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Full Discussion: The Start Of A Simple Audio Scope Shell Script...
Top Forums Shell Programming and Scripting The Start Of A Simple Audio Scope Shell Script... Post 302788823 by Corona688 on Tuesday 2nd of April 2013 02:14:07 PM
Old 04-02-2013
Actually, there are some obvious things still.

Code:
	printf "CURRENT COMMANDS AVAILABLE:-\n\n"
	printf "<CR> ................................................. Reruns the scan(s) again.\n"
	printf "RUN<CR> ......................... Reruns the scan(s), always with real captures.\n"
	printf "QUIT<CR> .................................................... Quits the program.\n"
	printf "HELP<CR> ................................................ This help as required.\n"
	printf "HOLD<CR> ........................................ Switch to pseudo-storage mode.\n"
	printf "DEMO<CR> .................................. Switch capture to default DEMO mode.\n"
	printf "DSP<CR> ................................. Switch capture to Linux /dev/dsp mode.\n"
	printf "SOX<CR> .................. Switch capture to multi-platform SOund eXchange mode.\n"
	printf "ONE<CR> ......................................... Sets the number of scans to 1.\n"
	printf "TEN<CR> ........................................ Sets the number of scans to 10.\n"
	printf "HUNDRED<CR> ................................... Sets the number of scans to 100.\n"
	printf "VER<CR> ................. Displays the version number inside the status windows.\n"
	printf "TBVAR<CR> ............ Set up uncalibrated user timebase offset and jump points.\n"
	printf "FASTEST<CR> .................. Set all modes to the fastest possible scan speed.\n"
	printf "1mS<CR> ............ (Not available in DEMO mode.) Set scanning rate to 1mS/DIV.\n"
	printf "10mS<CR> ............. (Inaccurate in DEMO mode.) Set scanning rate to 10mS/DIV.\n"
	printf "100mS<CR> ...................................... Set scanning rate to 100mS/DIV.\n"
	printf "SHIFT<CR> ............ Set the vertical position from -4 to +4 to the mid-point.\n"
	printf "DRAW<CR> .......... Connect up each vertical plot to give a fully lined display.\n"
	printf "\n"

can become:

Code:
cat <<EOF
CURRENT COMMANDS AVAILABLE:-

<CR> ................................................. Reruns the scan(s) again.
RUN<CR> ......................... Reruns the scan(s), always with real captures.
QUIT<CR> .................................................... Quits the program.
HELP<CR> ................................................ This help as required.
HOLD<CR> ........................................ Switch to pseudo-storage mode.
DEMO<CR> .................................. Switch capture to default DEMO mode.
DSP<CR> ................................. Switch capture to Linux /dev/dsp mode.
SOX<CR> .................. Switch capture to multi-platform SOund eXchange mode.
ONE<CR> ......................................... Sets the number of scans to 1.
TEN<CR> ........................................ Sets the number of scans to 10.
HUNDRED<CR> ................................... Sets the number of scans to 100.
VER<CR> ................. Displays the version number inside the status windows.
TBVAR<CR> ............ Set up uncalibrated user timebase offset and jump points.
FASTEST<CR> .................. Set all modes to the fastest possible scan speed.
1mS<CR> ............ (Not available in DEMO mode.) Set scanning rate to 1mS/DIV.
10mS<CR> ............. (Inaccurate in DEMO mode.) Set scanning rate to 10mS/DIV.
100mS<CR> ...................................... Set scanning rate to 100mS/DIV.
SHIFT<CR> ............ Set the vertical position from -4 to +4 to the mid-point.
DRAW<CR> .......... Connect up each vertical plot to give a fully lined display.

EOF

And the same for your graticule, nearly:


Code:
GRAT_HEADER=$'\x1B'"[0;37;44mDISPLAY"$'\x1B'"[0;36;44m"

cat <<EOF
       +-------+-------+-------+---[${GRAT_HEADER}]---+-------+-------+--------+       
       |       |       |       |       +       |       |       |        |       
       |       |       |       |       +       |       |       |        |       
       |       |       |       |       +       |       |       |        |       
       +-------+-------+-------+-------+-------+-------+-------+--------+ <     
       |       |       |       |       +       |       |       |        |       
       |       |       |       |       +       |       |       |        |       
       |       |       |       |       +       |       |       |        |       
     0 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+--+ <     
       |       |       |       |       +       |       |       |        |       
       |       |       |       |       +       |       |       |        |       
       |       |       |       |       +       |       |       |        |       
       +-------+-------+-------+-------+-------+-------+-------+--------+ <     
       |       |       |       |       +       |       |       |        |       
       |       |       |       |       +       |       |       |        |       
       |       |       |       |       +       |       |       |        |       
       |       |       |       |       +       |       |       |        |       
       +-------+-------+-------+-------+-------+-------+-------+--------+ 
EOF

Note that you cannot indent the ending EOF, it must be at the very beginning of the line. Don't put comments on the same line after it either.

And the same thing again to create your entire config file in one command instead of 9.

Also, you might find it interesting to know you can put multiple lines in a string.

Code:
A="b
c
d
e
f"
echo "$A"

No more 'printf \n' needed.

Also, there are two different places in your code where you write an entire config file. Why not make a function, and just call it in two places?
Last edited by Corona688; 04-02-2013 at 03:22 PM..
 

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