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Diffstat (limited to 'erts/emulator/drivers/unix/ttsl_drv.c')
-rw-r--r--erts/emulator/drivers/unix/ttsl_drv.c357
1 files changed, 276 insertions, 81 deletions
diff --git a/erts/emulator/drivers/unix/ttsl_drv.c b/erts/emulator/drivers/unix/ttsl_drv.c
index 1e436830e7..e425b99f16 100644
--- a/erts/emulator/drivers/unix/ttsl_drv.c
+++ b/erts/emulator/drivers/unix/ttsl_drv.c
@@ -1,18 +1,19 @@
/*
* %CopyrightBegin%
*
- * Copyright Ericsson AB 1996-2013. All Rights Reserved.
+ * Copyright Ericsson AB 1996-2016. All Rights Reserved.
*
- * The contents of this file are subject to the Erlang Public License,
- * Version 1.1, (the "License"); you may not use this file except in
- * compliance with the License. You should have received a copy of the
- * Erlang Public License along with this software. If not, it can be
- * retrieved online at http://www.erlang.org/.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
*
- * Software distributed under the License is distributed on an "AS IS"
- * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
- * the License for the specific language governing rights and limitations
- * under the License.
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
*
* %CopyrightEnd%
*/
@@ -32,6 +33,10 @@ 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 +44,7 @@ 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 +63,14 @@ 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
@@ -80,12 +94,15 @@ static volatile int cols_needs_update = FALSE;
#define OP_INSC 2
#define OP_DELC 3
#define OP_BEEP 4
+#define OP_PUTC_SYNC 5
/* Control op */
#define CTRL_OP_GET_WINSIZE 100
#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 +130,19 @@ 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 int ttysl_send_ok = 0;
+static ErlDrvBinary *putcbuf;
+static int putcpos;
+static int putclen;
/* Functions that work on the line buffer. */
static int start_lbuf(void);
@@ -176,7 +199,7 @@ static void my_debug_printf(char *fmt, ...)
erts_vsnprintf(buffer,1024,fmt,args);
va_end(args);
erts_fprintf(debuglog,"%s\n",buffer);
- //erts_printf("Debuglog = %s\n",buffer);
+ /*erts_printf("Debuglog = %s\n",buffer);*/
}
#else
@@ -201,22 +224,22 @@ 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)
};
@@ -238,7 +261,7 @@ static int ttysl_init(void)
if (debuglog != NULL)
setbuf(debuglog,NULL);
}
- DEBUGLOG(("Debuglog = %s(0x%ld)\n",dl,(long) debuglog));
+ DEBUGLOG(("ttysl_init: Debuglog = %s(0x%ld)\n",dl,(long) debuglog));
}
#endif
return 0;
@@ -254,36 +277,46 @@ static ErlDrvData ttysl_start(ErlDrvPort port, char* buf)
int flag;
extern int using_oldshell; /* set this to let the rest of erts know */
+ DEBUGLOG(("ttysl_start: driver input \"%s\", ttysl_port = %d (-1 expected)", buf, ttysl_port));
utf8buf_size = 0;
- if (ttysl_port != (ErlDrvPort)-1)
- return ERL_DRV_ERROR_GENERAL;
