src/unistd/pwritev.c

   1 #define _GNU_SOURCE
   2 #include <sys/uio.h>
   3 #include <unistd.h>
   4 #include <fcntl.h>
   5 #include "syscall.h"
   6
   7 ssize_t pwritev(int fd, const struct iovec *iov, int count, off_t ofs)
   8 {
   9         if (ofs == -1) ofs--;
  10         int r = __syscall_cp(SYS_pwritev2, fd, iov, count,
  11                 (long)(ofs), (long)(ofs>>32), RWF_NOAPPEND);
  12         if (r != -EOPNOTSUPP && r != -ENOSYS)
  13                 return __syscall_ret(r);
  14         if (fcntl(fd, F_GETFL) & O_APPEND)
  15                 return __syscall_ret(-EOPNOTSUPP);
  16         return syscall_cp(SYS_pwritev, fd, iov, count,
  17                 (long)(ofs), (long)(ofs>>32));
  18 }