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 #define ENSC_WRAPPERS_FCNTL 1
41 #define ENSC_WRAPPERS_IO 1
42 #define ENSC_WRAPPERS_UNISTD 1
43 #define ENSC_WRAPPERS_VSERVER 1
47 #include "capability-compat.h"
49 typedef enum { tgNONE,tgCONTEXT, tgID, tgRUNNING,
50 tgVDIR, tgNAME, tgCFGDIR, tgAPPDIR,
52 tgINITPID, tgINITPID_PID,
53 tgXID, tgUTS, tgSYSINFO,
54 tgFEATURE, tgCANONIFY,
55 tgVERIFYCAP, tgXIDTYPE, tgVERIFYPROC,
60 char const * const tag;
62 char const * const descr;
64 { "CONTEXT", tgCONTEXT, ("the current and/or assigned context; when an optinal argument "
65 "evaluates to false,only the current context will be printed") },
66 { "ID", tgID, "gives out the vserver-id for the context-xid" },
67 { "RUNNING", tgRUNNING, "gives out '1' when vserver is running; else, it fails without output" },
68 { "VDIR", tgVDIR, "gives out the root-directory of the vserver" },
69 { "NAME", tgNAME, "gives out the name of the vserver" },
70 { "CFGDIR", tgCFGDIR, "gives out the configuration directory of the vserver" },
71 { "APPDIR", tgAPPDIR, "gives out the name of the toplevel application cfgdir" },
72 { "INITPID", tgINITPID, "gives out the initpid of the given context" },
73 { "INITPID_PID", tgINITPID_PID, "gives out the initpid of the given pid" },
74 { "XID", tgXID, "gives out the context-id of the given pid" },
75 { "APIVER", tgAPIVER, "gives out the version of the kernel API" },
76 { "UTS", tgUTS, ("gives out an uts-entry; possible entries are "
77 "context, sysname, nodename, release, version, "
78 "machine and domainname") },
79 { "SYSINFO", tgSYSINFO, "gives out information about the systen" },
80 { "FEATURE", tgFEATURE, "returns 0 iff the queried feature is supported" },
81 { "PXID", tgPXID, "returns the xid of the parent context" },
82 { "CANONIFY", tgCANONIFY, "canonifies the vserver-name and removes dangerous characters" },
83 { "VERIFYCAP", tgVERIFYCAP, "test if the kernel supports linux capabilities" },
84 { "VERIFYPROC", tgVERIFYPROC, "test if /proc can be read by contexts!=0" },
85 { "XIDTYPE", tgXIDTYPE, "returns the type of the given XID" },
86 { "NID", tgNID, "outputs the network context-id of the given pid" },
87 { "TAG", tgTAG, "outputs the filesystem tag of the given pid" },
90 int wrapper_exit_code = 1;
92 static struct option const
94 { "help", no_argument, 0, 'h' },
95 { "version", no_argument, 0, 'v' },
101 showHelp(int fd, char const *cmd, int res)
103 WRITE_MSG(fd, "Usage: ");
106 " [-ql] <vserver>|<pid>|<context> <tag>\n"
107 "Please report bugs to " PACKAGE_BUGREPORT "\n");
115 "vserver-info " VERSION " -- returns information about vservers\n"
116 "This program is part of " PACKAGE_STRING "\n\n"
117 "Copyright (C) 2003 Enrico Scholz\n"
118 VERSION_COPYRIGHT_DISCLAIMER);
125 char const * delim = "";
128 WRITE_MSG(1, "Valid tags are: ");
129 for (i=0; i<DIM_OF(TAGS); ++i) {
131 WRITE_STR(1, TAGS[i].tag);
140 stringToTag(char const *str)
143 for (i=0; i<DIM_OF(TAGS); ++i)
144 if (strcmp(TAGS[i].tag, str)==0) return TAGS[i].val;
150 utsText2Tag(char const *str)
152 if (strcmp(str, "context") ==0) return vcVHI_CONTEXT;
153 else if (strcmp(str, "sysname") ==0) return vcVHI_SYSNAME;
154 else if (strcmp(str, "nodename") ==0) return vcVHI_NODENAME;
155 else if (strcmp(str, "release") ==0) return vcVHI_RELEASE;
156 else if (strcmp(str, "version") ==0) return vcVHI_VERSION;
157 else if (strcmp(str, "machine") ==0) return vcVHI_MACHINE;
158 else if (strcmp(str, "domainname")==0) return vcVHI_DOMAINNAME;
160 WRITE_MSG(2, "Unknown UTS tag\n");
170 if (!switchToWatchXid(&errptr)) {
175 if (access("/proc/uptime", R_OK)==-1) {
177 perror("access(\"/proc/uptime\")");
188 struct __user_cap_header_struct header;
189 struct __user_cap_data_struct user;
190 header.version = _LINUX_CAPABILITY_VERSION;
