/* Serial interface for local (hardwired) serial ports on Un*x like systems
- Copyright 1992, 1993, 1994, 1998 Free Software Foundation, Inc.
+ Copyright 1992, 1993, 1994, 1998-1999 Free Software Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "serial.h"
+#include "ser-unix.h"
+
#include <fcntl.h>
#include <sys/types.h>
#include "terminal.h"
+#ifdef HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#endif
+#include <sys/socket.h>
+#include <sys/time.h>
+
+#include "gdb_string.h"
+#include "event-loop.h"
+
#ifdef HAVE_TERMIOS
#endif /* termio */
#ifdef HAVE_SGTTY
-/* Needed for the code which uses select(). We would include <sys/select.h>
- too if it existed on all systems. */
-#include <sys/time.h>
-
struct hardwire_ttystate
{
struct sgttyb sgttyb;
};
#endif /* sgtty */
-static int hardwire_open PARAMS ((serial_t scb, const char *name));
-static void hardwire_raw PARAMS ((serial_t scb));
-static int wait_for PARAMS ((serial_t scb, int timeout));
-static int hardwire_readchar PARAMS ((serial_t scb, int timeout));
-static int rate_to_code PARAMS ((int rate));
-static int hardwire_setbaudrate PARAMS ((serial_t scb, int rate));
-static int hardwire_write PARAMS ((serial_t scb, const char *str, int len));
-static void hardwire_close PARAMS ((serial_t scb));
-static int get_tty_state PARAMS ((serial_t scb, struct hardwire_ttystate * state));
-static int set_tty_state PARAMS ((serial_t scb, struct hardwire_ttystate * state));
-static serial_ttystate hardwire_get_tty_state PARAMS ((serial_t scb));
-static int hardwire_set_tty_state PARAMS ((serial_t scb, serial_ttystate state));
-static int hardwire_noflush_set_tty_state PARAMS ((serial_t, serial_ttystate,
- serial_ttystate));
-static void hardwire_print_tty_state PARAMS ((serial_t, serial_ttystate));
-static int hardwire_drain_output PARAMS ((serial_t));
-static int hardwire_flush_output PARAMS ((serial_t));
-static int hardwire_flush_input PARAMS ((serial_t));
-static int hardwire_send_break PARAMS ((serial_t));
-static int hardwire_setstopbits PARAMS ((serial_t, int));
-
-void _initialize_ser_hardwire PARAMS ((void));
-
-extern int (*ui_loop_hook) PARAMS ((int));
+static int hardwire_open (serial_t scb, const char *name);
+static void hardwire_raw (serial_t scb);
+static int wait_for (serial_t scb, int timeout);
+static int hardwire_readchar (serial_t scb, int timeout);
+static int rate_to_code (int rate);
+static int hardwire_setbaudrate (serial_t scb, int rate);
+static int hardwire_write (serial_t scb, const char *str, int len);
+static void hardwire_close (serial_t scb);
+static int get_tty_state (serial_t scb, struct hardwire_ttystate * state);
+static int set_tty_state (serial_t scb, struct hardwire_ttystate * state);
+static serial_ttystate hardwire_get_tty_state (serial_t scb);
+static int hardwire_set_tty_state (serial_t scb, serial_ttystate state);
+static int hardwire_noflush_set_tty_state (serial_t, serial_ttystate,
+ serial_ttystate);
+static void hardwire_print_tty_state (serial_t, serial_ttystate, struct gdb_file *);
+static int hardwire_drain_output (serial_t);
+static int hardwire_flush_output (serial_t);
+static int hardwire_flush_input (serial_t);
+static int hardwire_send_break (serial_t);
