--- /dev/null
+// $Id: vserver-info.c,v 1.23 2005/07/04 22:36:46 ensc Exp $ --*- c -*--
+
+// Copyright (C) 2003 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; version 2 of the License.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "lib/utils-legacy.h"
+#include "pathconfig.h"
+#include "util.h"
+
+#include "internal.h"
+#include "vserver.h"
+
+#include <stdlib.h>
+#include <getopt.h>
+#include <assert.h>
+#include <stdbool.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/utsname.h>
+#include <dirent.h>
+#include <strings.h>
+
+#define ENSC_WRAPPERS_FCNTL 1
+#define ENSC_WRAPPERS_IO 1
+#define ENSC_WRAPPERS_UNISTD 1
+#define ENSC_WRAPPERS_VSERVER 1
+#include <wrappers.h>
+
+#undef _POSIX_SOURCE
+#include "capability-compat.h"
+
+typedef enum { tgNONE,tgCONTEXT, tgID, tgRUNNING,
+ tgVDIR, tgNAME, tgCFGDIR, tgAPPDIR,
+ tgAPIVER, tgPXID,
+ tgINITPID, tgINITPID_PID,
+ tgXID, tgUTS, tgSYSINFO,
+ tgFEATURE, tgCANONIFY,
+ tgVERIFYCAP, tgXIDTYPE, tgVERIFYPROC,
+} VserverTag;
+
+static struct {
+ char const * const tag;
+ VserverTag const val;
+ char const * const descr;
+} const TAGS[] = {
+ { "CONTEXT", tgCONTEXT, ("the current and/or assigned context; when an optinal argument "
+ "evaluates to false,only the current context will be printed") },
+ { "ID", tgID, "gives out the vserver-id for the context-xid" },
+ { "RUNNING", tgRUNNING, "gives out '1' when vserver is running; else, it fails without output" },
+ { "VDIR", tgVDIR, "gives out the root-directory of the vserver" },
+ { "NAME", tgNAME, "gives out the name of the vserver" },
+ { "CFGDIR", tgCFGDIR, "gives out the configuration directory of the vserver" },
+ { "APPDIR", tgAPPDIR, "gives out the name of the toplevel application cfgdir" },
+ { "INITPID", tgINITPID, "gives out the initpid of the given context" },
+ { "INITPID_PID", tgINITPID_PID, "gives out the initpid of the given pid" },
+ { "XID", tgXID, "gives out the context-id of the given pid" },
+ { "APIVER", tgAPIVER, "gives out the version of the kernel API" },
+ { "UTS", tgUTS, ("gives out an uts-entry; possible entries are "
+ "context, sysname, nodename, release, version, "
+ "machine and domainname") },
+ { "SYSINFO", tgSYSINFO, "gives out information about the systen" },
+ { "FEATURE", tgFEATURE, "returns 0 iff the queried feature is supported" },
+ { "PXID", tgPXID, "returns the xid of the parent context" },
+ { "CANONIFY", tgCANONIFY, "canonifies the vserver-name and removes dangerous characters" },
+ { "VERIFYCAP", tgVERIFYCAP, "test if the kernel supports linux capabilities" },
+ { "VERIFYPROC", tgVERIFYPROC, "test if /proc can be read by contexts!=0" },
+ { "XIDTYPE", tgXIDTYPE, "returns the type of the given XID" },
+};
+
+int wrapper_exit_code = 1;
+
+static struct option const
+CMDLINE_OPTIONS[] = {
