gjf00@duts.ccc.amdahl.com (Gordon Freedman) (02/13/91)
I am writing my own version of xrsh which allow specifying a userid as well as the remote host. It also uses csh rather than sh as xrsh does. The idea is to remotely run an x application from an rhost as painlessly as possible. This requires a few things, two of which I have questions about: 1) How do I get the name of the display device? Sometimes the env variable DISPLAY is correct, but other times it is not, so I have to obtain the actual display name (the ip address is probably ok too). I am using this for the "-display ..." parameter to the x program running on the rhost. One thing I can do is lookup the utmp entry indexed by ttyslot, but this only works sometimes. An example of where it doesn't work is when you are logged into compute host "A" from xterm "B", and rlogin to host "C". Indexing into utmp gives "A" rather than "B", which is not the display device. 2) How can I determine if the display device is an xterm which does not require doing "xhost + rhost", as opposed to a display device attached directly to a workstation (which will require xhost + rhost). We don't use any security on the xterms, so I don't know if there are cases where "xhost + rhost" is even meaningful for an xterm. Our workstations do need to do the "xhost +", so I wrap the rsh execution within "xhost + rhost" and "xhost - rhost". For xterms, this is unneccessary so I want to skip it. We are using mostly SPARC IPCs running X11-R4.0. Please email replies to gjf00@duts.ccc.amdahl.com, as I don't always get to read this newsgroup. Thanks in advance! -- Gordon Freedman: gjf00@duts.ccc.amdahl.com Disclaimer: My opinions! Not my employers!