Shell Script

**** Note: all scripts must be written in sh (/bin/sh) in FreeBSD system ****

1-1)(10%)Write a script that prints the required lines of the following commands'
         results. Only print the lines which contains "current user".

    a. fstat
    b. sockstat
    c. last
    d. ps aux
    e. cat /etc/passwd

   requirement:

    a. Complete all five commands in the script called "hw3_1_1.sh"

   example :

   In jayson12's FreeBSD system, he got the following results after he did the
   five commands separately.
    % who
      jayson12         ttyp0    Oct  9 07:18 (jayson12)

    % fstat; sockstat; last; ps aux ; cat /etc/passwd
      
      jayson12 sshd       42364    7 /dev         95 crw-rw-rw-   ptyp1 rw
      jayson12 sshd       42364    8 /dev         95 crw-rw-rw-   ptyp1 rw
      jayson12 sshd       42364    9 /dev         95 crw-rw-rw-   ptyp1 rw
      root     sshd       42361 root /             2 drwxr-xr-x     512  r
      root     sshd       42361   wd /             2 drwxr-xr-x     512  r
      root     sshd       42361 text /        238534 -r-xr-xr-x  194032  r

      jayson12 sshd       40143 4  stream -> ??
      root     sshd       40140 3  tcp4   140.113.235.152:22 140.113.235.151:46444
      root     sshd       40140 5  stream -> ??
      smmsp    sendmail   636   3  dgram  -> /var/run/log
      root     sendmail   630   3  dgram  -> /var/run/logpriv
      root     sendmail   630   4  tcp4   127.0.0.1:25          *:*

      jayson12         ttyp0    linux1           10 22 15:52   still      logged in
      sysadm           ftp      localhost        10 14 14:49 - 14:49      (00:00)
      jayson12         ftp      localhost        10 14 14:49 - 14:49      (00:00)
      ftp              ftp      nat235.dynamic.  10 14 14:39 - 14:40      (01:11)
      sysadm           ftp      localhost        10 14 14:23 - 14:23      (00:00)
      jayson12         ftp      localhost        10 14 14:22 - 14:22      (00:00)
      sysadm           ftp      localhost        10 14 14:06 - 14:06      (00:00)

      smmsp      636  0.0  0.4  5848  2148  ??  Is    61008    0:01.57   sendmail: Queue runner@00:30:00 for /var/spool/clientmqueue (sendmail)
      root       642  0.0  0.2  3184   956  ??  Ss    61008    0:13.15   /usr/sbin/cron -s
      root       658  0.0  0.1  3240   696  ??  Is    61008    0:00.00   /usr/sbin/moused -p /dev/psm0 -t auto
      root     40140  0.0  0.6  8384  2908  ??  Is    3:52     0:00.09   sshd: jayson12 [priv] (sshd)
      jayson12 40143  0.0  0.6  8384  2916  ??  I     3:52     0:00.19   sshd: jayson12@ttyp0 (sshd)
      root     42361  0.0  0.6  8384  2976  ??  Is    8:59     0:00.08   sshd: jayson12 [priv] (sshd)
      jayson12 42364  0.0  0.6  8384  2968  ??  S     8:59     0:00.58   sshd: jayson12@ttyp1 (sshd)
      root       703  0.0  0.1  3156   744  v0  Is+   61008    0:00.00   /usr/libexec/getty Pc ttyv0

      root:*:0:0:Charlie &:/root:/bin/csh
      www:*:80:80:World Wide Web Owner:/nonexistent:/usr/sbin/nologin
      ftp:*:1002:1002:I am ftp:/home/ftp:/usr/sbin/nologin
      jayson12:*:1001:0:limc:/home/jayson12:/bin/tcsh
      sysadm:*:1003:1003:User &:/home/sysadm:/bin/tcsh

    When he ran his shell script hw3_1_1.sh, he got the following. (Notice the
    difference between running with and without sudo.)

