mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 13:00:06 +00:00
581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
61 lines
2.1 KiB
C
61 lines
2.1 KiB
C
/* sendfile -- copy data directly from one file descriptor to another
|
|
Copyright (C) 2002-2022 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 <hurd.h>
|
|
#include <hurd/fd.h>
|
|
#include <sys/mman.h>
|
|
|
|
/* Send COUNT bytes from file associated with IN_FD starting at OFFSET to
|
|
descriptor OUT_FD. */
|
|
ssize_t
|
|
__sendfile64 (int out_fd, int in_fd, off64_t *offset, size_t count)
|
|
{
|
|
/* We just do a vanilla io_read followed by a vanilla io_write here.
|
|
In theory the IN_FD filesystem can return us out-of-line data that
|
|
we then send out-of-line to the OUT_FD filesystem and no copying
|
|
takes place until those pages need to be flushed or packaged by
|
|
that filesystem (e.g. packetized by a network socket). However,
|
|
we momentarily consume COUNT bytes of our local address space,
|
|
which might blow if it's huge or address space is real tight. */
|
|
|
|
char *data = 0;
|
|
size_t datalen = 0;
|
|
error_t err = HURD_DPORT_USE (in_fd,
|
|
__io_read (port, &data, &datalen,
|
|
offset ? *offset : (off_t) -1,
|
|
count));
|
|
if (err == 0)
|
|
{
|
|
size_t nwrote;
|
|
if (datalen == 0)
|
|
return 0;
|
|
err = HURD_DPORT_USE (out_fd, __io_write (port, data, datalen,
|
|
(off_t) -1, &nwrote));
|
|
__munmap (data, datalen);
|
|
if (err == 0)
|
|
{
|
|
if (offset)
|
|
*offset += datalen;
|
|
return nwrote;
|
|
}
|
|
}
|
|
return __hurd_fail (err);
|
|
}
|
|
strong_alias (__sendfile64, sendfile64)
|