src/pwmd.c

   1 /* vim:tw=78:ts=8:sw=4:set ft=c:  */
   2 /*
   3     Copyright (C) 2006-2007 Ben Kibbey <bjk@luxsci.net>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18 */
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22 #include <err.h>
  23 #include <errno.h>
  24 #include <ctype.h>
  25 #include <string.h>
  26 #include <sys/un.h>
  27 #include <signal.h>
  28 #include <stdarg.h>
  29 #include <string.h>
  30 #include <sys/wait.h>
  31 #include <fcntl.h>
  32 #include <pwd.h>
  33 #include <glib.h>
  34 #include <glib/gprintf.h>
  35 #include <gcrypt.h>
  36 #include <sys/mman.h>
  37 #include <termios.h>
  38 #include <assert.h>
  39 #include <syslog.h>
  40
  41 #ifdef HAVE_CONFIG_H
  42 #include <config.h>
  43 #endif
  44
  45 #ifdef HAVE_SETRLIMIT
  46 #include <sys/time.h>
  47 #include <sys/resource.h>
  48 #endif
  49
  50 #ifdef HAVE_ZLIB_H
  51 #include <zlib.h>
  52 #endif
  53
  54 #ifndef MEM_DEBUG
  55 #include "mem.h"
  56 #endif
  57
  58 #include "xml.h"
  59 #include "common.h"
  60 #include "commands.h"
  61 #include "pwmd_error.h"
  62 #include "cache.h"
  63 #include "pwmd.h"
  64
  65 static void clear_rcfile_key()
  66 {
  67     gsize n;
  68     gchar **groups;
  69     gchar **p;
  70
  71     groups = g_key_file_get_groups(keyfileh, &n);
  72
  73     for (p = groups; *p; p++) {
  74         GError *error = NULL;
  75
  76         if (g_key_file_has_key(keyfileh, *p, "key", &error) == TRUE)
  77              g_key_file_set_string(keyfileh, *p, "key", "");
  78     }
  79
  80     g_strfreev(groups);
  81 }
  82
  83 static void reload_rcfile()
  84 {
  85     log_write(N_("reloading configuration file '%s'"), rcfile);
  86     g_key_file_free(keyfileh);
  87     keyfileh = parse_rcfile(0);
  88     clear_rcfile_key();
  89 }
  90
  91 gpg_error_t send_syserror(assuan_context_t ctx, gint e)
  92 {
  93     gpg_error_t n = gpg_error_from_errno(e);
  94
  95     return assuan_process_done(ctx, assuan_set_error(ctx, n, gpg_strerror(n)));
  96 }
  97
  98 gpg_error_t send_error(assuan_context_t ctx, gpg_error_t e)
  99 {
 100     gpg_err_code_t n = gpg_err_code(e);
 101     gpg_error_t code = gpg_err_make(GPG_ERR_SOURCE_USER_1, n);
 102
 103     if (!e)
 104         return assuan_process_done(ctx, 0);
 105
 106     if (!ctx) {
 107         log_write("%s\n", pwmd_strerror(e));
 108         return e;
 109     }
 110
 111     if (n == EPWMD_LIBXML_ERROR) {
 112         xmlErrorPtr xml_error = xmlGetLastError();
 113         return assuan_process_done(ctx, assuan_set_error(ctx, code, xml_error->message));
 114     }
 115
 116     return assuan_process_done(ctx, assuan_set_error(ctx, code, pwmd_strerror(e)));
 117 }
 118
 119 void log_write(const gchar *fmt, ...)
 120 {
 121     gchar *args, *line;
 122     va_list ap;
 123     struct tm *tm;
 124     time_t now;
 125     gchar tbuf[21];
 126     gint fd = -1;
 127
 128     if ((!logfile && !isatty(STDERR_FILENO) && log_syslog == FALSE) || !fmt)
 129         return;
 130
 131     if (logfile) {
 132         if ((fd = open(logfile, O_WRONLY|O_CREAT|O_APPEND, 0600)) == -1) {
 133             warn(N_("logfile"));
 134             return;
 135         }
 136     }
 137
 138     va_start(ap, fmt);
 139
 140     if (g_vasprintf(&args, fmt, ap) == -1) {
 141         va_end(ap);
 142         return;
 143     }
 144
 145     if (log_syslog == TRUE)
 146         syslog(LOG_INFO, "%s", args);
 147
 148     va_end(ap);
 149     time(&now);
 150     tm = localtime(&now);
 151     strftime(tbuf, sizeof(tbuf), "%b %d %Y %H:%M:%S ", tm);
 152     tbuf[sizeof(tbuf) - 1] = 0;
 153     line = g_strdup_printf("%s %i %s\n", tbuf, getpid(), args);
 154
 155     if (!line) {
 156         if (logfile)
 157             close(fd);
 158
 159         g_free(args);
 160         return;
 161     }
 162
 163     if (logfile) {
 164         write(fd, line, strlen(line));
 165         fsync(fd);
 166         close(fd);
 167     }
 168
 169     if (isatty(STDERR_FILENO)) {
 170         fprintf(stderr, "%s", line);
 171         fflush(stderr);
 172     }
 173
 174     g_free(line);
 175     g_free(args);
 176 }
 177
 178 static void usage(gchar *pn)
 179 {
 180     g_printf(N_(
 181             "Usage: %s [-hvDb] [-f <rcfile>] [-I <filename>] [file1] [...]\n"
 182             "    -b  run as a background process\n"
 183             "    -f  load the specified rcfile (~/.pwmd/config)\n"
 184             "    -I  import an XML file and write the encrypted data to stdout\n"
 185             "    -D  disable use of the LIST and DUMP commands\n"
 186             "    -v  version\n"
 187             "    -h  this help text\n"
 188             ), pn);
 189     exit(EXIT_SUCCESS);
 190 }
 191
 192 #ifndef MEM_DEBUG
 193 static int gcry_SecureCheck(const void *ptr)
 194 {
 195     return 1;
 196 }
 197 #endif
 198
 199 static void setup_gcrypt()
 200 {
 201     gcry_check_version(NULL);
 202
 203 #ifndef MEM_DEBUG
 204     gcry_set_allocation_handler(xmalloc, xmalloc, gcry_SecureCheck, xrealloc,
 205             xfree);
 206 #endif
 207
 208     if (gcry_cipher_algo_info(GCRY_CIPHER_AES256, GCRYCTL_TEST_ALGO, NULL,
 209                 NULL) != 0)
 210         errx(EXIT_FAILURE, N_("Required AES cipher not supported by libgcrypt."));
 211
 212     gcry_cipher_algo_info(GCRY_CIPHER_AES256, GCRYCTL_GET_KEYLEN, NULL, &gcrykeysize);
 213     gcry_cipher_algo_info(GCRY_CIPHER_AES256, GCRYCTL_GET_BLKLEN, NULL, &gcryblocksize);
 214 }
 215
 216 static assuan_context_t new_connection(gint fd)
 217 {
 218     gpg_error_t rc;
 219     gchar ver[ASSUAN_LINELENGTH];
 220     assuan_context_t ctx;
 221
 222     rc = assuan_init_socket_server_ext(&ctx, fd, 2);
 223
 224     if (rc)
 225         goto fail;
 226
 227     g_snprintf(ver, sizeof(ver), "%s", PACKAGE_STRING);
 228     assuan_set_hello_line(ctx, ver);
 229     assuan_register_post_cmd_notify(ctx, command_finalize);
 230     rc = register_commands(ctx);
 231
 232     if (rc)
 233         goto fail;
 234
 235     rc = assuan_accept(ctx);
 236
 237     if (rc)
 238         goto fail;
 239
 240     return ctx;
 241
 242 fail:
 243     assuan_deinit_server(ctx);
 244     log_write("%s", gpg_strerror(rc));
 245     return NULL;
 246 }
 247
 248 void send_cache_status_all()
 249 {
 250     guint i, t;
 251
 252     for (t = g_slist_length(cn_thread_list), i = 0; i < t; i++) {
 253         struct client_thread_s *cn = g_slist_nth_data(cn_thread_list, i);
 254
 255         if (cn->tid == pth_self()) {
 256             send_cache_status(cn->cl->ctx);
 257             continue;
 258         }
 259
 260         pth_raise(cn->tid, SIGUSR2);
 261     }
 262 }
 263
 264 static void *keepalive_thread(void *arg)
 265 {
 266     struct client_thread_s *thd = arg;
 267     gint k = get_key_file_integer("default", "keepalive");
 268     pth_event_t ev;
 269     sigset_t set;
 270
 271     if (k <= 0)
 272         pth_exit(NULL);
 273
 274     ev = pth_event(PTH_EVENT_TIME, pth_timeout(k, 0));
 275     sigemptyset(&set);
 276     sigaddset(&set, SIGALRM);
 277
 278     for (;;) {
 279         gint sig = 0;
 280         gpg_error_t error;
 281
 282         pth_sigwait_ev(&set, &sig, ev);
 283         pth_event_free(ev, PTH_FREE_THIS);
 284         ev = pth_event(PTH_EVENT_TIME, pth_timeout(k, 0));
 285
 286         if (sig)
 287             break;
 288
 289         error = assuan_write_status(thd->cl->ctx, "KEEPALIVE", NULL);
 290
 291         if (error) {
 292             pth_raise(thd->tid, SIGQUIT);
 293             break;
 294         }
 295     }
 296
 297     pth_event_free(ev, PTH_FREE_THIS);
 298     return NULL;
 299 }
 300
 301 /*
 302  * Called every time a connection is made via pth_spawn(). This is the thread
 303  * entry point.
