mdw@git.distorted.org.uk Git - sw-tools/blob - src/sw_build.c

   1 /* -*-c-*-
   2  *
   3  * $Id: sw_build.c,v 1.2 1999/07/16 12:50:24 mdw Exp $
   4  *
   5  * Management of build processes
   6  *
   7  * (c) 1999 EBI
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of sw-tools.
  13  *
  14  * sw-tools is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * sw-tools is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with sw-tools; if not, write to the Free Software Foundation,
  26  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  27  */
  28
  29 /*----- Revision history --------------------------------------------------*
  30  *
  31  * $Log: sw_build.c,v $
  32  * Revision 1.2  1999/07/16 12:50:24  mdw
  33  * Improve exit status display.  New interface from `doto' project.
  34  *
  35  * Revision 1.1.1.1  1999/06/02 16:53:34  mdw
  36  * Initial import.
  37  *
  38  */
  39
  40 /*----- Header files ------------------------------------------------------*/
  41
  42 #include "config.h"
  43
  44 #include <ctype.h>
  45 #include <errno.h>
  46 #include <signal.h>
  47 #include <stdarg.h>
  48 #include <stdio.h>
  49 #include <stdlib.h>
  50 #include <string.h>
  51
  52 #include <sys/types.h>
  53 #include <sys/time.h>
  54 #include <sys/select.h>
  55 #include <sys/stat.h>
  56 #include <unistd.h>
  57 #include <fcntl.h>
  58 #include <sys/wait.h>
  59
  60 #ifndef DECL_ENVIRON
  61   extern char **environ;
  62 #endif
  63
  64 #include <mLib/alloc.h>
  65 #include <mLib/dstr.h>
  66 #include <mLib/exc.h>
  67 #include <mLib/quis.h>
  68 #include <mLib/report.h>
  69
  70 #include "sw.h"
  71 #include "sw_arch.h"
  72 #include "sw_build.h"
  73 #include "sw_info.h"
  74 #include "sw_rsh.h"
  75
  76 #define PRES_LINK 0
  77 #define PRES_DEFAULT 0
  78 #define PRES_PREFERENCE 0
  79 #include "pres_plain.h"
  80 #include "pres_curses.h"
  81
  82 /*----- Data structures ---------------------------------------------------*/
  83
  84 /*----- Static variables --------------------------------------------------*/
  85
  86 static pres *preslist = PRES_LINK;
  87
  88 /*----- Main code ---------------------------------------------------------*/
  89
  90 /* --- @swbuild_archlist@ --- *
  91  *
  92  * Arguments:   @swinfo *sw@ = pointer to the build information block
  93  *
  94  * Returns:     A list of architectures which are to be built.
  95  *
  96  * Use:         Decides which architectures need building, and returns them
  97  *              in a list.
  98  */
  99
 100 archcons *swbuild_archlist(swinfo *sw)
 101 {
 102   archcons *a = arch_readtab();
 103   const char *only = 0;
 104   unsigned and = 0, xor = 0;
 105
 106   /* --- Restrict the architecture list appropriately --- */
 107
 108   only = opt_arch ? opt_arch : sw->only_arch;
 109
 110   /* --- Apply the built flags --- */
 111
 112   if (!(opt_flags & optFlag_force) && sw->arch) {
 113     archcons *aa = arch_filter(a, sw->arch, 0, 0);
 114     archcons *c;
 115     for (c = aa; c; c = c->cdr)
 116       c->car->flags |= archFlag_built;
 117     arch_free(aa);
 118     and |= archFlag_built;
 119   }
 120
 121   return (arch_filter(a, only, and, xor));
 122 }
 123
 124 /*----- Main build command ------------------------------------------------*/
 125
 126 /* --- @sw_run@ --- *
 127  *
 128  * Arguments:   @int argc@ = number of command line arguments
 129  *              @char *argv[]@ = array of command line arguments
 130  *
 131  * Returns:     Zero on success (all builds OK) or nonzero for failure.
 132  *
 133  * Use:         Runs a multi-architecture build.
