384 lines
14 KiB
C
384 lines
14 KiB
C
/****************************************************************************
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* include/unistd.h
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*
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* Copyright (C) 2007-2009, 2013-2014, 2016-2018 Gregory Nutt. All rights
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* reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __INCLUDE_UNISTD_H
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#define __INCLUDE_UNISTD_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <sys/types.h>
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#include <nuttx/compiler.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* The number of functions that may be registered to be called
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* at program exit.
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*/
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#define ATEXIT_MAX 1
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/* Values for seeking */
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#define SEEK_SET 0 /* From the start of the file */
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#define SEEK_CUR 1 /* From the current file offset */
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#define SEEK_END 2 /* From the end of the file */
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/* Bit values for the second argument to access */
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#define F_OK 0 /* Test existence */
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#define X_OK 1 /* Test execute permission */
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#define W_OK 2 /* Test write permission */
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#define R_OK 4 /* Test read permission */
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/* POSIX feature set macros */
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#define POSIX_VERSION
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#undef _POSIX_SAVED_IDS
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#undef _POSIX_JOB_CONTROL
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#define _POSIX_REALTIME_SIGNALS 1
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#define _POSIX_MESSAGE_PASSING 1
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#undef _POSIX_MAPPED_FILES
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#undef _POSIX_SHARED_MEMORY_OBJECTS
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#define _POSIX_PRIORITY_SCHEDULING 1
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#define _POSIX_TIMERS 1
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#undef _POSIX_MEMLOCK
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#undef _POSIX_MEMLOCK_RANGE
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#undef _POSIX_FSYNC
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#define _POSIX_SYNCHRONIZED_IO 1
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#ifdef CONFIG_FS_AIO
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# define _POSIX_ASYNCHRONOUS_IO 1
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#else
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# undef _POSIX_ASYNCHRONOUS_IO
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#endif
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#undef _POSIX_PRIORITIZED_IO
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#ifdef CONFIG_SCHED_SPORADIC
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# define _POSIX_SPORADIC_SERVER 1
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# define _POSIX_THREAD_SPORADIC_SERVER 1
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#else
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# undef _POSIX_SPORADIC_SERVER
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# undef _POSIX_THREAD_SPORADIC_SERVER
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#endif
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/* Execution time constants (not supported) */
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#undef _POSIX_CHOWN_RESTRICTED
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#undef _POSIX_NO_TRUNC
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#undef _POSIX_VDISABLE
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#define _POSIX_SYNC_IO 1
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#undef _POSIX_ASYNC_IO
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#undef _POSIX_PRIO_IO
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/* Constants used with POSIX sysconf(). sysconf() will return -2 and set
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* errno to ENOSYS for most of these.
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*/
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#define _SC_2_C_BIND 0x0001
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#define _SC_2_C_DEV 0x0002
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#define _SC_2_CHAR_TERM 0x0003
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#define _SC_2_FORT_DEV 0x0004
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#define _SC_2_FORT_RUN 0x0005
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#define _SC_2_LOCALEDEF 0x0006
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#define _SC_2_PBS 0x0007
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#define _SC_2_PBS_ACCOUNTING 0x0008
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#define _SC_2_PBS_CHECKPOINT 0x0009
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#define _SC_2_PBS_LOCATE 0x000a
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#define _SC_2_PBS_MESSAGE 0x000b
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#define _SC_2_PBS_TRACK 0x000c
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#define _SC_2_SW_DEV 0x000d
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#define _SC_2_UPE 0x000e
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#define _SC_2_VERSION 0x000f
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#define _SC_ADVISORY_INFO 0x0010
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#define _SC_AIO_LISTIO_MAX 0x0011
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#define _SC_AIO_MAX 0x0012
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#define _SC_AIO_PRIO_DELTA_MAX 0x0013
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#define _SC_ARG_MAX 0x0014
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#define _SC_ASYNCHRONOUS_IO 0x0015
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#define _SC_ATEXIT_MAX 0x0016
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#define _SC_BARRIERS 0x0017
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#define _SC_BC_BASE_MAX 0x0018
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#define _SC_BC_DIM_MAX 0x0019
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#define _SC_BC_SCALE_MAX 0x001a
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#define _SC_BC_STRING_MAX 0x001b
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#define _SC_CHILD_MAX 0x001c
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#define _SC_CLK_TCK 0x001d
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#define _SC_CLOCK_SELECTION 0x001e
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#define _SC_COLL_WEIGHTS_MAX 0x001f
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#define _SC_CPUTIME 0x0020
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#define _SC_DELAYTIMER_MAX 0x0021
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#define _SC_EXPR_NEST_MAX 0x0022
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#define _SC_FSYNC 0x0023
