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1. Shell Programming and Scripting
Hello,
I am trying to move all the file listed by below command to /tmp/testing directory
find ./ -maxdepth 1 -type f -mtime +3
I tried using -exec and xargs - none of the combination is working?
Please, help (3 Replies)
Discussion started by: saurabh84g
3 Replies
2. Shell Programming and Scripting
Hi,
What is the difference between the following commands
find . -type f -exec grep 'abc' {} \;
and
find . -type f | xargs grep 'abc'
Appreciate your help. (2 Replies)
Discussion started by: bobbygsk
2 Replies
3. Shell Programming and Scripting
Hi All,
i'm trying to create a tar of all the .txt files i find in my dir . I've used xargs to acheive this but i wanted to do this with exec and looks like it only archives the last file it finds . can some one advice what's wrong here :
find . -type f -name "*.txt" -print0 | xargs -0... (9 Replies)
Discussion started by: Irishboy24
9 Replies
4. Shell Programming and Scripting
I have the following bash script lines in a file named test.sh.
#!/bin/bash
#
# Write Date to cron.log
#
echo "Begin SSI Load $(date +%d%b%y_%T)"
#
# Get the latest rates file for processing.
#
d=$(ls -tr /rms/data/ssi | grep -v "processed" | tail -n 1)
filename=$d
export filename... (3 Replies)
Discussion started by: ginowms
3 Replies
5. Programming
I have read several docs on these on the web and looked at examples. I can't figure out the difference. In some cases you use one or the other or you combine them.
can someone help me understand this? (1 Reply)
Discussion started by: guessingo
1 Replies
6. Shell Programming and Scripting
Hey all. Just a fast question, what is the technical difference between using back ticks and using xargs to perform a command?
Here's an example
Find /mydir -name *.conf |xargs rm
Vs
Rm 'find /mydir -name *.conf'
Is there a performance hit? I know they do the same thing but which is... (1 Reply)
Discussion started by: msarro
1 Replies
7. AIX
Hi ,
Can somebody explain what is the difference in the below commands.. when using Xargs its giving all the hidden files and is it something xargs will do recursive searching or parsing ?
find . -type f -links 1 | xargs ls -li
find . -type f -links 1 | ls -li (1 Reply)
Discussion started by: Karthikeyan K
1 Replies
8. Shell Programming and Scripting
What I'm trying to do is perform a copy, well a ditto actually, on the results of a find command, but some inline string substitution needs to happen.
So if I run this code find ./ -name "*.tif" I get back these results.
.//1234567.tif
.//abcdefg.tif
Now the action from exec or xargs I... (2 Replies)
Discussion started by: myndcraft
2 Replies
9. Shell Programming and Scripting
Hi
I need to move multiple (say 10 files) from one location to another location. My selection would be like this...
ls -ltr *.arc | head ---> Need to move top 10 files with single command without iterating in loop. I know we can move files like this with find command but not sure if I can... (4 Replies)
Discussion started by: malaymaru
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10. UNIX for Dummies Questions & Answers
What is the difference between sourcing a script, running it or execing it? (1 Reply)
Discussion started by: 98_1LE
1 Replies
XARGS(1) BSD General Commands Manual XARGS(1)
NAME
xargs -- construct argument list(s) and execute utility
SYNOPSIS
xargs [-0opt] [-E eofstr] [-I replstr [-R replacements]] [-J replstr] [-L number] [-n number [-x]] [-P maxprocs] [-s size]
[utility [argument ...]]
DESCRIPTION
The xargs utility reads space, tab, newline and end-of-file delimited strings from the standard input and executes utility with the strings
as arguments.
Any arguments specified on the command line are given to utility upon each invocation, followed by some number of the arguments read from the
standard input of xargs. The utility is repeatedly executed until standard input is exhausted.
Spaces, tabs and newlines may be embedded in arguments using single (`` ' '') or double (``"'') quotes or backslashes (``''). Single quotes
escape all non-single quote characters, excluding newlines, up to the matching single quote. Double quotes escape all non-double quote char-
acters, excluding newlines, up to the matching double quote. Any single character, including newlines, may be escaped by a backslash.
