Handle root prefix in overwrite operations

The pacman --overwrite operation currently expects a path without
the root prefix specified.  This is unexpected, particularly
given our conflict error message reports the path with the root
prefix included.

This patch allows libalpm to overwrite files with the root prefix
specified.

Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 5 insertions, 4 deletions

diff --git a/lib/libalpm/conflict.c b/lib/libalpm/conflict.c
index 35946de5..716d0088 100644
--- a/lib/libalpm/conflict.c
+++ b/lib/libalpm/conflict.c
@@ -399,10 +399,11 @@ static alpm_pkg_t *_alpm_find_file_owner(alpm_handle_t *handle, const char *path
 	return NULL;
 }
 
-static int _alpm_can_overwrite_file(alpm_handle_t *handle, const char *path)
+static int _alpm_can_overwrite_file(alpm_handle_t *handle, const char *path, const char *rootedpath)
 {
 	return handle->trans->flags & ALPM_TRANS_FLAG_FORCE
-		|| _alpm_fnmatch_patterns(handle->overwrite_files, path) == 0;
+		|| _alpm_fnmatch_patterns(handle->overwrite_files, path) == 0
+		|| _alpm_fnmatch_patterns(handle->overwrite_files, rootedpath) == 0;
 }
 
 /**
@@ -468,7 +469,7 @@ alpm_list_t *_alpm_db_find_fileconflicts(alpm_handle_t *handle,
 					/* can skip file-file conflicts when forced *
 					 * checking presence in p2_files detects dir-file or file-dir
 					 * conflicts as the path from p1 is returned */
-					if(_alpm_can_overwrite_file(handle, filename)
+					if(_alpm_can_overwrite_file(handle, filename, path)
 							&& alpm_filelist_contains(p2_files, filename)) {
 						_alpm_log(handle, ALPM_LOG_DEBUG,
 							"%s exists in both '%s' and '%s'\n", filename,
@@ -675,7 +676,7 @@ alpm_list_t *_alpm_db_find_fileconflicts(alpm_handle_t *handle,
 
 			/* skip file-file conflicts when being forced */
 			if(!S_ISDIR(lsbuf.st_mode)
-					&& _alpm_can_overwrite_file(handle, filestr)) {
+					&& _alpm_can_overwrite_file(handle, filestr, path)) {
 				_alpm_log(handle, ALPM_LOG_DEBUG,
 							"conflict with file on filesystem being forced\n");
 				resolved_conflict = 1;