3 // Copyright (C) 2004 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
4 // Copyright (C) 2007 Daniel Hokka Zakrisson
6 // This program is free software; you can redistribute it and/or modify
7 // it under the terms of the GNU General Public License as published by
8 // the Free Software Foundation; version 2 of the License.
10 // This program is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 // GNU General Public License for more details.
15 // You should have received a copy of the GNU General Public License
16 // along with this program; if not, write to the Free Software
17 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 #include <lib_internal/sys_clone.h>
35 #define ENSC_WRAPPERS_PREFIX "vspace: "
36 #define ENSC_WRAPPERS_UNISTD 1
37 #define ENSC_WRAPPERS_VSERVER 1
40 #define CMD_HELP 0x1000
41 #define CMD_VERSION 0x1001
43 int wrapper_exit_code = 255;
47 { "help", no_argument, 0, CMD_HELP },
48 { "version", no_argument, 0, CMD_VERSION },
49 { "new", no_argument, 0, 'n' },
50 { "enter", required_argument, 0, 'e' },
51 { "set", no_argument, 0, 's' },
52 { "mask", required_argument, 0, 'm' },
54 { "mount", no_argument, 0, 'M' },
55 { "fs", no_argument, 0, 'F' },
56 { "ipc", no_argument, 0, 'I' },
57 { "uts", no_argument, 0, 'U' },
58 { "user", no_argument, 0, 'S' },
59 { "pid", no_argument, 0, 'P' },
60 { "net", no_argument, 0, 'N' },
65 showHelp(int fd, char const *cmd, int res)
67 WRITE_MSG(fd, "Usage: ");
70 " <operation> <spaces>* [--] [<program> <args>*]\n"
72 "<operation> can be one of:\n"
73 " --new|-n ... create new spaces and execute <program> there;\n"
74 " <program> is mandatory in this case\n"
75 " --enter|-e <xid> ... enter the spaces of context <xid> and execute\n"
76 " <program> there; <program> is mandatory in this\n"
78 " --set|-s ... assign the current spaces to the current context\n"
80 "<spaces>* specifies the spaces to manipulate.\n"
81 "It can be any combination of:\n"
82 " --mask <mask> ... specify a mask of spaces\n"
83 " --mount ... the mount namespace\n"
84 " --fs ... the fs_struct\n"
85 " --ipc ... the IPC namespace\n"
86 " --uts ... the uts namespace\n"
87 " --user ... the user namespace\n"
88 " --pid ... the pid namespace\n"
89 " --net ... the network namespace\n"
91 "Please report bugs to " PACKAGE_BUGREPORT "\n");
100 "vspace " VERSION " -- manages spaces\n"
101 "This program is part of " PACKAGE_STRING "\n\n"
102 "Copyright (C) 2004 Enrico Scholz\n"
103 "Copyright (C) 2007 Daniel Hokka Zakrisson\n"
104 VERSION_COPYRIGHT_DISCLAIMER);
109 newSpaces(uint_least64_t mask)
113 /* optimize default case */
119 signal(SIGCHLD, SIG_DFL);
122 pid = sys_clone((int) mask | CLONE_VFORK|SIGCHLD, 0);
124 pid = sys_clone((int) mask | SIGCHLD, 0);
129 perror(ENSC_WRAPPERS_PREFIX "clone()");
130 exit(wrapper_exit_code);
134 vc_exitLikeProcess(pid, wrapper_exit_code);
139 enterSpaces(xid_t xid, uint_least64_t mask)
141 if (vc_enter_namespace(xid, mask)==-1) {
142 perror(ENSC_WRAPPERS_PREFIX "vc_enter_namespace()");
143 exit(wrapper_exit_code);
148 setSpaces(xid_t xid, uint_least64_t mask)
150 if (vc_set_namespace(xid, mask)==-1) {
151 perror(ENSC_WRAPPERS_PREFIX "vc_set_namespace()");
152 exit(wrapper_exit_code);
156 int main(int argc, char *argv[])
159 bool do_enter = false;
161 uint_least64_t mask = 0;
162 xid_t xid = VC_NOCTX;
166 int c = getopt_long(argc, argv, "+nsce:m:" "MFIUSPN", CMDLINE_OPTIONS, 0);
170 case CMD_HELP : showHelp(1, argv[0], 0);
171 case CMD_VERSION : showVersion();
172 case 'n' : do_new = true; break;
173 case 's' : do_set = true; break;
176 xid = Evc_xidopt2xid(optarg,true);
179 unsigned long mask_l;
180 if (!isNumberUnsigned(optarg, &mask_l, true)) {
181 WRITE_MSG(2, "Invalid mask '");
182 WRITE_STR(2, optarg);
183 WRITE_MSG(2, "'; try '--help' for more information\n");
184 return wrapper_exit_code;
189 case 'M' : mask |= CLONE_NEWNS; break;
190 case 'F' : mask |= CLONE_FS; break;
191 case 'I' : mask |= CLONE_NEWIPC; break;
192 case 'U' : mask |= CLONE_NEWUTS; break;
193 case 'S' : mask |= CLONE_NEWUSER; break;
194 case 'P' : mask |= CLONE_NEWPID; break;
195 case 'N' : mask |= CLONE_NEWNET; break;
198 WRITE_MSG(2, "Try '");
199 WRITE_STR(2, argv[0]);
200 WRITE_MSG(2, " --help' for more information.\n");
206 sum = ((do_new ? 1 : 0) + (do_enter ? 1 : 0) +
210 WRITE_MSG(2, "No operation was specified; try '--help' for more information\n");
212 WRITE_MSG(2, "Can not specify multiple operations; try '--help' for more information\n");
213 else if (optind==argc && (do_new || do_enter))
214 WRITE_MSG(2, "No command specified; try '--help' for more information\n");
216 if (do_new) newSpaces(mask);
217 else if (do_set) setSpaces(VC_SAMECTX, mask);
218 else if (do_enter) enterSpaces(xid, mask);
221 EexecvpD(argv[optind], argv+optind);