194 WRITE_MSG(2, "'VERIFYCAP' can be executed as root only\n");
198 // if( prctl( PR_SET_KEEPCAPS, 1,0,0,0 ) < 0 ) {
199 // perror( "prctl:" );
203 if (capget(&header, &user)==-1) {
210 user.inheritable = 0;
212 if (capset(&header, &user)==-1) {
217 return chroot("/")==-1;
223 int v = vc_get_version();
229 l = utilvserver_fmt_xulong(0, (unsigned int)v);
230 memcpy(buf, "0x00000000", 10);
231 utilvserver_fmt_xulong(buf+2+8-l, (unsigned int)v);
237 getCtxId(char *buf, const char *pid_str, xid_t (*get_id)(pid_t pid), const char *err_str)
239 pid_t pid = atoi(pid_str);
240 xid_t xid = get_id(pid);
242 if (xid==VC_NOCTX) perror(err_str);
244 utilvserver_fmt_long(buf, xid);
252 getXid(char *buf, char const *pid_str)
254 return getCtxId(buf, pid_str, vc_get_task_xid, "vc_get_task_xid()");
258 getNid(char *buf, const char *pid_str)
260 return getCtxId(buf, pid_str, vc_get_task_nid, "vc_get_task_nid()");
264 getTag(char *buf, const char *pid_str)
266 return getCtxId(buf, pid_str, vc_get_task_tag, "vc_get_task_tag()");
270 getPXid(char UNUSED *buf, char const UNUSED *vserver)
272 // TODO: implement me when available
277 getInitPid_native(char *buf, xid_t xid)
279 struct vc_vx_info info;
281 if (vc_get_vx_info(xid, &info)==-1) perror("vc_get_vx_info()");
283 utilvserver_fmt_long(buf, info.initpid);
290 #if defined(VC_ENABLE_API_COMPAT) || defined(VC_ENABLE_API_V11)
292 selectPid(struct dirent const *ent)
294 return atoi(ent->d_name)!=0;
298 getInitPid_internal(pid_t pid, xid_t xid, pid_t *res)
303 size_t bufsize = utilvserver_getProcEntryBufsize();
307 pos = utilvserver_getProcEntry(pid, "\ns_context: ", buf, bufsize);
308 if (pos==0 && errno==EAGAIN) continue;
310 if (pos==0 || (xid_t)atoi(pos)!=xid) return false;
313 pos = strstr(buf, "\ninitpid: ");
316 pos += sizeof("\ninitpid: ")-1;
317 if (strncmp(pos, "none", 4)==0) *res = -1;
318 else *res = atoi(pos);
326 getInitPid_emulated(char *buf, xid_t xid)
328 struct dirent **namelist;
331 switchToWatchXid(0); // ignore errors silently...
332 n = scandir("/proc", &namelist, selectPid, alphasort);
333 if (n<0) perror("scandir()");
336 if (!getInitPid_internal(atoi(namelist[n]->d_name), xid, &pid)) continue;
338 utilvserver_fmt_long(buf, pid);
344 #else // VC_ENABLE_API_COMPAT
346 getInitPid_emulated(char UNUSED *buf, xid_t UNUSED xid)
348 WRITE_MSG(2, "tools were built without compat API, getInitPid() not available\n");
351 #endif // VC_ENABLE_API_COMPAT
354 getInitPid(char *buf, xid_t xid)
356 if (vc_isSupported(vcFEATURE_VINFO))
357 return getInitPid_native(buf, xid);
359 return getInitPid_emulated(buf, xid);
363 getInitPidPid(char *buf, char const *vserver)
365 struct vc_vx_info info;
366 pid_t pid = atoi(vserver);
367 xid_t xid = vc_get_task_xid(pid);
369 if (xid==VC_NOCTX) perror("vc_get_task_xid()");
370 else if (vc_get_vx_info(xid, &info)==-1) perror("vc_get_vx_info()");
372 utilvserver_fmt_long(buf, info.initpid);
380 getUTS(char *buf, xid_t xid, size_t argc, char * argv[])
383 vc_uts_type type = utsText2Tag(argv[0]);
384 if (vc_get_vhi_name(xid, type, buf, sizeof(buf)-1)==-1)
385 perror("vc_get_vhi_name()");
390 bool is_passed = false;
392 #define APPEND_UTS(TYPE) \
393 (((vc_get_vhi_name(xid, TYPE, tmp, sizeof(tmp)-1)!=-1) && (strcat(buf, tmp), strcat(buf, " "), is_passed=true)) || \
394 (strcat(buf, "??? ")))
396 if (APPEND_UTS(vcVHI_CONTEXT) &&
397 APPEND_UTS(vcVHI_SYSNAME) &&
398 APPEND_UTS(vcVHI_NODENAME) &&
399 APPEND_UTS(vcVHI_RELEASE) &&
400 APPEND_UTS(vcVHI_VERSION) &&
401 APPEND_UTS(vcVHI_MACHINE) &&
402 APPEND_UTS(vcVHI_DOMAINNAME) &&
406 perror("vc_get_vhi_name()");
414 printSysInfo(char *buf)
416 int fd = open(PKGLIBDIR "/FEATURES.txt", O_RDONLY);
425 WRITE_STR(1, uts.release);
430 if (getAPIVer(buf)) WRITE_STR(1, buf);
431 else WRITE_MSG(1, "???");
