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6bf7aab6 | 1 | @c This is part of the Emacs manual. |
62eda0e2 | 2 | @c Copyright (C) 1985, 1986, 1987, 1993, 1994, 1995, 2001, 2002, 2003, |
3f548a7c | 3 | @c 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
6bf7aab6 | 4 | @c See file emacs.texi for copying conditions. |
321ca37f | 5 | @iftex |
6bf7aab6 | 6 | @chapter Entering and Exiting Emacs |
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7 | |
8 | This chapter explains how to enter Emacs, and how to exit it. | |
9 | @end iftex | |
10 | ||
11 | @ifnottex | |
12 | @raisesections | |
13 | @end ifnottex | |
14 | ||
15 | @node Entering Emacs, Exiting, Commands, Top | |
16 | @section Entering Emacs | |
6bf7aab6 | 17 | @cindex entering Emacs |
177c0ea7 | 18 | @cindex starting Emacs |
6bf7aab6 | 19 | |
708bf232 | 20 | The usual way to invoke Emacs is with the shell command |
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21 | @command{emacs}. From a terminal window running in the X Window |
22 | System, you can also run Emacs in the background with | |
23 | @command{emacs&}; this way, Emacs won't tie up the terminal window, so | |
24 | you can use it to run other shell commands. | |
25 | ||
26 | @cindex startup screen | |
27 | When Emacs starts up, the initial frame displays a special buffer | |
28 | named @samp{*GNU Emacs*}. This buffer contains @dfn{links} to common | |
29 | tasks that might be useful to beginning users. For instance, | |
30 | activating the @samp{Emacs Tutorial} link opens the Emacs tutorial; | |
31 | this does the same thing as the command @kbd{C-h t} | |
32 | (@code{help-with-tutorial}). To activate a link, either move point | |
33 | onto it and type @kbd{@key{RET}}, or click on it with @kbd{mouse-1} | |
34 | (the left mouse button). | |
35 | ||
36 | Using a command line argument, you can tell Emacs to visit one or | |
37 | more specific files as soon as it starts up. For example, | |
38 | @command{emacs foo.txt} starts Emacs with a buffer displaying the | |
39 | contents of the file @samp{foo.txt}. This feature exists mainly for | |
40 | compatibility with other editors, which are designed to edit one file | |
41 | at a time: once you are done with that file, you exit the editor, and | |
42 | start it again the next time you need it. | |
43 | ||
44 | Using Emacs in this way---starting it afresh each time you want to | |
45 | edit a file---is unnecessary and wasteful. Emacs can visit more than | |
46 | one file in a single editing session, and exiting the Emacs session | |
47 | loses valuable accumulated context, such as the kill ring, registers, | |
48 | undo history, and mark ring. These features, described later in the | |
49 | manual, are useful for performing edits across multiple files, or | |
50 | continuing edits to a single file. | |
51 | ||
52 | The recommended way to use Emacs is to start it only once, just | |
6bf7aab6 | 53 | after you log in, and do all your editing in the same Emacs session. |
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54 | Each time you edit a file, visit it with the existing Emacs, which |
55 | eventually has many files in it ready for editing. @xref{Files}, for | |
56 | more information on visiting more than one file. | |
6bf7aab6 | 57 | |
c9a769c8 RS |
58 | To edit a file from another program while Emacs is running, you can |
59 | use the @command{emacsclient} helper program to open a file in the | |
60 | already running Emacs. @xref{Emacs Server}. | |
9f1cc7eb | 61 | |
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62 | Emacs accepts other command line arguments that tell it to load |
63 | certain Lisp files, call certain functions, and so forth. These | |
64 | features exist mainly for advanced users. @xref{Emacs Invocation}. | |
6cca5de0 | 65 | |
6bf7aab6 DL |
66 | @node Exiting, Basic, Entering Emacs, Top |
67 | @section Exiting Emacs | |
68 | @cindex exiting | |
69 | @cindex killing Emacs | |
6bf7aab6 DL |
70 | @cindex leaving Emacs |
71 | @cindex quitting Emacs | |
72 | ||
6bf7aab6 | 73 | @table @kbd |
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74 | @item C-x C-c |
75 | Kill Emacs (@code{save-buffers-kill-emacs}). | |
6bf7aab6 DL |
76 | @item C-z |
77 | Suspend Emacs (@code{suspend-emacs}) or iconify a frame | |
78 | (@code{iconify-or-deiconify-frame}). | |
6bf7aab6 DL |
79 | @end table |
80 | ||
6bf7aab6 DL |
81 | @kindex C-x C-c |
82 | @findex save-buffers-kill-emacs | |
