util-vserver-0.30.208

[util-vserver.git] / vserver-start / defaulttty.c

diff --git a/vserver-start/defaulttty.c b/vserver-start/defaulttty.c
new file mode 100644 (file)
index 0000000..8b71080
--- /dev/null
+++ b/vserver-start/defaulttty.c
@@ -0,0 +1,80 @@
+// $Id: defaulttty.c,v 1.2 2005/01/26 15:30:40 ensc Exp $    --*- c -*--
+
+// Copyright (C) 2004 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
+//  
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; version 2 of the License.
+//  
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//  
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include "vserver-start.h"
+#include <pathconfig.h>
+
+#include <lib_internal/string.h>
+
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#define ENSC_WRAPPERS_UNISTD   1
+#define ENSC_WRAPPERS_FCNTL    1
+#include <wrappers.h>
+
+
+inline static bool
+checkTTY(char const /*@null@*/ *p)
+{
+  return p!=0 && access(p, R_OK|W_OK)==0;
+}
+
+void
+setDefaultTTY(PathInfo const *cfgdir, char const *dflt)
+{
+  PathInfo     subpath = ENSC_STRING_FIXED("/apps/init/tty");
+  char         buf[ENSC_PI_APPSZ(*cfgdir, subpath)];
+  char const * new_tty = 0;
+
+  do {
+    PathInfo   ttypath = *cfgdir;
+    
+    PathInfo_append(&ttypath, &subpath, buf);
+    new_tty = String_c_str(&ttypath, buf);
+    if (checkTTY(new_tty)) break;
+
+    new_tty = CONFDIR "/.defaults/apps/init/tty";
+    if (checkTTY(new_tty)) break;
+
+    new_tty = dflt;
+    if (checkTTY(new_tty)) break;
+
+    new_tty = "/dev/null";
+  } while (false);
+
+  int          fd_in  = Eopen(new_tty, O_RDONLY, 0);
+  if (fd_in!=0) {
+    Edup2(fd_in,  0);
+    Eclose(fd_in);
+  }
+  
+  int          fd_out = Eopen(new_tty, O_WRONLY, 0600);
+  if (fd_out!=1) {
+    Edup2(fd_out, 1);
+    Eclose(fd_out);
+  }
+  
+  Edup2(1, 2);
+}