Deference between pipe and normal file

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

How to grep a line not starting with # from a file (there are two lines starting with # and normal)?

e.g. File name: File.txt cat File.txt Result: #INBOUND_QUEUE=FAQ1 INBOUND_QUEUE=FAQ2 I want to get the value for one which is not commented out. Thanks,

2. Solaris

NFS - concurrent write to same file normal ?

Hi all, Sorry if I sound like a novice , I have always thought that for network file system which can be shared, there will be some access restriction in which when user A is writing/editing fileA, user B is able to view the same fileA but cannot write/edit it until user A has...

3. Shell Programming and Scripting

How to cut a pipe delimited file and paste it with another file to form a comma separated outputfile

Hello ppl I have a requirement to split (cut in unix) a file (A.txt) which is a pipe delimited file into A1.txt and A2.txt Now I have to join (paste in unix) this A2.txt with external file A3.txt to form output file A4.txt which should be CSV (comma separated file) so that third party can...

4. Shell Programming and Scripting

How to ignore Pipe in Pipe delimited file?

Hi guys, I need to know how i can ignore Pipe '|' if Pipe is coming as a column in Pipe delimited file for eg: file 1: xx|yy|"xyz|zzz"|zzz|12... using below awk command awk 'BEGIN {FS=OFS="|" } print $3 i would get xyz But i want as : xyz|zzz to consider as whole column...

5. Shell Programming and Scripting

csv file comparison with normal file

i will like to give my files as fileB : 02.09.2011:MOU04/KUBIS--R_Lieferung_1/KUBIS_V15.0/vpn_wls_15-0-0b01 02.09.2011:MOU04/KUBIS--R_Lieferung_2/KUBIS_V15.0/apng_wls_15-0-0b02 31 02.09.2011:MOU04/KUBIS--R_Lieferung_2/KUBIS_V15.0/ecc_wls_15-0-0b02 32 ...

6. UNIX for Dummies Questions & Answers

Pipe binary file matches grep results to file

I am using grep to match a pattern, but the output is strange. $ grep -r -o "pattern" * Gives me: Binary file foo1 matches Binary file foo2 matches Binary file foo3 matches To find the lines before/after, I then have to use the following on each file: $ strings foo1 | grep -A1 -B1...

7. UNIX for Dummies Questions & Answers

Determines a file is a NORMAL text file

I assign the variable name=`find . -type f | awk -vR=$num '{if (NR == R) {print; exit}}` which returns the name of a file in "$num" ordered in the folder to the variable $name. I want to use IF and determine if the file is a NORMAL text file (does not contain an extension), the command will...

8. UNIX for Dummies Questions & Answers

[URGENT] Determines a file is a NORMAL text file

9. Shell Programming and Scripting

Convert CSV file (with double quoted strings) to pipe delimited file

Hi, could some help me convert CSV file (with double quoted strings) to pipe delimited file: here you go with the same data: 1,Friends,"$3.99 per 1,000 listings",8158here " 1,000 listings " should be a single field. Thanks, Ram

10. Shell Programming and Scripting

identify files with "Normal termination" and compress them into a .tar.gz file

Hi, I have hundreds of files "*.out" located in one folder, and I want to: 1. Identify the good files containing "Normal termination" (grep "Normal termination" *.out ) 2. Compress the good files into a tar.gz file (tar cvfz good.tar.gz *.goog.out ) Is there a way I can automate this...

LEARN ABOUT PLAN9

pipe

PIPE(3) 						     Library Functions Manual							   PIPE(3)

NAME

       pipe - two-way interprocess communication

SYNOPSIS

       bind #| dir

       dir/data
       dir/ctl
       dir/data1
       dir/ctl1

DESCRIPTION

       An  attach(5) of this device allocates two new streams joined at the device end.  X/data and x/ctl are the data and control channels of one
       stream and x/data1 and x/ctl1 are the data and control channels of the other stream.

       Data written to one channel becomes available for reading at the other.	Write boundaries are preserved: each read terminates when the read
       buffer is full or after reading the last byte of a write, whichever comes first.

       Written data is buffered in kernel stream blocks.  The writer will block once the stream is full, typically after 32768 bytes or 16 writes.
       The writer will resume once the stream is less than half full.

       If there are multiple writers, each write is guaranteed to be available in a contiguous piece at the other end of the pipe.  If	there  are
       multiple readers, each read will return data from only one write.

       The  pipe(2)  system call performs an attach of this device and returns file descriptors to the new pipe's data and data1 files.  The files
       are open with mode ORDWR.

SEE ALSO

       pipe(2)

SOURCE

       /sys/src/9/port/devpipe.c

																	   PIPE(3)

Linux