    % ./hw3_1_1.sh

      jayson12 sshd       42364    7 /dev         95 crw-rw-rw-   ptyp1 rw
      jayson12 sshd       42364    8 /dev         95 crw-rw-rw-   ptyp1 rw
      jayson12 sshd       42364    9 /dev         95 crw-rw-rw-   ptyp1 rw
      jayson12 sshd       40143 4  stream -> ??
      jayson12         ttyp0    linux1           10 22 15:52   still  logged in
      jayson12         ftp      localhost        10 14 14:49 - 14:49   (00:00)
      jayson12         ftp      localhost        10 14 14:22 - 14:22   (00:00)
      root     40140  0.0  0.6  8384  2908  ??  Is    3:52  0:00.09   sshd: jayson12 [priv] (sshd)
      jayson12 40143  0.0  0.6  8384  2916  ??  I     3:52  0:00.19   sshd: jayson12@ttyp0 (sshd)
      root     42361  0.0  0.6  8384  2976  ??  Is    8:59  0:00.08   sshd: jayson12 [priv] (sshd)
      jayson12 42364  0.0  0.6  8384  2968  ??  S     8:59  0:00.58   sshd: jayson12@ttyp1 (sshd)
      jayson12:*:1001:0:limc:/home/jayson12:/bin/tcsh
    
    % sudo ./hw3_1_1.sh

      root     sshd       42361 root /             2 drwxr-xr-x     512  r
      root     sshd       42361   wd /             2 drwxr-xr-x     512  r
      root     sshd       42361 text /        238534 -r-xr-xr-x  194032  r
      root     sshd       40140 3  tcp4   140.113.235.152:22 140.113.235.151:46444
      root     sshd       40140 5  stream -> ?? 
      root     sendmail   630   3  dgram  ->/var/run/logpriv
      root     sendmail   630   4  tcp4   127.0.0.1:25  *:*
      root       642  0.0  0.2  3184   956  ??  Ss    61008    0:13.15      /usr/sbin/cron -s
      root       658  0.0  0.1  3240   696  ??  Is    61008    0:00.00      /usr/sbin/moused -p /dev/psm0 -t auto
      root     40140  0.0  0.6  8384  2908  ??  Is    3:52     0:00.09      sshd: jayson12 [priv] (sshd)
      root     42361  0.0  0.6  8384  2976  ??  Is    8:59     0:00.08      sshd: jayson12 [priv] (sshd)
      root       703  0.0  0.1  3156   744  v0  Is+   61008    0:00.00      /usr/libexec/getty Pc ttyv0
      root:*:0:0:Charlie &:/root:/bin/csh

    %

    hint: grep $USER

1-2)(20%)Print the sum of files' size in current directory(not including

    subdirectories). Also, find out the largest and the smallest files, and print
    
    their filenames, filesizes and owners.

  Example:

  % ls -l
   drw-r--r--  2 otaku akiba     512 2007-04-25 10:48 GUNPLA
   -rw-r--r--  1 otaku akiba     104 2007-05-20 08:55 test_a
   -rw-r--r--  1 otaku akiba     104 2007-09-15 08:32 mymailpasswd
   -rw-r--r--  1 otaku akiba   12354 2007-08-03 14:58 get_jpg.sh
   drw-r--r--  2 otaku akiba     512 2007-11-25 12:03 GUNDAM_animation

  % ./hw3_1_2.sh
   13586
   file: mymailpasswd 104 owner: otaku
   file: get_jpg.sh 12354 owner: otaku

  %

  Requirements:
   
   a. All commands in your script should be concatenated by "|"(pipe) in one line.
      Put this line in the file called "hw3_1_2.sh"
   b. Any temporary file is not allowed to be created by your script.
   c. If the number of the largest or the smallest was more than one, choose the
      last one.If there are more than one largest file or smallest file, print
	  the last one you processed.

   hint:

       awk sed xargs bc 
   
2)(30%)Change filename extension 

  Change all files' filename extension at a specific directory, including subdirectories.

