204 lines
6.3 KiB
C
204 lines
6.3 KiB
C
/****************************************************************************
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* include/unistd.h
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*
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* Copyright (C) 2007-2009, 2013-2014 Gregory Nutt. All rights 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 R_OK 1 /* Test read permission */
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#define W_OK 2 /* Test write permission */
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#define X_OK 4 /* Test execute 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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#undef _POSIX_ASYNCHRONOUS_IO
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#undef _POSIX_PRIORITIZED_IO
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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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#define fdatasync(f) fsync(f)
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/****************************************************************************
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* Global Variables
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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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* Global 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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/* 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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/* Memory management */
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#ifdef CONFIG_ARCH_ADDRENV
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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 unlink(FAR const char *pathname);
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int rmdir(FAR const char *pathname);
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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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/* Non-standard functions to manage symbol tables */
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struct symtab_s; /* See include/nuttx/binfmt/symtab.h */
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void exec_getsymtab(FAR const struct symtab_s **symtab, FAR int *nsymbols);
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void exec_setsymtab(FAR const struct symtab_s *symtab, int nsymbols);
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#endif
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/* Other */
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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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int *getoptindp(void); /* Index into argv */
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int *getoptoptp(void); /* unrecognized option character */
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#define access(...) (0)
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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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