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+ BASH PATCH REPORT
+ =================
+
+Bash-Release: 4.3
+Patch-ID: bash43-033
+
+Bug-Reported-by: mickael9@gmail.com, Jan Rome <jan.rome@gmail.com>
+Bug-Reference-ID: <20140907224046.382ED3610CC@mickael-laptop.localdomain>,
+ <540D661D.50908@gmail.com>
+Bug-Reference-URL: http://lists.gnu.org/archive/html/bug-bash/2014-09/msg00029.html
+ http://lists.gnu.org/archive/html/bug-bash/2014-09/msg00030.html
+
+Bug-Description:
+
+Bash does not clean up the terminal state in all cases where bash or
+readline modifies it and bash is subsequently terminated by a fatal signal.
+This happens when the `read' builtin modifies the terminal settings, both
+when readline is active and when it is not. It occurs most often when a script
+installs a trap that exits on a signal without re-sending the signal to itself.
+
+Patch (apply with `patch -p0'):
+
+*** ../bash-4.3-patched/shell.c 2014-01-14 08:04:32.000000000 -0500
+--- shell.c 2014-12-22 10:27:50.000000000 -0500
+***************
+*** 74,77 ****
+--- 74,78 ----
+
+ #if defined (READLINE)
++ # include <readline/readline.h>
+ # include "bashline.h"
+ #endif
+***************
+*** 910,913 ****
+--- 912,923 ----
+ fflush (stderr);
+
++ /* Clean up the terminal if we are in a state where it's been modified. */
++ #if defined (READLINE)
++ if (RL_ISSTATE (RL_STATE_TERMPREPPED) && rl_deprep_term_function)
++ (*rl_deprep_term_function) ();
++ #endif
++ if (read_tty_modified ())
++ read_tty_cleanup ();
++
+ /* Do trap[0] if defined. Allow it to override the exit status
+ passed to us. */
+*** ../bash-4.3-patched/builtins/read.def 2014-10-01 12:57:38.000000000 -0400
+--- builtins/read.def 2014-12-22 10:48:54.000000000 -0500
+***************
+*** 141,148 ****
+ int sigalrm_seen;
+
+! static int reading;
+ static SigHandler *old_alrm;
+ static unsigned char delim;
+
+ /* In all cases, SIGALRM just sets a flag that we check periodically. This
+ avoids problems with the semi-tricky stuff we do with the xfree of
+--- 141,150 ----
+ int sigalrm_seen;
+
+! static int reading, tty_modified;
+ static SigHandler *old_alrm;
+ static unsigned char delim;
+
++ static struct ttsave termsave;
++
+ /* In all cases, SIGALRM just sets a flag that we check periodically. This
+ avoids problems with the semi-tricky stuff we do with the xfree of
+***************
+*** 189,193 ****
+ SHELL_VAR *var;
+ TTYSTRUCT ttattrs, ttset;
+- struct ttsave termsave;
+ #if defined (ARRAY_VARS)
+ WORD_LIST *alist;
+--- 191,194 ----
+***************
+*** 222,226 ****
+ USE_VAR(lastsig);
+
+! sigalrm_seen = reading = 0;
+
+ i = 0; /* Index into the string that we are reading. */
+--- 223,227 ----
+ USE_VAR(lastsig);
+
+! sigalrm_seen = reading = tty_modified = 0;
+
+ i = 0; /* Index into the string that we are reading. */
+***************
+*** 439,442 ****
+--- 440,445 ----
+ goto assign_vars;
+ }
++ if (interactive_shell == 0)
++ initialize_terminating_signals ();
+ old_alrm = set_signal_handler (SIGALRM, sigalrm);
+ add_unwind_protect (reset_alarm, (char *)NULL);
+***************
+*** 483,487 ****
+--- 486,493 ----
+ if (i < 0)
+ sh_ttyerror (1);
++ tty_modified = 1;
+ add_unwind_protect ((Function *)ttyrestore, (char *)&termsave);
++ if (interactive_shell == 0)
++ initialize_terminating_signals ();
+ }
+ }
+***************
+*** 498,502 ****
+--- 504,511 ----
+ sh_ttyerror (1);
+
++ tty_modified = 1;
+ add_unwind_protect ((Function *)ttyrestore, (char *)&termsave);
