mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 22:40:05 +00:00
56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
/* Transfer data between file descriptors. Linux version.
|
|
Copyright (C) 2011-2024 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library. If not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <sys/sendfile.h>
|
|
#include <stddef.h>
|
|
#include <errno.h>
|
|
#include <sysdep.h>
|
|
|
|
#ifndef __OFF_T_MATCHES_OFF64_T
|
|
|
|
/* Send COUNT bytes from file associated with IN_FD starting at OFFSET to
|
|
descriptor OUT_FD. */
|
|
ssize_t
|
|
sendfile (int out_fd, int in_fd, off_t *offset, size_t count)
|
|
{
|
|
# ifdef __NR_sendfile
|
|
return INLINE_SYSCALL_CALL (sendfile, out_fd, in_fd, offset, count);
|
|
# else
|
|
__off64_t off64;
|
|
int rc;
|
|
|
|
if (offset != NULL)
|
|
{
|
|
if (*offset < 0 || (off_t) (*offset + count) < 0)
|
|
{
|
|
__set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
off64 = *offset;
|
|
}
|
|
|
|
rc = INLINE_SYSCALL_CALL (sendfile64, out_fd, in_fd, offset ? &off64 : NULL,
|
|
count);
|
|
if (offset)
|
|
*offset = off64;
|
|
return rc;
|
|
# endif
|
|
}
|
|
|
|
#endif
|