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#define _SC_GETGR_R_SIZE_MAX 0x0024
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#define _SC_GETPW_R_SIZE_MAX 0x0025
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#define _SC_HOST_NAME_MAX 0x0026
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#define _SC_IOV_MAX 0x0027
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#define _SC_IPV6 0x0028
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#define _SC_JOB_CONTROL 0x0029
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#define _SC_LINE_MAX 0x002a
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#define _SC_LOGIN_NAME_MAX 0x002b
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#define _SC_MAPPED_FILES 0x002c
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#define _SC_MEMLOCK 0x002d
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#define _SC_MEMLOCK_RANGE 0x002e
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#define _SC_MEMORY_PROTECTION 0x002f
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#define _SC_MESSAGE_PASSING 0x0030
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#define _SC_MONOTONIC_CLOCK 0x0031
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#define _SC_MQ_OPEN_MAX 0x0032
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#define _SC_MQ_PRIO_MAX 0x0033
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#define _SC_NGROUPS_MAX 0x0034
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#define _SC_OPEN_MAX 0x0035
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#define _SC_PAGE_SIZE 0x0036
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#define _SC_PAGESIZE _SC_PAGE_SIZE
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#define _SC_PRIORITIZED_IO 0x0037
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#define _SC_PRIORITY_SCHEDULING 0x0038
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#define _SC_RAW_SOCKETS 0x0039
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#define _SC_RE_DUP_MAX 0x003a
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#define _SC_READER_WRITER_LOCKS 0x003b
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#define _SC_REALTIME_SIGNALS 0x003c
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#define _SC_REGEXP 0x003d
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#define _SC_RTSIG_MAX 0x003e
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#define _SC_SAVED_IDS 0x003f
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#define _SC_SEM_NSEMS_MAX 0x0040
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#define _SC_SEM_VALUE_MAX 0x0041
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#define _SC_SEMAPHORES 0x0042
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#define _SC_SHARED_MEMORY_OBJECTS 0x0043
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#define _SC_SHELL 0x0044
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#define _SC_SIGQUEUE_MAX 0x0045
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#define _SC_SPAWN 0x0046
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#define _SC_SPIN_LOCKS 0x0047
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#define _SC_SPORADIC_SERVER 0x0048
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#define _SC_SS_REPL_MAX 0x0049
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#define _SC_STREAM_MAX 0x004a
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#define _SC_SYMLOOP_MAX 0x004b
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#define _SC_SYNCHRONIZED_IO 0x004c
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#define _SC_THREAD_ATTR_STACKADDR 0x004d
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#define _SC_THREAD_ATTR_STACKSIZE 0x004e
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#define _SC_THREAD_CPUTIME 0x004f
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#define _SC_THREAD_DESTRUCTOR_ITERATIONS 0x0050
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#define _SC_THREAD_KEYS_MAX 0x0051
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#define _SC_THREAD_PRIO_INHERIT 0x0052
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#define _SC_THREAD_PRIO_PROTECT 0x0053
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#define _SC_THREAD_PRIORITY_SCHEDULING 0x0054
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#define _SC_THREAD_PROCESS_SHARED 0x0055
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#define _SC_THREAD_SAFE_FUNCTIONS 0x0056
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#define _SC_THREAD_SPORADIC_SERVER 0x0057
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#define _SC_THREAD_STACK_MIN 0x0058
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#define _SC_THREAD_THREADS_MAX 0x0059
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#define _SC_THREADS 0x005a
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#define _SC_TIMEOUTS 0x005b
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#define _SC_TIMER_MAX 0x005c
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#define _SC_TIMERS 0x005d
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#define _SC_TRACE 0x005e
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#define _SC_TRACE_EVENT_FILTER 0x005f
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#define _SC_TRACE_EVENT_NAME_MAX 0x0060
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#define _SC_TRACE_INHERIT 0x0061
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#define _SC_TRACE_LOG 0x0062
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#define _SC_TRACE_NAME_MAX 0x0063
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#define _SC_TRACE_SYS_MAX 0x0064
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#define _SC_TRACE_USER_EVENT_MAX 0x0065
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#define _SC_TTY_NAME_MAX 0x0066
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#define _SC_TYPED_MEMORY_OBJECTS 0x0067
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#define _SC_TZNAME_MAX 0x0068
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#define _SC_V6_ILP32_OFF32 0x0069
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#define _SC_V6_ILP32_OFFBIG 0x006a
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#define _SC_V6_LP64_OFF64 0x006b
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#define _SC_V6_LPBIG_OFFBIG 0x006c
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#define _SC_VERSION 0x006d
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#define _SC_XBS5_ILP32_OFF32 0x006e /* (LEGACY) */
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#define _SC_XBS5_ILP32_OFFBIG 0x006f /* (LEGACY) */
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#define _SC_XBS5_LP64_OFF64 0x0070 /* (LEGACY) */
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#define _SC_XBS5_LPBIG_OFFBIG 0x0071 /* (LEGACY) */
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#define _SC_XOPEN_CRYPT 0x0072
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#define _SC_XOPEN_ENH_I18N 0x0073
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#define _SC_XOPEN_LEGACY 0x0074
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#define _SC_XOPEN_REALTIME 0x0075
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#define _SC_XOPEN_REALTIME_THREADS 0x0076
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#define _SC_XOPEN_SHM 0x0077
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#define _SC_XOPEN_STREAMS 0x0078
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#define _SC_XOPEN_UNIX 0x0079
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#define _SC_XOPEN_VERSION 0x007a
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/* The following symbolic constants must be defined for file streams: */
