+++ /dev/null
-// $Id: vnamespace.c 2415 2006-12-08 13:24:49Z dhozac $ --*- 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 "util.h"
-#include <lib_internal/sys_clone.h>
-
-#include <vserver.h>
-
-#include <getopt.h>
-#include <libgen.h>
-#include <errno.h>
-#include <signal.h>
-#include <sched.h>
-
-#define ENSC_WRAPPERS_PREFIX "vnamespace: "
-#define ENSC_WRAPPERS_UNISTD 1
-#define ENSC_WRAPPERS_VSERVER 1
-#include <wrappers.h>
-
-#define CMD_HELP 0x1000
-#define CMD_VERSION 0x1001
-
-int wrapper_exit_code = 255;
-
-struct option const
-CMDLINE_OPTIONS[] = {
- { "help", no_argument, 0, CMD_HELP },
- { "version", no_argument, 0, CMD_VERSION },
- { "new", no_argument, 0, 'n' },
- { "enter", required_argument, 0, 'e' },
- { "set", no_argument, 0, 's' },
- { "cleanup", no_argument, 0, 'c' },
- {0,0,0,0}
-};
-
-static void
-showHelp(int fd, char const *cmd, int res)
-{
- WRITE_MSG(fd, "Usage: ");
- WRITE_STR(fd, cmd);
- WRITE_MSG(fd,
- " <operation> [--] [<program> <args>*]\n"
- "\n"
- "<operation> can be one of:\n"
- " --new|-n ... create new namespace and execute <program> there;\n"
- " <program> is mandatory in this case\n"
- " --enter|-e <xid> ... enter the namespace of context <xid> and execute\n"
- " <program> there; <program> is mandatory in this\n"
- " case\n"
- " --set|-s ... make current namespace the namespace of the\n"
- " current context\n"
- " --cleanup|-c ... remove all mounts from the namespace of the\n"
- " current context\n"
- "\n"
- "Please report bugs to " PACKAGE_BUGREPORT "\n");
-
- exit(res);
-}
-
-static void
-showVersion()
-{
- WRITE_MSG(1,
- "vnamespace " VERSION " -- manages filesystem-namespace\n"
- "This program is part of " PACKAGE_STRING "\n\n"
- "Copyright (C) 2004 Enrico Scholz\n"
- VERSION_COPYRIGHT_DISCLAIMER);
- exit(0);
-}
-
-static void
-newNamespace(char const *cmd)
-{
- pid_t pid;
-
- signal(SIGCHLD, SIG_DFL);
-
-#ifdef NDEBUG
- pid = sys_clone(CLONE_NEWNS|CLONE_VFORK|SIGCHLD, 0);
-#else
- pid = sys_clone(CLONE_NEWNS|SIGCHLD, 0);
-#endif
-
- switch (pid) {
- case -1 :
- perror("vnamespace: clone()");
- exit(wrapper_exit_code);
- case 0 :
- break;
- default :
- exitLikeProcess(pid, cmd, wrapper_exit_code);
- }
-}
-
-static void
-enterNamespace(xid_t xid, uint_least64_t mask)
-{
- if (vc_enter_namespace(xid, mask)==-1) {
- perror("vnamespace: vc_enter_namespace()");
- exit(255);
- }
-}
-
-static void
-setNamespace(xid_t xid, uint_least64_t mask)
-{
- if (vc_set_namespace(xid, mask)==-1) {
- perror("vnamespace: vc_set_namespace()");
- exit(255);
- }
-}
-
-static void
-cleanupNamespace()
-{
- if (vc_cleanup_namespace()==-1) {
- perror("vnamespace: vc_cleanup_namespace()");
- exit(255);
- }
-}
-
-int main(int argc, char *argv[])
-{
- bool do_new = false;
- bool do_enter = false;
- bool do_set = false;
- bool do_cleanup = false;
- xid_t xid = VC_NOCTX;
- int sum = 0;
-
- while (1) {
- int c = getopt_long(argc, argv, "+nsce:", CMDLINE_OPTIONS, 0);
- if (c==-1) break;
-
- switch (c) {
- case CMD_HELP : showHelp(1, argv[0], 0);
- case CMD_VERSION : showVersion();
- case 'n' : do_new = true; break;
- case 's' : do_set = true; break;
- case 'c' : do_cleanup = true; break;
- case 'e' :
- do_enter = true;
- xid = Evc_xidopt2xid(optarg,true);
- break;
-
- default :
- WRITE_MSG(2, "Try '");
- WRITE_STR(2, argv[0]);
- WRITE_MSG(2, " --help' for more information.\n");
- return 255;
- break;
- }
- }
-
- sum = ((do_new ? 1 : 0) + (do_enter ? 1 : 0) +
- (do_set ? 1 : 0) + (do_cleanup ? 1 : 0));
-
- if (sum==0)
- WRITE_MSG(2, "No operation was specified; try '--help' for more information\n");
- else if (sum>1)
- WRITE_MSG(2, "Can not specify multiple operations; try '--help' for more information\n");
- else if (optind==argc && (do_new || do_enter))
- WRITE_MSG(2, "No command specified; try '--help' for more information\n");
- else {
- if (do_new) newNamespace(argv[optind]);
- else if (do_set) setNamespace(VC_SAMECTX, CLONE_NEWNS|CLONE_FS);
- else if (do_cleanup) cleanupNamespace();
- else if (do_enter) enterNamespace(xid, CLONE_NEWNS|CLONE_FS);
-
- if (optind<argc)
- EexecvpD(argv[optind], argv+optind);
-
- return EXIT_SUCCESS;
- }
-
- return 255;
-}
git://git.onelab.eu / util-vserver.git / blobdiff