http://bugs.gentoo.org/attachment.cgi?id=156651
diff -Naur ./rexecd/rexecd.c ../copy/rexecd/rexecd.c
--- ./rexecd/rexecd.c	2000-07-23 06:16:22.000000000 +0200
+++ ../copy/rexecd/rexecd.c	2008-06-13 21:33:11.000000000 +0200
@@ -223,7 +223,8 @@
 static void
 doit(struct sockaddr_in *fromp)
 {
-	char cmdbuf[ARG_MAX+1];
+	char *cmdbuf;
+	long cmdbuflen;
 	char user[16], pass[16];
 	struct passwd *pwd;
 	int s = -1;
@@ -242,6 +243,18 @@
 #endif
 #endif /* USE_PAM */
 
+        cmdbuflen = sysconf (_SC_ARG_MAX);
+        if (!(cmdbuflen > 0)) {
+                syslog (LOG_ERR, "sysconf (_SC_ARG_MAX) failed");
+                fatal ("sysconf (_SC_ARG_MAX) failed\n");
+        }
+ 
+        cmdbuf = malloc (++cmdbuflen);
+        if (cmdbuf == NULL) {
+                syslog (LOG_ERR, "Could not allocate space for cmdbuf");
+                fatal ("Could not allocate space for cmdbuf\n");
+        }
+
 	signal(SIGINT, SIG_DFL);
 	signal(SIGQUIT, SIG_DFL);
 	signal(SIGTERM, SIG_DFL);
@@ -291,7 +304,7 @@
 
 	getstr(user, sizeof(user), "username too long\n");
 	getstr(pass, sizeof(pass), "password too long\n");
-	getstr(cmdbuf, sizeof(cmdbuf), "command too long\n");
+	getstr(cmdbuf, cmdbuflen, "command too long\n");
 #ifdef USE_PAM
        #define PAM_BAIL if (pam_error != PAM_SUCCESS) { \
 	       pam_end(pamh, pam_error); exit(1); \
diff -Naur ./rshd/rshd.c ../copy/rshd/rshd.c
--- ./rshd/rshd.c	2008-06-13 21:40:15.000000000 +0200
+++ ../copy/rshd/rshd.c	2008-06-13 21:45:04.000000000 +0200
@@ -337,7 +337,8 @@
 static void
 doit(struct sockaddr_in *fromp)
 {
-	char cmdbuf[ARG_MAX+1];
+	char *cmdbuf;
+	long cmdbuflen;
 	const char *theshell, *shellname;
 	char locuser[16], remuser[16];
 	struct passwd *pwd;
@@ -346,6 +347,18 @@
 	u_short port;
 	int pv[2], pid, ifd;
 
+	cmdbuflen = sysconf (_SC_ARG_MAX);
+	if (!(cmdbuflen > 0)) {
+		syslog (LOG_ERR, "sysconf (_SC_ARG_MAX) failed");
+		exit (1);
+	}
+
+	cmdbuf = malloc (++cmdbuflen);
+	if (cmdbuf == NULL) {
+		syslog (LOG_ERR, "Could not allocate space for cmdbuf");
+		exit (1);
+	}
+
 	signal(SIGINT, SIG_DFL);
 	signal(SIGQUIT, SIG_DFL);
 	signal(SIGTERM, SIG_DFL);