04-05-2018
Quote:
Originally Posted by
scriptor
Hi Rudic
you suggestion works
Thank you.
Quote:
. . . in this can you please explain the working of below part.
Explaining
sed's intricate operation in depth exceeds my language capabilities as well probably space provided in here; on top, there's many texts on the topic in them there internet sites... once you're finished reading
sed's man and / or info pages as the principle sources of information.
In short,
sed has a pattern space and a hold space; on the former all commands operate upon, the latter is only copied and / or appended to / from, or exchanged. The commands can be influenced by (ranges of) addresses, which themselves can be regex (important:
man regex!) matches like
/pattern/ (
/^1/ matches a char "1" in the first place of a line) or line numbers (1 is the first line in an input stream). Don't mix up the two! The most powerful
sed command is
s(ubstitute):
s/\n//g globally
substitutes the regex pattern
\n (escape sequence interpreted as a <new line> char) with the empty string, effectively removing it.
Quote:
. . . also I will be grateful to your if suggest me how should I also learnt or understand so that I can too build similar 1 line coding . . .
L1 - reading - exercise - reading - exercise - goto L1
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LEARN ABOUT SUSE
recordio
recordio(1) General Commands Manual recordio(1)
NAME
recordio - record the input and output of a program
SYNTAX
recordio program [ arg ... ]
DESCRIPTION
recordio runs program with the given arguments. It prints lines to stderr showing the input and output of program.
At the beginning of each line on stderr, recordio inserts the program process ID, along with < for input or > for output. At the end of
each line it inserts a space, a plus sign, or [EOF]; a space indicates that there was a newline in the input or output, and [EOF] indicates
the end of input or output.
recordio prints every packet of input and output immediately. It does not attempt to combine packets into coherent stderr lines. For
example,
recordio sh -c 'cat /dev/fd/8 2>&1' > /dev/null
could produce
5135 > cat: /dev/fd/8: Bad file descriptor
5135 > [EOF]
or
5135 > cat: +
5135 > /dev/fd/8+
5135 > : +
5135 > Bad file descriptor
5135 > [EOF]
recordio uses several lines for long packets to guarantee that each line is printed atomically to stderr.
recordio runs as a child of program. It exits when it sees the end of program's output.
SEE ALSO
tcpserver(1)
recordio(1)