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55abdd1f5e
After the nolibc includes were split to facilitate portability from standard libcs, programs that include only what they need may miss some symbols which are needed by libgcc. This is the case for raise() which is needed by the divide by zero code in some architectures for example. Regardless, being able to include only the apparently needed files is convenient. Instead of trying to move all exported definitions to a single file, since this can change over time, this patch takes another approach consisting in including the nolibc header at the end of all standard include files. This way their types and functions are already known at the moment of inclusion, and including any single one of them is sufficient to bring all the required ones. Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
215 lines
5.8 KiB
C
215 lines
5.8 KiB
C
/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
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/*
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* Special types used by various syscalls for NOLIBC
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* Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>
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*/
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#ifndef _NOLIBC_TYPES_H
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#define _NOLIBC_TYPES_H
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#include "std.h"
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#include <linux/time.h>
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/* Only the generic macros and types may be defined here. The arch-specific
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* ones such as the O_RDONLY and related macros used by fcntl() and open(), or
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* the layout of sys_stat_struct must not be defined here.
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*/
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/* stat flags (WARNING, octal here) */
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#define S_IFDIR 0040000
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#define S_IFCHR 0020000
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#define S_IFBLK 0060000
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#define S_IFREG 0100000
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#define S_IFIFO 0010000
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#define S_IFLNK 0120000
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#define S_IFSOCK 0140000
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#define S_IFMT 0170000
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#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
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#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)
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#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)
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#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
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#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)
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#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
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#define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
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/* dirent types */
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#define DT_UNKNOWN 0x0
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#define DT_FIFO 0x1
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#define DT_CHR 0x2
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#define DT_DIR 0x4
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#define DT_BLK 0x6
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#define DT_REG 0x8
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#define DT_LNK 0xa
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#define DT_SOCK 0xc
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/* commonly an fd_set represents 256 FDs */
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#ifndef FD_SETSIZE
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#define FD_SETSIZE 256
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#endif
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/* PATH_MAX and MAXPATHLEN are often used and found with plenty of different
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* values.
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*/
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#ifndef PATH_MAX
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#define PATH_MAX 4096
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#endif
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#ifndef MAXPATHLEN
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#define MAXPATHLEN (PATH_MAX)
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#endif
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/* Special FD used by all the *at functions */
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#ifndef AT_FDCWD
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#define AT_FDCWD (-100)
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#endif
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/* whence values for lseek() */
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#define SEEK_SET 0
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#define SEEK_CUR 1
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#define SEEK_END 2
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/* cmd for reboot() */
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#define LINUX_REBOOT_MAGIC1 0xfee1dead
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#define LINUX_REBOOT_MAGIC2 0x28121969
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#define LINUX_REBOOT_CMD_HALT 0xcdef0123
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#define LINUX_REBOOT_CMD_POWER_OFF 0x4321fedc
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#define LINUX_REBOOT_CMD_RESTART 0x01234567
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#define LINUX_REBOOT_CMD_SW_SUSPEND 0xd000fce2
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/* Macros used on waitpid()'s return status */
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#define WEXITSTATUS(status) (((status) & 0xff00) >> 8)
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#define WIFEXITED(status) (((status) & 0x7f) == 0)
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/* waitpid() flags */
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#define WNOHANG 1
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/* standard exit() codes */
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#define EXIT_SUCCESS 0
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#define EXIT_FAILURE 1
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#define FD_SETIDXMASK (8 * sizeof(unsigned long))
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#define FD_SETBITMASK (8 * sizeof(unsigned long)-1)
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/* for select() */
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typedef struct {
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unsigned long fds[(FD_SETSIZE + FD_SETBITMASK) / FD_SETIDXMASK];
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} fd_set;
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#define FD_CLR(fd, set) do { \
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fd_set *__set = (set); \
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int __fd = (fd); \
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if (__fd >= 0) \
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__set->fds[__fd / FD_SETIDXMASK] &= \
