| 1 | /* |
| 2 | * Copyright (c) 1984 through 2008, William LeFebvre |
| 3 | * 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 are met: |
| 7 | * |
| 8 | * * Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * |
| 11 | * * Redistributions in binary form must reproduce the above |
| 12 | * copyright notice, this list of conditions and the following disclaimer |
| 13 | * in the documentation and/or other materials provided with the |
| 14 | * distribution. |
| 15 | * |
| 16 | * * Neither the name of William LeFebvre nor the names of other |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 24 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 25 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 26 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 30 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | char *copyright = |
| 34 | "Copyright (c) 1984 through 2008, William LeFebvre"; |
| 35 | |
| 36 | /* |
| 37 | * Changes to other files that we can do at the same time: |
| 38 | * screen.c:init_termcap: get rid of the "interactive" argument and have it |
| 39 | * pass back something meaningful (such as success/failure/error). |
| 40 | */ |
| 41 | |
| 42 | #include "os.h" |
| 43 | #include <signal.h> |
| 44 | #include <setjmp.h> |
| 45 | #include <ctype.h> |
| 46 | #include <sys/types.h> |
| 47 | #include <sys/uio.h> |
| 48 | #include <unistd.h> |
| 49 | |
| 50 | #ifdef HAVE_SYS_UTSNAME_H |
| 51 | #include <sys/utsname.h> |
| 52 | #endif |
| 53 | |
| 54 | #ifdef HAVE_GETOPT_H |
| 55 | #include <getopt.h> |
| 56 | #endif |
| 57 | |
| 58 | /* definitions */ |
| 59 | #ifndef STDIN_FILENO |
| 60 | #define STDIN_FILENO 0 |
| 61 | #endif |
| 62 | |
| 63 | /* determine which type of signal functions to use */ |
| 64 | /* cant have sigaction without sigprocmask */ |
| 65 | #if defined(HAVE_SIGACTION) && !defined(HAVE_SIGPROCMASK) |
| 66 | #undef HAVE_SIGACTION |
| 67 | #endif |
| 68 | /* always use sigaction when it is available */ |
| 69 | #ifdef HAVE_SIGACTION |
| 70 | #undef HAVE_SIGHOLD |
| 71 | #else |
| 72 | /* use sighold/sigrelse, otherwise use old fashioned BSD signals */ |
| 73 | #if !defined(HAVE_SIGHOLD) || !defined(HAVE_SIGRELSE) |
| 74 | #define BSD_SIGNALS |
| 75 | #endif |
| 76 | #endif |
| 77 | |
| 78 | /* if FD_SET and friends aren't present, then fake something up */ |
| 79 | #ifndef FD_SET |
| 80 | typedef int fd_set; |
| 81 | #define FD_ZERO(x) (*(x) = 0) |
| 82 | #define FD_SET(f, x) (*(x) = 1<<f) |
| 83 | #endif |
| 84 | |
| 85 | /* includes specific to top */ |
| 86 | |
| 87 | #include "top.h" |
| 88 | #include "machine.h" |
| 89 | #include "globalstate.h" |
| 90 | #include "commands.h" |
| 91 | #include "display.h" |
| 92 | #include "screen.h" |
| 93 | #include "boolean.h" |
| 94 | #include "username.h" |
| 95 | #include "utils.h" |
| 96 | #include "version.h" |
| 97 | #ifdef ENABLE_COLOR |
| 98 | #include "color.h" |
| 99 | #endif |
| 100 | |
| 101 | /* definitions */ |
| 102 | #define BUFFERSIZE 4096 |
| 103 | #define JMP_RESUME 1 |
| 104 | #define JMP_RESIZE 2 |
| 105 | |
| 106 | /* externs for getopt: */ |
| 107 | extern int optind; |
| 108 | extern char *optarg; |
| 109 | |
| 110 | /* statics */ |
| 111 | static char stdoutbuf[BUFFERSIZE]; |
| 112 | static jmp_buf jmp_int; |
| 113 | |
| 114 | /* globals */ |
| 115 | char *myname = "top"; |
| 116 | |
| 117 | void |
| 118 | quit(int status) |
| 119 | |
| 120 | { |
| 121 | screen_end(); |
| 122 | chdir("/tmp"); |
| 123 | exit(status); |
