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Rewrite special file handling on Windows

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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
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GPG key ID: BE714B4575D6E328
53 changed files with 485 additions and 299 deletions
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10
libc/calls/read-nt.c
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@ -16,6 +16,7 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/assert.h"
#include "libc/atomic.h"
#include "libc/calls/internal.h"
#include "libc/calls/sig.internal.h"
@ -733,8 +734,10 @@ static textwindows int WaitForConsole(struct Fd *f, sigset_t waitmask) {
atomic_store_explicit(&pt->pt_blocker, PT_BLOCKER_SEM, memory_order_release);
m = __sig_beginwait(waitmask);
if ((rc = _check_cancel()) != -1 && (rc = _check_signal(true)) != -1) {
WaitForMultipleObjects(2, (int64_t[2]){sem, __keystroke.cin}, 0, ms);
int64_t hands[2] = {sem, __keystroke.cin};
unassert(WaitForMultipleObjects(2, hands, 0, ms) != -1u);
if (~pt->pt_flags & PT_RESTARTABLE) rc = eintr();
rc |= _check_signal(true);
if (rc == -1 && errno == EINTR) _check_cancel();
}
__sig_finishwait(m);
@ -763,6 +766,11 @@ textwindows ssize_t sys_read_nt_impl(int fd, void *data, size_t size,
// switch to terminal polyfill if reading from win32 console
struct Fd *f = g_fds.p + fd;
if (f->kind == kFdDevNull) {
return 0;
}
if (f->kind == kFdConsole) {
return ReadFromConsole(f, data, size, waitmask);
}