05b68e14b1
Many headers are expected to expose a subset of the type definitions
in time.h. time.h has a whole bunch of messy logic for conditionally
defining some its types and structs, but, as best I can tell, this
has never worked 100%. In particular, __need_timespec is ineffective
if _TIME_H has already been defined, which means that if you compile
#include <time.h>
#include <sched.h>
with e.g. -fsyntax-only -std=c89 -Wall -Wsystem-headers, you will get
In file included from test.c:2:0:
/usr/include/sched.h:74:57: warning: "struct timespec" declared inside
parameter list will not be visible outside of this definition or declaration
extern int sched_rr_get_interval (__pid_t __pid, struct timespec *__t) __THROW;
^~~~~~~~
And if you want to _use_ sched_rr_get_interval in a TU compiled that
way, you're hosed.
This patch replaces all of that with small bits/types/TYPE.h headers
as introduced earlier. time.h and bits/time.h are now *much* simpler,
and a lot of other headers are slightly simpler.
* time/time.h, bits/time.h, sysdeps/unix/sysv/linux/bits/time.h:
Remove all logic conditional on __need macros. Move all the
conditionally defined types to their own headers...
* time/bits/types/clock_t.h: Define clock_t here.
* time/bits/types/clockid_t.h: Define clockid_t here.
* time/bits/types/struct_itimerspec.h: Define struct itimerspec here.
* time/bits/types/struct_timespec.h: Define struct timespec here.
* time/bits/types/struct_timeval.h: Define struct timeval here.
* time/bits/types/struct_tm.h: Define struct tm here.
* time/bits/types/time_t.h: Define time_t here.
* time/bits/types/timer_t.h: Define timer_t here.
* time/Makefile: Install the new headers.
* bits/resource.h, io/fcntl.h, io/sys/poll.h, io/sys/stat.h
* io/utime.h, misc/sys/select.h, posix/sched.h, posix/sys/times.h
* posix/sys/types.h, resolv/netdb.h, rt/aio.h, rt/mqueue.h
* signal/signal.h, pthread/semaphore.h, sysdeps/nptl/pthread.h
* sysdeps/unix/sysv/linux/alpha/bits/resource.h
* sysdeps/unix/sysv/linux/alpha/sys/acct.h
* sysdeps/unix/sysv/linux/bits/resource.h
* sysdeps/unix/sysv/linux/bits/timex.h
* sysdeps/unix/sysv/linux/mips/bits/resource.h
* sysdeps/unix/sysv/linux/net/ppp_defs.h
* sysdeps/unix/sysv/linux/sparc/bits/resource.h
* sysdeps/unix/sysv/linux/sys/acct.h
* sysdeps/unix/sysv/linux/sys/timerfd.h
* sysvipc/sys/msg.h, sysvipc/sys/sem.h, sysvipc/sys/shm.h
* time/sys/time.h, time/sys/timeb.h
Use the new bits/types headers.
* include/time.h: Remove __need logic.
* include/bits/time.h
* include/bits/types/clock_t.h, include/bits/types/clockid_t.h
* include/bits/types/time_t.h, include/bits/types/timer_t.h
* include/bits/types/struct_itimerspec.h
* include/bits/types/struct_timespec.h
* include/bits/types/struct_timeval.h
* include/bits/types/struct_tm.h:
New wrapper headers.
319 lines
10 KiB
C
319 lines
10 KiB
C
/* Copyright (C) 1991-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/*
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* POSIX Standard: 6.5 File Control Operations <fcntl.h>
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*/
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#ifndef _FCNTL_H
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#define _FCNTL_H 1
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#include <features.h>
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/* This must be early so <bits/fcntl.h> can define types winningly. */
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__BEGIN_DECLS
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/* Get __mode_t, __dev_t and __off_t .*/
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#include <bits/types.h>
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/* Get the definitions of O_*, F_*, FD_*: all the
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numbers and flag bits for `open', `fcntl', et al. */
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#include <bits/fcntl.h>
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/* Detect if open needs mode as a third argument (or for openat as a fourth
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argument). */
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#ifdef __O_TMPFILE
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# define __OPEN_NEEDS_MODE(oflag) \
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(((oflag) & O_CREAT) != 0 || ((oflag) & __O_TMPFILE) == __O_TMPFILE)
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#else
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# define __OPEN_NEEDS_MODE(oflag) (((oflag) & O_CREAT) != 0)
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#endif
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/* POSIX.1-2001 specifies that these types are defined by <fcntl.h>.