+ { "help", no_argument, 0, 'h' },
+ { "version", no_argument, 0, 'v' },
+ { 0,0,0,0 }
+};
+
+
+static void
+showHelp(int fd, char const *cmd, int res)
+{
+ WRITE_MSG(fd, "Usage: ");
+ WRITE_STR(fd, cmd);
+ WRITE_MSG(fd,
+ " [-ql] <vserver>|<pid>|<context> <tag>\n"
+ "Please report bugs to " PACKAGE_BUGREPORT "\n");
+ exit(res);
+}
+
+static void
+showVersion()
+{
+ WRITE_MSG(1,
+ "vserver-info " VERSION " -- returns information about vservers\n"
+ "This program is part of " PACKAGE_STRING "\n\n"
+ "Copyright (C) 2003 Enrico Scholz\n"
+ VERSION_COPYRIGHT_DISCLAIMER);
+ exit(0);
+}
+
+static void
+showTags()
+{
+ char const * delim = "";
+ size_t i;
+
+ WRITE_MSG(1, "Valid tags are: ");
+ for (i=0; i<DIM_OF(TAGS); ++i) {
+ WRITE_STR(1, delim);
+ WRITE_STR(1, TAGS[i].tag);
+
+ delim = ", ";
+ }
+ WRITE_MSG(1, "\n");
+ exit(0);
+}
+
+static VserverTag
+stringToTag(char const *str)
+{
+ size_t i;
+ for (i=0; i<DIM_OF(TAGS); ++i)
+ if (strcmp(TAGS[i].tag, str)==0) return TAGS[i].val;
+
+ return tgNONE;
+}
+
+static vc_uts_type
+utsText2Tag(char const *str)
+{
+ if (strcmp(str, "context") ==0) return vcVHI_CONTEXT;
+ else if (strcmp(str, "sysname") ==0) return vcVHI_SYSNAME;
+ else if (strcmp(str, "nodename") ==0) return vcVHI_NODENAME;
+ else if (strcmp(str, "release") ==0) return vcVHI_RELEASE;
+ else if (strcmp(str, "version") ==0) return vcVHI_VERSION;
+ else if (strcmp(str, "machine") ==0) return vcVHI_MACHINE;
+ else if (strcmp(str, "domainname")==0) return vcVHI_DOMAINNAME;
+ else {
+ WRITE_MSG(2, "Unknown UTS tag\n");
+ exit(1);
+ }
+}
+
+static bool
+verifyProc()
+{
+ char const *errptr;
+
+ if (!switchToWatchXid(&errptr)) {
+ perror(errptr);
+ return false;
+ }
+
+ if (access("/proc/uptime", R_OK)==-1) {
+ if (errno!=ENOENT)
+ perror("access(\"/proc/uptime\")");
+
+ return false;
+ }
+
+ return true;
+}
+
+static bool
+verifyCap()
+{
+ struct __user_cap_header_struct header;
+ struct __user_cap_data_struct user;
+ header.version = _LINUX_CAPABILITY_VERSION;
+ header.pid = 0;
+
+ if (getuid()!=0) {
+ WRITE_MSG(2, "'VERIFYCAP' can be executed as root only\n");
+ return false;
+ }
+
+// if( prctl( PR_SET_KEEPCAPS, 1,0,0,0 ) < 0 ) {
+// perror( "prctl:" );
+// return false;
+// }
+
+ if (capget(&header, &user)==-1) {
+ perror("capget()");
+ return false;
+ }
+
+ user.effective = 0;
+ user.permitted = 0;
+ user.inheritable = 0;
+
+ if (capset(&header, &user)==-1) {
+ perror("capset()");
+ return false;
+ }
+
+ return chroot("/")==-1;
+}
+
+static char *
+getAPIVer(char *buf)
+{
+ int v = vc_get_version();
+ size_t l;
+
+ if (v==-1) return 0;
+
+
+ l = utilvserver_fmt_xulong(0, (unsigned int)v);
+ memcpy(buf, "0x00000000", 10);
+ utilvserver_fmt_xulong(buf+2+8-l, (unsigned int)v);
+
+ return buf;
+}
+
+static char *
