46 lines
893 B
C
46 lines
893 B
C
/* unistd.h: POSIX constants and functions. */
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#ifndef _UNISTD_H
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#define _UNISTD_H
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#define __need_NULL
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#include <stddef.h>
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#include <stdint.h>
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#include <sys/types.h>
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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pid_t fork();
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/* Returns the current process' process ID. */
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pid_t getpid(void);
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int execv(const char*, char* const*);
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int execve(const char*, char* const*, char* const*);
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int execvp(const char*, char* const*);
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/* Calls the operating system kernel for a specific service. */
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long syscall(long num, ...);
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/* Sleeps for X microseconds. */
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int usleep(useconds_t us);
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/* Sleeps for X seconds. */
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unsigned long sleep(unsigned long seconds);
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/* Closes a file descriptor. */
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int close(int fd);
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/* Reads bytes from a file descriptor. */
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ssize_t read(int fd, void* buf, size_t size);
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#ifdef __cplusplus
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}
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#endif
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#endif
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