util-vserver-0.30.208

[util-vserver.git] / lib / getvservername.c

diff --git a/lib/getvservername.c b/lib/getvservername.c
new file mode 100644 (file)
index 0000000..a8bc866
--- /dev/null
+++ b/lib/getvservername.c
@@ -0,0 +1,104 @@
+// $Id: getvservername.c,v 1.5 2004/05/08 01:27:25 ensc Exp $    --*- c -*--
+
+// Copyright (C) 2003 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.h"
+#include "pathconfig.h"
+
+#include <string.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <libgen.h>
+#include <unistd.h>
+#include <limits.h>
+
+static char *
+getRecentName(char *start, char *end)
+{
+  char         *res = 0;
+  int          fd;
+  char         buf[PATH_MAX];
+  
+  strcpy(end, "/name");
+  fd = open(start, O_RDONLY);
+  if (fd!=-1) {
+    off_t      len;
+
+    if ((len=lseek(fd, 0, SEEK_END))!=-1 &&
+       (len<VC_LIMIT_VSERVER_NAME_LEN) &&
+       (lseek(fd, 0, SEEK_SET)!=-1)) {
+      char     buf[len+1];
+
+      if (TEMP_FAILURE_RETRY(read(fd, buf, len+1))==len) {
+       while (len>0 && buf[len-1]=='\n') --len;
+       buf[len] = '\0';
+       if (len>0) res = buf;
+      }
+
+      close(fd);
+      return strdup(res);
+    }
+
+    close(fd);
+  }
+
+  if (res==0) {
+    *end = '\0';
+    res  = realpath(start, buf);
+    //printf("start='%s', res='%s'\n", start,res);
+    if (res==0) res = start;
+
+    res = basename(res);
+  }
+
+  return strdup(res);
+}
+
+char *
+vc_getVserverName(char const *id, vcCfgStyle style)
+{
+  size_t               l1  = strlen(id);
+
+  if (style==vcCFG_NONE || style==vcCFG_AUTO)
+    style = vc_getVserverCfgStyle(id);
+
+  switch (style) {
+    case vcCFG_NONE            :  return 0;
+    case vcCFG_LEGACY          :  return strdup(id);
+    case vcCFG_RECENT_SHORT    :
+    {
+      char             buf[sizeof(CONFDIR "/") + l1 + sizeof("/name") - 1];
+
+      strcpy(buf,                         CONFDIR "/");
+      strcpy(buf+sizeof(CONFDIR "/") - 1, id);
+      
+      return getRecentName(buf, buf+sizeof(CONFDIR "/")+l1 - 1);
+    }
+    case vcCFG_RECENT_FULL     :
+    {
+      char             buf[l1 + sizeof("/name")];
+      strcpy(buf, id);
+
+      return getRecentName(buf, buf+l1);
+    }
+    default                    :  return 0;
+  }
+}