Search pattern in awk - linux

Question

I want to create a script such that it checks the conditions:
Port string should be present in the file and if yes then it's value should be 20000.
The file should have a mention of sslkey, sslCert, ssl_cipher (The values against these strings/keys can be anything).
The attempt was made:
$ awk '/port|sslKey|sslCert|ssl_cipher/ {print $2,$3}' pkg.conf
port 20000
sslKey /usr/product/plat/etc/ssl/server.pem
sslCert /usr/product/plat/etc/ssl/server.cert
ssl_cipher ECDH+AES128:ECDH+AESGCM:ECDH+AES256:DH+AES:DH+AESGCM:DH+AES256:RSA+AES:RSA+AESGCM:!aNULL:!RC4:!MD5:!DSS:!3DES
The problem with the above command is even if one of the strings 'port|sslKey|sslCert|ssl_cipher' is missing even then it runs.
Could this be achieved using only a few lines of awk.
If any of the string/condition is missing then the output should display that condition and also the conditions those are met.

Answer 1

Considering Your details in questions here are input examples:
Correct:
$ cat pkg.conf
port 20000
sslKey /usr/product/plat/etc/ssl/server.pem
sslCert /usr/product/plat/etc/ssl/server.cert
ssl_cipher ECDH+AES128:ECDH+AESGCM:ECDH+AES256:DH+AES:DH+AESGCM:DH+AES256:RSA+AES:RSA+AESGCM:!aNULL:!RC4:!MD5:!DSS:!3DES
Wrong (port 18000 and missing sslCert):
$ cat pkg_wrong.conf
port 18000
sslKey /usr/product/plat/etc/ssl/server.pem
ssl_cipher ECDH+AES128:ECDH+AESGCM:ECDH+AES256:DH+AES:DH+AESGCM:DH+AES256:RSA+AES:RSA+AESGCM:!aNULL:!RC4:!MD5:!DSS:!3DES
AWK solution:
Correct pkg.conf. Returns 0 and outputs nothing:
$ awk '
/^port [0-9]+$/ { if ( $2 == 20000 ) isport=1; port=$2; }
/^sslKey .+$/ { issslKey=1; sslKey=$2; }
/^sslCert .+$/ { issslCert=1; sslCert=$2; }
/^ssl_cipher .+$/ { isssl_cipher=1; ssl_cipher=$2; }
END { if (isport && issslKey && issslCert && isssl_cipher) exit(0);
else { print("port " port); print("sslKey " sslKey); print("sslCert " sslCert); print("ssl_cipher " ssl_cipher); exit(1); }
}
' pkg.conf
Wrong pkg_wrong.conf (port 18000 and missing sslCert):
$ awk '
/^port [0-9]+$/ { if ( $2 == 20000 ) isport=1; port=$2; }
/^sslKey .+$/ { issslKey=1; sslKey=$2; }
/^sslCert .+$/ { issslCert=1; sslCert=$2; }
/^ssl_cipher .+$/ { isssl_cipher=1; ssl_cipher=$2; }
END { if (isport && issslKey && issslCert && isssl_cipher) exit(0);
else { print("port " port); print("sslKey " sslKey); print("sslCert " sslCert); print("ssl_cipher " ssl_cipher); exit(1); }
}
' pkg_wrong.conf
port 18000
sslKey /usr/product/plat/etc/ssl/server.pem
sslCert
ssl_cipher ECDH+AES128:ECDH+AESGCM:ECDH+AES256:DH+AES:DH+AESGCM:DH+AES256:RSA+AES:RSA+AESGCM:!aNULL:!RC4:!MD5:!DSS:!3DES