[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/xgetcwd.c b/ap/app/busybox/src/libbb/xgetcwd.c
new file mode 100644
index 0000000..71720d3
--- /dev/null
+++ b/ap/app/busybox/src/libbb/xgetcwd.c
@@ -0,0 +1,43 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * xgetcwd.c -- return current directory with unlimited length
+ * Copyright (C) 1992, 1996 Free Software Foundation, Inc.
+ * Written by David MacKenzie <djm@gnu.ai.mit.edu>.
+ *
+ * Special function for busybox written by Vladimir Oleynik <dzo@simtreas.ru>
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
+
+#include "libbb.h"
+
+/* Return the current directory, newly allocated, arbitrarily long.
+ Return NULL and set errno on error.
+ If argument is not NULL (previous usage allocate memory), call free()
+*/
+
+char* FAST_FUNC
+xrealloc_getcwd_or_warn(char *cwd)
+{
+#define PATH_INCR 64
+
+ char *ret;
+ unsigned path_max;
+
+ path_max = 128; /* 128 + 64 should be enough for 99% of cases */
+
+ while (1) {
+ path_max += PATH_INCR;
+ cwd = xrealloc(cwd, path_max);
+ ret = getcwd(cwd, path_max);
+ if (ret == NULL) {
+ if (errno == ERANGE)
+ continue;
+ free(cwd);
+ bb_perror_msg("getcwd");
+ return NULL;
+ }
+ cwd = xrealloc(cwd, strlen(cwd) + 1);
+ return cwd;
+ }
+}