blkcnt_t st_blocks; /* number of 512B blocks allocated */ 128 time_t st_atime; /* time of last access */ 129 time_t st_mtime; /* time of last modification */ 130 time_t st_ctime; /* time of last status change */ 131 }; 132 133 #endif /* _NOLIBC_TYPES_H */ 134