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Full Discussion: Frequency of Words in a File, sed script from 1980
Top Forums Shell Programming and Scripting Frequency of Words in a File, sed script from 1980 Post 302977009 by RudiC on Monday 11th of July 2016 03:45:55 AM
Old 07-11-2016
Did you follow the instruction? And run the executable script with an adequate parameter?In bourne compatible shells, the ${1:-25} expands to the first positional parameter's contents or - if missing - to 25; c.f. man bash:
Quote:
${parameter:-word} Use Default Values.
With no parameter given, I get the same error message as you do, as sed can't cope with a 25 as the sole "command". With a first positional parameter of e.g. 1,15!d, above script will print the 15 topmost words in the text presented.


I'm a bit surprised that script should have ever run with no parameters given.
 

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shift

SHIFT(P)						     POSIX Programmer's Manual							  SHIFT(P)

NAME

       shift - shift positional parameters

SYNOPSIS

       shift [n]

DESCRIPTION

       The  positional	parameters  shall  be shifted. Positional parameter 1 shall be assigned the value of parameter (1+n), parameter 2 shall be
       assigned the value of parameter (2+n), and so on. The parameters represented by the numbers "$#" down to "$#-n+1" shall be unset,  and  the
       parameter '#' is updated to reflect the new number of positional parameters.

       The  value  n  shall  be  an unsigned decimal integer less than or equal to the value of the special parameter '#' .  If n is not given, it
       shall be assumed to be 1. If n is 0, the positional and special parameters are not changed.

OPTIONS

       None.

OPERANDS

       See the DESCRIPTION.

STDIN

       Not used.

INPUT FILES

       None.

ENVIRONMENT VARIABLES

       None.

ASYNCHRONOUS EVENTS

       Default.

STDOUT

       Not used.

STDERR

       The standard error shall be used only for diagnostic messages.

OUTPUT FILES

       None.

EXTENDED DESCRIPTION

       None.

EXIT STATUS

       The exit status is >0 if n>$#; otherwise, it is zero.

CONSEQUENCES OF ERRORS

       Default.

       The following sections are informative.

APPLICATION USAGE

       None.

EXAMPLES

	      $ set a b c d e
	      $ shift 2
	      $ echo $*
	      c d e

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       Special Built-In Utilities

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and  the  original  IEEE
       and  The  Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained
       online at http://www.opengroup.org/unix/online.html .

IEEE
/The Open Group						       2003								  SHIFT(P)
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