log: Support using /dev/stdin for opening logs read-only.
On Unix-like systems, usually /dev/stdin opens a duplicate of fd 0, and
this will be convenient in a few places later on.  This commit makes this
support universal.
Acked-by: Justin Pettit
@@ -166,7 +166,13 @@ ovsdb_log_open(const char *name, const char *magic,
#ifdef _WIN32
flags = flags | O_BINARY;
#endif
+ /* Special case for /dev/stdin to make it work even if the operating system
+ * doesn't support it under that name. */
+ if (!strcmp(name, "/dev/stdin") && open_mode == OVSDB_LOG_READ_ONLY) {
+ fd = dup(STDIN_FILENO);
+ } else {
fd = open(name, flags, 0666);
+ }
if (fd < 0) {
const char *op = (open_mode == OVSDB_LOG_CREATE_EXCL ? "create"
: open_mode == OVSDB_LOG_CREATE ? "create or open"
