hi,
How can I check for a field in a pipe-delimited file having a NULL value in Unix using a grep command or any other command.
Please reply (5 Replies)
Hi All,
I have a table with 10 columns. Some columns(2nd,4th,5th,7th,8th and 10th) are Not Null columns. I'll get a tab-delimited file and want to check col by col and generate seperate error code for each col eg:102 if 2nd col value is NULL and 104 if 4th col value is NULL so on... I am a... (7 Replies)
Hi:
I have a text file date(pipe delimited) which is loaded in to the DB using sql loader(&CTL files) after some initial validation by the shell script.
Now i have a situation where the shell script needs to check a column in the text file and if it is NULL then it needs send this record/row... (12 Replies)
Hi,
I have a pipe delimited txt file which contains 17 fields per line/row.
16th field contains email id. I want to count the number of lines/rows that contains null in the 16th field.
Plz find attached example data file.
I'm looking for a command line/script which achieves this.
... (5 Replies)
hi,
I have pipe delimited flat file as below
1|ab|4.5|9|
2|ac|3|12|
3|ac|4.5|8|
i want to show (display) only 3rd field between pipes.
please help (1 Reply)
Hi,
I am trying to find the lines in a pipe delimited file where 11th column has not null values. Any help is appreciated. Need help asap please.
thanks in advance. (3 Replies)
Hi All,
I have a large dat file where each lines are pipe delimited values. I need to parse the file depending on the request. For example: sometimes I have told to remove all the values in the 7th column (this case remove values '3333' only from the first line and '3543' from the second line)... (4 Replies)
Hi,
I have a pipe delimited file as below and I need to replace the 2nd column of each line with null values.
1|10/15/2011|fname1|lname1
2|10/15/2012|fname2|lname2
3|10/15/2013|fname3|lname3
Output file:
1||fname1|lname1
2||fname2|lname2
3||fname3|lname3
I tried this
... (2 Replies)
I have an input file as below
Emp1|FirstName|MiddleName|LastName|Address|Pincode|PhoneNumber
1234|FirstName1|MiddleName2|LastName3| Add1 || ADD2|123|000000000
Output :
1234|FirstName1|MiddleName2|LastName3| Add1 ,, ADD2|123|000000000
OR
1234,FirstName1,MiddleName2,LastName3, Add1 ||... (2 Replies)
Discussion started by: styris
2 Replies
LEARN ABOUT MINIX
pipe
PIPE(2) System Calls Manual PIPE(2)NAME
pipe - create an interprocess communication channel
SYNOPSIS
#include <unistd.h>
int pipe(int fildes[2])
DESCRIPTION
The pipe system call creates an I/O mechanism called a pipe. The file descriptors returned can be used in read and write operations. When
the pipe is written using the descriptor fildes[1] up to PIPE_MAX bytes of data are buffered before the writing process is suspended. A
read using the descriptor fildes[0] will pick up the data.
PIPE_MAX equals 7168 under Minix, but note that most systems use 4096.
It is assumed that after the pipe has been set up, two (or more) cooperating processes (created by subsequent fork calls) will pass data
through the pipe with read and write calls.
The shell has a syntax to set up a linear array of processes connected by pipes.
Read calls on an empty pipe (no buffered data) with only one end (all write file descriptors closed) returns an end-of-file.
The signal SIGPIPE is generated if a write on a pipe with only one end is attempted.
RETURN VALUE
The function value zero is returned if the pipe was created; -1 if an error occurred.
ERRORS
The pipe call will fail if:
[EMFILE] Too many descriptors are active.
[ENFILE] The system file table is full.
[ENOSPC] The pipe file system (usually the root file system) has no free inodes.
[EFAULT] The fildes buffer is in an invalid area of the process's address space.
SEE ALSO sh(1), read(2), write(2), fork(2).
NOTES
Writes may return ENOSPC errors if no pipe data can be buffered, because the pipe file system is full.
BUGS
Should more than PIPE_MAX bytes be necessary in any pipe among a loop of processes, deadlock will occur.
4th Berkeley Distribution August 26, 1985 PIPE(2)