fstat.c revision 1.10
1 /*- 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static char copyright[] = 36 "@(#) Copyright (c) 1988, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 static char sccsid[] = "@(#)fstat.c 8.1 (Berkeley) 6/6/93"; 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <sys/time.h> 46 #include <sys/proc.h> 47 #include <sys/user.h> 48 #include <sys/stat.h> 49 #include <sys/vnode.h> 50 #include <sys/socket.h> 51 #include <sys/socketvar.h> 52 #include <sys/domain.h> 53 #include <sys/protosw.h> 54 #include <sys/unpcb.h> 55 #include <sys/sysctl.h> 56 #include <sys/filedesc.h> 57 #define KERNEL 58 #include <sys/file.h> 59 #include <ufs/ufs/quota.h> 60 #include <ufs/ufs/inode.h> 61 #undef KERNEL 62 #define NFS 63 #include <sys/mount.h> 64 #include <nfs/nfsv2.h> 65 #include <nfs/rpcv2.h> 66 #include <nfs/nfs.h> 67 #include <nfs/nfsnode.h> 68 #undef NFS 69 70 #include <net/route.h> 71 #include <netinet/in.h> 72 #include <netinet/in_systm.h> 73 #include <netinet/ip.h> 74 #include <netinet/in_pcb.h> 75 76 #include <ctype.h> 77 #include <errno.h> 78 #include <kvm.h> 79 #include <nlist.h> 80 #include <paths.h> 81 #include <pwd.h> 82 #include <stdio.h> 83 #include <stdlib.h> 84 #include <string.h> 85 86 #define TEXT -1 87 #define CDIR -2 88 #define RDIR -3 89 #define TRACE -4 90 91 typedef struct devs { 92 struct devs *next; 93 long fsid; 94 ino_t ino; 95 char *name; 96 } DEVS; 97 DEVS *devs; 98 99 struct filestat { 100 long fsid; 101 long fileid; 102 mode_t mode; 103 u_long size; 104 dev_t rdev; 105 }; 106 107 #ifdef notdef 108 struct nlist nl[] = { 109 { "" }, 110 }; 111 #endif 112 113 int fsflg, /* show files on same filesystem as file(s) argument */ 114 pflg, /* show files open by a particular pid */ 115 uflg; /* show files open by a particular (effective) user */ 116 int checkfile; /* true if restricting to particular files or filesystems */ 117 int nflg; /* (numerical) display f.s. and rdev as dev_t */ 118 int vflg; /* display errors in locating kernel data objects etc... */ 119 120 #define dprintf if (vflg) fprintf 121 122 struct file **ofiles; /* buffer of pointers to file structures */ 123 int maxfiles; 124 #define ALLOC_OFILES(d) \ 125 if ((d) > maxfiles) { \ 126 free(ofiles); \ 127 ofiles = malloc((d) * sizeof(struct file *)); \ 128 if (ofiles == NULL) { \ 129 fprintf(stderr, "fstat: %s\n", strerror(errno)); \ 130 exit(1); \ 131 } \ 132 maxfiles = (d); \ 133 } 134 135 /* 136 * a kvm_read that returns true if everything is read 137 */ 138 #define KVM_READ(kaddr, paddr, len) \ 139 (kvm_read(kd, (u_long)(kaddr), (char *)(paddr), (len)) == (len)) 140 141 kvm_t *kd; 142 143 int ufs_filestat(), nfs_filestat(); 144 void dofiles(), getinetproto(), socktrans(); 145 void usage(), vtrans(); 146 147 main(argc, argv) 148 int argc; 149 char **argv; 150 { 151 extern char *optarg; 152 extern int optind; 153 register struct passwd *passwd; 154 struct kinfo_proc *p, *plast; 155 int arg, ch, what; 156 char *memf, *nlistf; 157 int cnt; 158 159 arg = 0; 160 what = KERN_PROC_ALL; 161 nlistf = memf = NULL; 162 while ((ch = getopt(argc, argv, "fnp:u:vNM")) != EOF) 163 switch((char)ch) { 164 case 'f': 165 fsflg = 1; 166 break; 167 case 'M': 168 memf = optarg; 169 break; 170 case 'N': 171 nlistf = optarg; 172 break; 173 case 'n': 174 nflg = 1; 175 break; 176 case 'p': 177 if (pflg++) 178 usage(); 179 if (!isdigit(*optarg)) { 180 fprintf(stderr, 181 "fstat: -p requires a process id\n"); 182 usage(); 183 } 184 what = KERN_PROC_PID; 185 arg = atoi(optarg); 186 break; 187 case 'u': 188 if (uflg++) 189 usage(); 190 if (!(passwd = getpwnam(optarg))) { 191 fprintf(stderr, "%s: unknown uid\n", 192 optarg); 193 exit(1); 194 } 195 what = KERN_PROC_UID; 196 arg = passwd->pw_uid; 197 break; 198 case 'v': 199 vflg = 1; 200 break; 201 case '?': 202 default: 203 usage(); 204 } 205 206 if (*(argv += optind)) { 207 for (; *argv; ++argv) { 208 if (getfname(*argv)) 209 checkfile = 1; 210 } 211 if (!checkfile) /* file(s) specified, but none accessable */ 212 exit(1); 213 } 214 215 ALLOC_OFILES(256); /* reserve space for file pointers */ 216 217 if (fsflg && !checkfile) { 218 /* -f with no files means use wd */ 219 if (getfname(".") == 0) 220 exit(1); 221 checkfile = 1; 222 } 223 224 /* 225 * Discard setgid privileges if not the running kernel so that bad 226 * guys can't print interesting stuff from kernel memory. 227 */ 228 if (nlistf != NULL || memf != NULL) 229 setgid(getgid()); 230 231 if ((kd = kvm_open(nlistf, memf, NULL, O_RDONLY, NULL)) == NULL) { 232 fprintf(stderr, "fstat: %s\n", kvm_geterr(kd)); 233 exit(1); 234 } 235 #ifdef notdef 236 if (kvm_nlist(kd, nl) != 0) { 237 fprintf(stderr, "fstat: no namelist: %s\n", kvm_geterr(kd)); 238 exit(1); 239 } 240 #endif 241 if ((p = kvm_getprocs(kd, what, arg, &cnt)) == NULL) { 242 fprintf(stderr, "fstat: %s\n", kvm_geterr(kd)); 243 exit(1); 244 } 245 if (nflg) 246 printf("%s", 247 "USER CMD PID FD DEV INUM MODE SZ|DV R/W"); 248 else 249 printf("%s", 250 "USER CMD PID FD MOUNT INUM MODE SZ|DV R/W"); 251 if (checkfile && fsflg == 0) 252 printf(" NAME\n"); 253 else 254 putchar('\n'); 255 256 for (plast = &p[cnt]; p < plast; ++p) { 257 if (p->kp_proc.p_stat == SZOMB) 258 continue; 259 dofiles(p); 260 } 261 exit(0); 262 } 263 264 char *Uname, *Comm; 265 int Pid; 266 267 #define PREFIX(i) printf("%-8.8s %-10s %5d", Uname, Comm, Pid); \ 268 switch(i) { \ 269 case TEXT: \ 270 printf(" text"); \ 271 break; \ 272 case CDIR: \ 273 printf(" wd"); \ 274 break; \ 275 case RDIR: \ 276 printf(" root"); \ 277 break; \ 278 case TRACE: \ 279 printf(" tr"); \ 280 break; \ 281 default: \ 282 printf(" %4d", i); \ 283 break; \ 284 } 285 286 /* 287 * print open files attributed to this process 288 */ 289 void 290 dofiles(kp) 291 struct kinfo_proc *kp; 292 { 293 int i, last; 294 struct file file; 295 struct filedesc0 filed0; 296 #define filed filed0.fd_fd 297 struct proc *p = &kp->kp_proc; 298 struct eproc *ep = &kp->kp_eproc; 299 300 extern char *user_from_uid(); 301 302 Uname = user_from_uid(ep->e_ucred.cr_uid, 0); 303 Pid = p->p_pid; 304 Comm = p->p_comm; 305 306 if (p->p_fd == NULL) 307 return; 308 if (!KVM_READ(p->p_fd, &filed0, sizeof (filed0))) { 309 dprintf(stderr, "can't read filedesc at %x for pid %d\n", 310 p->p_fd, Pid); 311 return; 312 } 313 /* 314 * root directory vnode, if one 315 */ 316 if (filed.fd_rdir) 317 vtrans(filed.fd_rdir, RDIR, FREAD); 318 /* 319 * current working directory vnode 320 */ 321 vtrans(filed.fd_cdir, CDIR, FREAD); 322 /* 323 * ktrace vnode, if one 324 */ 325 if (p->p_tracep) 326 vtrans(p->p_tracep, TRACE, FREAD|FWRITE); 327 /* 328 * open files 329 */ 330 #define FPSIZE (sizeof (struct file *)) 331 ALLOC_OFILES(filed.fd_lastfile+1); 332 if (filed.fd_nfiles > NDFILE) { 333 if (!KVM_READ(filed.fd_ofiles, ofiles, 334 (filed.fd_lastfile+1) * FPSIZE)) { 335 dprintf(stderr, 336 "can't read file structures at %x for pid %d\n", 337 filed.fd_ofiles, Pid); 338 return; 339 } 340 } else 341 bcopy(filed0.fd_dfiles, ofiles, (filed.fd_lastfile+1) * FPSIZE); 342 for (i = 0; i <= filed.fd_lastfile; i++) { 343 if (ofiles[i] == NULL) 344 continue; 345 if (!KVM_READ(ofiles[i], &file, sizeof (struct file))) { 346 dprintf(stderr, "can't read file %d at %x for pid %d\n", 347 i, ofiles[i], Pid); 348 continue; 349 } 350 if (file.f_type == DTYPE_VNODE) 351 vtrans((struct vnode *)file.f_data, i, file.f_flag); 352 else if (file.f_type == DTYPE_SOCKET) { 353 if (checkfile == 0) 354 socktrans((struct socket *)file.f_data, i); 355 } 356 else { 357 dprintf(stderr, 358 "unknown file type %d for file %d of pid %d\n", 359 file.f_type, i, Pid); 360 } 361 } 362 } 363 364 void 365 vtrans(vp, i, flag) 366 struct vnode *vp; 367 int i; 368 int flag; 369 { 370 struct vnode vn; 371 struct filestat fst; 372 char rw[3], mode[15]; 373 char *badtype = NULL, *filename, *getmnton(); 374 375 filename = badtype = NULL; 376 if (!KVM_READ(vp, &vn, sizeof (struct vnode))) { 377 dprintf(stderr, "can't read vnode at %x for pid %d\n", 378 vp, Pid); 379 return; 380 } 381 if (vn.v_type == VNON || vn.v_tag == VT_NON) 382 badtype = "none"; 383 else if (vn.v_type == VBAD) 384 badtype = "bad"; 385 else 386 switch (vn.v_tag) { 387 case VT_UFS: 388 if (!ufs_filestat(&vn, &fst)) 389 badtype = "error"; 390 break; 391 case VT_MFS: 392 if (!ufs_filestat(&vn, &fst)) 393 badtype = "error"; 394 break; 395 case VT_NFS: 396 if (!nfs_filestat(&vn, &fst)) 397 badtype = "error"; 398 break; 399 default: { 400 static char unknown[10]; 401 sprintf(badtype = unknown, "?