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Improve Windows Console I/O

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- Blocking read operations on the Windows Console can now EINTR
- Blocking read operations on Windows pipes now EINTR more reliably
- setitimer() will no longer be inherited across fork() on Windows
- It's now possible to use ECHO when the console is in raw mode
- The ECHOCTL flag now works correctly on the Windows Console
- The ICRNL flag now works correctly on the Windows Console
- pread() and pwrite() will now raise ESPIPE on Windows
- Opening /dev/tty on Windows is improved (untested)
- Overlapped I/O is now implemented in a better way
This commit is contained in:
Justine Tunney 2023-08-08 04:00:29 -07:00
parent decf216655
commit 33d280c8ba
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GPG key ID: BE714B4575D6E328
34 changed files with 580 additions and 376 deletions
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30
test/libc/calls/read_test.c
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@ -18,14 +18,18 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/assert.h"
#include "libc/calls/calls.h"
#include "libc/calls/cp.internal.h"
#include "libc/calls/internal.h"
#include "libc/calls/struct/iovec.h"
#include "libc/calls/struct/iovec.internal.h"
#include "libc/calls/struct/sigaction.h"
#include "libc/calls/syscall-sysv.internal.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/sock/internal.h"
#include "libc/sysv/consts/nr.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/consts/sig.h"
#include "libc/testlib/ezbench.h"
#include "libc/testlib/testlib.h"
@ -43,10 +47,35 @@ TEST(read, eof) {
ASSERT_SYS(0, 0, close(3));
}
volatile bool got_sigalrm;
void OnSigalrm(int sig) {
got_sigalrm = true;
}
TEST(read_pipe, canBeInterruptedByAlarm) {
int fds[2];
char buf[1];
struct sigaction sa;
alarm(1);
sa.sa_flags = 0;
sa.sa_handler = OnSigalrm;
sigemptyset(&sa.sa_mask);
sigaction(SIGALRM, &sa, 0);
ASSERT_SYS(0, 0, pipe(fds));
ASSERT_SYS(ESPIPE, -1, pread(fds[0], buf, 1, 777));
ASSERT_SYS(EINTR, -1, read(fds[0], buf, 1));
ASSERT_TRUE(got_sigalrm);
signal(SIGALRM, SIG_DFL);
close(fds[1]);
close(fds[0]);
}
////////////////////////////////////////////////////////////////////////////////
BENCH(read, bench) {
char buf[16];
BEGIN_CANCELLATION_POINT;
ASSERT_SYS(0, 3, open("/dev/zero", O_RDONLY));
EZBENCH2("read", donothing, read(3, buf, 5));
EZBENCH2("pread", donothing, pread(3, buf, 5, 0));
@ -59,4 +88,5 @@ BENCH(read, bench) {
EZBENCH2("sys_read", donothing, sys_read(3, buf, 5));
EZBENCH2("sys_readv", donothing, sys_readv(3, &(struct iovec){buf, 5}, 1));
ASSERT_SYS(0, 0, close(3));
END_CANCELLATION_POINT;
}