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,
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" },
83 { "XIDTYPE", tgXIDTYPE, "returns the type of the given XID" },
86 int wrapper_exit_code = 1;
88 static struct option const
90 { "help", no_argument, 0, 'h' },
91 { "version", no_argument, 0, 'v' },
97 showHelp(int fd, char const *cmd, int res)
99 WRITE_MSG(fd, "Usage: ");
102 " [-ql] <vserver>|<pid>|<context> <tag>\n"
103 "Please report bugs to " PACKAGE_BUGREPORT "\n");
111 "vserver-info " VERSION " -- returns information about vservers\n"
112 "This program is part of " PACKAGE_STRING "\n\n"
113 "Copyright (C) 2003 Enrico Scholz\n"
114 VERSION_COPYRIGHT_DISCLAIMER);
121 char const * delim = "";
124 WRITE_MSG(1, "Valid tags are: ");
125 for (i=0; i<DIM_OF(TAGS); ++i) {
127 WRITE_STR(1, TAGS[i].tag);
136 stringToTag(char const *str)
139 for (i=0; i<DIM_OF(TAGS); ++i)
140 if (strcmp(TAGS[i].tag, str)==0) return TAGS[i].val;
146 utsText2Tag(char const *str)
148 if (strcmp(str, "context") ==0) return vcVHI_CONTEXT;
149 else if (strcmp(str, "sysname") ==0) return vcVHI_SYSNAME;
150 else if (strcmp(str, "nodename") ==0) return vcVHI_NODENAME;
151 else if (strcmp(str, "release") ==0) return vcVHI_RELEASE;
152 else if (strcmp(str, "version") ==0) return vcVHI_VERSION;
153 else if (strcmp(str, "machine") ==0) return vcVHI_MACHINE;
154 else if (strcmp(str, "domainname")==0) return vcVHI_DOMAINNAME;
156 WRITE_MSG(2, "Unknown UTS tag\n");
164 struct __user_cap_header_struct header;
165 struct __user_cap_data_struct user;
166 header.version = _LINUX_CAPABILITY_VERSION;
170 WRITE_MSG(2, "'VERIFYCAP' can be executed as root only\n");
174 // if( prctl( PR_SET_KEEPCAPS, 1,0,0,0 ) < 0 ) {
175 // perror( "prctl:" );
179 if (capget(&header, &user)==-1) {
186 user.inheritable = 0;
188 if (capset(&header, &user)==-1) {
193 return chroot("/")==-1;
199 int v = vc_get_version();
205 l = utilvserver_fmt_xulong(0, (unsigned int)v);
206 memcpy(buf, "0x00000000", 10);
207 utilvserver_fmt_xulong(buf+2+8-l, (unsigned int)v);
213 getXid(char *buf, char const *pid_str)
215 pid_t pid = atoi(pid_str);
216 xid_t xid = vc_get_task_xid(pid);
218 if (xid==VC_NOCTX) perror("vc_get_task_xid()");
220 utilvserver_fmt_long(buf, xid);
228 getPXid(char UNUSED *buf, char const UNUSED *vserver)
230 // TODO: implement me when available
235 getInitPid_native(char *buf, xid_t xid)
237 struct vc_vx_info info;
239 if (vc_get_vx_info(xid, &info)==-1) perror("vc_get_vx_info()");
241 utilvserver_fmt_long(buf, info.initpid);
248 #if defined(VC_ENABLE_API_COMPAT) || defined(VC_ENABLE_API_V11)
250 selectPid(struct dirent const *ent)
252 return atoi(ent->d_name)!=0;
256 getInitPid_internal(pid_t pid, xid_t xid, pid_t *res)
261 size_t bufsize = utilvserver_getProcEntryBufsize();
265 pos = utilvserver_getProcEntry(pid, "\ns_context: ", buf, bufsize);
266 if (pos==0 && errno==EAGAIN) continue;
268 if (pos==0 || (xid_t)atoi(pos)!=xid) return false;
271 pos = strstr(buf, "\ninitpid: ");
274 pos += sizeof("\ninitpid: ")-1;
275 if (strncmp(pos, "none", 4)==0) *res = -1;
276 else *res = atoi(pos);
284 getInitPid_emulated(char *buf, xid_t xid)
286 struct dirent **namelist;
289 switchToWatchXid(0); // ignore errors silently...
