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<== Date ==> <== Thread ==>
Subject: Windows paths inside iocShell
From: Ralph Lange via Core-talk <core-talk at aps.anl.gov>
To: EPICS Core Talk <core-talk at aps.anl.gov>
Date: Wed, 14 Apr 2021 17:44:59 +0200
Question:

Under Windows, using system environment variables containing paths in the iocShell doesn't work, because backslash characters (\) in the path are interpreted as the first character of an escape sequence.

Example. Trying to set a location inside %AppData% by doing
epicsEnvSet FOO ${APPDATA}/foobar

creates an invalid path, because the backslashes disappear:
C:UsersnobodyAppDataRoaming/foobar  

Shouldn't backslashes rather be treated verbatim here?
The expansion is done by macLib before the epicsEnvSet command is being called. Do we need a modifier that allows verbatim macro replacement? The getenv() used by macLib converts '\' to '\\' when reading from the environment, but macLib seems to resolve (discard) the "escape sequence" further down in the process.

Cheers,
~Ralph

Replies:
Re: [EXTERNAL] Windows paths inside iocShell Kasemir, Kay via Core-talk
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