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' },
63 showHelp(int fd, char const *cmd, int res)
65 WRITE_MSG(fd, "Usage: ");
68 " <operation> <spaces>* [--] [<program> <args>*]\n"
70 "<operation> can be one of:\n"
71 " --new|-n ... create new spaces and execute <program> there;\n"
72 " <program> is mandatory in this case\n"
73 " --enter|-e <xid> ... enter the spaces of context <xid> and execute\n"
74 " <program> there; <program> is mandatory in this\n"
76 " --set|-s ... assign the current spaces to the current context\n"
78 "<spaces>* specifies the spaces to manipulate.\n"
79 "It can be any combination of:\n"
80 " --mask <mask> ... specify a mask of spaces\n"
81 " --mount ... the mount namespace\n"
82 " --fs ... the fs_struct\n"
83 " --ipc ... the IPC namespace\n"
84 " --uts ... the uts namespace\n"
85 " --user ... the user namespace\n"
87 "Please report bugs to " PACKAGE_BUGREPORT "\n");
96 "vspace " VERSION " -- manages spaces\n"
97 "This program is part of " PACKAGE_STRING "\n\n"
98 "Copyright (C) 2004 Enrico Scholz\n"
99 "Copyright (C) 2007 Daniel Hokka Zakrisson\n"
100 VERSION_COPYRIGHT_DISCLAIMER);
105 newSpaces(uint_least64_t mask, const char *cmd)
109 signal(SIGCHLD, SIG_DFL);
112 pid = sys_clone((int) mask | CLONE_VFORK|SIGCHLD, 0);
114 pid = sys_clone((int) mask | SIGCHLD, 0);
119 perror(ENSC_WRAPPERS_PREFIX "clone()");
120 exit(wrapper_exit_code);
124 exitLikeProcess(pid, cmd, wrapper_exit_code);
129 enterSpaces(xid_t xid, uint_least64_t mask)
131 if (vc_enter_namespace(xid, mask)==-1) {
132 perror(ENSC_WRAPPERS_PREFIX "vc_enter_namespace()");
133 exit(wrapper_exit_code);
138 setSpaces(xid_t xid, uint_least64_t mask)
140 if (vc_set_namespace(xid, mask)==-1) {
141 perror(ENSC_WRAPPERS_PREFIX "vc_set_namespace()");
142 exit(wrapper_exit_code);
146 int main(int argc, char *argv[])
149 bool do_enter = false;
151 uint_least64_t mask = 0;
152 xid_t xid = VC_NOCTX;
156 int c = getopt_long(argc, argv, "+nsce:m:" "MFIUS", CMDLINE_OPTIONS, 0);
160 case CMD_HELP : showHelp(1, argv[0], 0);
161 case CMD_VERSION : showVersion();
162 case 'n' : do_new = true; break;
163 case 's' : do_set = true; break;
166 xid = Evc_xidopt2xid(optarg,true);
169 if (!isNumberUnsigned(optarg, &mask, true)) {
170 WRITE_MSG(2, "Invalid mask '");
171 WRITE_STR(2, optarg);
172 WRITE_MSG(2, "'; try '--help' for more information\n");
173 return wrapper_exit_code;
176 case 'M' : mask |= CLONE_NEWNS; break;
177 case 'F' : mask |= CLONE_FS; break;
178 case 'I' : mask |= CLONE_NEWIPC; break;
179 case 'U' : mask |= CLONE_NEWUTS; break;
180 case 'S' : mask |= CLONE_NEWUSER; break;
183 WRITE_MSG(2, "Try '");
184 WRITE_STR(2, argv[0]);
185 WRITE_MSG(2, " --help' for more information.\n");
191 sum = ((do_new ? 1 : 0) + (do_enter ? 1 : 0) +
195 WRITE_MSG(2, "No operation was specified; try '--help' for more information\n");
197 WRITE_MSG(2, "Can not specify multiple operations; try '--help' for more information\n");
199 WRITE_MSG(2, "Must specify at least one space; try '--help' for more information\n");
200 else if (optind==argc && (do_new || do_enter))
201 WRITE_MSG(2, "No command specified; try '--help' for more information\n");
203 if (do_new) newSpaces(mask, argv[optind]);
204 else if (do_set) setSpaces(VC_SAMECTX, mask);
205 else if (do_enter) enterSpaces(xid, mask);
208 EexecvpD(argv[optind], argv+optind);