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comparison toys/other/chvt.c @ 694:786841fdb1e0

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Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style. The actual code should be the same afterward, this is just cosmetic refactoring.
author Rob Landley <rob@landley.net>
date Tue, 13 Nov 2012 17:14:08 -0600
parents 6df4ccc0acbe
children bfe79fc710da
comparison
equal deleted inserted replaced
693:4a5a250e0633 694:786841fdb1e0
1 /* vi: set sw=4 ts=4: 1 /* chvt.c - switch virtual terminals
2 *
3 * chvt.c - switch virtual terminals
4 * 2 *
5 * Copyright (C) 2008 David Anders <danders@amltd.com> 3 * Copyright (C) 2008 David Anders <danders@amltd.com>
6 4
7 USE_CHVT(NEWTOY(chvt, "<1", TOYFLAG_USR|TOYFLAG_SBIN)) 5 USE_CHVT(NEWTOY(chvt, "<1", TOYFLAG_USR|TOYFLAG_SBIN))
8 6
9 config CHVT 7 config CHVT
10 bool "chvt" 8 bool "chvt"
11 default y 9 default y
12 help 10 help
13 usage: chvt N 11 usage: chvt N
14 12
15 Change to virtual terminal number N. (This only works in text mode.) 13 Change to virtual terminal number N. (This only works in text mode.)
16 14
17 Virtual terminals are the Linux VGA text mode displays, ordinarily 15 Virtual terminals are the Linux VGA text mode displays, ordinarily
18 switched between via alt-F1, alt-F2, etc. Use ctrl-alt-F1 to switch 16 switched between via alt-F1, alt-F2, etc. Use ctrl-alt-F1 to switch
19 from X to a virtual terminal, and alt-F6 (or F7, or F8) to get back. 17 from X to a virtual terminal, and alt-F6 (or F7, or F8) to get back.
20 */ 18 */
21 19
22 #include "toys.h" 20 #include "toys.h"
23 21
24 /* Note: get_console_fb() will need to be moved into a seperate lib section */ 22 /* Note: get_console_fb() will need to be moved into a seperate lib section */
25 int get_console_fd() 23 int get_console_fd()
26 { 24 {
27 int fd; 25 int fd;
28 char *consoles[]={"/dev/console", "/dev/vc/0", "/dev/tty", NULL}, **cc; 26 char *consoles[]={"/dev/console", "/dev/vc/0", "/dev/tty", NULL}, **cc;
29 27
30 cc = consoles; 28 cc = consoles;
31 while (*cc) { 29 while (*cc) {
32 fd = open(*cc++, O_RDWR); 30 fd = open(*cc++, O_RDWR);
33 if (fd >= 0) return fd; 31 if (fd >= 0) return fd;
34 } 32 }
35 33
36 return -1; 34 return -1;
37 } 35 }
38 36
39 void chvt_main(void) 37 void chvt_main(void)
40 { 38 {
41 int vtnum, fd; 39 int vtnum, fd;
42 40
43 vtnum=atoi(*toys.optargs); 41 vtnum=atoi(*toys.optargs);
44 42
45 fd=get_console_fd(); 43 fd=get_console_fd();
46 // These numbers are VT_ACTIVATE and VT_WAITACTIVE from linux/vt.h 44 // These numbers are VT_ACTIVATE and VT_WAITACTIVE from linux/vt.h
47 if (fd < 0 || ioctl(fd, 0x5606, vtnum) || ioctl(fd, 0x5607, vtnum)) 45 if (fd < 0 || ioctl(fd, 0x5606, vtnum) || ioctl(fd, 0x5607, vtnum))
48 perror_exit(NULL); 46 perror_exit(NULL);
49 } 47 }