loadparm.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License as published by
   4  * the Free Software Foundation; either version 3 of the License, or
   5  * (at your option) any later version.
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  *
  12  * You should have received a copy of the GNU General Public License along
  13  * with this program; if not, visit the http://fsf.org website.
  14  */
  15
  16 /* This is based on loadparm.c from Samba, written by Andrew Tridgell
  17  * and Karl Auer.  Some of the changes are:
  18  *
  19  * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
  20  * Copyright (C) 2003-2009 Wayne Davison <wayned@samba.org>
  21  */
  22
  23 /* Load parameters.
  24  *
  25  *  This module provides suitable callback functions for the params
  26  *  module. It builds the internal table of section details which is
  27  *  then used by the rest of the server.
  28  *
  29  * To add a parameter:
  30  *
  31  * 1) add it to the global_vars or local_vars structure definition
  32  * 2) add it to the parm_table
  33  * 3) add it to the list of available functions (eg: using FN_GLOBAL_STRING())
  34  * 4) initialise it in the Defaults static stucture
  35  *
  36  * Notes:
  37  *   The configuration file is processed sequentially for speed. For this
  38  *   reason, there is a fair bit of sequence-dependent code here - ie., code
  39  *   which assumes that certain things happen before others. In particular, the
  40  *   code which happens at the boundary between sections is delicately poised,
  41  *   so be careful!
  42  */
  43
  44 #include "rsync.h"
  45 #include "itypes.h"
  46
  47 extern item_list dparam_list;
  48
  49 #define strequal(a, b) (strcasecmp(a, b)==0)
  50 #define BOOLSTR(b) ((b) ? "Yes" : "No")
  51
  52 #ifndef LOG_DAEMON
  53 #define LOG_DAEMON 0
  54 #endif
  55
  56 #define DEFAULT_DONT_COMPRESS "*.gz *.zip *.z *.rpm *.deb *.iso *.bz2" \
  57         " *.t[gb]z *.7z *.mp[34] *.mov *.avi *.ogg *.jpg *.jpeg *.png" \
  58         " *.lzo *.rzip *.lzma *.rar *.ace *.gpg *.xz *.txz *.lz *.tlz"
  59
  60 /* the following are used by loadparm for option lists */
  61 typedef enum {
  62         P_BOOL, P_BOOLREV, P_CHAR, P_INTEGER,
  63         P_OCTAL, P_PATH, P_STRING, P_ENUM
  64 } parm_type;
  65
  66 typedef enum {
  67         P_LOCAL, P_GLOBAL, P_NONE
  68 } parm_class;
  69
  70 struct enum_list {
  71         int value;
  72         char *name;
  73 };
  74
  75 struct parm_struct {
  76         char *label;
  77         parm_type type;
  78         parm_class class;
  79         void *ptr;
  80         struct enum_list *enum_list;
  81         unsigned flags;
  82 };
  83
  84 #ifndef GLOBAL_NAME
  85 #define GLOBAL_NAME "global"
  86 #endif
  87
  88 /* some helpful bits */
  89 #define iSECTION(i) ((local_vars*)section_list.items)[i]
  90 #define LP_SNUM_OK(i) ((i) >= 0 && (i) < (int)section_list.count)
  91 #define SECTION_PTR(s, p) (((char*)(s)) + (ptrdiff_t)(((char*)(p))-(char*)&Vars.l))
  92
  93 /* This structure describes global (ie., server-wide) parameters. */
  94 typedef struct {
  95         char *bind_address;
  96         char *motd_file;
  97         char *pid_file;
  98         char *socket_options;
  99
 100         int listen_backlog;
 101         int rsync_port;
 102 } global_vars;
 103
 104 /* This structure describes a single section.  Their order must match the
 105  * initializers below, which you can accomplish by keeping each sub-section
 106  * sorted.  (e.g. in vim, just visually select each subsection and use !sort.)