  Example:

  % cd /tmp
  % ls -l
   -rw-r--r--  1 test  wheel    0 Oct 19 15:56 1.test
   -rw-r--r--  1 test  wheel    0 Oct 19 15:56 2.test
   -rw-r--r--  1 test  wheel    0 Oct 19 15:56 3.test
   -rw-r--r--  1 test  wheel    0 Oct 19 15:56 4.test
   -rw-r--r--  1 test  wheel    0 Oct 19 15:56 5.test
   drwxr-xr-x  2 test  wheel  512 Oct 19 22:49 kerker

  % cd kerker
  % ls -l
   -rw-r--r--  1 test  wheel    0 Oct 19 15:56 10.test
   -rw-r--r--  1 test  wheel    0 Oct 19 15:56 6.test
   -rw-r--r--  1 test  wheel    0 Oct 19 15:56 7.test
   -rw-r--r--  1 test  wheel    0 Oct 19 15:56 8.test
   -rw-r--r--  1 test  wheel    0 Oct 19 15:56 9.test

  % cd /home/test/
  % ./hw3_2.sh -d /tmp -f test -t xxx
  % pwd
   /home/test/

  % cd /tmp/
  % ls -l
   -rw-r--r--  1 test  wheel    0 Oct 19 15:56 1.xxx
   -rw-r--r--  1 test  wheel    0 Oct 19 15:56 2.xxx
   -rw-r--r--  1 test  wheel    0 Oct 19 15:56 3.xxx
   -rw-r--r--  1 test  wheel    0 Oct 19 15:56 4.xxx
   -rw-r--r--  1 test  wheel    0 Oct 19 15:56 5.xxx
   drwxr-xr-x  2 test  wheel  512 Oct 19 22:49 kerker

  % cd kerker/
  % ls -l
   -rw-r--r--  1 test  wheel    0 Oct 19 15:56 10.xxx
   -rw-r--r--  1 test  wheel    0 Oct 19 15:56 6.xxx
   -rw-r--r--  1 test  wheel    0 Oct 19 15:56 7.xxx
   -rw-r--r--  1 test  wheel    0 Oct 19 15:56 8.xxx
   -rw-r--r--  1 test  wheel    0 Oct 19 15:56 9.xxx 

  %

  requirement:

   a. All codes should be in the file called "hw3_2.sh".

   b. Input format :

       -d: the target directory when running your program

       -f: the filename extension that should be replaced by the string follow "-t"

       -t: the filenmae extension that you use want to replace the original
     	   filename extension -f specified

      PS:

         ./hw3_2.sh -d /tmp -f test -t xxx
         ./hw3_2.sh -t xxx  -d /tmp -f test 
         ./hw3_2.sh -f test -t xxx  -d /tmp

         These don't have any differences. 

   c. Any temporary file is not allowed to be created by your script.

3) (40%)Use the tool dialog(1) to create required graphical user interface
   (GUI) program. Your program must contain the items listed below:

   GUI lists:

   a. Center GUI:

       Control all GUIs. It has some options as following:

      Options list:

		Wikipedia: If you choose this option, it will invoke the Wiki GUI.

		Dictionary:If you choose this option, it will invoke the Dict GUI.

		Exit: If you choose this option, it will shutdown this Center GUI.
                    
   b. Wiki GUI:
       
       Read the input string. 

       Search the string from http://wikipedia.org/, and show the result web pages.

       (hint: just use "w3m" or other text web browsers)

       When Wiki GUI shutdown, it will return to Center GUI.

   c. Dict GUI:
    
       Read the input string.
       
       connect to google dictionary, look up the string, and finally show the data on the Data GUI. 

       http://www.google.com.tw/dictionary?hl=en
   
   d. Data GUI:

       Show the data coming from the google dictionary.

       (just show the first definition or the shortest definition)

       When Data GUI shutdown, it will return to Center GUI.

   hint:
      
     a.  /usr/share/examples/dialog

     b.  fetch(1) www/w3m-m17n ftp/wget www/lynx www/link

   Bonus:
   
     a. Merge the Dict GUI and the Data GUI into one called merged GUI. The merged GUI must have
        
	    an option to go back to the Center GUI. 

     b. Add new options in Center GUI with other services.