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* hurd/hurdauth.c (_S_msg_add_auth): Call __vm_allocate and __vm_deallocate instead of vm_allocate and vm_deallocate. * hurd/hurdmsg.c (_S_msg_set_env_variable): Call __setenv instead of setenv. * hurd/hurdprio.c (_hurd_priority_which_map): Call __geteuid instead of geteuid. * hurd/path-lookup.c (file_name_path_scan): Call __strdup instead of strdup. * hurd/siginfo.c: Include <libioP.h>. (_hurd_siginfo_handler): Call _IO_puts instead of puts. * hurd/xattr.c (_hurd_xattr_get, _hurd_xattr_set): Call __munmap instead of munmap. * io/fts.c (fts_build): Call __dirfd instead of dirfd. * mach/devstream.c: Include <libioP.h>. (dealloc_ref): Call __mach_port_deallocate instead of mach_port_deallocate. (mach_open_devstream): Call _IO_fopencookie instead of fopencookie. Call __mach_port_deallocate instead of mach_port_deallocate. * stdlib/canonicalize.c (__realpath): Call __pathconf instead of pathconf. * sysdeps/mach/hurd/ifreq.c (__ifreq): Call __munmap instead of munmap. * sysdeps/mach/hurd/ifreq.h (__if_freereq): Likewise. * sysdeps/mach/hurd/ptrace.c (ptrace): Call __kill instead of kill. * sysdeps/mach/hurd/sendfile64.c (sendfile64): Call __munmap instead of munmap. * sysdeps/mach/hurd/socketpair.c (__socketpair): Call __close instead of close. * sysdeps/posix/clock_getres.c (realtime_getres): Call __sysconf instead of sysconf. * sysdeps/pthread/timer_gettime.c (timer_gettime): Call __clock_gettime instead of clock_gettime. * sysdeps/pthread/timer_routines.c (thread_func): Likewise. * sysdeps/pthread/timer_settime.c (timer_settime): Likewise. * sysdeps/unix/bsd/gtty.c (gtty): Call __ioctl instead of ioctl. * sysdeps/unix/bsd/stty.c (stty): Likewise. * sysdeps/unix/bsd/tcflow.c (tcflow): Call __tcgetattr instead of tcgetattr. * sysdeps/unix/clock_nanosleep.c (__clock_nanosleep): Call __clock_gettime and __nanosleep instead of clock_gettime and nanosleep.
60 lines
2.1 KiB
C
60 lines
2.1 KiB
C
/* sendfile -- copy data directly from one file descriptor to another
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Copyright (C) 2002-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sys/sendfile.h>
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#include <hurd.h>
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#include <hurd/fd.h>
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#include <sys/mman.h>
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/* Send COUNT bytes from file associated with IN_FD starting at OFFSET to
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descriptor OUT_FD. */
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ssize_t
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sendfile64 (int out_fd, int in_fd, off64_t *offset, size_t count)
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{
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/* We just do a vanilla io_read followed by a vanilla io_write here.
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In theory the IN_FD filesystem can return us out-of-line data that
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we then send out-of-line to the OUT_FD filesystem and no copying
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takes place until those pages need to be flushed or packaged by
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that filesystem (e.g. packetized by a network socket). However,
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we momentarily consume COUNT bytes of our local address space,
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which might blow if it's huge or address space is real tight. */
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char *data = 0;
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size_t datalen = 0;
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error_t err = HURD_DPORT_USE (in_fd,
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__io_read (port, &data, &datalen,
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offset ? *offset : (off_t) -1,
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count));
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if (err == 0)
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{
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size_t nwrote;
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if (datalen == 0)
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return 0;
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err = HURD_DPORT_USE (out_fd, __io_write (port, data, datalen,
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(off_t) -1, &nwrote));
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__munmap (data, datalen);
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if (err == 0)
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{
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if (offset)
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*offset += datalen;
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return nwrote;
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}
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}
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return __hurd_fail (err);
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}
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