Visit Our UNIX and Linux User Community


Directories having spaces


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Directories having spaces
# 8  
Old 05-06-2016
Quote:
Originally Posted by Corona688
That is a zsh variation on dangerous use of backticks and should be avoided.

[edit] Come to think of it, I'd be surprised if it split on lines rather than whitespace either.

In short, whenever the idea is "cram entire file or stream into single variable, then process one by one", you can leave out the 'cram entire file into variable' part and still process one by one with far less danger of hitting the maximum size of variables or process memory.
I had a look at that page and I think there is a mistake there in the sense that ARG_MAX is related to the arguments passed to a new process, which does not apply in the case of a for loop.

There is of course a "danger" (if you want to call it that) of unintended field splitting, so the construct is still wrong (unless it is zsh apparently), but not for the reason mentioned on that page...

Last edited by Scrutinizer; 05-06-2016 at 04:19 PM..
# 9  
Old 05-06-2016
Works fine in posix shells: dash, ksh, zsh, bash, ...
Code:
# this solution no problem even input lines include some special chars, $IFS chars and so on.
while read file
do
    first_line=$(head -1 "$file")   # or use read
    echo "$file , $first_line" >> header_info.txt
done < list_file.txt >> header_info.txt


Previous Thread | Next Thread
Test Your Knowledge in Computers #277
Difficulty: Easy
Solaris is a version of UNIX System V Release 4 (SVR4), jointly developed by Sun and AT&T, and was licensed by Sun from DEC to replace SunOS.
True or False?

9 More Discussions You Might Find Interesting

1. Solaris

Giving read write permission to user for specific directories and sub directories.

I have searched this quite a long time but couldn't find the right method for me to use. I need to assign read write permission to the user for specific directories and it's sub directories and files. I do not want to use ACL. This is for Solaris. Please help. (1 Reply)
Discussion started by: blinkingdan
1 Replies

2. Shell Programming and Scripting

Directories with spaces

My code path=`find /root/folder/ -maxdepth 100 -type d | sort --random-sort | head -1` if this returns a directory with spaces in for instance: /root/folder/this is a folder is there a way to replace the value of path with the same value but with the spaces replaced so its... (2 Replies)
Discussion started by: digitalviking
2 Replies

3. Shell Programming and Scripting

find -exec directories with spaces

All, I have a cleanup script that removes directories and all contents underneath, but I am having issues with directories with spaces. This is the command I am currently running, how can I get it to work with directories with spaces? find /path -mindepth 3 -type d -exec rm -rf {} \; (29 Replies)
Discussion started by: markdjones82
29 Replies

4. Shell Programming and Scripting

Removing blank spaces, tab spaces from file

Hello All, I am trying to remove all tabspaces and all blankspaces from my file using sed & awk, but not getting proper code. Please help me out. My file is like this (<b> means one blank space, <t> means one tab space)- $ cat file NARESH<b><b><b>KUMAR<t><t>PRADHAN... (3 Replies)
Discussion started by: NARESH1302
3 Replies

5. Shell Programming and Scripting

Script to find folders with spaces and end of files and directories

Hi I need a script that can search through a set of directories and can locate any file or directory that has a space at the end Filename(space) Foldername(space) I then need to remove that space within the script Hope someone can help thanks in advance Treds (8 Replies)
Discussion started by: treds
8 Replies

6. Shell Programming and Scripting

find & dirname:problems with white spaces in Directories

Hi all, my problem: (little extract from my bash-script) I want to move each file (.mov) from one directory (and many Subdirectories) to another directory (only one); after moving i want to create hardlinks to the old directories. Thatīs no problem, but now: source-directories... (4 Replies)
Discussion started by: tubian
4 Replies

7. UNIX for Dummies Questions & Answers

how to append spaces(say 10 spaces) at the end of each line based on the length of th

Hi, I have a problem where I need to append few spaces(say 10 spaces) for each line in a file whose length is say(100 chars) and others leave as it is. I tried to find the length of each line and then if the length is say 100 chars then tried to write those lines into another file and use a sed... (17 Replies)
Discussion started by: prathima
17 Replies

8. Shell Programming and Scripting

Directories with spaces in name - looking for help with questions in that issue

I need to work with 'nice' directory names which have some spaces in name, and that brings some questions and not-understanding. Would some expert help me out how to deal with that?! My task is to document some processing, running from some script. I do need to have spaces in directories... (2 Replies)
Discussion started by: alex_5161
2 Replies

9. Shell Programming and Scripting

Strip leading and trailing spaces only in a shell variable with embedded spaces

I am trying to strip all leading and trailing spaces of a shell variable using either awk or sed or any other utility, however unscuccessful and need your help. echo $SH_VAR | command_line Syntax. The SH_VAR contains embedded spaces which needs to be preserved. I need only for the leading and... (6 Replies)
Discussion started by: jerardfjay
6 Replies

Featured Tech Videos