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-rw-r--r--erts/emulator/drivers/unix/ttsl_drv.c130
-rw-r--r--erts/emulator/sys/unix/sys.c23
2 files changed, 135 insertions, 18 deletions
diff --git a/erts/emulator/drivers/unix/ttsl_drv.c b/erts/emulator/drivers/unix/ttsl_drv.c
index 491e0a090e..73ce27c6ec 100644
--- a/erts/emulator/drivers/unix/ttsl_drv.c
+++ b/erts/emulator/drivers/unix/ttsl_drv.c
@@ -32,6 +32,10 @@ static ErlDrvData ttysl_start(ErlDrvPort, char*);
#ifdef HAVE_TERMCAP /* else make an empty driver that can not be opened */
+#ifndef WANT_NONBLOCKING
+#define WANT_NONBLOCKING
+#endif
+
#include "sys.h"
#include <ctype.h>
#include <stdlib.h>
@@ -39,6 +43,7 @@ static ErlDrvData ttysl_start(ErlDrvPort, char*);
#include <string.h>
#include <signal.h>
#include <fcntl.h>
+#include <limits.h>
#include <locale.h>
#include <unistd.h>
#include <termios.h>
@@ -57,6 +62,14 @@ static ErlDrvData ttysl_start(ErlDrvPort, char*);
#include <langinfo.h>
#endif
+#if defined IOV_MAX
+#define MAXIOV IOV_MAX
+#elif defined UIO_MAXIOV
+#define MAXIOV UIO_MAXIOV
+#else
+#define MAXIOV 16
+#endif
+
#define TRUE 1
#define FALSE 0
@@ -85,7 +98,9 @@ static volatile int cols_needs_update = FALSE;
#define CTRL_OP_GET_UNICODE_STATE 101
#define CTRL_OP_SET_UNICODE_STATE 102
-
+/* We use 1024 as the buf size as that was the default buf size of FILE streams
+ on all platforms that I checked. */
+#define TTY_BUFFSIZE 1024
static int lbuf_size = BUFSIZ;
static Uint32 *lbuf; /* The current line buffer */
@@ -113,13 +128,18 @@ static int lpos; /* The current "cursor position" in the line buf
/* Main interface functions. */
static void ttysl_stop(ErlDrvData);
static void ttysl_from_erlang(ErlDrvData, char*, ErlDrvSizeT);
+static void ttysl_to_tty(ErlDrvData, ErlDrvEvent);
+static void ttysl_flush_tty(ErlDrvData);
static void ttysl_from_tty(ErlDrvData, ErlDrvEvent);
static void ttysl_stop_select(ErlDrvEvent, void*);
static Sint16 get_sint16(char*);
static ErlDrvPort ttysl_port;
static int ttysl_fd;
-static FILE *ttysl_out;
+static int ttysl_terminate = 0;
+static ErlDrvBinary *putcbuf;
+static int putcpos;
+static int putclen;
/* Functions that work on the line buffer. */
static int start_lbuf(void);
@@ -201,22 +221,22 @@ struct erl_drv_entry ttsl_driver_entry = {
IF_IMPL(ttysl_stop),
IF_IMPL(ttysl_from_erlang),
IF_IMPL(ttysl_from_tty),
- NULL,
- "tty_sl",
- NULL,
- NULL,
+ IF_IMPL(ttysl_to_tty),
+ "tty_sl", /* driver_name */
+ NULL, /* finish */
+ NULL, /* handle */
IF_IMPL(ttysl_control),
NULL, /* timeout */
NULL, /* outputv */
NULL, /* ready_async */
- NULL, /* flush */
+ IF_IMPL(ttysl_flush_tty),
NULL, /* call */
NULL, /* event */
ERL_DRV_EXTENDED_MARKER,
ERL_DRV_EXTENDED_MAJOR_VERSION,
ERL_DRV_EXTENDED_MINOR_VERSION,
0, /* ERL_DRV_FLAGs */
- NULL,
+ NULL, /* handle2 */
NULL, /* process_exit */
IF_IMPL(ttysl_stop_select)
};
@@ -296,8 +316,7 @@ static ErlDrvData ttysl_start(ErlDrvPort port, char* buf)
return ERL_DRV_ERROR_GENERAL;
}
- /* Open the terminal and set the terminal */
- ttysl_out = fdopen(ttysl_fd, "w");
+ SET_NONBLOCKING(ttysl_fd);
#ifdef PRIMITIVE_UTF8_CHECK
setlocale(LC_CTYPE, ""); /* Set international environment,
@@ -400,12 +419,14 @@ static void ttysl_stop(ErlDrvData ttysl_data)
stop_lbuf();
stop_termcap();
tty_reset(ttysl_fd);
- driver_select(ttysl_port, (ErlDrvEvent)(UWord)ttysl_fd, ERL_DRV_READ|ERL_DRV_USE, 0);
+ driver_select(ttysl_port, (ErlDrvEvent)(UWord)ttysl_fd,
+ ERL_DRV_WRITE|ERL_DRV_READ|ERL_DRV_USE, 0);
sys_sigset(SIGCONT, SIG_DFL);
sys_sigset(SIGWINCH, SIG_DFL);
}
ttysl_port = (ErlDrvPort)-1;