 304  */
 305 static void *client_thread(void *data)
 306 {
 307     struct client_thread_s *thd = data;
 308     gint fd = thd->fd;
 309     pth_event_t ev;
 310     struct client_s *cl = g_malloc0(sizeof(struct client_s));
 311     sigset_t set;
 312
 313     if (!cl) {
 314         log_write("%s(%i): %s", __FILE__, __LINE__, strerror(ENOMEM));
 315         goto fail;
 316     }
 317
 318     thd->cl = cl;
 319
 320     /*
 321      * This is a "child" thread. Don't catch any signals. Let the master
 322      * thread take care of signals in server_loop().
 323      */
 324     sigfillset(&set);
 325     pth_sigmask(SIG_BLOCK, &set, NULL);
 326     sigemptyset(&set);
 327     /* Sends a cache status message to the client. */
 328     sigaddset(&set, SIGUSR2);
 329     /* Terminates this thread. Raised from keepalive_thread(). */
 330     sigaddset(&set, SIGQUIT);
 331
 332     cl->ctx = new_connection(fd);
 333     cl->fd = fd;
 334
 335     if (!cl->ctx)
 336         goto fail;
 337
 338     assuan_set_pointer(cl->ctx, cl);
 339
 340 #ifdef HAVE_MLOCKALL
 341     if (disable_mlock == FALSE && mlockall(MCL_FUTURE) == -1) {
 342         log_write("mlockall(): %s", strerror(errno));
 343         goto fail;
 344     }
 345 #endif
 346
 347     send_cache_status(cl->ctx);
 348     ev = pth_event(PTH_EVENT_FD|PTH_UNTIL_FD_READABLE, cl->fd);
 349     thd->keepalive_tid = pth_spawn(NULL, keepalive_thread, thd);
 350
 351     for (;;) {
 352         gpg_error_t rc;
 353         gint sig = 0;
 354
 355         pth_sigwait_ev(&set, &sig, ev);
 356
 357         if (sig > 0) {
 358             switch (sig) {
 359                 case SIGUSR2:
 360                     send_cache_status(cl->ctx);
 361                     continue;
 362                 case SIGQUIT:
 363                     goto done;
 364                 default:
 365                     break;
 366             }
 367         }
 368
 369         if (pth_event_occurred(ev)) {
 370             rc = assuan_process_next(cl->ctx);
 371
 372             if (rc) {
 373                 cl->inquire = INQUIRE_NONE;
 374
 375                 if (gpg_err_code(rc) == GPG_ERR_EOF)
 376                     goto done;
 377
 378                 log_write("assuan_process_next(): %s", gpg_strerror(rc));
 379                 rc = assuan_process_done(cl->ctx, rc);
 380
 381                 if (rc) {
 382                     log_write("assuan_process_done(): %s", gpg_strerror(rc));
 383                     goto done;
 384                 }
 385             }
 386             else {
 387                 /* Set from store_command_finalize(). */
 388                 if (cl->inquire == INQUIRE_OK || cl->inquire_error) {
 389                     cl->inquire = INQUIRE_NONE;
 390                     rc = assuan_process_done(cl->ctx, gpg_err_make(GPG_ERR_SOURCE_ANY, cl->inquire_error));
 391                     cl->inquire_error = 0;
 392
 393                     if (rc) {
 394                         log_write("assuan_process_done(): %s", gpg_strerror(rc));
 395                         goto done;
 396                     }
 397                 }
 398             }
 399         }
 400     }
 401
 402     /*
 403      * Client cleanup (including XML data) is done in remove_connection() from
 404      * the cleanup thread.
 405      */
 406 done:
 407     pth_event_free(ev, PTH_FREE_ALL);
 408
 409 fail:
 410     pth_exit(NULL);
 411     return NULL;
 412 }
 413
 414 /*
 415  * Make sure all settings are set to either the specified setting or a
 416  * default.
