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57 lines
1.5 KiB
57 lines
1.5 KiB
/*
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Copyright (c) 2016, 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 <errno.h>
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#include <fcntl.h>
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#include "fs_fallocate.hpp"
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namespace fs
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{
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static
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int
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_fallocate_core(const int fd,
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const off_t offset,
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const off_t len)
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{
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int rv;
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fstore_t store = {F_ALLOCATECONTIG,F_PEOFPOSMODE,offset,len,0};
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rv = ::fcntl(fd,F_PREALLOCATE,&store);
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if(rv == -1)
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{
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store.fst_flags = F_ALLOCATEALL;
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rv = ::fcntl(fd,F_PREALLOCATE,&store);
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}
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if(rv == -1)
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return rv;
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return ::ftruncate(fd,(offset+len));
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}
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int
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fallocate(const int fd,
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const int mode,
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const off_t offset,
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const off_t len)
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{
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if(mode)
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return (errno=EOPNOTSUPP,-1);
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return ::_fallocate_core(fd,offset,len);
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}
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}
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