1 /* 2 ** Copyright 2001, Manuel J. Petit. All rights reserved. 3 ** Distributed under the terms of the NewOS License. 4 */ 5 6 /* 7 ** Copyright 2002, Axel Dörfler, axeld@pinc-software.de. All rights reserved. 8 ** Distributed under the terms of the OpenBeOS License. 9 */ 10 11 12 #include <unistd.h> 13 #include <syscalls.h> 14 #include <errno.h> 15 16 17 #define RETURN_AND_SET_ERRNO(err) \ 18 if (err < 0) { \ 19 errno = err; \ 20 return -1; \ 21 } \ 22 return err; 23 24 25 ssize_t 26 read(int fd, void *buffer, size_t bufferSize) 27 { 28 ssize_t status = _kern_read(fd, -1, buffer, bufferSize); 29 30 RETURN_AND_SET_ERRNO(status); 31 } 32 33 34 ssize_t 35 read_pos(int fd, off_t pos, void *buffer, size_t bufferSize) 36 { 37 ssize_t status = _kern_read(fd, pos, buffer, bufferSize); 38 39 RETURN_AND_SET_ERRNO(status); 40 } 41 42 43 ssize_t 44 pread(int fd, void *buffer, size_t bufferSize, off_t pos) 45 { 46 ssize_t status = _kern_read(fd, pos, buffer, bufferSize); 47 48 RETURN_AND_SET_ERRNO(status); 49 } 50 51