vt_ioctl.c (ef11f1b76a59833cfadbe88a9513ca01b14a2b88) vt_ioctl.c (dce05aa6eec977f1472abed95ccd71276b9a3864)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 1992 obz under the linux copyright
4 *
5 * Dynamic diacritical handling - aeb@cwi.nl - Dec 1993
6 * Dynamic keymap and string allocation - aeb@cwi.nl - May 1994
7 * Restrict VT switching via ioctl() - grif@cs.ucr.edu - Dec 1995
8 * Some code moved for less code duplication - Andi Kleen - Mar 1997

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38#include <linux/vt_kern.h>
39#include <linux/kbd_diacr.h>
40#include <linux/selection.h>
41
42char vt_dont_switch;
43extern struct tty_driver *console_driver;
44
45#define VT_IS_IN_USE(i) (console_driver->ttys[i] && console_driver->ttys[i]->count)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 1992 obz under the linux copyright
4 *
5 * Dynamic diacritical handling - aeb@cwi.nl - Dec 1993
6 * Dynamic keymap and string allocation - aeb@cwi.nl - May 1994
7 * Restrict VT switching via ioctl() - grif@cs.ucr.edu - Dec 1995
8 * Some code moved for less code duplication - Andi Kleen - Mar 1997

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38#include <linux/vt_kern.h>
39#include <linux/kbd_diacr.h>
40#include <linux/selection.h>
41
42char vt_dont_switch;
43extern struct tty_driver *console_driver;
44
45#define VT_IS_IN_USE(i) (console_driver->ttys[i] && console_driver->ttys[i]->count)
46#define VT_BUSY(i) (VT_IS_IN_USE(i) || i == fg_console || vc_cons[i].d == sel_cons)
46#define VT_BUSY(i) (VT_IS_IN_USE(i) || i == fg_console || vc_is_sel(vc_cons[i].d))
47
48/*
49 * Console (vt and kd) routines, as defined by USL SVR4 manual, and by
50 * experimentation and study of X386 SYSV handling.
51 *
52 * One point of difference: SYSV vt's are /dev/vtX, which X >= 0, and
53 * /dev/console is a separate ttyp. Under Linux, /dev/tty0 is /dev/console,
54 * and the vc start at /dev/ttyX, X >= 1. We maintain that here, so we will

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871 v.v_cols = cols;
872 }
873 }
874
875 if (v.v_clin > 32)
876 return -EINVAL;
877
878 for (i = 0; i < MAX_NR_CONSOLES; i++) {
47
48/*
49 * Console (vt and kd) routines, as defined by USL SVR4 manual, and by
50 * experimentation and study of X386 SYSV handling.
51 *
52 * One point of difference: SYSV vt's are /dev/vtX, which X >= 0, and
53 * /dev/console is a separate ttyp. Under Linux, /dev/tty0 is /dev/console,
54 * and the vc start at /dev/ttyX, X >= 1. We maintain that here, so we will

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871 v.v_cols = cols;
872 }
873 }
874
875 if (v.v_clin > 32)
876 return -EINVAL;
877
878 for (i = 0; i < MAX_NR_CONSOLES; i++) {
879 struct vc_data *vcp;
880
881 if (!vc_cons[i].d)
882 continue;
883 console_lock();
879 if (!vc_cons[i].d)
880 continue;
881 console_lock();
884 vcp = vc_cons[i].d;
885 if (vcp) {
886 if (v.v_vlin)
887 vcp->vc_scan_lines = v.v_vlin;
888 if (v.v_clin)
889 vcp->vc_font.height = v.v_clin;
890 vcp->vc_resize_user = 1;
891 vc_resize(vcp, v.v_cols, v.v_rows);
892 }
882 if (v.v_vlin)
883 vc_cons[i].d->vc_scan_lines = v.v_vlin;
884 if (v.v_clin)
885 vc_cons[i].d->vc_font.height = v.v_clin;
886 vc_cons[i].d->vc_resize_user = 1;
887 vc_resize(vc_cons[i].d, v.v_cols, v.v_rows);
893 console_unlock();
894 }
895 break;
896 }
897
898 case PIO_FONT: {
899 if (!perm)
900 return -EPERM;

--- 550 unchanged lines hidden --- 		888 console_unlock();
889 }
890 break;
891 }
892
893 case PIO_FONT: {
894 if (!perm)
895 return -EPERM;

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