+ if (ttysl_port != (ErlDrvPort)-1) {
+ DEBUGLOG(("ttysl_start: failure with ttysl_port = %d, not initialized properly?\n", ttysl_port));
+ return ERL_DRV_ERROR_GENERAL;
+ }
- if (!isatty(0) || !isatty(1))
+ DEBUGLOG(("ttysl_start: isatty(0) = %d (1 expected), isatty(1) = %d (1 expected)", isatty(0), isatty(1)));
+ if (!isatty(0) || !isatty(1)) {
+ DEBUGLOG(("ttysl_start: failure in isatty, isatty(0) = %d, isatty(1) = %d", isatty(0), isatty(1)));
return ERL_DRV_ERROR_GENERAL;
+ }
/* Set the terminal modes to default leave as is. */
canon = echo = sig = 0;
/* Parse the input parameters. */
for (s = strchr(buf, ' '); s; s = t) {
- s++;
- /* Find end of this argument (start of next) and insert NUL. */
- if ((t = strchr(s, ' '))) {
- *t = '\0';
- }
- if ((flag = ((*s == '+') ? 1 : ((*s == '-') ? -1 : 0)))) {
- if (s[1] == 'c') canon = flag;
- if (s[1] == 'e') echo = flag;
- if (s[1] == 's') sig = flag;
- }
- else if ((ttysl_fd = open(s, O_RDWR, 0)) < 0)
- return ERL_DRV_ERROR_GENERAL;
+ s++;
+ /* Find end of this argument (start of next) and insert NUL. */
+ if ((t = strchr(s, ' '))) {
+ *t = '\0';
+ }
+ if ((flag = ((*s == '+') ? 1 : ((*s == '-') ? -1 : 0)))) {
+ if (s[1] == 'c') canon = flag;
+ if (s[1] == 'e') echo = flag;
+ if (s[1] == 's') sig = flag;
+ }
+ else if ((ttysl_fd = open(s, O_RDWR, 0)) < 0) {
+ DEBUGLOG(("ttysl_start: failed to open ttysl_fd, open(%s, O_RDWR, 0)) = %d\n", s, ttysl_fd));
+ return ERL_DRV_ERROR_GENERAL;
+ }
}
+
if (ttysl_fd < 0)
ttysl_fd = 0;
if (tty_init(ttysl_fd, canon, echo, sig) < 0 ||
- tty_set(ttysl_fd) < 0) {
+ tty_set(ttysl_fd) < 0) {
+ DEBUGLOG(("ttysl_start: failed init tty or set tty\n"));
ttysl_port = (ErlDrvPort)-1;
tty_reset(ttysl_fd);
return ERL_DRV_ERROR_GENERAL;
@@ -291,13 +324,13 @@ static ErlDrvData ttysl_start(ErlDrvPort port, char* buf)
/* Set up smart line and termcap stuff. */
if (!start_lbuf() || !start_termcap()) {
+ DEBUGLOG(("ttysl_start: failed to start_lbuf or start_termcap\n"));
stop_lbuf(); /* Must free this */
tty_reset(ttysl_fd);
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,
@@ -313,12 +346,12 @@ static ErlDrvData ttysl_start(ErlDrvPort port, char* buf)
l = setlocale(LC_CTYPE, ""); /* Set international environment */
if (l != NULL) {
utf8_mode = (strcmp(nl_langinfo(CODESET), "UTF-8") == 0);
- DEBUGLOG(("setlocale: %s\n",l));
+ DEBUGLOG(("ttysl_start: setlocale: %s",l));
}
#endif
- DEBUGLOG(("utf8_mode is %s\n",(utf8_mode) ? "on" : "off"));
- sys_sigset(SIGCONT, cont);
- sys_sigset(SIGWINCH, winch);
+ DEBUGLOG(("ttysl_start: utf8_mode is %s",(utf8_mode) ? "on" : "off"));
+ sys_signal(SIGCONT, cont);
+ sys_signal(SIGWINCH, winch);
driver_select(port, (ErlDrvEvent)(UWord)ttysl_fd, ERL_DRV_READ|ERL_DRV_USE, 1);
ttysl_port = port;
@@ -326,6 +359,7 @@ static ErlDrvData ttysl_start(ErlDrvPort port, char* buf)
/* we need to know this when we enter the break handler */