ttysl_fd = -1;
+ ttysl_terminate = 0;
/* return TRUE; */
}
@@ -650,6 +671,14 @@ static int check_buf_size(byte *s, int n)
static void ttysl_from_erlang(ErlDrvData ttysl_data, char* buf, ErlDrvSizeT count)
{
+ ErlDrvSizeT sz;
+
+ sz = driver_sizeq(ttysl_port);
+
+ putclen = count > TTY_BUFFSIZE ? TTY_BUFFSIZE : count;
+ putcbuf = driver_alloc_binary(putclen);
+ putcpos = 0;
+
if (lpos > MAXSIZE)
put_chars((byte*)"\n", 1);
@@ -678,10 +707,78 @@ static void ttysl_from_erlang(ErlDrvData ttysl_data, char* buf, ErlDrvSizeT coun
/* Unknown op, just ignore. */
break;
}
- fflush(ttysl_out);
+
+ driver_enq_bin(ttysl_port,putcbuf,0,putcpos);
+
+ if (sz == 0) {
+ for (;;) {
+ int written, qlen;
+ SysIOVec *iov;
+
+ iov = driver_peekq(ttysl_port,&qlen);
+ if (iov)
+ written = writev(ttysl_fd, iov, qlen > MAXIOV ? MAXIOV : qlen);
+ else
+ written = 0;
+ if (written < 0) {
+ if (errno == EAGAIN) {
+ driver_select(ttysl_port,(ErlDrvEvent)(long)ttysl_fd,
+ ERL_DRV_USE|ERL_DRV_WRITE,1);
+ break;
+ } else {
+ /* we ignore all other errors */
+ break;
+ }
+ } else {
+ if (driver_deq(ttysl_port, written) == 0)
+ break;
+ }
+ }
+ }
+
return; /* TRUE; */
}
+static void ttysl_to_tty(ErlDrvData ttysl_data, ErlDrvEvent fd) {
+ for (;;) {
+ int written, qlen;
+ SysIOVec *iov;
+ ErlDrvSizeT sz;
+
+ iov = driver_peekq(ttysl_port,&qlen);
+ if (iov)
+ written = writev(ttysl_fd, iov, qlen > MAXIOV ? MAXIOV : qlen);
+ else
+ written = 0;
+ if (written < 0) {
+ if (errno == EAGAIN) {
+ break;
+ } else {
+ /* we ignore all other errors */
+ }
+ } else {
+ sz = driver_deq(ttysl_port, written);
+ if (sz == 0) {
+ driver_select(ttysl_port,(ErlDrvEvent)(long)ttysl_fd,
+ ERL_DRV_WRITE,0);
+ if (ttysl_terminate)
+ /* flush has been called, which means we should terminate
+ when queue is empty. This will not send any exit
+ message */
+ driver_failure_atom(ttysl_port, "normal");
+ break;
+ }
+ }
+ }
+
+ return;
+}
+
+static void ttysl_flush_tty(ErlDrvData ttysl_data) {
+ ttysl_terminate = 1;
+ return;
+}
+
static void ttysl_from_tty(ErlDrvData ttysl_data, ErlDrvEvent fd)
{
byte b[1024];
@@ -1070,7 +1167,14 @@ static int write_buf(Uint32 *s, int n)
/* The basic procedure for outputting one character. */
static int outc(int c)
{
- return (int)putc(c, ttysl_out);
+ putcbuf->orig_bytes[putcpos++] = c;
+ if (putcpos == putclen) {
+ driver_enq_bin(ttysl_port,putcbuf,0,putclen);
+ putcpos = 0;
+ putclen = TTY_BUFFSIZE;
+ putcbuf = driver_alloc_binary(BUFSIZ);
+ }
+ return 1;
}
static int move_cursor(int from, int to)
diff --git a/erts/emulator/sys/unix/sys.c b/erts/emulator/sys/unix/sys.c
index c3d7440409..ad8b60fe7c 100644
--- a/erts/emulator/sys/unix/sys.c
+++ b/erts/emulator/sys/unix/sys.c
@@ -34,6 +34,7 @@
#include <termios.h>
#include <ctype.h>
#include <sys/utsname.h>
+#include <sys/select.h>
#ifdef ISC32
#include <sys/bsdtypes.h>
@@ -2658,18 +2659,30 @@ void sys_preload_end(Preload* p)
/* Nothing */
}
-/* Read a key from console (?) */
-
+/* Read a key from console, used by break.c
+ Here we assume that all schedulers are stopped so that erl_poll
+ does not interfere with the select below.
+*/
int sys_get_key(fd)
int fd;
{
- int c;
+ int c, ret;
unsigned char rbuf[64];
+ fd_set fds;
fflush(stdout); /* Flush query ??? */
- if ((c = read(fd,rbuf,64)) <= 0) {
- return c;
+ FD_ZERO(&fds);
+ FD_SET(fd,&fds);
+
+ ret = select(fd+1, &fds, NULL, NULL, NULL);
+
+ if (ret == 1) {
+ do {
+ c = read(fd,rbuf,64);
+ } while (c < 0 && errno == EAGAIN);
+ if (c <= 0)
+ return c;
}
return rbuf[0];
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 10:00:22 +0000