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Full Discussion: Shell script to find file type
Homework and Emergencies Homework & Coursework Questions Shell script to find file type Post 302925366 by kwatt019 on Sunday 16th of November 2014 09:18:30 PM
Old 11-16-2014
Shell script to find file type
1. The problem statement, all variables and given/known data:
Write a shell script that takes a single command line parameter, a file path (might be relative or absolute). The script should examine that file and print a single line consisting of the phrase:
Windows ASCII
if the files is an ASCII text file with CR/LF line terminators, or
Something else
if the file is binary or ASCII with “Unix” LF line terminators.


2. Relevant commands, code, scripts, algorithms:

Output should look like this:
./fileType.sh ~cs252/Assignments/ftpAsst/d3.dat
Windows ASCII
./fileType.sh /bin/cat
Something else
./fileType.sh fileType.sh
Something else
./fileType.sh /usr/share/dict/words
Something else

3. The attempts at a solution (include all code and scripts):
The first attempt I tried worked on files, but when I ran it on folders it outputted Windows ASCII. The second attempt I tried works, but only outputs Windows ASCII.
Code:
#!/bin/sh 
file=$1 
if grep -q "\r\n" $file;then 
echo Windows ASCII 
else 
echo Something else 
fi

and I have tried this:
Code:
#!/bin/sh
if test -f $file;
then
echo "Windows ASCII"
else
echo "Something else"
fi

Third attempt.
Code:
#!/bin/sh
file=$1
case $(file $file) in
*"ASCII test, with CRLF lin terminators")
echo "Windows ASCII"
;;
*)
echo "Something else"
;;
esac



4. Complete Name of School (University), City (State), Country, Name of Professor, and Course Number (Link to Course):
Old Dominion University, Norfolk VA USA, Professor Steven Zeil, CS 252

Note: Without school/professor/course information, you will be banned if you post here! You must complete the entire template (not just parts of it).
Last edited by kwatt019; 11-17-2014 at 12:27 AM.. Reason: added third attempt.
 

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LEARN ABOUT OPENSOLARIS

script

script(1)							   User Commands							 script(1)

NAME

       script - make record of a terminal session

SYNOPSIS

       script [-a] [filename]

DESCRIPTION

       The  script  utility  makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
       record is saved in the file typescript. See WARNINGS.

       The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
       when the forked shell exits or when Control-d is typed.

OPTIONS

       The following option is supported:

       -a    Appends the session record to filename, rather than overwriting it.

NOTES

       script places everything that appears on the screen in filename, including prompts.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

WARNINGS

       script  can  pose  a  security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
       privileged user, that is, root. Be sure that typescript is not a link before running script.

SunOS 5.11							    30 Jan 2004 							 script(1)
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