| 124 | /* NOTREACHED */ |
| 125 | } |
| 126 | |
| 127 | /* |
| 128 | * signal handlers |
| 129 | */ |
| 130 | |
| 131 | void |
| 132 | set_signal(int sig, RETSIGTYPE (*handler)(int)) |
| 133 | |
| 134 | { |
| 135 | #ifdef HAVE_SIGACTION |
| 136 | struct sigaction action; |
| 137 | |
| 138 | action.sa_handler = handler; |
| 139 | action.sa_flags = 0; |
| 140 | (void) sigaction(sig, &action, NULL); |
| 141 | #else |
| 142 | (void) signal(sig, handler); |
| 143 | #endif |
| 144 | } |
| 145 | |
| 146 | void |
| 147 | release_signal(int sig) |
| 148 | |
| 149 | { |
| 150 | #ifdef HAVE_SIGACTION |
| 151 | sigset_t set; |
| 152 | sigemptyset(&set); |
| 153 | sigaddset(&set, sig); |
| 154 | sigprocmask(SIG_UNBLOCK, &set, NULL); |
| 155 | #endif |
| 156 | |
| 157 | #ifdef HAVE_SIGHOLD |
| 158 | sigrelse(sig); |
| 159 | #endif |
| 160 | |
| 161 | #ifdef BSD_SIGNALS |
| 162 | (void) sigsetmask(sigblock(0) & ~(sigmask(sig))); |
| 163 | #endif |
| 164 | } |
| 165 | |
| 166 | RETSIGTYPE |
| 167 | sig_leave(int i) /* exit under normal conditions -- INT handler */ |
| 168 | |
| 169 | { |
| 170 | screen_end(); |
| 171 | exit(EX_OK); |
| 172 | } |
| 173 | |
| 174 | RETSIGTYPE |
| 175 | sig_tstop(int i) /* SIGTSTP handler */ |
| 176 | |
| 177 | { |
| 178 | /* move to the lower left */ |
| 179 | screen_end(); |
| 180 | fflush(stdout); |
| 181 | |
| 182 | /* default the signal handler action */ |
| 183 | set_signal(SIGTSTP, SIG_DFL); |
| 184 | |
| 185 | /* unblock the TSTP signal */ |
| 186 | release_signal(SIGTSTP); |
| 187 | |
| 188 | /* send ourselves a TSTP to stop the process */ |
| 189 | (void) kill(0, SIGTSTP); |
| 190 | |
| 191 | /* reset the signal handler */ |
| 192 | set_signal(SIGTSTP, sig_tstop); |
| 193 | |
| 194 | /* reinit screen */ |
| 195 | screen_reinit(); |
| 196 | |
| 197 | /* jump back to a known place in the main loop */ |
| 198 | longjmp(jmp_int, JMP_RESUME); |
| 199 | |
| 200 | /* NOTREACHED */ |
| 201 | } |
| 202 | |
| 203 | #ifdef SIGWINCH |
| 204 | RETSIGTYPE |
| 205 | sig_winch(int i) /* SIGWINCH handler */ |
| 206 | |
| 207 | { |
| 208 | /* reascertain the screen dimensions */ |
| 209 | screen_getsize(); |
| 210 | |
| 211 | /* jump back to a known place in the main loop */ |
| 212 | longjmp(jmp_int, JMP_RESIZE); |
| 213 | } |
| 214 | #endif |
| 215 | |
| 216 | #ifdef HAVE_SIGACTION |
| 217 | static sigset_t signalset; |
| 218 | #endif |
| 219 | |
| 220 | void * |
| 221 | hold_signals() |
| 222 | |
| 223 | { |
| 224 | #ifdef HAVE_SIGACTION |
| 225 | sigemptyset(&signalset); |
| 226 | sigaddset(&signalset, SIGINT); |
| 227 | sigaddset(&signalset, SIGQUIT); |
| 228 | sigaddset(&signalset, SIGTSTP); |
| 229 | #ifdef SIGWINCH |
| 230 | sigaddset(&signalset, SIGWINCH); |
| 231 | #endif |
| 232 | sigprocmask(SIG_BLOCK, &signalset, NULL); |
| 233 | return (void *)(&signalset); |
| 234 | #endif |
| 235 | |
| 236 | #ifdef HAVE_SIGHOLD |
| 237 | sighold(SIGINT); |
| 238 | sighold(SIGQUIT); |
| 239 | sighold(SIGTSTP); |
| 240 | #ifdef SIGWINCH |
| 241 | sighold(SIGWINCH); |
| 242 | return NULL; |
| 243 | #endif |
| 244 | #endif |
| 245 | |
| 246 | #ifdef BSD_SIGNALS |
| 247 | int mask; |
| 248 | #ifdef SIGWINCH |
| 249 | mask = sigblock(sigmask(SIGINT) | sigmask(SIGQUIT) | |
| 250 | sigmask(SIGTSTP) | sigmask(SIGWINCH)); |
| 251 | #else |
| 252 | mask = sigblock(sigmask(SIGINT) | sigmask(SIGQUIT) | sigmask(SIGTSTP)); |
| 253 | return (void *)mask; |
| 254 | #endif |
| 255 | #endif |
| 256 | |
| 257 | } |
| 258 | |
| 259 | void |
| 260 | set_signals() |
