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Full Discussion: Add Variable in .bash_profile
Top Forums Shell Programming and Scripting Add Variable in .bash_profile Post 302524578 by mirni on Tuesday 24th of May 2011 01:28:33 AM
Old 05-24-2011
This sed command inserts (i) a line 'IMPACT_HOME=/my/new/path' before every line in infile; which is almost certainly not what you want.
You may want to make #1 look like:
Code:
grep -q IMPACT_HOME infile || sed '$ a IMPACT_HOME=/my/new/path' infile

which will append (a) the line at the end of file ($).

#2 is a little trickier. I think the intention was to substitute the definition of IMAPCT_HOME with a new path, however, this is a not quite well designed solution. The sed command there will replace any occurence of IMPACT_HOME until the end of line with 'IMPACT_HOME=/my/new/path'.
But what if infile contains some other statements containing IMPACT HOME, that are not a definition of it? E.g.:
Code:
if [ -z "$IMPACT_HOME" ] ; then 
 #do something
fi

would change into
Code:
if [ -z "$IMPACT_HOME=/my/new/path
 #do something
fi

and create syntax error(s).
I'd write #2 like this:
Code:
grep -q IMPACT_HOME infile && sed -i 's!^\([^#]*IMPACT_HOME=\)\(.*\)!\1/my/new/path #\2!' infile

Which will change the first line containing 'IMPACT_HOME='.
It will put the old definition (string after equal sign) into a comment on the same line. So, e.g. line:
Code:
IMPACT_HOME=/old/path

will become
Code:
IMPACT_HOME=/my/new/path #/old/path

It will only change (at most) one line (no 'g' at the end); and it will not change lines containing pound symbol before IMPACT_HOME (comments).

#1 and #2 can actually be put together into one (albeit long) line:
Code:
grep -q IMPACT_HOME infile && sed -i 's!^\([^#]*IMPACT_HOME=\)\(.*\)!\1/my/new/path #\2!' infile || sed '$ a IMPACT_HOME=/my/new/path' infile

 

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xmscrollvisible

XmScrollVisible(library call)											     XmScrollVisible(library call)

NAME

       XmScrollVisible -- A ScrolledWindow function that makes an invisible
	descendant of a ScrolledWindow work area visible

SYNOPSIS

       #include <Xm/ScrolledW.h>
       void XmScrollVisible(
       Widget scrollw_widget,
       Widget widget,
       Dimension left_right_margin,
       Dimension top_bottom_margin);

DESCRIPTION

       XmScrollVisible makes an obscured or partially obscured widget or gadget descendant of a ScrolledWindow work area visible. The function re-
       positions the work area and sets the specified margins between the widget and the nearest viewport boundary. The widget's location relative
       to  the	viewport determines whether one or both of the margins must be adjusted. This function requires that the XmNscrollingPolicy of the
       ScrolledWindow widget be set to XmAUTOMATIC.

       scrollw_widget
		 Specifies the ID of the ScrolledWindow widget whose work area window contains an obscured descendant.

       widget	 Specifies the ID of the widget to be made visible.

       left_right_margin
		 Specifies the margin to establish between the left or right edge of the widget and the associated edge  of  the  viewport.   This
		 margin is established only if the widget must be moved horizontally to make it visible.

       top_bottom_margin
		 Specifies  the  margin  to  establish between the top or bottom edge of the widget and the associated edge of the viewport.  This
		 margin is established only if the widget must be moved vertically to make it visible.

       For a complete definition of ScrolledWindow and its associated resources, see XmScrolledWindow(3)

RELATED

       XmScrolledWindow(3).

														     XmScrollVisible(library call)
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