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-rw-r--r--include/fstree.h3
-rw-r--r--lib/Makemodule.am2
-rw-r--r--lib/fstree/node_from_path.c39
-rw-r--r--unpack/rdsquashfs.c35
4 files changed, 44 insertions, 35 deletions
diff --git a/include/fstree.h b/include/fstree.h
index 6c2ec0b..ea7cf88 100644
--- a/include/fstree.h
+++ b/include/fstree.h
@@ -265,4 +265,7 @@ tree_node_t *tree_node_list_sort(tree_node_t *head);
/* ASCIIbetically sort all sub directories recursively */
void tree_node_sort_recursive(tree_node_t *root);
+/* resolve a path to a tree node. Returns NULL on failure and sets errno */
+tree_node_t *fstree_node_from_path(fstree_t *fs, const char *path);
+
#endif /* FSTREE_H */
diff --git a/lib/Makemodule.am b/lib/Makemodule.am
index 6418568..23ce70d 100644
--- a/lib/Makemodule.am
+++ b/lib/Makemodule.am
@@ -3,7 +3,7 @@ libfstree_a_SOURCES += lib/fstree/fstree_sort.c lib/fstree/fstree_from_dir.c
libfstree_a_SOURCES += lib/fstree/gen_inode_table.c lib/fstree/get_path.c
libfstree_a_SOURCES += lib/fstree/node_stat.c lib/fstree/mknode.c
libfstree_a_SOURCES += lib/fstree/add_by_path.c lib/fstree/xattr.c
-libfstree_a_SOURCES += include/fstree.h
+libfstree_a_SOURCES += lib/fstree/node_from_path.c include/fstree.h
libfstree_a_CFLAGS = $(AM_CFLAGS)
libfstree_a_CPPFLAGS = $(AM_CPPFLAGS)
diff --git a/lib/fstree/node_from_path.c b/lib/fstree/node_from_path.c
new file mode 100644
index 0000000..e617059
--- /dev/null
+++ b/lib/fstree/node_from_path.c
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+#include "fstree.h"
+
+#include <string.h>
+#include <errno.h>
+
+tree_node_t *fstree_node_from_path(fstree_t *fs, const char *path)
+{
+ tree_node_t *n = fs->root;
+ const char *end;
+ size_t len;
+
+ while (path != NULL && *path != '\0') {
+ if (!S_ISDIR(n->mode)) {
+ errno = ENOTDIR;
+ return NULL;
+ }
+
+ end = strchrnul(path, '/');
+ len = end - path;
+
+ for (n = n->data.dir->children; n != NULL; n = n->next) {
+ if (strncmp(path, n->name, len) != 0)
+ continue;
+ if (n->name[len] != '\0')
+ continue;
+ break;
+ }
+
+ if (n == NULL) {
+ errno = ENOENT;
+ return NULL;
+ }
+
+ path = *end ? (end + 1) : end;
+ }
+
+ return n;
+}
diff --git a/unpack/rdsquashfs.c b/unpack/rdsquashfs.c
index 42bddff..4a0f12b 100644
--- a/unpack/rdsquashfs.c
+++ b/unpack/rdsquashfs.c
@@ -1,39 +1,6 @@
/* SPDX-License-Identifier: GPL-3.0-or-later */
#include "rdsquashfs.h"
-static tree_node_t *find_node(tree_node_t *n, const char *path)
-{
- const char *end;
- size_t len;
-
- while (path != NULL && *path != '\0') {
- if (!S_ISDIR(n->mode)) {
- errno = ENOTDIR;
- return NULL;
- }
-
- end = strchrnul(path, '/');
- len = end - path;
-
- for (n = n->data.dir->children; n != NULL; n = n->next) {
- if (strncmp(path, n->name, len) != 0)
- continue;
- if (n->name[len] != '\0')
- continue;
- break;
- }
-
- if (n == NULL) {
- errno = ENOENT;
- return NULL;
- }
-
- path = *end ? (end + 1) : end;
- }
-
- return n;
-}
-
int main(int argc, char **argv)
{
int status = EXIT_FAILURE;
@@ -76,7 +43,7 @@ int main(int argc, char **argv)
goto out_cmp;
if (opt.cmdpath != NULL) {
- n = find_node(fs.root, opt.cmdpath);
+ n = fstree_node_from_path(&fs, opt.cmdpath);
if (n == NULL) {
perror(opt.cmdpath);
goto out_fs;