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Top Forums Shell Programming and Scripting Need help with Unix assignmet Post 302138214 by barbus on Sunday 30th of September 2007 11:00:52 AM
Old 09-30-2007
Need help with Unix assignmet

Hi i am a newbie to UNIX and i am undertaking a course, i have some exercises and one of them is as follows:

Create a file with x amount of lines in it, the content of your choice.
Write a script named 'firstline' that takes two arguments. The first being a line of text, the second being your newly created file. The script should take the first argument and insert it into the very top (the first line) of the file named in your second argument.

Assume the file is called “textfile1” and has the contents
Text one
Text two
Text three
.
.
.
.
Text n

How do i redirect a variable that hold text (or a string of characters) to the 1st line of the file, without effect the current 1st line.

The variable doesn’t need any input from the user, so it assume it will be as follows:
Mytext=”hello people” this being the 1st argument $1

Not I am NOT permitted to use either SED or AWK.

i am not looking for the full answer please, just a hint on how to start this, i am trying to learn after all Smilie

Any help will be greatly appreciated.

Last edited by barbus; 09-30-2007 at 12:13 PM..
 
Test Your Knowledge in Computers #970
Difficulty: Medium
The Android operating system includes the Linux kernel.
True or False?

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XmCreateScrolledText(3X)												  XmCreateScrolledText(3X)

NAME
XmCreateScrolledText - The TextScrolledText convenience creation function SYNOPSIS
#include <Xm/Text.h> Widget XmCreateScrolledText (parent, name, arglist, argcount) Widget parent; String name; ArgList arglist; Cardinal argcount; DESCRIPTION
XmCreateScrolledText creates an instance of a Text widget that is contained within a ScrolledWindow. All ScrolledWindow subarea widgets are automatically created by this function. The ID returned by this function is that of the Text widget. Use this ID for all normal Text operations, as well as those that are relevant for the ScrolledText widget. The Text widget defaults to single-line text edit; therefore, no ScrollBars are displayed. The Text resource XmNeditMode must be set to XmMULTI_LINE_EDIT to display the ScrollBars. The results of placing a Text widget inside a ScrolledWindow when the Text's XmNeditMode is XmSINGLE_LINE_EDIT are undefined. All arguments to either the Text or the ScrolledWindow widget can be specified at creation time using this function. Changes to initial position and size are sent only to the ScrolledWindow widget. Other resources are sent to the Text or the ScrolledWindow widget as appro- priate. This function forces the following initial values for ScrolledWindow resources: XmNscrollingPolicy is set to XmAPPLICATION_DEFINED. XmNvi- sualPolicy is set to XmVARIABLE. XmNscrollBarDisplayPolicy is set to XmSTATIC. XmNshadowThickness is set to 0. To obtain the ID of the ScrolledWindow widget associated with the ScrolledText, use the Xt Intrinsics XtParent function. The name of the ScrolledWindow created by this function is formed by concatenating the letters SW onto the end of the name specified in the parameter list. Specifies the parent widget ID Specifies the name of the created widget Specifies the argument list Specifies the number of attribute/value pairs in the argument list (arglist) For a complete definition of Text and its associated resources, see XmText(3X). RETURN VALUE
Returns the Text widget ID. SEE ALSO
XmScrolledWindow(3X), XmText(3X) XmCreateScrolledText(3X)

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