audk/StdLib/Include/sys/unistd.h

/*  $NetBSD: unistd.h,v 1.35 2006/08/14 18:17:48 rpaulo Exp $ */

/*
 * Copyright (c) 1989, 1993
 *  The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *  @(#)unistd.h  8.2 (Berkeley) 1/7/94
 */

#ifndef _SYS_UNISTD_H_
#define _SYS_UNISTD_H_

#include <sys/featuretest.h>

/* compile-time symbolic constants */
#define _POSIX_JOB_CONTROL  /* implementation supports job control */

/*
 * According to POSIX 1003.1:
 * "The saved set-user-ID capability allows a program to regain the
 * effective user ID established at the last exec call."
 * However, the setuid/setgid function as specified by POSIX 1003.1 does
 * not allow changing the effective ID from the super-user without also
 * changed the saved ID, so it is impossible to get super-user privileges
 * back later.  Instead we provide this feature independent of the current
 * effective ID through the seteuid/setegid function.  In addition, we do
 * not use the saved ID as specified by POSIX 1003.1 in setuid/setgid,
 * because this would make it impossible for a set-user-ID executable
 * owned by a user other than the super-user to permanently revoke its
 * extra privileges.
 */
#ifdef  _NOT_AVAILABLE
#define _POSIX_SAVED_IDS  /* saved set-user-ID and set-group-ID */
#endif

#define _POSIX_VERSION    199009L
#define _POSIX2_VERSION   199212L

/* execution-time symbolic constants */
        /* chown requires appropriate privileges */
#define _POSIX_CHOWN_RESTRICTED 1
        /* clock selection */
#define _POSIX_CLOCK_SELECTION  -1
        /* too-long path components generate errors */
#define _POSIX_NO_TRUNC   1
        /* may disable terminal special characters */
#define _POSIX_VDISABLE   ((unsigned char)'\377')
        /* file synchronization is available */
#define _POSIX_FSYNC    1
        /* synchronized I/O is available */
#define _POSIX_SYNCHRONIZED_IO  1
        /* memory mapped files */
#define _POSIX_MAPPED_FILES 1
        /* memory locking of whole address space */
#define _POSIX_MEMLOCK    1
        /* memory locking address ranges */
#define _POSIX_MEMLOCK_RANGE  1
        /* memory access protections */
#define _POSIX_MEMORY_PROTECTION 1
        /* monotonic clock */
#define _POSIX_MONOTONIC_CLOCK  200112L
        /* threads */
#define _POSIX_THREADS    200112L
        /* semaphores */
#define _POSIX_SEMAPHORES 0
        /* barriers */
#define _POSIX_BARRIERS   200112L
        /* timers */
#define _POSIX_TIMERS   200112L
        /* spin locks */
#define _POSIX_SPIN_LOCKS 200112L
        /* read/write locks */
#define _POSIX_READER_WRITER_LOCKS  200112L
        /* XPG4.2 shared memory */
#define _XOPEN_SHM    0

#if defined(_NETBSD_SOURCE)
/* whence values for lseek(2); renamed by POSIX 1003.1 */
#define L_SET   SEEK_SET
#define L_INCR    SEEK_CUR
#define L_XTND    SEEK_END

/*
 * fsync_range values.
 *
 * Note the following flag values were chosen to not overlap
 * values for SEEK_XXX flags.  While not currently implemented,
 * it is possible to extend this call to respect SEEK_CUR and
 * SEEK_END offset addressing modes.
 */
#define FDATASYNC 0x0010  /* sync data and minimal metadata */
#define FFILESYNC 0x0020  /* sync data and metadata */
#define FDISKSYNC 0x0040  /* flush disk caches after sync */
#endif

/* configurable pathname variables; use as argument to pathconf(3) */
#define _PC_LINK_MAX     1
#define _PC_MAX_CANON    2
#define _PC_MAX_INPUT    3
#define _PC_NAME_MAX     4
#define _PC_PATH_MAX     5
#define _PC_PIPE_BUF     6
#define _PC_CHOWN_RESTRICTED   7
#define _PC_NO_TRUNC     8
#define _PC_VDISABLE     9
#define _PC_SYNC_IO   10
#define _PC_FILESIZEBITS  11

/* configurable system variables; use as argument to sysconf(3) */
/*
 * XXX The value of _SC_CLK_TCK is embedded in <time.h>.
 * XXX The value of _SC_PAGESIZE is embedded in <sys/shm.h>.
 */
#define _SC_ARG_MAX    1
#define _SC_CHILD_MAX    2
#define _O_SC_CLK_TCK    3 /* Old version, always 100 */
#define _SC_NGROUPS_MAX    4
#define _SC_OPEN_MAX     5
#define _SC_JOB_CONTROL    6
#define _SC_SAVED_IDS    7
#define _SC_VERSION    8
#define _SC_BC_BASE_MAX    9
#define _SC_BC_DIM_MAX    10
#define _SC_BC_SCALE_MAX  11
#define _SC_BC_STRING_MAX 12
#define _SC_COLL_WEIGHTS_MAX  13
#define _SC_EXPR_NEST_MAX 14
#define _SC_LINE_MAX    15
#define _SC_RE_DUP_MAX    16
#define _SC_2_VERSION   17
#define _SC_2_C_BIND    18
#define _SC_2_C_DEV   19
#define _SC_2_CHAR_TERM   20
#define _SC_2_FORT_DEV    21
#define _SC_2_FORT_RUN    22
#define _SC_2_LOCALEDEF   23
#define _SC_2_SW_DEV    24
#define _SC_2_UPE   25
#define _SC_STREAM_MAX    26
#define _SC_TZNAME_MAX    27
#define _SC_PAGESIZE    28
#define _SC_PAGE_SIZE   _SC_PAGESIZE  /* 1170 compatibility */
#define _SC_FSYNC   29
#define _SC_XOPEN_SHM   30
#define _SC_SYNCHRONIZED_IO 31
#define _SC_IOV_MAX   32
#define _SC_MAPPED_FILES  33
#define _SC_MEMLOCK   34
#define _SC_MEMLOCK_RANGE 35
#define _SC_MEMORY_PROTECTION 36
#define _SC_LOGIN_NAME_MAX  37
#define _SC_MONOTONIC_CLOCK 38
#define _SC_CLK_TCK   39 /* New, variable version */
#define _SC_ATEXIT_MAX    40
#define _SC_THREADS   41
#define _SC_SEMAPHORES    42
#define _SC_BARRIERS    43
#define _SC_TIMERS    44
#define _SC_SPIN_LOCKS    45
#define _SC_READER_WRITER_LOCKS 46
#define _SC_GETGR_R_SIZE_MAX  47
#define _SC_GETPW_R_SIZE_MAX  48
#define _SC_CLOCK_SELECTION 49

/* configurable system strings */
#define _CS_PATH     1

#endif /* !_SYS_UNISTD_H_ */