/******************************************************************************/
/*									      */
/* Copyright (c) International Business Machines  Corp., 2001		      */
/*									      */
/* This program is free software;  you can redistribute it and/or modify      */
/* it under the terms of the GNU General Public License as published by       */
/* the Free Software Foundation; either version 2 of the License, or          */
/* (at your option) any later version.					      */
/*									      */
/* This program is distributed in the hope that it will be useful,	      */
/* but WITHOUT ANY WARRANTY;  without even the implied warranty of	      */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See	              */
/* the GNU General Public License for more details.			      */
/*									      */
/* You should have received a copy of the GNU General Public License	      */
/* along with this program;  if not, write to the Free Software		      */
/* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA    */
/*									      */
/******************************************************************************/

/******************************************************************************/
/*                                                                            */
/* History:     Oct - 10 - 2001 Created - Manoj Iyer, IBM Austin TX.          */
/*                               email:manjo@austin.ibm.com                   */
/*					- create a directory tree that is     */
/*				unique to each process. The base directory    */
/*				looks like hostname.<pid of the process>      */
/*				the subdirectories will be <pid>.0 <pid.1> etc*/
/*				eg:					      */
/*				    hostname.1234			      */
/*					       |_ 1234.0	              */
/*					               |_ 1234.1              */
/*					                      |_1234.2        */
/*								    |....     */
/*				hostname -  hostname of the machine           */
/*			        1234     -  pid of the current process.       */
/*			        Each of these directories are populated with  */
/*				N number of ".c" files and a makefile that can*/
/*				compile the ".c" files and also initiate      */
/*				compile of ".c" files in the subdirectories   */
/*				under it.			              */
/*                                                                            */
/*		Oct - 11 - 2001 Modified 				      */
/*				- fixed a bug in the makefiles, the last make-*/
/*				  file was expecting subdirectories. Added    */
/*				  code to generate a different makefile for   */
/*				  the last subdirectory.		      */
/*				- Added logic to first compile all the c files*/
/*				  and upon completion remove them.            */
/*			        - Added multithreading, arguments handling.   */
/*				  By default the program will generate 8      */
/*				  threads, each creating by default 100 deep  */
/*				  directory tree each containing default 100  */
/*			          ".c" files and one makefile.                */
/*			        - Added usage message.                        */
/*								              */
/*		Oct - 12 - 2001 Modified			              */
/*				- Added logic to print missing arguments to   */
/*				  options.                                    */
/*                                                                            */
/*		Oct - 15 - 2001 Modified			              */
/*				- Added logic to remove the files, makefiles  */
/*				  and subdirectories that were created.       */
/*			        - Added logic to print debug messages.        */
/*								              */
/*		Oct - 16 - 2001 Modified		                      */
/*				- Added sync() calls to commit changes.       */
/*				- Fixed bug. pthread_join() returns 0 when    */
/*			          pthread_join fails, if the thread function  */
/*				  fails pthread_join() will put the exit value*/
/*			          of the thread function in the thread_return */
/*				  output argument.			      */
/*				- Debugging function crte_mk_rm fails to      */
/*				  create fies, problem appears only in multi- */
/*				  threaded case.                              */
/*								              */
/*		Oct - 17 - 2001 Checked in		                      */
/*				- GPL statement was added and the initial ver */
/*			        - checked into CVS.		              */
/*			        - note: this version works only if it is run  */
/*				  single threaded, when its run multithreaded */
/*		                  random thread will fail on open() sys call  */
/*				  problem currently under investigation.      */
/*                                                                            */
/*		Oct - 20 - 2001 Modified				      */
/*				- fixed a whole bunch of problems.            */
/*			        - created function init_compile. Apparently   */
/*				  this code works!!.                          */
/*			        - removed system() system call that was doing */
/*				  make and make clean. init_compile() replaces*/
/*				  this piece of code.                         */
/*				- on supplying the full pathname to unlink()  */
/*				  solved most of the problems with rm_file_mk */
/*			          function.                                   */
/*				- reset the default vaulues for MAXT = 8      */
/*				  MAXD = 100 and MAXF = 100.                  */
/*				  ie. maximum number of threads = 8           */
/*				      directory depth (num of sub dirs) = 100 */
/*				      numeber of .c fils in each sub dir = 100*/
