3 // Copyright (C) 2003 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
5 // This program is free software; you can redistribute it and/or modify
6 // it under the terms of the GNU General Public License as published by
7 // the Free Software Foundation; version 2 of the License.
9 // This program is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License
15 // along with this program; if not, write to the Free Software
16 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 #include "lib/utils-legacy.h"
24 #include "pathconfig.h"
36 #include <sys/utsname.h>
40 #include <sys/capability.h>
43 #define ENSC_WRAPPERS_FCNTL 1
44 #define ENSC_WRAPPERS_IO 1
45 #define ENSC_WRAPPERS_UNISTD 1
46 #define ENSC_WRAPPERS_VSERVER 1
49 typedef enum { tgNONE,tgCONTEXT, tgID, tgRUNNING,
50 tgVDIR, tgNAME, tgCFGDIR, tgAPPDIR,
52 tgINITPID, tgINITPID_PID,
53 tgXID, tgUTS, tgSYSINFO,
54 tgFEATURE, tgCANONIFY,
59 char const * const tag;
61 char const * const descr;
63 { "CONTEXT", tgCONTEXT, ("the current and/or assigned context; when an optinal argument "
64 "evaluates to false,only the current context will be printed") },
65 { "ID", tgID, "gives out the vserver-id for the context-xid" },
66 { "RUNNING", tgRUNNING, "gives out '1' when vserver is running; else, it fails without output" },
67 { "VDIR", tgVDIR, "gives out the root-directory of the vserver" },
68 { "NAME", tgNAME, "gives out the name of the vserver" },
69 { "CFGDIR", tgCFGDIR, "gives out the configuration directory of the vserver" },
70 { "APPDIR", tgAPPDIR, "gives out the name of the toplevel application cfgdir" },
71 { "INITPID", tgINITPID, "gives out the initpid of the given context" },
72 { "INITPID_PID", tgINITPID_PID, "gives out the initpid of the given pid" },
73 { "XID", tgXID, "gives out the context-id of the given pid" },
74 { "APIVER", tgAPIVER, "gives out the version of the kernel API" },
75 { "UTS", tgUTS, ("gives out an uts-entry; possible entries are "
76 "context, sysname, nodename, release, version, "
77 "machine and domainname") },
78 { "SYSINFO", tgSYSINFO, "gives out information about the systen" },
79 { "FEATURE", tgFEATURE, "returns 0 iff the queried feature is supported" },
80 { "PXID", tgPXID, "returns the xid of the parent context" },
81 { "CANONIFY", tgCANONIFY, "canonifies the vserver-name and removes dangerous characters" },
82 { "VERIFYCAP", tgVERIFYCAP, "test if the kernel supports linux capabilities" },
85 int wrapper_exit_code = 1;
87 static struct option const
89 { "help", no_argument, 0, 'h' },
90 { "version", no_argument, 0, 'v' },
96 showHelp(int fd, char const *cmd, int res)
98 WRITE_MSG(fd, "Usage: ");
101 " [-ql] <vserver>|<pid>|<context> <tag>\n"
102 "Please report bugs to " PACKAGE_BUGREPORT "\n");
110 "vserver-info " VERSION " -- returns information about vservers\n"
111 "This program is part of " PACKAGE_STRING "\n\n"
112 "Copyright (C) 2003 Enrico Scholz\n"
113 VERSION_COPYRIGHT_DISCLAIMER);
120 char const * delim = "";
123 WRITE_MSG(1, "Valid tags are: ");
124 for (i=0; i<DIM_OF(TAGS); ++i) {
126 WRITE_STR(1, TAGS[i].tag);
135 stringToTag(char const *str)
138 for (i=0; i<DIM_OF(TAGS); ++i)
139 if (strcmp(TAGS[i].tag, str)==0) return TAGS[i].val;
145 utsText2Tag(char const *str)
147 if (strcmp(str, "context") ==0) return vcVHI_CONTEXT;
148 else if (strcmp(str, "sysname") ==0) return vcVHI_SYSNAME;
