630007 - Programming Skills-V (OS) [3/3]
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21. Write a script to check whether a given number is...
Shared By : Divya S Didwania (LCIT) Show/Hide Program
21 Write a script to check whether a given number is palindrome or not. ****************************************************************** clear echo "ENTER NUMBER :=" read number rem=0 i=10 revnumber=0 for((;number>0;)) do let revnumber=" revnumber * 10 " let rem=" number % 10 " let number=" number / 10 " let revnumber=" revnumber + rem " done echo -e "\nREVERSE NUMBER :-\c" & echo $revnumber ~ ~ ~ ~ ~ ENTER NUMBER :=\c 435621 REVERSE NUMBER :-126534 [divya@linux ~]$ ****************************************************************** Shared By : Your Name (College - Place ) Show/Hide Program
Share this program... Send it to gtumca@gmail.com with your Name - College name.. and share what you want ... at same mail id... Thanx in advance... Be connected... D_i_Z 22. Write a script to display all words of a file in ascending order.
Shared By : Divya S Didwania (LCIT) Show/Hide Program
22.Write a script to display all words of a file in ascending order. ****************************************************************** echo " Enter File Name" read fname sort $fname or echo -e "\n enter File name " read fn for i in `cat $fn` do echo $i >> f2.txt done sort f2.txt rm f2.txt ~ ~ [divya@linux ~]$ cat > f1 z x y w n h t r u a b c [11]+ Stopped cat > f1 [divya@linux ~]$ sh 22.sh enter File name f1 a b c h n r t u w x y z Shared By : Your Name (College - Place ) Show/Hide Program
Share this program... Send it to gtumca@gmail.com with your Name - College name.. and share what you want ... at same mail id... Thanx in advance... Be connected... D_i_Z 23. Write a script to display all lines of a file in ascending order.
Shared By : Hetal Modi (CTI- Gandhinagar) Show/Hide Program
23. Write a script to display all lines of a file in ascending order. echo " Enter File Name" read fname sort $fname /* output [mca0914@ctilinux-1 mca0914]$ sh 23.sh Enter File Name second.txt 1 10 2 4 40 5 8 */ 24. Write a script to display the last modified file.
Shared By : Rushyang Darji (SVIT -Vasad ) Show/Hide Program
#!/usr/bin/env bash # GTU24: Write a script to display the last modified file. # Code written By: Rushyang Darji # Visit My Online Repository: "http://github.com/rushyang/GTU-OS-Bash-Scripts" for regular updates and more scripts. # Final Build: 19.10.2010 while true; do # -e enables readline, which means you can use tab-completion. & -p prints whatever's written in "" before taking the path # The ''|| exit'' makes the script exit if read returns false, which it # will if the user hits Ctrl+C amongst other. read -e -p "Enter Directory: " path || exit # if path contains an existing directory, break out of this infinite loop. [[ -d $path ]] && break echo "Invalid Path, Try Again!" done cd $path # cd $path is inevitable because of * in use of ls. ls * -dpltr | grep -v '/$' | tail -n1 # Here, observe '*' after ls. You must specify a wildcard pattern for indicating all files first. # This is because the -d option specifies that only directory names should listed. # Moreover, -p puts an indicator at the end of "directories", which will be stripped by grep inverse. # Once we have neglected directories, we can list(-l) "ONLY FILES" from current working directory sorted by it's modified time (-t) in reverse order (-r). The most last one will be fetched by tail. cd $OLDPWD # OLDPWD is the env var, which always remembers our "PREVIOUS WORKING DIRECTORY". Enter `env | grep OLDPWD` to see it. # 'cd -' will also lead us into last working directory. But then also we don't need to print it on Terminal while executing it. 25. Write a shell script to add the statement #include ...