/*				- finally program is now in working state.    */
/*                                                                            */
/*		Nov - 01 - 2001 Modified.				      */
/*				- fixed usage message default MAXT is 8 not 1 */
/*				- fixed make to compile the files silently    */
/*									      */
/*		Nov - 19 - 2001 Modified.				      */
/*				- changed th_status in function main() from   */
/*				  dynamic variable to static array.           */
/*									      */
/* File:        make_tree.c                                                   */
/*                                                                            */
/* Description:	This program is designed stress the NFS implimentation.       */
/* 		Many bugs were uncovered in the AIX operating system          */
/*		implimentation of NFS when AIX kernel was built over NFS.     */
/*		Source directory on a remote machine (one server many clients)*/
/*		NFS-mounted on to a directory on a local machine from which   */
/*		the kernel build was initiated. Apparently many defects/bugs  */
/* 		were uncovered when multiple users tried to build the kernel  */
/* 		by NFS mounting the kernel source from a remote machine and   */
/* 		tried to build the kernel on a local machine. AIX build envi- */
/*		ronment is set up to create the object files and executable   */
/*		on the local machine. 					      */
/* 		This testcase will try to recreate such a senario.            */
/*		Spawn N number of threads. Each thread does the following.    */
/*		* Create a directory tree.                                    */
/*		* Populate it with ".c" files and makefiles.                  */
/*		* initate a build. Executable will print hello world when exed*/
/*		* clean up all the executables that were created.             */
/*		* recurssively remove each subdir and its contents.           */
/*		The test is aimed at stressing the NFS client and server.     */
/*				    hostname.1234			      */
/*                                             |                              */
/*				               | - 1234.0.0.c                 */
/*					       | - 1234.0.1.c                 */
/*                                             | - ..........                 */
/*					       | - makefile                   */
/*                                             |                              */
/*					       |_ 1234.0	              */
/*                                                    |                       */
/*				                      | - 1234.1.0.c          */
/*					              | - 1234.1.1.c          */
/*                                                    | - ..........          */
/*					              | - makefile            */
/*                                                    |                       */
/*					              |_ 1234.1               */
/*                                                           |                */
/*				                             | - 1234.2.0.c   */
/*					                     | - 1234.2.1.c   */
/*                                                           | - ..........   */
/*					                     | - makefile     */
/*                                                           |                */
/*					                     |_1234.2         */
/*								    |....     */
/*                                                                            */
/* Setup:	- on the server side:			                      */
/*		  * create a directory /nfs_test 		              */
/*		  * make an entry in /etc/exports file like this...           */
/*		    "/nfs_test *(rw,no_root_squash)"		              */
/*		  * run command "exportfs -a"		                      */
/*	        - on client side:			                      */
/*		  * create a directory say for eg: /nfs_cli                   */
/*		  * mount -t nfs servername:/nfs_test /nfs_cli                */
/*		  * set up the tescase in /nfs_cli directory		      */
/*		- I reccomend that you have atleast 8 client machines running */
/*		   this test, linux has 8 NFSD's running by default, you might*/
/*		   have to increase it as per your requirement.               */
/*		                                                              */
/* Note:	- assumed that NFS services are installed and configured      */
/*		- you have atleast 2 machines to act as client and server     */
/*		  (you can have muiltiple client machines and one server)     */
/*		- large amount of disk space, this depends on the number of   */
/*		  of clients you will have, if you have only one client, I    */
/*		  reccomend that the server have atleast 4 Giga bytes of      */
/*		  disk space (paranoid!).			              */
/*									      */
/******************************************************************************/

#include <stdio.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <pthread.h>
#include <sys/mount.h>
#include <linux/limits.h>
#include <errno.h>
#include <linux/unistd.h>

#define gettid() syscall(__NR_gettid)

#ifdef DEBUG
#define dprt(fmt, args...)	printf(fmt, ## args)
#else
#define dprt(fmt, args...)
#endif

#define MAKE_EXE	1	/* initate a make                             */
#define MAKE_CLEAN	0	/* initate a make clean                       */

#define PTHREAD_EXIT(val)    do {\
			exit_val = val; \
                        dprt("pid[%d]: exiting with %d\n", gettid(),exit_val); \
			pthread_exit((void *)exit_val); \
				} while (0)