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~(1U << (__fd & FX_SETBITMASK)); \
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} while (0)
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#define FD_SET(fd, set) do { \
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fd_set *__set = (set); \
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int __fd = (fd); \
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if (__fd >= 0) \
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__set->fds[__fd / FD_SETIDXMASK] |= \
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1 << (__fd & FD_SETBITMASK); \
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} while (0)
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#define FD_ISSET(fd, set) ({ \
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fd_set *__set = (set); \
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int __fd = (fd); \
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int __r = 0; \
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if (__fd >= 0) \
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__r = !!(__set->fds[__fd / FD_SETIDXMASK] & \
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1U << (__fd & FD_SET_BITMASK)); \
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__r; \
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})
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#define FD_ZERO(set) do { \
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fd_set *__set = (set); \
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int __idx; \
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int __size = (FD_SETSIZE+FD_SETBITMASK) / FD_SETIDXMASK;\
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for (__idx = 0; __idx < __size; __idx++) \
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__set->fds[__idx] = 0; \
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} while (0)
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/* for poll() */
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#define POLLIN 0x0001
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#define POLLPRI 0x0002
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#define POLLOUT 0x0004
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#define POLLERR 0x0008
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#define POLLHUP 0x0010
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#define POLLNVAL 0x0020
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struct pollfd {
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int fd;
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short int events;
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short int revents;
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};
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/* for getdents64() */
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struct linux_dirent64 {
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uint64_t d_ino;
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int64_t d_off;
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unsigned short d_reclen;
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unsigned char d_type;
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char d_name[];
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};
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/* needed by wait4() */
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struct rusage {
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struct timeval ru_utime;
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struct timeval ru_stime;
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long ru_maxrss;
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long ru_ixrss;
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long ru_idrss;
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long ru_isrss;
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long ru_minflt;
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long ru_majflt;
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long ru_nswap;
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long ru_inblock;
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long ru_oublock;
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long ru_msgsnd;
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long ru_msgrcv;
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long ru_nsignals;
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long ru_nvcsw;
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long ru_nivcsw;
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};
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/* The format of the struct as returned by the libc to the application, which
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* significantly differs from the format returned by the stat() syscall flavours.
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*/
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struct stat {
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dev_t st_dev; /* ID of device containing file */
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ino_t st_ino; /* inode number */
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mode_t st_mode; /* protection */
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nlink_t st_nlink; /* number of hard links */
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uid_t st_uid; /* user ID of owner */
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gid_t st_gid; /* group ID of owner */
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dev_t st_rdev; /* device ID (if special file) */
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off_t st_size; /* total size, in bytes */
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blksize_t st_blksize; /* blocksize for file system I/O */
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blkcnt_t st_blocks; /* number of 512B blocks allocated */
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time_t st_atime; /* time of last access */
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time_t st_mtime; /* time of last modification */
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time_t st_ctime; /* time of last status change */
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};
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/* WARNING, it only deals with the 4096 first majors and 256 first minors */
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#define makedev(major, minor) ((dev_t)((((major) & 0xfff) << 8) | ((minor) & 0xff)))
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#define major(dev) ((unsigned int)(((dev) >> 8) & 0xfff))
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#define minor(dev) ((unsigned int)(((dev) & 0xff))
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#ifndef offsetof
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#define offsetof(TYPE, FIELD) ((size_t) &((TYPE *)0)->FIELD)
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#endif
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#ifndef container_of
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#define container_of(PTR, TYPE, FIELD) ({ \
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__typeof__(((TYPE *)0)->FIELD) *__FIELD_PTR = (PTR); \
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(TYPE *)((char *) __FIELD_PTR - offsetof(TYPE, FIELD)); \
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})
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#endif
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/* make sure to include all global symbols */
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#include "nolibc.h"
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#endif /* _NOLIBC_TYPES_H */
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