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,
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 { "VERIFYPROC", tgVERIFYPROC, "test if /proc can be read by contexts!=0" },
84 { "XIDTYPE", tgXIDTYPE, "returns the type of the given XID" },
87 int wrapper_exit_code = 1;
89 static struct option const
91 { "help", no_argument, 0, 'h' },
92 { "version", no_argument, 0, 'v' },
98 showHelp(int fd, char const *cmd, int res)
100 WRITE_MSG(fd, "Usage: ");
103 " [-ql] <vserver>|<pid>|<context> <tag>\n"
104 "Please report bugs to " PACKAGE_BUGREPORT "\n");
112 "vserver-info " VERSION " -- returns information about vservers\n"
113 "This program is part of " PACKAGE_STRING "\n\n"
114 "Copyright (C) 2003 Enrico Scholz\n"
115 VERSION_COPYRIGHT_DISCLAIMER);
122 char const * delim = "";
125 WRITE_MSG(1, "Valid tags are: ");
126 for (i=0; i<DIM_OF(TAGS); ++i) {
128 WRITE_STR(1, TAGS[i].tag);
137 stringToTag(char const *str)
140 for (i=0; i<DIM_OF(TAGS); ++i)
141 if (strcmp(TAGS[i].tag, str)==0) return TAGS[i].val;
147 utsText2Tag(char const *str)
149 if (strcmp(str, "context") ==0) return vcVHI_CONTEXT;
150 else if (strcmp(str, "sysname") ==0) return vcVHI_SYSNAME;
151 else if (strcmp(str, "nodename") ==0) return vcVHI_NODENAME;
152 else if (strcmp(str, "release") ==0) return vcVHI_RELEASE;
153 else if (strcmp(str, "version") ==0) return vcVHI_VERSION;
154 else if (strcmp(str, "machine") ==0) return vcVHI_MACHINE;
155 else if (strcmp(str, "domainname")==0) return vcVHI_DOMAINNAME;
157 WRITE_MSG(2, "Unknown UTS tag\n");
167 if (!switchToWatchXid(&errptr)) {
172 if (access("/proc/uptime", R_OK)==-1) {
174 perror("access(\"/proc/uptime\")");
185 struct __user_cap_header_struct header;
186 struct __user_cap_data_struct user;
187 header.version = _LINUX_CAPABILITY_VERSION;
191 WRITE_MSG(2, "'VERIFYCAP' can be executed as root only\n");
195 // if( prctl( PR_SET_KEEPCAPS, 1,0,0,0 ) < 0 ) {
196 // perror( "prctl:" );
200 if (capget(&header, &user)==-1) {
207 user.inheritable = 0;
209 if (capset(&header, &user)==-1) {
214 return chroot("/")==-1;
220 int v = vc_get_version();
226 l = utilvserver_fmt_xulong(0, (unsigned int)v);
227 memcpy(buf, "0x00000000", 10);
228 utilvserver_fmt_xulong(buf+2+8-l, (unsigned int)v);
234 getXid(char *buf, char const *pid_str)
236 pid_t pid = atoi(pid_str);
237 xid_t xid = vc_get_task_xid(pid);
239 if (xid==VC_NOCTX) perror("vc_get_task_xid()");
241 utilvserver_fmt_long(buf, xid);
249 getPXid(char UNUSED *buf, char const UNUSED *vserver)
251 // TODO: implement me when available
256 getInitPid_native(char *buf, xid_t xid)
258 struct vc_vx_info info;
260 if (vc_get_vx_info(xid, &info)==-1) perror("vc_get_vx_info()");
262 utilvserver_fmt_long(buf, info.initpid);
269 #if defined(VC_ENABLE_API_COMPAT) || defined(VC_ENABLE_API_V11)
271 selectPid(struct dirent const *ent)
273 return atoi(ent->d_name)!=0;
277 getInitPid_internal(pid_t pid, xid_t xid, pid_t *res)
282 size_t bufsize = utilvserver_getProcEntryBufsize();
286 pos = utilvserver_getProcEntry(pid, "\ns_context: ", buf, bufsize);
287 if (pos==0 && errno==EAGAIN) continue;
289 if (pos==0 || (xid_t)atoi(pos)!=xid) return false;
292 pos = strstr(buf, "\ninitpid: ");
295 pos += sizeof("\ninitpid: ")-1;
296 if (strncmp(pos, "none", 4)==0) *res = -1;
297 else *res = atoi(pos);
305 getInitPid_emulated(char *buf, xid_t xid)
307 struct dirent **namelist;
310 switchToWatchXid(0); // ignore errors silently...