 107  * NOTE: the char* variables MUST all remain at the start of the stuct! */
 108 typedef struct {
 109         char *auth_users;
 110         char *charset;
 111         char *comment;
 112         char *dont_compress;
 113         char *exclude;
 114         char *exclude_from;
 115         char *filter;
 116         char *gid;
 117         char *hosts_allow;
 118         char *hosts_deny;
 119         char *include;
 120         char *include_from;
 121         char *incoming_chmod;
 122         char *lock_file;
 123         char *log_file;
 124         char *log_format;
 125         char *name;
 126         char *outgoing_chmod;
 127         char *path;
 128         char *postxfer_exec;
 129         char *prexfer_exec;
 130         char *refuse_options;
 131         char *secrets_file;
 132         char *temp_dir;
 133         char *uid;
 134 /* NOTE: update this macro if the last char* variable changes! */
 135 #define LOCAL_STRING_COUNT() (offsetof(local_vars, uid) / sizeof (char*) + 1)
 136
 137         int max_connections;
 138         int max_verbosity;
 139         int syslog_facility;
 140         int timeout;
 141
 142         BOOL fake_super;
 143         BOOL forward_lookup;
 144         BOOL ignore_errors;
 145         BOOL ignore_nonreadable;
 146         BOOL list;
 147         BOOL munge_symlinks;
 148         BOOL numeric_ids;
 149         BOOL read_only;
 150         BOOL reverse_lookup;
 151         BOOL strict_modes;
 152         BOOL transfer_logging;
 153         BOOL use_chroot;
 154         BOOL write_only;
 155 } local_vars;
 156
 157 /* This structure describes the global variables (g) as well as the globally
 158  * specified values of the local variables (l), which are used when modules
 159  * don't specify their own values. */
 160 typedef struct {
 161         global_vars g;
 162         local_vars l;
 163 } all_vars;
 164
 165 /* The application defaults for all the variables.  "Defaults" is
 166  * used to re-initialize "Vars" before each config-file read.
 167  *
 168  * In order to keep these sorted in the same way as the structure
 169  * above, use the variable name in the leading comment, including a
 170  * trailing ';' (to avoid a sorting problem with trailing digits). */
 171 static const all_vars Defaults = {
 172  /* ==== global_vars ==== */
 173  {
 174  /* bind_address; */            NULL,
 175  /* motd_file; */               NULL,
 176  /* pid_file; */                NULL,
 177  /* socket_options; */          NULL,
 178
 179  /* listen_backlog; */          5,
 180  /* rsync_port; */              0,
 181  },
 182
 183  /* ==== local_vars ==== */
 184  {
 185  /* auth_users; */              NULL,
 186  /* charset; */                 NULL,
 187  /* comment; */                 NULL,
 188  /* dont_compress; */           DEFAULT_DONT_COMPRESS,
 189  /* exclude; */                 NULL,
 190  /* exclude_from; */            NULL,
 191  /* filter; */                  NULL,
 192  /* gid; */                     NULL,
 193  /* hosts_allow; */             NULL,
 194  /* hosts_deny; */              NULL,
 195  /* include; */                 NULL,
 196  /* include_from; */            NULL,
 197  /* incoming_chmod; */          NULL,
 198  /* lock_file; */               DEFAULT_LOCK_FILE,
 199  /* log_file; */                NULL,
 200  /* log_format; */              "%o %h [%a] %m (%u) %f %l",
 201  /* name; */                    NULL,
 202  /* outgoing_chmod; */          NULL,
 203  /* path; */                    NULL,
 204  /* postxfer_exec; */           NULL,
 205  /* prexfer_exec; */            NULL,
 206  /* refuse_options; */          NULL,
 207  /* secrets_file; */            NULL,
 208  /* temp_dir; */                NULL,
 209  /* uid; */                     NULL,
 210
 211  /* max_connections; */         0,
 212  /* max_verbosity; */           1,
 213  /* syslog_facility; */         LOG_DAEMON,
 214  /* timeout; */                 0,
 215
 216  /* fake_super; */              False,
 217  /* forward_lookup; */          True,
