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Accepted
Chris
Asked: 2018-10-07 07:51:32 +0800 CST

Grepping 'nginx -t' for a result

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Strangely enough this wont work for me.

nginx -t | grep -c 'successful' | awk '{if ($0==0) print "not found"; else if ($0>0) print "found"}'

It returns a not found even though the result is as follows:

nginx: [warn] conflicting server name "xxx.co.za" on 0.0.0.0:80, ignored
nginx: [warn] conflicting server name "xxx.co.za" on 0.0.0.0:443, ignored
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
not found

Even a simple grep doesn't do whats expected..

(nginx -t | grep -q 'successful') && echo "Yes" || echo "Nope"

Any idea how I can check if the nginx -t command is successful or not?

nginx

1 Answers

  1. Best Answer

    By the exit value of the nginx command, 0 if success. 

    root@nginx-1-vm:~# nginx -t && printf "Valid\n" || printf "Error\n"
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
Valid
root@nginx-1-vm:~# mv /etc/nginx/nginx.conf /tmp
root@nginx-1-vm:~# nginx -t && printf "Valid\n" || printf "Error\n"
nginx: [emerg] open() "/etc/nginx/nginx.conf" failed (2: No such file or directory)
nginx: configuration file /etc/nginx/nginx.conf test failed
Error

    Better than grep the output, as the messages could be localized or otherwise changed in the future.

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