| 261 | |
| 262 | { |
| 263 | (void) set_signal(SIGINT, sig_leave); |
| 264 | (void) set_signal(SIGQUIT, sig_leave); |
| 265 | (void) set_signal(SIGTSTP, sig_tstop); |
| 266 | #ifdef SIGWINCH |
| 267 | (void) set_signal(SIGWINCH, sig_winch); |
| 268 | #endif |
| 269 | } |
| 270 | |
| 271 | void |
| 272 | release_signals(void *parm) |
| 273 | |
| 274 | { |
| 275 | #ifdef HAVE_SIGACTION |
| 276 | sigprocmask(SIG_UNBLOCK, (sigset_t *)parm, NULL); |
| 277 | #endif |
| 278 | |
| 279 | #ifdef HAVE_SIGHOLD |
| 280 | sigrelse(SIGINT); |
| 281 | sigrelse(SIGQUIT); |
| 282 | sigrelse(SIGTSTP); |
| 283 | #ifdef SIGWINCH |
| 284 | sigrelse(SIGWINCH); |
| 285 | #endif |
| 286 | #endif |
| 287 | |
| 288 | #ifdef BSD_SIGNALS |
| 289 | (void) sigsetmask((int)parm); |
| 290 | #endif |
| 291 | } |
| 292 | |
| 293 | /* |
| 294 | * void do_arguments(globalstate *gstate, int ac, char **av) |
| 295 | * |
| 296 | * Arguments processing. gstate points to the global state, |
| 297 | * ac and av are the arguments to process. This can be called |
| 298 | * multiple times with different sets of arguments. |
| 299 | */ |
| 300 | |
| 301 | #ifdef HAVE_GETOPT_LONG |
| 302 | static struct option longopts[] = { |
| 303 | { "color", no_argument, NULL, 'C' }, |
| 304 | { "debug", no_argument, NULL, 'D' }, |
| 305 | { "system-procs", no_argument, NULL, 'S' }, |
| 306 | { "idle-procs", no_argument, NULL, 'I' }, |
| 307 | { "tag-names", no_argument, NULL, 'T' }, |
| 308 | { "all", no_argument, NULL, 'a' }, |
| 309 | { "batch", no_argument, NULL, 'b' }, |
| 310 | { "full-commands", no_argument, NULL, 'c' }, |
| 311 | { "interactive", no_argument, NULL, 'i' }, |
| 312 | { "quick", no_argument, NULL, 'q' }, |
| 313 | { "threads", no_argument, NULL, 't' }, |
| 314 | { "uids", no_argument, NULL, 'u' }, |
| 315 | { "version", no_argument, NULL, 'v' }, |
| 316 | { "delay", required_argument, NULL, 's' }, |
| 317 | { "displays", required_argument, NULL, 'd' }, |
| 318 | { "user", required_argument, NULL, 'U' }, |
| 319 | { "sort-order", required_argument, NULL, 'o' }, |
| 320 | { "display-mode", required_argument, NULL, 'm' }, |
| 321 | { NULL, 0, NULL, 0 }, |
| 322 | }; |
| 323 | #endif |
| 324 | |
| 325 | |
| 326 | void |
| 327 | do_arguments(globalstate *gstate, int ac, char **av) |
| 328 | |
| 329 | { |
| 330 | int i; |
| 331 | |
| 332 | /* this appears to keep getopt happy */ |
| 333 | optind = 1; |
| 334 | |
| 335 | #ifdef HAVE_GETOPT_LONG |
| 336 | while ((i = getopt_long(ac, av, "CDSIMTabcinqtuvs:d:U:o:m:", longopts, NULL)) != -1) |
| 337 | #else |
| 338 | while ((i = getopt(ac, av, "CDSIMTabcinqtuvs:d:U:o:m:")) != EOF) |
| 339 | #endif |
| 340 | { |
| 341 | switch(i) |
| 342 | { |
| 343 | #ifdef ENABLE_COLOR |
| 344 | case 'C': |
| 345 | gstate->use_color = !gstate->use_color; |
| 346 | break; |
| 347 | #endif |
| 348 | |
| 349 | case 'D': |
| 350 | debug_set(1); |
| 351 | break; |
| 352 | |
| 353 | case 'v': |
| 354 | fprintf(stderr, "%s: version %s\n", myname, version_string()); |
| 355 | exit(EX_OK); |
| 356 | break; |
| 357 | |
| 358 | case 'b': |
| 359 | case 'n': |
| 360 | gstate->interactive = No; |
| 361 | break; |
| 362 | |
| 363 | case 'a': |
| 364 | gstate->displays = Infinity; |
| 365 | gstate->topn = Infinity; |
| 366 | break; |
| 367 | |
| 368 | case 'i': |
| 369 | gstate->interactive = Yes; |
| 370 | break; |
| 371 | |
| 372 | case 'o': |
| 373 | gstate->order_name = optarg; |
| 374 | break; |
| 375 | |
| 376 | case 'd': |
| 377 | i = atoiwi(optarg); |