311 n = scandir("/proc", &namelist, selectPid, alphasort);
312 if (n<0) perror("scandir()");
315 if (!getInitPid_internal(atoi(namelist[n]->d_name), xid, &pid)) continue;
317 utilvserver_fmt_long(buf, pid);
323 #endif // VC_ENABLE_API_COMPAT
326 getInitPid(char *buf, xid_t xid)
328 if (vc_isSupported(vcFEATURE_VINFO))
329 return getInitPid_native(buf, xid);
331 return getInitPid_emulated(buf, xid);
335 getInitPidPid(char *buf, char const *vserver)
337 struct vc_vx_info info;
338 pid_t pid = atoi(vserver);
339 xid_t xid = vc_get_task_xid(pid);
341 if (xid==VC_NOCTX) perror("vc_get_task_xid()");
342 else if (vc_get_vx_info(xid, &info)==-1) perror("vc_get_vx_info()");
344 utilvserver_fmt_long(buf, info.initpid);
352 getUTS(char *buf, xid_t xid, size_t argc, char * argv[])
355 vc_uts_type type = utsText2Tag(argv[0]);
356 if (vc_get_vhi_name(xid, type, buf, sizeof(buf)-1)==-1)
357 perror("vc_get_vhi_name()");
362 bool is_passed = false;
364 #define APPEND_UTS(TYPE) \
365 (((vc_get_vhi_name(xid, TYPE, tmp, sizeof(tmp)-1)!=-1) && (strcat(buf, tmp), strcat(buf, " "), is_passed=true)) || \
366 (strcat(buf, "??? ")))
368 if (APPEND_UTS(vcVHI_CONTEXT) &&
369 APPEND_UTS(vcVHI_SYSNAME) &&
370 APPEND_UTS(vcVHI_NODENAME) &&
371 APPEND_UTS(vcVHI_RELEASE) &&
372 APPEND_UTS(vcVHI_VERSION) &&
373 APPEND_UTS(vcVHI_MACHINE) &&
374 APPEND_UTS(vcVHI_DOMAINNAME) &&
378 perror("vc_get_vhi_name()");
386 printSysInfo(char *buf)
388 int fd = open(PKGLIBDIR "/FEATURES.txt", O_RDONLY);
397 WRITE_STR(1, uts.release);
402 if (getAPIVer(buf)) WRITE_STR(1, buf);
403 else WRITE_MSG(1, "???");
406 " util-vserver: " PACKAGE_VERSION "; " __DATE__ ", " __TIME__"\n"
411 WRITE_MSG(1, "FEATURES.txt not found\n");
413 off_t l = Elseek(fd, 0, SEEK_END);
414 Elseek(fd, 0, SEEK_SET);
417 EreadAll(fd, buf, l);
418 EwriteAll(1, buf, l);
427 getContext(char *buf, char const *vserver, bool allow_only_static)
429 xid_t xid = vc_getVserverCtx(vserver, vcCFG_AUTO,
430 allow_only_static, 0);
431 if (xid==VC_NOCTX) return 0;
433 utilvserver_fmt_long(buf, xid);
438 getXIDType(xid_t xid, int argc, char *argv[])
442 switch (vc_getXIDType(xid)) {
443 case vcTYPE_INVALID : tp = "invalid"; break;
444 case vcTYPE_MAIN : tp = "main"; break;
445 case vcTYPE_WATCH : tp = "watch"; break;
446 case vcTYPE_STATIC : tp = "static"; break;
447 case vcTYPE_DYNAMIC : tp = "dynamic"; break;
448 default : tp = 0; break;
451 if (argc==0 || tp==0)
456 if (strcasecmp(argv[argc], tp)==0) return tp;
463 testFeature(int argc, char *argv[])
465 return (argc>0 && vc_isSupportedString(argv[0])) ? EXIT_SUCCESS : EXIT_FAILURE;
469 str2bool(char const *str)