 218  /* ignore_errors; */           False,
 219  /* ignore_nonreadable; */      False,
 220  /* list; */                    True,
 221  /* munge_symlinks; */          (BOOL)-1,
 222  /* numeric_ids; */             (BOOL)-1,
 223  /* read_only; */               True,
 224  /* reverse_lookup; */          True,
 225  /* strict_modes; */            True,
 226  /* transfer_logging; */        False,
 227  /* use_chroot; */              True,
 228  /* write_only; */              False,
 229  }
 230 };
 231
 232 /* The currently configured values for all the variables. */
 233 static all_vars Vars;
 234
 235 /* Stack of "Vars" values used by the &include directive. */
 236 static item_list Vars_stack = EMPTY_ITEM_LIST;
 237
 238 /* The array of section values that holds all the defined modules. */
 239 static item_list section_list = EMPTY_ITEM_LIST;
 240
 241 static int iSectionIndex = -1;
 242 static BOOL bInGlobalSection = True;
 243
 244 #define NUMPARAMETERS (sizeof (parm_table) / sizeof (struct parm_struct))
 245
 246 static struct enum_list enum_facilities[] = {
 247 #ifdef LOG_AUTH
 248         { LOG_AUTH, "auth" },
 249 #endif
 250 #ifdef LOG_AUTHPRIV
 251         { LOG_AUTHPRIV, "authpriv" },
 252 #endif
 253 #ifdef LOG_CRON
 254         { LOG_CRON, "cron" },
 255 #endif
 256 #ifdef LOG_DAEMON
 257         { LOG_DAEMON, "daemon" },
 258 #endif
 259 #ifdef LOG_FTP
 260         { LOG_FTP, "ftp" },
 261 #endif
 262 #ifdef LOG_KERN
 263         { LOG_KERN, "kern" },
 264 #endif
 265 #ifdef LOG_LPR
 266         { LOG_LPR, "lpr" },
 267 #endif
 268 #ifdef LOG_MAIL
 269         { LOG_MAIL, "mail" },
 270 #endif
 271 #ifdef LOG_NEWS
 272         { LOG_NEWS, "news" },
 273 #endif
 274 #ifdef LOG_AUTH
 275         { LOG_AUTH, "security" },
 276 #endif
 277 #ifdef LOG_SYSLOG
 278         { LOG_SYSLOG, "syslog" },
 279 #endif
 280 #ifdef LOG_USER
 281         { LOG_USER, "user" },
 282 #endif
 283 #ifdef LOG_UUCP
 284         { LOG_UUCP, "uucp" },
 285 #endif
 286 #ifdef LOG_LOCAL0
 287         { LOG_LOCAL0, "local0" },
 288 #endif
 289 #ifdef LOG_LOCAL1
 290         { LOG_LOCAL1, "local1" },
 291 #endif
 292 #ifdef LOG_LOCAL2
 293         { LOG_LOCAL2, "local2" },
 294 #endif
 295 #ifdef LOG_LOCAL3
 296         { LOG_LOCAL3, "local3" },
 297 #endif
 298 #ifdef LOG_LOCAL4
 299         { LOG_LOCAL4, "local4" },
 300 #endif
 301 #ifdef LOG_LOCAL5
 302         { LOG_LOCAL5, "local5" },
 303 #endif
 304 #ifdef LOG_LOCAL6
 305         { LOG_LOCAL6, "local6" },
 306 #endif
 307 #ifdef LOG_LOCAL7
 308         { LOG_LOCAL7, "local7" },
 309 #endif
 310         { -1, NULL }
 311 };
 312
 313 static struct parm_struct parm_table[] =
 314 {
 315  {"address",           P_STRING, P_GLOBAL,&Vars.g.bind_address,        NULL,0},
 316  {"listen backlog",    P_INTEGER,P_GLOBAL,&Vars.g.listen_backlog,      NULL,0},
 317  {"motd file",         P_STRING, P_GLOBAL,&Vars.g.motd_file,           NULL,0},
 318  {"pid file",          P_STRING, P_GLOBAL,&Vars.g.pid_file,            NULL,0},
 319  {"port",              P_INTEGER,P_GLOBAL,&Vars.g.rsync_port,          NULL,0},
 320  {"socket options",    P_STRING, P_GLOBAL,&Vars.g.socket_options,      NULL,0},
 321
 322  {"auth users",        P_STRING, P_LOCAL, &Vars.l.auth_users,          NULL,0},
 323  {"charset",           P_STRING, P_LOCAL, &Vars.l.charset,             NULL,0},
 324  {"comment",           P_STRING, P_LOCAL, &Vars.l.comment,             NULL,0},
 325  {"dont compress",     P_STRING, P_LOCAL, &Vars.l.dont_compress,       NULL,0},
 326  {"exclude from",      P_STRING, P_LOCAL, &Vars.l.exclude_from,        NULL,0},
 327  {"exclude",           P_STRING, P_LOCAL, &Vars.l.exclude,             NULL,0},
 328  {"fake super",        P_BOOL,   P_LOCAL, &Vars.l.fake_super,          NULL,0},
 329  {"filter",            P_STRING, P_LOCAL, &Vars.l.filter,              NULL,0},
 330  {"forward lookup",    P_BOOL,   P_LOCAL, &Vars.l.forward_lookup,      NULL,0},
 331  {"gid",               P_STRING, P_LOCAL, &Vars.l.gid,                 NULL,0},
