/**************************************************************************** * include/unistd.h * * Copyright (C) 2007-2009, 2013-2014 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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 NuttX 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 COPYRIGHT HOLDERS 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 * COPYRIGHT OWNER 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. * ****************************************************************************/ #ifndef __INCLUDE_UNISTD_H #define __INCLUDE_UNISTD_H /**************************************************************************** * Included Files ****************************************************************************/ #include #include /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* The number of functions that may be registered to be called * at program exit. */ #define ATEXIT_MAX 1 /* Values for seeking */ #define SEEK_SET 0 /* From the start of the file */ #define SEEK_CUR 1 /* From the current file offset */ #define SEEK_END 2 /* From the end of the file */ /* Bit values for the second argument to access */ #define F_OK 0 /* Test existence */ #define R_OK 1 /* Test read permission */ #define W_OK 2 /* Test write permission */ #define X_OK 4 /* Test execute permission */ /* POSIX feature set macros */ #define POSIX_VERSION #undef _POSIX_SAVED_IDS #undef _POSIX_JOB_CONTROL #define _POSIX_REALTIME_SIGNALS 1 #define _POSIX_MESSAGE_PASSING 1 #undef _POSIX_MAPPED_FILES #undef _POSIX_SHARED_MEMORY_OBJECTS #define _POSIX_PRIORITY_SCHEDULING 1 #define _POSIX_TIMERS 1 #undef _POSIX_MEMLOCK #undef _POSIX_MEMLOCK_RANGE #undef _POSIX_FSYNC #define _POSIX_SYNCHRONIZED_IO 1 #undef _POSIX_ASYNCHRONOUS_IO #undef _POSIX_PRIORITIZED_IO /* Execution time constants (not supported) */ #undef _POSIX_CHOWN_RESTRICTED #undef _POSIX_NO_TRUNC #undef _POSIX_VDISABLE #define _POSIX_SYNC_IO 1 #undef _POSIX_ASYNC_IO #undef _POSIX_PRIO_IO #define fdatasync(f) fsync(f) /**************************************************************************** * Global Variables ****************************************************************************/ #undef EXTERN #if defined(__cplusplus) #define EXTERN extern "C" extern "C" { #else #define EXTERN extern #endif /* Used by getopt (obviously NOT thread safe!). These variables cannot be * accessed directly by an external NXFLAT module. In that case, accessor * functions must be used. */ #ifndef __NXFLAT__ EXTERN FAR char *optarg; /* Optional argument following option */ EXTERN int optind; /* Index into argv */ EXTERN int optopt; /* unrecognized option character */ #else # define optarg (*(getoptargp())) # define optind (*(getoptindp())) # define optopt (*(getoptoptp())) #endif /**************************************************************************** * Global Function Prototypes ****************************************************************************/ /* Task Control Interfaces */ pid_t vfork(void); pid_t getpid(void); void _exit(int status) noreturn_function; unsigned int sleep(unsigned int seconds); int usleep(useconds_t usec); int pause(void); /* File descriptor operations */ int close(int fd); int dup(int fd); int dup2(int fd1, int fd2); int fsync(int fd); off_t lseek(int fd, off_t offset, int whence); ssize_t read(int fd, FAR void *buf, size_t nbytes); ssize_t write(int fd, FAR const void *buf, size_t nbytes); ssize_t pread(int fd, FAR void *buf, size_t nbytes, off_t offset); ssize_t pwrite(int fd, FAR const void *buf, size_t nbytes, off_t offset); /* Memory management */ #if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_MM_PGALLOC) && \ defined(CONFIG_ARCH_USE_MMU) FAR void *sbrk(intptr_t incr); #endif /* Special devices */ int pipe(int fd[2]); /* Working directory operations */ int chdir(FAR const char *path); FAR char *getcwd(FAR char *buf, size_t size); /* File path operations */ int access(FAR const char *path, int amode); int rmdir(FAR const char *pathname); int unlink(FAR const char *pathname); /* Execution of programs from files */ #ifdef CONFIG_LIBC_EXECFUNCS int execl(FAR const char *path, ...); int execv(FAR const char *path, FAR char *const argv[]); #endif /* Other */ int getopt(int argc, FAR char *const argv[], FAR const char *optstring); /* Accessor functions intended for use only by external NXFLAT * modules. The global variables optarg, optind, and optopt cannot * be referenced directly from external modules. */ FAR char **getoptargp(void); /* Optional argument following option */ int *getoptindp(void); /* Index into argv */ int *getoptoptp(void); /* unrecognized option character */ #undef EXTERN #if defined(__cplusplus) } #endif #endif /* __INCLUDE_UNISTD_H */