| 378 | if (i == Invalid || i == 0) |
| 379 | { |
| 380 | message_error(" Bad display count"); |
| 381 | } |
| 382 | else |
| 383 | { |
| 384 | gstate->displays = i; |
| 385 | } |
| 386 | break; |
| 387 | |
| 388 | case 's': |
| 389 | i = atoi(optarg); |
| 390 | if (i < 0 || (i == 0 && getuid() != 0)) |
| 391 | { |
| 392 | message_error(" Bad seconds delay"); |
| 393 | } |
| 394 | else |
| 395 | { |
| 396 | gstate->delay = i; |
| 397 | } |
| 398 | break; |
| 399 | |
| 400 | case 'u': |
| 401 | gstate->show_usernames = !gstate->show_usernames; |
| 402 | break; |
| 403 | |
| 404 | case 'U': |
| 405 | i = userid(optarg); |
| 406 | if (i == -1) |
| 407 | { |
| 408 | message_error(" Unknown user '%s'", optarg); |
| 409 | } |
| 410 | else |
| 411 | { |
| 412 | gstate->pselect.uid = i; |
| 413 | } |
| 414 | break; |
| 415 | |
| 416 | case 'm': |
| 417 | i = atoi(optarg); |
| 418 | gstate->pselect.mode = i; |
| 419 | break; |
| 420 | |
| 421 | case 'S': |
| 422 | gstate->pselect.system = !gstate->pselect.system; |
| 423 | break; |
| 424 | |
| 425 | case 'I': |
| 426 | gstate->pselect.idle = !gstate->pselect.idle; |
| 427 | break; |
| 428 | |
| 429 | case 'M': |
| 430 | enable_ncpus = 1; |
| 431 | break; |
| 432 | |
| 433 | |
| 434 | #ifdef ENABLE_COLOR |
| 435 | case 'T': |
| 436 | gstate->show_tags = 1; |
| 437 | break; |
| 438 | #endif |
| 439 | |
| 440 | case 'c': |
| 441 | gstate->pselect.fullcmd = !gstate->pselect.fullcmd; |
| 442 | break; |
| 443 | |
| 444 | case 't': |
| 445 | gstate->pselect.threads = !gstate->pselect.threads; |
| 446 | break; |
| 447 | |
| 448 | case 'q': /* be quick about it */ |
| 449 | /* only allow this if user is really root */ |
| 450 | if (getuid() == 0) |
| 451 | { |
| 452 | /* be very un-nice! */ |
| 453 | (void) nice(-20); |
| 454 | } |
| 455 | else |
| 456 | { |
| 457 | message_error(" Option -q can only be used by root"); |
| 458 | } |
| 459 | break; |
| 460 | |
| 461 | default: |
| 462 | fprintf(stderr, "\ |
| 463 | Top version %s\n\ |
| 464 | Usage: %s [-ISTabcinqu] [-d x] [-s x] [-o field] [-U username] [number]\n", |
| 465 | version_string(), myname); |
| 466 | exit(EX_USAGE); |
| 467 | } |
| 468 | } |
| 469 | |
| 470 | /* get count of top processes to display */ |
| 471 | if (optind < ac && *av[optind]) |
| 472 | { |
| 473 | if ((i = atoiwi(av[optind])) == Invalid) |
| 474 | { |
| 475 | message_error(" Process count not a number"); |
| 476 | } |
| 477 | else |
| 478 | { |
| 479 | gstate->topn = i; |
| 480 | } |
| 481 | } |
| 482 | } |
| 483 | |
| 484 | void |
| 485 | do_display(globalstate *gstate) |
| 486 | |
| 487 | { |
| 488 | int active_procs; |
| 489 | int i; |
| 490 | time_t curr_time; |
| 491 | caddr_t processes; |
| 492 | struct system_info system_info; |
| 493 | char *hdr; |
| 494 | |
| 495 | /* get the time */ |
| 496 | time_mark(&(gstate->now)); |
| 497 | curr_time = (time_t)(gstate->now.tv_sec); |
| 498 | |
| 499 | /* get the current stats */ |
| 500 | get_system_info(&system_info); |
| 501 | |
| 502 | /* get the current processes */ |
| 503 | processes = get_process_info(&system_info, &(gstate->pselect), gstate->order_index); |
| 504 | |
| 505 | /* determine number of processes to actually display */ |
| 506 | if (gstate->topn > 0) |
| 507 | { |
| 508 | /* this number will be the smallest of: active processes, |
| 509 | number user requested, number current screen accomodates */ |
| 510 | active_procs = system_info.P_ACTIVE; |
| 511 | if (active_procs > gstate->topn) |
| 512 | { |
