50 lines
2.8 KiB
C
50 lines
2.8 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ 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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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/calls/internal.h"
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#include "libc/dce.h"
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#include "libc/sysv/consts/at.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Changes permissions on file, e.g.:
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*
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* CHECK_NE(-1, chmod("foo/bar.txt", 0644));
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* CHECK_NE(-1, chmod("o/default/program.com", 0755));
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* CHECK_NE(-1, chmod("privatefolder/", 0700));
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*
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* The esoteric bits generally available on System Five are:
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*
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* CHECK_NE(-1, chmod("/opt/", 01000)); // sticky bit
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* CHECK_NE(-1, chmod("/usr/bin/sudo", 04755)); // setuid bit
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* CHECK_NE(-1, chmod("/usr/bin/wall", 02755)); // setgid bit
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*
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* This works on Windows NT if you ignore the error ;-)
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*
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* @param pathname must exist
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* @param mode contains octal flags (base 8)
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* @errors ENOENT, ENOTDIR, ENOSYS
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* @asyncsignalsafe
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* @see fchmod()
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*/
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int chmod(const char *pathname, uint32_t mode) {
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return fchmodat$sysv(AT_FDCWD, pathname, mode, 0);
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}
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