Sponsored Content
Full Discussion: xargs
Top Forums UNIX for Dummies Questions & Answers xargs Post 6957 by Neo on Sunday 16th of September 2001 06:59:34 PM
Old 09-16-2001
Someone else can reply better than I concerning xargs because I rarely use that utility.

FWIW: if I had your problem I would write a 5 line PERL script that:

(1) opens the file
(2) reads each line into a $variable
(3) executes the DB command with $variable.

You can also do this with other shell languages using the same basic idea/algorithm above.

Someone familar with PERL , for example, could write the script faster than it takes to post to the forum Smilie because it is just a few lines of code.

Others may want to discuss your xarg problem-solution more directly......


can you believe it?? ...... i was just making a peanut-butter-and-jelly sand' and dropped a big hunk of peanut butter on the keyboard replying to this post .... Smilie
 

10 More Discussions You Might Find Interesting

1. 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

2. 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

3. 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

4. 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

5. 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

6. Shell Programming and Scripting

Xargs and

Hello there, Let me show you a simple example of what I am trying to achieve: 1) I have an input text file with some lines: 1 a 2 b 3 c 2) And I want to run a command with these lines as arguments (+ arbitrary extra arguments). For example: $ command "1 a" "2 b" "3 c" "bye" I... (7 Replies)
Discussion started by: tokland
7 Replies

7. 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

8. 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

9. 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

10. 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
tclsh(1)							 Tcl Applications							  tclsh(1)

__________________________________________________________________________________________________________________________________________________

NAME
tclsh - Simple shell containing Tcl interpreter SYNOPSIS
tclsh ?fileName arg arg ...? _________________________________________________________________ DESCRIPTION
Tclsh is a shell-like application that reads Tcl commands from its standard input or from a file and evaluates them. If invoked with no arguments then it runs interactively, reading Tcl commands from standard input and printing command results and error messages to standard output. It runs until the exit command is invoked or until it reaches end-of-file on its standard input. If there exists a file .tclshrc (or tclshrc.tcl on the Windows platforms) in the home directory of the user, tclsh evaluates the file as a Tcl script just before reading the first command from standard input. SCRIPT FILES
If tclsh is invoked with arguments then the first argument is the name of a script file and any additional arguments are made available to the script as variables (see below). Instead of reading commands from standard input tclsh will read Tcl commands from the named file; tclsh will exit when it reaches the end of the file. The end of the file may be marked either by the physical end of the medium, or by the | character, '32' ('u001a', control-Z). If this character is present in the file, the tclsh application will read text up to but not | including the character. An application that requires this character in the file may safely encode it as ``32'', ``x1a'', or | ``u001a''; or may generate it by use of commands such as format or binary. There is no automatic evaluation of .tclshrc when the name of a script file is presented on the tclsh command line, but the script file can always source it if desired. If you create a Tcl script in a file whose first line is #!/usr/bin/tclsh then you can invoke the script file directly from your shell if you mark the file as executable. This assumes that tclsh has been installed in the default location in /usr/bin; if it's installed somewhere else then you'll have to modify the above line to match. Many UNIX systems do not allow the #! line to exceed about 30 characters in length, so be sure that the tclsh executable can be accessed with a short file name. An even better approach is to start your script files with the following three lines: #!/bin/sh # the next line restarts using tclsh exec tclsh "$0" "$@" This approach has three advantages over the approach in the previous paragraph. First, the location of the tclsh binary doesn't have to be hard-wired into the script: it can be anywhere in your shell search path. Second, it gets around the 30-character file name limit in the previous approach. Third, this approach will work even if tclsh is itself a shell script (this is done on some systems in order to handle multiple architectures or operating systems: the tclsh script selects one of several binaries to run). The three lines cause both sh and tclsh to process the script, but the exec is only executed by sh. sh processes the script first; it treats the second line as a comment and executes the third line. The exec statement cause the shell to stop processing and instead to start up tclsh to reprocess the entire script. When tclsh starts up, it treats all three lines as comments, since the backslash at the end of the second line causes the third line to be treated as part of the comment on the second line. You should note that it is also common practise to install tclsh with its version number as part of the name. This has the advantage of | allowing multiple versions of Tcl to exist on the same system at once, but also the disadvantage of making it harder to write scripts that | start up uniformly across different versions of Tcl. VARIABLES
Tclsh sets the following Tcl variables: argc Contains a count of the number of arg arguments (0 if none), not including the name of the script file. argv Contains a Tcl list whose elements are the arg arguments, in order, or an empty string if there are no arg arguments. argv0 Contains fileName if it was specified. Otherwise, contains the name by which tclsh was invoked. tcl_interactive Contains 1 if tclsh is running interactively (no fileName was specified and standard input is a terminal-like device), 0 otherwise. PROMPTS
When tclsh is invoked interactively it normally prompts for each command with ``% ''. You can change the prompt by setting the variables tcl_prompt1 and tcl_prompt2. If variable tcl_prompt1 exists then it must consist of a Tcl script to output a prompt; instead of out- putting a prompt tclsh will evaluate the script in tcl_prompt1. The variable tcl_prompt2 is used in a similar way when a newline is typed but the current command isn't yet complete; if tcl_prompt2 isn't set then no prompt is output for incomplete commands. STANDARD CHANNELS
See Tcl_StandardChannels for more explanations. SEE ALSO
fconfigure(n), tclvars(n) KEYWORDS
argument, interpreter, prompt, script file, shell Tcl tclsh(1)
All times are GMT -4. The time now is 02:07 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy