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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/' ```
77 lines
3.4 KiB
C
77 lines
3.4 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et 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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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/calls/struct/metastat.internal.h"
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#include "libc/calls/struct/stat.h"
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#include "libc/calls/syscall-sysv.internal.h"
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#include "libc/calls/syscall_support-nt.internal.h"
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#include "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/intrin/asan.internal.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/intrin/weaken.h"
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#include "libc/nt/files.h"
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#include "libc/runtime/zipos.internal.h"
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#include "libc/sysv/consts/at.h"
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#include "libc/sysv/consts/s.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Returns true if file exists and is a symbolic link.
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*
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* This function is equivalent to:
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*
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* struct stat st;
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* return fstatat(AT_FDCWD, path, &st, AT_SYMLINK_NOFOLLOW) != -1 &&
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* S_ISLNK(st.st_mode);
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*
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* Except faster and with fewer dependencies.
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*
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* @see isregularfile(), isdirectory(), fileexists(), ischardev()
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*/
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bool32 issymlink(const char *path) {
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int e;
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bool res;
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union metastat st;
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struct ZiposUri zipname;
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e = errno;
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if (IsAsan() && !__asan_is_valid_str(path)) {
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efault();
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res = false;
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} else if (_weaken(__zipos_open) &&
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_weaken(__zipos_parseuri)(path, &zipname) != -1) {
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res = false;
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} else if (IsMetal()) {
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res = false;
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} else if (!IsWindows()) {
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if (__sys_fstatat(AT_FDCWD, path, &st, AT_SYMLINK_NOFOLLOW) != -1) {
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res = S_ISLNK(METASTAT(st, st_mode));
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} else {
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res = false;
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}
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} else {
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res = issymlink_nt(path);
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}
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STRACE("%s(%#s) → %hhhd% m", "issymlink", path, res);
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if (!res && (errno == ENOENT || errno == ENOTDIR)) {
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errno = e;
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}
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return res;
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}
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