290 n = scandir("/proc", &namelist, selectPid, alphasort);
291 if (n<0) perror("scandir()");
294 if (!getInitPid_internal(atoi(namelist[n]->d_name), xid, &pid)) continue;
296 utilvserver_fmt_long(buf, pid);
302 #endif // VC_ENABLE_API_COMPAT
305 getInitPid(char *buf, xid_t xid)
307 if (vc_isSupported(vcFEATURE_VINFO))
308 return getInitPid_native(buf, xid);
310 return getInitPid_emulated(buf, xid);
314 getInitPidPid(char *buf, char const *vserver)
316 struct vc_vx_info info;
317 pid_t pid = atoi(vserver);
318 xid_t xid = vc_get_task_xid(pid);
320 if (xid==VC_NOCTX) perror("vc_get_task_xid()");
321 else if (vc_get_vx_info(xid, &info)==-1) perror("vc_get_vx_info()");
323 utilvserver_fmt_long(buf, info.initpid);
331 getUTS(char *buf, xid_t xid, size_t argc, char * argv[])
334 vc_uts_type type = utsText2Tag(argv[0]);
335 if (vc_get_vhi_name(xid, type, buf, sizeof(buf)-1)==-1)
336 perror("vc_get_vhi_name()");
341 bool is_passed = false;
343 #define APPEND_UTS(TYPE) \
344 (((vc_get_vhi_name(xid, TYPE, tmp, sizeof(tmp)-1)!=-1) && (strcat(buf, tmp), strcat(buf, " "), is_passed=true)) || \
345 (strcat(buf, "??? ")))
347 if (APPEND_UTS(vcVHI_CONTEXT) &&
348 APPEND_UTS(vcVHI_SYSNAME) &&
349 APPEND_UTS(vcVHI_NODENAME) &&
350 APPEND_UTS(vcVHI_RELEASE) &&
351 APPEND_UTS(vcVHI_VERSION) &&
352 APPEND_UTS(vcVHI_MACHINE) &&
353 APPEND_UTS(vcVHI_DOMAINNAME) &&
357 perror("vc_get_vhi_name()");
365 printSysInfo(char *buf)
367 int fd = open(PKGLIBDIR "/FEATURES.txt", O_RDONLY);
376 WRITE_STR(1, uts.release);
381 if (getAPIVer(buf)) WRITE_STR(1, buf);
382 else WRITE_MSG(1, "???");
385 " util-vserver: " PACKAGE_VERSION "; " __DATE__ ", " __TIME__"\n"
390 WRITE_MSG(1, "FEATURES.txt not found\n");
392 off_t l = Elseek(fd, 0, SEEK_END);
393 Elseek(fd, 0, SEEK_SET);
396 EreadAll(fd, buf, l);
397 EwriteAll(1, buf, l);
406 getContext(char *buf, char const *vserver, bool allow_only_static)
408 xid_t xid = vc_getVserverCtx(vserver, vcCFG_AUTO,
409 allow_only_static, 0);
410 if (xid==VC_NOCTX) return 0;
412 utilvserver_fmt_long(buf, xid);
417 getXIDType(xid_t xid, int argc, char *argv[])
421 switch (vc_getXIDType(xid)) {
422 case vcTYPE_INVALID : tp = "invalid"; break;
423 case vcTYPE_MAIN : tp = "main"; break;
424 case vcTYPE_WATCH : tp = "watch"; break;
425 case vcTYPE_STATIC : tp = "static"; break;
426 case vcTYPE_DYNAMIC : tp = "dynamic"; break;
427 default : tp = 0; break;
430 if (argc==0 || tp==0)
435 if (strcasecmp(argv[argc], tp)==0) return tp;
442 testFeature(int argc, char *argv[])
444 return (argc>0 && vc_isSupportedString(argv[0])) ? EXIT_SUCCESS : EXIT_FAILURE;
448 str2bool(char const *str)
450 return atoi(str)!=0 || strchr("yYtT", str[0])!=0 || strcasecmp("true", str)==0;
454 execQuery(char const *vserver, VserverTag tag, int argc, char *argv[])
456 char const * res = 0;
457 char buf[sizeof(xid_t)*4 + 1024 + strlen(vserver)];
459 memset(buf, 0, sizeof buf);
461 case tgNAME : res = vc_getVserverName(vserver, vcCFG_AUTO); break;
463 res = vc_getVserverVdir(vserver, vcCFG_AUTO, argc>0 && atoi(argv[0]));
465 case tgCFGDIR : res = vc_getVserverCfgDir(vserver, vcCFG_AUTO); break;
467 res = vc_getVserverAppDir(vserver, vcCFG_AUTO, argc==0 ? "" : argv[0]);
471 res = (vc_getVserverCtx(vserver, vcCFG_AUTO, false, 0)==VC_NOCTX) ? 0 : "1";
475 strcpy(buf, vserver);
476 if (canonifyVserverName(buf)>0) res = buf;
479 case tgCONTEXT : res = getContext(buf, vserver,
480 argc==0 || str2bool(argv[0])); break;
481 case tgINITPID_PID : res = getInitPidPid(buf, vserver); break;
482 case tgAPIVER : res = getAPIVer(buf); break;
483 case tgXID : res = getXid(buf, vserver); break;
484 case tgPXID : res = getPXid(buf, vserver); break;
485 case tgSYSINFO : return printSysInfo(buf); break;
486 case tgFEATURE : return testFeature(argc,argv); break;
487 case tgVERIFYCAP : return verifyCap() ? 0 : 1; break;
491 xid_t xid = *vserver!='\0' ? vc_xidopt2xid(vserver,true,0) : VC_SAMECTX;
494 case tgID : res = vc_getVserverByCtx(xid,0,0); break;
495 case tgINITPID : res = getInitPid(buf, xid); break;
496 case tgUTS : res = getUTS(buf, xid, argc, argv); break;
497 case tgXIDTYPE : res = getXIDType(xid, argc, argv); break;
499 default : assert(false); abort(); // TODO
504 if (res==0) return EXIT_FAILURE;
510 int main(int argc, char *argv[])
513 char const * vserver;
517 int c = getopt_long(argc, argv, "ql", CMDLINE_OPTIONS, 0);
521 case 'h' : showHelp(1, argv[0], 0);
522 case 'v' : showVersion();
523 case 'l' : showTags();
524 case 'q' : quiet = true; break;
526 WRITE_MSG(2, "Try '");
527 WRITE_STR(2, argv[0]);
528 WRITE_MSG(2, " --help\" for more information.\n");
535 execQuery("-", tgSYSINFO, 0, 0);
536 WRITE_MSG(2, "\nAssumed 'SYSINFO' as no other option given; try '--help' for more information.\n");
540 vserver = argv[optind];
541 tag = stringToTag(argv[optind+1]);
544 WRITE_MSG(2, "Unknown tag; use '-l' to get list of valid tags\n");
549 int fd = Eopen("/dev/null", O_WRONLY, 0644);
554 return execQuery(vserver, tag, argc-(optind+2), argv+optind+2);