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-rw-r--r--xorg-server/os/utils.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/xorg-server/os/utils.c b/xorg-server/os/utils.c
index c40a938f7..ff3b7e40a 100644
--- a/xorg-server/os/utils.c
+++ b/xorg-server/os/utils.c
@@ -2129,3 +2129,27 @@ FormatUInt64Hex(uint64_t num, char *string)
string[len] = '\0';
}
+
+/* Move a file descriptor out of the way of our select mask; this
+ * is useful for file descriptors which will never appear in the
+ * select mask to avoid reducing the number of clients that can
+ * connect to the server
+ */
+int
+os_move_fd(int fd)
+{
+ int newfd;
+
+#ifdef F_DUPFD_CLOEXEC
+ newfd = fcntl(fd, F_DUPFD_CLOEXEC, MAXCLIENTS);
+#else
+ newfd = fcntl(fd, F_DUPFD, MAXCLIENTS);
+#endif
+ if (newfd < 0)
+ return fd;
+#ifndef F_DUPFD_CLOEXEC
+ fcntl(newfd, F_SETFD, FD_CLOEXEC);
+#endif
+ close(fd);
+ return newfd;
+}