#define OPT_MISSING(prog, opt)   do{\
			       fprintf(stderr, "%s: option -%c ", prog, opt); \
                               fprintf(stderr, "requires an argument\n"); \
                               usage(prog); \
                                   } while (0)

#define MAXD	100		/* default number of directories to create.           */
#define MAXF	100		/* default number of files to create.                 */
#define MAXT	8		/* default number of threads to create.               */

/******************************************************************************/
/*								 	      */
/* Function:	usage							      */
/*									      */
/* Description:	Print the usage message.				      */
/*									      */
/* Return:	exits with -1						      */
/*									      */
/******************************************************************************/
static void usage(char *progname)
{				/* name of this program                       */
	fprintf(stderr,
		"Usage: %s -d NUMDIR -f NUMFILES -h -t NUMTHRD\n"
		"\t -d Number of subdirectories to generate:   Default: 100\n"
		"\t -f Number of c files in each subdirectory: Default: 100\n"
		"\t -h Help!\n"
		"\t -t Number of threads to generate:          Default: 8\n",
		progname);
	exit(-1);
}

/******************************************************************************/
/*								 	      */
/* Function:	init_compile						      */
/*									      */
/* Description:	This function compiles the .c files and removes the exeutables*/
/*		This function does the same function as the system() system   */
/*		call, the code is available in the system() man page. When    */
/*		called with the parameter MAKE_EXE it will initiate make in   */
/*		the first directory created, the makefile is designed to build*/
/*		recursively all the files in the subdirectories below.        */
/*		When called with the MAKE_CLEAN parameter it will remove the  */
/*		executables that were created design is similar to the case   */
/*		were it initiates a make.                                     */
/*									      */
/* Return:	exits with 1 on error, 0 on success                           */
/*									      */
/******************************************************************************/
static int init_compile(int what_todo,	/* do a compile or clean             */
			char *base_dir,	/* base directory of the test        */
			char *hname)
{				/* hostname of the machine           */
	int status;		/* return status of execve process            */
	pid_t pid;		/* pid of the process that does compile       */
	char *dirname;		/* location where compile is initated         */
	char *command;		/* make or make clean command.                */

	if ((dirname = malloc(sizeof(char) * 2048)) == NULL) {	/* just paranoid */
		perror("init_compile(): dirname malloc()");
		return 1;
	}

	if ((command = malloc(sizeof(char) * 1024)) == NULL) {	/* just paranoid */
		perror("init_compile(): dirname malloc()");
		return 1;
	}

	what_todo ? sprintf(command, "make -s") : sprintf(command,
							  "make -s clean");

	sprintf(dirname, "%s/%s.%ld", base_dir, hname, gettid());

	if (chdir(dirname) == -1) {
		dprt("pid[%d]: init_compile(): dir name = %s\n", gettid(),
		     dirname);
		perror("init_compile() chdir()");
		free(dirname);
		return 1;
	}

	dprt("pid[%d]: init_compile(): command = %s\n", gettid(), command);

	if ((pid = fork()) == -1) {
		perror("init_compile(): fork()");
		return 1;
	}
	if (!pid) {
		char *argv[4];

		argv[0] = "/bin/sh";
		argv[1] = "-c";
		argv[2] = command;
		argv[3] = 0;

		if (execv("/bin/sh", argv) == -1) {
			perror("init_compile(): execv()");
			return 1;
		}
	}
	do {
		if (waitpid(pid, &status, 0) == -1) {
			if (errno != EINTR) {
				fprintf(stderr,
					"init_compile(): waitpid() failed\n");
				return 1;
			}
		} else {
			if (chdir(base_dir) == -1) {
				dprt("pid[%d]: init_compile(): dir = %s\n",
				     gettid(), dirname);
				perror("init_compile(): chdir()");
				return 1;
			}

			dprt("pid[%d]: init_compile(): status = %d\n", status);
			dprt("we are here %d\n", __LINE__);
			return status;
		}

