How to use environment variable in log4cpp property file

Question

I am using log4cpp for my C++ project. What I need is to generate log files in custom locations instead of current directory. For that, I have set some environment variables for log file path. The problem is how can I use this environment variables in log4cpp property file so that the log files are generated in that locations.

I tried various options like $(ENV_VAR), ${ENV_VAR}, %ENV_VAR% but none are working.

Thanks, Hemant

a line like `log4cpp.appender.logfile.fileName=${TEMP}\MyProgram.log` used to work with `log4cpp` for me on Windows — AntonK, Feb 04 '20 at 17:16

score 1 · Answer 1 · answered Jun 29 '17 at 09:10

1

use ${sys:ENV_VAR} instead of ${ENV_VAR}

reference http://logging.apache.org/log4j/2.x/manual/lookups.html

answered Jun 29 '17 at 09:10

ForwardIterator

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5

using ${ENV_VAR} on Linux worked. But on Windows, it is not working. – Hemant Jun 29 '17 at 11:06

How to use environment variable in log4cpp property file

1 Answers1