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When PATH is unset or empty, use the system default, to be consistent with GNU/Linux and with POSIX. If there is no system default do not default to "." as that can be dangerous. * src/callproc.c (init_callproc_1, init_callproc): Default PATH to the null pointer, not the empty string. * src/emacs.c (default_PATH): New function. (find_emacs_executable, decode_env_path): Be consistent with POSIX and with glibc about what to do when PATH is unset or empty. |
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