	} while (1);
}

/******************************************************************************/
/*								 	      */
/* Function:	rm_file_dir						      */
/*									      */
/* Description: This function removes the .c files makefiles and directories. */
/*		First removes the files in the files in the last directory    */
/*		first then removes the last directory, then cycles through    */
/*		each subdirectory and does the same.			      */
/*									      */
/* Return:	exits with 1 on error, 0 on success      		      */
/*									      */
/******************************************************************************/
static int rm_file_dir(int numsdir,	/* how many subdirs to remove         */
		       int numfiles,	/* number of files to remove per dir  */
		       char *hname,	/* hostname of the client machine     */
		       char *base_dir)
{				/* directory where the test is located */
	int filecnt;		/* index to the num of files to remove */
	int dircnt;		/* index into directory tree          */
	int sindex = numsdir;	/* num subdirectory tree to remove    */
	char *dirname;		/* name of the directory to chdir()   */
	char *tmpdirname;	/* temp name for directory, for swap  */
	char *filename;		/* name of the cfile to remove        */
	char *subdir;		/* name of the sub dir to remove      */

	if ((dirname = malloc(sizeof(char) * 2048)) == NULL) {	/* just paranoid */
		perror("crte_mk_rm(): dirname malloc()");
		return 1;
	}

	if ((tmpdirname = malloc(sizeof(char) * 2048)) == NULL) {	/* just paranoid */
		perror("crte_mk_rm(): tmpdirname malloc()");
		return 1;
	}

	if ((filename = malloc(sizeof(char) * 2048)) == NULL) {	/* just paranoid */
		perror("crte_mk_rm(): filename malloc()");
		return 1;
	}

	if ((subdir = malloc(sizeof(char) * 2048)) == NULL) {	/* just paranoid */
		perror("crte_mk_rm(): subdir malloc()");
		return 1;
	}

	dprt("pid[%d]: base directory: %s\n", gettid(), base_dir);
	while (sindex) {
		/* get the name of the last directory created. */
		for (dircnt = 0; dircnt < sindex; dircnt++) {
			if (dircnt == 0)
				sprintf(dirname, "%s/%s.%ld", base_dir, hname,
					gettid());
			else {
				sprintf(tmpdirname, "%s/%ld.%d", dirname,
					gettid(), dircnt);
				sprintf(dirname, "%s", tmpdirname);
			}
			sync();
		}

		dprt("pid[%d]: cd'ing to last created dir: %s\n", gettid(),
		     dirname);

		sindex--;

		/* remove all the ".c" files and makefile in this directory */
		for (filecnt = 0; filecnt < numfiles; filecnt++) {
			sprintf(filename, "%s/%ld.%d.%d.c", dirname, gettid(),
				dircnt - 1, filecnt);
			dprt("pid[%d]: removing file: %s\n", gettid(),
			     filename);

			if (unlink(filename)) {
				dprt("pid[%d]: failed removing file: %s\n",
				     gettid(), filename);
				perror("rm_file_dir(): unlink()");
				free(tmpdirname);
				free(dirname);
				free(filename);
				free(subdir);
				return 1;
			}
			sync();
		}

		sprintf(filename, "%s/%s", dirname, "makefile");
		dprt("pid[%d]: removing %s\n", gettid(), filename);
		if (unlink(filename)) {
			perror
			    ("rm_file_dir() cound not remove makefile unlink()");
			free(tmpdirname);
			free(dirname);
			free(filename);
			free(subdir);
			return 1;
		}
		sync();

		/* the last directory does not have any more sub directories */
		/* nothing to remove.                                    */
		dprt("pid[%d]: in directory count(dircnt): %d\n", gettid(),
		     dircnt);
		dprt("pid[%d]: last directory(numsdir): %d\n", gettid(),
		     numsdir);
		if (dircnt < numsdir) {
			/* remove the sub directory */
			sprintf(subdir, "%s/%ld.%d", dirname, gettid(), dircnt);
			dprt("pid[%d]: removing subdirectory: %s\n", gettid(),
			     subdir);
			if (rmdir(subdir) == -1) {
				perror("rm_file_dir() rmdir()");
				free(tmpdirname);
				free(dirname);
				free(filename);
				free(subdir);
				return 1;
			}
			sync();
		}
	}