(%x)", vn.v_tag); 402 break;; 403 } 404 } 405 if (checkfile) { 406 int fsmatch = 0; 407 register DEVS *d; 408 409 if (badtype) 410 return; 411 for (d = devs; d != NULL; d = d->next) 412 if (d->fsid == fst.fsid) { 413 fsmatch = 1; 414 if (d->ino == fst.fileid) { 415 filename = d->name; 416 break; 417 } 418 } 419 if (fsmatch == 0 || (filename == NULL && fsflg == 0)) 420 return; 421 } 422 PREFIX(i); 423 if (badtype) { 424 (void)printf(" - - %10s -\n", badtype); 425 return; 426 } 427 if (nflg) 428 (void)printf(" %2d,%-2d", major(fst.fsid), minor(fst.fsid)); 429 else 430 (void)printf(" %-8s", getmnton(vn.v_mount)); 431 if (nflg) 432 (void)sprintf(mode, "%o", fst.mode); 433 else 434 strmode(fst.mode, mode); 435 (void)printf(" %6d %10s", fst.fileid, mode); 436 switch (vn.v_type) { 437 case VBLK: 438 case VCHR: { 439 char *name; 440 441 if (nflg || ((name = devname(fst.rdev, vn.v_type == VCHR ? 442 S_IFCHR : S_IFBLK)) == NULL)) 443 printf(" %2d,%-2d", major(fst.rdev), minor(fst.rdev)); 444 else 445 printf(" %6s", name); 446 break; 447 } 448 default: 449 printf(" %6d", fst.size); 450 } 451 rw[0] = '\0'; 452 if (flag & FREAD) 453 strcat(rw, "r"); 454 if (flag & FWRITE) 455 strcat(rw, "w"); 456 printf(" %2s", rw); 457 if (filename && !fsflg) 458 printf(" %s", filename); 459 putchar('\n'); 460 } 461 462 int 463 ufs_filestat(vp, fsp) 464 struct vnode *vp; 465 struct filestat *fsp; 466 { 467 #ifdef notyet 468 struct inode inode; 469 470 if (!KVM_READ(VTOI(vp), &inode, sizeof (inode))) { 471 dprintf(stderr, "can't read inode at %x for pid %d\n", 472 VTOI(vp), Pid); 473 return 0; 474 } 475 fsp->fsid = inode.i_dev & 0xffff; 476 fsp->fileid = (long)inode.i_number; 477 fsp->mode = (mode_t)inode.i_mode; 478 fsp->size = (u_long)inode.i_size; 479 fsp->rdev = inode.i_rdev; 480 #else 481 struct inode *inode; 482 483 inode = VTOI(vp); 484 fsp->fsid = inode->i_dev & 0xffff; 485 fsp->fileid = (long)inode->i_number; 486 fsp->mode = (mode_t)inode->i_mode; 487 fsp->size = (u_long)inode->i_size; 488 fsp->rdev = inode->i_rdev; 489 #endif 490 491 return 1; 492 } 493 494 int 495 nfs_filestat(vp, fsp) 496 struct vnode *vp; 497 struct filestat *fsp; 498 { 499 #ifdef notyet 500 struct nfsnode nfsnode; 501 register mode_t mode; 502 503 if (!KVM_READ(VTONFS(vp), &nfsnode, sizeof (nfsnode))) { 504 dprintf(stderr, "can't read nfsnode at %x for pid %d\n", 505 VTONFS(vp), Pid); 506 return 0; 507 } 508 fsp->fsid = nfsnode.n_vattr.va_fsid; 509 fsp->fileid = nfsnode.n_vattr.va_fileid; 510 fsp->size = nfsnode.n_size; 511 fsp->rdev = nfsnode.n_vattr.va_rdev; 512 mode = (mode_t)nfsnode.n_vattr.va_mode; 513 switch (vp->v_type) { 514 case VREG: 515 mode |= S_IFREG; 516 break; 517 case VDIR: 518 mode |= S_IFDIR; 519 break; 520 