Solved

testing file types with if statement

Posted on 2002-03-16
4
155 Views
Last Modified: 2010-04-22
Hi all, I want to know how to test if a file is a text file or any other type in a "if" statement (In a shell script) ?
ex: if [ test.wkr is text ] then do....
0
Comment
Question by:mabell
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 4

Expert Comment

by:ct.smith
ID: 6873561
This sort of thing, if available, will be specific to the API you're using.  Most languages don't offer anything beyond opening a file as text or binary, which is decided at compile time.

Anyways, you migth have some luck if you look for references to handling or discovering mime types in whatever API/library/language you're using.
0
 
LVL 51

Accepted Solution

by:
ahoffmann earned 100 total points
ID: 6873984
man test will give you all the answers, the usage of this test depends on your shell (mainly csh vs. sh variants), for example to test a pipe:

   if [ -p file ] then echo is PIPE

If you menan something like "content is word .doc" format vs. "content is plain ASCII" format, use the file command: man file
(keep in mind that the result of the file command highly depends on the quality of your /etc/magic file.
0
 

Author Comment

by:mabell
ID: 6876967
Ok thx :)
I do this (to test if a file is a text file) :
fileTest=$(file $1/$2|awk '{printf $3}')
if [ $fileTest = "text," ]
then
...

were $1 is a directory and $2 is a file passed in parameters
0
 
LVL 51

Expert Comment

by:ahoffmann
ID: 6877950
oops, take care with
     file $1/$2|awk '{printf $3}'
it may produce fals positives, for example see:
     awk '($5 == "text"){print}' /etc/magic
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
How to import linux vhd to sccvmm 1 167
How do I delete this file in Linux 2 461
Problem to command 8 103
App holding yum lock unable to update my rpm package 1 112
Have you ever been frustrated by having to click seven times in order to retrieve a small bit of information from the web, always the same seven clicks, scrolling down and down until you reach your target? When you know the benefits of the command l…
The purpose of this article is to fix the unknown display problem in Linux Mint operating system. After installing the OS if you see Display monitor is not recognized then we can install "MESA" utilities to fix this problem or we can install additio…
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an antispam), the admini…
Finding and deleting duplicate (picture) files can be a time consuming task. My wife and I, our three kids and their families all share one dilemma: Managing our pictures. Between desktops, laptops, phones, tablets, and cameras; over the last decade…
Suggested Courses

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question