	free(tmpdirname);
	free(dirname);
	free(filename);
	free(subdir);
	return 0;
}

/******************************************************************************/
/*								 	      */
/* Function:	crte_mk_rm						      */
/*									      */
/* Description:	This function gets executed by each thread that is created.   */
/*		crte_mk_rm() created the directory tree, polpulates it with   */
/*		".c" files and a makefile that will compile the ".c" files and*/
/*		initiate the makefile in the subdirectory under it. Once the  */
/*		c source files are compiled it will remove them.              */
/*									      */
/* Input:	The argument pointer contains the following.                  */
/*		arg[0] - number of directories to create, depth of the tree.  */
/*		arg[1] - number of ".c" files to create in each dir branch.   */
/*									      */
/* Return:	-1 on failure						      */
/*		 0 on success					              */
/*									      */
/******************************************************************************/
static void *crte_mk_rm(void *args)
{
	int dircnt;		/* index to the number of subdirectories      */
	int fd;			/* file discriptor of the files genetated     */
	int filecnt;		/* index to the number of ".c" files created  */
	int numchar[2];		/* number of characters written to buffer     */
	char *dirname;		/* name of the directory/idirectory tree      */
	char *tmpdirname;	/* name of a temporary directory, for swaping */
	char *cfilename;	/* name of the ".c" file created              */
	char *mkfilename;	/* name of the makefile - which is "makefile" */
	char *hostname;		/* hostname of the client machine             */
	char *prog_buf;		/* buffer containing contents of the ".c" file */
	char *make_buf;		/* buffer the contents of the makefile        */
	char *pwd;		/* contains the current working directory     */
	long *locargptr =	/* local pointer to arguments                 */
	    (long *)args;
	volatile int exit_val = 0;	/* exit value of the pthreads                 */

	if ((dirname = malloc(sizeof(char) * 2048)) == NULL) {	/* just paranoid */
		perror("crte_mk_rm(): dirname malloc()");
		PTHREAD_EXIT(-1);
	}

	if ((tmpdirname = malloc(sizeof(char) * 2048)) == NULL) {
		perror("crte_mk_rm(): tmpdirname malloc()");
		PTHREAD_EXIT(-1);
	}

	if ((cfilename = malloc(sizeof(char) * 2048)) == NULL) {
		perror("crte_mk_rm(): cfilename malloc()");
		PTHREAD_EXIT(-1);
	}

	if ((mkfilename = malloc(sizeof(char) * 2048)) == NULL) {
		perror("crte_mk_rm(): mkfilename malloc()");
		PTHREAD_EXIT(-1);
	}

	if ((prog_buf = malloc(sizeof(char) * 4096)) == NULL) {
		perror("crte_mk_rm(): prog_buf malloc()");
		PTHREAD_EXIT(-1);
	}

	if ((pwd = malloc(PATH_MAX)) == NULL) {
		perror("crte_mk_rm(): pwd malloc()");
		PTHREAD_EXIT(-1);
	}

	if ((hostname = malloc(sizeof(char) * 1024)) == NULL) {
		perror("crte_mk_rm(): hostname malloc()");
		PTHREAD_EXIT(-1);
	}

	if (gethostname(hostname, 255) == -1) {
		perror("crte_mk_rm(): gethostname()");
		PTHREAD_EXIT(-1);
	}
	if (!getcwd(pwd, PATH_MAX)) {
		perror("crte_mk_rm(): getcwd()");
		PTHREAD_EXIT(-1);
	}

	numchar[0] = sprintf(prog_buf,
			     "main()\n{\n\t printf(\"hello world\");\n}\n");

	for (dircnt = 0; dircnt < (int)locargptr[0]; dircnt++) {
		/* First create the base directory, then create the subdirectories   */
		if (dircnt == 0)
			sprintf(dirname, "%s.%ld", hostname, gettid());
		else {
			sprintf(tmpdirname, "%s/%ld.%d", dirname, gettid(),
				dircnt);
			sprintf(dirname, "%s", tmpdirname);
		}
		sync();

		dprt("pid[%d] creating directory: %s\n", gettid(), dirname);
		if (mkdir(dirname, 0777) == -1) {
			perror("crte_mk_rm(): mkdir()");
			PTHREAD_EXIT(-1);
		}
	}

