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Full Discussion: Alternative for goto
Top Forums Shell Programming and Scripting Alternative for goto Post 302866543 by kumaar1986 on Tuesday 22nd of October 2013 08:43:35 AM
Old 10-22-2013
Alternative for goto
Code:
 
#!/bin/sh
label:
echo sql poll
 v=`sqlplus -s <<!
 HR/HR
 set pages 0 echo off feed off
 select distinct status from
 emp
 where
 id=5;
 !
 `
echo $v;
echo it comes here after false
if [ "$v" -eq 4 ]
then
echo if condition true
sqlplus -l scott/tiger <<EOF
select * from department;
EXIT
EOF
else
   sleep 30;
   goto label
fi


If the condition fails in the above script then it needs to sleep for 30 seconds then go to label and poll the database tabel. I read there is no goto in bourne shell so i tried to use other options like funtions but i could not finish this task. can someone help me to fix this. I tried like below . I am a absolute beginner in shell script so couldnot catch the concepts well.Thanks for your help in advance

Code:
 
#!/bin/sh
start(){
echo sql poll
 v=`sqlplus -s <<!
 HR/HR
 set pages 0 echo off feed off
 select distinct status from
 emp
 where
 id=5;
 !
 `
echo $v;
}
rval=start
if [ "$rval" -eq 4 ]
then
echo if condition true
sqlplus -l scott/tiger <<EOF
select * from department;
EXIT
EOF
else
   sleep 30;
   start
fi

 

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LEARN ABOUT ULTRIX

ppmtosixel

ppmtosixel(1)						      General Commands Manual						     ppmtosixel(1)

NAME

       ppmtosixel - convert a portable pixmap into DEC sixel format

SYNOPSIS

       ppmtosixel [-raw] [-margin] [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as input.  Produces sixel commands (SIX) as output.	The output is formatted for color printing, e.g. for a DEC
       LJ250 color inkjet printer.

       If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled.  A printer control header and a color assignment table
       begin the SIX file.  Image data is written in a compressed format by default.  A printer control footer ends the image file.

OPTIONS

       -raw   If  specified,  each  pixel  will  be explicitly described in the image file.  If -raw is not specified, output will default to com-
	      pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands.  A raw file is often an order	of  magni-
	      tude larger than a compressed file and prints much slower.

       -margin
	      If  -margin  is not specified, the image will be start at the left margin (of the window, paper, or whatever).  If -margin is speci-
	      fied, a 1.5 inch left margin will offset the image.

PRINTING

       Generally, sixel files must reach the printer unfiltered.  Use the lpr -x option or cat filename > /dev/tty0?.

BUGS

       Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion.  If the original PPM maxval was
       greater	than  100,  rescaling  also reduces the image depth.  While the actual RGB values from the ppm file are more or less retained, the
       color palette of the LJ250 may not match the colors on your screen.  This seems to be a printer limitation.

SEE ALSO

       ppm(5)

AUTHOR

       Copyright (C) 1991 by Rick Vinci.

								   26 April 1991						     ppmtosixel(1)
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