ultrix_misc.c revision 1.33
1 /* $NetBSD: ultrix_misc.c,v 1.33 1997/05/24 10:26:32 jonathan Exp $ */ 2 3 /* 4 * Copyright (c) 1995, 1997 Jonathan Stone (hereinafter referred to as the author) 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Matthew R. Green for 18 * the NetBSD Project. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * Copyright (c) 1992, 1993 37 * The Regents of the University of California. All rights reserved. 38 * 39 * This software was developed by the Computer Systems Engineering group 40 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 41 * contributed to Berkeley. 42 * 43 * All advertising materials mentioning features or use of this software 44 * must display the following acknowledgement: 45 * This product includes software developed by the University of 46 * California, Lawrence Berkeley Laboratory. 47 * 48 * Redistribution and use in source and binary forms, with or without 49 * modification, are permitted provided that the following conditions 50 * are met: 51 * 1. Redistributions of source code must retain the above copyright 52 * notice, this list of conditions and the following disclaimer. 53 * 2. Redistributions in binary form must reproduce the above copyright 54 * notice, this list of conditions and the following disclaimer in the 55 * documentation and/or other materials provided with the distribution. 56 * 3. All advertising materials mentioning features or use of this software 57 * must display the following acknowledgement: 58 * This product includes software developed by the University of 59 * California, Berkeley and its contributors. 60 * 4. Neither the name of the University nor the names of its contributors 61 * may be used to endorse or promote products derived from this software 62 * without specific prior written permission. 63 * 64 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 65 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 66 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 67 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 68 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 69 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 70 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 71 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 72 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 73 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 74 * SUCH DAMAGE. 75 * 76 * 77 * @(#)sun_misc.c 8.1 (Berkeley) 6/18/93 78 * 79 * from: Header: sun_misc.c,v 1.16 93/04/07 02:46:27 torek Exp 80 */ 81 82 /* 83 * SunOS compatibility module. 84 * 85 * SunOS system calls that are implemented differently in BSD are 86 * handled here. 87 */ 88 89 #include <sys/param.h> 90 #include <sys/systm.h> 91 #include <sys/namei.h> 92 #include <sys/dirent.h> 93 #include <sys/proc.h> 94 #include <sys/file.h> 95 #include <sys/filedesc.h> 96 /*#include <sys/stat.h>*/ 97 /*#include <sys/ioctl.h>*/ 98 #include <sys/kernel.h> 99 #include <sys/exec.h> 100 #include <sys/malloc.h> 101 #include <sys/mbuf.h> 102 #include <sys/mman.h> 103 #include <sys/mount.h> 104 #include <sys/resource.h> 105 #include <sys/resourcevar.h> 106 #include <sys/signal.h> 107 #include <sys/signalvar.h> 108 #include <sys/socket.h> 109 #include <sys/vnode.h> 110 #include <sys/uio.h> 111 #include <sys/wait.h> 112 #include <sys/utsname.h> 113 #include <sys/unistd.h> 114 #include <sys/ipc.h> 115 116 #include <sys/syscallargs.h> 117 118 #include <compat/ultrix/ultrix_syscall.h> 119 #include <compat/ultrix/ultrix_syscallargs.h> 120 #include <compat/common/compat_util.h> 121 122 #include <netinet/in.h> 123 124 #include <miscfs/specfs/specdev.h> 125 126 #include <nfs/rpcv2.h> 127 #include <nfs/nfsproto.h> 128 #include <nfs/nfs.h> 129 130 #include <vm/vm.h> 131 132 #include <sys/conf.h> /* iszerodev() */ 133 #include <sys/socketvar.h> /* sosetopt() */ 134 135 extern struct sysent ultrix_sysent[]; 136 extern char *ultrix_syscallnames[]; 137 138 /* 139 * Select the appropriate setregs callback for the target architecture. 140 */ 141 #ifdef mips 142 #include <machine/ecoff_machdep.h> 143 #define ULTRIX_EXEC_SETREGS cpu_exec_ecoff_setregs 144 #endif /* mips */ 145 146 #ifdef vax 147 #define ULTRIX_EXEC_SETREGS setregs 148 #endif /* mips */ 149 150 151 extern void ULTRIX_EXEC_SETREGS __P((struct proc *, struct exec_package *, 152 u_long, register_t *)); 153 extern char sigcode[], esigcode[]; 154 155 struct emul emul_ultrix = { 156 "ultrix", 157 NULL, 158 sendsig, 159 ULTRIX_SYS_syscall, 160 ULTRIX_SYS_MAXSYSCALL, 161 ultrix_sysent, 162 ultrix_syscallnames, 163 0, 164 copyargs, 165 ULTRIX_EXEC_SETREGS, 166 sigcode, 167 esigcode, 168 }; 169 170 #define GSI_PROG_ENV 1 171 172 int 173 ultrix_sys_getsysinfo(p, v, retval) 174 struct proc *p; 175 void *v; 176 register_t *retval; 177 { 178 struct ultrix_sys_getsysinfo_args *uap = v; 179 static short progenv = 0; 180 181 switch (SCARG(uap, op)) { 182 /* operations implemented: */ 183 case GSI_PROG_ENV: 184 if (SCARG(uap, nbytes) < sizeof(short)) 185 return EINVAL; 186 *retval = 1; 187 return (copyout(&progenv, SCARG(uap, buffer), sizeof(short))); 188 default: 189 *retval = 0; /* info unavail */ 190 return 0; 191 } 192 } 193 194 int 195 ultrix_sys_setsysinfo(p, v, retval) 196 struct proc *p; 197 void *v; 198 register_t *retval; 199 { 200 201 #ifdef notyet 202 struct ultrix_sys_setsysinfo_args *uap = v; 203 #endif 204 205 *retval = 0; 206 return 0; 207 } 208 209 int 210 ultrix_sys_waitpid(p, v, retval) 211 struct proc *p; 212 void *v; 213 register_t *retval; 214 { 215 struct ultrix_sys_waitpid_args *uap = v; 216 struct sys_wait4_args ua; 217 218 SCARG(&ua, pid) = SCARG(uap, pid); 219 SCARG(&ua, status) = SCARG(uap, status); 220 SCARG(&ua, options) = SCARG(uap, options); 221 SCARG(&ua, rusage) = 0; 222 223 return (sys_wait4(p, &ua, retval)); 224 } 225 226 int 227 ultrix_sys_wait3(p, v, retval) 228 struct proc *p; 229 void *v; 230 register_t *retval; 231 { 232 struct ultrix_sys_wait3_args *uap = v; 233 struct sys_wait4_args ua; 234 235 SCARG(&ua, pid) = -1; 236 SCARG(&ua, status) = SCARG(uap, status); 237 SCARG(&ua, options) = SCARG(uap, options); 238 SCARG(&ua, rusage) = SCARG(uap, rusage); 239 240 return (sys_wait4(p, &ua, retval)); 241 } 242 243 /* 244 * Ultrix binaries pass in FD_MAX as the first arg to select(). 245 * On Ultrix, FD_MAX is 4096, which is more than the NetBSD sys_select() 246 * can handle. 