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Full Discussion: BASH arrays and variables of variables in C++
Top Forums Shell Programming and Scripting BASH arrays and variables of variables in C++ Post 302877472 by neutronscott on Sunday 1st of December 2013 03:46:05 PM
Old 12-01-2013
Code:
mute@thedoctor:~/temp/frad$ ./makecode < script > code.cpp
mute@thedoctor:~/temp/frad$ g++ code.cpp
mute@thedoctor:~/temp/frad$ ./a.out
VAR0 = good
VAR1 = excellent
mute@thedoctor:~/temp/frad$ cat makecode
#!/bin/sh

cat << '__EOF__'
#include <iostream>
#include <cstdlib>
#include <unistd.h>
using namespace std;

#define SHELL "/bin/bash"

const char shellcode[] = {
"\
__EOF__

sed -e 's/"/\\"/g' -e 's/$/\\n\\/'

cat << '__EOF__'
"
};

int main() {
        return execl(SHELL, SHELL, "-c", shellcode, NULL);
}
__EOF__

 

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LEARN ABOUT DEBIAN

ossmix

ossmix(1)							 OSS User Commands							 ossmix(1)

NAME

       ossmix - Open Sound System command-line mixer program.

SYNOPSIS

       ossmix [-d <dev#>] [-achqD] [control name] [value]

DESCRIPTION

       ossmix is a simple command-line mixer utility that is used to display the mixer settings of physical and virtual audio devices. OSS version
       4 has an extended mixer API which supports some device specific features that may not available using other mixer applications.

OPTIONS

       -D     Display device information.

       -a     Dump mixer settings for all mixers (normal format).

       -c     Dump mixer settings for all mixers (command format).

       -h     Display usage information.

       -q     Quiet mode.

       -v[1|2]
	      Verbose mode. -v2 prints more detailed infoamation than -v1.

       ctrl# value
	      Change value of a mixer control.

       <no arg>
	      Display current/possible settings.

USAGE

       ossmix without any arguments displays the current settings of the default mixer device (usually the motherboard sound chip). This  printout
       can  also  be used to find out the supported control names and their possible values. Currently all controls accept an ON/OFF value, a mono
       value (0 to 100) or a stereo value (left:right where both channel volumes can be between 0 and 100). The value can also be expressed  in  a
       relative  form  (e.g.  +1  to  add 1 to the previous volume). An ON/OFF control can also receive a TOGGLE value. If a control has a name in
       quotes following the normal output, than the name can be used instead of the control when setting a value.

       The following is a sample printout produced by ossmix:

	       Selected mixer 0/Creative AudioPCI
	       Known controls are:
	       vol <both/leftvol>[:<rightvol>] (currently 50:50)
	       pcm <both/leftvol>[:<rightvol>] (currently 50:50)
	       speaker <monovol> (currently 21)
	       line <both/leftvol>[:<rightvol>] (currently 32:32)
	       line.rec ON|OFF (currently OFF)
	       mic <monovol> (currently 16)
	       mic.rec ON|OFF (currently ON)
	       cd <both/leftvol>[:<rightvol>] (currently 100:100)
	       cd.rec ON|OFF (currently OFF)
	       pcm2 <both/leftvol>[:<rightvol>] (currently 75:75)
	       line1 <both/leftvol>[:<rightvol>] (currently 32:32)
	       line1.rec ON|OFF (currently OFF)
	       line2 <monovol> (currently 32)
	       line2.rec ON|OFF (currently OFF)
	       line3 <monovol> (currently 0)
	       line3.rec ON|OFF (currently OFF)
	       mic.micboost ON|OFF (currently ON)
	       mic.micbias ON|OFF (currently ON)
	       mute.pcmmute ON|OFF (currently OFF)
	       mute.pcm2mute ON|OFF (currently OFF)
	       mute.micmute ON|OFF (currently OFF)
	       mute.cdmute ON|OFF (currently OFF)
	       mute.linemute ON|OFF (currently OFF)
	       mute.line1mute ON|OFF (currently OFF)
	       mute.line2mute ON|OFF (currently OFF)
	       mute.line3mute ON|OFF (currently OFF)

SELECTING MIXER DEVICE

       It's possible to select the mixer device by using the -d<mixernumber> command line argument. This argument (when used) should be the  first
       one  on	the  command  line. By default the mixer number 0 will be accessed.  To find the available mixer devices, type ossinfo -x and look
       under the Mixers heading for available mixer devices.

CHANGING MIXER SETTINGS

       Changing the values is done just like with the original "mixer" applet.	For example:

	       ossmix pcm 50:60

       The above sets the pcm control (audio playback volume) so that the left channel volume is 50 and the right channel volume is 60. With  just
       "ossmix pcm 50" the both channel volumes will be set to 50.

       In  addition  to  the  old  mixer there are now some (usually ON/OFF) settings.	These settings are device specific and don't work with all
       soundcards.  The easiest way to find them out is to start ossmix without command line arguments (other than -d#).

       Some control names contain a dot ("."). This dot is required when changing the value. For example: "ossmix -d0 mic.micboost ON".

EXAMPLES

       ossmix vol 50
	      Set the vol control volume to 50. If the pcm control is a stereo control, than both channels will be set to 50.

       ossmix vol 50:60
	      Set the vol control so that the left channel volume is 50 and the right channel volume is 60.

       ossmix vol +2
	      Raise vol volume by 2.

       ossmix -- vol +2:-2
	      Raise the left channel volume by 2, and lower right channel volume by 2.	The "--" is needed on some systems so that the "-2"  won't
	      be mistaken for a parameter.

       ossmix micboost ON
	      Set micboost to ON.

       ossmix micboost TOGGLE
	      Toggle micboost.

       ossmix mplayer +2
	      Raise mplayer volume by 2. This would only work if mplayer is using the virtual mixer.

FILES

       /usr/bin/ossmix

SEE ALSO

       ossdevlinks(1), ossxmix(1), savemixer(1)

AUTHOR

       4Front Technologies

								 16 December 2012							 ossmix(1)
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