 134  */
 135
 136 int sw_run(int argc, char *argv[])
 137 {
 138   swinfo sw;
 139   archcons *a;
 140   pres *p = PRES_DEFAULT;
 141   fd_set fdin;
 142   int active = 0;
 143   int maxfd = 0;
 144   int rc = 0;
 145
 146   /* --- Handle help on output styles --- */
 147
 148   if (opt_output && strcmp(opt_output, "help") == 0) {
 149     printf("Presentation styles supported:");
 150     for (p = preslist; p; p = p->next)
 151       printf(" %s", p->name);
 152     putc('\n', stdout);
 153     printf("The default presentation style is %s\n", (PRES_DEFAULT)->name);
 154     exit(0);
 155   }
 156
 157   /* --- Validate arguments --- */
 158
 159   if (!argv[1])
 160     die(1, "Usage: run COMMAND [ARG...]");
 161
 162   /* --- Choose an output presentation style --- */
 163
 164   if (opt_output) {
 165     pres *q;
 166     size_t sz = strlen(opt_output);
 167     p = 0;
 168
 169     for (q = preslist; q; q = q->next) {
 170       if (strncmp(opt_output, q->name, sz) == 0) {
 171         if (q->name[sz] == 0) {
 172           p = q;
 173           break;
 174         } else if (p)
 175           die(1, "ambiguous output style `%s'", opt_output);
 176         else
 177           p = q;
 178       }
 179     }
 180
 181     if (!p)
 182       die(1, "unknown output style `%s'", opt_output);
 183   }
 184
 185   if (p->ok && !p->ok()) {
 186     moan("output style `%s' can't run; using `plain' instead", p->name);
 187     p = &pres_plain;
 188   }
 189
 190   /* --- Decide on an architecture --- */
 191
 192   if (swinfo_fetch(&sw)) {
 193     die(1, "couldn't read build status: %s (try running setup)",
 194         strerror(errno));
 195   }
 196   swinfo_sanity(&sw);
 197   a = swbuild_archlist(&sw);
 198
 199   if (!a) {
 200     moan("All desired architectures already built OK.");
 201     moan("(Perhaps you forgot `--force', or want to say `%s reset'.)", QUIS);
 202     return (0);
 203   }
 204
 205   /* --- Tie on remote context blocks, and crank up the presentation --- */
 206
 207   {
 208     archcons *aa;
 209
 210     for (aa = a; aa; aa = aa->cdr)
 211       aa->car->r = xmalloc(sizeof(sw_remote));
 212     if (p->init && p->init(a))
 213       die(1, "presentation style refused to start: %s", strerror(errno));
 214   }
 215
 216   signal(SIGINT, SIG_IGN);
 217   signal(SIGQUIT, SIG_IGN);
 218
 219   /* --- Trap any exceptions coming this way --- *
 220    *
 221    * It's important, for example, that a curses-based presentation system
 222    * reset the terminal flags appropriately.