The options are as follows:
-0 Change xargs to expect NUL (`` '') characters as separators, instead of spaces and newlines. This is expected to be used in concert
with the -print0 function in find(1).
-E eofstr
Use eofstr as a logical EOF marker.
-I replstr
Execute utility for each input line, replacing one or more occurrences of replstr in up to replacements (or 5 if no -R flag is speci-
fied) arguments to utility with the entire line of input. The resulting arguments, after replacement is done, will not be allowed to
grow beyond 255 bytes; this is implemented by concatenating as much of the argument containing replstr as possible, to the con-
structed arguments to utility, up to 255 bytes. The 255 byte limit does not apply to arguments to utility which do not contain
replstr, and furthermore, no replacement will be done on utility itself. Implies -x.
-J replstr
If this option is specified, xargs will use the data read from standard input to replace the first occurrence of replstr instead of
appending that data after all other arguments. This option will not affect how many arguments will be read from input (-n), or the
size of the command(s) xargs will generate (-s). The option just moves where those arguments will be placed in the command(s) that
are executed. The replstr must show up as a distinct argument to xargs. It will not be recognized if, for instance, it is in the
middle of a quoted string. Furthermore, only the first occurrence of the replstr will be replaced. For example, the following com-
mand will copy the list of files and directories which start with an uppercase letter in the current directory to destdir:
/bin/ls -1d [A-Z]* | xargs -J % cp -rp % destdir
-L number
Call utility for every number non-empty lines read. A line ending with a space continues to the next non-empty line. If EOF is
reached and fewer lines have been read than number then utility will be called with the available lines. The -L and -n options are
mutually-exclusive; the last one given will be used.
-n number
Set the maximum number of arguments taken from standard input for each invocation of utility. An invocation of utility will use less
than number standard input arguments if the number of bytes accumulated (see the -s option) exceeds the specified size or there are
fewer than number arguments remaining for the last invocation of utility. The current default value for number is 5000.
-o Reopen stdin as /dev/tty in the child process before executing the command. This is useful if you want xargs to run an interactive
application.
-P maxprocs
Parallel mode: run at most maxprocs invocations of utility at once.
-p Echo each command to be executed and ask the user whether it should be executed. An affirmative response, 'y' in the POSIX locale,
causes the command to be executed, any other response causes it to be skipped. No commands are executed if the process is not
attached to a terminal.
-R replacements
Specify the maximum number of arguments that -I will do replacement in. If replacements is negative, the number of arguments in
which to replace is unbounded.
-s size
Set the maximum number of bytes for the command line length provided to utility. The sum of the length of the utility name, the
arguments passed to utility (including NULL terminators) and the current environment will be less than or equal to this number. The
current default value for size is ARG_MAX - 4096.
-t Echo the command to be executed to standard error immediately before it is executed.
-x Force xargs to terminate immediately if a command line containing number arguments will not fit in the specified (or default) command
line length.
If utility is omitted, echo(1) is used.
Undefined behavior may occur if utility reads from the standard input.
The xargs utility exits immediately (without processing any further input) if a command line cannot be assembled, utility cannot be invoked,
an invocation of utility is terminated by a signal, or an invocation of utility exits with a value of 255.
LEGACY DESCRIPTION
In legacy mode, the -L option treats all newlines as end-of-line, regardless of whether the line is empty or ends with a space. In addition,
the -L and -n options are not mutually-exclusive.
For more information about legacy mode, see compat(5).
EXIT STATUS
The xargs utility exits with a value of 0 if no error occurs. If utility cannot be found, xargs exits with a value of 127, otherwise if
utility cannot be executed, xargs exits with a value of 126. If any other error occurs, xargs exits with a value of 1.
SEE ALSO
echo(1), find(1), execvp(3), compat(5)
STANDARDS
The xargs utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compliant. The -J, -o, -P and -R options are non-standard FreeBSD exten-
sions which may not be available on other operating systems.
HISTORY
The xargs command appeared in PWB UNIX.
BUGS
If utility attempts to invoke another command such that the number of arguments or the size of the environment is increased, it risks
execvp(3) failing with E2BIG.
The xargs utility does not take multibyte characters into account when performing string comparisons for the -I and -J options, which may
lead to incorrect results in some locales.
BSD
August 2, 2004 BSD