When easyrsa in in $PATH, $0 does not contain a directory, resulting
in an invalid prog_vars. prog_vars is used to get default vars
location, if $EASYRSA_VARS_FILE, $EASYRSA_PKI/vars and $PWD/pki/vars
does not exist.
$0 is also used to set $EASYRSA the same way prog_vars is defined.
$EASYRSA/openssl-easyrsa.cnf is used to set $EASYRSA_SSL_CONF initial
content if missing.
$EASYRSA/x509-types is used to for extensions dir if $EASYRSA_EXT_DIR
and $EASYRSA_PKI/x509-types are not found. However, if vars already
needs changes, it is better to set $EASYRSA_EXT_DIR and file locations
there.
Normally a symlink to /usr/bin will be used to put easyrsa in $PATH.
Following $PATH and symlink allows easyrsa to be located in a more
standard dir like /usr/lib/easy-rsa/easyrsa and vars at
/usr/{lib,libexec,share}/easyrsa/vars, which could be a symlink to
/etc/easy-rsa/vars. vars can be easily appended with the default
distribution values.
With this patch, a system-wide easyrsa package could use this file
structure without patching easyrsa:
/etc/easy-rsa/openssl-easyrsa.cnf
/etc/easy-rsa/pki/
/etc/easy-rsa/vars
/usr/bin/easyrsa -> /usr/lib/easy-rsa/easyrsa
/usr/lib/easy-rsa/easyrsa
/usr/lib/easy-rsa/openssl-easyrsa.cnf
/usr/lib/easy-rsa/vars -> /etc/easy-rsa/vars
/usr/lib/easy-rsa/x509-types
If following symlink fails (win32), the previous behavior is used.
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
52befc623f