247 * Since we can't have more than the (native) FD_MAX descriptors open, 248 * limit nfds to at most FD_MAX. 249 */ 250 int 251 ultrix_sys_select(p, v, retval) 252 struct proc *p; 253 void *v; 254 register_t *retval; 255 { 256 struct sys_select_args *uap = v; 257 struct timeval atv; 258 int error; 259 260 /* Limit number of FDs selected on to the native maximum */ 261 262 if (SCARG(uap, nd) > FD_SETSIZE) 263 SCARG(uap, nd) = FD_SETSIZE; 264 265 /* Check for negative timeval */ 266 if (SCARG(uap, tv)) { 267 error = copyin((caddr_t)SCARG(uap, tv), (caddr_t)&atv, 268 sizeof(atv)); 269 if (error) 270 goto done; 271 #ifdef DEBUG 272 /* Ultrix clients sometimes give negative timeouts? */ 273 if (atv.tv_sec < 0 || atv.tv_usec < 0) 274 printf("ultrix select( %ld, %ld): negative timeout\n", 275 atv.tv_sec, atv.tv_usec); 276 /*tvp = (timeval *)STACKGAPBASE;*/ 277 #endif 278 279 } 280 error = sys_select(p, (void*) uap, retval); 281 if (error == EINVAL) 282 printf("ultrix select: bad args?\n"); 283 284 done: 285 return error; 286 } 287 288 #if defined(NFS) 289 int 290 async_daemon(p, v, retval) 291 struct proc *p; 292 void *v; 293 register_t *retval; 294 { 295 struct sys_nfssvc_args ouap; 296 297 SCARG(&ouap, flag) = NFSSVC_BIOD; 298 SCARG(&ouap, argp) = NULL; 299 300 return (sys_nfssvc(p, &ouap, retval)); 301 } 302 #endif /* NFS */ 303 304 305 #define SUN__MAP_NEW 0x80000000 /* if not, old mmap & cannot handle */ 306 307 int 308 ultrix_sys_mmap(p, v, retval) 309 register struct proc *p; 310 void *v; 311 register_t *retval; 312 { 313 register struct ultrix_sys_mmap_args *uap = v; 314 struct sys_mmap_args ouap; 315 register struct filedesc *fdp; 316 register struct file *fp; 317 register struct vnode *vp; 318 319 /* 320 * Verify the arguments. 321 */ 322 if (SCARG(uap, prot) & ~(PROT_READ|PROT_WRITE|PROT_EXEC)) 323 return (EINVAL); /* XXX still needed? */ 324 325 if ((SCARG(uap, flags) & SUN__MAP_NEW) == 0) 326 return (EINVAL); 327 328 SCARG(&ouap, flags) = SCARG(uap, flags) & ~SUN__MAP_NEW; 329 SCARG(&ouap, addr) = SCARG(uap, addr); 330 331 if ((SCARG(&ouap, flags) & MAP_FIXED) == 0 && 332 SCARG(&ouap, addr) != 0 && 333 SCARG(&ouap, addr) < (caddr_t)round_page(p->p_vmspace->vm_daddr+MAXDSIZ)) 334 SCARG(&ouap, addr) = (caddr_t)round_page(p->p_vmspace->vm_daddr+MAXDSIZ); 335 336 SCARG(&ouap, len) = SCARG(uap, len); 337 SCARG(&ouap, prot) = SCARG(uap, prot); 338 SCARG(&ouap, fd) = SCARG(uap, fd); 339 SCARG(&ouap, pos) = SCARG(uap, pos); 340 341 /* 342 * Special case: if fd refers to /dev/zero, map as MAP_ANON. (XXX) 343 */ 344 fdp = p->p_fd; 345 if ((unsigned)SCARG(&ouap, fd) < fdp->fd_nfiles && /*XXX*/ 346 (fp = fdp->fd_ofiles[SCARG(&ouap, fd)]) != NULL && /*XXX*/ 347 fp->f_type == DTYPE_VNODE && /*XXX*/ 348 (vp = (struct vnode *)fp->f_data)->v_type == VCHR && /*XXX*/ 349 iszerodev(vp->v_rdev)) { /*XXX*/ 350 SCARG(&ouap, flags) |= MAP_ANON; 351 SCARG(&ouap, fd) = -1; 352 } 353 354 return (sys_mmap(p, &ouap, retval)); 355 } 356 357 int 358 ultrix_sys_setsockopt(p, v, retval) 359 struct proc *p; 360 void *v; 361 register_t *retval; 362 { 363 register struct ultrix_sys_setsockopt_args *uap = v; 364 struct file *fp; 365 struct mbuf *m = NULL; 366 int error; 367 368 if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) 369 return (error); 370 #define SO_DONTLINGER (~SO_LINGER) 371 if (SCARG(uap, name) == SO_DONTLINGER) { 372 m = m_get(M_WAIT, MT_SOOPTS); 373 mtod(m, struct linger *)->l_onoff = 0; 374 m->m_len = sizeof(struct linger); 375 return (sosetopt((struct socket *)fp->f_data, SCARG(uap, level), 376 SO_LINGER, m)); 377 } 378 if (SCARG(uap, level) == IPPROTO_IP) { 379 #define EMUL_IP_MULTICAST_IF 2 380 #define EMUL_IP_MULTICAST_TTL 3 381 #define EMUL_IP_MULTICAST_LOOP 4 382 #define EMUL_IP_ADD_MEMBERSHIP 5 383 #define EMUL_IP_DROP_MEMBERSHIP 