471 return atoi(str)!=0 || strchr("yYtT", str[0])!=0 || strcasecmp("true", str)==0;
475 execQuery(char const *vserver, VserverTag tag, int argc, char *argv[])
477 char const * res = 0;
478 char buf[sizeof(xid_t)*4 + 1024 + strlen(vserver)];
480 memset(buf, 0, sizeof buf);
482 case tgNAME : res = vc_getVserverName(vserver, vcCFG_AUTO); break;
484 res = vc_getVserverVdir(vserver, vcCFG_AUTO, argc>0 && atoi(argv[0]));
486 case tgCFGDIR : res = vc_getVserverCfgDir(vserver, vcCFG_AUTO); break;
488 res = vc_getVserverAppDir(vserver, vcCFG_AUTO, argc==0 ? "" : argv[0]);
492 signed long xid; // type is a small hack, but should be ok...
493 struct vc_vx_info info;
495 if (isNumber(vserver, &xid) && xid>=0)
496 res = (vc_get_vx_info(xid, &info)==-1) ? 0 : "1";
498 res = (vc_getVserverCtx(vserver, vcCFG_AUTO, false, 0)==VC_NOCTX) ? 0 : "1";
504 strcpy(buf, vserver);
505 if (canonifyVserverName(buf)>0) res = buf;
508 case tgCONTEXT : res = getContext(buf, vserver,
509 argc==0 || str2bool(argv[0])); break;
510 case tgINITPID_PID : res = getInitPidPid(buf, vserver); break;
511 case tgAPIVER : res = getAPIVer(buf); break;
512 case tgXID : res = getXid(buf, vserver); break;
513 case tgPXID : res = getPXid(buf, vserver); break;
514 case tgSYSINFO : return printSysInfo(buf); break;
515 case tgFEATURE : return testFeature(argc,argv); break;
516 case tgVERIFYCAP : return verifyCap() ? 0 : 1; break;
517 case tgVERIFYPROC : return verifyProc() ? 0 : 1; break;
521 xid_t xid = *vserver!='\0' ? vc_xidopt2xid(vserver,true,0) : VC_SAMECTX;
524 case tgID : res = vc_getVserverByCtx(xid,0,0); break;
525 case tgINITPID : res = getInitPid(buf, xid); break;
526 case tgUTS : res = getUTS(buf, xid, argc, argv); break;
527 case tgXIDTYPE : res = getXIDType(xid, argc, argv); break;
529 default : assert(false); abort(); // TODO
534 if (res==0) return EXIT_FAILURE;
540 int main(int argc, char *argv[])
543 char const * vserver;
547 int c = getopt_long(argc, argv, "ql", CMDLINE_OPTIONS, 0);
551 case 'h' : showHelp(1, argv[0], 0);
552 case 'v' : showVersion();
553 case 'l' : showTags();
554 case 'q' : quiet = true; break;
556 WRITE_MSG(2, "Try '");
557 WRITE_STR(2, argv[0]);
558 WRITE_MSG(2, " --help\" for more information.\n");
565 execQuery("-", tgSYSINFO, 0, 0);
566 WRITE_MSG(2, "\nAssumed 'SYSINFO' as no other option given; try '--help' for more information.\n");
570 vserver = argv[optind];
571 tag = stringToTag(argv[optind+1]);
574 WRITE_MSG(2, "Unknown tag; use '-l' to get list of valid tags\n");
579 int fd = Eopen("/dev/null", O_WRONLY, 0644);
584 return execQuery(vserver, tag, argc-(optind+2), argv+optind+2);