barton@killer.DALLAS.TX.US (Barton Fisk) (01/27/89)
I need a user to be able to run a shell script to disable a serial line for dial out. This is due to the fact that the comm prog we are using DOES NOT support ungetty on SCO 2.2. I CAN NOT use cu or uucp for transfer of files to this particular location. So, in order for me to be able to run this comm prog (Blast), I must first disable the line or I get an error (comm port in use). Then after transfer is made, I need this script to re-enable the line. In normal everyday operation this line is both dial-in and dial-out. If anyone can help me do this without having to become root, I would greatly appreciate the help. Also, when I tried to invoke ungetty from the script before calling in my comm prog, the getty refused to be suspended and upon trying to dial-out afterwards the message "DIALOUT is on tty1A" was produced. Thanks again for any suggestions. Barton A. Fisk Barton A. Fisk & Co., Inc. P.O. Box 1781 Lake Charles, La. 70602 (318) 439-5984 -------------------------------------------------------- +++++++ Can anything good come out of Louisiana? ++++++ --------------------------------------------------------
jbayer@ispi.UUCP (Jonathan Bayer) (01/28/89)
In article <6932@killer.DALLAS.TX.US> barton@killer.DALLAS.TX.US (Barton Fisk) writes: >I need a user to be able to run a shell script to disable a serial >line for dial out. > [deleted] > >So, in order for me to be able to run this comm prog (Blast), I >must first disable the line or I get an error (comm port in use). > >Then after transfer is made, I need this script to re-enable the >line. > One thing you might try is to write a couple of small programs which would simple call enable and disable with the appropriate uids set. That way you can have a setuid program doing the work without letting anybody become root. Jb -- Jonathan Bayer Beware: The light at the end of the Intelligent Software Products, Inc. tunnel may be an oncoming dragon 19 Virginia Ave. ...uunet!ispi!jbayer Rockville Centre, NY 11570 (516) 766-2867 jbayer@ispi
root@conexch.UUCP (Larry Dighera) (02/01/89)
In article <6932@killer.DALLAS.TX.US> barton@killer.DALLAS.TX.US (Barton Fisk) writes: >I need a user to be able to run a shell script to disable a serial >line for dial out. > >If anyone can help me do this without having to become root, I >would greatly appreciate the help. > >Also, when I tried to invoke ungetty from the script before >calling in my comm prog, the getty refused to be suspended and >upon trying to dial-out afterwards the message "DIALOUT is on >tty1A" was produced. > >Thanks again for any suggestions. > > >Barton A. Fisk There are many approaches that can be used to accomplish this. Most of them will require that you trust the user of the communications program to some extent. Given that the files in question have the following default permissions: -rwsr-xr-x 1 lp bin 19500 May 16 1988 /bin/disable -rwsr-xr-x 1 lp bin 14932 May 16 1988 /bin/enable crw-r----- 1 uucp uucp 5,128 Jan 31 11:54 /dev/tty1A -rw-rw-r-- 1 root root 304 Jan 31 10:59 /etc/ttys you could put the communications program user in a unique group during the communications session with the newgrp command, and have the group on the above files set to that group. This is probably the simplest. The program below will allow users to run execute-only shell scripts as though they were root. So, if you put the disable command (and any other necessary commands) in a small shell script and call that script as an argument to exonly, it should work. You can use group permissions to limit the accessibility of exonly to trusted users. On the other hand, depending on security considerations on the system, you may find this approach unacceptable. Larry Dighera =========================== exonly.c begins ============================= /* * exonly.c * Author: Stephen Kochan * exonly opens the (execute-only) shell program, * given as the first argument, onto * standard input and executes the shell. * * exonly must be SUID to the owner * of the shell program or root. * * * This source is based on the listing in the June '87 issue of * UNIX/WORLD Magizine, pp 95. Entered by Larry Dighera * The Consultants' Exchange BBS (714) 842-6348/5851. */ #include <stdio.h> main (argc, argv) int argc; char *argv[]; { /* * Check number of arguments. If < 2, no file * was specified, so generate error message and exit. */ if (argc < 2) { fprintf (stderr, "exonly: needs file\n"); exit (1); } /* * Check accessibility of shell program by REAL uid. */ if (access (argv[1], 1) == -1) { fprintf (stderr, "exonly: cannot execute %s\n",argv[1]); exit (2); } /* * Close standard inpput and re-open with first argument. * Generate error message if file can't be opened. */ close (0); if (open (argv[1], 0) < 0) { fprintf (stderr, "exonly: cannot open %s\n", argv[1]); exit (3); } /* * Turn off setuid/setgid capability now that file is open. */ /* * (You may want to comment this out depending on the necessity * for your user to have an effective id of root to run * the necessary commands.) */ setgid (getgid ()); setuid (getuid ()); /* * Set up argument list to /bin/sh. */ argv[0] = "/bin/sh"; argv[1] = "-s"; /* reads shell script from stdin */ /* * exec /bin/sh with -s option. Pass any arguments * along in the argv list. Print error message * if we can't exec /bin/sh. */ execv ("/bin/sh", argv); fprintf (stderr, "exonly: cannot exec /bin/sh\n"); exit (4); } =========================== exonly.c ends ============================= -- USPS: The Consultants' Exchange, PO Box 12100, Santa Ana, CA 92712 TELE: (714) 842-6348: BBS (N81); (714) 842-5851: Xenix guest account (E71) UUCP: conexch Any ACU 2400 17148425851 ogin:-""-ogin:-""-ogin: nuucp UUCP: ...!uunet!turnkey!conexch!root || ...!trwrb!ucla-an!conexch!root
cmm1@CUNIXA.CC.COLUMBIA.EDU (Christopher M Mauritz) (05/23/89)
Does anyone out there have a small program that will cause a pc to reboot? I am writing a batch file that creates a ramdisk, fills it with stuff, runs a few programs and then ends. I would like to have the batch file get rid of the RAMdisk and then reboot at the end. Could someone help me out? If such an animal exists, could someone uuencode it and send it to me? I'm getting a bit desperate, as I've been trying to get this stupid thing to work for about a week. I don't read this newsgroup very often so please send any replies directly to me. THANKS! Chris Mauritz cmm1@cunixa.cc.columbia.edu No points for second best!!
fisher@sc2a.unige.ch (Markus Fischer) (06/05/89)
In article <8905231642.AA09814@cunixa.cc.columbia.edu>, cmm1@CUNIXA.CC.COLUMBIA.EDU (Christopher M Mauritz) writes: > Does anyone out there have a small program that will cause a pc to reboot? I do ! This question certainly has much better answers, but here is one that works for my IBM AT 2. The idea comes from the implementation of the <Alt-Ctrl-Del> key in some obscure keyboard driver from DOS 2.11... i.e. jumping to the right address. I have heard say there is an interrupt, you might want to check that also... Cut these two files as `*.deb' or the like, then feed them to DEBUG, as: prompt> DEBUG < BOOT.DEB They simply say `a'ssemble (follows the code... an empty line to stop), `n'ame the file as (string), `rcx' - new value for CX, containing the length of the file, `n' being the length, `w'rite the file, and `q'uit ! --- COLDBOOT.DEB ---------------------------------------------- a JMP F000:FFF0 n COLDBOOT.COM rcx 5 w q --- WARMBOOT.DEB ---------------------------------------------- a MOV AX,0040 MOV ES,AX ES: MOV WORD PTR [0072],1234 JMP F000:FFF0 n WARMBOOT.COM rcx 11 w q --------------------------------------------------------------- Voila`! The only difference between the two is that the `warm'boot doesn't count the memory again. Hope this is useful ! Markus Fischer -|--|--|--|--|--|--I Department of Anthropology -|--|--|--|--|--|--|-(#)-I University of Geneva -|--|--|--|--|--|--|--|--|-(#)-|-(#)(#)(_)-I CH-1227 Carouge (GE) -&-(_)-|--|--|-(#)-&--|-(#)(#)(_)(#)-&-(_)(#)-I Switzerland -|--|--|--|--|-(#)(_)-|-(_)(_)(_)(#)-I black (#) to kill ! --|--|-(#)(_)(_)(_)(#)(#)(_)(_) fisher@sc2a.unige.ch =+==+==+==+==+==+==+==+==+==+==+==+==+==+==+=(#)=+ fisher@cgeuge52.bitnet
brent@sactoh0.UUCP (Brent K. Barrett) (11/16/89)
HELP! I'm in some trouble here, and all the debugging I'm capable
of hasn't helped (yet). I'm working on a project called TPR (what
it does isn't important) in Turbo C 2.0.
The problem: TLINK reports "Undefined symbol 'FPE1st' in module
EMUINIT" (and the same for 'FPElast'). I will include my MAKEFILE
and a copy of the MAP file.
I've done many programs using the emu.lib and floating point data
types, so it's not something new to me. This, however, has never
happened before. The only floating point is in one function in the
module entitled "main.c." The float type is part of a structure,
and is also referenced when printed by printf(). I will include
the function as well at the end of this message.
Please respond by mail only as I'm not always reading these
newsgroups. Thank you very much.