 223    */
 224
 225   TRY {
 226     /* --- Run remote build processes on the remote hosts --- */
 227
 228     {
 229       archcons *aa;
 230
 231       FD_ZERO(&fdin);
 232       for (aa = a; aa; aa = aa->cdr) {
 233         archent *e = aa->car;
 234         sw_remote *r = e->r;
 235         if (swrsh(r, e->flags & archFlag_home ? 0 : e->host,
 236                   "build", argv + 1)) {
 237           dstr d = DSTR_INIT;
 238           dstr_putf(&d, "%s: couldn't start build for architecture `%s': %s",
 239                     QUIS, e->arch, strerror(errno));
 240           p->output(e, d.buf, d.len);
 241           free(r);
 242           e->r = 0;
 243           dstr_destroy(&d);
 244         } else {
 245           int fd = r->fdin;
 246           if (fd > maxfd)
 247             maxfd = fd;
 248           active++;
 249           FD_SET(fd, &fdin);
 250         }
 251       }
 252     }
 253
 254     /* --- Watch the builds until they do something interesting --- */
 255
 256     maxfd++;
 257     while (active) {
 258       fd_set f;
 259       int n;
 260       archcons *aa;
 261
 262       /* --- Find out what interesting things are happening --- */
 263
 264       memcpy(&f, &fdin, sizeof(f));
 265       n = select(maxfd, &f, 0, 0, 0);
 266       if (n < 0) {
 267         if (errno == EINTR || errno == EAGAIN)
 268           continue;
 269         else
 270           THROW(EXC_ERRNO, errno);
 271       }
 272
 273       /* --- Scan through for jobs which need attention --- */
 274
 275       for (aa = a; aa; aa = aa->cdr) {
 276         archent *e = aa->car;
 277         sw_remote *r = e->r;
 278         int t;
 279
 280         if (!FD_ISSET(r->fdin, &f))
 281           continue;
 282
 283         switch (t = pkrecv(r)) {
 284
 285           case PKTYPE_DATA:
 286             p->output(e, r->buf, r->sz);
 287             break;
 288
 289           case PKTYPE_STATUS: {
 290             dstr d = DSTR_INIT;
 291             int ok = 1;
 292             if (r->sz != 1) {
 293               r->buf[r->sz] = 0;
 294               dstr_putf(&d, "failed (%s)", r->buf);
 295               ok = 0;
 296               rc = 1;
 297             } else if (r->buf[0]) {
 298               dstr_putf(&d, "failed (status %u)", (unsigned char)r->buf[0]);
 299               ok = 0;
 300               rc = 1;
 301             } else {
 302               dstr_puts(&d, "finished");
 303               if (opt_flags & optFlag_install)
 304                 e->flags |= archFlag_built;
 305             }
 306             if (p->close)
 307               p->close(e, ok, d.buf);
 308             dstr_destroy(&d);
 309             FD_CLR(r->fdin, &fdin);
 310             close(r->fdin);
 311             active--;
 312           } break;
 313
 314           case PKTYPE_EOF: {
 315             if (p->close)
 316               p->close(e, 0, "unexpected exit");
 317             rc = 1;
 318             FD_CLR(r->fdin, &fdin);
 319             close(r->fdin);
 320             active--;
 321           } break;
 322
 323           default: {
 324             const static char msg[] = "\n[Unexpected packet, type %i]\n";
 325             p->output(e, msg, sizeof(msg) - 1);
 326           } break;
 327         }
 328       }
 329     }
 330   }
 331
 332   /* --- Handle any exceptions coming this way --- *
 333    *
 334    * I could do more cleanup here (freeing buffers and so) but it's not worth
 335    * it.  Nobody's bothering to catch exceptions anyway.
 336    */
 337
 338   CATCH {
 339     if (p->abort)
 340       p->abort(a);
 341     switch (exc_type) {
 342       case EXC_ERRNO:
 343         die(1, "unexpected error: %s", strerror(exc_i));
 344         break;
 345       default:
 346         RETHROW;
 347         break;
 348     }
 349   } END_TRY;
 350
 351   /* --- Tell the presentation that everything's done --- */
 352
 353   if (p->done)
 354     p->done(a);
 355   else if (opt_flags & optFlag_beep)
 356     putchar('\a');
 357
 358   /* --- Clean up the unwanted remote contexts --- */
 359
 360   {
 361     archcons *aa;
 362     for (aa = a; aa; aa = aa->cdr)
 363       free(a->car->r);
 364   }
 365
 366   /* --- Tidy away the architecture list --- */
 367
 368   arch_free(a);
 369
 370   /* --- Mark built architectures as having been completed now --- */
 371
 372   if (opt_flags & optFlag_install) {
 373     swinfo skel;
 374     dstr d = DSTR_INIT;
 375     swinfo_clear(&skel);
 376     arch_toText(&d, arch_readtab(), archFlag_built, archFlag_built);
 377     skel.arch = d.buf;
 378     swinfo_update(&sw, &skel);
 379     dstr_destroy(&d);
 380     if (swinfo_put(&sw))
 381       die(1, "error writing build status: %s", strerror(errno));
 382   }
 383   return (rc);
 384 }
 385
 386 /*----- Main remote entry point -------------------------------------------*/
 387
 388 /* --- @putf@ --- *
 389  *
 390  * Arguments:   @sw_remote *r@ = pointer to remote context
 391  *              @FILE *fp@ = log file handle
 392  *              @const char *fmt@ = format string
 393  *              @...@ = other arguments
 394  *
 395  * Returns:     ---
 396  *
 397  * Use:         Reports a string to the log file and the remote controller
 398  *              process.
