diff options
Diffstat (limited to 'shell')
| -rw-r--r-- | shell/hush.c | 123 |
1 files changed, 57 insertions, 66 deletions
diff --git a/shell/hush.c b/shell/hush.c index 00d86b4..3ad6a97 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -7599,9 +7599,8 @@ static NOINLINE void pseudo_exec_argv(nommu_save_t *nommu_save, { const struct built_in_command *x; char **new_env; -#if ENABLE_HUSH_COMMAND - char opt_vV = 0; -#endif + IF_HUSH_COMMAND(char opt_vV = 0;) + IF_HUSH_FUNCTIONS(const struct function *funcp;) new_env = expand_assignments(argv, assignment_cnt); dump_cmd_in_x_mode(new_env); @@ -7640,12 +7639,9 @@ static NOINLINE void pseudo_exec_argv(nommu_save_t *nommu_save, #if ENABLE_HUSH_FUNCTIONS /* Check if the command matches any functions (this goes before bltins) */ - { - const struct function *funcp = find_function(argv[0]); - if (funcp) { - exec_function(&nommu_save->argv_from_re_execing, funcp, argv); - } - } + funcp = find_function(argv[0]); + if (funcp) + exec_function(&nommu_save->argv_from_re_execing, funcp, argv); #endif #if ENABLE_HUSH_COMMAND @@ -8366,22 +8362,18 @@ static NOINLINE int run_pipe(struct pipe *pi) if (!funcp) x = find_builtin(argv_expanded[0]); if (x || funcp) { - if (!funcp) { - if (x->b_function == builtin_exec && argv_expanded[1] == NULL) { - debug_printf("exec with redirects only\n"); - rcode = setup_redirects(command, NULL); - /* rcode=1 can be if redir file can't be opened */ - goto clean_up_and_ret1; - } + if (x && x->b_function == builtin_exec && argv_expanded[1] == NULL) { + debug_printf("exec with redirects only\n"); + rcode = setup_redirects(command, NULL); + /* rcode=1 can be if redir file can't be opened */ + goto clean_up_and_ret1; } - /* Without bumping var nesting level, this leaks - * exported $a: + /* Bump var nesting, or this will leak exported $a: * a=b true; env | grep ^a= */ enter_var_nest_level(); rcode = redirect_and_varexp_helper(&old_vars, command, &squirrel, argv_expanded); - if (rcode == 0) { if (!funcp) { debug_printf_exec(": builtin '%s' '%s'...\n", @@ -8406,58 +8398,57 @@ static NOINLINE int run_pipe(struct pipe *pi) } #endif } - clean_up_and_ret: - leave_var_nest_level(); - add_vars(old_vars); - restore_redirects(squirrel); - /* - * Try "usleep 99999999" + ^C + "echo $?" - * with FEATURE_SH_NOFORK=y. - */ - if (!funcp) { - /* It was builtin or nofork. - * if this would be a real fork/execed program, - * it should have died if a fatal sig was received. - * But OTOH, there was no separate process, - * the sig was sent to _shell_, not to non-existing - * child. - * Let's just handle ^C only, this one is obvious: - * we aren't ok with exitcode 0 when ^C was pressed - * during builtin/nofork. + } else + if (ENABLE_FEATURE_SH_NOFORK && NUM_APPLETS > 1) { + int n = find_applet_by_name(argv_expanded[0]); + if (n < 0 || !APPLET_IS_NOFORK(n)) + goto must_fork; + + enter_var_nest_level(); + rcode = redirect_and_varexp_helper(&old_vars, command, &squirrel, argv_expanded); + if (rcode == 0) { + debug_printf_exec(": run_nofork_applet '%s' '%s'...\n", + argv_expanded[0], argv_expanded[1]); + /* + * Note: signals (^C) can't interrupt here. + * We remember them and they will be acted upon + * after applet returns. + * This makes applets which can run for a long time + * and/or wait for user input ineligible for NOFORK: + * for example, "yes" or "rm" (rm -i waits for input). */ - if (sigismember(&G.pending_set, SIGINT)) - rcode = 128 + SIGINT; + rcode = run_nofork_applet(n, argv_expanded); } - clean_up_and_ret1: - free(argv_expanded); - IF_HAS_KEYWORDS(if (pi->pi_inverted) rcode = !rcode;) - debug_leave(); - debug_printf_exec("run_pipe return %d\n", rcode); - return rcode; } - if (ENABLE_FEATURE_SH_NOFORK && NUM_APPLETS > 1) { - int n = find_applet_by_name(argv_expanded[0]); - if (n >= 0 && APPLET_IS_NOFORK(n)) { - enter_var_nest_level(); - rcode = redirect_and_varexp_helper(&old_vars, command, &squirrel, argv_expanded); - if (rcode == 0) { - debug_printf_exec(": run_nofork_applet '%s' '%s'...\n", - argv_expanded[0], argv_expanded[1]); - /* - * Note: signals (^C) can't interrupt here. - * We remember them and they will be acted upon - * after applet returns. - * This makes applets which can run for a long time - * and/or wait for user input ineligible for NOFORK: - * for example, "yes" or "rm" (rm -i waits for input). - */ - rcode = run_nofork_applet(n, argv_expanded); - } - goto clean_up_and_ret; - } + leave_var_nest_level(); + add_vars(old_vars); + restore_redirects(squirrel); + + /* + * Try "usleep 99999999" + ^C + "echo $?" + * with FEATURE_SH_NOFORK=y. + */ + if (!funcp) { + /* It was builtin or nofork. + * if this would be a real fork/execed program, + * it should have died if a fatal sig was received. + * But OTOH, there was no separate process, + * the sig was sent to _shell_, not to non-existing + * child. + * Let's just handle ^C only, this one is obvious: + * we aren't ok with exitcode 0 when ^C was pressed + * during builtin/nofork. + */ + if (sigismember(&G.pending_set, SIGINT)) + rcode = 128 + SIGINT; } - /* It is neither builtin nor applet. We must fork. */ + clean_up_and_ret1: + free(argv_expanded); + IF_HAS_KEYWORDS(if (pi->pi_inverted) rcode = !rcode;) + debug_leave(); + debug_printf_exec("run_pipe return %d\n", rcode); + return rcode; } must_fork: |