/* 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 */
#define FD_SETSIZE     256

/* 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)


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

/* for poll() */
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 */
};

#endif /* _NOLIBC_TYPES_H */