 399  */
 400
 401 static void putf(sw_remote *r, FILE *fp, const char *fmt, ...)
 402 {
 403   va_list ap;
 404   dstr d = DSTR_INIT;
 405   va_start(ap, fmt);
 406   dstr_vputf(&d, fmt, ap);
 407   va_end(ap);
 408   if (r)
 409     pksend(r, PKTYPE_DATA, d.buf, d.len);
 410   if (fp)
 411     fwrite(d.buf, 1, d.len, fp);
 412   dstr_destroy(&d);
 413 }
 414
 415 /* --- @swrsh_build@ --- *
 416  *
 417  * Arguments:   @sw_remote *r@ = pointer to remote context
 418  *              @char *argv[]@ = pointer to argument list
 419  *              @char *env[]@ = pointer to environment list
 420  *
 421  * Returns:     Doesn't.
 422  *
 423  * Use:         Runs a remote build command.
 424  */
 425
 426 void swrsh_build(sw_remote *r, char *argv[], char *env[])
 427 {
 428   FILE *logfp;
 429   int fd[2];
 430   pid_t kid;
 431
 432   /* --- Validate arguments --- */
 433
 434   if (!argv[0])
 435     swdie(r, 1, "Usage: build COMMAND [ARG...]");
 436
 437   /* --- Change into architecture directory --- */
 438
 439   if (mkdir(ARCH, 0775) && errno != EEXIST)
 440     swdie(r, 1, "mkdir(`%s') failed: %s", ARCH, strerror(errno));
 441   if (chdir(ARCH)) {
 442     swdie(r, 1, "couldn't change directory to `%s': %s",
 443           ARCH, strerror(errno));
 444   }
 445   if (pipe(fd))
 446     swdie(r, 1, "couldn't create pipe: %s", strerror(errno));
 447
 448   /* --- Open the log file --- */
 449
 450   {
 451     int logfd = open(".build-log", O_WRONLY | O_APPEND | O_CREAT, 0664);
 452     time_t t;
 453     struct tm *tm;
 454     char buf[64];
 455     char **p;
 456
 457     if (logfd < 0)
 458       swdie(r, 1, "couldn't open `.build-log' file: %s", strerror(errno));
 459     if ((logfp = fdopen(logfd, "a")) == 0) {
 460       swdie(r, 1, "couldn't open stream on `.build-log' file: %s",
 461             strerror(errno));
 462     }
 463     t = time(0);
 464     tm = localtime(&t);
 465     strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm);
 466     fprintf(logfp, "\n\n*** %s: started build: %s", buf, argv[0]);
 467     for (p = argv + 1; *p; p++)
 468       fprintf(logfp, " %s", *p);
 469     fputs("\n\n", logfp);
 470   }
 471
 472   /* --- Start off the child process --- */
 473
 474   kid = fork();
 475   if (kid == 0) {
 476     int nullfd;
 477     close(fd[0]);
 478     dup2(fd[1], 1);
 479     dup2(fd[1], 2);
 480     if (fd[1] > 2)
 481       close(fd[1]);
 482     close(0);
 483     nullfd = open("/dev/null", O_RDONLY);
 484     if (nullfd > 0) {
 485       dup2(nullfd, 0);
 486       close(nullfd);
 487     }
 488     environ = env;
 489     execvp(argv[0], argv);
 490     fprintf(stderr, "failed to start `%s': %s\n", argv[0], strerror(errno));
 491     _exit(127);
 492   }
 493
 494   /* --- Read from the pipe, and write to the socket and logfile --- */
 495
 496   close(fd[1]);
 497   for (;;) {
 498     ssize_t n = read(fd[0], r->buf, PKMAX);
 499     if (!n)
 500       break;
 501     if (n < 0) {
 502       putf(r, logfp, "*** error reading from pipe: %s\n", strerror(errno));
