auto import from //depot/cupcake/@135843
diff --git a/toolbox/rm.c b/toolbox/rm.c
new file mode 100644
index 0000000..bd66311
--- /dev/null
+++ b/toolbox/rm.c
@@ -0,0 +1,92 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <dirent.h>
+#include <limits.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+static int usage()
+{
+ fprintf(stderr,"rm [-rR] <target>\n");
+ return -1;
+}
+
+/* return -1 on failure, with errno set to the first error */
+static int unlink_recursive(const char* name)
+{
+ struct stat st;
+ DIR *dir;
+ struct dirent *de;
+ int fail = 0;
+
+ /* is it a file or directory? */
+ if (lstat(name, &st) < 0)
+ return -1;
+
+ /* a file, so unlink it */
+ if (!S_ISDIR(st.st_mode))
+ return unlink(name);
+
+ /* a directory, so open handle */
+ dir = opendir(name);
+ if (dir == NULL)
+ return -1;
+
+ /* recurse over components */
+ errno = 0;
+ while ((de = readdir(dir)) != NULL) {
+ char dn[PATH_MAX];
+ if (!strcmp(de->d_name, "..") || !strcmp(de->d_name, "."))
+ continue;
+ sprintf(dn, "%s/%s", name, de->d_name);
+ if (unlink_recursive(dn) < 0) {
+ fail = 1;
+ break;
+ }
+ errno = 0;
+ }
+ /* in case readdir or unlink_recursive failed */
+ if (fail || errno < 0) {
+ int save = errno;
+ closedir(dir);
+ errno = save;
+ return -1;
+ }
+
+ /* close directory handle */
+ if (closedir(dir) < 0)
+ return -1;
+
+ /* delete target directory */
+ return rmdir(name);
+}
+
+int rm_main(int argc, char *argv[])
+{
+ int ret;
+ int i = 1;
+ int recursive = 0;
+
+ if (argc < 2)
+ return usage();
+
+ /* check if recursive */
+ if (argc >=2 && (!strcmp(argv[1], "-r") || !strcmp(argv[1], "-R"))) {
+ recursive = 1;
+ i = 2;
+ }
+
+ /* loop over the file/directory args */
+ for (; i < argc; i++) {
+ int ret = recursive ? unlink_recursive(argv[i]) : unlink(argv[i]);
+ if (ret < 0) {
+ fprintf(stderr, "rm failed for %s, %s\n", argv[i], strerror(errno));
+ return -1;
+ }
+ }
+
+ return 0;
+}
+