| 1 | /* sendfile -- copy data directly from one file descriptor to another |
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| 2 | Copyright (C) 2002-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <sys/sendfile.h> |
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| 20 | #include <stddef.h> |
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| 21 | |
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| 22 | /* Send COUNT bytes from file associated with IN_FD starting at OFFSET to |
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| 23 | descriptor OUT_FD. */ |
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| 24 | ssize_t |
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| 25 | sendfile (int out_fd, int in_fd, off_t *offset, size_t count) |
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| 26 | { |
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| 27 | if (offset == NULL || sizeof (off_t) == sizeof (off64_t)) |
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| 28 | return __sendfile64 (out_fd, in_fd, (off64_t *) offset, count); |
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| 29 | else |
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| 30 | { |
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| 31 | off64_t ofs = *offset; |
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| 32 | ssize_t ret = __sendfile64 (out_fd, in_fd, &ofs, count); |
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| 33 | *offset = ofs; |
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| 34 | return ret; |
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| 35 | } |
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| 36 | } |
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| 37 | |
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