+static int hardwire_setstopbits (serial_t, int);
+
+void _initialize_ser_hardwire (void);
+
+extern int (*ui_loop_hook) (int);
/* Open up a real live device for serial I/O */
static int
-hardwire_open (scb, name)
- serial_t scb;
- const char *name;
+hardwire_open (serial_t scb, const char *name)
{
scb->fd = open (name, O_RDWR);
if (scb->fd < 0)
}
static int
-get_tty_state (scb, state)
- serial_t scb;
- struct hardwire_ttystate *state;
+get_tty_state (serial_t scb, struct hardwire_ttystate *state)
{
#ifdef HAVE_TERMIOS
if (tcgetattr (scb->fd, &state->termios) < 0)
}
static int
-set_tty_state (scb, state)
- serial_t scb;
- struct hardwire_ttystate *state;
+set_tty_state (serial_t scb, struct hardwire_ttystate *state)
{
#ifdef HAVE_TERMIOS
if (tcsetattr (scb->fd, TCSANOW, &state->termios) < 0)
}
static serial_ttystate
-hardwire_get_tty_state (scb)
- serial_t scb;
+hardwire_get_tty_state (serial_t scb)
{
struct hardwire_ttystate *state;
}
static int
-hardwire_set_tty_state (scb, ttystate)
- serial_t scb;
- serial_ttystate ttystate;
+hardwire_set_tty_state (serial_t scb, serial_ttystate ttystate)
{
struct hardwire_ttystate *state;
}
static int
-hardwire_noflush_set_tty_state (scb, new_ttystate, old_ttystate)
- serial_t scb;
- serial_ttystate new_ttystate;
- serial_ttystate old_ttystate;
+hardwire_noflush_set_tty_state (serial_t scb,
+ serial_ttystate new_ttystate,
+ serial_ttystate old_ttystate)
{
struct hardwire_ttystate new_state;
#ifdef HAVE_SGTTY
}
static void
-hardwire_print_tty_state (scb, ttystate)
- serial_t scb;
- serial_ttystate ttystate;
+hardwire_print_tty_state (serial_t scb,
+ serial_ttystate ttystate,
+ struct gdb_file *stream)
{
struct hardwire_ttystate *state = (struct hardwire_ttystate *) ttystate;
int i;
#ifdef HAVE_TERMIOS
- printf_filtered ("c_iflag = 0x%x, c_oflag = 0x%x,\n",
- state->termios.c_iflag, state->termios.c_oflag);
- printf_filtered ("c_cflag = 0x%x, c_lflag = 0x%x\n",
- state->termios.c_cflag, state->termios.c_lflag);
+ fprintf_filtered (stream, "c_iflag = 0x%x, c_oflag = 0x%x,\n",
+ state->termios.c_iflag, state->termios.c_oflag);
+ fprintf_filtered (stream, "c_cflag = 0x%x, c_lflag = 0x%x\n",
+ state->termios.c_cflag, state->termios.c_lflag);
#if 0
/* This not in POSIX, and is not really documented by those systems
which have it (at least not Sun). */
- printf_filtered ("c_line = 0x%x.\n", state->termios.c_line);
+ fprintf_filtered (stream, "c_line = 0x%x.\n", state->termios.c_line);
#endif
- printf_filtered ("c_cc: ");
+ fprintf_filtered (stream, "c_cc: ");
for (i = 0; i < NCCS; i += 1)
- printf_filtered ("0x%x ", state->termios.c_cc[i]);
- printf_filtered ("\n");
+ fprintf_filtered (stream, "0x%x ", state->termios.c_cc[i]);
+ fprintf_filtered (stream, "\n");
#endif
#ifdef HAVE_TERMIO
- printf_filtered ("c_iflag = 0x%x, c_oflag = 0x%x,\n",
- state->termio.c_iflag, state->termio.c_oflag);
- printf_filtered ("c_cflag = 0x%x, c_lflag = 0x%x, c_line = 0x%x.\n",
- state->termio.c_cflag, state->termio.c_lflag,
- state->termio.c_line);
- printf_filtered ("c_cc: ");
+ fprintf_filtered (stream, "c_iflag = 0x%x, c_oflag = 0x%x,\n",
+ state->termio.c_iflag, state->termio.c_oflag);
+ fprintf_filtered (stream, "c_cflag = 0x%x, c_lflag = 0x%x, c_line = 0x%x.\n",