using_oldshell = 0;
+ DEBUGLOG(("ttysl_start: successful start\n"));
return (ErlDrvData)ttysl_port; /* Nothing important to return */
#endif /* HAVE_TERMCAP */
}
@@ -396,16 +430,19 @@ static ErlDrvSSizeT ttysl_control(ErlDrvData drv_data,
static void ttysl_stop(ErlDrvData ttysl_data)
{
+ DEBUGLOG(("ttysl_stop: ttysl_port = %d\n",ttysl_port));
if (ttysl_port != (ErlDrvPort)-1) {
stop_lbuf();
stop_termcap();
tty_reset(ttysl_fd);
- driver_select(ttysl_port, (ErlDrvEvent)(UWord)ttysl_fd, ERL_DRV_READ|ERL_DRV_USE, 0);
- sys_sigset(SIGCONT, SIG_DFL);
- sys_sigset(SIGWINCH, SIG_DFL);
+ driver_select(ttysl_port, (ErlDrvEvent)(UWord)ttysl_fd,
+ ERL_DRV_WRITE|ERL_DRV_READ|ERL_DRV_USE, 0);
+ sys_signal(SIGCONT, SIG_DFL);
+ sys_signal(SIGWINCH, SIG_DFL);
}
ttysl_port = (ErlDrvPort)-1;
ttysl_fd = -1;
+ ttysl_terminate = 0;
/* return TRUE; */
}
@@ -593,12 +630,13 @@ static int check_buf_size(byte *s, int n)
int ch;
int size = 10;
+ DEBUGLOG(("check_buf_size: n = %d",n));
while(pos < n) {
/* Indata is always UTF-8 */
if ((ch = pick_utf8(s,n,&pos)) < 0) {
/* XXX temporary allow invalid chars */
ch = (int) s[pos];
- DEBUGLOG(("Invalid UTF8:%d",ch));
+ DEBUGLOG(("check_buf_size: Invalid UTF8:%d",ch));
++pos;
}
if (utf8_mode) { /* That is, terminal is UTF8 compliant */
@@ -606,7 +644,7 @@ static int check_buf_size(byte *s, int n)
#ifdef HAVE_WCWIDTH
int width;
#endif
- DEBUGLOG(("Printable(UTF-8:%d):%d",pos,ch));
+ DEBUGLOG(("check_buf_size: Printable(UTF-8:%d):%d",pos,ch));
size++;
#ifdef HAVE_WCWIDTH
if ((width = wcwidth(ch)) > 1) {
@@ -616,21 +654,21 @@ static int check_buf_size(byte *s, int n)
} else if (ch == '\t') {
size += 8;
} else {
- DEBUGLOG(("Magic(UTF-8:%d):%d",pos,ch));
+ DEBUGLOG(("check_buf_size: Magic(UTF-8:%d):%d",pos,ch));
size += 2;
}
} else {
if (ch <= 255 && isprint(ch)) {
- DEBUGLOG(("Printable:%d",ch));
+ DEBUGLOG(("check_buf_size: Printable:%d",ch));
size++;
} else if (ch == '\t')
size += 8;
else if (ch >= 128) {
- DEBUGLOG(("Non printable:%d",ch));
+ DEBUGLOG(("check_buf_size: Non printable:%d",ch));
size += (octal_or_hex_positions(ch) + 1);
}
else {
- DEBUGLOG(("Magic:%d",ch));
+ DEBUGLOG(("check_buf_size: Magic:%d",ch));
size += 2;
}
}
@@ -640,22 +678,42 @@ static int check_buf_size(byte *s, int n)
lbuf_size = size + lpos + BUFSIZ;
if ((lbuf = driver_realloc(lbuf, lbuf_size * sizeof(Uint32))) == NULL) {
+ DEBUGLOG(("check_buf_size: alloc failure of %d bytes", lbuf_size * sizeof(Uint32)));
driver_failure(ttysl_port, -1);
return(0);
}
}
+ DEBUGLOG(("check_buf_size: success\n"));
return(1);
}
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);
+ DEBUGLOG(("ttysl_from_erlang: OP = %d", buf[0]));
+
switch (buf[0]) {
+ case OP_PUTC_SYNC:
+ /* Using sync means that we have to send an ok to the
+ controlling process for each command call. We delay
+ sending ok if the driver queue exceeds a certain size.
