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Full Discussion: Shell Script average runtime
Homework and Emergencies Homework & Coursework Questions Shell Script average runtime Post 302563925 by Corona688 on Wednesday 12th of October 2011 12:08:52 PM
Old 10-12-2011
Does it really print that? Or does it actually print "0:00.00 (Elapsed)"? Be specific, if we make a program for the wrong input it won't give the right output.

You can probably make that simpler, by just feeding it "%F" instead of "%F (elapsed)", so it prints 0:00.00 per loop.

Then feed it through another loop so you can transform it into an expression to feed into bc.

Here's an incomplete example:
Code:
(

echo "(" # Start of bracket

while whatever
do
...
done | while IFS=":." read MIN SEC TENTH
do
        echo "( ( $MIN * 60 ) * $SEC) +"
done

echo "0 )" # End of bracket.  So we get ( A + B + C + D + 0 )
echo "/ 100" # Divide the whole mess by 100
 ) | bc


Last edited by Corona688; 10-12-2011 at 01:31 PM.. Reason: missing (. whoops!
 
Test Your Knowledge in Computers #374
Difficulty: Easy
In 2004, a new edition of the POSIX:2002 standard was released called POSIX:2004 (formally: IEEE Std 1003.1-2004).
True or False?

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getusershell(3C)					   Standard C Library Functions 					  getusershell(3C)

NAME
getusershell, setusershell, endusershell - get legal user shells SYNOPSIS
#include <unistd.h> char *getusershell(void); void setusershell(void); void endusershell(void); DESCRIPTION
The getusershell() function returns a pointer to a legal user shell as defined by the system manager in the file /etc/shells. If /etc/shells does not exist, the following locations of the standard system shells are used in its place: /bin/bash /bin/csh /bin/jsh /bin/ksh /bin/pfcsh /bin/pfksh /bin/pfsh /bin/sh /bin/tcsh /bin/zsh /sbin/jsh /sbin/pfsh /sbin/sh /usr/bin/bash /usr/bin/csh /usr/bin/jsh /usr/bin/ksh /usr/bin/pfcsh /usr/bin/pfksh /usr/bin/pfsh /usr/bin/sh /usr/bin/tcsh /usr/bin/zsh /usr/xpg4/bin/sh The getusershell() function opens the file /etc/shells, if it exists, and returns the next entry in the list of shells. The setusershell() function rewinds the file or the list. The endusershell() function closes the file, frees any memory used by getusershell() and setusershell(), and rewinds the file /etc/shells. RETURN VALUES
The getusershell() function returns a null pointer on EOF. BUGS
All information is contained in memory that may be freed with a call to endusershell(), so it must be copied if it is to be saved. SunOS 5.10 30 Aug 2004 getusershell(3C)

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