| 513 | active_procs = gstate->topn; |
| 514 | } |
| 515 | if (active_procs > gstate->max_topn) |
| 516 | { |
| 517 | active_procs = gstate->max_topn; |
| 518 | } |
| 519 | } |
| 520 | else |
| 521 | { |
| 522 | /* dont show any */ |
| 523 | active_procs = 0; |
| 524 | } |
| 525 | |
| 526 | #ifdef HAVE_FORMAT_PROCESS_HEADER |
| 527 | /* get the process header to use */ |
| 528 | hdr = format_process_header(&(gstate->pselect), processes, active_procs); |
| 529 | #else |
| 530 | hdr = gstate->header_text; |
| 531 | #endif |
| 532 | |
| 533 | /* full screen or update? */ |
| 534 | if (gstate->fulldraw) |
| 535 | { |
| 536 | display_clear(); |
| 537 | i_loadave(system_info.last_pid, system_info.load_avg); |
| 538 | i_uptime(&(gstate->statics->boottime), &curr_time); |
| 539 | i_timeofday(&curr_time); |
| 540 | i_procstates(system_info.p_total, system_info.procstates, gstate->pselect.threads); |
| 541 | if (gstate->show_cpustates) |
| 542 | { |
| 543 | i_cpustates(system_info.cpustates); |
| 544 | } |
| 545 | else |
| 546 | { |
| 547 | if (smart_terminal) |
| 548 | { |
| 549 | z_cpustates(); |
| 550 | } |
| 551 | gstate->show_cpustates = Yes; |
| 552 | } |
| 553 | i_kernel(system_info.kernel); |
| 554 | i_memory(system_info.memory); |
| 555 | i_swap(system_info.swap); |
| 556 | i_message(&(gstate->now)); |
| 557 | i_header(hdr); |
| 558 | for (i = 0; i < active_procs; i++) |
| 559 | { |
| 560 | i_process(i, format_next_process(processes, gstate->get_userid)); |
| 561 | } |
| 562 | i_endscreen(); |
| 563 | if (gstate->smart_terminal) |
| 564 | { |
| 565 | gstate->fulldraw = No; |
| 566 | } |
| 567 | } |
| 568 | else |
| 569 | { |
| 570 | u_loadave(system_info.last_pid, system_info.load_avg); |
| 571 | u_uptime(&(gstate->statics->boottime), &curr_time); |
| 572 | i_timeofday(&curr_time); |
| 573 | u_procstates(system_info.p_total, system_info.procstates, gstate->pselect.threads); |
| 574 | u_cpustates(system_info.cpustates); |
| 575 | u_kernel(system_info.kernel); |
| 576 | u_memory(system_info.memory); |
| 577 | u_swap(system_info.swap); |
| 578 | u_message(&(gstate->now)); |
| 579 | u_header(hdr); |
| 580 | for (i = 0; i < active_procs; i++) |
| 581 | { |
| 582 | u_process(i, format_next_process(processes, gstate->get_userid)); |
| 583 | } |
| 584 | u_endscreen(); |
| 585 | } |
| 586 | } |
| 587 | |
| 588 | #ifdef DEBUG |
| 589 | void |
| 590 | timeval_xdprint(char *s, struct timeval tv) |
| 591 | |
| 592 | { |
| 593 | xdprintf("%s %d.%06d\n", s, tv.tv_sec, tv.tv_usec); |
| 594 | } |
| 595 | #endif |
| 596 | |
| 597 | void |
| 598 | do_wait(globalstate *gstate) |
| 599 | |
| 600 | { |
| 601 | struct timeval wait; |
| 602 | |
| 603 | wait.tv_sec = gstate->delay; |
| 604 | wait.tv_usec = 0; |
| 605 | select(0, NULL, NULL, NULL, &wait); |
| 606 | } |
| 607 | |
| 608 | void |
| 609 | do_command(globalstate *gstate) |
| 610 | |
| 611 | { |
| 612 | int status; |
| 613 | struct timeval wait = {0, 0}; |
| 614 | struct timeval now; |
| 615 | fd_set readfds; |
| 616 | unsigned char ch; |
| 617 | |
| 618 | /* calculate new refresh time */ |
| 619 | gstate->refresh = gstate->now; |
| 620 | gstate->refresh.tv_sec += gstate->delay; |
| 621 | time_get(&now); |
| 622 | |
| 623 | /* loop waiting for time to expire */ |
| 624 | do { |
| 625 | /* calculate time to wait */ |
| 626 | if (gstate->delay > 0) |
| 627 | { |
| 628 | wait = gstate->refresh; |
| 629 | wait.tv_usec -= now.tv_usec; |
| 630 | if (wait.tv_usec < 0) |
| 631 | { |
| 632 | wait.tv_usec += 1000000; |
