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e16a7d8f3b
`et` means `expandtab`. ```sh rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\) :vi/vi: \1 xoet\2:vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2 :vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/' ```
71 lines
3.5 KiB
C
71 lines
3.5 KiB
C
/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
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│ vi: set noet ft=c ts=8 tw=8 fenc=utf-8 :vi │
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╚──────────────────────────────────────────────────────────────────────────────╝
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│ │
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│ Musl Libc │
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│ Copyright © 2005-2014 Rich Felker, et al. │
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│ │
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│ Permission is hereby granted, free of charge, to any person obtaining │
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│ a copy of this software and associated documentation files (the │
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│ "Software"), to deal in the Software without restriction, including │
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│ without limitation the rights to use, copy, modify, merge, publish, │
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│ distribute, sublicense, and/or sell copies of the Software, and to │
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│ permit persons to whom the Software is furnished to do so, subject to │
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│ the following conditions: │
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│ │
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│ The above copyright notice and this permission notice shall be │
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│ included in all copies or substantial portions of the Software. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
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│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
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│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
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│ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY │
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│ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, │
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│ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │
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│ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │
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│ │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "third_party/musl/lockf.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/struct/flock.h"
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#include "libc/calls/weirdtypes.h"
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#include "libc/errno.h"
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#include "libc/sysv/consts/f.h"
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#include "libc/sysv/errfuns.h"
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asm(".ident\t\"\\n\\n\
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Musl libc (MIT License)\\n\
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Copyright 2005-2014 Rich Felker, et. al.\"");
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asm(".include \"libc/disclaimer.inc\"");
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/**
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* Locks file.
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*
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* @cancelationpoint when `op` is `F_LOCK`
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*/
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int lockf(int fd, int op, off_t size)
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{
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struct flock l = {
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.l_type = F_WRLCK,
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.l_whence = SEEK_CUR,
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.l_len = size,
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};
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switch (op) {
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case F_TEST:
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l.l_type = F_RDLCK;
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if (fcntl(fd, F_GETLK, &l) < 0)
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return -1;
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if (l.l_type == F_UNLCK || l.l_pid == getpid())
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return 0;
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return eacces();
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case F_ULOCK:
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l.l_type = F_UNLCK;
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case F_TLOCK:
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return fcntl(fd, F_SETLK, &l);
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case F_LOCK:
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return fcntl(fd, F_SETLKW, &l);
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}
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return einval();
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}
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__weak_reference(lockf, lockf64);
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