+++ /dev/null
-/* $Id: pwrite.c 5049 2001-12-12 09:06:00Z rra $
-**
-** Replacement for a missing pwrite.
-**
-** Written by Russ Allbery <rra@stanford.edu>
-** This work is hereby placed in the public domain by its author.
-**
-** Provides the same functionality as the standard library routine pwrite
-** for those platforms that don't have it. Note that pwrite requires that
-** the file pointer not move and without the library function, we can't
-** copy that behavior; instead, we approximate it by moving the file
-** pointer and then moving it back. This may break threaded programs.
-*/
-
-#include "config.h"
-#include "clibrary.h"
-#include <errno.h>
-
-/* If we're running the test suite, rename pread to avoid conflicts with the
- system version. #undef first because large file support may define a
- macro pwrite (pointing to pwrite64) on some platforms (e.g. Solaris). */
-#if TESTING
-# undef pwrite
-# define pwrite test_pwrite
-ssize_t test_pwrite(int, const void *, size_t, off_t);
-#endif
-
-ssize_t
-pwrite(int fd, const void *buf, size_t nbyte, off_t offset)
-{
- off_t current;
- ssize_t nwritten;
- int oerrno;
-
- current = lseek(fd, 0, SEEK_CUR);
- if (current == (off_t) -1 || lseek(fd, offset, SEEK_SET) == (off_t) -1)
- return -1;
-
- nwritten = write(fd, buf, nbyte);
-
- /* Ignore errors in restoring the file position; this isn't ideal, but
- reporting a failed write when the write succeeded is worse. Make
- sure that errno, if set, is set by write and not lseek. */
- oerrno = errno;
- lseek(fd, current, SEEK_SET);
- errno = oerrno;
- return nwritten;
-}