 332  {"hosts allow",       P_STRING, P_LOCAL, &Vars.l.hosts_allow,         NULL,0},
 333  {"hosts deny",        P_STRING, P_LOCAL, &Vars.l.hosts_deny,          NULL,0},
 334  {"ignore errors",     P_BOOL,   P_LOCAL, &Vars.l.ignore_errors,       NULL,0},
 335  {"ignore nonreadable",P_BOOL,   P_LOCAL, &Vars.l.ignore_nonreadable,  NULL,0},
 336  {"include from",      P_STRING, P_LOCAL, &Vars.l.include_from,        NULL,0},
 337  {"include",           P_STRING, P_LOCAL, &Vars.l.include,             NULL,0},
 338  {"incoming chmod",    P_STRING, P_LOCAL, &Vars.l.incoming_chmod,      NULL,0},
 339  {"list",              P_BOOL,   P_LOCAL, &Vars.l.list,                NULL,0},
 340  {"lock file",         P_STRING, P_LOCAL, &Vars.l.lock_file,           NULL,0},
 341  {"log file",          P_STRING, P_LOCAL, &Vars.l.log_file,            NULL,0},
 342  {"log format",        P_STRING, P_LOCAL, &Vars.l.log_format,          NULL,0},
 343  {"max connections",   P_INTEGER,P_LOCAL, &Vars.l.max_connections,     NULL,0},
 344  {"max verbosity",     P_INTEGER,P_LOCAL, &Vars.l.max_verbosity,       NULL,0},
 345  {"munge symlinks",    P_BOOL,   P_LOCAL, &Vars.l.munge_symlinks,      NULL,0},
 346  {"name",              P_STRING, P_LOCAL, &Vars.l.name,                NULL,0},
 347  {"numeric ids",       P_BOOL,   P_LOCAL, &Vars.l.numeric_ids,         NULL,0},
 348  {"outgoing chmod",    P_STRING, P_LOCAL, &Vars.l.outgoing_chmod,      NULL,0},
 349  {"path",              P_PATH,   P_LOCAL, &Vars.l.path,                NULL,0},
 350 #ifdef HAVE_PUTENV
 351  {"post-xfer exec",    P_STRING, P_LOCAL, &Vars.l.postxfer_exec,       NULL,0},
 352  {"pre-xfer exec",     P_STRING, P_LOCAL, &Vars.l.prexfer_exec,        NULL,0},
 353 #endif
 354  {"read only",         P_BOOL,   P_LOCAL, &Vars.l.read_only,           NULL,0},
 355  {"refuse options",    P_STRING, P_LOCAL, &Vars.l.refuse_options,      NULL,0},
 356  {"reverse lookup",    P_BOOL,   P_LOCAL, &Vars.l.reverse_lookup,      NULL,0},
 357  {"secrets file",      P_STRING, P_LOCAL, &Vars.l.secrets_file,        NULL,0},
 358  {"strict modes",      P_BOOL,   P_LOCAL, &Vars.l.strict_modes,        NULL,0},
 359  {"syslog facility",   P_ENUM,   P_LOCAL, &Vars.l.syslog_facility,     enum_facilities,0},
 360  {"temp dir",          P_PATH,   P_LOCAL, &Vars.l.temp_dir,            NULL,0},
 361  {"timeout",           P_INTEGER,P_LOCAL, &Vars.l.timeout,             NULL,0},
 362  {"transfer logging",  P_BOOL,   P_LOCAL, &Vars.l.transfer_logging,    NULL,0},
 363  {"uid",               P_STRING, P_LOCAL, &Vars.l.uid,                 NULL,0},
 364  {"use chroot",        P_BOOL,   P_LOCAL, &Vars.l.use_chroot,          NULL,0},
 365  {"write only",        P_BOOL,   P_LOCAL, &Vars.l.write_only,          NULL,0},
 366  {NULL,                P_BOOL,   P_NONE,  NULL,                        NULL,0}
 367 };
 368
 369 /* Initialise the Default all_vars structure. */
 370 static void reset_all_vars(void)
 371 {
 372         memcpy(&Vars, &Defaults, sizeof Vars);
 373 }
 374
 375 /* Expand %VAR% references.  Any unknown vars or unrecognized
 376  * syntax leaves the raw chars unchanged. */
 377 static char *expand_vars(char *str)
 378 {
 379         char *buf, *t, *f;
 380         int bufsize;
 381
 382         if (strchr(str, '%') == NULL)
 383                 return str;
 384
 385         bufsize = strlen(str) + 2048;
 386         if ((buf = new_array(char, bufsize+1)) == NULL) /* +1 for trailing '\0' */
 387                 out_of_memory("expand_vars");
 388
 389         for (t = buf, f = str; bufsize && *f; ) {
 390                 if (*f == '%' && *++f != '%') {
 391                         char *percent = strchr(f, '%');
 392                         if (percent) {
 393                                 char *val;
 394                                 *percent = '\0';
 395                                 val = getenv(f);
 396                                 *percent = '%';
 397                                 if (val) {