149 else if (strcmp(str, "nodename") ==0) return vcVHI_NODENAME;
150 else if (strcmp(str, "release") ==0) return vcVHI_RELEASE;
151 else if (strcmp(str, "version") ==0) return vcVHI_VERSION;
152 else if (strcmp(str, "machine") ==0) return vcVHI_MACHINE;
153 else if (strcmp(str, "domainname")==0) return vcVHI_DOMAINNAME;
155 WRITE_MSG(2, "Unknown UTS tag\n");
163 struct __user_cap_header_struct header;
164 struct __user_cap_data_struct user;
165 header.version = _LINUX_CAPABILITY_VERSION;
169 WRITE_MSG(2, "'VERIFYCAP' can be executed as root only\n");
173 // if( prctl( PR_SET_KEEPCAPS, 1,0,0,0 ) < 0 ) {
174 // perror( "prctl:" );
178 if (capget(&header, &user)==-1) {
185 user.inheritable = 0;
187 if (capset(&header, &user)==-1) {
192 return chroot("/")==-1;
198 int v = vc_get_version();
204 l = utilvserver_fmt_xulong(0, (unsigned int)v);
205 memcpy(buf, "0x00000000", 10);
206 utilvserver_fmt_xulong(buf+2+8-l, (unsigned int)v);
212 getXid(char *buf, char const *vserver)
214 pid_t pid = atoi(vserver);
215 xid_t xid = vc_get_task_xid(pid);
217 if (xid==VC_NOCTX) perror("vc_get_task_xid()");
219 utilvserver_fmt_long(buf, xid);
227 getPXid(char UNUSED *buf, char const UNUSED *vserver)
229 // TODO: implement me when available
234 getInitPid_native(char *buf, xid_t xid)
236 struct vc_vx_info info;
238 if (vc_get_vx_info(xid, &info)==-1) perror("vc_get_vx_info()");
240 utilvserver_fmt_long(buf, info.initpid);
247 #if defined(VC_ENABLE_API_COMPAT) || defined(VC_ENABLE_API_V11)
249 selectPid(struct dirent const *ent)
251 return atoi(ent->d_name)!=0;
255 getInitPid_internal(pid_t pid, xid_t xid, pid_t *res)
260 size_t bufsize = utilvserver_getProcEntryBufsize();
264 pos = utilvserver_getProcEntry(pid, "\ns_context: ", buf, bufsize);
265 if (pos==0 && errno==EAGAIN) continue;
267 if (pos==0 || (xid_t)atoi(pos)!=xid) return false;
270 pos = strstr(buf, "\ninitpid: ");
273 pos += sizeof("\ninitpid: ")-1;
274 if (strncmp(pos, "none", 4)==0) *res = -1;
275 else *res = atoi(pos);
283 getInitPid_emulated(char *buf, xid_t xid)
285 struct dirent **namelist;
288 switchToWatchXid(0); // ignore errors silently...
289 n = scandir("/proc", &namelist, selectPid, alphasort);
290 if (n<0) perror("scandir()");
293 if (!getInitPid_internal(atoi(namelist[n]->d_name), xid, &pid)) continue;
295 utilvserver_fmt_long(buf, pid);
301 #endif // VC_ENABLE_API_COMPAT
304 getInitPid(char *buf, xid_t xid)
306 if (vc_isSupported(vcFEATURE_VINFO))
307 return getInitPid_native(buf, xid);
309 return getInitPid_emulated(buf, xid);
313 getInitPidPid(char *buf, char const *vserver)
315 struct vc_vx_info info;
316 pid_t pid = atoi(vserver);
317 xid_t xid = vc_get_task_xid(pid);
319 if (xid==VC_NOCTX) perror("vc_get_task_xid()");
320 else if (vc_get_vx_info(xid, &info)==-1) perror("vc_get_vx_info()");
322 utilvserver_fmt_long(buf, info.initpid);
330 getUTS(char *buf, xid_t xid, size_t argc, char * argv[])
333 vc_uts_type type = utsText2Tag(argv[0]);
334 if (vc_get_vhi_name(xid, type, buf, sizeof(buf)-1)==-1)
335 perror("vc_get_vhi_name()");
340 bool is_passed = false;
342 #define APPEND_UTS(TYPE) \
343 (((vc_get_vhi_name(xid, TYPE, tmp, sizeof(tmp)-1)!=-1) && (strcat(buf, tmp), strcat(buf, " "), is_passed=true)) || \
344 (strcat(buf, "??? ")))
346 if (APPEND_UTS(vcVHI_CONTEXT) &&