 417  */
 418 static void set_rcfile_defaults(GKeyFile *kf)
 419 {
 420     gchar buf[PATH_MAX];
 421
 422     if (g_key_file_has_key(kf, "default", "socket_path", NULL) == FALSE) {
 423         snprintf(buf, sizeof(buf), "~/.pwmd/socket");
 424         g_key_file_set_string(kf, "default", "socket_path", buf);
 425     }
 426
 427     if (g_key_file_has_key(kf, "default", "data_directory", NULL) == FALSE) {
 428         snprintf(buf, sizeof(buf), "~/.pwmd/data");
 429         g_key_file_set_string(kf, "default", "data_directory", buf);
 430     }
 431
 432     if (g_key_file_has_key(kf, "default", "log_path", NULL) == FALSE) {
 433         snprintf(buf, sizeof(buf), "~/.pwmd/log");
 434         g_key_file_set_string(kf, "default", "log_path", buf);
 435     }
 436
 437     if (g_key_file_has_key(kf, "default", "enable_logging", NULL) == FALSE)
 438         g_key_file_set_boolean(kf, "default", "enable_logging", FALSE);
 439
 440     if (g_key_file_has_key(kf, "default", "cache_size", NULL) == FALSE)
 441         g_key_file_set_integer(kf, "default", "cache_size", cache_size);
 442
 443 #ifdef HAVE_MLOCKALL
 444     if (g_key_file_has_key(kf, "default", "disable_mlockall", NULL) == FALSE)
 445         g_key_file_set_boolean(kf, "default", "disable_mlockall", TRUE);
 446 #endif
 447
 448     if (g_key_file_has_key(kf, "default", "cache_timeout", NULL) == FALSE)
 449         g_key_file_set_integer(kf, "default", "cache_timeout", -1);
 450
 451     if (g_key_file_has_key(kf, "default", "iterations", NULL) == FALSE)
 452         g_key_file_set_integer(kf, "default", "iterations", 0);
 453
 454     if (g_key_file_has_key(kf, "default", "disable_list_and_dump", NULL) == FALSE)
 455         g_key_file_set_boolean(kf, "default", "disable_list_and_dump", FALSE);
 456
 457     if (g_key_file_has_key(kf, "default", "iteration_progress", NULL) == FALSE)
 458         g_key_file_set_integer(kf, "default", "iteration_progress", 0);
 459
 460     if (g_key_file_has_key(kf, "default", "compression_level", NULL) == FALSE)
 461         g_key_file_set_integer(kf, "default", "compression_level", 6);
 462
 463     if (g_key_file_has_key(kf, "default", "recursion_depth", NULL) == FALSE)
 464         g_key_file_set_integer(kf, "default", "recursion_depth", DEFAULT_RECURSION_DEPTH);
 465
 466     if (g_key_file_has_key(kf, "default", "zlib_bufsize", NULL) == FALSE)
 467         g_key_file_set_integer(kf, "default", "zlib_bufsize", DEFAULT_ZLIB_BUFSIZE);
 468
 469     zlib_bufsize = g_key_file_get_integer(kf, "default", "zlib_bufsize", NULL);
 470
 471     max_recursion_depth = g_key_file_get_integer(kf, "default", "recursion_depth", NULL);
 472     disable_list_and_dump = g_key_file_get_boolean(kf, "default", "disable_list_and_dump", NULL);
 473
 474 #ifdef HAVE_MLOCKALL
 475     disable_mlock = g_key_file_get_boolean(kf, "default", "disable_mlockall", NULL);
 476 #endif
 477
 478     if (g_key_file_has_key(kf, "default", "syslog", NULL) == FALSE)
 479         g_key_file_set_boolean(kf, "default", "syslog", FALSE);
 480
 481     if (g_key_file_has_key(kf, "default", "keepalive", NULL) == FALSE)
 482         g_key_file_set_integer(kf, "default", "keepalive", 5);
 483 }
 484
 485 static GKeyFile *parse_rcfile(int cmdline)
 486 {
 487     GKeyFile *kf = g_key_file_new();
 488     GError *error = NULL;
 489
 490     if (g_key_file_load_from_file(kf, rcfile, G_KEY_FILE_NONE, &error) == FALSE) {
 491         log_write("%s: %s", rcfile, error->message);
 492
 493         if (cmdline)
 494             exit(EXIT_FAILURE);
 495
 496         if (error->code == G_FILE_ERROR_NOENT) {
 497             g_clear_error(&error);
 498             set_rcfile_defaults(kf);
 499             return kf;
 500         }
 501
 502         g_clear_error(&error);
 503         return NULL;
 504     }
 505     else
 506         set_rcfile_defaults(kf);
 507
 508     return kf;
 509 }
 510
 511 static gchar *get_password(const gchar *prompt)
 512 {
 513     gchar buf[LINE_MAX], *p;
 514     struct termios told, tnew;
 515     gchar *key;
 516
 517     if (tcgetattr(STDIN_FILENO, &told) == -1)
 518         err(EXIT_FAILURE, "tcgetattr()");
 519
 520     memcpy(&tnew, &told, sizeof(struct termios));
 521     tnew.c_lflag &= ~(ECHO);
 522     tnew.c_lflag |= ICANON|ECHONL;
 523
 524     if (tcsetattr(STDIN_FILENO, TCSANOW, &tnew) == -1) {
 525         tcsetattr(STDIN_FILENO, TCSANOW, &told);
 526         err(EXIT_FAILURE, "tcsetattr()");
 527     }
 528
 529     fprintf(stderr, "%s", prompt);
 530
 531     if ((p = fgets(buf, sizeof(buf), stdin)) == NULL) {
 532         tcsetattr(STDIN_FILENO, TCSANOW, &told);
 533         return NULL;
 534     }
 535
 536     tcsetattr(STDIN_FILENO, TCSANOW, &told);
 537     p[strlen(p) - 1] = 0;
 538
 539     if (!p || !*p)
 540         return NULL;
 541
 542     key = gcry_malloc(strlen(p) + 1);
 543     sprintf(key, "%s", p);
 544     memset(&buf, 0, sizeof(buf));
 545     return key;
 546 }
 547
 548 static gboolean do_try_xml_decrypt(const gchar *filename, guchar *key)
 549 {
 550     int fd;
 551     struct stat st;
 552     gpg_error_t error;
 553
 554     if ((fd = open_file(filename, &st)) == -1) {
 555         warn("%s", filename);
 556         return FALSE;
 557     }
 558
 559     if (st.st_size == 0) {
 560         warnx(N_("%s: skipping empty file"), filename);
 561         close(fd);
 562         return FALSE;
 563     }
 564
 565     error = try_xml_decrypt(NULL, fd, st, key);
 566     close(fd);
 567     return error ? FALSE : TRUE;
 568 }
 569
 570 static gboolean get_input(const gchar *filename, guchar *key)
 571 {
 572     gint try = 0;
 573     gchar *password;
 574     gchar *prompt;
 575
 576     prompt = g_strdup_printf(N_("Password for '%s': "), filename);
 577
 578 again:
 579     if ((password = get_password(prompt)) == NULL) {
 580         warnx(N_("%s: skipping file"), filename);
 581         g_free(prompt);
 582         return FALSE;
 583     }
 584
 585     gcry_md_hash_buffer(GCRY_MD_SHA256, key, password, strlen(password));
 586     gcry_free(password);
 587
 588     if (do_try_xml_decrypt(filename, key) == FALSE) {
 589         if (try++ == 2) {
 590             warnx(N_("%s: invalid password, skipping"), filename);
 591             g_free(prompt);
 592             return FALSE;
 593         }
 594         else {
 595             warnx(N_("%s: invalid password"), filename);
 596             goto again;
 597         }
 598     }
 599
 600     g_free(prompt);
 601     return TRUE;
 602 }
 603
 604 static gboolean xml_import(const gchar *filename, gint iter)
 605 {
 606     xmlDocPtr doc;
 607     gint fd;
 608     struct stat st;
 609     gint len;
 610     xmlChar *xmlbuf;
 611     xmlChar *xml;
 612     gchar *key = NULL;
 613     gchar *key2 = NULL;
 614     guchar shakey[gcrykeysize];
 615     gcry_cipher_hd_t gh;
 616     gpg_error_t error;
 617     gint level;
 618     glong outsize;
 619     gpointer outbuf;
 620     gint zerror;
 621
 622     if (stat(filename, &st) == -1) {
 623         warn("%s", filename);
 624         return FALSE;
 625     }
 626
 627     if ((gcryerrno = gcry_cipher_open(&gh, GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_CBC, 0))) {
 628         send_error(NULL, gcryerrno);
 629         gcry_cipher_close(gh);
 630         log_write("%s(%i): %s", __FUNCTION__, __LINE__, gcry_strerror(gcryerrno));
 631         return FALSE;
 632     }
 633
 634     if ((key = get_password(N_("New password: "))) == NULL) {
 635         fprintf(stderr, "%s\n", N_("Invalid password."));
 636         gcry_cipher_close(gh);
 637         return FALSE;
 638     }
 639
 640     if ((key2 = get_password(N_("Verify password: "))) == NULL) {
 641         fprintf(stderr, "%s\n", N_("Passwords do not match."));
 642         gcry_free(key);
 643         gcry_cipher_close(gh);
 644         return FALSE;
 645     }
 646
 647     if (g_utf8_collate(key, key2) != 0) {
 648         fprintf(stderr, "%s\n", N_("Passwords do not match."));
 649         gcry_free(key);
 650         gcry_free(key2);
 651         gcry_cipher_close(gh);
 652         return FALSE;
 653     }
 654
 655     gcry_free(key2);
 656
 657     if ((fd = open(filename, O_RDONLY)) == -1) {
 658         gcry_free(key);
 659         warn("%s", filename);
 660         gcry_cipher_close(gh);
 661         return FALSE;
 662     }
 663
 664     if ((xmlbuf = gcry_malloc(st.st_size+1)) == NULL) {
 665         gcry_free(key);
 666         close(fd);
 667         log_write("%s", strerror(ENOMEM));
 668         gcry_cipher_close(gh);
 669         return FALSE;
 670     }
 671
 672     if (read(fd, xmlbuf, st.st_size) == -1) {
 673         error = errno;
 674         close(fd);
 675         gcry_free(key);
 676         gcry_cipher_close(gh);
 677         errno = error;
 678         err(EXIT_FAILURE, "read()");
 679     }
 680
 681     close(fd);
 682     xmlbuf[st.st_size] = 0;
 683
 684     /*
 685      * Make sure the document validates.
 686      */
 687     if ((doc = xmlReadDoc(xmlbuf, NULL, "UTF-8", XML_PARSE_NOBLANKS)) == NULL) {
 688         log_write("xmlReadDoc()");
 689         close(fd);
 690         gcry_free(key);
 691         gcry_free(xmlbuf);
 692         gcry_cipher_close(gh);
 693         return FALSE;
 694     }
 695
 696     gcry_free(xmlbuf);
 697     xmlDocDumpMemory(doc, &xml, &len);
 698     xmlFreeDoc(doc);
 699
 700     level = get_key_file_integer(filename, "compression_level");
 701
 702     if (level < 0)
 703         level = 0;
 704
 705     if (do_compress(NULL, level, xml, len, &outbuf, &outsize, &zerror) == FALSE) {
 706         memset(shakey, 0, sizeof(shakey));
 707         gcry_free(xml);
 708
 709         if (zerror == Z_MEM_ERROR)
 710             warnx("%s", strerror(ENOMEM));
 711         else
 712             warnx("do_compress() failed");
 713
 714         gcry_cipher_close(gh);
 715         return FALSE;
 716     }
 717     else {
 718         gcry_free(xml);
 719         xml = outbuf;
 720         len = outsize;
 721     }
 722
 723     gcry_md_hash_buffer(GCRY_MD_SHA256, shakey, key, strlen(key));
 724     gcry_free(key);
 725     error = do_xml_encrypt(NULL, gh, NULL, xml, len, shakey, iter);
 726     gcry_cipher_close(gh);
 727
 728     if (error) {
 729         memset(shakey, 0, sizeof(shakey));
 730         warnx("%s", gpg_strerror(error));
 731         return FALSE;
 732     }
 733
 734     memset(shakey, 0, sizeof(shakey));
 735     return TRUE;
 736 }
 737
 738 gchar *get_key_file_string(const gchar *section, const gchar *what)
 739 {
 740     gchar *val = NULL;
 741     GError *gerror = NULL;
 742
 743     if (g_key_file_has_key(keyfileh, section, what, NULL) == TRUE) {
 744         val = g_key_file_get_string(keyfileh, section, what, &gerror);
 745
 746         if (gerror) {
 747             log_write("%s(%i): %s", __FILE__, __LINE__, gerror->message);
 748             g_clear_error(&gerror);
 749         }
 750     }
 751     else {
 752         if (g_key_file_has_key(keyfileh, "default", what, NULL) == TRUE) {
 753             val = g_key_file_get_string(keyfileh, "default", what, &gerror);
 754
 755             if (gerror) {
 756                 log_write("%s(%i): %s", __FILE__, __LINE__, gerror->message);
 757                 g_clear_error(&gerror);
 758             }
 759         }
 760     }
 761
 762     return val;
 763 }
 764
 765 gint get_key_file_integer(const gchar *section, const gchar *what)
 766 {
 767     gint val = -1;
 768     GError *gerror = NULL;
 769
 770     if (g_key_file_has_key(keyfileh, section, what, NULL) == TRUE) {
 771         val = g_key_file_get_integer(keyfileh, section, what, &gerror);
 772
 773         if (gerror) {
 774             log_write("%s(%i): %s", __FILE__, __LINE__, gerror->message);
 775             g_clear_error(&gerror);
 776         }
 777     }
 778     else {
 779         if (g_key_file_has_key(keyfileh, "default", what, NULL) == TRUE) {
 780             val = g_key_file_get_integer(keyfileh, "default", what, &gerror);
 781
 782             if (gerror) {
 783                 log_write("%s(%i): %s", __FILE__, __LINE__, gerror->message);
 784                 g_clear_error(&gerror);
 785             }
 786         }
 787     }
 788
 789     return val;
 790 }
 791
 792 gboolean get_key_file_boolean(const gchar *section, const gchar *what)
 793 {
 794     gboolean val = FALSE;
 795     GError *gerror = NULL;
 796
 797     if (g_key_file_has_key(keyfileh, section, what, NULL) == TRUE) {
 798         val = g_key_file_get_boolean(keyfileh, section, what, &gerror);
 799
 800         if (gerror) {
 801             log_write("%s(%i): %s", __FILE__, __LINE__, gerror->message);
 802             g_clear_error(&gerror);
 803         }
 804     }
 805     else {
 806         if (g_key_file_has_key(keyfileh, "default", what, NULL) == TRUE) {
 807             val = g_key_file_get_boolean(keyfileh, "default", what, &gerror);
 808
 809             if (gerror) {
 810                 log_write("%s(%i): %s", __FILE__, __LINE__, gerror->message);
 811                 g_clear_error(&gerror);
 812             }
 813         }
 814     }
 815
 816     return val;
 817 }
 818
 819 gchar *expand_homedir(gchar *str)
 820 {
 821     gchar *p = str;
 822
 823     if (*p++ == '~')
 824         return g_strdup_printf("%s%s", g_get_home_dir(), p);
 825
 826     return g_strdup(str);
 827 }
 828
 829 static gchar *_getline(const gchar *file)
 830 {
 831     FILE *fp;
 832     gchar buf[LINE_MAX], *p;
 833     gchar *str = NULL;
 834
 835     if ((fp = fopen(file, "r")) == NULL) {
 836         warn("%s", file);
 837         return NULL;
 838     }
 839
 840     if ((p = fgets(buf, sizeof(buf), fp)) == NULL) {
 841         warnx(N_("%s: empty file?"), file);
 842         return NULL;
 843     }
 844
 845     fclose(fp);
 846
 847     if (buf[strlen(buf) - 1] == '\n')
 848         buf[strlen(buf) - 1] = 0;
 849
 850     str = gcry_malloc(strlen(p) + 1);
 851     memcpy(str, p, strlen(p));
 852     str[strlen(p)] = 0;
 853     memset(&buf, 0, sizeof(buf));
 854     return str;
 855 }
 856
 857 static gboolean parse_keyfile_key()
 858 {
 859     gsize n;
 860     gchar **groups;
 861     gchar **p;
 862     gchar *str;
 863
 864     groups = g_key_file_get_groups(keyfileh, &n);
 865
 866     for (p = groups; *p; p++) {
 867         GError *error = NULL;
 868
 869         if (g_key_file_has_key(keyfileh, *p, "key", &error) == TRUE) {
 870             str = g_key_file_get_string(keyfileh, *p, "key", &error);
 871
 872             if (!str) {
