Newsgroups: alt.sources
From: robert@lunatix.uucp (Robert Sexton)
Subject: fixnice - Change default nice value for users on SCO Unix
Date: Mon, 01 Jul 1991 15:59:10 GMT
Message-ID: <1991Jul01.155910.24760@lunatix.uucp>

Well here is a handy dandy little utility I wrote because I
thought the sysadmsh interface was too clumsy.  syntax:
fixnice <nicevalue> <user1> <user2> ...... <userN>
it is designed to take a list of users either from the standard
input or on the command line.  You need the following lines in
your Makefile to compile it:

CFLAGS = -DSecureWare
LDFLAGS = -lmalloc -lc_s -lprot


/*
 * Fixnice.c             
 * Set users /tcb file entries to a certain nice value.
 * For SCO unix 3.2, or any other poor saps who use SecureWare.
 * Robert Sexton 5/7/91  robert@lunatix.UUCP
 */

#include <stdio.h>
#include <memory.h>
/* TCB requirements */
#include <sys/types.h>
#include <sys/security.h>
#include <sys/audit.h>
#include <prot.h>
/* extras */

int changenice(char *username,int nice) ;

main(int argc, char *argv[])
{
int desired_nice;

int index; /* step through userlist */
int errorcode = 0;
int status;

char username[9]; /* We pass this to changenice */

/* first do the security bullshit call */
set_auth_parameters(argc,argv);

/* stupidity check */
if ( argc < 2 ) {
	fprintf(stderr,"Usage: fixnice [nice value] user1 user2 ... \n");
	fprintf(stderr,"  or: userlist|fixnice [nice value] \n");
	exit(1);
	}
/* get nice value, and do a little error check */
desired_nice = atoi(argv[1]);

if ( desired_nice < -20 || desired_nice > 20 ) {
	fprintf(stderr,"Acceptable nice values lie between -20 and 20\n");
	exit(1);
	}

if ( argc == 2 ) {
	while ( scanf("%s[\n\t ]",username) != EOF ) {
		if (changenice(username,desired_nice))
			errorcode++;
		}
	}
else {
	for (index=2;index < argc;index++) {
		sscanf(argv[index],"%s",username) ;
		if (changenice(username,desired_nice))
			errorcode++;
		}
	}
exit(errorcode);
} /* main() */

	
int changenice(char *username,int niceval) {
	
	struct pr_passwd *cur_usr;	/* we have to make a personal copy */
	struct pr_passwd *tmp_entry; /* getprpwname puts it's stuff here */
	
	tmp_entry = getprpwnam(username); /* get the pointer */

	/* sanity checks we do therse before any memcpys */

	if ( tmp_entry == NULL ) {
		fprintf(stderr,"Error looking up user %s\n",username);	
		return(1);
		}

	/* now we copy the static data someplace where we can modify it */

	/* malloc some memory */
	cur_usr = (struct pr_passwd *) malloc(sizeof(struct pr_passwd));
 
	memcpy(cur_usr,tmp_entry,sizeof(struct pr_passwd));

#ifdef DEBUG	
	fprintf(stderr,"%s old nice value:%d\n",username,cur_usr->ufld.fd_nice);
	fprintf(stderr,"system nice value:%d\n",cur_usr->sfld.fd_nice);
#endif	

	/* this is it, one field change */	
	cur_usr->ufld.fd_nice = niceval;

	/* now we tell it we changed a field.  We check against the */
	/* system defaults */

	if ( cur_usr->ufld.fd_nice != cur_usr->sfld.fd_nice ) {
		cur_usr->uflg.fg_nice = 1;
		fprintf(stderr,"Set user %s to nice value %d\n",\
			username,cur_usr->ufld.fd_nice);
		}
	else {
		cur_usr->uflg.fg_nice = 0;
		fprintf(stderr,"Set user %s to default nice value %d\n",\
			username,cur_usr->sfld.fd_nice);
		}

	if ( putprpwnam(username,cur_usr) == NULL ) {
		fprintf(stderr,"Error writing user %s\n",username);	
		return(1);
		}
	/* We don't want this data lying around */
	memset(cur_usr,0,sizeof(struct pr_passwd));
	free(cur_usr);
}



Robert Sexton,  Lexington Public Access Unix  (lunatix)
robert@lunatix.UUCP ukma!lunatix!robert
Bringing you the wonderful world of Unix since 1990.
`Money for nothing and your scripts for free'
-- 
Robert Sexton,  Lexington Public Access Unix  (lunatix)
robert@lunatix.UUCP ukma!lunatix!robert
Bringing you the wonderful world of Unix since 1990.
`Money for nothing and your scripts for free'