Shared By : Rushyang Darji (SVIT -Vasad ) Show/Hide Program
#!/usr/bin/env bash # Code written By: Rushyang Darji # Visit My Online Repository: "http://github.com/rushyang/GTU-OS-Bash-Scripts" for regular updates and more scripts. # Final Build: 02.10.2010 while true; do read -e -p "Enter Directory: " path || exit [[ -d $path ]] && break echo "Invalid path! Try Again!" done path=${path%/} myargs=`grep -l -e "printf" -e "fprintf" $path/*.c | xargs` if [ $? -gt 1 ]; then # grep exits with status 1 when no matches were found. echo -n "No Matches were found. " && exit fi temp=$(mktemp tmp.XXXXXXXXX) for i in $myargs # Here, grep has the exit status 0. do echo "Do you want to add '#include ' to $i?" read S case $S in Y|y|YES|Yes|yes|yeah) sed '1i\ #include' "$i" > "$temp" # i for insertion, 1 for 1st line. $i is the file to insert. and all output will be redirected to $temp mv "$temp" "$i" # renaming $temp by over writing to $i ;; n|N|NO|no|No|nope) echo "Alright! Next.." shift ;; *) echo "Invalid input." ;; esac done if [ -z $myargs ]; then echo "No Matches were found. Try another Directory" else clear head -n5 $path/*.c | less fi rm $temp ######################## OR ######################## #!/usr/bin/env bash # GTU25: Write a shell script to add the statement #include at the beginning of every C source file in current directory containing printf and fprintf. # Code written By: Rushyang Darji # Visit My Online Repository: "http://github.com/rushyang/GTU-OS-Bash-Scripts" for regular updates and more scripts. # Final Build: 19.08.2010 # If you want to rename and include all ".C" files too, Refer GTU26.sh myargs=`grep -l -e "printf" -e "fprintf" *.c | xargs` if [ $? -gt 1 ]; then # grep has exit status 1 when no matches were found. echo -n "No Appropriate Matches were found. " fi for i in $myargs # Here, grep has the exit status 0. do echo "Do you want to add '#include ' to $i?" read S case $S in Y|y|YES|Yes|yes|yeah) sed '1i\ #include' "$i" > $$ # i for insertion, 1 for 1st line. $i is the file to insert. and all output will be redirected to $$ (or you can say temp... Actually $$ returns terminal id. but when output is directed to it, a file is made) mv $$ $i # renaming $$ by over writing to $i ;; n|N|NO|no|No|nope) echo "Alright!" shift ;; *) ;; esac done if [ -z $myargs ]; then echo "No Matches were found. Try another Directory" else clear head -n5 *.c | less fi 26. Write a script that behaves both in interactive and...
Shared By : Rushyang Darji (SVIT -Vasad ) Show/Hide Program
# !/usr/bin/env bash Rushyang Darji (SVIT -Vasad ) # 26. Interactive - non-interactive shell script to prompt and delete c files within the given or predefined current directory. # # Code Developed By: Rushyang Darji # Init. Build: 06.08.2010 # Last Build: 19.10.2010 N=$# ext=c if test "$N" -eq "0"; then while true; do # Same inifinite loop as we used in GTU24 read -e -p "Enter Path: " path || exit [[ -d $path ]] && break echo "Invalid Path, Try Again!" done path=${path%/} # Removes last / from the end of the path. Though, it's not compulsion to do so because /foo/bar and /foo//////bar is considered exactly the same! for i in $path/*.C do if [ "$i" != $path/'*.C' ]; then # If there is no match, Value of i will be ''$path/*.C''. & That's why there is no need to rename. mv "$i" "${i/.C/}".c # Renames every .C files to .c, so that we can use it afterwards in same loop. clear fi done for i in $path/*."$ext" do if [ "$i" != "$path"/'*.c' ]; then # If there is no ".C FILE" exist in that directory, it will switch to else. clear echo "File is $i" head -n10 "$i" | nl # head for displaying First 10 lines, nl for numbering them on terminal. sleep 1 # Halt for 1 second rm -i "$i" # -i for interactive prompt. # Remember, "" around $i is super necessary! Because except it, you'll get an error with filenames containing spaces. else echo "There are no matching \"C\" files to Prompt in this directory." sleep 2 clear=no fi done if test "$clear" != "no"; then # If clear=no then there are no C Files to display. clear echo "Remaining C files in the Directory..." ls -1 $path/*.c # 1 result per line (-1) fi else # Else part contains, where user passes the name of C files, which should exist in the current working directory as the parameter. for i in $path/*.C do if [ "$i" != $path/'*.C' ]; then # if There are no matches ie if there is no C file in given dir, 'i' will be ''$path/*.C'' mv "$i" "${i/.C/}".c # Renames every .C files to .c clear fi done for i in $* # When filenames are passed as parameters. do clear i="${i/.c/}" # Removes an extension from file variable 'i' Only in the case of extension is also passed within the filename parameter. i="$(pwd)/$i.c" # Makes i the complete path of a file, including extension.. # Last two lines are necessary because user, may and may not enter filename including extension. if [ -f "$i" ]; then # Checks for the existence of given filename, into pwd echo "File name is $i" head -n10 "$i" | nl sleep 1 rm -i "$i" else # Error for non-Existent files. echo "There is no such a file with name: \"$i\" in current working directoy" sleep 3 fi done clear echo "Remaining C files in the Directory..." ls -1 *.c sleep 1 fi 27. Write a script that deletes all leading and trailing spaces...
Shared By : Your Name (College - Place ) Show/Hide Program
Share this program... Send it to gtumca@gmail.com with your Name - College name.. and share what you want ... at same mail id... Thanx in advance... Be connected... D_i_Z 
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