+ We do not set ourselves as a busy port, as this
+ could be very bad for user_drv, if it gets blocked on
+ the port_command. */
+ /* fall through */
case OP_PUTC:
- DEBUGLOG(("OP: Putc(%lu)",(unsigned long) count-1));
+ DEBUGLOG(("ttysl_from_erlang: OP: Putc(%lu)",(unsigned long) count-1));
if (check_buf_size((byte*)buf+1, count-1) == 0)
return;
put_chars((byte*)buf+1, count-1);
@@ -678,10 +736,114 @@ 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);
+ driver_free_binary(putcbuf);
+
+ 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 == ERRNO_BLOCK || errno == EINTR) {
+ driver_select(ttysl_port,(ErlDrvEvent)(long)ttysl_fd,
+ ERL_DRV_USE|ERL_DRV_WRITE,1);
+ break;
+ } else {
+ DEBUGLOG(("ttysl_from_erlang: driver failure in writev(%d,..) = %d (errno = %d)\n", ttysl_fd, written, errno));
+ driver_failure_posix(ttysl_port, errno);
+ return;
+ }
+ } else {
+ if (driver_deq(ttysl_port, written) == 0)
+ break;
+ }
+ }
+ }
+
+ if (buf[0] == OP_PUTC_SYNC) {
+ if (driver_sizeq(ttysl_port) > TTY_BUFFSIZE && !ttysl_terminate) {
+ /* We delay sending the ack until the buffer has been consumed */
+ ttysl_send_ok = 1;
+ } else {
+ ErlDrvTermData spec[] = {
+ ERL_DRV_PORT, driver_mk_port(ttysl_port),
+ ERL_DRV_ATOM, driver_mk_atom("ok"),
+ ERL_DRV_TUPLE, 2
+ };
+ ASSERT(ttysl_send_ok == 0);
+ erl_drv_output_term(driver_mk_port(ttysl_port), spec,
+ sizeof(spec) / sizeof(spec[0]));
+ }
+ }
+
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);
+
+ DEBUGLOG(("ttysl_to_tty: qlen = %d", qlen));
+
+ if (iov)
+ written = writev(ttysl_fd, iov, qlen > MAXIOV ? MAXIOV : qlen);
+ else
+ written = 0;
+ if (written < 0) {
+ if (errno == EINTR) {
+ continue;
+ } else if (errno != ERRNO_BLOCK){
+ DEBUGLOG(("ttysl_to_tty: driver failure in writev(%d,..) = %d (errno = %d)\n", ttysl_fd, written, errno));
+ driver_failure_posix(ttysl_port, errno);
+ }
+ break;
+ } else {
+ sz = driver_deq(ttysl_port, written);
+ if (sz < TTY_BUFFSIZE && ttysl_send_ok) {
+ ErlDrvTermData spec[] = {
+ ERL_DRV_PORT, driver_mk_port(ttysl_port),
+ ERL_DRV_ATOM, driver_mk_atom("ok"),
+ ERL_DRV_TUPLE, 2
+ };
+ ttysl_send_ok = 0;
+ erl_drv_output_term(driver_mk_port(ttysl_port), spec,
+ sizeof(spec) / sizeof(spec[0]));
+ }
+ 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 */
+ DEBUGLOG(("ttysl_to_tty: ttysl_terminate normal\n"));
+ driver_failure_atom(ttysl_port, "normal");
+ }
+ break;
+ }
+ }
+ }
+
+ return;
+}
+
+static void ttysl_flush_tty(ErlDrvData ttysl_data) {
+ DEBUGLOG(("ttysl_flush_tty: .."));
+ ttysl_terminate = 1;
+ return;
+}
+
static void ttysl_from_tty(ErlDrvData ttysl_data, ErlDrvEvent fd)
{
byte b[1024];
@@ -698,6 +860,8 @@ static void ttysl_from_tty(ErlDrvData ttysl_data, ErlDrvEvent fd)
p += utf8buf_size;
utf8buf_size = 0;
}
+
+ DEBUGLOG(("ttysl_from_tty: remainder = %d", left));
if ((i = read((int)(SWord)fd, (char *) p, left)) >= 0) {
if (p != b) {
@@ -711,7 +875,7 @@ static void ttysl_from_tty(ErlDrvData ttysl_data, ErlDrvEvent fd)
utf8buf_size = i -pos;
memcpy(utf8buf,b+pos,utf8buf_size);
} else if (ch == -1) {
- DEBUGLOG(("Giving up on UTF8 mode, invalid character"));
+ DEBUGLOG(("ttysl_from_tty: Giving up on UTF8 mode, invalid character"));
utf8_mode = 0;
goto latin_terminal;
}
@@ -728,6 +892,7 @@ static void ttysl_from_tty(ErlDrvData ttysl_data, ErlDrvEvent fd)
}
}
} else {
+ DEBUGLOG(("ttysl_from_tty: driver failure in read(%d,..) = %d\n", (int)(SWord)fd, i));
driver_failure(ttysl_port, -1);
}
}