| 633 | wait.tv_sec--; |
| 634 | } |
| 635 | wait.tv_sec -= now.tv_sec; |
| 636 | } |
| 637 | |
| 638 | /* set up arguments for select on stdin (0) */ |
| 639 | FD_ZERO(&readfds); |
| 640 | FD_SET(STDIN_FILENO, &readfds); |
| 641 | |
| 642 | /* wait for something to read or time out */ |
| 643 | if (select(32, &readfds, NULL, NULL, &wait) > 0) |
| 644 | { |
| 645 | /* read it */ |
| 646 | if (read(STDIN_FILENO, &ch, 1) != 1) |
| 647 | { |
| 648 | /* read error */ |
| 649 | message_error(" Read error on stdin"); |
| 650 | quit(EX_DATAERR); |
| 651 | /*NOTREACHED*/ |
| 652 | } |
| 653 | |
| 654 | /* mark pending messages as old */ |
| 655 | message_mark(); |
| 656 | |
| 657 | /* dispatch */ |
| 658 | status = command_process(gstate, (int)ch); |
| 659 | switch(status) |
| 660 | { |
| 661 | case CMD_ERROR: |
| 662 | quit(EX_SOFTWARE); |
| 663 | /*NOTREACHED*/ |
| 664 | |
| 665 | case CMD_REFRESH: |
| 666 | return; |
| 667 | |
| 668 | case CMD_UNKNOWN: |
| 669 | message_error(" Unknown command"); |
| 670 | break; |
| 671 | |
| 672 | case CMD_NA: |
| 673 | message_error(" Command not available"); |
| 674 | } |
| 675 | } |
| 676 | |
| 677 | /* get new time */ |
| 678 | time_get(&now); |
| 679 | } while (timercmp(&now, &(gstate->refresh), < )); |
| 680 | } |
| 681 | |
| 682 | void |
| 683 | do_minidisplay(globalstate *gstate) |
| 684 | |
| 685 | { |
| 686 | int real_delay; |
| 687 | struct system_info si; |
| 688 | |
| 689 | /* save the real delay and substitute 1 second */ |
| 690 | real_delay = gstate->delay; |
| 691 | gstate->delay = 1; |
| 692 | |
| 693 | /* wait 1 second for a command */ |
| 694 | time_mark(&(gstate->now)); |
| 695 | do_command(gstate); |
| 696 | |
| 697 | /* do a mini update that only updates the cpustates */ |
| 698 | get_system_info(&si); |
| 699 | u_cpustates(si.cpustates); |
| 700 | |
| 701 | /* restore the delay time */ |
| 702 | gstate->delay = real_delay; |
| 703 | |
| 704 | /* done */ |
| 705 | i_endscreen(); |
| 706 | } |
| 707 | |
| 708 | int |
| 709 | main(int argc, char *argv[]) |
| 710 | |
| 711 | { |
| 712 | char *env_top; |
| 713 | char **preset_argv; |
| 714 | int preset_argc = 0; |
| 715 | void *mask; |
| 716 | int need_mini = 1; |
| 717 | |
| 718 | struct statics statics; |
| 719 | globalstate *gstate; |
| 720 | |
| 721 | /* get our name */ |
| 722 | if (argc > 0) |
| 723 | { |
| 724 | if ((myname = strrchr(argv[0], '/')) == 0) |
| 725 | { |
| 726 | myname = argv[0]; |
| 727 | } |
| 728 | else |
| 729 | { |
| 730 | myname++; |
| 731 | } |
| 732 | } |
| 733 | |
| 734 | /* binary compatibility check */ |
| 735 | #ifdef HAVE_UNAME |
| 736 | { |
| 737 | struct utsname uts; |
| 738 | |
| 739 | if (uname(&uts) == 0) |
| 740 | { |
| 741 | if (strcmp(uts.machine, UNAME_HARDWARE) != 0) |
| 742 | { |
| 743 | fprintf(stderr, "%s: incompatible hardware platform\n", |
| 744 | myname); |
| 745 | exit(EX_UNAVAILABLE); |
| 746 | } |
| 747 | } |
| 748 | } |
| 749 | #endif |
| 750 | |
| 751 | /* initialization */ |
| 752 | gstate = (globalstate *)calloc(1, sizeof(globalstate)); |
| 753 | gstate->statics = &statics; |
| 754 | time_mark(NULL); |
| 755 | |
| 756 | /* preset defaults for various options */ |
| 757 | gstate->show_usernames = Yes; |
| 758 | gstate->topn = DEFAULT_TOPN; |
| 759 | gstate->delay = DEFAULT_DELAY; |
| 760 | gstate->fulldraw = Yes; |
| 761 | gstate->use_color = Yes; |
| 762 | gstate->interactive = Maybe; |
| 763 | |
| 764 | /* preset defaults for process selection */ |
| 765 | gstate->pselect.idle = Yes; |
