Sponsored Content
Top Forums Shell Programming and Scripting how to redirect multiple input files? Post 302356606 by microstarwwx on Saturday 26th of September 2009 10:49:26 AM
Old 09-26-2009
how to redirect multiple input files?

I have a program that runs like "cat f1 - f2 -", I need to write shell script to run the program whose standard input will be redirected from 2 files. I spend a whole day on it, but didn't figure out. Can someone help me out? Thanks!
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Redirect output to multiple files.

Hi, I am new to shell scripting and have a question. I would like to redirect the output of a command to multiple files, each file holding the exact same copy. From what I read from the bash manpage and from some searching it seems it cannot be done within the shell except setting up a loop. Is... (3 Replies)
Discussion started by: cbkihong
3 Replies

2. UNIX for Dummies Questions & Answers

can you redirect multiple files for input?

I have a program that is reading strings into a vector from a file. Currently I am using this command: a.out < file1 The program runs and prints the contents of the vector to the screen, like its supposed to. The problem is that it needs to read in 3 files to fill the vector. Is there anyway... (4 Replies)
Discussion started by: Matrix_Prime
4 Replies

3. Shell Programming and Scripting

Splitting input files into multiple files through AWK command

Hi, I needs to split *.txt files from single directory depends on the some mutltiple input values. i have wrote the code like below for file in *.txt do grep -i -h "value1|value2" $file > $file; done. My requirment is more input values needs to be given in grep; let us say 50... (3 Replies)
Discussion started by: arund_01
3 Replies

4. Shell Programming and Scripting

How to redirect the output to multiple files without putting on console

How to redirect the output to multiple files without putting on console I tried tee but it writes to STDOUT , which I do not want. Test.sh ------------------ #!/bin/ksh echo "Hello " tee -a file1 file2 ---------------------------- $>./Test.sh $> Expected output: -------------------... (2 Replies)
Discussion started by: prashant43
2 Replies

5. Shell Programming and Scripting

How to Pull out multiple files from DB table and redirect all those files to a differetn directory?

Hi everyone!! I have a database table, which has file_name as one of its fields. Example: File_ID File_Name Directory Size 0001 UNO_1232 /apps/opt 234 0002 UNO_1234 /apps/opt 788 0003 UNO_1235 /apps/opt 897 0004 UNO_1236 /apps/opt 568 I have to... (3 Replies)
Discussion started by: ss3944
3 Replies

6. UNIX for Dummies Questions & Answers

Redirect stdin stdout to multiple files

Hi, i know how to a) redirect stdout and stderr to one file, b) and write to two files concurrently with same output using tee command Now, i want to do both the above together. I have a script and it should write both stdout and stderr in one file and also write the same content to... (8 Replies)
Discussion started by: ysrini
8 Replies

7. Shell Programming and Scripting

find string from multiple dir and redirect to new files

Hi, I am new to script and I want find one string from multiple files in diff directories and put that out put to new file. Like I have A,B & C directories and each has multiple files but one file is unic in all the directories like COMM.txt Now I want write script to find the string... (8 Replies)
Discussion started by: Mahessh123
8 Replies

8. Shell Programming and Scripting

Receiving 'ambiguous redirect' when trying to run command against multiple files

I came across the command string on https://www.unix.com/shell-programming-scripting/141885-awk-removing-data-before-after-pattern.html which was what I was looking for to be able to remove data before a certain pattern. However, outputting the result to a file seems to work on an individual basis... (4 Replies)
Discussion started by: HLee1981
4 Replies

9. Shell Programming and Scripting

awk, multiple files input and multiple files output

Hi! I'm new in awk and I need some help. I have a folder with a lot of files and I need that awk do something in each file and print a new file with the output. The input file name should be modified when I print the outpu files. Thanks in advance for help! :-) ciao (5 Replies)
Discussion started by: gabrysfe
5 Replies

10. Shell Programming and Scripting

[Solved] Multiple input files and output files

Hi, I have many test*.ft1 files to which I want to read as input for a script called pipe2txt.tcl and print the output in each separate file. For example, pipe2txt.tcl < test001.ft1 > test001.txt How can I read many files in this maner? thank you very much, Best, Pahuja (5 Replies)
Discussion started by: Pahuja
5 Replies
rm(1)							      General Commands Manual							     rm(1)

Name
       rm, rmdir - remove (unlink) files or directories

Syntax
       rm [-f] [-r] [-i] [-] file-or-directory-name...
       rmdir directory-name...

Description
       The command removes the entries for one or more files from a directory.	If there are no links to the file then the file is destroyed.  For
       further information, see

       The command removes entries for the named directories, which must be empty.  If they are not empty, the directories remain, and displays an
       error message (see EXAMPLES).

       To  remove  a file, you must have write permission in its directory, but you do not need read or write permission on the file itself.  When
       you are using from a terminal, and you do not have write permission on the file, the command asks for confirmation  before  destroying  the
       file.

       If  input  is redirected from the standard input device (your terminal), then checks to ensure that input is not coming from your terminal.
       If not, sets the -f option, which overrides the file protection, and removes the files silently, regardless of what you have  specified	in
       the file redirected as input to See EXAMPLES.

Options
       -    Specifies that the named files have names beginning with a minus (for example ).

       -f   Forces the removal of file or directory without first requesting confirmation.  Only system or usage messages are displayed.

       -i   Prompts  for yes or no response before removing each entry.  Does not ask when combined with the -f option.  If you type a y, followed
	    by any combination of characters, a yes response is assumed.

       -r   Recursively removes all entries from the specified directory and, then, removes the entry for that directory from  its  parent  direc-
	    tory.

Examples
       The following example shows how to remove a file in your current working directory.
       rm myfile
       This example shows use of the null option to remove a file beginning with a minus sign.
       rm - -gorp
       This example shows how a confirmation is requested for removal of a file for which you do not have write permission.
       rm testfile
       rm: override protection 400 for testfile? y
       This  example  shows  how  the combination of -i and -r options lets you examine all the files in a directory before removing them.  In the
       example, mydirectory is a subdirectory of the current working directory.  Note that the last question requests confirmation before removing
       the  directory  itself.	 Although  the user types ``y'', requesting removal of the directory, the command does not allow this, because the
       directory is not empty; the user typed ``n'' to the question about the file file2 , so file2 was not removed.
       rm -ir mydirectory
       rm: remove mydirectory/file1? y
       rm: remove mydirectory/file2? n
	     .
	     .
	     .
       rm: remove mydirectory? y
       rm: mydirectory: Directory not empty
       This example illustrates that overrides file protection when input is redirected from the standard input device.  The user creates  a  file
       named ``alfie'', with a read-only file protection.  The user then creates a file named ``ans'' to contain the character ``n''.  The command
       following destroys the file ``alfie'', even though the redirected input file requested no deletion.
       cat > alfie
       hello
       ^d
       chmod 444 alfie
       cat > ans
       n
       ^d
       rm < ans alfie

See Also
       unlink(2)

																	     rm(1)
All times are GMT -4. The time now is 10:09 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy