Interesting. The standards don't include the -print0 primary for find nor the -0 option for xargs. But, in a directory with the following files:
The following session using ksh on Mac OS X:
shows the behavior required by the standards when -print0 and -0 are not used (i.e., no files read by xargs from stdin; no invocations of the specified command). I don't see any reason why the behavior should be different when those options are used; and, at least on Mac OS X, the behavior is the same.
Hello friends,
I am compiling some set of SQL scripts in a set of sub directories demoed as below. After compiling log files are being created.
Each and every time after compiling time I had to go subdir by subdir to delete the log files. I am sure there should be simple way to look for all log... (4 Replies)
Hi,
I have a shell script to find files older than 'X' days ($2) in directory path ($1) and delete them.
Like this:
my_file_remover.sh /usr/home/c 90
Now, I need to modify this script and add it in CRON, so that it checks other directories also.
Like:
my_file_remover.sh /usr/home/c... (3 Replies)
Hi,
I am trying to write a script that will use ls on a directory and list the files one at a time and their size. If the size is 0 i want it to ask me if I want to delete it (yes or no). If I say yes, I want it to delete but it won't know what the file name is just from running from the script.... (2 Replies)
Can any one please help me in deleting all the Files over 7 days from sub-directories A, B, C...
Top-Directory
Sub-Directory-A
File-1
File-2
.....
File-n
Sub-Directory-B
File-1
File-2
.....
File-n
Sub-Directory-C
File-1
... (1 Reply)
Hi,
I have dummies questions:
My script here can find the files in any directories older than 30 days then it will delete the files but not the directories. I would like to also be able to delete the directories that hold old files more than 30 days not just the files itself.
find . -type f... (2 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Need to make a script, to remove all empty files and folders from current category.
It also should show the name... (2 Replies)
I have a task, I usually do manually, but with growing responsibilities I tend to forget to do this weekly, I want to write a script that automates this, but I cant seem to work it out in my head, I have the shell of it out, but need help, and you guys have helped me with EVERY problem I have... (5 Replies)
OS: SUNOS 5.10 i386
Hello guys I wrote a shell script in bash shell to delete the files less than 30 days old. The following is the script.
=======================================
#!/bin/bash
for dirs in `/clu04/oracle/directory_list.lst`
do
find $dirs -type f -mtime -30 -exec rm {} \;... (3 Replies)
hi,
i have a requirement to delete all the files from all the directories except some specific directories like archive and log.
for example:
there are following directories such as
A B C D Archive E Log F
which contains some sub directories and files. The requirement is to delete all the... (7 Replies)
I wrote a shell script program that supposed to delete any directories and its files that begin with the same character string . The program is designed to delete directories and its files that are one day old or less and only the directories that begin with the same character string. The problem... (1 Reply)
Discussion started by: dellanicholson
1 Replies
LEARN ABOUT SUSE
rl
rl(1) User Commands rl(1)NAME
rl - Randomize Lines.
SYNOPSIS
rl [OPTION]... [FILE]...
DESCRIPTION
rl reads lines from a input file or stdin, randomizes the lines and outputs a specified number of lines. It does this with only a single
pass over the input while trying to use as little memory as possible.
-c, --count=N
Select the number of lines to be returned in the output. If this argument is omitted all the lines in the file will be returned in
random order. If the input contains less lines than specified and the --reselect option below is not specified a warning is printed
and all lines are returned in random order.
-r, --reselect
When using this option a single line may be selected multiple times. The default behaviour is that any input line will only be
selected once. This option makes it possible to specify a --count option with more lines than the file actually holds.
-o, --output=FILE
Send randomized lines to FILE instead of stdout.
-d, --delimiter=DELIM
Use specified character as a "line" delimiter instead of the newline character.
-0, --null
Input lines are terminated by a null character. This option is useful to process the output of the GNU find -print0 option.
-n, --line-number
Output lines are numbered with the line number from the input file.
-q, --quiet, --silent
Be quiet about any errors or warnings.
-h, --help
Show short summary of options.
-v, --version
Show version of program.
EXAMPLES
Some simple demonstrations of how rl can help you do everyday tasks.
Play a random sound after 4 minutes (perfect for toast):
sleep 240 ; play `find /sounds -name '*.au' -print | rl --count=1`
Play the 15 most recent .mp3 files in random order.
ls -c *.mp3 | head -n 15 | rl | xargs --delimiter='
' play
Roll a dice:
seq 6 | rl --count 2
Roll a dice 1000 times and see which number comes up more often:
seq 6 | rl --reselect --count 1000 | sort | uniq -c | sort -n
Shuffle the words of a sentence:
echo -n "The rain in Spain stays mainly in the plain."
| rl --delimiter=' ';echo
Find all movies and play them in random order.
find . -name '*.avi' -print0 | rl -0 | xargs -n 1 -0 mplayer
Because -0 is used filenames with spaces (even newlines and other unusual characters) in them work.
BUGS
The program currently does not have very smart memory management. If you feed it huge files and expect it to fully randomize all lines it
will completely read the file in memory. If you specify the --count option it will only use the memory required for storing the specified
number of lines. Improvements on this area are on the TODO list.
The program uses the rand() system random function. This function returns a number between 0 and RAND_MAX, which may not be very large on
some systems. This will result in non-random results for files containing more lines than RAND_MAX.
Note that if you specify multiple input files they are randomized per file. This is a different result from when you cat all the files and
pipe the result into rl.
COPYRIGHT
Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Arthur de Jong.
This is free software; see the license for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Version 0.2.7 Jul 2008 rl(1)