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-rw-r--r--gdb/inflow.c122
1 files changed, 81 insertions, 41 deletions
diff --git a/gdb/inflow.c b/gdb/inflow.c
index 698cfb4..0a66a4c 100644
--- a/gdb/inflow.c
+++ b/gdb/inflow.c
@@ -38,6 +38,8 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <sys/dir.h>
#include <signal.h>
+extern char *strerror(); /* strings corresponding to errno */
+
extern struct target_ops child_ops;
/* Nonzero if we are debugging an attached outside process
@@ -48,6 +50,9 @@ int attach_flag;
/* Record terminal status separately for debugger and inferior. */
+/* Does GDB have a terminal (on stdin)? */
+int gdb_has_a_terminal;
+
static TERMINAL sg_inferior;
static TERMINAL sg_ours;
@@ -82,15 +87,25 @@ static void (*sigint_ours) ();
static void (*sigquit_ours) ();
#endif /* TIOCGPGRP */
-/* Copy of inferior_io_terminal when inferior was last started. */
-static char *inferior_thisrun_terminal;
+/* The name of the tty (from the `tty' command) that we gave to the inferior
+ when it was last started. */
-static void terminal_ours_1 ();
+static char *inferior_thisrun_terminal;
/* Nonzero if our terminal settings are in effect.
Zero if the inferior's settings are in effect. */
+
static int terminal_is_ours;
+/* Macro for printing errors from ioctl operations */
+
+#define OOPSY(what) \
+ if (result == -1) \
+ fprintf(stderr, "[%s failed in terminal_inferior: %s]\n", \
+ what, strerror (errno))
+
+static void terminal_ours_1 ();
+
/* Initialize the terminal settings we record for the inferior,
before we actually run the inferior. */
@@ -125,24 +140,32 @@ terminal_init_inferior ()
void
terminal_inferior ()
{
- if (terminal_is_ours && inferior_thisrun_terminal == 0)
+ int result;
+
+ if (gdb_has_a_terminal && terminal_is_ours && inferior_thisrun_terminal == 0)
{
- fcntl (0, F_SETFL, tflags_inferior);
- fcntl (0, F_SETFL, tflags_inferior);
- ioctl (0, TIOCSETN, &sg_inferior);
+ result = fcntl (0, F_SETFL, tflags_inferior);
+ result = fcntl (0, F_SETFL, tflags_inferior);
+ OOPSY ("fcntl F_SETFL");
+ result = ioctl (0, TIOCSETN, &sg_inferior);
+ OOPSY ("ioctl TIOCSETN");
#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
- ioctl (0, TIOCSETC, &tc_inferior);
+ result = ioctl (0, TIOCSETC, &tc_inferior);
+ OOPSY ("ioctl TIOCSETC");
#endif
#if defined(TIOCGLTC) && !defined(TIOCGLTC_BROKEN)
- ioctl (0, TIOCSLTC, &ltc_inferior);
+ result = ioctl (0, TIOCSLTC, &ltc_inferior);
+ OOPSY ("ioctl TIOCSLTC");
#endif
#ifdef TIOCLGET
- ioctl (0, TIOCLSET, &lmode_inferior);
+ result = ioctl (0, TIOCLSET, &lmode_inferior);
+ OOPSY ("ioctl TIOCLSET");
#endif
#ifdef TIOCGPGRP
- ioctl (0, TIOCSPGRP, &pgrp_inferior);
+ result = ioctl (0, TIOCSPGRP, &pgrp_inferior);
+ OOPSY ("ioctl TIOCSPGRP");
#else
sigint_ours = (void (*) ()) signal (SIGINT, SIG_IGN);
sigquit_ours = (void (*) ()) signal (SIGQUIT, SIG_IGN);
@@ -179,17 +202,17 @@ static void
terminal_ours_1 (output_only)
int output_only;
{
+ int result;
#ifdef TIOCGPGRP
/* Ignore this signal since it will happen when we try to set the pgrp. */
void (*osigttou) ();
#endif /* TIOCGPGRP */
- /* The check for inferior_thisrun_terminal had been commented out
- when the call to ioctl (TIOCNOTTY) was commented out.