6 384 static int ipoptxlat[] = { 385 IP_MULTICAST_IF, 386 IP_MULTICAST_TTL, 387 IP_MULTICAST_LOOP, 388 IP_ADD_MEMBERSHIP, 389 IP_DROP_MEMBERSHIP 390 }; 391 if (SCARG(uap, name) >= EMUL_IP_MULTICAST_IF && 392 SCARG(uap, name) <= EMUL_IP_DROP_MEMBERSHIP) { 393 SCARG(uap, name) = 394 ipoptxlat[SCARG(uap, name) - EMUL_IP_MULTICAST_IF]; 395 } 396 } 397 if (SCARG(uap, valsize) > MLEN) 398 return (EINVAL); 399 if (SCARG(uap, val)) { 400 m = m_get(M_WAIT, MT_SOOPTS); 401 error = copyin(SCARG(uap, val), mtod(m, caddr_t), 402 (u_int)SCARG(uap, valsize)); 403 if (error) { 404 (void) m_free(m); 405 return (error); 406 } 407 m->m_len = SCARG(uap, valsize); 408 } 409 return (sosetopt((struct socket *)fp->f_data, SCARG(uap, level), 410 SCARG(uap, name), m)); 411 } 412 413 struct ultrix_utsname { 414 char sysname[9]; 415 char nodename[9]; 416 char nodeext[65-9]; 417 char release[9]; 418 char version[9]; 419 char machine[9]; 420 }; 421 422 int 423 ultrix_sys_uname(p, v, retval) 424 struct proc *p; 425 void *v; 426 register_t *retval; 427 { 428 struct ultrix_sys_uname_args *uap = v; 429 struct ultrix_utsname sut; 430 extern char ostype[], machine[], osrelease[]; 431 432 bzero(&sut, sizeof(sut)); 433 434 bcopy(ostype, sut.sysname, sizeof(sut.sysname) - 1); 435 bcopy(hostname, sut.nodename, sizeof(sut.nodename)); 436 sut.nodename[sizeof(sut.nodename)-1] = '\0'; 437 bcopy(osrelease, sut.release, sizeof(sut.release) - 1); 438 bcopy("1", sut.version, sizeof(sut.version) - 1); 439 bcopy(machine, sut.machine, sizeof(sut.machine) - 1); 440 441 return copyout((caddr_t)&sut, (caddr_t)SCARG(uap, name), 442 sizeof(struct ultrix_utsname)); 443 } 444 445 int 446 ultrix_sys_setpgrp(p, v, retval) 447 struct proc *p; 448 void *v; 449 register_t *retval; 450 { 451 struct ultrix_sys_setpgrp_args *uap = v; 452 453 /* 454 * difference to our setpgid call is to include backwards 455 * compatibility to pre-setsid() binaries. Do setsid() 456 * instead of setpgid() in those cases where the process 457 * tries to create a new session the old way. 458 */ 459 if (!SCARG(uap, pgid) && 460 (!SCARG(uap, pid) || SCARG(uap, pid) == p->p_pid)) 461 return sys_setsid(p, uap, retval); 462 else 463 return sys_setpgid(p, uap, retval); 464 } 465 466 #if defined (NFSSERVER) 467 int 468 ultrix_sys_nfssvc(p, v, retval) 469 struct proc *p; 470 void *v; 471 register_t *retval; 472 { 473 474 #if 0 /* XXX */ 475 struct ultrix_sys_nfssvc_args *uap = v; 476 struct emul *e = p->p_emul; 477 struct sys_nfssvc_args outuap; 478 struct sockaddr sa; 479 int error; 480 481 bzero(&outuap, sizeof outuap); 482 SCARG(&outuap, fd) = SCARG(uap, fd); 483 SCARG(&outuap, mskval) = STACKGAPBASE; 484 SCARG(&outuap, msklen) = sizeof sa; 485 SCARG(&outuap, mtchval) = outuap.mskval + sizeof sa; 486 SCARG(&outuap, mtchlen) = sizeof sa; 487 488 bzero(&sa, sizeof sa); 489 if (error = copyout(&sa, SCARG(&outuap, mskval), SCARG(&outuap, msklen))) 490 return (error); 491 if (error = copyout(&sa, SCARG(&outuap, mtchval), SCARG(&outuap, mtchlen))) 492 return (error); 493 494 return nfssvc(p, &outuap, retval); 495 #else 496 return (ENOSYS); 497 #endif 498 } 499 #endif /* NFSSERVER */ 500 501 struct ultrix_ustat { 502 daddr_t f_tfree; /* total free */ 503 ino_t f_tinode; /* total inodes free */ 504 char f_fname[6]; /* filsys name */ 505 char f_fpack[6]; /* filsys pack name */ 506 }; 507 508 int 509 ultrix_sys_ustat(p, v, retval) 510 