Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

Xargs and

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Xargs and
# 8  
Old 03-09-2010
[QUOTE=alister;302402300]
Code:
printf '%s\n' "$@" | cat file - | xargs -d"\n" command

Neat! I didn't know that behavior of printf (from the Bash manual: "format is reused as necessary to consume all of the arguments").

You'll acknowledge, however, that this is not a exact str.join() because it appends the separator at the end. But just about what we needed in this case.

Quote:
Originally Posted by alister
That will work fine so long as none of the positional parameters in $@ contain an embedded newline, which is probably an unlikely scenario (all the other solutions in this thread are similarly flawed).
Yes, (tacit) initial assumption was that we don't have newlines in our data domain. That should cover most scenarios (why UNIX allowed newlines in filenames, I'll never know).
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Xargs

Hi, can anyone tell me in detail ? what the following do in detail ? I am trying to get a largest number in a list Thanks Tao LARGEST=$(echo $* | xargs -n1 | sort -nr | tail -1) (3 Replies)
Discussion started by: ccp
3 Replies

2. Shell Programming and Scripting

Xargs

Hello, I need some help with xargs $ ls aaa bbb ccc ddd$ ls | xargs -I{} ls -la {} -rw-rw-r--. 1 xxx xx 0 May 30 20:04 aaa -rw-rw-r--. 1 xxx xx 0 May 30 20:04 bbb -rw-rw-r--. 1 xxx xx 0 May 30 20:04 ccc -rw-rw-r--. 1 xxx xx 0 May 30 20:04 dddit's possible to have output like this with... (3 Replies)
Discussion started by: vikus
3 Replies

3. Shell Programming and Scripting

Help with xargs

Using the bash shell I'm trying to either create a command for the command line or a script that will show netstat info for a given process name. Here is an example of what I'm trying to do:$ ps aux |grep catalina |grep -v grep | awk '{print $2}' 5132 $ netstat -nlp |grep 5132 (Not all processes... (11 Replies)
Discussion started by: axiopisty
11 Replies

4. Shell Programming and Scripting

xargs

Dear all , any suggest on xargs to combine from (1.txt and 2.txt) to output.txt ? thanks a lot. 1.txt 0123 BUM-5M BUM-5M 93490481 63839 0124 BUM-5M BUM-5M 112112 ... (3 Replies)
Discussion started by: samoptimus
3 Replies

5. Shell Programming and Scripting

Help with xargs

hi Could any one please tell me the option using which we can run multiple commands using xargs I have list of files, I want to run dos2unix and chmod at one shot on them I tried google n searched man pages but couldnt really find the solution , please help right now im doing this ls... (4 Replies)
Discussion started by: sunilmenhdiratt
4 Replies

6. Shell Programming and Scripting

Help in using xargs

Hi, I have a requirement to RCP the files from remote server to local server. Also the RCP has to run in parallel. However using 'xargs' retrives 2 file names during each loop. How do we restrict to only one file name using xargs and loop till remaining files. I use the below code for... (2 Replies)
Discussion started by: senthil3d
2 Replies

7. Shell Programming and Scripting

Using xargs

hi i just want to know that how do we use xargs command to find files which are greater than specified memory in a given directory (6 Replies)
Discussion started by: sumit the cool
6 Replies

8. UNIX for Advanced & Expert Users

xargs -P

I discovered that GNU's xargs has a -P option to allow its processes to run in parallel. Great! Is this a GNU thing, or is it supported by other platforms as well? (4 Replies)
Discussion started by: otheus
4 Replies

9. Shell Programming and Scripting

why we use xargs..

hi , can anyone help me by saying why we use xargs.. is it acing like a place holder..? thanks, Krips. (3 Replies)
Discussion started by: kripssmart
3 Replies

10. UNIX for Dummies Questions & Answers

Help with xargs

Hi there, I am trying to move around 3000 files from one directory to another. The mv command is complaining from too many arguments. I tried to use the xargs command but with no luck. Could some body provide help? Regards (4 Replies)
Discussion started by: JimJim
4 Replies
Login or Register to Ask a Question

LEARN ABOUT SUNOS

fmt

fmt(1)								   User Commands							    fmt(1)

NAME

       fmt - simple text formatters

SYNOPSIS

       fmt [-cs] [-w width | -width]  [inputfile...]

DESCRIPTION

       fmt  is a simple text formatter that fills and joins lines  to produce output lines of (up to) the number of characters specified in the -w
       width option. The default  width is 72. fmt concatenates the inputfiles listed as arguments. If none are given, fmt formats text  from  the
       standard input.

       Blank lines are preserved in the output, as is the spacing between words. fmt does not fill nor split lines beginning with a `.' (dot), for
       compatibility with
	nroff(1). Nor does it fill or split a set of contiguous non-blank lines which is determined to be a mail header, the first line  of  which
       must begin with "From".

       Indentation is preserved in the output, and input lines with differing indentation are not joined (unless -c is used).

       fmt can also be used as an in-line text filter for vi(1). The  vi command:

	      !}fmt

       reformats the text between the cursor location and the end of the paragraph.

OPTIONS

       -c		       Crown margin mode. Preserve the indentation of the first two lines within a paragraph, and align the left margin of
			       each subsequent line with that of the second line. This is useful for tagged paragraphs.

       -s		       Split lines only. Do not join short lines to form longer ones. This prevents sample lines of code, and  other  such
			       formatted text, from being unduly combined.

       -w width | -width       Fill output lines to up to  width columns.

OPERANDS

       inputfile       Input file.

ENVIRONMENT VARIABLES

       See environ(5) for a description of the LC_CTYPE environment variable that affects the execution of fmt.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       nroff(1), vi(1), attributes(5), environ(5)

NOTES

       The -width option is acceptable for BSD compatibility, but it may go away in future releases.

SunOS 5.10							    9 May 1997								    fmt(1)