add --sysroot option

--root is not sufficient to properly operate on a mounted guest system.
Using --root still uses the host system's configuration and there is no
way to correctly use the guest configuration without manually modifying
any Include directives.  --sysroot provides an easier way to operate on
a guest system by chrooting immediately after option parsing before
configuration parsing or performing any operations.  It is currently
limited to the root user, but that's enough for restoring a guest system
to a working state, which is the primary intended use case.

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/pacman/util.c b/src/pacman/util.c
index 64ea8c57..ae8a74d3 100644
--- a/src/pacman/util.c
+++ b/src/pacman/util.c
@@ -103,6 +103,9 @@ int trans_release(void)
 
 int needs_root(void)
 {
+	if(config->sysroot) {
+		return 1;
+	}
 	switch(config->op) {
 		case PM_OP_DATABASE:
 			return !config->op_q_check;