434 " util-vserver: " PACKAGE_VERSION "; " __DATE__ ", " __TIME__"\n"
439 WRITE_MSG(1, "FEATURES.txt not found\n");
441 off_t l = Elseek(fd, 0, SEEK_END);
442 Elseek(fd, 0, SEEK_SET);
445 EreadAll(fd, buf, l);
446 EwriteAll(1, buf, l);
455 getContext(char *buf, char const *vserver, bool allow_only_static)
457 xid_t xid = vc_getVserverCtx(vserver, vcCFG_AUTO,
458 allow_only_static, 0, vcCTX_XID);
459 if (xid==VC_NOCTX) return 0;
461 utilvserver_fmt_long(buf, xid);
466 getXIDType(xid_t xid, int argc, char *argv[])
470 switch (vc_getXIDType(xid)) {
471 case vcTYPE_INVALID : tp = "invalid"; break;
472 case vcTYPE_MAIN : tp = "main"; break;
473 case vcTYPE_WATCH : tp = "watch"; break;
474 case vcTYPE_STATIC : tp = "static"; break;
475 case vcTYPE_DYNAMIC : tp = "dynamic"; break;
476 default : tp = 0; break;
479 if (argc==0 || tp==0)
484 if (strcasecmp(argv[argc], tp)==0) return tp;
491 testFeature(int argc, char *argv[])
493 return (argc>0 && vc_isSupportedString(argv[0])) ? EXIT_SUCCESS : EXIT_FAILURE;
497 str2bool(char const *str)
499 return atoi(str)!=0 || strchr("yYtT", str[0])!=0 || strcasecmp("true", str)==0;
503 execQuery(char const *vserver, VserverTag tag, int argc, char *argv[])
505 char const * res = 0;
506 char buf[sizeof(xid_t)*4 + 1024 + strlen(vserver)];
508 memset(buf, 0, sizeof buf);
510 case tgNAME : res = vc_getVserverName(vserver, vcCFG_AUTO); break;
512 res = vc_getVserverVdir(vserver, vcCFG_AUTO, argc>0 && atoi(argv[0]));
514 case tgCFGDIR : res = vc_getVserverCfgDir(vserver, vcCFG_AUTO); break;
516 res = vc_getVserverAppDir(vserver, vcCFG_AUTO, argc==0 ? "" : argv[0]);
520 signed long xid; // type is a small hack, but should be ok...
521 struct vc_vx_info info;
523 if (isNumber(vserver, &xid, true) && xid>=0)
524 res = (vc_get_vx_info(xid, &info)==-1) ? 0 : "1";
526 res = (vc_getVserverCtx(vserver, vcCFG_AUTO, false, 0, vcCTX_XID)==VC_NOCTX) ? 0 : "1";
532 strcpy(buf, vserver);
533 if (canonifyVserverName(buf)>0) res = buf;
536 case tgCONTEXT : res = getContext(buf, vserver,
537 argc==0 || str2bool(argv[0])); break;
538 case tgINITPID_PID : res = getInitPidPid(buf, vserver); break;
539 case tgAPIVER : res = getAPIVer(buf); break;
540 case tgXID : res = getXid(buf, vserver); break;
541 case tgPXID : res = getPXid(buf, vserver); break;
542 case tgSYSINFO : return printSysInfo(buf); break;
543 case tgFEATURE : return testFeature(argc,argv); break;
544 case tgVERIFYCAP : return verifyCap() ? 0 : 1; break;
545 case tgVERIFYPROC : return verifyProc() ? 0 : 1; break;
546 case tgNID : res = getNid(buf, vserver); break;
547 case tgTAG : res = getTag(buf, vserver); break;
551 xid_t xid = *vserver!='\0' ? vc_xidopt2xid(vserver,true,0) : VC_SAMECTX;
554 case tgID : res = vc_getVserverByCtx(xid,0,0); break;
555 case tgINITPID : res = getInitPid(buf, xid); break;
556 case tgUTS : res = getUTS(buf, xid, argc, argv); break;
557 case tgXIDTYPE : res = getXIDType(xid, argc, argv); break;
559 default : assert(false); abort(); // TODO
564 if (res==0) return EXIT_FAILURE;
570 int main(int argc, char *argv[])
573 char const * vserver;
577 int c = getopt_long(argc, argv, "ql", CMDLINE_OPTIONS, 0);
581 case 'h' : showHelp(1, argv[0], 0);
582 case 'v' : showVersion();
583 case 'l' : showTags();
584 case 'q' : quiet = true; break;
586 WRITE_MSG(2, "Try '");
587 WRITE_STR(2, argv[0]);
588 WRITE_MSG(2, " --help' for more information.\n");
595 execQuery("-", tgSYSINFO, 0, 0);
596 WRITE_MSG(2, "\nAssumed 'SYSINFO' as no other option given; try '--help' for more information.\n");
600 vserver = argv[optind];
601 tag = stringToTag(argv[optind+1]);
604 WRITE_MSG(2, "Unknown tag; use '-l' to get list of valid tags\n");
609 int fd = Eopen("/dev/null", O_WRONLY, 0644);
614 return execQuery(vserver, tag, argc-(optind+2), argv+optind+2);