File coreutils-bnc#697897-setsid.patch of Package coreutils

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File coreutils-bnc#697897-setsid.patch of Package coreutils (Revision f10bf6020f4e64fa7f29a16ba05cbb5d)

Currently displaying revision f10bf6020f4e64fa7f29a16ba05cbb5d , Show latest

Index: doc/coreutils.texi
===================================================================
--- doc/coreutils.texi.orig	2012-03-26 14:08:30.000000000 +0200
+++ doc/coreutils.texi	2012-04-18 11:17:09.917545246 +0200
@@ -15864,6 +15864,10 @@ failed, and optionally successful, @command{su} attempts.  (If the system
 authentication.  You can edit @file{/etc/pam.d/su} resp @file{/etc/pam.d/su-l}
 to customize its behaviour.
 
+If the environment variable @env{SU_COMMAND_SAME_SESSION} is set,
+@command{su} will not open a new session for running a command thus
+making @option{-c} behaves just like @option{-C}.
+
 The program accepts the following options.  Also see @ref{Common options}.
 
 @table @samp
@@ -15874,6 +15878,14 @@ The program accepts the following options.  Also see @ref{Common options}.
 Pass @var{command}, a single command line to run, to the shell with
 a @option{-c} option instead of starting an interactive shell.
 
+@item -C @var{COMMAND}
+@itemx --session-command=@var{COMMAND}
+@opindex -C
+@opindex --session-command
+Pass @var{COMMAND}, a single command line to run, to the shell with a
+@option{-c} option instead of starting an interactive and do not
+create a new session for it.
+
 @item -f
 @itemx --fast
 @opindex -f
Index: src/su.c
===================================================================
--- src/su.c.orig	2012-04-18 11:17:09.856546407 +0200
+++ src/su.c	2012-04-18 11:17:09.917545246 +0200
@@ -141,6 +141,9 @@ static bool simulate_login;
 /* 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;
+
 #ifdef USE_PAM
 static bool _pam_session_opened;
 static bool _pam_cred_established;
@@ -149,6 +152,7 @@ static bool _pam_cred_established;
 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'},
@@ -326,14 +330,29 @@ create_watching_parent (void)
       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))
+            {
+              error (0, errno, _("cannot set signal handler"));
+              caught_signal = true;
+            }
+        }
+      if (!caught_signal && (sigaddset(&ourset, SIGTERM)
+                      || sigaddset(&ourset, SIGALRM)
+                      || sigaction(SIGTERM, &action, NULL)
+                      || sigprocmask(SIG_UNBLOCK, &ourset, NULL)))
+        {
 	  error (0, errno, _("cannot set signal handler"));
 	  caught_signal = true;
 	}
+    if (!caught_signal && !same_session && (sigaction(SIGINT, &action, NULL)
+                                     || sigaction(SIGQUIT, &action, NULL)))
+      {
+        error (0, errno, _("cannot set signal handler"));
+        caught_signal = true;
+      }
     }
   if (!caught_signal)
     {
@@ -750,6 +769,8 @@ Change the effective user id and group i
 \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\
@@ -772,6 +793,7 @@ main (int argc, char **argv)
   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;
@@ -795,6 +817,14 @@ main (int argc, char **argv)
         {
         case 'c':
           command = optarg;
+          if (NULL != getenv ("SU_COMMAND_SAME_SESSION") ||
+              NULL != getenv ("SU_COMMAND_OPENS_SESSION"))
+            request_same_session = 1;
+          break;
+
+        case 'C':
+          command = optarg;
+          request_same_session = 1;
           break;
 
         case 'f':
@@ -867,6 +897,9 @@ main (int argc, char **argv)
     }
 #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))
@@ -889,6 +922,9 @@ main (int argc, char **argv)
 
   change_identity (pw);
 
+  if (!same_session)
+    setsid ();
+
   /* Set environment after pam_open_session, which may put KRB5CCNAME
      into the pam_env, etc.  */

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File coreutils-bnc#697897-setsid.patch of Package coreutils (Revision f10bf6020f4e64fa7f29a16ba05cbb5d)

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