 873                 if (error) {
 874                     warnx("%s", error->message);
 875                     g_clear_error(&error);
 876                 }
 877
 878                 continue;
 879             }
 880
 881             do_cache_push(*p, str);
 882             g_free(str);
 883             continue;
 884         }
 885
 886         if (error) {
 887             warnx("%s", error->message);
 888             g_clear_error(&error);
 889             continue;
 890         }
 891
 892         if (g_key_file_has_key(keyfileh, *p, "key_file", &error) == TRUE) {
 893             gchar *t;
 894             gchar *file = g_key_file_get_string(keyfileh, *p, "key_file", &error);
 895
 896             if (!file) {
 897                 if (error) {
 898                     warnx("%s", error->message);
 899                     g_clear_error(&error);
 900                 }
 901
 902                 continue;
 903             }
 904
 905             t = expand_homedir(file);
 906             g_free(file);
 907             file = t;
 908
 909             if ((str = _getline(file)) == NULL) {
 910                 g_free(file);
 911                 continue;
 912             }
 913
 914             g_free(file);
 915             do_cache_push(*p, str);
 916             gcry_free(str);
 917             continue;
 918         }
 919
 920         if (error) {
 921             warnx("%s", error->message);
 922             g_clear_error(&error);
 923         }
 924     }
 925
 926     g_strfreev(groups);
 927     return TRUE;
 928 }
 929
 930 static gboolean do_cache_push(const gchar *filename, const gchar *password)
 931 {
 932     guchar *md5file;
 933     guchar *key;
 934     gint timeout;
 935     const gchar *p = filename;
 936
 937     while (isspace(*p))
 938         p++;
 939
 940     if (!*p)
 941         return FALSE;
 942
 943     if (valid_filename(p) == FALSE) {
 944         warnx(N_("%s: invalid characters in filename"), p);
 945         return FALSE;
 946     }
 947
 948     md5file = gcry_malloc(16);
 949     key = gcry_malloc(gcrykeysize);
 950     gcry_md_hash_buffer(GCRY_MD_MD5, md5file, p, strlen(p));
 951
 952     if (cache_iscached(md5file) == TRUE) {
 953         warnx(N_("%s: file already cached, skipping"), p);
 954         gcry_free(md5file);
 955         gcry_free(key);
 956         return FALSE;
 957     }
 958
 959     if (access(p, R_OK|W_OK) != 0) {
 960         gcry_free(md5file);
 961         gcry_free(key);
 962
 963         if (errno != ENOENT) {
 964             warn("%s", p);
 965             return FALSE;
 966         }
 967
 968         warn("%s", p);
 969         return TRUE;
 970     }
 971
 972     if (!password) {
 973         if (get_input(p, key) == FALSE) {
 974             gcry_free(key);
 975             gcry_free(md5file);
 976             return FALSE;
 977         }
 978     }
 979     else {
 980         gcry_md_hash_buffer(GCRY_MD_SHA256, key, password, strlen(password));
 981
 982         if (do_try_xml_decrypt(filename, key) == FALSE) {
 983             warnx(N_("%s: invalid password, skipping"), filename);
 984             gcry_free(key);
 985             gcry_free(md5file);
 986             return FALSE;
 987         }
 988     }
 989
 990     if (cache_add_file(md5file, key) == FALSE) {
 991         warnx("%s: %s", p, pwmd_strerror(EPWMD_MAX_SLOTS));
 992         gcry_free(key);
 993         gcry_free(md5file);
 994         return FALSE;
 995     }
 996
 997     timeout = get_key_file_integer(p, "cache_timeout");
 998     cache_set_timeout(md5file, timeout);
 999     warnx(N_("%s: file added to the cache"), filename);
1000     gcry_free(key);
1001     gcry_free(md5file);
1002     return TRUE;
1003 }
1004
1005 static GSList *remove_connection(GSList *list, struct client_thread_s *cn)
1006 {
1007     gpointer value;
1008     struct client_s *cl = cn->cl;
1009
1010     if (cn->keepalive_tid) {
1011         pth_raise(cn->keepalive_tid, SIGALRM);
1012         pth_join(cn->keepalive_tid, &value);
1013     }
1014
1015     pth_join(cn->tid, &value);
1016     close(cn->fd);
1017
1018     if (cl->freed == FALSE)
1019         cleanup_assuan(cl->ctx);
1020
1021     if (cl->ctx)
1022         assuan_deinit_server(cl->ctx);
1023
1024     if (cl)
1025         g_free(cl);
1026
1027     pth_event_isolate(cn->ev);
1028     pth_event_free(cn->ev, PTH_FREE_THIS);
1029     log_write(N_("client exited: fd=%i"), cn->fd);
1030     list = g_slist_remove(list, cn);
1031     g_free(cn);
1032     return list;
1033 }
1034
1035 /*
1036  * Can't pth_event_concat() to an empty event.
1037  */
1038 static int event_ring_hack(void *data)
1039 {
1040     return FALSE;
1041 }
1042
1043 /*
1044  * See if any thread has entered the DEAD queue and remove it.
1045  */
1046 static GSList *cleanup_dead_queue(GSList *threads, pth_event_t tid_events)
1047 {
1048     guint n, i;
1049
1050     for (n = g_slist_length(threads), i = 0; i < n; i++) {
1051         struct client_thread_s *cn = g_slist_nth_data(threads, i);
1052
1053         if (pth_event_occurred(cn->ev)) {
1054             threads = remove_connection(threads, cn);
1055             return cleanup_dead_queue(threads, tid_events);
1056         }
1057
1058         pth_event_concat(tid_events, cn->ev, NULL);
1059     }
1060
1061     return threads;
1062 }
1063
1064 static void *socket_thread(void *arg)
1065 {
1066     gint sockfd = (gint)arg;
1067     pth_attr_t attr;
1068
1069     /*
1070      * Thread priority is inherited from the calling thread. This thread is
1071      * PTH_PRIO_MAX. Keep the "child" threads at standard priority.
