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Diffstat (limited to 'i/pc104/initrd/conf/busybox/libbb/xgetcwd.c')
-rw-r--r--i/pc104/initrd/conf/busybox/libbb/xgetcwd.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/i/pc104/initrd/conf/busybox/libbb/xgetcwd.c b/i/pc104/initrd/conf/busybox/libbb/xgetcwd.c
new file mode 100644
index 0000000..ec1d8f7
--- /dev/null
+++ b/i/pc104/initrd/conf/busybox/libbb/xgetcwd.c
@@ -0,0 +1,44 @@
+/* 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>
+*/
+
+#include "libbb.h"
+
+/* Amount to increase buffer size by in each try. */
+#define PATH_INCR 32
+
+/* 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 *
+xrealloc_getcwd_or_warn(char *cwd)
+{
+ char *ret;
+ unsigned path_max;
+
+ path_max = (unsigned) PATH_MAX;
+ path_max += 2; /* The getcwd docs say to do this. */
+
+ if (cwd == NULL)
+ cwd = xmalloc(path_max);
+
+ while ((ret = getcwd(cwd, path_max)) == NULL && errno == ERANGE) {
+ path_max += PATH_INCR;
+ cwd = xrealloc(cwd, path_max);
+ }
+
+ if (ret == NULL) {
+ free(cwd);
+ bb_perror_msg("getcwd");
+ return NULL;
+ }
+
+ return cwd;
+}