case VBLK: 521 mode |= S_IFBLK; 522 break; 523 case VCHR: 524 mode |= S_IFCHR; 525 break; 526 case VLNK: 527 mode |= S_IFLNK; 528 break; 529 case VSOCK: 530 mode |= S_IFSOCK; 531 break; 532 case VFIFO: 533 mode |= S_IFIFO; 534 break; 535 }; 536 fsp->mode = mode; 537 538 return 1; 539 #else 540 return 0; 541 #endif 542 } 543 544 545 char * 546 getmnton(m) 547 struct mount *m; 548 { 549 static struct mount mount; 550 static struct mtab { 551 struct mtab *next; 552 struct mount *m; 553 char mntonname[MNAMELEN]; 554 } *mhead = NULL; 555 register struct mtab *mt; 556 557 for (mt = mhead; mt != NULL; mt = mt->next) 558 if (m == mt->m) 559 return (mt->mntonname); 560 if (!KVM_READ(m, &mount, sizeof(struct mount))) { 561 fprintf(stderr, "can't read mount table at %x\n", m); 562 return (NULL); 563 } 564 if ((mt = malloc(sizeof (struct mtab))) == NULL) { 565 fprintf(stderr, "fstat: %s\n", strerror(errno)); 566 exit(1); 567 } 568 mt->m = m; 569 bcopy(&mount.mnt_stat.f_mntonname[0], &mt->mntonname[0], MNAMELEN); 570 mt->next = mhead; 571 mhead = mt; 572 return (mt->mntonname); 573 } 574 575 void 576 socktrans(sock, i) 577 struct socket *sock; 578 int i; 579 { 580 static char *stypename[] = { 581 "unused", /* 0 */ 582 "stream", /* 1 */ 583 "dgram", /* 2 */ 584 "raw", /* 3 */ 585 "rdm", /* 4 */ 586 "seqpak" /* 5 */ 587 }; 588 #define STYPEMAX 5 589 struct socket so; 590 struct protosw proto; 591 struct domain dom; 592 struct inpcb inpcb; 593 struct unpcb unpcb; 594 int len; 595 char dname[32], *strcpy(); 596 597 PREFIX(i); 598 599 /* fill in socket */ 600 if (!KVM_READ(sock, &so, sizeof(struct socket))) { 601 dprintf(stderr, "can't read sock at %x\n", sock); 602 goto bad; 603 } 604 605 /* fill in protosw entry */ 606 if (!KVM_READ(so.so_proto, &proto, sizeof(struct protosw))) { 607 dprintf(stderr, "can't read protosw at %x", so.so_proto); 608 goto bad; 609 } 610 611 /* fill in domain */ 612 if (!KVM_READ(proto.pr_domain, &dom, sizeof(struct domain))) { 613 dprintf(stderr, "can't read domain at %x\n", proto.pr_domain); 614 goto bad; 615 } 616 617 if ((len = kvm_read(kd, (u_long)dom.dom_name, dname, 618 sizeof(dname) - 1)) < 0) { 619 dprintf(stderr, "can't read domain name at %x\n", 620 dom.dom_name); 621 dname[0] = '\0'; 622 } 623 else 624 dname[len] = '\0'; 625 626 if ((u_short)so.so_type > STYPEMAX) 627 printf("* %s ?%d", dname, so.so_type); 628 else 629 printf("* %s %s", dname, stypename[so.so_type]); 630 631 /* 632 * protocol specific formatting 633 * 634 * Try to find interesting things to print. For tcp, the interesting 635 * thing is the address of the tcpcb, for udp and others, just the 636 * inpcb (socket pcb). For unix domain, its the address of the socket 637 * pcb and the address of the connected pcb (if connected). Otherwise 638 * just print the protocol number and address of the socket itself. 