	sync();
	usleep(10);
	for (dircnt = 0; dircnt < (int)locargptr[0]; dircnt++) {
		if (dircnt == 0)
			sprintf(dirname, "%s/%s.%ld", pwd, hostname, gettid());
		else {
			sprintf(tmpdirname, "%s/%ld.%d", dirname, gettid(),
				dircnt);
			sprintf(dirname, "%s", tmpdirname);
		}
		sync();
		if ((make_buf = malloc(sizeof(char) * 4096)) == NULL) {
			perror("crte_mk_rm(): make_buf malloc()");
			PTHREAD_EXIT(-1);
		}
		sprintf(mkfilename, "%s/makefile", dirname);
		{
			/* HACK! I could not write "%.c" to the makefile */
			/* there is probably a correct way to do it      */
			char *dotc = malloc(10);
			dotc = ".c";
			sync();
			usleep(10);
			if (dircnt == (locargptr[0] - 1)) {
				numchar[1] = sprintf(make_buf,
						     "CFLAGS := -O -w -g\n"
						     "SUBDIRS = %ld.%d\n"
						     "SRCS=$(wildcard *.c)\n"
						     "TARGETS=$(patsubst %%%s,\%%,$(SRCS))\n"
						     "all:\t $(TARGETS)\n"
						     "clean:\n"
						     "\trm -f $(TARGETS)\n",
						     gettid(), dircnt + 1,
						     dotc);
			} else {
				numchar[1] = sprintf(make_buf,
						     "CFLAGS := -O -w -g\n"
						     "SUBDIRS = %ld.%d\n"
						     "SRCS=$(wildcard *.c)\n"
						     "TARGETS=$(patsubst %%%s,\%%,$(SRCS))\n\n\n"
						     "all:\t $(TARGETS)\n"
						     "\t@for i in $(SUBDIRS); do $(MAKE) -C $$i ; done\n\n"
						     "clean:\n"
						     "\trm -f $(TARGETS)\n"
						     "\t@for i in $(SUBDIRS); do $(MAKE) -C $$i clean ; done\n",
						     gettid(), dircnt + 1,
						     dotc);
			}
		}

		sync();
		usleep(10);
		dprt("pid[%d]: creating in dir: %s\n", gettid(), mkfilename);
		/* create the makefile, complies .c files and initiates make in   */
		/* subdirectories.                                                */
		if ((fd = open(mkfilename, O_CREAT | O_RDWR,
			       S_IRWXU | S_IRWXG | S_IRWXO)) == -1) {
			dprt(" pid[%d]: failed to create makefile\n", gettid());
			dprt("pid[%d]: failed in directory %s\n", gettid(),
			     dirname);
			perror("crte_mk_rm() failed creating makefile: open()");
			PTHREAD_EXIT(-1);
		} else {
			sync();
			if (write(fd, make_buf, numchar[1]) == -1) {
				perror("crte_mk_rm(): write()");
				PTHREAD_EXIT(-1);
			}

			free(make_buf);

			if (close(fd) == -1) {
				perror("crte_mk_rm(): close()");
				PTHREAD_EXIT(-1);
			}
		}
	}

	for (dircnt = 0; dircnt < (int)locargptr[0]; dircnt++) {
		if (dircnt == 0)
			sprintf(dirname, "%s/%s.%ld", pwd, hostname, gettid());
		else {
			sprintf(tmpdirname, "%s/%ld.%d", dirname, gettid(),
				dircnt);
			sprintf(dirname, "%s", tmpdirname);
		}
		sync();
		/* In each directory create N ".c" files and a makefile. */
		for (filecnt = 0; filecnt < (int)locargptr[1]; filecnt++) {
			sprintf(cfilename, "%s/%ld.%d.%d.c", dirname, gettid(),
				dircnt, filecnt);
			dprt("pid[%d]: creating file: %s\n", gettid(),
			     cfilename);
			if ((fd =
			     open(cfilename, O_CREAT | O_RDWR,
				  S_IRWXU | S_IRWXG | S_IRWXO)) == -1) {
				fprintf(stderr,
					"open() failed to create file %s\n",
					cfilename);
				perror
				    ("crte_mk_rm(): failed creating .c files: open()");
				PTHREAD_EXIT(-1);
			} else {
				sync();
				/* write the code, this program prints hello world */
				if (write(fd, prog_buf, numchar[0]) == -1) {
					perror("crte_mk_rm(): write()");
					PTHREAD_EXIT(-1);
				}

				fsync(fd);

				if (close(fd) == -1) {
					perror("crte_mk_rm(): close()");
					PTHREAD_EXIT(-1);
				}
			}