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#define STDERR_FILENO 2 /* File number of stderr */
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#define STDIN_FILENO 0 /* File number of stdin */
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#define STDOUT_FILENO 1 /* File number of stdout */
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#define HOST_NAME_MAX 32
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/* Helpers and legacy compatibility definitions */
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#define fdatasync(f) fsync(f)
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#define getdtablesize(f) ((int)sysconf(_SC_OPEN_MAX))
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/* Used by getopt (obviously NOT thread safe!). These variables cannot be
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* accessed directly by an external NXFLAT module. In that case, accessor
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* functions must be used.
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*/
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#ifndef __NXFLAT__
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EXTERN FAR char *optarg; /* Optional argument following option */
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EXTERN int optind; /* Index into argv */
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EXTERN int optopt; /* Unrecognized option character */
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#else
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# define optarg (*(getoptargp()))
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# define optind (*(getoptindp()))
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# define optopt (*(getoptoptp()))
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/* Task Control Interfaces */
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pid_t vfork(void);
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pid_t getpid(void);
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void _exit(int status) noreturn_function;
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unsigned int sleep(unsigned int seconds);
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int usleep(useconds_t usec);
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int pause(void);
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int daemon(int nochdir, int noclose);
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/* File descriptor operations */
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int close(int fd);
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int dup(int fd);
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int dup2(int fd1, int fd2);
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int fsync(int fd);
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off_t lseek(int fd, off_t offset, int whence);
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ssize_t read(int fd, FAR void *buf, size_t nbytes);
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ssize_t write(int fd, FAR const void *buf, size_t nbytes);
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ssize_t pread(int fd, FAR void *buf, size_t nbytes, off_t offset);
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ssize_t pwrite(int fd, FAR const void *buf, size_t nbytes, off_t offset);
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int ftruncate(int fd, off_t length);
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/* Check if a file descriptor corresponds to a terminal I/O file */
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int isatty(int fd);
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/* Memory management */
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#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_MM_PGALLOC) && \
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defined(CONFIG_ARCH_USE_MMU)
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FAR void *sbrk(intptr_t incr);
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#endif
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/* Special devices */
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int pipe(int fd[2]);
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/* Working directory operations */
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int chdir(FAR const char *path);
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FAR char *getcwd(FAR char *buf, size_t size);
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/* File path operations */
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int access(FAR const char *path, int amode);
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int rmdir(FAR const char *pathname);
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int unlink(FAR const char *pathname);
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int truncate(FAR const char *path, off_t length);
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#ifdef CONFIG_PSEUDOFS_SOFTLINKS
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int link(FAR const char *path1, FAR const char *path2);
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ssize_t readlink(FAR const char *path, FAR char *buf, size_t bufsize);
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#endif
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/* Execution of programs from files */
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#ifdef CONFIG_LIBC_EXECFUNCS
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int execl(FAR const char *path, ...);
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int execv(FAR const char *path, FAR char *const argv[]);
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#endif
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/* Byte operations */
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void swab(FAR const void *src, FAR void *dest, ssize_t nbytes);
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/* getopt and friends */
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int getopt(int argc, FAR char *const argv[], FAR const char *optstring);
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/* Accessor functions intended for use only by external NXFLAT
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* modules. The global variables optarg, optind, and optopt cannot
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* be referenced directly from external modules.
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*/
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FAR char **getoptargp(void); /* Optional argument following option */
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FAR int *getoptindp(void); /* Index into argv */
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FAR int *getoptoptp(void); /* Unrecognized option character */
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int gethostname(FAR char *name, size_t size);
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int sethostname(FAR const char *name, size_t size);
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/* Get configurable system variables */
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long sysconf(int name);
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/* User and group identity management */
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int setuid(uid_t uid);
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uid_t getuid(void);
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int setgid(gid_t gid);
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gid_t getgid(void);
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __INCLUDE_UNISTD_H */
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