639 * The idea is not to duplicate netstat, but to make available enough 640 * information for further analysis. 641 */ 642 switch(dom.dom_family) { 643 case AF_INET: 644 getinetproto(proto.pr_protocol); 645 if (proto.pr_protocol == IPPROTO_TCP ) { 646 if (so.so_pcb) { 647 if (kvm_read(kd, (u_long)so.so_pcb, 648 (char *)&inpcb, sizeof(struct inpcb)) 649 != sizeof(struct inpcb)) { 650 dprintf(stderr, 651 "can't read inpcb at %x\n", 652 so.so_pcb); 653 goto bad; 654 } 655 printf(" %x", (int)inpcb.inp_ppcb); 656 } 657 } 658 else if (so.so_pcb) 659 printf(" %x", (int)so.so_pcb); 660 break; 661 case AF_UNIX: 662 /* print address of pcb and connected pcb */ 663 if (so.so_pcb) { 664 printf(" %x", (int)so.so_pcb); 665 if (kvm_read(kd, (u_long)so.so_pcb, (char *)&unpcb, 666 sizeof(struct unpcb)) != sizeof(struct unpcb)){ 667 dprintf(stderr, "can't read unpcb at %x\n", 668 so.so_pcb); 669 goto bad; 670 } 671 if (unpcb.unp_conn) { 672 char shoconn[4], *cp; 673 674 cp = shoconn; 675 if (!(so.so_state & SS_CANTRCVMORE)) 676 *cp++ = '<'; 677 *cp++ = '-'; 678 if (!(so.so_state & SS_CANTSENDMORE)) 679 *cp++ = '>'; 680 *cp = '\0'; 681 printf(" %s %x", shoconn, 682 (int)unpcb.unp_conn); 683 } 684 } 685 break; 686 default: 687 /* print protocol number and socket address */ 688 printf(" %d %x", proto.pr_protocol, (int)sock); 689 } 690 printf("\n"); 691 return; 692 bad: 693 printf("* error\n"); 694 } 695 696 /* 697 * getinetproto -- 698 * print name of protocol number 699 */ 700 void 701 getinetproto(number) 702 int number; 703 { 704 char *cp; 705 706 switch(number) { 707 case IPPROTO_IP: 708 cp = "ip"; break; 709 case IPPROTO_ICMP: 710 cp ="icmp"; break; 711 case IPPROTO_GGP: 712 cp ="ggp"; break; 713 case IPPROTO_TCP: 714 cp ="tcp"; break; 715 case IPPROTO_EGP: 716 cp ="egp"; break; 717 case IPPROTO_PUP: 718 cp ="pup"; break; 719 case IPPROTO_UDP: 720 cp ="udp"; break; 721 case IPPROTO_IDP: 722 cp ="idp"; break; 723 case IPPROTO_RAW: 724 cp ="raw"; break; 725 default: 726 printf(" %d", number); 727 return; 728 } 729 printf(" %s", cp); 730 } 731 732 getfname(filename) 733 char *filename; 734 { 735 struct stat statbuf; 736 DEVS *cur; 737 738 if (stat(filename, &statbuf)) { 739 fprintf(stderr, "fstat: %s: %s\n", filename, strerror(errno)); 740 return(0); 741 } 742 if ((cur = malloc(sizeof(DEVS))) == NULL) { 743 fprintf(stderr, "fstat: %s\n", strerror(errno)); 744 exit(1); 745 } 746 cur->next = devs; 747 devs = cur; 748 749 cur->ino = statbuf.st_ino; 750 cur->fsid = statbuf.st_dev & 0xffff; 751 cur->name = filename; 752 return(1); 753 } 754 755 void 756 usage() 757 { 758 (void)fprintf(stderr, 759 "usage: fstat [-fnv] [-p pid] [-u user] [-N system] [-M core] [file ...]\n"); 760 exit(1); 761 } 762
Indexes created Sat Sep 20 22:09:52 GMT 2025