[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/busybox/src/libbb/simplify_path.c b/ap/app/busybox/src/libbb/simplify_path.c
new file mode 100644
index 0000000..89dc5bd
--- /dev/null
+++ b/ap/app/busybox/src/libbb/simplify_path.c
@@ -0,0 +1,59 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * bb_simplify_path implementation for busybox
+ *
+ * Copyright (C) 2001 Manuel Novoa III <mjn3@codepoet.org>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+#include "libbb.h"
+
+char* FAST_FUNC bb_simplify_abs_path_inplace(char *start)
+{
+ char *s, *p;
+
+ p = s = start;
+ do {
+ if (*p == '/') {
+ if (*s == '/') { /* skip duplicate (or initial) slash */
+ continue;
+ }
+ if (*s == '.') {
+ if (s[1] == '/' || !s[1]) { /* remove extra '.' */
+ continue;
+ }
+ if ((s[1] == '.') && (s[2] == '/' || !s[2])) {
+ ++s;
+ if (p > start) {
+ while (*--p != '/') /* omit previous dir */
+ continue;
+ }
+ continue;
+ }
+ }
+ }
+ *++p = *s;
+ } while (*++s);
+
+ if ((p == start) || (*p != '/')) { /* not a trailing slash */
+ ++p; /* so keep last character */
+ }
+ *p = '\0';
+ return p;
+}
+
+char* FAST_FUNC bb_simplify_path(const char *path)
+{
+ char *s, *p;
+
+ if (path[0] == '/')
+ s = xstrdup(path);
+ else {
+ p = xrealloc_getcwd_or_warn(NULL);
+ s = concat_path_file(p, path);
+ free(p);
+ }
+
+ bb_simplify_abs_path_inplace(s);
+ return s;
+}