 398                                         int len = strlcpy(t, val, bufsize+1);
 399                                         if (len > bufsize)
 400                                                 break;
 401                                         bufsize -= len;
 402                                         t += len;
 403                                         f = percent + 1;
 404                                         continue;
 405                                 }
 406                         }
 407                         f--;
 408                 }
 409                 *t++ = *f++;
 410                 bufsize--;
 411         }
 412         *t = '\0';
 413
 414         if (*f) {
 415                 rprintf(FLOG, "Overflowed buf in expand_vars() trying to expand: %s\n", str);
 416                 exit_cleanup(RERR_MALLOC);
 417         }
 418
 419         if (bufsize && (buf = realloc(buf, t - buf + 1)) == NULL)
 420                 out_of_memory("expand_vars");
 421
 422         return buf;
 423 }
 424
 425 /* In this section all the functions that are used to access the
 426  * parameters from the rest of the program are defined. */
 427
 428 #define FN_GLOBAL_STRING(fn_name, ptr) \
 429  char *fn_name(void) {return expand_vars(*(char **)(ptr) ? *(char **)(ptr) : "");}
 430 #define FN_GLOBAL_BOOL(fn_name, ptr) \
 431  BOOL fn_name(void) {return *(BOOL *)(ptr);}
 432 #define FN_GLOBAL_CHAR(fn_name, ptr) \
 433  char fn_name(void) {return *(char *)(ptr);}
 434 #define FN_GLOBAL_INTEGER(fn_name, ptr) \
 435  int fn_name(void) {return *(int *)(ptr);}
 436
 437 #define FN_LOCAL_STRING(fn_name, val) \
 438  char *fn_name(int i) {return expand_vars(LP_SNUM_OK(i) && iSECTION(i).val ? iSECTION(i).val : Vars.l.val ? Vars.l.val : "");}
 439 #define FN_LOCAL_BOOL(fn_name, val) \
 440  BOOL fn_name(int i) {return LP_SNUM_OK(i)? iSECTION(i).val : Vars.l.val;}
 441 #define FN_LOCAL_CHAR(fn_name, val) \
 442  char fn_name(int i) {return LP_SNUM_OK(i)? iSECTION(i).val : Vars.l.val;}
 443 #define FN_LOCAL_INTEGER(fn_name, val) \
 444  int fn_name(int i) {return LP_SNUM_OK(i)? iSECTION(i).val : Vars.l.val;}
 445
 446 FN_GLOBAL_STRING(lp_bind_address, &Vars.g.bind_address)
 447 FN_GLOBAL_STRING(lp_motd_file, &Vars.g.motd_file)
 448 FN_GLOBAL_STRING(lp_pid_file, &Vars.g.pid_file)
 449 FN_GLOBAL_STRING(lp_socket_options, &Vars.g.socket_options)
 450
 451 FN_GLOBAL_INTEGER(lp_listen_backlog, &Vars.g.listen_backlog)
 452 FN_GLOBAL_INTEGER(lp_rsync_port, &Vars.g.rsync_port)
 453
 454 FN_LOCAL_STRING(lp_auth_users, auth_users)
 455 FN_LOCAL_STRING(lp_charset, charset)
 456 FN_LOCAL_STRING(lp_comment, comment)
 457 FN_LOCAL_STRING(lp_dont_compress, dont_compress)
 458 FN_LOCAL_STRING(lp_exclude, exclude)
 459 FN_LOCAL_STRING(lp_exclude_from, exclude_from)
 460 FN_LOCAL_STRING(lp_filter, filter)
 461 FN_LOCAL_STRING(lp_gid, gid)
 462 FN_LOCAL_STRING(lp_hosts_allow, hosts_allow)
 463 FN_LOCAL_STRING(lp_hosts_deny, hosts_deny)
 464 FN_LOCAL_STRING(lp_include, include)
 465 FN_LOCAL_STRING(lp_include_from, include_from)
 466 FN_LOCAL_STRING(lp_incoming_chmod, incoming_chmod)
 467 FN_LOCAL_STRING(lp_lock_file, lock_file)
 468 FN_LOCAL_STRING(lp_log_file, log_file)
 469 FN_LOCAL_STRING(lp_log_format, log_format)
 470 FN_LOCAL_STRING(lp_name, name)
 471 FN_LOCAL_STRING(lp_outgoing_chmod, outgoing_chmod)
 472 FN_LOCAL_STRING(lp_path, path)
 473 FN_LOCAL_STRING(lp_postxfer_exec, postxfer_exec)
 474 FN_LOCAL_STRING(lp_prexfer_exec, prexfer_exec)
 475 FN_LOCAL_STRING(lp_refuse_options, refuse_options)
 476 FN_LOCAL_STRING(lp_secrets_file, secrets_file)
 477 FN_LOCAL_STRING(lp_temp_dir, temp_dir)
 478 FN_LOCAL_STRING(lp_uid, uid)
 479
 480 FN_LOCAL_INTEGER(lp_max_connections, max_connections)
 481 FN_LOCAL_INTEGER(lp_max_verbosity, max_verbosity)
 482 FN_LOCAL_INTEGER(lp_syslog_facility, syslog_facility)
 483 FN_LOCAL_INTEGER(lp_timeout, timeout)
 484
 485 FN_LOCAL_BOOL(lp_fake_super, fake_super)
 486 FN_LOCAL_BOOL(lp_forward_lookup, forward_lookup)
 487 FN_LOCAL_BOOL(lp_ignore_errors, ignore_errors)