| 766 | gstate->pselect.system = No; |
| 767 | gstate->pselect.fullcmd = No; |
| 768 | gstate->pselect.command = NULL; |
| 769 | gstate->pselect.uid = -1; |
| 770 | gstate->pselect.mode = 0; |
| 771 | |
| 772 | /* use a large buffer for stdout */ |
| 773 | #ifdef HAVE_SETVBUF |
| 774 | setvbuf(stdout, stdoutbuf, _IOFBF, BUFFERSIZE); |
| 775 | #else |
| 776 | #ifdef HAVE_SETBUFFER |
| 777 | setbuffer(stdout, stdoutbuf, BUFFERSIZE); |
| 778 | #endif |
| 779 | #endif |
| 780 | |
| 781 | /* get preset options from the environment */ |
| 782 | if ((env_top = getenv("TOP")) != NULL) |
| 783 | { |
| 784 | preset_argv = argparse(env_top, &preset_argc); |
| 785 | preset_argv[0] = myname; |
| 786 | do_arguments(gstate, preset_argc, preset_argv); |
| 787 | } |
| 788 | |
| 789 | /* process arguments */ |
| 790 | do_arguments(gstate, argc, argv); |
| 791 | |
| 792 | #ifdef ENABLE_COLOR |
| 793 | /* If colour has been turned on read in the settings. */ |
| 794 | env_top = getenv("TOPCOLOURS"); |
| 795 | if (!env_top) |
| 796 | { |
| 797 | env_top = getenv("TOPCOLORS"); |
| 798 | } |
| 799 | /* must do something about error messages */ |
| 800 | color_env_parse(env_top); |
| 801 | color_activate(gstate->use_color); |
| 802 | #endif |
| 803 | |
| 804 | /* in order to support forward compatability, we have to ensure that |
| 805 | the entire statics structure is set to a known value before we call |
| 806 | machine_init. This way fields that a module does not know about |
| 807 | will retain their default values */ |
| 808 | memzero((void *)&statics, sizeof(statics)); |
| 809 | statics.boottime = -1; |
| 810 | |
| 811 | /* call the platform-specific init */ |
| 812 | if (machine_init(&statics) == -1) |
| 813 | { |
| 814 | exit(EX_SOFTWARE); |
| 815 | } |
| 816 | |
| 817 | /* create a helper list of sort order names */ |
| 818 | gstate->order_namelist = string_list(statics.order_names); |
| 819 | |
| 820 | /* look up chosen sorting order */ |
| 821 | if (gstate->order_name != NULL) |
| 822 | { |
| 823 | int i; |
| 824 | |
| 825 | if (statics.order_names == NULL) |
| 826 | { |
| 827 | message_error(" This platform does not support arbitrary ordering"); |
| 828 | } |
| 829 | else if ((i = string_index(gstate->order_name, |
| 830 | statics.order_names)) == -1) |
| 831 | { |
| 832 | message_error(" Sort order `%s' not recognized", gstate->order_name); |
| 833 | message_error(" Recognized sort orders: %s", gstate->order_namelist); |
| 834 | } |
| 835 | else |
| 836 | { |
| 837 | gstate->order_index = i; |
| 838 | } |
| 839 | } |
| 840 | |
| 841 | /* initialize extensions */ |
| 842 | init_username(); |
| 843 | |
| 844 | /* initialize termcap */ |
| 845 | gstate->smart_terminal = screen_readtermcap(gstate->interactive); |
| 846 | |
| 847 | /* determine interactive state */ |
| 848 | if (gstate->interactive == Maybe) |
| 849 | { |
| 850 | gstate->interactive = smart_terminal; |
| 851 | } |
| 852 | |
| 853 | /* if displays were not specified, choose an appropriate default */ |
| 854 | if (gstate->displays == 0) |
| 855 | { |
| 856 | gstate->displays = gstate->smart_terminal ? Infinity: 1; |
| 857 | } |
| 858 | |
| 859 | /* we don't need a mini display when delay is less than 2 |
| 860 | seconds or when we are not on a smart terminal */ |
| 861 | if (gstate->delay <= 1 || !smart_terminal) |
| 862 | { |
| 863 | need_mini = 0; |
| 864 | } |
| 865 | |
| 866 | #ifndef HAVE_FORMAT_PROCESS_HEADER |
| 867 | /* set constants for username/uid display */ |