@@ -745,7 +910,7 @@ static Sint16 get_sint16(char *s)
{
return ((*s << 8) | ((byte*)s)[1]);
}
-
+
static int start_lbuf(void)
{
if (!lbuf && !(lbuf = ( Uint32*) driver_alloc(lbuf_size * sizeof(Uint32))))
@@ -1019,7 +1184,7 @@ static int write_buf(Uint32 *s, int n)
byte *octbuff;
byte octtmp[256];
int octbytes;
- DEBUGLOG(("Escaped: %d", ch));
+ DEBUGLOG(("write_buf: Escaped: %d", ch));
octbytes = octal_or_hex_positions(ch);
if (octbytes > 256) {
octbuff = driver_alloc(octbytes);
@@ -1028,11 +1193,11 @@ static int write_buf(Uint32 *s, int n)
}
octbytes = 0;
octal_or_hex_format(ch, octbuff, &octbytes);
- DEBUGLOG(("octbytes: %d", octbytes));
+ DEBUGLOG(("write_buf: octbytes: %d", octbytes));
outc('\\');
for (i = 0; i < octbytes; ++i) {
outc(lastput = octbuff[i]);
- DEBUGLOG(("outc: %d", (int) lastput));
+ DEBUGLOG(("write_buf: outc: %d", (int) lastput));
}
n -= octbytes+1;
s += octbytes+1;
@@ -1044,7 +1209,7 @@ static int write_buf(Uint32 *s, int n)
--n; s++;
#endif
} else {
- DEBUGLOG(("Very unexpected character %d",(int) *s));
+ DEBUGLOG(("write_buf: Very unexpected character %d",(int) *s));
++n;
--s;
}
@@ -1070,7 +1235,15 @@ 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);
+ driver_free_binary(putcbuf);
+ putcpos = 0;
+ putclen = TTY_BUFFSIZE;
+ putcbuf = driver_alloc_binary(BUFSIZ);
+ }
+ return 1;
}
static int move_cursor(int from, int to)
@@ -1091,13 +1264,16 @@ static int move_cursor(int from, int to)
move_left(-dc);
return TRUE;
}
-
+
static int start_termcap(void)
{
int eres;
size_t envsz = 1024;
char *env = NULL;
char *c;
+ int tres;
+
+ DEBUGLOG(("start_termcap: .."));
capbuf = driver_alloc(1024);
if (!capbuf)
@@ -1105,9 +1281,10 @@ static int start_termcap(void)
eres = erl_drv_getenv("TERM", capbuf, &envsz);
if (eres == 0)
env = capbuf;
- else if (eres < 0)
+ else if (eres < 0) {
+ DEBUGLOG(("start_termcap: failure in erl_drv_getenv(\"TERM\", ..) = %d\n", eres));
goto false;
- else /* if (eres > 1) */ {
+ } else /* if (eres > 1) */ {
char *envbuf = driver_alloc(envsz);
if (!envbuf)
goto false;
@@ -1117,7 +1294,8 @@ static int start_termcap(void)
if (eres == 0)
break;
newenvbuf = driver_realloc(envbuf, envsz);
- if (eres < 0 || !newenvbuf) {
+ if (eres < 0 || !newenvbuf) {
+ DEBUGLOG(("start_termcap: failure in erl_drv_getenv(\"TERM\", ..) = %d or realloc buf == %p\n", eres, newenvbuf));
env = newenvbuf ? newenvbuf : envbuf;
goto false;
}
@@ -1125,8 +1303,10 @@ static int start_termcap(void)
}
env = envbuf;
}
- if (tgetent((char*)lbuf, env) <= 0)
- goto false;
+ if ((tres = tgetent((char*)lbuf, env)) <= 0) {
+ DEBUGLOG(("start_termcap: failure in tgetent(..) = %d\n", tres));
+ goto false;
+ }
if (env != capbuf) {
env = NULL;
driver_free(env);
@@ -1142,8 +1322,11 @@ static int start_termcap(void)
if (!(left = tgetflag("bs") ? "\b" : tgetstr("bc", &c)))
left = "\b"; /* Can't happen - but does on Solaris 2 */
right = tgetstr("nd", &c);
- if (up && down && left && right)
- return TRUE;
+ if (up && down && left && right) {
+ DEBUGLOG(("start_termcap: successful start\n"));
+ return TRUE;
+ }
+ DEBUGLOG(("start_termcap: failed start\n"));
false:
if (env && env != capbuf)
driver_free(env);
@@ -1187,7 +1370,7 @@ static int move_down(int n)
tputs(down, 1, outc);
return TRUE;
}
-
+
/*
* Updates cols if terminal has resized (SIGWINCH). Should be called
@@ -1209,7 +1392,7 @@ static void update_cols(void)
cols = width;
}
}
-
+
/*
* Put a terminal device into non-canonical mode with ECHO off.