1072      */
1073     attr = pth_attr_new();
1074     pth_attr_set(attr, PTH_ATTR_PRIO, PTH_PRIO_STD);
1075
1076     for (;;) {
1077         socklen_t slen = sizeof(struct sockaddr_un);
1078         struct sockaddr_un raddr;
1079         gint fd = -1;
1080
1081         if ((fd = pth_accept(sockfd, (struct sockaddr *)&raddr, &slen)) == -1) {
1082             if (errno != EAGAIN) {
1083                 if (!quit) // probably EBADF
1084                     log_write("accept(): %s", strerror(errno));
1085
1086                 break;
1087             }
1088         }
1089
1090         if (fd >= 0) {
1091             pth_t tid;
1092             struct client_thread_s *new;
1093
1094             new = g_malloc0(sizeof(struct client_thread_s));
1095
1096             if (!new) {
1097                 log_write("%s", strerror(ENOMEM));
1098                 continue;
1099             }
1100
1101             log_write(N_("new connection: fd=%i"), fd);
1102             new->fd = fd;
1103             tid = pth_spawn(attr, client_thread, new);
1104
1105             if (!tid) {
1106                 g_free(new);
1107                 log_write(N_("pth_spawn() failed"));
1108                 continue;
1109             }
1110
1111             new->tid = tid;
1112             new->fd = fd;
1113             new->ev = pth_event(PTH_EVENT_TID|PTH_UNTIL_TID_DEAD, tid);
1114             pth_mutex_acquire(&cn_mutex, FALSE, NULL);
1115             pth_event_concat(cn_events, new->ev, NULL);
1116             cn_thread_list = g_slist_append(cn_thread_list, new);
1117             pth_mutex_release(&cn_mutex);
1118         }
1119     }
1120
1121     pth_attr_destroy(attr);
1122
1123     /* Just in case pth_accept() failed for some reason other than EBADF */
1124     quit = 1;
1125     pth_exit(PTH_CANCELED);
1126     return NULL;
1127 }
1128
1129 static void *cleanup_thread(void *arg)
1130 {
1131     cn_events = pth_event(PTH_EVENT_TIME, pth_timeout(0, 500000));
1132
1133     for (;;) {
1134         if (pth_wait(cn_events) && pth_event_occurred(cn_events)) {
1135             pth_mutex_acquire(&cn_mutex, FALSE, NULL);
1136             pth_event_isolate(cn_events);
1137             pth_event_free(cn_events, PTH_FREE_THIS);
1138             cn_events = pth_event(PTH_EVENT_TIME, pth_timeout(0, 500000));
1139             cn_thread_list = cleanup_dead_queue(cn_thread_list, cn_events);
1140             pth_mutex_release(&cn_mutex);
1141         }
1142     }
1143
1144     pth_event_isolate(cn_events);
1145     pth_event_free(cn_events, PTH_FREE_THIS);
1146     return NULL;
1147 }
1148
1149 static void *adjust_cache_time_thread(void *arg)
1150 {
1151     CACHE_LOCK(NULL, NULL);
1152     cache_adjust_timer();
1153     CACHE_UNLOCK;
1154     return NULL;
1155 }
1156
1157 static void server_loop(int sockfd)
1158 {
1159     pth_t socket_tid, cleanup_tid;
1160     guint n, i;
1161     sigset_t set;
1162     gint n_clients = 0;
1163     pth_attr_t attr;
1164     pth_event_t timeout_event;
1165     gpointer value;
1166
1167     pth_mutex_init(&cn_mutex);
1168     log_write(N_("%s started for user %s"), PACKAGE_STRING, g_get_user_name());
1169
1170     sigemptyset(&set);
1171     sigaddset(&set, SIGTERM);
1172     sigaddset(&set, SIGINT);
1173     sigaddset(&set, SIGUSR1);
1174     sigaddset(&set, SIGHUP);
1175     sigaddset(&set, SIGABRT);
1176
1177     attr = pth_attr_new();
1178     pth_attr_init(attr);
1179     pth_attr_set(attr, PTH_ATTR_PRIO, PTH_PRIO_MAX);
1180     socket_tid = pth_spawn(attr, socket_thread, (void *)sockfd);
1181     pth_attr_set(attr, PTH_ATTR_JOINABLE, FALSE);
1182     pth_attr_set(attr, PTH_ATTR_CANCEL_STATE, PTH_CANCEL_ASYNCHRONOUS);
1183     cleanup_tid = pth_spawn(attr, cleanup_thread, NULL);
1184
1185     /*
1186      * For the cache_timeout configuration parameter. This replaces the old
1187      * SIGALRM stuff and is safer.
1188      */
1189     timeout_event = pth_event(PTH_EVENT_TIME, pth_timeout(1, 0));
1190     pth_attr_init(attr);
1191     pth_attr_set(attr, PTH_ATTR_JOINABLE, FALSE);
1192     pth_attr_set(attr, PTH_ATTR_PRIO, PTH_PRIO_MAX);
1193
1194     do {
1195         gint sig = 0;
1196
1197         pth_sigwait_ev(&set, &sig, timeout_event);
1198
1199         if (pth_event_occurred(timeout_event)) {
1200             /*
1201              * The timer event has expired. Update the file cache. When the
1202              * cache mutex is locked and the timer expires again, the threads
1203              * will stack.
1204              */
1205             pth_spawn(attr, adjust_cache_time_thread, NULL);
1206             pth_event_free(timeout_event, PTH_FREE_THIS);
1207             timeout_event = pth_event(PTH_EVENT_TIME, pth_timeout(1, 0));
1208         }
1209
1210         if (sig > 0) {
1211             log_write(N_("caught signal %i (%s)"), sig, strsignal(sig));
1212
1213             /* Caught a signal. */
1214             switch (sig) {
1215                 case SIGUSR1:
1216                     reload_rcfile();
1217                     break;
1218                 case SIGABRT:
1219                     CACHE_LOCK(NULL, NULL);
1220                     cache_clear(NULL, 2);
1221                     CACHE_UNLOCK;
1222 #ifndef MEM_DEBUG
1223                     xpanic();
1224 #endif
1225                     exit(EXIT_FAILURE);
1226                 case SIGHUP:
1227                     CACHE_LOCK(NULL, NULL);
1228                     log_write(N_("clearing file cache"));
1229                     cache_clear(NULL, 2);
1230                     CACHE_UNLOCK;
1231                     break;
1232                 default:
1233                     quit = 1;
1234                     shutdown(sockfd, SHUT_RDWR);
1235                     close(sockfd);
1236                     break;
1237             }
1238         }
1239     } while (!quit);
1240
1241     /*
1242      * We're out of the main server loop. This happens when a signal was sent
1243      * to terminate the daemon. We'll wait for all clients to disconnect
1244      * before exiting and ignore any following signals.
