Sponsored Content
Full Discussion: File operator command
Top Forums Shell Programming and Scripting File operator command Post 302946760 by Peasant on Friday 12th of June 2015 12:49:57 AM
Old 06-12-2015
Thank you Don for further explanation, but the OP asked about -n operator specifically which is covered in man test.

He did not specify shell or operating system to make further assumptions.

Regards
Peasant.
 

10 More Discussions You Might Find Interesting

1. Programming

new operator

Hi, Please clear the 2 questions, 2 Questions, 1) Why the new as a operator? Is there any special reason why it can't be a function like malloc? 2) How are we considering sizeof(),new are as a opearartors? I know + - * / -> , . etc.. are operators, which criteria satisfied by sizeof()... (4 Replies)
Discussion started by: Nagapandi
4 Replies

2. UNIX for Dummies Questions & Answers

File already exists error while using '>' operator

hi i am using the below code grep -v '^$' file1.lst >file1.lst but it gives file1.lst already exists. And i want to over rite on the same file Whats the work around? (5 Replies)
Discussion started by: jathin12
5 Replies

3. Shell Programming and Scripting

Checking if file exists using a NOT operator and shell variable

Hi, I'm new to UNIX, at least shell programming and am having trouble figuring out a problem i'm having. In one section in my nested if statement, i want the program to test if the file does not exist, based on an argument supplied at the command line by the user. What i have is elif ; then... (3 Replies)
Discussion started by: rowlf
3 Replies

4. Shell Programming and Scripting

FIle (directory) test operator (bash)

I'm almost pulling out my hair trying to figure out what's wrong with this... there's no reason I can see that it shouldn't be working. It seems that the code acts as though the conditional statement is true no matter what - I've even tried removing the negation operator, but it always goes into... (5 Replies)
Discussion started by: wildbluefaerie
5 Replies

5. Shell Programming and Scripting

How can I use a pipe operator in a variable: OPTION="| command"?

I have a string of commands I am piping some data through and I want to allow command line switches to select which commands are used. I want to do something like this: OPTION="| command3" command1 -a -b c.txt | command2 -d -e $OPTION >result.txt I want to do it that way because OPTION may be... (1 Reply)
Discussion started by: KenJackson
1 Replies

6. UNIX for Dummies Questions & Answers

su with << operator

All, THe below is my script , when i use this i am getting nothing . could any one help me to know what is the use of the << operator below su - $8 << supo echo "exportsph $2 $1 $3 $4" exportsph $2 $1 $3 $4 supo i also tried as individual command su - userid << supo , when i do... (3 Replies)
Discussion started by: arunkumar_mca
3 Replies

7. UNIX for Dummies Questions & Answers

+= operator

im new to bash scripting and im just using online tutorials and trial and error. i wanted to write a script to read numbers from a file and find their sum: #!/bin/bash theSum=0 for line in $(cat numbers.txt) do let "theSum = theSum + $line" echo "$line" done echo "The sum is... (3 Replies)
Discussion started by: astrolux444
3 Replies

8. Shell Programming and Scripting

Problem in test file operator on a ufsdump archive file mount nfs

Hi, I would like to ask if someone know how to test a files if exist the file is a nfs mount ufsdump archive file.. i used the test operator -f -a h almost all test operator but i failed file1=ufs_root_image.dump || echo "files doesn't exist && exit 1 the false file1 is working but... (0 Replies)
Discussion started by: jao_madn
0 Replies

9. Shell Programming and Scripting

perl's substitution operator "s" with file contents?

Please show me how to make substitution over the contents of a file in a perl script. In a perl script, the core part of substitution operation is s/FINDPATTERN/REPLACEPATTERN/g; However, I cannot figure out how to make the substitution occur over the contents of a file. The following... (3 Replies)
Discussion started by: LessNux
3 Replies

10. Shell Programming and Scripting

How to use pipe operator as simple character in text file?

Hello all, I have two files which are cmd and disk. `$cat cmd lsdev | grep -iw` `$cat disk hdisk2` Now I want to use the contents of both the files in a way such that `lsdev | grep -iw` command works for hdisk2 when I write the following script: `!#/bin/sh cmd1="$( sed -n... (4 Replies)
Discussion started by: ravi.trivedi
4 Replies
CHOPTEST(8C)															      CHOPTEST(8C)

NAME
choptest - HylaFAX page chopping test program SYNOPSIS
/usr/sbin/choptest [ options ] input.tif DESCRIPTION
choptest is a program for testing the page chopping support in the HylaFAX software (specifically, in the faxq(8C) program). choptest ana- lyzes a TIFF/F (TIFF Class F) file with 1-D MH- or 2-D MR-encoded data and reports what the automatic page chopping logic would do if the file were submitted for transmission. Options are provided for controlling whether choptest checks the last page or all pages of the docu- ment, and what whitespace threshold to use in deciding if a page should be chopped. OPTIONS
-a Chop all pages in the document. This is equivalent to setting the PageChop configuration parameter to ``all''; c.f. hylafax- config(5F). By default only the last page of the document is considered. -t inches Set the minimum whitespace threshold that must be present on a page for it to be chopped. This is equivalent to the Page- ChopThreshold configuration parameter; c.f. hylafax-config(5F). By default choptest requires that at least 3 inches of trailing whitespace be present. EXAMPLES
The following shows a multi-page, high-resolution document. Each page has insufficient whitespace for it to be chopped. hyla% ./choptest -a ~/tiff/pics/faxix.tif Chop pages with >=3" of white space at the bottom. Don't chop, found 67 rows, need 588 rows Don't chop, found 67 rows, need 588 rows Don't chop, found 67 rows, need 588 rows Don't chop, found 53 rows, need 588 rows Don't chop, found 91 rows, need 588 rows Don't chop, found 99 rows, need 588 rows Don't chop, found 47 rows, need 588 rows SEE ALSO
faxq(8C), hylafax-config(5F) October 3, 1995 CHOPTEST(8C)
All times are GMT -4. The time now is 11:24 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy