--- /dev/null
+// $Id: save_ctxinfo.c,v 1.16 2005/02/15 18:04:11 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.
+
+// Saves current ctx + vserver-info into 'argv[1] + /run' which must be a dead
+// symlink
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "pathconfig.h"
+#include "vserver.h"
+#include "internal.h"
+#include "util.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <limits.h>
+#include <errno.h>
+
+#define ENSC_WRAPPERS_PREFIX "save_ctxinfo: "
+#define ENSC_WRAPPERS_VSERVER 1
+#define ENSC_WRAPPERS_UNISTD 1
+#define ENSC_WRAPPERS_FCNTL 1
+#include <wrappers.h>
+
+int wrapper_exit_code = 255;
+
+inline static void
+checkParams(int argc, char UNUSED * argv[])
+{
+ if (argc<3) {
+ WRITE_MSG(2, "Usage: save_ctxinfo <VSERVER_DIR> <cmd> <args>*\n");
+ exit(255);
+ }
+}
+
+int main(int argc, char *argv[])
+{
+ char runfile[(checkParams(argc,argv),strlen(argv[1])) + sizeof(DEFAULT_PKGSTATEREVDIR "/99999")];
+ char dstfile[PATH_MAX];
+ int fd;
+ char buf[sizeof(int)*3+2];
+ xid_t ctx;
+ ssize_t len;
+ ssize_t len1 = strlen(argv[1]);
+
+ strcpy(runfile, argv[1]);
+ strcpy(runfile+len1, "/run");
+
+ ctx=Evc_get_task_xid(0);
+
+ if (ctx==0) {
+ WRITE_MSG(2, "save_ctxinfo: Can not operate in context 0\n");
+ return 255;
+ }
+
+ if (reinterpret_cast(unsigned int)(ctx)>99999) {
+ WRITE_MSG(2, "save_ctxinfo: unexpected context\n");
+ return 255;
+ }
+
+ len = EreadlinkD(runfile, dstfile, sizeof(dstfile)-1);
+ dstfile[len] = '\0';
+ len = utilvserver_fmt_uint(buf, ctx);
+
+ fd = EopenD(dstfile, O_EXCL|O_CREAT|O_WRONLY, 0644);
+ if (write(fd, buf, len) !=len ||
+ write(fd, "\n", 1) !=1) {
+ perror("save_ctxinfo: write()");
+ return -1;
+ }
+ Eclose(fd);
+
+ strcpy(runfile, DEFAULT_PKGSTATEREVDIR "/");
+ strncat(runfile, buf, len);
+ unlink(runfile);
+ EsymlinkD(argv[1], runfile);
+
+ Eexecv(argv[2], argv+2);
+}