 488 FN_LOCAL_BOOL(lp_ignore_nonreadable, ignore_nonreadable)
 489 FN_LOCAL_BOOL(lp_list, list)
 490 FN_LOCAL_BOOL(lp_munge_symlinks, munge_symlinks)
 491 FN_LOCAL_BOOL(lp_numeric_ids, numeric_ids)
 492 FN_LOCAL_BOOL(lp_read_only, read_only)
 493 FN_LOCAL_BOOL(lp_reverse_lookup, reverse_lookup)
 494 FN_LOCAL_BOOL(lp_strict_modes, strict_modes)
 495 FN_LOCAL_BOOL(lp_transfer_logging, transfer_logging)
 496 FN_LOCAL_BOOL(lp_use_chroot, use_chroot)
 497 FN_LOCAL_BOOL(lp_write_only, write_only)
 498
 499 /* Assign a copy of v to *s.  Handles NULL strings.  We don't worry
 500  * about overwriting a malloc'd string because the long-running
 501  * (port-listening) daemon only loads the config file once, and the
 502  * per-job (forked or xinitd-ran) daemon only re-reads the file at
 503  * the start, so any lost memory is inconsequential. */
 504 static inline void string_set(char **s, const char *v)
 505 {
 506         if (!v)
 507                 *s = NULL;
 508         else if (!(*s = strdup(v)))
 509                 out_of_memory("string_set");
 510 }
 511
 512 /* Copy the local_vars, strdup'ing any strings.  NOTE:  this depends on
 513  * the structure starting with a contiguous list of the char* variables,
 514  * and having an accurate count in the LOCAL_STRING_COUNT() macro. */
 515 static void copy_section(local_vars *psectionDest, local_vars *psectionSource)
 516 {
 517         int count = LOCAL_STRING_COUNT();
 518         char **strings = (char**)psectionDest;
 519
 520         memcpy(psectionDest, psectionSource, sizeof psectionDest[0]);
 521         while (count--) {
 522                 if (strings[count] && !(strings[count] = strdup(strings[count])))
 523                         out_of_memory("copy_section");
 524         }
 525 }
 526
 527 /* Initialise a section to the defaults. */
 528 static void init_section(local_vars *psection)
 529 {
 530         memset(psection, 0, sizeof (local_vars));
 531         copy_section(psection, &Vars.l);
 532 }
 533
 534 /* Do a case-insensitive, whitespace-ignoring string compare. */
 535 static int strwicmp(char *psz1, char *psz2)
 536 {
 537         /* if BOTH strings are NULL, return TRUE, if ONE is NULL return */
 538         /* appropriate value. */
 539         if (psz1 == psz2)
 540                 return 0;
 541
 542         if (psz1 == NULL)
 543                 return -1;
 544
 545         if (psz2 == NULL)
 546                 return 1;
 547
 548         /* sync the strings on first non-whitespace */
 549         while (1) {
 550                 while (isSpace(psz1))
 551                         psz1++;
 552                 while (isSpace(psz2))
 553                         psz2++;
 554                 if (toUpper(psz1) != toUpper(psz2) || *psz1 == '\0' || *psz2 == '\0')
 555                         break;
 556                 psz1++;
 557                 psz2++;
 558         }
 559         return *psz1 - *psz2;
 560 }
 561
 562 /* Find a section by name. Otherwise works like get_section. */
 563 static int getsectionbyname(char *name)
 564 {
 565         int i;
 566
 567         for (i = section_list.count - 1; i >= 0; i--) {
 568                 if (strwicmp(iSECTION(i).name, name) == 0)
 569                         break;
 570         }
 571
 572         return i;
 573 }
 574
 575 /* Add a new section to the sections array w/the default values. */
 576 static int add_a_section(char *name)
 577 {
 578         int i;
 579         local_vars *s;
 580
 581         /* it might already exist */
 582         if (name) {
 583                 i = getsectionbyname(name);
 584                 if (i >= 0)
 585                         return i;
 586         }
 587
 588         i = section_list.count;
 589         s = EXPAND_ITEM_LIST(&section_list, local_vars, 2);
 590
 591         init_section(s);
 592         if (name)
 593                 string_set(&s->name, name);
 594
 595         return i;
 596 }
 597
 598 /* Map a parameter's string representation to something we can use.
