01-03-2020
Yes, the value of
outvar will just hold all the content of your file. You might prefer to process the variable or create another by reading the file in a different way. It's up to you, but you can use many ways to read specific things. For example:-
- To read the 3rd line, this would do sed -n3p This could be written as third_line="$(printf "%s" "${outvar}" | sed -n3p)" or third_line="$(sed -n3p filename)" depending
- To set a value if your file is null, you could [ ! -s filename ] && variable=0
- To set a value if your variable is null, you could [ -z "${outvar}" ] && outvar=0
- To scan for non-numerics and set the value to zero, you could attack it in several ways, e.g. delete the digits from the string and see if there's anything left; try to add zero and check the return code (writing all output/error messages to /dev/null to keep it clean) etc. etc. It depends what makes sense to you.
Does this help you sanity check your data?
Robin
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script(1) General Commands Manual script(1)
NAME
script - make typescript of terminal session
SYNOPSIS
[file]
DESCRIPTION
makes a typescript of everything printed on your terminal. It starts a shell named by the environment variable, or by default and silently
records a copy of output to your terminal from that shell or its descendents, using a pseudo-terminal device (see pty(7)).
All output is written to file, or appended to file if the option is given. If no file name is given, the output is saved in a file named
The recording can be sent to a line printer later with lp(1), or reviewed safely with the option of cat(1).
The recording ends when the forked shell exits (or the user ends the session by typing "exit") or the shell and all its descendents close
the pseudo-terminal device.
This program is useful when operating a CRT display and a hard-copy record of the dialog is desired. It can also be used for a simple form
of session auditing.
respects the convention for login shells as described in su(1), sh(1), and ksh(1). Thus, if it is invoked with a command name beginning
with a hyphen (that is, passes a basename to the shell that is also preceded by a hyphen.
The input flow control can be enabled by setting environmental variable before running Please see section for details on using this envi-
ronment variable.
EXAMPLES
Save everything printed on the user's screen into file
Append a copy of everything printed to the user's screen to file
WARNINGS
A command such as which displays the contents of the destination file, should not be issued while executing because it would cause to log
the output of the command to itself until all available disk space is filled. Other commands, such as more(1), can cause the same problem
but to a lesser degree.
records all received output in the file, including typing errors, backspaces, and cursor motions. Note that it does not record typed char-
acters; only echoed characters. Thus passwords are not recorded in the file. Responses other than simple echoes (such as output from
screen-oriented editors and command editing) are recorded as they appeared in the original session.
When there is no input flow control is not set), there can be some data loss while using However, script(1) can behave unexpectedly, if is
set and is not set.
AUTHOR
was developed by the University of California, Berkeley and HP.
script(1)