+ state->termio.c_cflag, state->termio.c_lflag,
+ state->termio.c_line);
+ fprintf_filtered (stream, "c_cc: ");
for (i = 0; i < NCC; i += 1)
- printf_filtered ("0x%x ", state->termio.c_cc[i]);
- printf_filtered ("\n");
+ fprintf_filtered (stream, "0x%x ", state->termio.c_cc[i]);
+ fprintf_filtered (stream, "\n");
#endif
#ifdef HAVE_SGTTY
- printf_filtered ("sgttyb.sg_flags = 0x%x.\n", state->sgttyb.sg_flags);
+ fprintf_filtered (stream, "sgttyb.sg_flags = 0x%x.\n",
+ state->sgttyb.sg_flags);
- printf_filtered ("tchars: ");
+ fprintf_filtered (stream, "tchars: ");
for (i = 0; i < (int) sizeof (struct tchars); i++)
- printf_filtered ("0x%x ", ((unsigned char *) &state->tc)[i]);
- printf_filtered ("\n");
+ fprintf_filtered (stream, "0x%x ", ((unsigned char *) &state->tc)[i]);
+ fprintf_filtered ("\n");
- printf_filtered ("ltchars: ");
+ fprintf_filtered (stream, "ltchars: ");
for (i = 0; i < (int) sizeof (struct ltchars); i++)
- printf_filtered ("0x%x ", ((unsigned char *) &state->ltc)[i]);
- printf_filtered ("\n");
+ fprintf_filtered (stream, "0x%x ", ((unsigned char *) &state->ltc)[i]);
+ fprintf_filtered (stream, "\n");
- printf_filtered ("lmode: 0x%x\n", state->lmode);
+ fprintf_filtered (stream, "lmode: 0x%x\n", state->lmode);
#endif
}
/* Wait for the output to drain away, as opposed to flushing (discarding) it */
static int
-hardwire_drain_output (scb)
- serial_t scb;
+hardwire_drain_output (serial_t scb)
{
#ifdef HAVE_TERMIOS
return tcdrain (scb->fd);
}
static int
-hardwire_flush_output (scb)
- serial_t scb;
+hardwire_flush_output (serial_t scb)
{
#ifdef HAVE_TERMIOS
return tcflush (scb->fd, TCOFLUSH);
}
static int
-hardwire_flush_input (scb)
- serial_t scb;
+hardwire_flush_input (serial_t scb)
{
scb->bufcnt = 0;
scb->bufp = scb->buf;
}
static int
-hardwire_send_break (scb)
- serial_t scb;
+hardwire_send_break (serial_t scb)
{
#ifdef HAVE_TERMIOS
return tcsendbreak (scb->fd, 0);
}
static void
-hardwire_raw (scb)
- serial_t scb;
+hardwire_raw (serial_t scb)
{
struct hardwire_ttystate state;
timeout occur in the read() in hardwire_read().
*/
+/* FIXME: Don't replace this with the equivalent ser_unix*() until the
+ old TERMIOS/SGTTY/... timer code has been flushed. cagney
+ 1999-09-16. */
+
static int
-wait_for (scb, timeout)
- serial_t scb;
- int timeout;
+wait_for (serial_t scb, int timeout)
{
#ifdef HAVE_SGTTY
{
to wait, or -1 to wait forever. Use timeout of 0 to effect a poll. Returns
char if successful. Returns SERIAL_TIMEOUT if timeout expired, EOF if line
dropped dead, or SERIAL_ERROR for any other error (see errno in that case). */
+
+/* FIXME: cagney/1999-09-16: Don't replace this with the equivalent
+ ser_unix*() until the old TERMIOS/SGTTY/... timer code has been
+ flushed. */
+
+/* NOTE: cagney/1999-09-16: This function is not identical to
+ ser_unix_readchar() as part of replacing it with ser_unix*()
+ merging will be required - this code handles the case where read()
+ times out due to no data while ser_unix_readchar() doesn't expect
+ that. */
+
static int
-hardwire_readchar (scb, timeout)
- serial_t scb;
- int timeout;
+hardwire_readchar (serial_t scb, int timeout)
{
int status, delta;
int detach = 0;
if (status < 0)
return status;
- scb->bufcnt = read (scb->fd, scb->buf, BUFSIZ);
