/*
- * Copyright (c) 2008, 2009 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010 Nicira Networks.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
va_start(args, format);
vfprintf(stderr, format, args);
va_end(args);
- if (err_no != 0)
- fprintf(stderr, " (%s)", strerror(err_no));
+ if (err_no != 0) {
+ fprintf(stderr, " (%s)",
+ err_no == EOF ? "end of file" : strerror(err_no));
+ }
putc('\n', stderr);
errno = save_errno;
NOT_REACHED();
}
+
+/* Returns the directory name portion of 'file_name' as a malloc()'d string,
+ * similar to the POSIX dirname() function but thread-safe. */
+char *
+dir_name(const char *file_name)
+{
+ size_t len = strlen(file_name);
+ while (len > 0 && file_name[len - 1] == '/') {
+ len--;
+ }
+ while (len > 0 && file_name[len - 1] != '/') {
+ len--;
+ }
+ while (len > 0 && file_name[len - 1] == '/') {
+ len--;
+ }
+ if (!len) {
+ return xstrdup((file_name[0] == '/'
+ && file_name[1] == '/'
+ && file_name[2] != '/') ? "//"
+ : file_name[0] == '/' ? "/"
+ : ".");
+ } else {
+ return xmemdup0(file_name, len);
+ }
+}
+
+/* Pass a value to this function if it is marked with
+ * __attribute__((warn_unused_result)) and you genuinely want to ignore
+ * its return value. (Note that every scalar type can be implicitly
+ * converted to bool.) */
+void ignore(bool x OVS_UNUSED) { }