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UNIX for Dummies Questions & Answers
GREPing for Nulls
Post 55730 by Dr. DOT on Friday 17th of September 2004 03:28:40 PM
09-17-2004
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9 More Discussions You Might Find Interesting
1. Programming
I'm relatively new to Pro*C programming. In the following example:
char name; EXEC SQL SELECT 'John Doe' INTO :name FROM DUAL;
"John Doe" is in positions 0-7, blanks in 8-19, and a null in 20. I would really prefer the null to be in position 8 and I don't care what's after that. I wrote a... (1 Reply)
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Hi,
I am trying to replace nulls with spaces in every record of a '|' delimited file. I used this command -
cat input.dat | sed 's/||/| |/g' > output
But if a space appears twice '| | |' , then only the first null is getting replaced with a space. The second one remains as a null. I... (7 Replies)
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When I try to sort a file where some records contain nulls i.e. hex 00 the sort truncates the record when it reaches the null and writes message:
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Hello,
I am checking the length of each line of a fixed length file and making sure all lines are 161 length. My problem is that some files contain null characters which gets stripped out of my echo. How do I have the NULLs included in my check? (and I cannot replace or sub the NULL values with... (10 Replies)
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Hi,
i have a file which contains data in fixed length. each row contains data of 10 characters fixed length. The data in the file appears like 4567782882
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6. Red Hat
I am trying to count the number of columns in a delimited flat file. The record is tab delimited. When I use the command wc -w, I am getting unexpected results when the record contains a NULL value. I believe it is because there is a "word" missing.
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Ok,
I'm stuck here with a plan to get what I need done completed.
I want to use perl to produce a document. lets say the document will be a pdf document.
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Hi,
I've a PIPE delimited file with about 5 fields. Sometimes the records in the 4th field is null, so I want to replace it based on values we get it on 2nd field in the same file.
Following is an example.
ABCD|X-TYPE 3.0|2010|X-TYPE|20000
CDEF|C-TYPE 2.5|2011|C-TYPE|10000
XYZ|LX... (4 Replies)
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I want to remove from a file the trailing null characters (0x00) and stop doing so when a different byte is found (which should not be deleted), and either put the result to the same file or a different one.
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LEARN ABOUT OSF1
xev
xev(1X) xev(1X) NAME
xev - print contents of X events SYNOPSIS
xev [-display displayname] [-geometry geom] [-bw pixels] [-bs {NotUseful,WhenMapped,Always}] [-id windowid] [-s] [-name string] [-rv] OPTIONS
This option specifies the X server to contact. This option specifies the size and/or location of the window. This option specifies the border width for the window. This option specifies what kind of backing store to give the window. The default is NotUseful. This option specifies that the window with the given id should be monitored, instead of creating a new window. This option specifies that save-unders should be enabled on the window. This option specifies the name to assign to the created window. This option specifies that the window should be in reverse video. DESCRIPTION
The xev program creates a window and then asks the X server to send it events whenever anything happens to the window (such as being moved, resized, typed in, clicked in, and so forth.). You can also attach it to an existing window. It is useful for seeing what causes events to occur and to display the information that they contain. SEE ALSO
X(1X), xwininfo(1X), xdpyinfo(1X), Xlib Programmers Manual, X Protocol Specification See X(1X) for a full statement of rights and permissions. AUTHOR
Jim Fulton, MIT X Consortium xev(1X)