Путь: Toys/Other, команды версии: Ver.4 Ver.9 Комментарии в файле openvt.c : Команд: 3 openvt
chvt
deallocvt
Исходный текст в файле openvt.c #define FOR_openvt #include "toys.h" #include <linux/vt.h> #include <linux/kd.h> GLOBALS( long c; ) static int open_console(void) { char arg = 0, *console_name[] = {"/dev/tty", "/dev/tty0", "/dev/console"}; int i, fd; for (i = 0; i < ARRAY_LEN(console_name); i++) { if (0>(fd = open(console_name[i], O_RDWR))) continue; if (!ioctl(fd, KDGKBTYPE, &arg)) return fd; close(fd); } for (fd = 0; fd < 3; fd++) if (!ioctl(fd, KDGKBTYPE, &arg)) return fd; error_exit("can't open console"); } static int activate(int fd, int cc) { return ioctl(fd, VT_ACTIVATE, cc) || ioctl(fd, VT_WAITACTIVE, cc); } void openvt_main(void) { struct vt_stat vstate; int fd, cc = (int)TT.c; pid_t pid; // find current console if (-1 == (ioctl(fd = open_console(), VT_GETSTATE, &vstate)) || (!cc && 0>=(cc = xioctl(fd, VT_OPENQRY, &fd)))) perror_exit("can't find open VT"); sprintf(toybuf, "/dev/tty%d", cc); if (!(pid = XVFORK())) { close(0); //new vt becomes stdin dup2(dup2(xopen_stdio(toybuf, O_RDWR), 1), 2); if (FLAG(s)) activate(0, cc); setsid(); ioctl(0, TIOCSCTTY, 0); if (fd>2) close(fd); xexec(toys.optargs); } if (FLAG(w)) { while (-1 == waitpid(pid, NULL, 0) && errno == EINTR) errno = 0; if (FLAG(s)) { activate(fd, vstate.v_active); dprintf(2, "%d\n", ioctl(fd, VT_DISALLOCATE, cc)); } } } void chvt_main(void) { if (activate(open_console(), atoi(*toys.optargs))) perror_exit_raw(*toys.optargs); } void deallocvt_main(void) { int fd = open_console(), vt_num = 0; // 0 = all if (*toys.optargs) vt_num = atolx_range(*toys.optargs, 1, 63); if (-1 == ioctl(fd, VT_DISALLOCATE, vt_num)) perror_exit("%d", vt_num); } |
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