[U-Boot-Users] [PATCH 9/11] Add default IP addr to ping command

[Keith J Outwater]

The patch below adds a default address (taken from the environment) to the 
ping command.

diff --git a/common/cmd_net.c b/common/cmd_net.c
index 2cb2c5d..9b6a117 100644
--- a/common/cmd_net.c
+++ b/common/cmd_net.c
@@ -223,21 +223,34 @@ #endif
 #if (CONFIG_COMMANDS & CFG_CMD_PING)
 int do_ping (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 {
-       if (argc < 2)
-               return -1;
+       char *s;
+       char *host;
+
+       if (argc < 2) {
+               if ((s = getenv("serverip")) != NULL) {
+                       NetPingIP = string_to_ip(s);
+                       host = s;
+               }
+               else {
+                       return -1;
+               }
+       }
+       else {
+               NetPingIP = string_to_ip(argv[1]);
+               host = argv[1];
+       }
 
-       NetPingIP = string_to_ip(argv[1]);
        if (NetPingIP == 0) {
                printf ("Usage:\n%s\n", cmdtp->usage);
                return -1;
        }
 
        if (NetLoop(PING) < 0) {
-               printf("ping failed; host %s is not alive\n", argv[1]);
+               printf("ping failed; host %s is not alive\n", host);
                return 1;
        }
 
-       printf("host %s is alive\n", argv[1]);
+       printf("host %s is alive\n", host);
 
        return 0;
 }
@@ -245,7 +258,7 @@ int do_ping (cmd_tbl_t *cmdtp, int flag,
 U_BOOT_CMD(
        ping,   2,      1,      do_ping,
        "ping\t- send ICMP ECHO_REQUEST to network host\n",
-       "pingAddress\n"
+       "pingAddress (default is $serverip)\n"
 );
 #endif /* CFG_CMD_PING */
 
Signed-off-by: Keith Outwater <outwater4 at comcast.net>