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87 lines
2.2 KiB
87 lines
2.2 KiB
#ifndef __UNISTD_H__
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# define __UNISTD_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdio.h>
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#include <stdint.h>
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#include <sys/types.h>
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/* Standard file descriptors. */
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#define STDIN_FILENO 0
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#define STDOUT_FILENO 1
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#define STDERR_FILENO 2
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/* Write data to a file descriptor; returns number of bytes written or -1. */
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extern ssize_t write(int __fd, const void *__buf, size_t __nbytes);
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/* Read data from a file descriptor; returns number of bytes read or -1. */
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extern ssize_t read(int __fd, void *__buf, size_t __nbytes);
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/* Read at a specific position from a file descriptor. */
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extern ssize_t pread(int __fd, void *__buf, size_t __nbytes, off_t __offset);
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/* Write at a specific position to a file descriptor. */
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extern ssize_t pwrite(int __fd, const void *__buf, size_t __n, off_t __offset);
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/* Seek at an offset from SEEK_SET/SEEK_CUR/SEEK_END; returns new position. */
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extern off_t lseek(int __fd, off_t __offset, int __whence);
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/* Close a file descriptor. */
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extern int close(int __fd);
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/* Remove a file. */
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extern int unlink(const char *__path);
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/* Create a directory. */
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extern int mkdir(const char *__path, mode_t __mode);
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/* Remove an empty directory. */
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extern int rmdir(const char *__path);
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/* Kernel-style functions supported only by Vhex. */
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#ifdef __SUPPORT_VHEX_KERNEL
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//---
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// Process part
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///---
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/* Get the process ID of the calling process. */
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extern pid_t getpid(void);
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/* Get the process group ID of the calling process. */
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extern pid_t getpgid(void);
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/* Get the process ID of the calling process's parent. */
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extern pid_t getppid(void);
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/*
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** Set the process group ID of the process matching PID to PGID.
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** If PID is zero, the current process's process group ID is set.
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** If PGID is zero, the process ID of the process is used.
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*/
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extern int setpgid(pid_t __pid, pid_t __pgid);
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//---
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// System part
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//---
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/*
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** Get the `_PC_*' symbols for the NAME argument to `pathconf' and `fpathconf';
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** the `_SC_*' symbols for the NAME argument to `sysconf'; and the `_CS_*'
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** symbols for the NAME argument to `confstr'.
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*/
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#include <bits/confname.h>
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/* Get the value of the system variable NAME. */
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extern long int sysconf(int __name);
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#endif /*__SUPPORT_VHEX_KERNEL*/
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#ifdef __cplusplus
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}
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#endif
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#endif /*__UNISTD_H__*/
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