+ /* NOTE: cagney/1999-09-17: See ser_unix_readchar() for reason
+ why ASYNC reads are character by character. */
+
+ scb->bufcnt = read (scb->fd, scb->buf,
+ (SERIAL_IS_ASYNC_P (scb) ? 1 : BUFSIZ));
if (scb->bufcnt <= 0)
{
};
static int
-rate_to_code (rate)
- int rate;
+rate_to_code (int rate)
{
int i;
}
static int
-hardwire_setbaudrate (scb, rate)
- serial_t scb;
- int rate;
+hardwire_setbaudrate (serial_t scb, int rate)
{
struct hardwire_ttystate state;
return set_tty_state (scb, &state);
}
+/* FIXME: Don't replace this with the equivalent ser_unix*() until the
+ old TERMIOS/SGTTY/... timer code has been flushed. cagney
+ 1999-09-16. */
+
static int
-hardwire_write (scb, str, len)
- serial_t scb;
- const char *str;
- int len;
+hardwire_write (serial_t scb, const char *str, int len)
{
int cc;
cc = write (scb->fd, str, len);
if (cc < 0)
- return 1;
+ return 1;
len -= cc;
str += cc;
}
return 0;
}
+
static void
-hardwire_close (scb)
- serial_t scb;
+hardwire_close (serial_t scb)
{
if (scb->fd < 0)
return;
scb->fd = -1;
}
-static struct serial_ops hardwire_ops =
-{
- "hardwire",
- 0,
- hardwire_open,
- hardwire_close,
- hardwire_readchar,
- hardwire_write,
- hardwire_flush_output,
- hardwire_flush_input,
- hardwire_send_break,
- hardwire_raw,
- hardwire_get_tty_state,
- hardwire_set_tty_state,
- hardwire_print_tty_state,
- hardwire_noflush_set_tty_state,
- hardwire_setbaudrate,
- hardwire_setstopbits,
- hardwire_drain_output, /* wait for output to drain */
-};
+\f
+/* Generic operations used by all UNIX/FD based serial interfaces. */
+
+serial_ttystate
+ser_unix_nop_get_tty_state (serial_t scb)
+{
+ /* allocate a dummy */
+ return (serial_ttystate) XMALLOC (int);
+}
+
+int
+ser_unix_nop_set_tty_state (serial_t scb, serial_ttystate ttystate)
+{
+ return 0;
+}
+
+void
+ser_unix_nop_raw (serial_t scb)
+{
+ return; /* Always in raw mode */
+}
+
+/* Wait for input on scb, with timeout seconds. Returns 0 on success,
+ otherwise SERIAL_TIMEOUT or SERIAL_ERROR. */
+
+int
+ser_unix_wait_for (serial_t scb, int timeout)
+{
+ int numfds;
+ struct timeval tv;
+ fd_set readfds, exceptfds;
+
+ FD_ZERO (&readfds);
+ FD_ZERO (&exceptfds);
+
+ tv.tv_sec = timeout;
+ tv.tv_usec = 0;
+
+ FD_SET (scb->fd, &readfds);
+ FD_SET (scb->fd, &exceptfds);
+
+ while (1)
+ {
+ if (timeout >= 0)
+ numfds = select (scb->fd + 1, &readfds, 0, &exceptfds, &tv);
+ else
+ numfds = select (scb->fd + 1, &readfds, 0, &exceptfds, 0);
+
+ if (numfds <= 0)
+ {
+ if (numfds == 0)
+ return SERIAL_TIMEOUT;
+ else if (errno == EINTR)
+ continue;
+ else
+ return SERIAL_ERROR; /* Got an error from select or poll */
+ }
+
+ return 0;
+ }
+}
+
+/* Read a character with user-specified timeout. TIMEOUT is number of seconds
+ to wait, or -1 to wait forever. Use timeout of 0 to effect a poll. Returns
+ char if successful. Returns -2 if timeout expired, EOF if line dropped
+ dead, or -3 for any other error (see errno in that case). */
+
+int
+ser_unix_readchar (serial_t scb, int timeout)
+{
+ int status;
+ int delta;
+
+ if (scb->bufcnt-- > 0)
+ return *scb->bufp++;
+
+ /* We have to be able to keep the GUI alive here, so we break the original
+ timeout into steps of 1 second, running the "keep the GUI alive" hook
+ each time through the loop.
