mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
110 lines
4.5 KiB
C
110 lines
4.5 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2020 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/struct/fd.internal.h"
|
|
#include "libc/calls/struct/sigset.internal.h"
|
|
#include "libc/calls/struct/stat.internal.h"
|
|
#include "libc/calls/syscall_support-nt.internal.h"
|
|
#include "libc/errno.h"
|
|
#include "libc/nt/createfile.h"
|
|
#include "libc/nt/enum/accessmask.h"
|
|
#include "libc/nt/enum/creationdisposition.h"
|
|
#include "libc/nt/enum/fileflagandattributes.h"
|
|
#include "libc/nt/enum/filesharemode.h"
|
|
#include "libc/nt/errors.h"
|
|
#include "libc/nt/runtime.h"
|
|
#include "libc/str/str.h"
|
|
#include "libc/sysv/consts/at.h"
|
|
#include "libc/sysv/consts/fileno.h"
|
|
#include "libc/sysv/errfuns.h"
|
|
|
|
static int Atoi(const char *str) {
|
|
int c;
|
|
unsigned x = 0;
|
|
if (!*str) return -1;
|
|
while ((c = *str++)) {
|
|
if ('0' <= c && c <= '9') {
|
|
x *= 10;
|
|
x += c - '0';
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
return x;
|
|
}
|
|
|
|
textwindows int sys_fstatat_nt(int dirfd, const char *path, struct stat *st,
|
|
int flags) {
|
|
|
|
// handle special files
|
|
if (startswith(path, "/dev/")) {
|
|
int fd;
|
|
if (!strcmp(path + 5, "tty")) {
|
|
return sys_fstat_nt_special(kFdConsole, st);
|
|
} else if (!strcmp(path + 5, "null")) {
|
|
return sys_fstat_nt_special(kFdDevNull, st);
|
|
} else if (!strcmp(path + 5, "stdin")) {
|
|
return sys_fstat_nt(STDIN_FILENO, st);
|
|
} else if (!strcmp(path + 5, "stdout")) {
|
|
return sys_fstat_nt(STDOUT_FILENO, st);
|
|
} else if (!strcmp(path + 5, "stderr")) {
|
|
return sys_fstat_nt(STDERR_FILENO, st);
|
|
} else if (startswith(path + 5, "fd/") && (fd = Atoi(path + 8)) != -1) {
|
|
return sys_fstat_nt(fd, st);
|
|
} else {
|
|
return enoent();
|
|
}
|
|
}
|
|
|
|
// convert path from utf-8 to utf-16
|
|
uint16_t path16[PATH_MAX];
|
|
if (__mkntpathat(dirfd, path, 0, path16) == -1) {
|
|
return -1;
|
|
}
|
|
|
|
// open an actual file
|
|
int rc;
|
|
int64_t fh;
|
|
int e = errno;
|
|
uint32_t dwDesiredAccess = kNtFileGenericRead;
|
|
BLOCK_SIGNALS;
|
|
TryAgain:
|
|
if ((fh = CreateFile(
|
|
path16, dwDesiredAccess,
|
|
kNtFileShareRead | kNtFileShareWrite | kNtFileShareDelete, 0,
|
|
kNtOpenExisting,
|
|
kNtFileAttributeNormal | kNtFileFlagBackupSemantics |
|
|
((flags & AT_SYMLINK_NOFOLLOW) ? kNtFileFlagOpenReparsePoint
|
|
: 0),
|
|
0)) != -1) {
|
|
rc = st ? sys_fstat_nt_handle(fh, path16, st) : 0;
|
|
CloseHandle(fh);
|
|
} else if (dwDesiredAccess == kNtFileGenericRead &&
|
|
(GetLastError() == kNtErrorAccessDenied ||
|
|
GetLastError() == kNtErrorSharingViolation)) {
|
|
dwDesiredAccess = kNtFileReadAttributes;
|
|
errno = e;
|
|
goto TryAgain;
|
|
} else {
|
|
rc = __winerr();
|
|
}
|
|
ALLOW_SIGNALS;
|
|
|
|
// mop up errors
|
|
return __fix_enotdir(rc, path16);
|
|
}
|