portmap-4.0-rpc_user.patch

用于生成linux操作系统下的交叉编译工具链和嵌入式linux系统的根文件系统,支持x86、arm、powerpc等处理器

diff -urN portmap_4/daemon.c portmap_4.new/daemon.c
--- portmap_4/daemon.c	Thu Aug  3 18:07:22 2000
+++ portmap_4.new/daemon.c	Fri Aug  4 08:45:25 2000
@@ -35,6 +35,7 @@
 static char sccsid[] = "@(#)daemon.c	5.3 (Berkeley) 12/28/90";
 #endif /* LIBC_SCCS and not lint */
 
+#include <stdlib.h>
 #include <sys/types.h>
 #include <fcntl.h>
 #include <unistd.h>
diff -urN portmap_4/pmap_check.c portmap_4.new/pmap_check.c
--- portmap_4/pmap_check.c	Thu Aug  3 18:07:22 2000
+++ portmap_4.new/pmap_check.c	Thu Aug  3 18:29:51 2000
@@ -40,6 +40,8 @@
 #include <rpc/pmap_prot.h>
 #include <syslog.h>
 #include <netdb.h>
+#include <pwd.h>
+#include <sys/types.h>
 #include <sys/signal.h>
 #ifdef SYSV40
 #include <netinet/in.h>
@@ -149,11 +151,32 @@
     /*
      * Give up root privileges so that we can never allocate a privileged
      * port when forwarding an rpc request.
+     *
+     * Fix 8/3/00 Philipp Knirsch: First lookup our rpc user. If we find it,
+     * switch to that uid, otherwise simply resue the old bin user and print
+     * out a warning in syslog.
      */
-    if (setuid(1) == -1) {
-	syslog(LOG_ERR, "setuid(1) failed: %m");
-	exit(1);
+
+    struct passwd *pwent;
+
+    pwent = getpwnam("rpc");
+    if (pwent == NULL) {
+        syslog(LOG_WARNING, "user rpc not found, reverting to user bin");
+        if (setuid(1) == -1) {
+            syslog(LOG_ERR, "setuid(1) failed: %m");
+            exit(1);
+        }
     }
+    else {
+        if (setuid(pwent->pw_uid) == -1) {
+            syslog(LOG_WARNING, "setuid() to rpc user failed: %m");
+            if (setuid(1) == -1) {
+                syslog(LOG_ERR, "setuid(1) failed: %m");
+                exit(1);
+            }
+        }
+    }
+
     (void) signal(SIGINT, toggle_verboselog);
 }