Mercurial > hg > toybox
annotate toys/chvt.c @ 234:163498bf547b
Move NEWTOY() list from end of toylist.h to generated/newtoys.h.
| author | Rob Landley <rob@landley.net> |
|---|---|
| date | Sat, 19 Jan 2008 17:43:27 -0600 |
| parents | d4176f3f3835 |
| children | e6273440c9c0 |
| rev | line source |
|---|---|
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d4176f3f3835
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1 /* vi: set sw=4 ts=4: |
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2 * |
| 229 | 3 * chvt.c switch virtual terminals |
| 4 * | |
| 5 * Copyright (C) 2008 David Anders <danders@amltd.com> | |
| 6 * | |
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7 * Not in SUSv3. |
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8 |
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234
163498bf547b
Move NEWTOY() list from end of toylist.h to generated/newtoys.h.
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9 USE_CHVT(NEWTOY(chvt, "<1", TOYFLAG_USR|TOYFLAG_SBIN)) |
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163498bf547b
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10 |
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11 config CHVT |
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12 bool "chvt" |
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13 default y |
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14 help |
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15 usage: chvt N |
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16 |
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17 Change to virtual terminal number N. (This only works in text mode.) |
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18 |
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19 Virtual terminals are the Linux VGA text mode displays, ordinarily |
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20 switched between via alt-F1, alt-F2, etc. Use ctrl-alt-F1 to switch |
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21 from X to a virtual terminal, and alt-F6 (or F7, or F8) to get back. |
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22 */ |
| 229 | 23 |
| 24 #include "toys.h" | |
| 25 | |
| 26 #define VT_ACTIVATE 0x5606 | |
| 27 #define VT_WAITACTIVE 0x5607 | |
| 28 | |
| 29 /* note get_console_fb() will need to be moved into a seperate lib section */ | |
| 30 int get_console_fd() | |
| 31 { | |
| 32 int fd; | |
| 33 | |
| 34 fd = open("/dev/console", O_RDWR); | |
| 35 if (fd >= 0) | |
| 36 return fd; | |
| 37 | |
| 38 fd = open("/dev/vc/0", O_RDWR); | |
| 39 if (fd >= 0) | |
| 40 return fd; | |
| 41 | |
| 42 fd = open("/dev/tty", O_RDWR); | |
| 43 if (fd >= 0) | |
| 44 return fd; | |
| 45 | |
| 46 return -1; | |
| 47 } | |
| 48 | |
| 49 void chvt_main(void) | |
| 50 { | |
| 51 int vtnum,fd; | |
| 52 | |
| 53 | |
| 54 if(!*toys.optargs) | |
| 55 return; | |
| 56 | |
| 57 vtnum=atoi(*toys.optargs); | |
| 58 | |
| 59 fd=get_console_fd(); | |
| 60 if (fd < 0) | |
| 61 return; | |
| 62 | |
| 63 if (ioctl(fd,VT_ACTIVATE,vtnum)) | |
| 64 return; | |
| 65 | |
| 66 if (ioctl(fd,VT_WAITACTIVE,vtnum)) | |
| 67 return; | |
| 68 | |
| 69 } |