MAKEFILE:
.c.obj:
tcc -mc -Id:\src\novu -c $<
tpr.exe: main.obj misc.obj screen.obj file.obj help.obj
tlink /c d:\src\novu\c0c main misc screen file help, tpr,,\
d:\src\novu\emu d:\src\novu\cc
main.obj: tpr.h
misc.obj: tpr.h
screen.obj: tpr.h
file.obj: tpr.h
help.obj: tpr.h
MAP FILE:
Start Stop Length Name Class
00000H 03D12H 03D13H _TEXT CODE
03D20H 06316H 025F7H EMU_PROG CODE
06320H 06736H 00417H E87_PROG CODE
06740H 07059H 0091AH _DATA DATA
0705AH 0705DH 00004H _EMUSEG DATA
0705EH 0705FH 00002H _CRTSEG DATA
07060H 07061H 00002H _CVTSEG DATA
07062H 07067H 00006H _SCNSEG DATA
07068H 08057H 00FF0H _BSS BSS
08058H 08058H 00000H _BSSEND STACK
08060H 08145H 000E6H _STACK STACK
Undefined symbol 'FPE1st' in module EMUINIT
Undefined symbol 'FPElast' in module EMUINIT
Program entry point at 0000:0000
/*
* do_calc()
*/
void do_calc(int m_min, int m_max, int c_min, int c_max)
{
struct {
int min;
int max;
float sens;
} ctrl[9] = { { 40, 65, 0.48F }, /* Johnson Controls values
*/
{ 60, 85, 0.48F },
{ 50, 100, 0.24F },
{ 20, 120, 0.12F },
{ 0, 100, 0.12F },
{ 50, 150, 0.12F },
{ -40, 160, 0.06F },
{ 40, 240, 0.06F },
{ 200, 400, 0.06F }
};
char which;
float ratio;
int m_temp;
int c_temp;
gotoxy(1, 25);
for (which=0; which<9; which++)
printf("Min=%d, Max=%d, Sens=%f\n", ctrl[which].min,
ctrl[which].max,
ctrl[which].sens);
getch();
}
(Note: this is only a test function at this time, hence the lack
of use of the arguments :-).
--
//////// Novucivitas: The Future of Citadel ////////
/// US 916 725 0674 3/12/2400 bps GEMAIL: B.K.BARRETT ///
//////// ..ames!pacbell!sactoh0!brent //////// evas@cs.eur.nl (Eelco van Asperen) (11/16/89)
brent@sactoh0.UUCP (Brent K. Barrett) writes: > The problem: TLINK reports "Undefined symbol 'FPE1st' in module >EMUINIT" (and the same for 'FPElast'). I will include my MAKEFILE >and a copy of the MAP file. Try including the math-library (MATHC.LIB for Compact-model). That should solve the problem. [Algorithm: TDUMP MATHC.LIB | grep FPE1 ] -- Eelco van Asperen Uucp: evas@cs.eur.nl || Earn/Bitnet: asperen@hroeur5 "Stick a fork in their ass and turn them over, they're done", Lou Reed, Last Great American Whale
john@wsl.UUCP (John Allen on wsl) (11/18/89)
In article <2101@sactoh0.UUCP>, brent@sactoh0.UUCP (Brent K. Barrett) writes: > > The problem: TLINK reports "Undefined symbol 'FPE1st' in module You are missing the mathc.lib on the tlink command line. -- People that don't know want to know from the people that do know and if the poeple that do know don't tell the people that don't know then the people that don't know still won't know. "Don't quote me on any issue whatsoever."
brent@sactoh0.UUCP (Brent K. Barrett) (11/19/89)
I want to thank the one fellow who did respond. Although my problem wasn't really related to the solution he suggested, it was very nice of him to at least try. I solved the problem myself after some work and a big SMACK on the head when I realized how stupid I was. I had forgotten to include to math library for the model I was using! Ugh. Thank you for your time. -- //////// Novucivitas: The Future of Citadel //////// /// US 916 725 0674 3/12/2400 bps GEMAIL: B.K.BARRETT /// //////// ..ames!pacbell!sactoh0!brent ////////
65820@neabbs.UUCP (RONALD VAN EIJCK) (03/28/90)
We need HELP:
1: We want to use an MS-DOS parallel port as some kind of userport.
Therefore we have to be able to access this port directly and to change
the input/output of the datalines/statuslines.
We want to know whether this is possible and how to access the port.
2: Borland's PUTIMAGE is not fast enough for our application. does anybody
know how to access the video ram of a VGA card? As far as we know the
first plane starts at A000:0000 where do the other 3 planes start?
3: We have problem's setting the mousecursor on a VGA graphics screen.
Does anyone know where we can find some code doing this in turbo pascal
We are using Turbo Pascal 5.5 on a 286 2MB AT
Thanks in advance,
Ronald van Eijck
R&R Software
The Netherlands