+getXid(char *buf, char const *pid_str)
+{
+ pid_t pid = atoi(pid_str);
+ xid_t xid = vc_get_task_xid(pid);
+
+ if (xid==VC_NOCTX) perror("vc_get_task_xid()");
+ else {
+ utilvserver_fmt_long(buf, xid);
+ return buf;
+ }
+
+ return 0;
+}
+
+static char *
+getPXid(char UNUSED *buf, char const UNUSED *vserver)
+{
+ // TODO: implement me when available
+ return 0;
+}
+
+static char *
+getInitPid_native(char *buf, xid_t xid)
+{
+ struct vc_vx_info info;
+
+ if (vc_get_vx_info(xid, &info)==-1) perror("vc_get_vx_info()");
+ else {
+ utilvserver_fmt_long(buf, info.initpid);
+ return buf;
+ }
+
+ return 0;
+}
+
+#if defined(VC_ENABLE_API_COMPAT) || defined(VC_ENABLE_API_V11)
+static int
+selectPid(struct dirent const *ent)
+{
+ return atoi(ent->d_name)!=0;
+}
+
+static bool
+getInitPid_internal(pid_t pid, xid_t xid, pid_t *res)
+{
+ *res = -1;
+
+ for (;*res==-1;) {
+ size_t bufsize = utilvserver_getProcEntryBufsize();
+ char buf[bufsize+1];
+ char *pos = 0;
+
+ pos = utilvserver_getProcEntry(pid, "\ns_context: ", buf, bufsize);
+ if (pos==0 && errno==EAGAIN) continue;
+
+ if (pos==0 || (xid_t)atoi(pos)!=xid) return false;
+
+ buf[bufsize] = '\0';
+ pos = strstr(buf, "\ninitpid: ");
+
+ if (pos!=0) {
+ pos += sizeof("\ninitpid: ")-1;
+ if (strncmp(pos, "none", 4)==0) *res = -1;
+ else *res = atoi(pos);
+ }
+ }
+
+ return true;
+}
+
+static char *
+getInitPid_emulated(char *buf, xid_t xid)
+{
+ struct dirent **namelist;
+ int n;
+
+ switchToWatchXid(0); // ignore errors silently...
+ n = scandir("/proc", &namelist, selectPid, alphasort);
+ if (n<0) perror("scandir()");
+ else while (n--) {
+ pid_t pid;
+ if (!getInitPid_internal(atoi(namelist[n]->d_name), xid, &pid)) continue;
+
+ utilvserver_fmt_long(buf, pid);
+ return buf;
+ }
+
+ return 0;
+}
+#endif // VC_ENABLE_API_COMPAT
+
+static char *
+getInitPid(char *buf, xid_t xid)
+{
+ if (vc_isSupported(vcFEATURE_VINFO))
+ return getInitPid_native(buf, xid);
+ else
+ return getInitPid_emulated(buf, xid);
+}
+
+static char *
+getInitPidPid(char *buf, char const *vserver)
+{
+ struct vc_vx_info info;
+ pid_t pid = atoi(vserver);
+ xid_t xid = vc_get_task_xid(pid);
+
+ if (xid==VC_NOCTX) perror("vc_get_task_xid()");
+ else if (vc_get_vx_info(xid, &info)==-1) perror("vc_get_vx_info()");
+ else {
+ utilvserver_fmt_long(buf, info.initpid);
+ return buf;
+ }
+
+ return 0;
+}
+
+static char *
+getUTS(char *buf, xid_t xid, size_t argc, char * argv[])
+{
+ if (argc>0) {
+ vc_uts_type type = utsText2Tag(argv[0]);
+ if (vc_get_vhi_name(xid, type, buf, sizeof(buf)-1)==-1)
+ perror("vc_get_vhi_name()");
+ else
+ return buf;
+ }
+ else {
+ bool is_passed = false;
+ char tmp[128];
+#define APPEND_UTS(TYPE) \
+ (((vc_get_vhi_name(xid, TYPE, tmp, sizeof(tmp)-1)!=-1) && (strcat(buf, tmp), strcat(buf, " "), is_passed=true)) || \
