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Full Discussion: A difficult script (for me)
Top Forums Shell Programming and Scripting A difficult script (for me) Post 302156183 by DNAx86 on Monday 7th of January 2008 03:04:18 PM
Old 01-07-2008
Quote:
Originally Posted by gus2000
First, you won't get variable substitution inside single-quotes:

Code:
# x=123
# echo 'x=$x'       # string is literal
x=$x

# echo "x=$x"       # string is evaluated by the shell
x=123

# echo "x='$x'"
x='123'

Single-quotes lose their special quoting superpowers when inside double-quotes.

Also, if you pass a string to a command that includes a dash ("-") you run the risk of the string being interpreted as flags. You should therefore use the double-dash to indicate that no more flags are coming:

Code:
grep -c -v -- "$string" $file

So if "$string" includes any dashes, they will be ignored since they are after the "--".
Thanks.

Now, I don't know how to separate the colums of ls -lR using CUT (or using another command) to select oly the rows that are created by the user
 

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LEARN ABOUT SUNOS

script

script(1)							   User Commands							 script(1)

NAME

       script - make record of a terminal session

SYNOPSIS

       script [-a] [filename]

DESCRIPTION

       The  script  utility  makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
       record is saved in the file typescript. See WARNINGS.

       The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
       when the forked shell exits or when Control-d is typed.

OPTIONS

       The following option is supported:

       -a	Appends the session record to filename, rather than overwriting it.

NOTES

       script places everything that appears on the screen in filename, including prompts.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

WARNINGS

       script  can  pose  a  security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
       privileged user, that is, root. Be sure that typescript is not a link before running script.

SunOS 5.10							    30 Jan 2004 							 script(1)
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