gkm@cbnewsh.ATT.COM (gary.k.mc nees) (02/09/90)
I have a locking program which will lock any particular virtual terminal. However, all one has to do to get in is to key to another vt which is not locked. Its too much to lock all of them. Does anyone know how to securly lock the PC when the vtlmgr is running? Is there a way to keep the ALT key from being recognized? Any ideas? Has anyone written a program to lock one terminal when one has several terminals running and prevent access to other terminals? Any help will be greatly appriciated. Thank you Larry Cambell for the program for vt access using ALT-Fn. Sincerely Gary McNees att.com!erebus!gkmpc!gkm
wsinpdb@eutws1.win.tue.nl (Paul de Bra) (02/13/90)
In article <8030@cbnewsh.ATT.COM> gkm@cbnewsh.ATT.COM (gary.k.mc nees,ho,) writes: >I have a locking program which will lock any particular virtual terminal. >However, all one has to do to get in is to key to another vt which is not >locked. Its too much to lock all of them. Does anyone know how to securly >lock the PC when the vtlmgr is running? Is there a way to keep the ALT >key from being recognized? Any ideas? Has anyone written a program to lock >one terminal when one has several terminals running and prevent access to >other terminals? The key to the solution is in kd(7). One can set the vt-mode so the switching between vt's is disabled. Try something like: vtmode.mode = VT_PROCESS; vtmode.waitv = 1; vtmode.relsig = SIGUSR1; vtmode.acqsig = SIGUSR1; vtmode.frsig = SIGUSR2; if (ioctl(egafd, VT_SETMODE, &vtmode) < 0) fprintf(stderr,"Warning, cannot set VT mode\n"); signal(SIGUSR1, donothing); ... Paul. (debra@research.att.com)