raj@limbo.UCI.EDU.UUCP (06/05/87)
We have about 10 Sun fileservers with lots of Sun 3/50's hanging off of each one. We cross mount all the areas containing users' files on every system (including all diskless systems). (This allows our users to simply log into ANY Sun machine and have their files right there.) Anyway, we had complaints from a lot of users about the fact that whenever any fileserver was brought down, they would get shutdown messages about it in all of their windows! I looked at the sources for xterm and found the #ifdef UTMP which disables logging a user in /etc/utmp. Not defining this code would take care of the problem, however it would also remove all information about who's logged in from where on *all* machines and we didn't like that. Thus I added yet another option to xterm! By specifying "-wh" on the command line it avoids writing an /etc/utmp entry and thus avoids wall messages in that window. Here are the changes: *** old_main.c Mon Dec 8 06:30:54 1986 --- main.c Thu Jun 4 13:19:31 1987 *************** *** 118,123 **** --- 118,126 ---- "VisualBell", /* DEF_VISUALBELL */ 0, }; + #ifdef UTMP + static int noutmp; + #endif UTMP main (argc, argv) int argc; *************** *** 139,144 **** --- 142,150 ---- char *getenv(); #endif KEYBD + #ifdef UTMP + noutmp = FALSE; + #endif UTMP xterm_name = (strcmp(*argv, "-") == 0) ? "xterm" : basename(*argv); term.flags = WRAPAROUND | SMOOTHSCROLL | AUTOREPEAT; *************** *** 634,639 **** --- 640,650 ---- case ARG_VB: screen->visualbell = i; continue; + #ifdef UTMP + case ARG_WH: + noutmp = TRUE; + continue; + #endif UTMP default: Syntax (); } *************** *** 786,791 **** --- 797,803 ---- {"ti", ARG_TI}, {"vb", ARG_VB}, {"w", ARG_BW}, + {"wh", ARG_WH}, }; argument(s) *************** *** 823,829 **** #endif ARG_K " [-n name] [-nb bell_margin] [-po] [-ps] [-rv] [-rw] [-s] \\\n", " [-sb] [-si] [-sk] [-sl save_lines] [-sn] [-st] [-t] [-tb] \\\n", ! " [-ti] [-vb] [=[width]x[height][[+-]xoff[[+-]yoff]]] \\\n", " [%[width]x[height][[+-]xoff[[+-]yoff]]] [#[+-]xoff[[+-]yoff]] \\\n", " [-e command_to_exec]\n\n", "Fonts must be of fixed width and of same size;\n", --- 835,841 ---- #endif ARG_K " [-n name] [-nb bell_margin] [-po] [-ps] [-rv] [-rw] [-s] \\\n", " [-sb] [-si] [-sk] [-sl save_lines] [-sn] [-st] [-t] [-tb] \\\n", ! " [-ti] [-vb] [-wh] [=[width]x[height][[+-]xoff[[+-]yoff]]] \\\n", " [%[width]x[height][[+-]xoff[[+-]yoff]]] [#[+-]xoff[[+-]yoff]] \\\n", " [-e command_to_exec]\n\n", "Fonts must be of fixed width and of same size;\n", *************** *** 854,859 **** --- 866,872 ---- "The -tb option disables the titlebar\n", "The -ti option places the window name under the icon\n", "The -vb option enables visual bell\n", + "The -wh option disables entering a /etc/utmp entry\n", 0 }; *************** *** 1190,1195 **** --- 1203,1209 ---- if((tslot = ttyslot()) <= 0) SysError(ERROR_TSLOT3); #ifdef UTMP + if(! noutmp) if((pw = getpwuid(screen->uid)) && (i = open(etc_utmp, O_WRONLY)) >= 0) { bzero((char *)&utmp, sizeof(struct utmp)); *************** *** 1344,1350 **** register int i; struct utmp utmp; ! if(!am_slave && tslot > 0 && (i = open(etc_utmp, O_WRONLY)) >= 0) { bzero((char *)&utmp, sizeof(struct utmp)); lseek(i, (long)(tslot * sizeof(struct utmp)), 0); write(i, (char *)&utmp, sizeof(struct utmp)); --- 1358,1364 ---- register int i; struct utmp utmp; ! if(!am_slave && tslot > 0 && !noutmp && (i = open(etc_utmp, O_WRONLY)) >= 0) { bzero((char *)&utmp, sizeof(struct utmp)); lseek(i, (long)(tslot * sizeof(struct utmp)), 0); write(i, (char *)&utmp, sizeof(struct utmp)); *** old_main.h Mon Dec 1 17:11:24 1986 --- main.h Thu Jun 4 11:28:31 1987 *************** *** 122,127 **** --- 122,128 ---- #define ARG_TB (ARG_T+1) #define ARG_TI (ARG_TB+1) #define ARG_VB (ARG_TI+1) + #define ARG_WH (ARG_VB+1) #define DEFBOLDFONT "vtbold" #define DEFBORDER 1 ----------------------------------------------------------------------------- Richard A. Johnson raj@rome.uci.edu (Internet) UCI ICS Assistant Technical Manager ucbvax!ucivax!raj (UUCP) Postmaster / Network Services raj@limbo.uci.edu (via Nameservers)
leres@ucbarpa.Berkeley.EDU.UUCP (06/05/87)
The "standard" version of wall writes to all tty's that have utmp
entries. The Sun version is hacked so that it ignores pty's that don't
have anything in the host field. So instead of adding a flag to
completely skip the utmp code, I just added a simple test in main.c:
+ if (strcmp("unix:0", DisplayName()) != 0)
(void) strcpy(utmp.ut_host, DisplayName());
(I never liked having "unix:0" in the utmp anyway; it was nice to find
a legitimate reason for nuking it.)
Craig