/* Serial interface for a pipe to a separate program
- Copyright 1999 Free Software Foundation, Inc.
+ Copyright 1999, 2000, 2001 Free Software Foundation, Inc.
Contributed by Cygnus Solutions.
#include "defs.h"
#include "serial.h"
+#include "ser-unix.h"
+
+#include "gdb_vfork.h"
+
#include <sys/types.h>
-#ifdef HAVE_SYS_WAIT_H
-#include <sys/wait.h>
-#endif
#include <sys/socket.h>
#include <sys/time.h>
#include <fcntl.h>
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-
-#include "signals.h"
#include "gdb_string.h"
-extern int (*ui_loop_hook) PARAMS ((int));
-
-static int pipe_open PARAMS ((serial_t scb, const char *name));
-static void pipe_raw PARAMS ((serial_t scb));
-static int wait_for PARAMS ((serial_t scb, int timeout));
-static int pipe_readchar PARAMS ((serial_t scb, int timeout));
-static int pipe_setbaudrate PARAMS ((serial_t scb, int rate));
-static int pipe_setstopbits PARAMS ((serial_t scb, int num));
-static int pipe_write PARAMS ((serial_t scb, const char *str, int len));
-/* FIXME: static void pipe_restore PARAMS ((serial_t scb)); */
-static void pipe_close PARAMS ((serial_t scb));
-static serial_ttystate pipe_get_tty_state PARAMS ((serial_t scb));
-static int pipe_set_tty_state PARAMS ((serial_t scb, serial_ttystate state));
-static int pipe_return_0 PARAMS ((serial_t));
-static int pipe_noflush_set_tty_state PARAMS ((serial_t, serial_ttystate,
- serial_ttystate));
-static void pipe_print_tty_state PARAMS ((serial_t, serial_ttystate));
-
-extern void _initialize_ser_pipe PARAMS ((void));
+#include <signal.h>
-#undef XMALLOC
-#define XMALLOC(T) ((T*) xmalloc (sizeof (T)))
+static int pipe_open (struct serial *scb, const char *name);
+static void pipe_close (struct serial *scb);
+extern void _initialize_ser_pipe (void);
struct pipe_state
{
/* Open up a raw pipe */
static int
-pipe_open (scb, name)
- serial_t scb;
- const char *name;
+pipe_open (struct serial *scb, const char *name)
{
-#if !defined(O_NONBLOCK) || !defined(F_GETFL) || !defined(F_SETFL) || !HAVE_SOCKETPAIR
+#if !HAVE_SOCKETPAIR
return -1;
#else
struct pipe_state *state;
if (socketpair (AF_UNIX, SOCK_STREAM, 0, pdes) < 0)
return -1;
+ /* Create the child process to run the command in. Note that the
+ apparent call to vfork() below *might* actually be a call to
+ fork() due to the fact that autoconf will ``#define vfork fork''
+ on certain platforms. */
pid = vfork ();
/* Error. */
for (old = pidlist; old; old = old->next)
close (fileno (old->fp)); /* don't allow a flush */
#endif
- execl ("/bin/sh", "sh", "-c", name + 1, NULL);
+ execl ("/bin/sh", "sh", "-c", name, NULL);
_exit (127);
}
scb->fd = pdes[0];
scb->state = state;
- /* Make it non-blocking */
- {
- int flags = fcntl (scb->fd, F_GETFL, 0);
- if (fcntl (scb->fd, F_SETFL, flags | O_NONBLOCK) < 0)
- {
- perror ("ser-pipe");
- pipe_close (scb);
- return -1;
- }
- }
-
/* If we don't do this, GDB simply exits when the remote side dies. */
signal (SIGPIPE, SIG_IGN);
return 0;
#endif
}
-static serial_ttystate
-pipe_get_tty_state (scb)
- serial_t scb;
-{
- /* return garbage */
- return xmalloc (sizeof (int));
-}
-
-static int
-pipe_set_tty_state (scb, ttystate)
- serial_t scb;
- serial_ttystate ttystate;
-{
- return 0;
-}
-
-static int
-pipe_return_0 (scb)
- serial_t scb;
-{
- return 0;
-}
-
static void
-pipe_raw (scb)
- 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.
-
- For termio{s}, we actually just setup VTIME if necessary, and let the
- timeout occur in the read() in pipe_read().
- */
-
-static int
-wait_for (scb, timeout)
- 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). */
-
-static int
-pipe_readchar (scb, timeout)
- 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 = 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)
- {
- scb->bufcnt = read (scb->fd, scb->buf, 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++;
-}
-
-static int
-pipe_noflush_set_tty_state (scb, new_ttystate, old_ttystate)
- serial_t scb;
- serial_ttystate new_ttystate;
- serial_ttystate old_ttystate;
-{
- return 0;
-}
-
-static void
-pipe_print_tty_state (scb, ttystate)
- serial_t scb;
- serial_ttystate ttystate;
-{
- /* Nothing to print. */
- return;
-}
-
-static int
-pipe_setbaudrate (scb, rate)
- serial_t scb;
- int rate;
-{
- return 0; /* Never fails! */
-}
-
-static int
-pipe_setstopbits (scb, num)
- serial_t scb;
- int num;
-{
- return 0; /* Never fails! */
-}
-
-static int
-pipe_write (scb, str, len)
- 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;
-}
-
-static void
-pipe_close (scb)
- serial_t scb;
+pipe_close (struct serial *scb)
{
struct pipe_state *state = scb->state;
if (state != NULL)
int pid = state->pid;
close (scb->fd);
scb->fd = -1;
- free (state);
+ xfree (state);
scb->state = NULL;
kill (pid, SIGTERM);
/* Might be useful to check that the child does die. */
}
}
-static struct serial_ops pipe_ops =
-{
- "pipe",
- 0,
- pipe_open,
- pipe_close,
- pipe_readchar,
- pipe_write,
- pipe_return_0, /* flush output */
- pipe_return_0, /* flush input */
- pipe_return_0, /* send break */
- pipe_raw,
- pipe_get_tty_state,
- pipe_set_tty_state,
- pipe_print_tty_state,
- pipe_noflush_set_tty_state,
- pipe_setbaudrate,
- pipe_setstopbits,
- pipe_return_0, /* wait for output to drain */
-};
+static struct serial_ops pipe_ops;
void
-_initialize_ser_pipe ()
+_initialize_ser_pipe (void)
{
- serial_add_interface (&pipe_ops);
+ struct serial_ops *ops = XMALLOC (struct serial_ops);
+ memset (ops, sizeof (struct serial_ops), 0);
+ ops->name = "pipe";
+ ops->next = 0;
+ ops->open = pipe_open;
+ ops->close = pipe_close;
+ ops->readchar = ser_unix_readchar;
+ ops->write = ser_unix_write;
+ ops->flush_output = ser_unix_nop_flush_output;
+ ops->flush_input = ser_unix_flush_input;
+ ops->send_break = ser_unix_nop_send_break;
+ ops->go_raw = ser_unix_nop_raw;
+ ops->get_tty_state = ser_unix_nop_get_tty_state;
+ ops->set_tty_state = ser_unix_nop_set_tty_state;
+ ops->print_tty_state = ser_unix_nop_print_tty_state;
+ ops->noflush_set_tty_state = ser_unix_nop_noflush_set_tty_state;
+ ops->setbaudrate = ser_unix_nop_setbaudrate;
+ ops->setstopbits = ser_unix_nop_setstopbits;
+ ops->drain_output = ser_unix_nop_drain_output;
+ ops->async = ser_unix_async;
+ serial_add_interface (ops);
}
projects / deliverable / binutils-gdb.git / blobdiff