1245      */
1246     pth_join(socket_tid, &value);
1247     pth_attr_destroy(attr);
1248     pth_event_free(timeout_event, PTH_FREE_THIS);
1249
1250     n = pth_ctrl(PTH_CTRL_GETTHREADS);
1251
1252     /* 2 because the cleanup thread still exists, plus self. */
1253     if (n > 2)
1254         log_write(N_("waiting for all threads to terminate"));
1255
1256     while (n > 2) {
1257         gint t;
1258         pth_event_t events;
1259
1260         if (n != n_clients) {
1261             log_write(N_("%i threads remain"), n-2);
1262             n_clients = n;
1263         }
1264
1265         events = pth_event(PTH_EVENT_FUNC, event_ring_hack, NULL, pth_timeout(1, 0));
1266         pth_mutex_acquire(&cn_mutex, FALSE, NULL);
1267
1268         for (t = g_slist_length(cn_thread_list), i = 0; i < t; i++) {
1269             struct client_thread_s *cn = g_slist_nth_data(cn_thread_list, i);
1270
1271             pth_event_concat(events, cn->ev, NULL);
1272         }
1273
1274         if (!t)
1275             goto done;
1276
1277         pth_mutex_release(&cn_mutex);
1278         pth_wait(events);
1279         pth_yield(cleanup_tid);
1280 done:
1281         pth_event_isolate(events);
1282         pth_event_free(events, PTH_FREE_THIS);
1283         n = pth_ctrl(PTH_CTRL_GETTHREADS);
1284     }
1285
1286     pth_cancel(cleanup_tid);
1287 }
1288
1289 int main(int argc, char *argv[])
1290 {
1291     gint opt;
1292     struct sockaddr_un addr;
1293     struct passwd *pw = getpwuid(getuid());
1294     gchar buf[PATH_MAX];
1295     gchar *socketpath = NULL, *socketdir, *socketname = NULL;
1296     gchar *socketarg = NULL;
1297     gchar *datadir = NULL;
1298     gboolean n;
1299     gchar *p;
1300     gchar **cache_push = NULL;
1301     gint iter = 0;
1302     gchar *import = NULL;
1303     gint default_timeout;
1304     gint rcfile_spec = 0;
1305     gint estatus = EXIT_FAILURE;
1306     gint sockfd;
1307 #ifndef MEM_DEBUG
1308     GMemVTable mtable = { xmalloc, xrealloc, xfree, xcalloc, NULL, NULL };
1309 #endif
1310     gint do_unlink = 1;
1311     gboolean secure = FALSE;
1312     guint ptotal = 0;
1313     gint background = 0;
1314     sigset_t set;
1315 #ifndef DEBUG
1316 #ifdef HAVE_SETRLIMIT
1317     struct rlimit rl;
1318
1319     rl.rlim_cur = rl.rlim_max = 0;
1320
1321     if (setrlimit(RLIMIT_CORE, &rl) != 0)
1322         err(EXIT_FAILURE, "setrlimit()");
1323 #endif
1324 #endif
1325
1326 #ifdef ENABLE_NLS
1327     setlocale(LC_ALL, "");
1328     bindtextdomain("pwmd", LOCALEDIR);
1329     textdomain("pwmd");
1330 #endif
1331
1332     gpg_err_init();
1333     assuan_set_assuan_err_source(GPG_ERR_SOURCE_DEFAULT);
1334 #ifndef MEM_DEBUG
1335     g_mem_set_vtable(&mtable);
1336     assuan_set_malloc_hooks(xmalloc, xrealloc, xfree);
1337     xmlMemSetup(xfree, xmalloc, xrealloc, xstrdup);
1338     xmlInitMemory();
1339 #endif
1340     pth_init();
1341     snprintf(buf, sizeof(buf), "%s/.pwmd", pw->pw_dir);
1342
1343     if (mkdir(buf, 0700) == -1 && errno != EEXIST)
1344         err(EXIT_FAILURE, "%s", buf);
1345
1346     snprintf(buf, sizeof(buf), "%s/.pwmd/data", pw->pw_dir);
1347
1348     if (mkdir(buf, 0700) == -1 && errno != EEXIST)
1349         err(EXIT_FAILURE, "%s", buf);
1350
1351     rcfile = g_strdup_printf("%s/.pwmd/config", pw->pw_dir);
1352
1353     if ((page_size = sysconf(_SC_PAGESIZE)) == -1)
1354         err(EXIT_FAILURE, "sysconf()");
1355
1356     cache_size = page_size;
1357
1358     while ((opt = getopt(argc, argv, "bI:hvf:D")) != EOF) {
1359         switch (opt) {
1360             case 'b':
1361                 background = 1;
1362                 break;
1363             case 'D':
1364                 secure = TRUE;
1365                 break;
1366             case 'I':
1367                 import = optarg;
1368                 break;
1369             case 'f':
1370                 g_free(rcfile);
1371                 rcfile = g_strdup(optarg);
1372                 rcfile_spec = 1;
1373                 break;
1374             case 'v':
1375                 printf("%s\n%s\n", PACKAGE_STRING, PACKAGE_BUGREPORT);
1376                 exit(EXIT_SUCCESS);
1377             case 'h':
1378             default:
1379                 usage(argv[0]);
1380         }
1381     }
1382
1383     if ((keyfileh = parse_rcfile(rcfile_spec)) == NULL)
1384         exit(EXIT_FAILURE);
1385
1386     if (g_key_file_has_key(keyfileh, "default", "syslog", NULL) == TRUE)
1387         log_syslog = g_key_file_get_boolean(keyfileh, "default", "syslog", NULL);
1388
1389     if (log_syslog == TRUE)
1390         openlog("pwmd", LOG_NDELAY|LOG_PID, LOG_DAEMON);
1391
1392     if (g_key_file_has_key(keyfileh, "default", "iterations", NULL) == TRUE)
1393         iter = g_key_file_get_integer(keyfileh, "default", "iterations", NULL);
1394
1395 #ifdef HAVE_MLOCKALL
1396     if (disable_mlock == FALSE && mlockall(MCL_FUTURE) == -1) {
1397         warn("mlockall()");
1398         goto do_exit;
1399     }
1400 #endif
1401
1402     setup_gcrypt();
1403
1404     if (import) {
1405         opt = xml_import(import, iter);
1406         g_key_file_free(keyfileh);
1407         g_free(rcfile);
1408         exit(opt == FALSE ? EXIT_FAILURE : EXIT_SUCCESS);
1409     }
1410
1411     g_key_file_set_list_separator(keyfileh, ',');
1412
1413     if ((p = g_key_file_get_string(keyfileh, "default", "socket_path", NULL)) == NULL)
1414         errx(EXIT_FAILURE, N_("%s: socket_path not defined"), rcfile);
1415
1416     if (*p == '~') {
1417         p++;
1418         snprintf(buf, sizeof(buf), "%s%s", g_get_home_dir(), p--);
1419         g_free(p);
1420         socketarg = g_strdup(buf);
1421     }
1422     else
1423         socketarg = p;
1424
1425     if ((p = g_key_file_get_string(keyfileh, "default", "data_directory", NULL)) == NULL)
1426         errx(EXIT_FAILURE, N_("%s: data_directory not defined"), rcfile);
1427
1428     datadir = expand_homedir(p);
1429     g_free(p);
1430
1431     if (secure == FALSE && g_key_file_has_key(keyfileh, "default", "disable_list_and_dump", NULL) == TRUE) {
1432         n = g_key_file_get_boolean(keyfileh, "default", "disable_list_and_dump", NULL);
1433         disable_list_and_dump = n;
1434     }
1435     else
1436         disable_list_and_dump = secure;
1437
1438     if (g_key_file_has_key(keyfileh, "default", "cache_timeout", NULL) == TRUE)
1439         default_timeout = g_key_file_get_integer(keyfileh, "default", "cache_timeout", NULL);
1440     else
1441         default_timeout = -1;
1442
1443     if (g_key_file_has_key(keyfileh, "default", "cache_size", NULL) == TRUE) {
1444         cache_size = g_key_file_get_integer(keyfileh, "default", "cache_size", NULL);
1445
1446         if (cache_size < page_size || cache_size % page_size)
1447             errx(EXIT_FAILURE, N_("cache size must be in multiples of %li"), page_size);
1448     }
1449
1450     if (g_key_file_has_key(keyfileh, "default", "log_path", NULL) == TRUE) {
1451         if (g_key_file_has_key(keyfileh, "default", "enable_logging", NULL) == TRUE) {