++ if (interactive_shell == 0)
++ initialize_terminating_signals ();
+ }
+
+***************
+*** 589,592 ****
+--- 598,603 ----
+ else
+ lastsig = 0;
++ if (terminating_signal && tty_modified)
++ ttyrestore (&termsave); /* fix terminal before exiting */
+ CHECK_TERMSIG;
+ eof = 1;
+***************
+*** 979,982 ****
+--- 990,1007 ----
+ {
+ ttsetattr (ttp->fd, ttp->attrs);
++ tty_modified = 0;
++ }
++
++ void
++ read_tty_cleanup ()
++ {
++ if (tty_modified)
++ ttyrestore (&termsave);
++ }
++
++ int
++ read_tty_modified ()
++ {
++ return (tty_modified);
+ }
+
+*** ../bash-4.3-patched/builtins/common.h 2014-10-01 12:57:47.000000000 -0400
+--- builtins/common.h 2014-12-22 10:10:14.000000000 -0500
+***************
+*** 123,126 ****
+--- 141,148 ----
+ extern void getopts_reset __P((int));
+
++ /* Functions from read.def */
++ extern void read_tty_cleanup __P((void));
++ extern int read_tty_modified __P((void));
++
+ /* Functions from set.def */
+ extern int minus_o_option_value __P((char *));
+*** ../bash-4.3-patched/bashline.c 2014-05-14 09:22:39.000000000 -0400
+--- bashline.c 2014-09-08 11:28:56.000000000 -0400
+***************
+*** 203,206 ****
+--- 203,207 ----
+ extern int array_needs_making;
+ extern int posixly_correct, no_symbolic_links;
++ extern int sigalrm_seen;
+ extern char *current_prompt_string, *ps1_prompt;
+ extern STRING_INT_ALIST word_token_alist[];
+***************
+*** 4209,4214 ****
+ /* If we're going to longjmp to top_level, make sure we clean up readline.
+ check_signals will call QUIT, which will eventually longjmp to top_level,
+! calling run_interrupt_trap along the way. */
+! if (interrupt_state)
+ rl_cleanup_after_signal ();
+ bashline_reset_event_hook ();
+--- 4262,4268 ----
+ /* If we're going to longjmp to top_level, make sure we clean up readline.
+ check_signals will call QUIT, which will eventually longjmp to top_level,
+! calling run_interrupt_trap along the way. The check for sigalrm_seen is
+! to clean up the read builtin's state. */
+! if (terminating_signal || interrupt_state || sigalrm_seen)
+ rl_cleanup_after_signal ();
+ bashline_reset_event_hook ();
+*** ../bash-4.3-patched/sig.c 2014-01-10 15:06:06.000000000 -0500
+--- sig.c 2014-09-08 11:26:33.000000000 -0400
+***************
+*** 533,538 ****
+ /* Set the event hook so readline will call it after the signal handlers
+ finish executing, so if this interrupted character input we can get
+! quick response. */
+! if (interactive_shell && interactive && no_line_editing == 0)
+ bashline_set_event_hook ();
+ #endif
+--- 533,540 ----
+ /* Set the event hook so readline will call it after the signal handlers
+ finish executing, so if this interrupted character input we can get
+! quick response. If readline is active or has modified the terminal we
+! need to set this no matter what the signal is, though the check for
+! RL_STATE_TERMPREPPED is possibly redundant. */
+! if (RL_ISSTATE (RL_STATE_SIGHANDLER) || RL_ISSTATE (RL_STATE_TERMPREPPED))
+ bashline_set_event_hook ();
+ #endif
+*** ../bash-4.3/patchlevel.h 2012-12-29 10:47:57.000000000 -0500
+--- patchlevel.h 2014-03-20 20:01:28.000000000 -0400
+***************
+*** 26,30 ****
+ looks for to find the patch level (for the sccs version string). */
+
+! #define PATCHLEVEL 32
+
+ #endif /* _PATCHLEVEL_H_ */
+--- 26,30 ----
+ looks for to find the patch level (for the sccs version string). */
+
+! #define PATCHLEVEL 33
+
+ #endif /* _PATCHLEVEL_H_ */