[hackers] [ubase] Check for cmd truncation in watch(1) || sin

[git]

commit 4a324f635986087c8a609687cc7227f95a413fc4
Author: sin <s...@2f30.org>
Date:   Mon Aug 25 19:14:34 2014 +0100

    Check for cmd truncation in watch(1)

diff --git a/watch.c b/watch.c
index cd4facc..9d8a9ae 100644
--- a/watch.c
+++ b/watch.c
@@ -31,10 +31,13 @@ main(int argc, char *argv[])
        if (argc < 1)
                usage();
 
-       strlcpy(cmd, argv[0], sizeof(cmd));
+       if (strlcpy(cmd, argv[0], sizeof(cmd)) >= sizeof(cmd))
+               eprintf("command too long
");
        for (i = 1; i < argc; i++) {
-               strlcat(cmd, " ", sizeof(cmd));
-               strlcat(cmd, argv[i], sizeof(cmd));
+               if (strlcat(cmd, " ", sizeof(cmd)) >= sizeof(cmd))
+                       eprintf("command too long
");
+               if (strlcat(cmd, argv[i], sizeof(cmd)) >= sizeof(cmd))
+                       eprintf("command too long
");
        }
 
        for (;;) {