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Diffstat (limited to 'nuttx/include/unistd.h')
| -rw-r--r-- | nuttx/include/unistd.h | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/nuttx/include/unistd.h b/nuttx/include/unistd.h new file mode 100644 index 000000000..e2ad6ff82 --- /dev/null +++ b/nuttx/include/unistd.h @@ -0,0 +1,179 @@ +/**************************************************************************** + * include/unistd.h + * + * Copyright (C) 2007-2009 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * 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 <sys/types.h> +#include <nuttx/compiler.h> + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/* The number of functions that may be registerd 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 +#undef _POSIX_MEMLOCK +#undef _POSIX_MEMLOCK_RANGE +#undef _POSIX_FSYNC +#define _POSIX_SYNCHRONIZED_IO +#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 +#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 (*(getopindgp())) +# define optopt (*(getoptoptp())) +#endif + +/**************************************************************************** + * Global Function Prototypes + ****************************************************************************/ + +/* Task Control Interfaces */ + +EXTERN pid_t getpid(void); +EXTERN void _exit(int status) noreturn_function; +EXTERN unsigned int sleep(unsigned int seconds); +EXTERN int usleep(useconds_t usec); + +/* File descriptor operations */ + +EXTERN int close(int fd); +EXTERN int dup(int fd); +EXTERN int dup2(int fd1, int fd2); +EXTERN int fsync(int fd); +EXTERN off_t lseek(int fd, off_t offset, int whence); +EXTERN ssize_t read(int fd, FAR void *buf, size_t nbytes); +EXTERN ssize_t write(int fd, FAR const void *buf, size_t nbytes); + +/* Special devices */ + +EXTERN int pipe(int filedes[2]); + +/* Working directory operations */ + +EXTERN int chdir(FAR const char *path); +EXTERN FAR char *getcwd(FAR char *buf, size_t size); + +/* File path operations */ + +EXTERN int unlink(FAR const char *pathname); +EXTERN int rmdir(FAR const char *pathname); + +/* Other */ + +EXTERN 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. + */ + +EXTERN FAR char **getoptargp(void); /* Optional argument following option */ +EXTERN int *getopindgp(void); /* Index into argv */ +EXTERN int *getoptoptp(void); /* unrecognized option character */ + +#undef EXTERN +#if defined(__cplusplus) +} +#endif + +#endif /* __INCLUDE_UNISTD_H */ |