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Path: utzoo!hoptoad!well!ptsfa!lll-tis!ohlone!lll-winken!uunet!husc6!bbn!uwmcsd1!marque!ddsw1!karl
From: karl@ddsw1.UUCP
Newsgroups: alt.sources
Subject: Short 'n' dirty file space totaller
Message-ID: <239@ddsw1.UUCP>
Date: Mon, 5-Oct-87 18:15:58 EDT
Article-I.D.: ddsw1.239
Posted: Mon Oct  5 18:15:58 1987
Date-Received: Sat, 10-Oct-87 14:51:16 EDT
Organization: Traveller's Aid (ddsw1), Chicago Ill.
Lines: 59
Keywords: Microport (or is it system V) disk utility

Here's a real short, cheap-n-dirty disk usage tracker.  Pipe the output of
this program through sort(1) with the proper options, and you've got a nice
report of who's the biggest disk pig on your system.

Note that this is a CHEAP AND DIRTY way of doing the job, it's not
optimized, scrunched, or even reasonanbly conscientious about resource
consumption.  It also won't find files that are deliberately hidden (ie: not
in a user's $HOME).  It requires that the utility 'du' be on the system
somewhere in your PATH.  Lastly, it's unsupported, and has no man page.  But
what do you want for a thousand bytes of 'C' or thereabouts.

It does write errors to stderr, and output to standard output (stdout), so
at least you can separate errors (and warnings) from the useful part.

This code is hereby deemed public domain.  Do what you want with it.

/*	Make a disk usage report */
/*	Authored sometime in 1987 by Karl Denninger because we needed
	it to keep track of the disk pigs on our system			*/

#include	<stdio.h>
#include	<fcntl.h>
#include	<sys/types.h>
#include	<pwd.h>
#include	<errno.h>

extern	struct	passwd	*getpwent();

main()
{

	struct	passwd	*psw;
	FILE	*fid;
	char	tmp[80];

	while ((psw = getpwent()) != NULL) {
		if (psw->pw_uid >= 100) {		/* Ignore < 100 */
			if ((open(psw->pw_dir, O_CREAT|O_EXCL,000) < 0 ) &&
			    (errno = EISDIR)) {
				printf("%12s: ", psw->pw_name);
				fflush(stdout);
				strcpy(tmp, "cd ");
				strcat(tmp, psw->pw_dir);
				strcat(tmp, ";du|tail -1|cut -d. -f1");	/* How many blocks? */
				system(tmp);
				fflush(stdout);
			} else {
				unlink(psw->pw_dir);
				fprintf(stderr,"No directory for %s (%d)\n", psw->pw_name, psw->pw_uid);
			}
		} else fprintf(stderr,"Skipped user %s (%d)\n",psw->pw_name, psw->pw_uid);
	}
	fclose(fid);
	exit(0);
}

-- 

Karl Denninger				UUCP : ...ihnp4!ddsw1!karl
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