@@ -1220,10 +1403,13 @@ static void update_cols(void)
static struct termios tty_smode, tty_rmode;
-static int tty_init(int fd, int canon, int echo, int sig)
-{
- if (tcgetattr(fd, &tty_rmode) < 0)
- return -1;
+static int tty_init(int fd, int canon, int echo, int sig) {
+ int tres;
+ DEBUGLOG(("tty_init: fd = %d, canon = %d, echo = %d, sig = %d", fd, canon, echo, sig));
+ if ((tres = tcgetattr(fd, &tty_rmode)) < 0) {
+ DEBUGLOG(("tty_init: failure in tcgetattr(%d,..) = %d\n", fd, tres));
+ return -1;
+ }
tty_smode = tty_rmode;
/* Default characteristics for all usage including termcap output. */
@@ -1276,6 +1462,7 @@ static int tty_init(int fd, int canon, int echo, int sig)
#endif
tty_smode.c_lflag &= ~(ISIG|IEXTEN);
}
+ DEBUGLOG(("tty_init: successful init\n"));
return 0;
}
@@ -1286,20 +1473,25 @@ static int tty_init(int fd, int canon, int echo, int sig)
static int tty_set(int fd)
{
- DEBUGF(("Setting tty...\n"));
+ int tres;
+ DEBUGF(("tty_set: Setting tty...\n"));
- if (tcsetattr(fd, TCSANOW, &tty_smode) < 0)
+ if ((tres = tcsetattr(fd, TCSANOW, &tty_smode)) < 0) {
+ DEBUGLOG(("tty_set: failure in tcgetattr(%d,..) = %d\n", fd, tres));
return(-1);
+ }
return(0);
}
static int tty_reset(int fd) /* of terminal device */
{
- DEBUGF(("Resetting tty...\n"));
+ int tres;
+ DEBUGF(("tty_reset: Resetting tty...\n"));
- if (tcsetattr(fd, TCSANOW, &tty_rmode) < 0)
+ if ((tres = tcsetattr(fd, TCSANOW, &tty_rmode)) < 0) {
+ DEBUGLOG(("tty_reset: failure in tcsetattr(%d,..) = %d\n", fd, tres));
return(-1);
-
+ }
return(0);
}
@@ -1314,17 +1506,19 @@ static int tty_reset(int fd) /* of terminal device */
static RETSIGTYPE suspend(int sig)
{
if (tty_reset(ttysl_fd) < 0) {
+ DEBUGLOG(("signal: failure in suspend(%d), can't reset tty %d\n", sig, ttysl_fd));
fprintf(stderr,"Can't reset tty \n");
exit(1);
}
- sys_sigset(sig, SIG_DFL); /* Set signal handler to default */
+ sys_signal(sig, SIG_DFL); /* Set signal handler to default */
sys_sigrelease(sig); /* Allow 'sig' to come through */
kill(getpid(), sig); /* Send ourselves the signal */
sys_sigblock(sig); /* Reset to old mask */
- sys_sigset(sig, suspend); /* Reset signal handler */
+ sys_signal(sig, suspend); /* Reset signal handler */
if (tty_set(ttysl_fd) < 0) {
+ DEBUGLOG(("signal: failure in suspend(%d), can't set tty %d\n", sig, ttysl_fd));
fprintf(stderr,"Can't set tty raw \n");
exit(1);
}
@@ -1335,6 +1529,7 @@ static RETSIGTYPE suspend(int sig)
static RETSIGTYPE cont(int sig)
{
if (tty_set(ttysl_fd) < 0) {
+ DEBUGLOG(("signal: failure in cont(%d), can't set tty raw %d\n", sig, ttysl_fd));
fprintf(stderr,"Can't set tty raw\n");
exit(1);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-30 09:40:14 +0000