		}
	}

	if (init_compile(MAKE_EXE, pwd, hostname) == 1) {
		fprintf(stderr, "init_compile() make failed\n");
		PTHREAD_EXIT(-1);
	} else {
		if (init_compile(MAKE_CLEAN, pwd, hostname) == 1) {
			fprintf(stderr, "init_compile() make clean failed\n");
			PTHREAD_EXIT(-1);
		}
	}

	sync();
	/* remove all the files makefiles and subdirecotries  */
	if (rm_file_dir((int)locargptr[0], (int)locargptr[1], hostname, pwd)) {
		fprintf(stderr, "crte_mk_rm(): rm_file_dir() failed\n");
		PTHREAD_EXIT(-1);
	}
	/* if it made it this far exit with success */
	PTHREAD_EXIT(0);
}

/******************************************************************************/
/*								 	      */
/* Function:	main							      */
/*									      */
/* Description:	This is the entry point to the program. This function will    */
/*		parse the input arguments and set the values accordingly. If  */
/*		no arguments (or desired) are provided default values are used*/
/*		refer the usage function for the arguments that this program  */
/*		takes. It also creates the threads which do most of the dirty */
/*		work. If the threads exits with a value '0' the program exits */
/*		with success '0' else it exits with failure '-1'.             */
/*									      */
/* Return:	-1 on failure						      */
/*		 0 on success						      */
/*									      */
/******************************************************************************/
int main(int argc,		/* number of input parameters                 */
	 char **argv)
{				/* pointer to the command line arguments.     */
	int c;			/* command line options                       */
	int num_thrd = MAXT;	/* number of threads to create                */
	int num_dirs = MAXD;	/* number of subdirectories to create         */
	int num_files = MAXF;	/* number of files in each subdirectory      */
	int thrd_ndx;		/* index into the array of thread ids         */
	void *th_status;	/* exit status of LWP's                       */
	pthread_t thrdid[30];	/* maxinum of 30 threads allowed              */
	long chld_args[3];	/* arguments to the thread function           */
	extern int optopt;	/* options to the program                     */

	while ((c = getopt(argc, argv, "d:f:ht:")) != -1) {
		switch (c) {
		case 'd':	/* specify how deep the tree needs to grow    */
			if ((num_dirs = atoi(optarg)) == 0)
				OPT_MISSING(argv[0], optopt);
			else if (num_dirs < 0) {
				fprintf(stdout,
					"WARNING: bad argument. Using default\n");
				num_dirs = MAXD;
			}
			break;
		case 'f':	/* how many ".c" files in each directory.     */
			if ((num_files = atoi(optarg)) == 0)
				OPT_MISSING(argv[0], optopt);
			else if (num_files < 0) {
				fprintf(stdout,
					"WARNING: bad argument. Using default\n");
				num_files = MAXF;
			}
			break;
		case 'h':
			usage(argv[0]);
			break;
		case 't':
			if ((num_thrd = atoi(optarg)) == 0)
				OPT_MISSING(argv[0], optopt);
			else if (num_thrd < 0) {
				fprintf(stdout,
					"WARNING: bad argument. Using default\n");
				num_thrd = MAXT;
			}
			break;
		default:
			usage(argv[0]);
			break;
		}
	}

	chld_args[0] = num_dirs;
	chld_args[1] = num_files;

	for (thrd_ndx = 0; thrd_ndx < num_thrd; thrd_ndx++) {
		if (pthread_create
		    (&thrdid[thrd_ndx], NULL, crte_mk_rm, chld_args)) {
			perror("crte_mk_rm(): pthread_create()");
			exit(-1);
		}
	}

	sync();

	for (thrd_ndx = 0; thrd_ndx < num_thrd; thrd_ndx++) {
		if (pthread_join(thrdid[thrd_ndx], &th_status) != 0) {
			perror("crte_mk_rm(): pthread_join()");
			exit(-1);
		} else {
			dprt("WE ARE HERE %d\n", __LINE__);
			if (th_status == (void *)-1) {
				fprintf(stderr,
					"thread [%ld] - process exited with errors\n",
					thrdid[thrd_ndx]);
				exit(-1);
			}
		}
	}
	return (0);
}