+
+ Also, timeout = 0 means to poll, so we just set the delta to 0, so we
+ will only go through the loop once. */
+
+ delta = (timeout == 0 ? 0 : 1);
+ while (1)
+ {
+
+ /* N.B. The UI may destroy our world (for instance by calling
+ remote_stop,) in which case we want to get out of here as
+ quickly as possible. It is not safe to touch scb, since
+ someone else might have freed it. The ui_loop_hook signals that
+ we should exit by returning 1. */
+
+ if (ui_loop_hook)
+ {
+ if (ui_loop_hook (0))
+ return SERIAL_TIMEOUT;
+ }
+
+ status = ser_unix_wait_for (scb, delta);
+ timeout -= delta;
+
+ /* If we got a character or an error back from wait_for, then we can
+ break from the loop before the timeout is completed. */
+
+ if (status != SERIAL_TIMEOUT)
+ {
+ break;
+ }
+
+ /* If we have exhausted the original timeout, then generate
+ a SERIAL_TIMEOUT, and pass it out of the loop. */
+
+ else if (timeout == 0)
+ {
+ status = SERIAL_TIMEOUT;
+ break;
+ }
+ }
+
+ if (status < 0)
+ return status;
+
+ while (1)
+ {
+ /* FIXME: cagney/1999-09-17: ASYNC: The ASYNC serial code needs
+ to be modified so that it agressivly tries to drain its local
+ input buffer. Until this is done, the read() below can only
+ take in single characters. This is to ensure that
+ unprocessed data doesn't end up sitting in the input fifo. */
+ scb->bufcnt = read (scb->fd, scb->buf,
+ (SERIAL_IS_ASYNC_P (scb) ? 1 : BUFSIZ));
+ if (scb->bufcnt != -1 || errno != EINTR)
+ break;
+ }
+
+ if (scb->bufcnt <= 0)
+ {
+ if (scb->bufcnt == 0)
+ return SERIAL_TIMEOUT; /* 0 chars means timeout [may need to
+ distinguish between EOF & timeouts
+ someday] */
+ else
+ return SERIAL_ERROR; /* Got an error from read */
+ }
+
+ scb->bufcnt--;
+ scb->bufp = scb->buf;
+ return *scb->bufp++;
+}
+
+int
+ser_unix_nop_noflush_set_tty_state (serial_t scb,
+ serial_ttystate new_ttystate,
+ serial_ttystate old_ttystate)
+{
+ return 0;
+}
+
+void
+ser_unix_nop_print_tty_state (serial_t scb,
+ serial_ttystate ttystate,
+ struct gdb_file *stream)
+{
+ /* Nothing to print. */
+ return;
+}
+
+int
+ser_unix_nop_setbaudrate (serial_t scb, int rate)
+{
+ return 0; /* Never fails! */
+}
+
+int
+ser_unix_nop_setstopbits (serial_t scb, int num)
+{
+ return 0; /* Never fails! */
+}
+
+int
+ser_unix_write (serial_t scb, const char *str, int len)
+{
+ int cc;
+
+ while (len > 0)
+ {
+ cc = write (scb->fd, str, len);
+
+ if (cc < 0)
+ return 1;
+ len -= cc;
+ str += cc;
+ }
+ return 0;
+}
+
+int
+ser_unix_nop_flush_output (serial_t scb)
+{
+ return 0;
+}
+
+int
+ser_unix_nop_flush_input (serial_t scb)
+{
+ return 0;
+}
+
+int
+ser_unix_nop_send_break (serial_t scb)
+{
+ return 0;
+}
+
+int
+ser_unix_nop_drain_output (serial_t scb)
+{
+ return 0;
+}
+
+static void
+ser_unix_event (int error, int fd, gdb_client_data context)
+{
+ serial_t scb = context;
+ scb->async_handler (error, scb->async_context, fd);
+}
+
+void
+ser_unix_async (serial_t scb,
+ int async_p)
+{
+ if (async_p)
+ {
+ add_file_handler (scb->fd, ser_unix_event, scb);
+ }
+ else
+ {
+ delete_file_handler (scb->fd);
+ }
+}
void
-_initialize_ser_hardwire ()
+_initialize_ser_hardwire (void)
{
- serial_add_interface (&hardwire_ops);
+ struct serial_ops *ops = XMALLOC (struct serial_ops);
+ memset (ops, sizeof (struct serial_ops), 0);
+ ops->name = "hardwire";
+ ops->next = 0;
+ ops->open = hardwire_open;
+ ops->close = hardwire_close;
+ /* FIXME: Don't replace this with the equivalent ser_unix*() until
+ the old TERMIOS/SGTTY/... timer code has been flushed. cagney
+ 1999-09-16. */
+ ops->readchar = hardwire_readchar;
+ /* FIXME: Don't replace this with the equivalent ser_unix*() until
+ the old TERMIOS/SGTTY/... timer code has been flushed. cagney
+ 1999-09-16. */
+ ops->write = hardwire_write;
+ ops->flush_output = hardwire_flush_output;
+ ops->flush_input = hardwire_flush_input;
+ ops->send_break = hardwire_send_break;
+ ops->go_raw = hardwire_raw;
+ ops->get_tty_state = hardwire_get_tty_state;
+ ops->set_tty_state = hardwire_set_tty_state;
+ ops->print_tty_state = hardwire_print_tty_state;
+ ops->noflush_set_tty_state = hardwire_noflush_set_tty_state;
+ ops->setbaudrate = hardwire_setbaudrate;
+ ops->setstopbits = hardwire_setstopbits;
+ ops->drain_output = hardwire_drain_output;
+ ops->async = ser_unix_async;
+ serial_add_interface (ops);
}
projects / deliverable / binutils-gdb.git / blobdiff