+ (strcat(buf, "??? ")))
+
+ if (APPEND_UTS(vcVHI_CONTEXT) &&
+ APPEND_UTS(vcVHI_SYSNAME) &&
+ APPEND_UTS(vcVHI_NODENAME) &&
+ APPEND_UTS(vcVHI_RELEASE) &&
+ APPEND_UTS(vcVHI_VERSION) &&
+ APPEND_UTS(vcVHI_MACHINE) &&
+ APPEND_UTS(vcVHI_DOMAINNAME) &&
+ is_passed)
+ return buf;
+
+ perror("vc_get_vhi_name()");
+#undef APPEND_UTS
+ }
+
+ return 0;
+}
+
+static int
+printSysInfo(char *buf)
+{
+ int fd = open(PKGLIBDIR "/FEATURES.txt", O_RDONLY);
+ struct utsname uts;
+
+ if (uname(&uts)==-1)
+ perror("uname()");
+ else {
+ WRITE_MSG(1,
+ "Versions:\n"
+ " Kernel: ");
+ WRITE_STR(1, uts.release);
+ WRITE_MSG(1, "\n"
+ " VS-API: ");
+
+ memset(buf, 0, 128);
+ if (getAPIVer(buf)) WRITE_STR(1, buf);
+ else WRITE_MSG(1, "???");
+
+ WRITE_MSG(1, "\n"
+ " util-vserver: " PACKAGE_VERSION "; " __DATE__ ", " __TIME__"\n"
+ "\n");
+ }
+
+ if (fd==-1)
+ WRITE_MSG(1, "FEATURES.txt not found\n");
+ else {
+ off_t l = Elseek(fd, 0, SEEK_END);
+ Elseek(fd, 0, SEEK_SET);
+ {
+ char buf[l];
+ EreadAll(fd, buf, l);
+ EwriteAll(1, buf, l);
+ }
+ Eclose(fd);
+ }
+
+ return EXIT_SUCCESS;
+}
+
+static char *
+getContext(char *buf, char const *vserver, bool allow_only_static)
+{
+ xid_t xid = vc_getVserverCtx(vserver, vcCFG_AUTO,
+ allow_only_static, 0);
+ if (xid==VC_NOCTX) return 0;
+
+ utilvserver_fmt_long(buf, xid);
+ return buf;
+}
+
+static char const *
+getXIDType(xid_t xid, int argc, char *argv[])
+{
+ char const * tp;
+
+ switch (vc_getXIDType(xid)) {
+ case vcTYPE_INVALID : tp = "invalid"; break;
+ case vcTYPE_MAIN : tp = "main"; break;
+ case vcTYPE_WATCH : tp = "watch"; break;
+ case vcTYPE_STATIC : tp = "static"; break;
+ case vcTYPE_DYNAMIC : tp = "dynamic"; break;
+ default : tp = 0; break;
+ }
+
+ if (argc==0 || tp==0)
+ return tp;
+
+ while (argc>0) {
+ --argc;
+ if (strcasecmp(argv[argc], tp)==0) return tp;
+ }
+
+ return 0;
+}
+
+static int
+testFeature(int argc, char *argv[])
+{
+ return (argc>0 && vc_isSupportedString(argv[0])) ? EXIT_SUCCESS : EXIT_FAILURE;
+}
+
+static bool
+str2bool(char const *str)
+{
+ return atoi(str)!=0 || strchr("yYtT", str[0])!=0 || strcasecmp("true", str)==0;
+}
+
+static int
+execQuery(char const *vserver, VserverTag tag, int argc, char *argv[])
+{
+ char const * res = 0;
+ char buf[sizeof(xid_t)*4 + 1024 + strlen(vserver)];
+
+ memset(buf, 0, sizeof buf);
+ switch (tag) {
+ case tgNAME : res = vc_getVserverName(vserver, vcCFG_AUTO); break;
+ case tgVDIR :
+ res = vc_getVserverVdir(vserver, vcCFG_AUTO, argc>0 && atoi(argv[0]));
+ break;
+ case tgCFGDIR : res = vc_getVserverCfgDir(vserver, vcCFG_AUTO); break;
+ case tgAPPDIR :
+ res = vc_getVserverAppDir(vserver, vcCFG_AUTO, argc==0 ? "" : argv[0]);
+ break;
+
+ case tgRUNNING : {
+ signed long xid; // type is a small hack, but should be ok...
