coreutils/coreutils-setsid.patch

--- coreutils-6.7/src/su.c.setsid	2007-01-09 17:26:26.000000000 +0000
+++ coreutils-6.7/src/su.c	2007-01-09 17:26:57.000000000 +0000
@@ -176,9 +176,13 @@
 /* If true, change some environment vars to indicate the user su'd to.  */
 static bool change_environment;
 
+/* If true, then don't call setsid() with a command. */
+int same_session = 0;
+
 static struct option const longopts[] =
 {
   {"command", required_argument, NULL, 'c'},
+  {"session-command", required_argument, NULL, 'C'},
   {"fast", no_argument, NULL, 'f'},
   {"login", no_argument, NULL, 'l'},
   {"preserve-environment", no_argument, NULL, 'p'},
@@ -478,6 +482,8 @@
   if (child == 0) {  /* child shell */
   change_identity (pw);
   pam_end(pamh, 0);
+  if (!same_session)
+    setsid ();
 #endif
 
   if (simulate_login)
@@ -532,13 +538,27 @@
     sigemptyset(&action.sa_mask);
     action.sa_flags = 0;
     sigemptyset(&ourset);
-    if (sigaddset(&ourset, SIGTERM)
-        || sigaddset(&ourset, SIGALRM)
-        || sigaction(SIGTERM, &action, NULL)
-        || sigprocmask(SIG_UNBLOCK, &ourset, NULL)) {
+    if (!same_session)
+      {
+        if (sigaddset(&ourset, SIGINT) || sigaddset(&ourset, SIGQUIT))
+          {
+            fprintf(stderr, "%s: signal masking malfunction\n", PROGRAM_NAME);
+            caught = 1;
+          }
+      }
+    if (!caught && (sigaddset(&ourset, SIGTERM)
+                    || sigaddset(&ourset, SIGALRM)
+                    || sigaction(SIGTERM, &action, NULL)
+                    || sigprocmask(SIG_UNBLOCK, &ourset, NULL))) {
       fprintf(stderr, "%s: signal masking malfunction\n", PROGRAM_NAME);
       caught = 1;
     }
+    if (!caught && !same_session && (sigaction(SIGINT, &action, NULL)
+                                     || sigaction(SIGQUIT, &action, NULL)))
+      {
+        fprintf(stderr, "%s: signal masking malfunction\n", PROGRAM_NAME);
+        caught = 1;
+      }
   }
   if (!caught) {
     do {
@@ -609,6 +629,8 @@
 \n\
   -, -l, --login               make the shell a login shell\n\
   -c, --command=COMMAND        pass a single COMMAND to the shell with -c\n\
+  --session-command=COMMAND    pass a single COMMAND to the shell with -c\n\
+                               and do not create a new session\n\
   -f, --fast                   pass -f to the shell (for csh or tcsh)\n\
   -m, --preserve-environment   do not reset environment variables\n\
   -p                           same as -m\n\
@@ -631,6 +653,7 @@
   int optc;
   const char *new_user = DEFAULT_USER;
   char *command = NULL;
+  int request_same_session = 0;
   char *shell = NULL;
   struct passwd *pw;
   struct passwd pw_copy;
@@ -656,6 +679,11 @@
           command = optarg;
           break;
 
+        case 'C':
+          command = optarg;
+          request_same_session = 1;
+          break;
+
         case 'f':
           fast_startup = true;
           break;
@@ -725,6 +753,9 @@
     }
 #endif
 
+  if (request_same_session || !command || !pw->pw_uid)
+    same_session = 1;
+
   if (!shell && !change_environment)
     shell = getenv ("SHELL");
   if (shell && getuid () != 0 && restricted_shell (pw->pw_shell))