How do you change directories in a c program using environmental variables?

Question

I tried using setenv("CWD", path, 1), but it keeps saying implicit declaration even though I included stdlib.h.

Answer 1

Assuming the compiler warns about the "implicit declaration" of setenv() and not of path you need to make the prototype to setenv() available to the compiler by #defineing one of the following:

_BSD_SOURCE

or

_POSIX_C_SOURCE >= 200112L

or

_XOPEN_SOURCE >= 600

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Also you cannot set the current work directory by setting the environment variable CWD. Use chdir() instead.