347 APPEND_UTS(vcVHI_SYSNAME) &&
348 APPEND_UTS(vcVHI_NODENAME) &&
349 APPEND_UTS(vcVHI_RELEASE) &&
350 APPEND_UTS(vcVHI_VERSION) &&
351 APPEND_UTS(vcVHI_MACHINE) &&
352 APPEND_UTS(vcVHI_DOMAINNAME) &&
356 perror("vc_get_vhi_name()");
364 printSysInfo(char *buf)
366 int fd = open(PKGLIBDIR "/FEATURES.txt", O_RDONLY);
375 WRITE_STR(1, uts.release);
380 if (getAPIVer(buf)) WRITE_STR(1, buf);
381 else WRITE_MSG(1, "???");
384 " util-vserver: " PACKAGE_VERSION "; " __DATE__ ", " __TIME__"\n"
389 WRITE_MSG(1, "FEATURES.txt not found\n");
391 off_t l = Elseek(fd, 0, SEEK_END);
392 Elseek(fd, 0, SEEK_SET);
395 EreadAll(fd, buf, l);
396 EwriteAll(1, buf, l);
405 getContext(char *buf, char const *vserver, bool allow_only_static)
407 xid_t xid = vc_getVserverCtx(vserver, vcCFG_AUTO,
408 allow_only_static, 0);
409 if (xid==VC_NOCTX) return 0;
411 utilvserver_fmt_long(buf, xid);
416 testFeature(int argc, char *argv[])
418 return (argc>0 && vc_isSupportedString(argv[0])) ? EXIT_SUCCESS : EXIT_FAILURE;
422 str2bool(char const *str)
424 return atoi(str)!=0 || strchr("yYtY", str[0])!=0 || strcasecmp("true", str)==0;
428 execQuery(char const *vserver, VserverTag tag, int argc, char *argv[])
430 char const * res = 0;
431 char buf[sizeof(xid_t)*4 + 1024 + strlen(vserver)];
433 memset(buf, 0, sizeof buf);
435 case tgNAME : res = vc_getVserverName(vserver, vcCFG_AUTO); break;
437 res = vc_getVserverVdir(vserver, vcCFG_AUTO, argc>0 && atoi(argv[0]));
439 case tgCFGDIR : res = vc_getVserverCfgDir(vserver, vcCFG_AUTO); break;
441 res = vc_getVserverAppDir(vserver, vcCFG_AUTO, argc==0 ? "" : argv[0]);
445 res = (vc_getVserverCtx(vserver, vcCFG_AUTO, false, 0)==VC_NOCTX) ? 0 : "1";
449 strcpy(buf, vserver);
450 if (canonifyVserverName(buf)>0) res = buf;
453 case tgCONTEXT : res = getContext(buf, vserver,
454 argc==0 || str2bool(argv[0])); break;
455 case tgINITPID_PID : res = getInitPidPid(buf, vserver); break;
456 case tgAPIVER : res = getAPIVer(buf); break;
457 case tgXID : res = getXid(buf, vserver); break;
458 case tgPXID : res = getPXid(buf, vserver); break;
459 case tgSYSINFO : return printSysInfo(buf); break;
460 case tgFEATURE : return testFeature(argc,argv); break;
461 case tgVERIFYCAP : return verifyCap() ? 0 : 1; break;
465 xid_t xid = *vserver!='\0' ? vc_xidopt2xid(vserver,true,0) : VC_SAMECTX;
468 case tgID : res = vc_getVserverByCtx(xid,0,0); break;
469 case tgINITPID : res = getInitPid(buf, xid); break;
470 case tgUTS : res = getUTS(buf, xid, argc, argv); break;
472 default : assert(false); abort(); // TODO
477 if (res==0) return EXIT_FAILURE;
483 int main(int argc, char *argv[])
486 char const * vserver;
490 int c = getopt_long(argc, argv, "ql", CMDLINE_OPTIONS, 0);
494 case 'h' : showHelp(1, argv[0], 0);
495 case 'v' : showVersion();
496 case 'l' : showTags();
497 case 'q' : quiet = true; break;
499 WRITE_MSG(2, "Try '");
500 WRITE_STR(2, argv[0]);
501 WRITE_MSG(2, " --help\" for more information.\n");
508 execQuery("-", tgSYSINFO, 0, 0);
509 WRITE_MSG(2, "\nAssumed 'SYSINFO' as no other option given; try '--help' for more information.\n");
513 vserver = argv[optind];
514 tag = stringToTag(argv[optind+1]);
517 WRITE_MSG(2, "Unknown tag; use '-l' to get list of valid tags\n");
522 int fd = Eopen("/dev/null", O_WRONLY, 0644);
527 return execQuery(vserver, tag, argc-(optind+2), argv+optind+2);