 503       kill(kid, SIGTERM);
 504       break;
 505     }
 506     fwrite(r->buf, 1, n, logfp);
 507     pksend(r, PKTYPE_DATA, r->buf, n);
 508   }
 509   close(fd[0]);
 510
 511   /* --- Reap exit status and produce final report --- */
 512
 513   {
 514     int status;
 515     if (waitpid(kid, &status, 0) < 0)
 516       putf(r, logfp, "*** error reading exit status: %s\n", strerror(errno));
 517     else {
 518       if (WIFSIGNALED(status))
 519         fprintf(logfp, "*** exited on signal %i\n", WTERMSIG(status));
 520       else if (WIFEXITED(status))
 521         fprintf(logfp, "*** exited with status %i\n", WEXITSTATUS(status));
 522       else
 523         fprintf(logfp, "*** reaped, but didn't exit.  Strange\n");
 524     }
 525     fclose(logfp);
 526     swwait(r, status);
 527   }
 528 }
 529
 530 /*----- Syntactic sugar ---------------------------------------------------*/
 531
 532 /*
 533  * `Syntactic sugar causes cancer of the semicolon.'
 534  *              -- Alan Perlis, `Epigrams in Programming'
 535  */
 536
 537 /* --- @build@ --- *
 538  *
 539  * Arguments:   @char **u@ = first segment
 540  *              @char **v@ = second segment
 541  *
 542  * Returns:     Return code from the build.
 543  *
 544  * Use:         Combines two @argv@-style arrays and then runs a build on the
 545  *              result.
 546  */
 547
 548 static int build(char **u, char **v)
 549 {
 550   size_t i, j;
 551   char **p;
 552
 553   for (i = 0, p = u; *p; p++, i++) ;
 554   for (j = 0, p = v; *p; p++, j++) ;
 555   p = xmalloc((i + j + 2) * sizeof(char **));
 556   memcpy(p + 1, u, i * sizeof(char **));
 557   memcpy(p + i + 1, v, j * sizeof(char **));
 558   p[0] = p[i + j + 1] = 0;
 559   return (sw_run(i + j + 1, p));
 560 }
 561
 562 /* --- @sw_make@ --- */
 563
 564 int sw_make(int argc, char *argv[])
 565 {
 566   static char *mk[] = { 0, 0 };
 567   if (!mk[0]) {
 568     char *m;
 569     if ((m = getenv("SW_MAKE")) == 0 &&
 570         (m = getenv("MAKE")) == 0)
 571       m = "make";
 572     mk[0] = m;
 573   }
 574   return (build(mk, argv + 1));
 575 }
 576
 577 /* --- @sw_conf@ --- */
 578
 579 int sw_conf(int argc, char *argv[])
 580 {
 581   static char *cf[] = { "../configure", "--prefix=" PREFIX, 0 };
 582   return (build(cf, argv + 1));
 583 }
 584
 585 /*----- Other subcommands -------------------------------------------------*/
 586
 587 /* --- @sw_reset@ --- */
 588
 589 int sw_reset(int argc, char *argv[])
 590 {
 591   swinfo sw, skel;
 592   if (argc != 1)
 593     die(1, "Usage: reset");
 594   if (swinfo_fetch(&sw)) {
 595     die(1, "couldn't read build status: %s (try running setup)",
 596         strerror(errno));
 597   }
 598   swinfo_sanity(&sw);
 599   swinfo_clear(&skel);
 600   skel.arch = "";
 601   swinfo_update(&sw, &skel);
 602   if (swinfo_put(&sw))
 603     die(1, "couldn't write build status: %s", strerror(errno));
 604   return (0);
 605 }
 606
 607 /*----- That's all, folks -------------------------------------------------*/