| 868 | if (gstate->show_usernames) |
| 869 | { |
| 870 | gstate->header_text = format_header("USERNAME"); |
| 871 | gstate->get_userid = username; |
| 872 | } |
| 873 | else |
| 874 | { |
| 875 | gstate->header_text = format_header(" UID "); |
| 876 | gstate->get_userid = itoa7; |
| 877 | } |
| 878 | #endif |
| 879 | gstate->pselect.usernames = gstate->show_usernames; |
| 880 | |
| 881 | /* initialize display */ |
| 882 | if ((gstate->max_topn = display_init(&statics)) == -1) |
| 883 | { |
| 884 | fprintf(stderr, "%s: can't allocate sufficient memory\n", myname); |
| 885 | exit(EX_OSERR); |
| 886 | } |
| 887 | |
| 888 | /* check for infinity and for overflowed screen */ |
| 889 | if (gstate->topn == Infinity) |
| 890 | { |
| 891 | gstate->topn = INT_MAX; |
| 892 | } |
| 893 | else if (gstate->topn > gstate->max_topn) |
| 894 | { |
| 895 | message_error(" This terminal can only display %d processes", |
| 896 | gstate->max_topn); |
| 897 | } |
| 898 | |
| 899 | #ifdef ENABLE_COLOR |
| 900 | /* producing a list of color tags is easy */ |
| 901 | if (gstate->show_tags) |
| 902 | { |
| 903 | color_dump(stdout); |
| 904 | exit(EX_OK); |
| 905 | } |
| 906 | #endif |
| 907 | |
| 908 | /* hold all signals while we initialize the screen */ |
| 909 | mask = hold_signals(); |
| 910 | screen_init(); |
| 911 | |
| 912 | /* set the signal handlers */ |
| 913 | set_signals(); |
| 914 | |
| 915 | /* longjmp re-entry point */ |
| 916 | /* set the jump buffer for long jumps out of signal handlers */ |
| 917 | if (setjmp(jmp_int) != 0) |
| 918 | { |
| 919 | /* this is where we end up after processing sigwinch or sigtstp */ |
| 920 | |
| 921 | /* tell display to resize its buffers, and get the new length */ |
| 922 | if ((gstate->max_topn = display_resize()) == -1) |
| 923 | { |
| 924 | /* thats bad */ |
| 925 | quit(EX_OSERR); |
| 926 | /*NOTREACHED*/ |
| 927 | } |
| 928 | |
| 929 | /* set up for a full redraw, and get the current line count */ |
| 930 | gstate->fulldraw = Yes; |
| 931 | |
| 932 | /* safe to release the signals now */ |
| 933 | release_signals(mask); |
| 934 | } |
| 935 | else |
| 936 | { |
| 937 | /* release the signals */ |
| 938 | release_signals(mask); |
| 939 | |
| 940 | /* some systems require a warmup */ |
| 941 | /* always do a warmup for batch mode */ |
| 942 | if (gstate->interactive == 0 || statics.flags.warmup) |
| 943 | { |
| 944 | struct system_info system_info; |
| 945 | struct timeval timeout; |
| 946 | |
| 947 | time_mark(&(gstate->now)); |
| 948 | get_system_info(&system_info); |
| 949 | (void)get_process_info(&system_info, &gstate->pselect, 0); |
| 950 | timeout.tv_sec = 1; |
| 951 | timeout.tv_usec = 0; |
| 952 | select(0, NULL, NULL, NULL, &timeout); |
| 953 | |
| 954 | /* if we've warmed up, then we can show good states too */ |
| 955 | gstate->show_cpustates = Yes; |
| 956 | need_mini = 0; |
| 957 | } |
| 958 | } |
| 959 | |
| 960 | /* main loop */ |
| 961 | while ((gstate->displays == -1) || (--gstate->displays > 0)) |
| 962 | { |
| 963 | do_display(gstate); |
| 964 | if (gstate->interactive) |
| 965 | { |
| 966 | if (need_mini) |
| 967 | { |
| 968 | do_minidisplay(gstate); |
| 969 | need_mini = 0; |
| 970 | } |
| 971 | do_command(gstate); |
| 972 | } |
| 973 | else |
| 974 | { |
| 975 | do_wait(gstate); |
| 976 | } |
| 977 | } |
| 978 | |
| 979 | /* do one last display */ |
| 980 | do_display(gstate); |
| 981 | |
| 982 | quit(EX_OK); |
| 983 | /* NOTREACHED */ |
| 984 | return 1; /* Keep compiler quiet. */ |
| 985 | } |