How can I collapse this bash command line into an awk statement?

问题

I've created an awk script and use it like this:

# grep -E "[PM][IP][DO][:S]" file.txt | awk-script

How can I modify the awk script to include the effort of the grep command (which is searching for either "PID:" or "MPOS"?

awk-script is:

#!/usr/bin/awk -f
/Sleeve/  {
        printf("%8d, %7d, %7.2f, %7.2f, %7.2f\n", $5, $6, $7, $30, $31)
}
/Ambient/ {
        printf("%8d, %7d,,,, %7.2f, %7.2f\n", $5, $6, $7, $8)
}
/MPOS:/ {
        printf("%8d, %7d,,,,,, %5d, %5d\n", $4, $5, $2, $3)
}

回答1:

If you just want to search for PID: or MPOS, you can say that if you don't find them in the line, you want to skip following rules:

#!/usr/bin/awk -f

!/PID:|MPOS/ { 
        next 
}

/Sleeve/  {
        printf("%8d, %7d, %7.2f, %7.2f, %7.2f\n", $5, $6, $7, $30, $31)
}
/Ambient/ {
        printf("%8d, %7d,,,, %7.2f, %7.2f\n", $5, $6, $7, $8)
}
/MPOS:/ {
        printf("%8d, %7d,,,,,, %5d, %5d\n", $4, $5, $2, $3)
}

回答2:

I tried litb's answer in busybox (on Ubuntu in Bash) and it worked for me. For testing, I used the following shebang to match where I have symbolic links to busybox:

#!/home/username/busybox/awk -f

And ran the test using:

./awk-script file.txt

I also ran the test under busybox sh (with PATH=/home/username/busybox:$PATH although not necessary for this) and it worked there.

When you say "I still have grief." what does that mean? Are you getting error messages or incorrect results?

By the way, unless you're searching for all permutations of the characters, you can do your grep like this:

grep -E "(PID:|MPOS)" file.txt

来源：https://stackoverflow.com/questions/1510175/how-can-i-collapse-this-bash-command-line-into-an-awk-statement

标签

bash

awk

grep