mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-06-26 22:38:30 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Rewrite special file handling on Windows

Browse source 
This change gets GNU grep working. What caused it to not work, is it
wouldn't write to an output file descriptor when its dev/ino equaled
/dev/null's. So now we invent special dev/ino values for these files
This commit is contained in:
Justine Tunney 2023-10-14 01:06:00 -07:00
parent aca2261cda
commit 2db2f40a98
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
53 changed files with 485 additions and 299 deletions
Download patch file Download diff file Expand all files Collapse all files

44
libc/calls/fstatat-nt.c
View file

@ -16,9 +16,8 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/sig.internal.h"
#include "libc/calls/struct/fd.internal.h"
#include "libc/calls/struct/sigset.internal.h"
#include "libc/calls/struct/stat.h"
#include "libc/calls/struct/stat.internal.h"
#include "libc/calls/syscall_support-nt.internal.h"
#include "libc/errno.h"
@ -29,18 +28,43 @@
#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"
textwindows int sys_fstatat_nt(int dirfd, const char *path, struct stat *st,
int flags) {
int rc, e;
int64_t fh;
uint32_t dwDesiredAccess;
// handle special files
if (startswith(path, "/dev/")) {
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 {
return enoent();
}
}
// convert path from utf-8 to utf-16
uint16_t path16[PATH_MAX];
if (__mkntpathat(dirfd, path, 0, path16) == -1) return -1;
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;
e = errno;
dwDesiredAccess = kNtFileGenericRead;
TryAgain:
if ((fh = CreateFile(
path16, dwDesiredAccess,
@ -50,7 +74,7 @@ TryAgain:
((flags & AT_SYMLINK_NOFOLLOW) ? kNtFileFlagOpenReparsePoint
: 0),
0)) != -1) {
rc = st ? sys_fstat_nt(fh, st) : 0;
rc = st ? sys_fstat_nt_handle(fh, st) : 0;
CloseHandle(fh);
} else if (dwDesiredAccess == kNtFileGenericRead &&
GetLastError() == kNtErrorSharingViolation) {
@ -61,5 +85,7 @@ TryAgain:
rc = __winerr();
}
ALLOW_SIGNALS;
// mop up errors
return __fix_enotdir(rc, path16);
}