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-rw-r--r--lib/dirtree.c79
1 files changed, 79 insertions, 0 deletions
diff --git a/lib/dirtree.c b/lib/dirtree.c
new file mode 100644
index 00000000..b64dfaf5
--- /dev/null
+++ b/lib/dirtree.c
@@ -0,0 +1,79 @@
+/* vi: set sw=4 ts=4 :*/
+/* dirtree.c - Functions for dealing with directory trees.
+ *
+ * Copyright 2007 Rob Landley <rob@landley.net>
+ */
+
+#include "toys.h"
+
+// Create a dirtree node from a path.
+
+struct dirtree *dirtree_add_node(char *path)
+{
+ struct dirtree *dt;
+ char *name;
+
+ // Find last chunk of name.
+
+ for (;;) {
+ name = strrchr(path, '/');
+
+ if (!name) name = path;
+ else {
+ if (*(name+1)) name++;
+ else {
+ *name=0;
+ continue;
+ }
+ }
+ break;
+ }
+
+ dt = xzalloc(sizeof(struct dirtree)+strlen(name)+1);
+ xstat(path, &(dt->st));
+ strcpy(dt->name, name);
+
+ return dt;
+}
+
+// Given a directory (in a writeable PATH_MAX buffer), recursively read in a
+// directory tree.
+//
+// If callback==NULL, allocate tree of struct dirtree and
+// return root of tree. Otherwise call callback(node) on each hit, free
+// structures after use, and return NULL.
+
+struct dirtree *dirtree_read(char *path, struct dirtree *parent,
+ int (*callback)(struct dirtree *node))
+{
+ struct dirtree *dt = NULL, **ddt = &dt;
+ DIR *dir;
+ int len = strlen(path);
+
+ if (!(dir = opendir(path))) perror_msg("No %s", path);
+
+ for (;;) {
+ struct dirent *entry = readdir(dir);
+ if (!entry) break;
+
+ // Skip "." and ".."
+ if (entry->d_name[0]=='.') {
+ if (!entry->d_name[1]) continue;
+ if (entry->d_name[1]=='.' && !entry->d_name[2]) continue;
+ }
+
+ snprintf(path+len, sizeof(toybuf)-len, "/%s", entry->d_name);
+ *ddt = dirtree_add_node(path);
+ (*ddt)->parent = parent;
+ if (callback) callback(*ddt);
+ if (entry->d_type == DT_DIR)
+ (*ddt)->child = dirtree_read(path, *ddt, callback);
+ if (callback) free(*ddt);
+ else ddt = &((*ddt)->next);
+ path[len]=0;
+ }
+
+ return dt;
+}
+
+