mirror of
https://github.com/jart/cosmopolitan.git
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690be544da
- Better UBSAN error messages - POSIX Advisory Locks polyfills - Move redbean manual to /.help.txt - System call memory safety in ASAN mode - Character classification now does UNICODE
57 lines
2.8 KiB
C
57 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 2021 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/internal.h"
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#include "libc/calls/struct/stat.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/at.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/errfuns.h"
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#define XNU_F_GETPATH 50
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#define XNU_MAXPATHLEN 1024
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char *sys_getcwd_xnu(char *res, size_t size) {
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int fd;
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struct stat st[2];
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char buf[XNU_MAXPATHLEN], *ret = NULL;
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if ((fd = sys_openat(AT_FDCWD, ".", O_RDONLY | O_DIRECTORY, 0)) != -1) {
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if (sys_fstat(fd, &st[0]) != -1) {
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if (st[0].st_dev && st[0].st_ino) {
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if (__sys_fcntl(fd, XNU_F_GETPATH, (uintptr_t)buf) != -1) {
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if (sys_fstatat(AT_FDCWD, buf, &st[1], 0) != -1) {
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if (st[0].st_dev == st[1].st_dev && st[0].st_ino == st[1].st_ino) {
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if (memccpy(res, buf, '\0', size)) {
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ret = res;
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} else {
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erange();
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}
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} else {
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einval();
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}
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}
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}
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} else {
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einval();
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}
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}
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close(fd);
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}
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return ret;
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}
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