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83 | @dfn{Killing} Emacs means terminating the Emacs program. To do |
84 | this, type @kbd{C-x C-c} (@code{save-buffers-kill-emacs}). A | |
85 | two-character key is used to make it harder to type by accident. If | |
86 | there are any modified file-visiting buffers when you type @kbd{C-x | |
87 | C-c}, Emacs first offers to save these buffers. If you do not save | |
88 | them all, it asks for confirmation again, since the unsaved changes | |
89 | will be lost. Emacs also asks for confirmation if any subprocesses | |
90 | are still running, since killing Emacs will also kill the subprocesses | |
91 | (@pxref{Shell}). | |
92 | ||
93 | Emacs can, optionally, record certain session information when you | |
94 | kill it, such as the files you were visiting at the time. This | |
95 | information is then available the next time you start Emacs. | |
96 | @xref{Saving Emacs Sessions}. | |
6bf7aab6 | 97 | |
e020c833 EZ |
98 | @vindex confirm-kill-emacs |
99 | If the value of the variable @code{confirm-kill-emacs} is | |
100 | non-@code{nil}, @kbd{C-x C-c} assumes that its value is a predicate | |
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101 | function, and calls that function. If the result of the function call |
102 | is non-@code{nil}, the session is killed, otherwise Emacs continues to | |
103 | run. One convenient function to use as the value of | |
104 | @code{confirm-kill-emacs} is the function @code{yes-or-no-p}. The | |
105 | default value of @code{confirm-kill-emacs} is @code{nil}. | |
106 | ||
107 | @cindex minimizing a frame | |
108 | @cindex iconifying | |
109 | @cindex suspending | |
110 | You can ``exit'' Emacs in two other ways. On a graphical display, | |
111 | you can @dfn{iconify} (or @dfn{minimize}) an Emacs frame; depending on | |
112 | the window system, this either replaces the Emacs frame with a tiny | |
113 | ``icon'' or conceals the frame entirely (@pxref{Frames}). On a | |
114 | text-only terminal, you can @dfn{suspend} Emacs; this means stopping | |
115 | the Emacs program temporarily, returning control to its parent process | |
116 | (usually a shell). | |
117 | ||
118 | @kindex C-z | |
119 | @findex iconify-or-deiconify-frame | |
120 | @findex suspend-emacs | |
121 | On a graphical display, @kbd{C-z} runs the command | |
122 | @code{iconify-or-deiconify-frame}, which iconifies the selected Emacs | |
123 | frame. On a text terminal, @kbd{C-z} runs the command | |
124 | @code{suspend-emacs}, which suspends Emacs. | |
125 | ||
126 | After iconifying or suspending Emacs, you can return to it and | |
127 | continue editing wherever you left off. The way to do this depends on | |
128 | the window system or shell. In most common shells, you can resume | |
129 | Emacs after suspending it with the shell command @command{%emacs}. | |
130 | ||
131 | @vindex cannot-suspend | |
132 | On very old systems that don't support suspending programs, | |
133 | @kbd{C-z} starts an inferior shell that communicates directly with the | |
134 | terminal, and Emacs waits until you exit the subshell. (The way to | |
135 | exit the subshell is usually @kbd{C-d} or @command{exit}.) On these | |
136 | systems, you can only get back to the shell from which Emacs was run | |
137 | (to log out, for example) when you kill Emacs. Suspending can also | |
138 | fail if you run Emacs under a shell that doesn't support suspending | |
139 | jobs, even if the system itself does support it. In this case, you | |
140 | can set the variable @code{cannot-suspend} to a non-@code{nil} value | |
141 | to force @kbd{C-z} to start an inferior shell. | |
142 | ||
143 | Text-only terminals usually listen for certain special characters | |
6bf7aab6 | 144 | whose meaning is to kill or suspend the program you are running. |
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145 | @b{This terminal feature is turned off while you are in Emacs.} The |
146 | meanings of @kbd{C-z} and @kbd{C-x C-c} as keys in Emacs were inspired | |
147 | by the use of @kbd{C-z} and @kbd{C-c} on several operating systems as | |
148 | the characters for stopping or killing a program, but that is their | |
149 | only relationship with the operating system. You can customize these | |
150 | keys to run any commands of your choice (@pxref{Keymaps}). | |
ab5796a9 | 151 | |
6cca5de0 LT |
152 | @ifnottex |
153 | @lowersections | |
154 | @end ifnottex | |
155 | ||
ab5796a9 MB |
156 | @ignore |
157 | arch-tag: df798d8b-f253-4113-b585-f528f078a944 | |
158 | @end ignore |