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Shell Programming and Scripting
Finding out if there is text in a file.
Post 55454 by encrypted on Sunday 12th of September 2004 07:18:07 PM
09-12-2004
Quote:
Could you please explain the second line
grep "search_pattern" file_to_search
if [ $? -eq 0 ]
then rm file_to_search
exit 0
fi
grep "search_pattern" file_to_search
if [ $? -eq 0 ]
then rm file_to_search
exit 0
fi
executed properly(--grep found the pattern in the file)
and if an exit value of 0 is returned(i.e. command executed properly) it then removes the file <file_to_search>
Cheers!!
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LEARN ABOUT OPENSOLARIS
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 5.11 30 Jan 2004 script(1)