Decrementing numbers


 
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# 8  
Quote:
Originally Posted by Scrutinizer
On Solaris use /usr/xpg4/bin/awk rather than awk
Do you mean to use this as the shell interpreter?

#!usr/xpg4/bin/awk

I did this and it nows interprets the script name as a command (which it cna't find)
# 9  
No, I mean to use /usr/xpg4/bin/awk wherever you would use awk if you are using Solaris.
# 10  
Quote:
Originally Posted by Scrutinizer
No, I mean to use /usr/xpg4/bin/awk wherever you would use awk if you are using Solaris.
It doesn't seem to like that. When I execute the script "CHANGE_TEST_NUMS" I get the following error:

/home/test/bin/CHANGE_TEST_NUMS: usr/xpg4/bin/awk: No such file or directory
# 11  
If you use awk in the shebang you need to use awk -f, but as I indicated in red, you left out the leading slash in the path to awk, so it cannot be found...
# 12  
Quote:
Originally Posted by Scrutinizer
If you use awk in the shebang you need to use awk -f, but as I indicated in red, you left out the leading slash in the path to awk, so it cannot be found...
Ok the error is gone now but the script does nothing. I run my script on a text file called a.txt:

bash-2.03$ CHANGE_TEST_NUMS a.txt

the script syntax is:

Code:
#!/bin/bash -f
#
echo $1
/usr/xpg4/bin/awk -v start=5 -v end=9 '!($1 >= start && $1 <= end){
if($1 ~ /[0-9]{1,}/ && $1>end)
 sub(/[0-9]{1,}/,($1-(end-start)-1))
print
}' inputfile

However the script does nothing to the text file a.txt
# 13  
  1. With bash, you should not use -f in the shebang. Leave that out
  2. "inputfile" should be the actual name of the input file, unless
  3. If you want to specify the file on the command line like that you need to use shell positional parameters ($1, $2 ,etc) to feed it into awk..
  4. You need to call the script as ./script unless its directory is in your PATH variable
# 14  
Quote:
Originally Posted by Scrutinizer
  1. With bash, you should not use -f in the shebang. Leave that out
  2. "inputfile" should be the actual name of the input file, unless
  3. If you want to specify the file on the command line like that you need to use shell positional parameters ($1, $2 ,etc) to feed it into awk..
  4. You need to call the script as ./script unless its directory is in your PATH variable
Thanks, I have the data manipulation part working. However I need to save this to a new file. I'm using the sed program to created a new file called a_mod.txt (the original is called a.txt). Also I'm piping the output to this new file. Here's my code:

Code:
#!/bin/bash
#
OUTPUT_FILENAME = `echo $1 | sed 's/.txt/_mod.txt/'`

/usr/xpg4/bin/awk -v start=4 -v end=5 '!($1 >= start && $1 <= end){
if($1 ~ /[0-9]{1,}/ && $1>end)
 sub(/[0-9]{1,}/,($1-(end-start)-1))
print
}' $1 > $OUTPUT_FILENAME

I'm getting the following error.

/home/test/bin/CHANGE_TEST_NUMS: OUTPUT_FILENAME: command not found
/home/test/bin/CHANGE_TEST_NUMS: $OUTPUT_FILENAME: ambiguous redirect
 

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