- Checking inferior_thisrun_terminal is necessary so that
+ /* Checking inferior_thisrun_terminal is necessary so that
if GDB is running in the background, it won't block trying
- to do the ioctl()'s below. */
- if (inferior_thisrun_terminal != 0)
+ to do the ioctl()'s below. Checking gdb_has_a_terminal
+ avoids attempting all the ioctl's when running in batch. */
+ if (inferior_thisrun_terminal != 0 || gdb_has_a_terminal == 0)
return;
if (!terminal_is_ours)
@@ -199,8 +222,8 @@ terminal_ours_1 (output_only)
#ifdef TIOCGPGRP
osigttou = (void (*) ()) signal (SIGTTOU, SIG_IGN);
- ioctl (0, TIOCGPGRP, &pgrp_inferior);
- ioctl (0, TIOCSPGRP, &pgrp_ours);
+ result = ioctl (0, TIOCGPGRP, &pgrp_inferior);
+ result = ioctl (0, TIOCSPGRP, &pgrp_ours);
signal (SIGTTOU, osigttou);
#else
@@ -209,16 +232,16 @@ terminal_ours_1 (output_only)
#endif /* TIOCGPGRP */
tflags_inferior = fcntl (0, F_GETFL, 0);
- ioctl (0, TIOCGETP, &sg_inferior);
+ result = ioctl (0, TIOCGETP, &sg_inferior);
#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
- ioctl (0, TIOCGETC, &tc_inferior);
+ result = ioctl (0, TIOCGETC, &tc_inferior);
#endif
#if defined(TIOCGLTC) && !defined(TIOCGLTC_BROKEN)
- ioctl (0, TIOCGLTC, &ltc_inferior);
+ result = ioctl (0, TIOCGLTC, &ltc_inferior);
#endif
#ifdef TIOCLGET
- ioctl (0, TIOCLGET, &lmode_inferior);
+ result = ioctl (0, TIOCLGET, &lmode_inferior);
#endif
}
@@ -232,18 +255,18 @@ terminal_ours_1 (output_only)
sg_ours.sg_flags |= (RAW | CBREAK) & sg_inferior.sg_flags;
#endif /* not HAVE_TERMIO */
- fcntl (0, F_SETFL, tflags_ours);
- fcntl (0, F_SETFL, tflags_ours);
- ioctl (0, TIOCSETN, &sg_ours);
+ result = fcntl (0, F_SETFL, tflags_ours);
+ result = fcntl (0, F_SETFL, tflags_ours);
+ result = ioctl (0, TIOCSETN, &sg_ours);
#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
- ioctl (0, TIOCSETC, &tc_ours);
+ result = ioctl (0, TIOCSETC, &tc_ours);
#endif
#if defined(TIOCGLTC) && !defined(TIOCGLTC_BROKEN)
- ioctl (0, TIOCSLTC, &ltc_ours);
+ result = ioctl (0, TIOCSLTC, &ltc_ours);
#endif
#ifdef TIOCLGET
- ioctl (0, TIOCLSET, &lmode_ours);
+ result = ioctl (0, TIOCLSET, &lmode_ours);
#endif
#ifdef HAVE_TERMIO
@@ -270,12 +293,20 @@ child_terminal_info (args, from_tty)
{
register int i;
+ if (!gdb_has_a_terminal) {
+ printf_filtered ("This GDB does not control a terminal.\n");
+ return;
+ }
+
printf_filtered ("Inferior's terminal status (currently saved by GDB):\n");
+ printf_filtered ("owner pgrp = %d, fcntl flags = 0x%x.\n",
+ pgrp_inferior, tflags_inferior);
+
#ifdef HAVE_TERMIO
- printf_filtered ("fcntl flags = 0x%x, c_iflag = 0x%x, c_oflag = 0x%x,\n",
- tflags_inferior, sg_inferior.c_iflag, sg_inferior.c_oflag);
+ printf_filtered (c_iflag = 0x%x, c_oflag = 0x%x,\n",
+ sg_inferior.c_iflag, sg_inferior.c_oflag);
printf_filtered ("c_cflag = 0x%x, c_lflag = 0x%x, c_line = 0x%x.\n",
sg_inferior.c_cflag, sg_inferior.c_lflag, sg_inferior.c_line);
printf_filtered ("c_cc: ");
@@ -285,22 +316,21 @@ child_terminal_info (args, from_tty)
#else /* not HAVE_TERMIO */
- printf_filtered ("fcntl flags = 0x%x, sgttyb.sg_flags = 0x%x, owner pid = %d.\n",
- tflags_inferior, sg_inferior.sg_flags, pgrp_inferior);
+ printf_filtered ("sgttyb.sg_flags = 0x%x.\n", sg_inferior.sg_flags);
#endif /* not HAVE_TERMIO */
#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
printf_filtered ("tchars: ");
for (i = 0; i < (int)sizeof (struct tchars); i++)
- printf_filtered ("0x%x ", ((char *)&tc_inferior)[i]);
+ printf_filtered ("0x%x ", ((unsigned char *)&tc_inferior)[i]);
printf_filtered ("\n");
#endif
#if defined(TIOCGLTC) && !defined(TIOCGLTC_BROKEN)
printf_filtered ("ltchars: ");
for (i = 0; i < (int)sizeof (struct ltchars); i++)
- printf_filtered ("0x%x ", ((char *)&ltc_inferior)[i]);
+ printf_filtered ("0x%x ", ((unsigned char *)&ltc_inferior)[i]);
printf_filtered ("\n");
#endif
@@ -472,6 +502,8 @@ try_writing_regs_command (arg, from_tty)
void
_initialize_inflow ()
{
+ int result;
+
add_info ("terminal", term_info,
"Print inferior's saved terminal status.");
@@ -486,23 +518,31 @@ Report which ones can be written.");
inferior_pid = 0;
- ioctl (0, TIOCGETP, &sg_ours);
+ /* Get all the current tty settings (including whether we have a tty at
+ all!). */
+
tflags_ours = fcntl (0, F_GETFL, 0);
+ OOPSY ("fcntl F_GETFL"); /* Should always work */
+ result = ioctl (0, TIOCGETP, &sg_ours);
+ if (result == 0) {
+ gdb_has_a_terminal = 1;
+ /* Get the rest of the tty settings, then... */
#if defined(TIOCGETC) && !defined(TIOCGETC_BROKEN)
- ioctl (0, TIOCGETC, &tc_ours);
+ ioctl (0, TIOCGETC, &tc_ours);
#endif
#if defined(TIOCGLTC) && !defined(TIOCGLTC_BROKEN)
- ioctl (0, TIOCGLTC, &ltc_ours);
+ ioctl (0, TIOCGLTC, &ltc_ours);
#endif
#ifdef TIOCLGET
- ioctl (0, TIOCLGET, &lmode_ours);
+ ioctl (0, TIOCLGET, &lmode_ours);
#endif
-
#ifdef TIOCGPGRP
- ioctl (0, TIOCGPGRP, &pgrp_ours);
+ ioctl (0, TIOCGPGRP, &pgrp_ours);
#endif /* TIOCGPGRP */
+ } else {
+ gdb_has_a_terminal = 0;
+ }
terminal_is_ours = 1;
}
-
generated by cgit v1.1 at 2024-12-14 13:31:00 +0000