Source code upload

eoe/cmd/initpkg/mrinterface.c

@@ -0,0 +1,53 @@
+#include <stdio.h>
+#include <netinet/in.h>
+#include <sys/ioctl.h>
+#include <net/if.h>
+
+/*
+ * 
+ * This code is to be used in miniroot instead of using
+ * netstat in the mrnetrc script.
+ *
+ * The problem with using netstat is that is uses NLIST
+ * but it is possible that the kernel has not been
+ * placed on the /swap filesystem yet.  Thus causing
+ * netstat to fail and print "/unix no namelist" error message.
+ *
+ * The script that calls this routine either expects success (0)
+ * or failure (1).  This is the reason why the if a system call 
+ * errors the return value is "-1".
+ * 
+ */
+main()
+{
+	int s, n;
+	char buf[BUFSIZ];
+	struct ifconf ifc;
+	struct ifreq ifreq, *ifr;
+
+	if ((s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) 
+		return(-1);
+
+	ifc.ifc_len = sizeof (buf);
+	ifc.ifc_buf = buf;
+	if (ioctl(s, SIOCGIFCONF, (char *)&ifc) < 0) 
+		return(-1);
+
+	ifr = ifc.ifc_req;
+	for (n = ifc.ifc_len / sizeof (struct ifreq); n > 0; n--, ifr++) {
+		if (strncmp(ifr->ifr_name,"lo0",3) != 0) {
+			ifreq = *ifr;
+			if (ioctl(s, SIOCGIFFLAGS, (char *)&ifreq) < 0)
+				return(-1);
+
+			if ((ifreq.ifr_flags & (IFF_UP|IFF_RUNNING)) 
+				== (IFF_UP|IFF_RUNNING))
+				   return(0);
+		}
+	}
+
+	/*
+	 * At this point the network is not up and running ....
+	 */
+	return (1);
+}