 599  * Returns False if the parameter string is not recognised, else TRUE. */
 600 static int map_parameter(char *parmname)
 601 {
 602         int iIndex;
 603
 604         if (*parmname == '-')
 605                 return -1;
 606
 607         for (iIndex = 0; parm_table[iIndex].label; iIndex++) {
 608                 if (strwicmp(parm_table[iIndex].label, parmname) == 0)
 609                         return iIndex;
 610         }
 611
 612         rprintf(FLOG, "Unknown Parameter encountered: \"%s\"\n", parmname);
 613         return -1;
 614 }
 615
 616 /* Set a boolean variable from the text value stored in the passed string.
 617  * Returns True in success, False if the passed string does not correctly
 618  * represent a boolean. */
 619 static BOOL set_boolean(BOOL *pb, char *parmvalue)
 620 {
 621         if (strwicmp(parmvalue, "yes") == 0
 622          || strwicmp(parmvalue, "true") == 0
 623          || strwicmp(parmvalue, "1") == 0)
 624                 *pb = True;
 625         else if (strwicmp(parmvalue, "no") == 0
 626               || strwicmp(parmvalue, "False") == 0
 627               || strwicmp(parmvalue, "0") == 0)
 628                 *pb = False;
 629         else {
 630                 rprintf(FLOG, "Badly formed boolean in configuration file: \"%s\".\n", parmvalue);
 631                 return False;
 632         }
 633         return True;
 634 }
 635
 636 /* Process a parameter. */
 637 static BOOL do_parameter(char *parmname, char *parmvalue)
 638 {
 639         int parmnum, i;
 640         void *parm_ptr; /* where we are going to store the result */
 641         void *def_ptr;
 642         char *cp;
 643
 644         parmnum = map_parameter(parmname);
 645
 646         if (parmnum < 0) {
 647                 rprintf(FLOG, "IGNORING unknown parameter \"%s\"\n", parmname);
 648                 return True;
 649         }
 650
 651         def_ptr = parm_table[parmnum].ptr;
 652
 653         if (bInGlobalSection)
 654                 parm_ptr = def_ptr;
 655         else {
 656                 if (parm_table[parmnum].class == P_GLOBAL) {
 657                         rprintf(FLOG, "Global parameter %s found in module section!\n", parmname);
 658                         return True;
 659                 }
 660                 parm_ptr = SECTION_PTR(&iSECTION(iSectionIndex), def_ptr);
 661         }
 662
 663         /* now switch on the type of variable it is */
 664         switch (parm_table[parmnum].type) {
 665         case P_PATH:
 666         case P_STRING:
 667                 /* delay expansion of vars */
 668                 break;
 669         default:
 670                 /* expand any %VARS% now */
 671                 parmvalue = expand_vars(parmvalue);
 672                 break;
 673         }
 674
 675         switch (parm_table[parmnum].type) {
 676         case P_BOOL:
 677                 set_boolean(parm_ptr, parmvalue);
 678                 break;
 679
 680         case P_BOOLREV:
 681                 set_boolean(parm_ptr, parmvalue);
 682                 *(BOOL *)parm_ptr = ! *(BOOL *)parm_ptr;
 683                 break;
 684
 685         case P_INTEGER:
 686                 *(int *)parm_ptr = atoi(parmvalue);
 687                 break;
 688
 689         case P_CHAR:
 690                 *(char *)parm_ptr = *parmvalue;
 691                 break;
 692
 693         case P_OCTAL:
 694                 sscanf(parmvalue, "%o", (int *)parm_ptr);
 695                 break;
 696
 697         case P_PATH:
 698                 string_set(parm_ptr, parmvalue);
 699                 if ((cp = *(char**)parm_ptr) != NULL) {
 700                         int len = strlen(cp);
 701                         while (len > 1 && cp[len-1] == '/') len--;
 702                         cp[len] = '\0';
 703                 }
 704                 break;
 705
 706         case P_STRING:
 707                 string_set(parm_ptr, parmvalue);
 708                 break;
 709
 710         case P_ENUM:
 711                 for (i=0; parm_table[parmnum].enum_list[i].name; i++) {
 712                         if (strequal(parmvalue, parm_table[parmnum].enum_list[i].name)) {
 713                                 *(int *)parm_ptr = parm_table[parmnum].enum_list[i].value;
 714                                 break;
 715                         }
 716                 }
 717                 if (!parm_table[parmnum].enum_list[i].name) {
 718                         if (atoi(parmvalue) > 0)
 719                                 *(int *)parm_ptr = atoi(parmvalue);
 720                 }
 721                 break;
 722         }
 723
 724         return True;
 725 }
 726
 727 /* Process a new section (rsync module).
