Patch to allow "sysinfo" change to the current active window.

[Lenny Tropiano]

I made a few changes to allow only one sysinfo process display on
the software label lines on your currently active window.  The only
drawback to this is that the software labels of the User Agent, or
another process that displays labels, will be over written by the
sysinfo information.

There might be a delay between the window manager's window activation 
and the new display of the information.  This depends on how fast the
window manager creates the new window (system load).  The SIGWIND
signal is caught, and a new CURRENT window is gotten, but if the system
is slow it will still be the old window.  In that case the information
won't be displayed until the sleep(SLEEP) is done.

Apply the following patch with "patch" :-)

--- cut here for patch --- --- cut here for patch --- --- cut here for patch ---

*** sysinfo.c	Sat Jan 30 22:31:05 1988
--- ../sysinfo.c	Sat Jan 30 22:21:48 1988
***************
*** 4,9
  ** Programmer:   Lenny Tropiano            UUCP: ...icus!lenny          **
  ** Organization: ICUS Computer Group       (c)1988                      **
  ** Date:         January 23, 1988                                       **
  **                                                                      **
  **************************************************************************
  **                                                                      **

--- 4,10 -----
  ** Programmer:   Lenny Tropiano            UUCP: ...icus!lenny          **
  ** Organization: ICUS Computer Group       (c)1988                      **
  ** Date:         January 23, 1988                                       **
+ ** Patchlevel:   1    [Updated to switch to current window]             **
  **                                                                      **
  **************************************************************************
  **                                                                      **
***************
*** 34,39
  #include <sys/window.h>
  #include <sys/filsys.h>
  #include <utmp.h>
  
  #define	MINUTE	60L
  #define	HOUR	(60L * 60L)

--- 35,41 -----
  #include <sys/window.h>
  #include <sys/filsys.h>
  #include <utmp.h>
+ #include <setjmp.h>
  
  #define	MINUTE	60L
  #define	HOUR	(60L * 60L)
***************
*** 49,54
  #define TRUE	1
  #endif
  
  char	*progname;			/* program name			*/
  char	mailfile[30];			/* mailbox file name            */
  struct  utdata utd;			/* Window data structure        */

--- 51,58 -----
  #define TRUE	1
  #endif
  
+ int	wd;				/* window descriptor		*/
+ jmp_buf	jmpbuf;				/* save the current environ	*/
  char	*progname;			/* program name			*/
  char	mailfile[30];			/* mailbox file name            */
  struct  utdata utd;			/* Window data structure        */
***************
*** 98,103
  
  info_process()
  {
  	char	mailbuffer[40];
  
  	while (TRUE) {

--- 102,108 -----
  
  info_process()
  {
+ 	int	refrsh();
  	char	mailbuffer[40];
  
   	signal (SIGWIND, refrsh);
***************
*** 100,105
  {
  	char	mailbuffer[40];
  
  	while (TRUE) {
  		filestatus();
  		uptime();

--- 105,112 -----
  	int	refrsh();
  	char	mailbuffer[40];
  
+  	signal (SIGWIND, refrsh);
+ 
  	while (TRUE) {
  		setjmp(jmpbuf);
  		open_current_window();
***************
*** 101,106
  	char	mailbuffer[40];
  
  	while (TRUE) {
  		filestatus();
  		uptime();
  		mailcheck(mailbuffer);

--- 108,116 -----
   	signal (SIGWIND, refrsh);
  
  	while (TRUE) {
+ 		setjmp(jmpbuf);
+ 		open_current_window();
+ 
  		filestatus();
  		uptime();
  		mailcheck(mailbuffer);
***************
*** 112,118
  			hrs, (hrs  == 1) ? " " : "s",
  			mins,(mins == 1) ? " " : "s"
  		);
!         	ioctl(0, WIOCSETTEXT, &utd);
  
  		utd.ut_num = WTXTSLK2;
  		sprintf(utd.ut_text,LINE_2,

--- 122,128 -----
  			hrs, (hrs  == 1) ? " " : "s",
  			mins,(mins == 1) ? " " : "s"
  		);
!         	ioctl(wd, WIOCSETTEXT, &utd);
  
  		utd.ut_num = WTXTSLK2;
  		sprintf(utd.ut_text,LINE_2,
***************
*** 120,127
  		   (int)((((float)fs.s_tfree / (float)fs.s_fsize) + 0.005) 
  			   * 100.0), fs.s_tinode
  		);
!         	ioctl(0, WIOCSETTEXT, &utd);
! 
  		sleep(SLEEP);
  	}
  }

--- 130,137 -----
  		   (int)((((float)fs.s_tfree / (float)fs.s_fsize) + 0.005) 
  			   * 100.0), fs.s_tinode
  		);
!         	ioctl(wd, WIOCSETTEXT, &utd);
! 		close(wd);
  		sleep(SLEEP);
  	}
  }
***************
*** 124,129
  
  		sleep(SLEEP);
  	}
  }
  
  int terminate()

--- 134,173 -----
  		close(wd);
  		sleep(SLEEP);
  	}
+ }
+ 
+ int refrsh()
+ {
+ 	int	window, 
+ 		dummy, 
+ 		refrsh();
+ 	char	windev[9];
+ 
+ 	signal(SIGWIND,SIG_IGN);
+ 	window = ioctl(0, WIOCGPREV, dummy);
+ 	sprintf(windev,"/dev/w%d",window);
+ 	if ((wd = open(windev,O_RDWR|O_NDELAY)) == -1) 
+ 		wd = 0;
+ 	utd.ut_num = WTXTSLK1;		/* clear the label area     */
+ 	utd.ut_text[0] = '\0';
+         ioctl(wd, WIOCSETTEXT, &utd);
+ 	utd.ut_num = WTXTSLK2;
+         ioctl(wd, WIOCSETTEXT, &utd);
+ 	close(wd);			/* close previous window    */
+ 	longjmp(jmpbuf, 0);		/* return back to main loop */
+ }
+ 
+ int open_current_window()
+ {
+ 	int	window, 
+ 		dummy, 
+ 		refrsh();
+ 	char	windev[9];
+ 
+ 	window = ioctl(0, WIOCGCURR, dummy);
+ 	sprintf(windev,"/dev/w%d",window);
+ 	if ((wd = open(windev,O_RDWR|O_NDELAY)) == -1) 
+ 		wd = 0;
  }
  
  int terminate()


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