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fix two bugs with shells started to run executable scripts inheriting shell state; fix potential buffer overflow in brace expansion; fix crash caused by nofork command substitution not saving enough state

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This commit is contained in:
Chet Ramey
2024-01-23 16:38:15 -05:00
parent a4f44b7a11
commit 10702735a0
8 changed files with 93 additions and 30 deletions
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shell.c
+20 -19
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@@ -984,8 +984,11 @@ exit_shell (int s)
/* 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)
if (bash_readline_initialized && RL_ISSTATE (RL_STATE_TERMPREPPED) && rl_deprep_term_function)
{
itrace("exit_shell: calling rl_deprep_term_function");
(*rl_deprep_term_function) ();
}
#endif
if (read_tty_modified ())
read_tty_cleanup ();
@@ -1121,15 +1124,6 @@ execute_profile_file (void)
maybe_execute_file ("~/.profile", 1);
}
/* Return the name of the default interactive shell startup file. We just
return the name of the historical bash startup file, but we could look
at a BASHRC variable or some more elaborate scheme. */
static inline char *
find_bashrc_file (void)
{
return DEFAULT_BASHRC;
}
static void
execute_bashrc_file (void)
{
@@ -1144,12 +1138,7 @@ execute_bashrc_file (void)
if (bashrc_file)
maybe_execute_file (bashrc_file, 1);
else
{
char *fn;
if (fn = find_bashrc_file ())
maybe_execute_file (fn, 1); /* don't have to free this yet */
}
maybe_execute_file (DEFAULT_BASHRC, 1);
}
static void
@@ -2004,13 +1993,25 @@ shell_reinitialize (void)
no_rc = no_profile = 1;
/* Things that get 0. */
login_shell = make_login_shell = interactive = executing = 0;
debugging = do_version = line_number = last_command_exit_value = 0;
forced_interactive = interactive_shell = 0;
login_shell = make_login_shell = executing = 0;
debugging = debugging_mode = 0;
do_version = line_number = last_command_exit_value = 0;
forced_interactive = interactive_shell = interactive = 0;
subshell_environment = running_in_background = 0;
expand_aliases = expaliases_flag = 0;
bash_argv_initialized = 0;
/* 20240120 */
startup_state = reading_shell_script = 0;
/* XXX - inherit posixly_correct? */
/* The shell has never done this. Should it? */
#if 0
reset_shell_flags ();
reset_shell_options ();
reset_shopt_options ();
#endif
/* XXX - should we set jobs_m_flag to 0 here? */
#if defined (HISTORY)