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unix "script" command (Security)

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# 8  
Old 10-07-2002
Krusty,

You will have a problem with this if your users use vi. It is not very compatible with the script command.

Commands like cat and more and vi will cause grief for you.


From the man page for script.


WARNINGS
A command such as cat scott, which displays the contents of the
destination file, should not be issued while executing script because
it would cause script to log the output of the cat 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.

script records all received output in the file, including typing
errors, backspaces, and cursor motions. Note that it does not record
typed characters; only echoed characters. Thus passwords are not
recorded in the file. Responses other than simple echoes (such as output from screen-oriented editors and ksh command editing) are
recorded as they appeared in the original session.



Smilie
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LEARN ABOUT CENTOS

source

source(n)						       Tcl Built-In Commands							 source(n)

__________________________________________________________________________________________________________________________________________________

NAME

       source - Evaluate a file or resource as a Tcl script

SYNOPSIS

       source fileName

       source -encoding encodingName fileName													   |
_________________________________________________________________

DESCRIPTION

       This  command takes the contents of the specified file or resource and passes it to the Tcl interpreter as a text script.  The return value
       from source is the return value of the last command executed in the script.  If an error occurs in evaluating the contents  of  the  script
       then  the source command will return that error.  If a return command is invoked from within the script then the remainder of the file will
       be skipped and the source command will return normally with the result from the return command.

       The end-of-file character for files is "32" (^Z) for all platforms.  The source command will  read  files  up  to  this  character.   This
       restriction  does  not  exist for the read or gets commands, allowing for files containing code and data segments (scripted documents).	If
       you require a "^Z" in code for string comparison, you can use "32" or "u001a", which will be safely substituted by the  Tcl  interpreter
       into "^Z".

       The  -encoding  option  is  used  to specify the encoding of the data stored in fileName.  When the -encoding option is omitted, the system |
       encoding is assumed.

EXAMPLE

       Run the script in the file foo.tcl and then the script in the file bar.tcl:
	      source foo.tcl
	      source bar.tcl
       Alternatively:
	      foreach scriptFile {foo.tcl bar.tcl} {
		 source $scriptFile
	      }

SEE ALSO

       file(n), cd(n), encoding(n), info(n)

KEYWORDS

       file, script

Tcl																	 source(n)