This command is a mix of s6-envdir and importas program. It reads files containing variable assignments on the given directory, adds the variables to the environment, then executes a program.
66-envfile [ -h ] [ -f file ] [ -l ] dir prog
This tool expects to find a regular file(s) in dir containing one or multiple key=value pair. For earch files found, it will parse the file, import the key=value then execs prog with the modified environment.
file is a text file containing lines of the form key = value.Whitespace is permitted before and after key, and before or after value, Quoting is also possible.
Empty lines, or lines containing only whitespace, are ignored. Lines beginning with # (possibly after some whitespace) are ignored (and typically used for comments). Comments are not possible at the end of lines: key = value # comment is not a valid comment.
Empty value is not permitted.
If key begin by a '!' character: !key=value the key will be removed from the environment after the substitution.
#!/usr/bin/execlineb -P fdmove -c 2 1 66-envfile -f ntpd /etc/66/conf/ foreground { mkdir -p -m 0755 ${RUNDIR} } execl-cmdline -s { ntpd ${CMD_ARGS} }/etc/66/conf/ntpd file contain :
!RUNDIR=/run/openntpd !CMD_ARGS=-d -s
66-envfile reads /etc/66/conf/ntpd file, parses the file, import the variable RUNDIR and CMD_ARGS, replaces the ${RUNDIR} and ${CMD_ARGS} by the corresponding values, unexport the variable then execs the ntpd commandline.
The strict equivalent with s6-envdir and importas command will be:
#!/usr/bin/execlineb -P fdmove -c 2 1 s6-envdir /etc/66/conf importas -u RUNDIR RUNDIR importas -u CMD_ARGS CMD_ARGS foreground { mkdir -p -m 0755 ${RUNDIR} } execl-cmdline -s { ntpd ${CMD_ARGS} }
where /etc/66/conf directory contains two named files RUNDIR and CMD_ARGS written with /run/openntpd and -d -s respectively.