mirror of
https://github.com/jart/cosmopolitan.git
synced 2024-05-17 02:52:40 +00:00
2046c0d2ae
- Expand redbean UNIX module - Expand redbean documentation - Ensure Lua copyright is embedded in binary - Increase the PATH_MAX limit especially on NT - Use column major sorting for linenoise completions - Fix some suboptimalities in redbean's new UNIX API - Figured out right flags for Multics newline in raw mode
105 lines
4.3 KiB
C
105 lines
4.3 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2021 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/calls/internal.h"
|
|
#include "libc/calls/strace.internal.h"
|
|
#include "libc/mem/alloca.h"
|
|
#include "libc/nt/createfile.h"
|
|
#include "libc/nt/enum/creationdisposition.h"
|
|
#include "libc/nt/enum/fileflagandattributes.h"
|
|
#include "libc/nt/enum/fsctl.h"
|
|
#include "libc/nt/enum/io.h"
|
|
#include "libc/nt/files.h"
|
|
#include "libc/nt/runtime.h"
|
|
#include "libc/nt/struct/reparsedatabuffer.h"
|
|
#include "libc/str/str.h"
|
|
#include "libc/str/tpenc.h"
|
|
#include "libc/str/utf16.h"
|
|
#include "libc/sysv/errfuns.h"
|
|
|
|
textwindows ssize_t sys_readlinkat_nt(int dirfd, const char *path, char *buf,
|
|
size_t bufsiz) {
|
|
int64_t h;
|
|
ssize_t rc;
|
|
uint64_t w;
|
|
wint_t x, y;
|
|
volatile char *memory;
|
|
uint32_t i, j, n, mem;
|
|
char16_t path16[PATH_MAX + 1], *p;
|
|
struct NtReparseDataBuffer *rdb;
|
|
if (__mkntpathat(dirfd, path, 0, path16) == -1) return -1;
|
|
mem = 16384;
|
|
memory = alloca(mem);
|
|
for (i = 0; i < mem; i += PAGESIZE) memory[i] = 0;
|
|
rdb = (struct NtReparseDataBuffer *)memory;
|
|
if ((h = CreateFile(path16, 0, 0, 0, kNtOpenExisting,
|
|
kNtFileFlagOpenReparsePoint | kNtFileFlagBackupSemantics,
|
|
0)) != -1) {
|
|
if (DeviceIoControl(h, kNtFsctlGetReparsePoint, 0, 0, rdb, mem, &n, 0)) {
|
|
if (rdb->ReparseTag == kNtIoReparseTagSymlink) {
|
|
i = 0;
|
|
j = 0;
|
|
n = rdb->SymbolicLinkReparseBuffer.PrintNameLength / sizeof(char16_t);
|
|
p = (char16_t *)((char *)rdb->SymbolicLinkReparseBuffer.PathBuffer +
|
|
rdb->SymbolicLinkReparseBuffer.PrintNameOffset);
|
|
if (n >= 3 && isalpha(p[0]) && p[1] == ':' && p[2] == '\\') {
|
|
buf[j++] = '/';
|
|
buf[j++] = '/';
|
|
buf[j++] = '?';
|
|
buf[j++] = '/';
|
|
}
|
|
while (i < n) {
|
|
x = p[i++] & 0xffff;
|
|
if (!IsUcs2(x)) {
|
|
if (i < n) {
|
|
y = p[i++] & 0xffff;
|
|
x = MergeUtf16(x, y);
|
|
} else {
|
|
x = 0xfffd;
|
|
}
|
|
}
|
|
if (x < 0200) {
|
|
if (x == '\\') {
|
|
x = '/';
|
|
}
|
|
w = x;
|
|
} else {
|
|
w = tpenc(x);
|
|
}
|
|
do {
|
|
if (j < bufsiz) {
|
|
buf[j++] = w;
|
|
}
|
|
w >>= 8;
|
|
} while (w);
|
|
}
|
|
rc = j;
|
|
} else {
|
|
NTTRACE("sys_readlinkat_nt() should have kNtIoReparseTagSymlink");
|
|
rc = einval();
|
|
}
|
|
} else {
|
|
rc = -1;
|
|
}
|
|
CloseHandle(h);
|
|
} else {
|
|
rc = __fix_enotdir(-1, path16);
|
|
}
|
|
return rc;
|
|
}
|