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Earlier POSIX standards permitted any type ending in `_t' to be defined
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by any POSIX header, so we don't conditionalize the definitions here. */
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#ifndef __mode_t_defined
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typedef __mode_t mode_t;
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# define __mode_t_defined
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#endif
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#ifndef __off_t_defined
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# ifndef __USE_FILE_OFFSET64
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typedef __off_t off_t;
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# else
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typedef __off64_t off_t;
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# endif
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# define __off_t_defined
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#endif
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#if defined __USE_LARGEFILE64 && !defined __off64_t_defined
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typedef __off64_t off64_t;
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# define __off64_t_defined
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#endif
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#ifndef __pid_t_defined
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typedef __pid_t pid_t;
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# define __pid_t_defined
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#endif
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/* For XPG all symbols from <sys/stat.h> should also be available. */
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#ifdef __USE_XOPEN2K8
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# include <bits/types/struct_timespec.h>
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#endif
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#if defined __USE_XOPEN || defined __USE_XOPEN2K8
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# include <bits/stat.h>
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# define S_IFMT __S_IFMT
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# define S_IFDIR __S_IFDIR
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# define S_IFCHR __S_IFCHR
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# define S_IFBLK __S_IFBLK
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# define S_IFREG __S_IFREG
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# ifdef __S_IFIFO
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# define S_IFIFO __S_IFIFO
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# endif
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# ifdef __S_IFLNK
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# define S_IFLNK __S_IFLNK
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# endif
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# if (defined __USE_UNIX98 || defined __USE_XOPEN2K8) && defined __S_IFSOCK
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# define S_IFSOCK __S_IFSOCK
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# endif
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/* Protection bits. */
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# define S_ISUID __S_ISUID /* Set user ID on execution. */
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# define S_ISGID __S_ISGID /* Set group ID on execution. */
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# if defined __USE_MISC || defined __USE_XOPEN
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/* Save swapped text after use (sticky bit). This is pretty well obsolete. */
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# define S_ISVTX __S_ISVTX
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# endif
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# define S_IRUSR __S_IREAD /* Read by owner. */
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# define S_IWUSR __S_IWRITE /* Write by owner. */
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# define S_IXUSR __S_IEXEC /* Execute by owner. */
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/* Read, write, and execute by owner. */
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# define S_IRWXU (__S_IREAD|__S_IWRITE|__S_IEXEC)
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# define S_IRGRP (S_IRUSR >> 3) /* Read by group. */
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# define S_IWGRP (S_IWUSR >> 3) /* Write by group. */
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# define S_IXGRP (S_IXUSR >> 3) /* Execute by group. */
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/* Read, write, and execute by group. */
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# define S_IRWXG (S_IRWXU >> 3)
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# define S_IROTH (S_IRGRP >> 3) /* Read by others. */
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# define S_IWOTH (S_IWGRP >> 3) /* Write by others. */
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# define S_IXOTH (S_IXGRP >> 3) /* Execute by others. */
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/* Read, write, and execute by others. */
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# define S_IRWXO (S_IRWXG >> 3)
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#endif
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#ifdef __USE_MISC
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# ifndef R_OK /* Verbatim from <unistd.h>. Ugh. */
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/* Values for the second argument to access.
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These may be OR'd together. */
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# define R_OK 4 /* Test for read permission. */
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# define W_OK 2 /* Test for write permission. */
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# define X_OK 1 /* Test for execute permission. */
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# define F_OK 0 /* Test for existence. */
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# endif
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#endif /* Use misc. */
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/* XPG wants the following symbols. <stdio.h> has the same definitions. */
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#if defined __USE_XOPEN || defined __USE_XOPEN2K8
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# define SEEK_SET 0 /* Seek from beginning of file. */
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# define SEEK_CUR 1 /* Seek from current position. */
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# define SEEK_END 2 /* Seek from end of file. */
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#endif /* XPG */
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/* The constants AT_REMOVEDIR and AT_EACCESS have the same value. AT_EASSESS
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is meaningful only to faccessat, while AT_REMOVEDIR is meaningful only to
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unlinkat. The two functions do completely different things and therefore,
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the flags can be allowed to overlap. For example, passing AT_REMOVEDIR to
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faccessat would be undefined behavior and thus treating it equivalent to
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AT_EACCESS is valid undefined behavior. */
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#ifdef __USE_ATFILE
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# define AT_FDCWD -100 /* Special value used to indicate
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the *at functions should use the
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current working directory. */
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# define AT_SYMLINK_NOFOLLOW 0x100 /* Do not follow symbolic links. */
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# define AT_REMOVEDIR 0x200 /* Remove directory instead of
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unlinking file. */
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# define AT_SYMLINK_FOLLOW 0x400 /* Follow symbolic links. */
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# ifdef __USE_GNU
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# define AT_NO_AUTOMOUNT 0x800 /* Suppress terminal automount
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traversal. */
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# define AT_EMPTY_PATH 0x1000 /* Allow empty relative pathname. */
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# endif
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# define AT_EACCESS 0x200 /* Test access permitted for
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effective IDs, not real IDs. */
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#endif
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/* Do the file control operation described by CMD on FD.
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The remaining arguments are interpreted depending on CMD.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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extern int fcntl (int __fd, int __cmd, ...);
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/* Open FILE and return a new file descriptor for it, or -1 on error.
