10-19-2010
how to use sed for reading from a file, line by line?
I have a file, from where I need to extract some data. But, the condition is like following :
The script will read line by line,while checking if any line starts with 'MN'. If found true, it looks for if the immediate line starts with 'PQ' or not. If its true then, extract few fields from that line and print combining the both. Else print error.
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line(1) User Commands line(1)
NAME
line - read one line
SYNOPSIS
line
DESCRIPTION
The line utility copies one line (up to and including a new-line) from the standard input and writes it on the standard output. It returns
an exit status of 1 on EOF and always prints at least a new-line. It is often used within shell files to read from the user's terminal.
EXIT STATUS
Exit status is:
0 Successful completion
>0 End-of-file on input.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO
sh(1), read(2), attributes(5)
SunOS 5.10 1 Feb 1995 line(1)