 728  * Returns True on success, False on failure. */
 729 static BOOL do_section(char *sectionname)
 730 {
 731         BOOL isglobal;
 732
 733         if (*sectionname == ']') { /* A special push/pop/reset directive from params.c */
 734                 bInGlobalSection = 1;
 735                 if (strcmp(sectionname+1, "push") == 0) {
 736                         all_vars *vp = EXPAND_ITEM_LIST(&Vars_stack, all_vars, 2);
 737                         memcpy(vp, &Vars, sizeof Vars);
 738                 } else if (strcmp(sectionname+1, "pop") == 0
 739                  || strcmp(sectionname+1, "reset") == 0) {
 740                         all_vars *vp = ((all_vars*)Vars_stack.items) + Vars_stack.count - 1;
 741                         if (!Vars_stack.count)
 742                                 return False;
 743                         memcpy(&Vars, vp, sizeof Vars);
 744                         if (sectionname[1] == 'p')
 745                                 Vars_stack.count--;
 746                 } else
 747                         return False;
 748                 return True;
 749         }
 750
 751         isglobal = strwicmp(sectionname, GLOBAL_NAME) == 0;
 752
 753         /* At the end of the global section, add any --dparam items. */
 754         if (bInGlobalSection && !isglobal) {
 755                 if (!section_list.count)
 756                         set_dparams(0);
 757         }
 758
 759         /* if we've just struck a global section, note the fact. */
 760         bInGlobalSection = isglobal;
 761
 762         /* check for multiple global sections */
 763         if (bInGlobalSection)
 764                 return True;
 765
 766 #if 0
 767         /* If we have a current section, tidy it up before moving on. */
 768         if (iSectionIndex >= 0) {
 769                 /* Add any tidy work as needed ... */
 770                 if (problem)
 771                         return False;
 772         }
 773 #endif
 774
 775         if (strchr(sectionname, '/') != NULL) {
 776                 rprintf(FLOG, "Warning: invalid section name in configuration file: %s\n", sectionname);
 777                 return False;
 778         }
 779
 780         if ((iSectionIndex = add_a_section(sectionname)) < 0) {
 781                 rprintf(FLOG, "Failed to add a new module\n");
 782                 bInGlobalSection = True;
 783                 return False;
 784         }
 785
 786         return True;
 787 }
 788
 789 /* Load the modules from the config file. Return True on success,
 790  * False on failure. */
 791 int lp_load(char *pszFname, int globals_only)
 792 {
 793         bInGlobalSection = True;
 794
 795         reset_all_vars();
 796
 797         /* We get sections first, so have to start 'behind' to make up. */
 798         iSectionIndex = -1;
 799         return pm_process(pszFname, globals_only ? NULL : do_section, do_parameter);
 800 }
 801
 802 BOOL set_dparams(int syntax_check_only)
 803 {
 804         char *equal, *val, **params = dparam_list.items;
 805         unsigned j;
 806
 807         for (j = 0; j < dparam_list.count; j++) {
 808                 equal = strchr(params[j], '='); /* options.c verified this */
 809                 *equal = '\0';
 810                 if (syntax_check_only) {
 811                         if (map_parameter(params[j]) < 0) {
 812                                 rprintf(FERROR, "Unknown parameter \"%s\"\n", params[j]);
 813                                 *equal = '=';
 814                                 return False;
 815                         }
 816                 } else {
 817                         for (val = equal+1; isSpace(val); val++) {}
 818                         do_parameter(params[j], val);
 819                 }
 820                 *equal = '=';
 821         }
 822
 823         return True;
 824 }
 825
 826 /* Return the max number of modules (sections). */
 827 int lp_num_modules(void)
 828 {
 829         return section_list.count;
 830 }
 831
 832 /* Return the number of the module with the given name, or -1 if it doesn't
 833  * exist. Note that this is a DIFFERENT ANIMAL from the internal function
 834  * getsectionbyname()! This works ONLY if all sections have been loaded,
 835  * and does not copy the found section. */
 836 int lp_number(char *name)
 837 {
 838         int i;
 839
 840         for (i = section_list.count - 1; i >= 0; i--) {
 841                 if (strcmp(lp_name(i), name) == 0)
 842                         break;
 843         }
 844
 845         return i;
 846 }