1This file is exit.def, from which is created exit.c. 2It implements the builtins "exit", and "logout" in Bash. 3 4Copyright (C) 1987-2009 Free Software Foundation, Inc. 5 6This file is part of GNU Bash, the Bourne Again SHell. 7 8Bash is free software: you can redistribute it and/or modify 9it under the terms of the GNU General Public License as published by 10the Free Software Foundation, either version 3 of the License, or 11(at your option) any later version. 12 13Bash is distributed in the hope that it will be useful, 14but WITHOUT ANY WARRANTY; without even the implied warranty of 15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16GNU General Public License for more details. 17 18You should have received a copy of the GNU General Public License 19along with Bash. If not, see <http://www.gnu.org/licenses/>. 20 21$PRODUCES exit.c 22 23$BUILTIN exit 24$FUNCTION exit_builtin 25$SHORT_DOC exit [n] 26Exit the shell. 27 28Exits the shell with a status of N. If N is omitted, the exit status 29is that of the last command executed. 30$END 31 32#include <config.h> 33 34#include "../bashtypes.h" 35#include <stdio.h> 36 37#if defined (HAVE_UNISTD_H) 38# include <unistd.h> 39#endif 40 41#include "../bashintl.h" 42 43#include "../shell.h" 44#include "../jobs.h" 45 46#include "common.h" 47#include "builtext.h" /* for jobs_builtin */ 48 49extern int check_jobs_at_exit; 50extern int last_command_exit_value; 51extern int running_trap, trap_saved_exit_value; 52extern int subshell_environment; 53extern sh_builtin_func_t *this_shell_builtin; 54extern sh_builtin_func_t *last_shell_builtin; 55 56static int exit_or_logout __P((WORD_LIST *)); 57static int sourced_logout; 58 59int 60exit_builtin (list) 61 WORD_LIST *list; 62{ 63 if (interactive) 64 { 65 fprintf (stderr, login_shell ? _("logout\n") : "exit\n"); 66 fflush (stderr); 67 } 68 69 return (exit_or_logout (list)); 70} 71 72$BUILTIN logout 73$FUNCTION logout_builtin 74$SHORT_DOC logout [n] 75Exit a login shell. 76 77Exits a login shell with exit status N. Returns an error if not executed 78in a login shell. 79$END 80 81/* How to logout. */ 82int 83logout_builtin (list) 84 WORD_LIST *list; 85{ 86 if (login_shell == 0 /* && interactive */) 87 { 88 builtin_error (_("not login shell: use `exit'")); 89 return (EXECUTION_FAILURE); 90 } 91 else 92 return (exit_or_logout (list)); 93} 94 95static int 96exit_or_logout (list) 97 WORD_LIST *list; 98{ 99 int exit_value; 100 101#if defined (JOB_CONTROL) 102 int exit_immediate_okay, stopmsg; 103 104 exit_immediate_okay = (interactive == 0 || 105 last_shell_builtin == exit_builtin || 106 last_shell_builtin == logout_builtin || 107 last_shell_builtin == jobs_builtin); 108 109 /* Check for stopped jobs if the user wants to. */ 110 if (exit_immediate_okay == 0) 111 { 112 register int i; 113 for (i = stopmsg = 0; i < js.j_jobslots; i++) 114 if (jobs[i] && STOPPED (i)) 115 stopmsg = JSTOPPED; 116 else if (check_jobs_at_exit && stopmsg == 0 && jobs[i] && RUNNING (i)) 117 stopmsg = JRUNNING; 118 119 if (stopmsg == JSTOPPED) 120 fprintf (stderr, _("There are stopped jobs.\n")); 121 else if (stopmsg == JRUNNING) 122 fprintf (stderr, _("There are running jobs.\n")); 123 124 if (stopmsg && check_jobs_at_exit) 125 list_all_jobs (JLIST_STANDARD); 126 127 if (stopmsg) 128 { 129 /* This is NOT superfluous because EOF can get here without 130 going through the command parser. Set both last and this 131 so that either `exit', `logout', or ^D will work to exit 132 immediately if nothing intervenes. */ 133 this_shell_builtin = last_shell_builtin = exit_builtin; 134 return (EXECUTION_FAILURE); 135 } 136 } 137#endif /* JOB_CONTROL */ 138 139 /* Get return value if present. This means that you can type 140 `logout 5' to a shell, and it returns 5. */ 141 142 /* If we're running the exit trap (running_trap == 1, since running_trap 143 gets set to SIG+1), and we don't have a argument given to `exit' 144 (list == 0), use the exit status we saved before running the trap 145 commands (trap_saved_exit_value). */ 146 exit_value = (running_trap == 1 && list == 0) ? trap_saved_exit_value : get_exitstat (list); 147 148 bash_logout (); 149 150 last_command_exit_value = exit_value; 151 152 /* Exit the program. */ 153 jump_to_top_level (EXITPROG); 154 /*NOTREACHED*/ 155} 156 157void 158bash_logout () 159{ 160 /* Run our `~/.bash_logout' file if it exists, and this is a login shell. */ 161 if (login_shell && sourced_logout++ == 0 && subshell_environment == 0) 162 { 163 maybe_execute_file ("~/.bash_logout", 1); 164#ifdef SYS_BASH_LOGOUT 165 maybe_execute_file (SYS_BASH_LOGOUT, 1); 166#endif 167 } 168} 169