envdir — runs another program with environment modified according to files in a specified directory.
envdir {d} {child}
d is a single argument.
child consists of one or more arguments.
envdir sets various environment variables as specified by files in the directory named .
It then runs dchild.
If contains a file named d whose first line is st, envdir removes an environment variable named if one exists, and then adds an environment variable named s with value st.
The name must not contain s=.
Spaces and tabs at the end of t are removed.
Nulls in t are changed to newlines in the environment variable.
If the file is completely empty (0 bytes long), envdir removes an environment variable named s if one exists, without adding a new variable.
s
envdir exits 111 if it has trouble reading d, if it runs out of memory for environment variables, or if it cannot run child.
Otherwise its exit code is the same as that of child.