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#include "file.h"
#ifndef lint
FILE_RCSID("@(#)$File: pread.c,v 1.3 2014/09/15 19:11:25 christos Exp $")
#endif /* lint */
#include <fcntl.h>
#include <unistd.h>
ssize_t
pread(int fd, void *buf, size_t len, off_t off) {
off_t old;
ssize_t rv;
if ((old = lseek(fd, off, SEEK_SET)) == -1)
return -1;
if ((rv = read(fd, buf, len)) == -1)
return -1;
if (lseek(fd, old, SEEK_SET) == -1)
return -1;
return rv;
}
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