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OFLAG determines the type of access used. If O_CREAT or O_TMPFILE is set
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in OFLAG, the third argument is taken as a `mode_t', the mode of the
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created file.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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#ifndef __USE_FILE_OFFSET64
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extern int open (const char *__file, int __oflag, ...) __nonnull ((1));
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#else
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# ifdef __REDIRECT
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extern int __REDIRECT (open, (const char *__file, int __oflag, ...), open64)
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__nonnull ((1));
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# else
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# define open open64
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# endif
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#endif
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#ifdef __USE_LARGEFILE64
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extern int open64 (const char *__file, int __oflag, ...) __nonnull ((1));
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#endif
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#ifdef __USE_ATFILE
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/* Similar to `open' but a relative path name is interpreted relative to
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the directory for which FD is a descriptor.
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NOTE: some other `openat' implementation support additional functionality
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through this interface, especially using the O_XATTR flag. This is not
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yet supported here.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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# ifndef __USE_FILE_OFFSET64
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extern int openat (int __fd, const char *__file, int __oflag, ...)
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__nonnull ((2));
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# else
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# ifdef __REDIRECT
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extern int __REDIRECT (openat, (int __fd, const char *__file, int __oflag,
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...), openat64) __nonnull ((2));
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# else
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# define openat openat64
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# endif
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# endif
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# ifdef __USE_LARGEFILE64
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extern int openat64 (int __fd, const char *__file, int __oflag, ...)
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__nonnull ((2));
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# endif
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#endif
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/* Create and open FILE, with mode MODE. This takes an `int' MODE
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argument because that is what `mode_t' will be widened to.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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#ifndef __USE_FILE_OFFSET64
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extern int creat (const char *__file, mode_t __mode) __nonnull ((1));
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#else
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# ifdef __REDIRECT
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extern int __REDIRECT (creat, (const char *__file, mode_t __mode),
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creat64) __nonnull ((1));
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# else
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# define creat creat64
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# endif
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#endif
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#ifdef __USE_LARGEFILE64
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extern int creat64 (const char *__file, mode_t __mode) __nonnull ((1));
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#endif
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#if !defined F_LOCK && (defined __USE_MISC || (defined __USE_XOPEN_EXTENDED \
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&& !defined __USE_POSIX))
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/* NOTE: These declarations also appear in <unistd.h>; be sure to keep both
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files consistent. Some systems have them there and some here, and some
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software depends on the macros being defined without including both. */
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/* `lockf' is a simpler interface to the locking facilities of `fcntl'.
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LEN is always relative to the current file position.
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The CMD argument is one of the following. */
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# define F_ULOCK 0 /* Unlock a previously locked region. */
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# define F_LOCK 1 /* Lock a region for exclusive use. */
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# define F_TLOCK 2 /* Test and lock a region for exclusive use. */
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# define F_TEST 3 /* Test a region for other processes locks. */
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# ifndef __USE_FILE_OFFSET64
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extern int lockf (int __fd, int __cmd, off_t __len);
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# else
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# ifdef __REDIRECT
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extern int __REDIRECT (lockf, (int __fd, int __cmd, __off64_t __len), lockf64);
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# else
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# define lockf lockf64
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# endif
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# endif
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# ifdef __USE_LARGEFILE64
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extern int lockf64 (int __fd, int __cmd, off64_t __len);
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# endif
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#endif
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#ifdef __USE_XOPEN2K
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/* Advice the system about the expected behaviour of the application with
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respect to the file associated with FD. */
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# ifndef __USE_FILE_OFFSET64
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extern int posix_fadvise (int __fd, off_t __offset, off_t __len,
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int __advise) __THROW;
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# else
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# ifdef __REDIRECT_NTH
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extern int __REDIRECT_NTH (posix_fadvise, (int __fd, __off64_t __offset,
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__off64_t __len, int __advise),
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posix_fadvise64);
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# else
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# define posix_fadvise posix_fadvise64
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# endif
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# endif
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# ifdef __USE_LARGEFILE64
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extern int posix_fadvise64 (int __fd, off64_t __offset, off64_t __len,
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int __advise) __THROW;
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# endif
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/* Reserve storage for the data of the file associated with FD.
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This function is a possible cancellation point and therefore not
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marked with __THROW. */
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# ifndef __USE_FILE_OFFSET64
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extern int posix_fallocate (int __fd, off_t __offset, off_t __len);
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# else
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# ifdef __REDIRECT
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extern int __REDIRECT (posix_fallocate, (int __fd, __off64_t __offset,
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__off64_t __len),
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posix_fallocate64);
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# else
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# define posix_fallocate posix_fallocate64
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# endif
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# endif
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# ifdef __USE_LARGEFILE64
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extern int posix_fallocate64 (int __fd, off64_t __offset, off64_t __len);
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# endif
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#endif
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/* Define some inlines helping to catch common problems. */
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#if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function \
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&& defined __va_arg_pack_len
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# include <bits/fcntl2.h>
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#endif
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__END_DECLS
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#endif /* fcntl.h */
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