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#import "ProcessManager.h"
#import <signal.h>
/*===========================================================================
File: ProcessManager.m
Purpose: This file implements the following:
o tty listing
o user process listing
o tty logout
Algorithm: This function opens a pipe to the UNIX command ps.
Note: Because this file relies on the results of another execed
program, there are potential security holes if this
program is run setuid. Please do not run this program
setuid unless you know what you are doing.
===========================================================================*/
id processManager;
@implementation ProcessManager
- init
{
[super init];
processManager = self;
return self;
}
/*===========================================================================
Method: readTTYProcesses: tty
Purpose: To get process information about the terminal "tty" and
display this information in the Text Object refered to by the
pointer "myTextObject"
===========================================================================*/
- readTTYProcesses: (char *) tty
{
FILE *fp;
char tempPipe[256], line[1024];
char buffer[20480];
[myWindow makeKeyAndOrderFront:self];
sprintf(tempPipe,"/bin/ps -auxwt%s | grep -v '/bin/ps'", tty);
bzero(buffer, 20480);
fp = popen(tempPipe, "r");
if (fp == NULL)
NXRunAlertPanel("TTY Process Listing", "Cannot open Pipe to ps", "Ok", NULL, NULL);
else
{
while(fgets(line, 1024, fp))
strcat(buffer,line);
fclose(fp);
[myTextObject setText:buffer];
}
return(self);
}
/*===========================================================================
Method: readUserProcesses: name
Purpose: To get process information about the user "name" and
display this information in the Text Object refered to by the
pointer "myTextObject"
===========================================================================*/
- readUserProcesses: (char *) name
{
FILE *fp;
char tempPipe[256], line[1024];
char buffer[20480];
[myWindow makeKeyAndOrderFront:self];
sprintf(tempPipe,"/bin/ps -auxw | grep %s | grep -v '/bin/ps' | grep -v grep", name);
bzero(buffer, 20480);
strcpy(buffer,"USER PID %CPU %MEM VSIZE RSIZE TT STAT TIME COMMAND\n");
fp = popen(tempPipe, "r");
if (fp == NULL)
NXRunAlertPanel("TTY Process Listing", "Cannot open Pipe to ps", "Ok", NULL, NULL);
else
{
while(fgets(line, 1024, fp))
strcat(buffer,line);
fclose(fp);
[myTextObject setText:buffer];
}
return(self);
}
/*===========================================================================
Method: logoutTTY: tty
Purpose: To kill the csh (sh/tcsh) associated with terminal TTY.
Feedback: An alert panel is displayed if the terminal could not
be killed.
NOTE: Some people may want to run WhosOnFirst setuid root so that
the person on the console can kill any user. This is OK,
but make sure you understand the security implications
of running this program setuid root.
(Personally, I wouldn't run this program setuid root). :-)
===========================================================================*/
- logoutTTY:(char *) ttyname
{
FILE *fp;
char tempPipe[256], line[1024];
int pid;
sprintf(tempPipe,"/bin/ps -xt%s | grep 'sh)'", ttyname);
fp = popen(tempPipe, "r");
if (fp == NULL)
NXRunAlertPanel("Logout TTY", "Cannot open Pipe to ps", "Ok", NULL, NULL);
else
{
fgets(line, 1024, fp);
fclose(fp);
sscanf(line, "%d", &pid);
if (kill(pid, SIGKILL)!=0)
NXRunAlertPanel("Logout TTY", "Cannot kill terminal %s", "Ok", NULL, NULL, ttyname);
}
return(self);
}
@end
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.