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comparison toys/pending/deallocvt.c @ 1241:3c855d5a75be draft

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openvt tries opening several devices to get an fd that points to the current console, without a need for read or write permissions. O_RDWR implies that both O_RDONLY and O_WRONLY would work, so skip it. Reindent.
author Isaac Dunham <ibid.ag@gmail.com>
date Thu, 03 Apr 2014 22:43:28 -0500
parents a31d747b0017
children
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1240:0d295a46f853 1241:3c855d5a75be
6 6
7 USE_DEALLOCVT(NEWTOY(deallocvt, ">1", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_NEEDROOT)) 7 USE_DEALLOCVT(NEWTOY(deallocvt, ">1", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_NEEDROOT))
8 8
9 config DEALLOCVT 9 config DEALLOCVT
10 bool "deallocvt" 10 bool "deallocvt"
11 depends on OPENVT 11 depends on OPENVT
12 default n 12 default n
13 help 13 help
14 usage: deallocvt [N] 14 usage: deallocvt [N]
15 15
16 Deallocate unused virtual terminal /dev/ttyN 16 Deallocate unused virtual terminal /dev/ttyN
17 default value of N is 0, deallocate all unused consoles 17 default value of N is 0, deallocate all unused consoles
18 */ 18 */
19 19
20 #include "toys.h" 20 #include "toys.h"
21 #include <linux/vt.h> 21 #include <linux/vt.h>
22 22
23 void deallocvt_main(void) 23 void deallocvt_main(void)
24 { 24 {
25 int fd; 25 int fd;
26 26
27 // 0 : deallocate all unused consoles 27 // 0 : deallocate all unused consoles
28 int vt_num = 0; 28 int vt_num = 0;
29 29
30 if (toys.optargs[0]) 30 if (toys.optargs[0])
31 vt_num = atolx_range(toys.optargs[0], 1, 63); 31 vt_num = atolx_range(toys.optargs[0], 1, 63);
32 32
33 fd = find_console_fd(); 33 fd = find_console_fd();
34 if (fd < 0) error_exit("can't open console"); 34 if (fd < 0) error_exit("can't open console");
35 35
36 xioctl(fd, VT_DISALLOCATE, (void *)(ptrdiff_t)vt_num); 36 xioctl(fd, VT_DISALLOCATE, (void *)(ptrdiff_t)vt_num);
37 } 37 }