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70 lines
1.8 KiB
70 lines
1.8 KiB
/*
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Copyright (c) 2019, Antonio SJ Musumeci <trapexit@spawn.link>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "fs_copydata_copy_file_range.hpp"
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#include "errno.hpp"
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#include "fs_copy_file_range.hpp"
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#include "fs_fstat.hpp"
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#include "int_types.h"
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static
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s64
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_copydata_copy_file_range(const int src_fd_,
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const int dst_fd_,
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const u64 count_)
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{
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s64 rv;
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u64 nleft;
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s64 src_off;
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s64 dst_off;
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src_off = 0;
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dst_off = 0;
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nleft = count_;
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while(nleft > 0)
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{
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rv = fs::copy_file_range(src_fd_,&src_off,dst_fd_,&dst_off,nleft,0);
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switch(rv)
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{
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case -EINTR:
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case -EAGAIN:
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continue;
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case 0:
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break;
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default:
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if(rv < 0)
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return rv;
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break;
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}
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nleft -= rv;
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}
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return (count_ - nleft);
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}
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s64
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fs::copydata_copy_file_range(const int src_fd_,
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const int dst_fd_,
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const u64 count_)
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{
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return ::_copydata_copy_file_range(src_fd_,
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dst_fd_,
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count_);
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}
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