struct proc *p; 511 void *v; 512 register_t *retval; 513 { 514 struct ultrix_sys_ustat_args *uap = v; 515 struct ultrix_ustat us; 516 int error; 517 518 bzero(&us, sizeof us); 519 520 /* 521 * XXX: should set f_tfree and f_tinode at least 522 * How do we translate dev -> fstat? (and then to ultrix_ustat) 523 */ 524 525 if ((error = copyout(&us, SCARG(uap, buf), sizeof us)) != 0) 526 return (error); 527 return 0; 528 } 529 530 int 531 ultrix_sys_quotactl(p, v, retval) 532 struct proc *p; 533 void *v; 534 register_t *retval; 535 { 536 537 #ifdef notyet 538 struct ultrix_sys_quotactl_args *uap = v; 539 #endif 540 541 return EINVAL; 542 } 543 544 int 545 ultrix_sys_vhangup(p, v, retval) 546 struct proc *p; 547 void *v; 548 register_t *retval; 549 { 550 551 return 0; 552 } 553 554 int 555 ultrix_sys_exportfs(p, v, retval) 556 struct proc *p; 557 void *v; 558 register_t *retval; 559 { 560 #ifdef notyet 561 struct ultrix_sys_exportfs_args *uap = v; 562 #endif 563 564 /* 565 * XXX: should perhaps translate into a mount(2) 566 * with MOUNT_EXPORT? 567 */ 568 return 0; 569 } 570 571 int 572 ultrix_sys_sigpending(p, v, retval) 573 struct proc *p; 574 void *v; 575 register_t *retval; 576 { 577 struct ultrix_sys_sigpending_args *uap = v; 578 int mask = p->p_siglist & p->p_sigmask; 579 580 return (copyout((caddr_t)&mask, (caddr_t)SCARG(uap, mask), sizeof(int))); 581 } 582 583 int 584 ultrix_sys_sigcleanup(p, v, retval) 585 struct proc *p; 586 void *v; 587 register_t *retval; 588 { 589 struct ultrix_sys_sigcleanup_args *uap = v; 590 591 return sys_sigreturn(p, (struct sys_sigreturn_args *)uap, retval); 592 } 593 594 int 595 ultrix_sys_sigreturn(p, v, retval) 596 struct proc *p; 597 void *v; 598 register_t *retval; 599 { 600 struct ultrix_sys_sigcleanup_args *uap = v; 601 602 #ifdef DEBUG 603 printf("ultrix sigreturn\n"); 604 #endif 605 return sys_sigreturn(p, (struct sys_sigreturn_args *)uap, retval); 606 } 607 608 int 609 ultrix_sys_shmsys(p, v, retval) 610 struct proc *p; 611 void *v; 612 register_t *retval; 613 { 614 615 #ifdef SYSVSHM 616 617 /* Ultrix SVSHM weirndess: */ 618 struct ultrix_sys_shmsys_args *uap = v; 619 struct sys_shmat_args shmat_args; 620 struct sys_shmctl_args shmctl_args; 621 struct sys_shmdt_args shmdt_args; 622 struct sys_shmget_args shmget_args; 623 624 625 switch (SCARG(uap, shmop)) { 626 case 0: /* Ultrix shmat() */ 627 SCARG(&shmat_args, shmid) = SCARG(uap, a2); 628 SCARG(&shmat_args, shmaddr) = (void *)SCARG(uap, a3); 629 SCARG(&shmat_args, shmflg) = SCARG(uap, a4); 630 return (sys_shmat(p, &shmat_args, retval)); 631 632 case 1: /* Ultrix shmctl() */ 633 SCARG(&shmctl_args, shmid) = SCARG(uap, a2); 634 SCARG(&shmctl_args, cmd) = SCARG(uap, a3); 635 SCARG(&shmctl_args, buf) = (struct shmid_ds *)SCARG(uap, a4); 636 return (sys_shmctl(p, &shmctl_args, retval)); 637 638 case 2: /* Ultrix shmdt() */ 639 SCARG(&shmat_args, shmaddr) = (void *)SCARG(uap, a2); 640 return (sys_shmdt(p, &shmdt_args, retval)); 641 642 case 3: /* Ultrix shmget() */ 643 SCARG(&shmget_args, key) = SCARG(uap, a2); 644 SCARG(&shmget_args, size) = SCARG(uap, a3); 645 SCARG(&shmget_args, shmflg) = SCARG(uap, a4) 646 & (IPC_CREAT|IPC_EXCL|IPC_NOWAIT); 647 return (sys_shmget(p, &shmget_args, retval)); 648 649 default: 650 return (EINVAL); 651 } 652 #else 653 return (EOPNOTSUPP); 654 #endif /* SYSVSHM */ 655 } 656
Indexes created Tue Sep 23 22:09:46 GMT 2025