1452             n = g_key_file_get_boolean(keyfileh, "default", "enable_logging", NULL);
1453
1454             if (n == TRUE) {
1455                 p = g_key_file_get_string(keyfileh, "default", "log_path", NULL);
1456
1457                 if (*p == '~') {
1458                     p++;
1459                     snprintf(buf, sizeof(buf), "%s%s", g_get_home_dir(), p--);
1460                     g_free(p);
1461                     logfile = g_strdup(buf);
1462                 }
1463                 else
1464                     logfile = p;
1465             }
1466         }
1467     }
1468
1469     if (g_key_file_has_key(keyfileh, "default", "cache_push", NULL) == TRUE)
1470         cache_push = g_key_file_get_string_list(keyfileh, "default", "cache_push", NULL, NULL);
1471
1472     if (argc != optind) {
1473         if (cache_push)
1474             ptotal = g_strv_length(cache_push);
1475
1476         for (; optind < argc; optind++) {
1477             if (strv_printf(&cache_push, "%s", argv[optind]) == FALSE)
1478                 errx(EXIT_FAILURE, "%s", strerror(ENOMEM));
1479         }
1480     }
1481
1482     if (strchr(socketarg, '/') == NULL) {
1483         socketdir = g_get_current_dir();
1484         socketname = g_strdup(socketarg);
1485         socketpath = g_strdup_printf("%s/%s", socketdir, socketname);
1486     }
1487     else {
1488         socketname = g_strdup(strrchr(socketarg, '/'));
1489         socketname++;
1490         socketarg[strlen(socketarg) - strlen(socketname) -1] = 0;
1491         socketdir = g_strdup(socketarg);
1492         socketpath = g_strdup_printf("%s/%s", socketdir, socketname);
1493     }
1494
1495     if ((key_cache = mmap(NULL, cache_size, PROT_READ|PROT_WRITE,
1496 #ifdef MMAP_ANONYMOUS
1497                     MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)) == MAP_FAILED) {
1498 #else
1499                     MAP_PRIVATE|MAP_ANON, -1, 0)) == MAP_FAILED) {
1500 #endif
1501         err(EXIT_FAILURE, "mmap()");
1502     }
1503
1504     if (mlock(key_cache, cache_size) == -1)
1505         warn("mlock()");
1506
1507     memset(key_cache, 0, cache_size);
1508
1509     if (chdir(datadir)) {
1510         warn("%s", datadir);
1511         unlink(socketpath);
1512         goto do_exit;
1513     }
1514
1515     if (parse_keyfile_key() == FALSE)
1516         goto do_exit;
1517
1518     clear_rcfile_key();
1519
1520     /*
1521      * Set the cache entry for a file. Prompts for the password.
1522      */
1523     if (cache_push) {
1524         for (opt = 0; cache_push[opt]; opt++)
1525             do_cache_push(cache_push[opt], NULL);
1526
1527         g_strfreev(cache_push);
1528         warnx(background ? N_("Done. Daemonizing...") : N_("Done. Waiting for connections..."));
1529     }
1530
1531     /*
1532      * bind() doesn't like the full pathname of the socket or any non alphanum
1533      * characters so change to the directory where the socket is wanted then
1534      * create it then change to datadir.
1535      */
1536     if (chdir(socketdir)) {
1537         warn("%s", socketdir);
1538         goto do_exit;
1539     }
1540
1541     g_free(socketdir);
1542
1543     if ((sockfd = socket(PF_UNIX, SOCK_STREAM, 0)) == -1) {
1544         warn("socket()");
1545         goto do_exit;
1546     }
1547
1548     addr.sun_family = AF_UNIX;
1549     snprintf(addr.sun_path, sizeof(addr.sun_path), "%s", socketname);
1550
1551     if (bind(sockfd, (struct sockaddr *)&addr, sizeof(struct sockaddr)) == -1) {
1552         warn("bind()");
1553
1554         if (errno == EADDRINUSE)
1555             warnx(N_("Either there is another pwmd running or '%s' is a \n"
1556                     "stale socket. Please remove it manually."), socketpath);
1557
1558         do_unlink = 0;
1559         goto do_exit;
1560     }
1561
1562     if (g_key_file_has_key(keyfileh, "default", "socket_perms", NULL) == TRUE) {
1563         gchar *t = g_key_file_get_string(keyfileh, "default", "socket_perms", NULL);
1564         mode_t mode = strtol(t, NULL, 8);
1565         mode_t mask = umask(0);
1566
1567         g_free(t);
1568
1569         if (chmod(socketname, mode) == -1) {
1570             warn("%s", socketname);
1571             close(sockfd);
1572             unlink(socketpath);
1573             umask(mask);
1574             goto do_exit;
1575         }
1576
1577         umask(mask);
1578     }
1579
1580     g_free(--socketname);
1581
1582     if (chdir(datadir)) {
1583         warn("%s", datadir);
1584         close(sockfd);
1585         unlink(socketpath);
1586         goto do_exit;
1587     }
1588
1589     g_free(datadir);
1590     pth_mutex_init(&cache_mutex);
1591
1592     if (listen(sockfd, 0) == -1) {
1593         warn("listen()");
1594         goto do_exit;
1595     }
1596
1597     if (background) {
1598         switch (fork()) {
1599             case -1:
1600                 warn("fork()");
1601                 goto do_exit;
1602             case 0:
1603                 close(0);
1604                 close(1);
1605                 close(2);
1606                 setsid();
1607                 break;
1608             default:
1609                 exit(EXIT_SUCCESS);
1610         }
1611     }
1612
1613     /*
1614      * These are the signals that we use in threads. libpth can catch signals
1615      * itself so ignore them everywhere else. Note that using
1616      * signal(N, SIG_IGN) doesn't work like you might think.
1617      */
1618     sigemptyset(&set);
1619
1620     /* Termination */
1621     sigaddset(&set, SIGTERM);
1622     sigaddset(&set, SIGINT);
1623
1624     /* Configuration file reloading. */
1625     sigaddset(&set, SIGUSR1);
1626
1627     /* Clears the file cache. */
1628     sigaddset(&set, SIGHUP);
1629
1630     /* Caught in client_thread(). Sends a cache status message. */
1631     sigaddset(&set, SIGUSR2);
1632
1633     /* Caught in client_thread(). When keepalive_thread() fails, this signal
1634      * is raised to terminate the client. More of a failsafe than anything. */
1635     sigaddset(&set, SIGQUIT);
1636
1637     /* Ignored everywhere. When a client disconnects abnormally this signal
1638      * gets raised. It isn't needed though because client_thread() will check
1639      * for errors even after the client disconnects. */
1640     sigaddset(&set, SIGPIPE);
1641     pth_sigmask(SIG_BLOCK, &set, NULL);
1642     server_loop(sockfd);
1643     estatus = EXIT_SUCCESS;
1644
1645 do_exit:
1646     if (socketpath && do_unlink) {
1647         unlink(socketpath);
1648         g_free(socketpath);
1649     }
1650
1651     g_key_file_free(keyfileh);
1652     g_free(rcfile);
1653
1654     if (key_cache)
1655         memset(key_cache, 0, cache_size);
1656
1657     if (key_cache && munmap(key_cache, cache_size) == -1)
1658         log_write("munmap(): %s", strerror(errno));
1659
1660     if (estatus == EXIT_SUCCESS)
1661         log_write(N_("pwmd exiting normally"));
1662
1663     pth_kill();
1664 #if defined(DEBUG) && !defined(MEM_DEBUG)
1665     xdump();
1666 #endif
1667     exit(estatus);
1668 }