Use COMSPEC env var, not hard-coded CMD.EXE path.

It is with some reluctance I make this change, due to the security
implications of relying on environment variables. But we can't have a
hard-coded path.

* winsup/cygwin/include/paths.h (_PATH_CMDEXE): Macro removed.

* winsup/cygwin/spawn.cc (av::setup): Use COMSPEC environment
variable instead of hard-coded path. If missing, bail with
errno set to EOPNOTSUPP.

* winsup/cygwin/syscalls.cc (system): Use COMSPEC environment
variable. If missing, return -1.
(getusershell): Eliminate static array of shell names. If
shell_index is zero, return value of COMSPEC env var,
if it exists, and increment shell_index to 1.
(popen): Use COMSPEC and if that is missing, set errno to
EOPNOTSUPP and return NULL.

0 files changed, 0 insertions, 0 deletions