libreplace: poll based on select

2 files changed, 40 insertions, 0 deletions

diff --git a/lib/replace/system/config.m4 b/lib/replace/system/config.m4
index 04364bc3a1..b7cdf1414a 100644
--- a/lib/replace/system/config.m4
+++ b/lib/replace/system/config.m4
@@ -6,6 +6,10 @@ AC_CHECK_HEADERS(sys/acl.h acl/libacl.h sys/file.h)
 # select
 AC_CHECK_HEADERS(sys/select.h)
 
+# poll
+AC_CHECK_HEADERS(poll.h)
+AC_CHECK_FUNCS(poll,[],[LIBREPLACEOBJ="${LIBREPLACEOBJ} $libreplacedir/poll.o"])
+
 # time
 AC_CHECK_HEADERS(sys/time.h utime.h)
 AC_HEADER_TIME
diff --git a/lib/replace/system/select.h b/lib/replace/system/select.h
index da18de0cfc..11c5390d90 100644
--- a/lib/replace/system/select.h
+++ b/lib/replace/system/select.h
@@ -38,4 +38,40 @@
 #define SELECT_CAST
 #endif
 
+#ifdef HAVE_POLL
+
+#include <poll.h>
+
+#else
+
+/* Type used for the number of file descriptors.  */
+typedef unsigned long int nfds_t;
+
+/* Data structure describing a polling request.  */
+struct pollfd
+{
+	int fd;		   /* File descriptor to poll.  */
+	short int events;  /* Types of events poller cares about.  */
+	short int revents; /* Types of events that actually occurred.  */
+};
+
+/* Event types that can be polled for.  These bits may be set in `events'
+   to indicate the interesting event types; they will appear in `revents'
+   to indicate the status of the file descriptor.  */
+#define POLLIN		0x001		/* There is data to read.  */
+#define POLLPRI		0x002		/* There is urgent data to read.  */
+#define POLLOUT		0x004		/* Writing now will not block.  */
+#define POLLRDNORM	0x040		/* Normal data may be read.  */
+#define POLLRDBAND	0x080		/* Priority data may be read.  */
+#define POLLWRNORM	0x100		/* Writing now will not block.  */
+#define POLLWRBAND	0x200		/* Priority data may be written.  */
+#define POLLERR		0x008		/* Error condition.  */
+#define POLLHUP		0x010		/* Hung up.  */
+#define POLLNVAL	0x020		/* Invalid polling request.  */
+
+/* define is in "replace.h" */
+int rep_poll(struct pollfd *fds, nfds_t nfds, int timeout);
+
+#endif
+
 #endif