+ struct vc_vx_info info;
+
+ if (isNumber(vserver, &xid) && xid>=0)
+ res = (vc_get_vx_info(xid, &info)==-1) ? 0 : "1";
+ else
+ res = (vc_getVserverCtx(vserver, vcCFG_AUTO, false, 0)==VC_NOCTX) ? 0 : "1";
+
+ break;
+ }
+
+ case tgCANONIFY :
+ strcpy(buf, vserver);
+ if (canonifyVserverName(buf)>0) res = buf;
+ break;
+
+ case tgCONTEXT : res = getContext(buf, vserver,
+ argc==0 || str2bool(argv[0])); break;
+ case tgINITPID_PID : res = getInitPidPid(buf, vserver); break;
+ case tgAPIVER : res = getAPIVer(buf); break;
+ case tgXID : res = getXid(buf, vserver); break;
+ case tgPXID : res = getPXid(buf, vserver); break;
+ case tgSYSINFO : return printSysInfo(buf); break;
+ case tgFEATURE : return testFeature(argc,argv); break;
+ case tgVERIFYCAP : return verifyCap() ? 0 : 1; break;
+ case tgVERIFYPROC : return verifyProc() ? 0 : 1; break;
+
+
+ default : {
+ xid_t xid = *vserver!='\0' ? vc_xidopt2xid(vserver,true,0) : VC_SAMECTX;
+
+ switch (tag) {
+ case tgID : res = vc_getVserverByCtx(xid,0,0); break;
+ case tgINITPID : res = getInitPid(buf, xid); break;
+ case tgUTS : res = getUTS(buf, xid, argc, argv); break;
+ case tgXIDTYPE : res = getXIDType(xid, argc, argv); break;
+
+ default : assert(false); abort(); // TODO
+ }
+ }
+ }
+
+ if (res==0) return EXIT_FAILURE;
+ WRITE_STR(1, res);
+ WRITE_MSG(1, "\n");
+ return EXIT_SUCCESS;
+}
+
+int main(int argc, char *argv[])
+{
+ bool quiet = false;
+ char const * vserver;
+ VserverTag tag;
+
+ while (1) {
+ int c = getopt_long(argc, argv, "ql", CMDLINE_OPTIONS, 0);
+ if (c==-1) break;
+
+ switch (c) {
+ case 'h' : showHelp(1, argv[0], 0);
+ case 'v' : showVersion();
+ case 'l' : showTags();
+ case 'q' : quiet = true; break;
+ default :
+ WRITE_MSG(2, "Try '");
+ WRITE_STR(2, argv[0]);
+ WRITE_MSG(2, " --help\" for more information.\n");
+ exit(1);
+ break;
+ }
+ }
+
+ if (optind+2>argc) {
+ execQuery("-", tgSYSINFO, 0, 0);
+ WRITE_MSG(2, "\nAssumed 'SYSINFO' as no other option given; try '--help' for more information.\n");
+ exit(0);
+ }
+
+ vserver = argv[optind];
+ tag = stringToTag(argv[optind+1]);
+
+ if (tag==tgNONE) {
+ WRITE_MSG(2, "Unknown tag; use '-l' to get list of valid tags\n");
+ exit(1);
+ }
+
+ if (quiet) {
+ int fd = Eopen("/dev/null", O_WRONLY, 0644);
+ Edup2(fd, 1);
+ Eclose(fd);
+ }
+
+ return execQuery(vserver, tag, argc-(optind+2), argv+optind+2);
+}
git://git.onelab.eu / util-vserver.git / blobdiff