1 /* $NetBSD: postmap.c,v 1.1.1.1 2009/06/23 10:08:51 tron Exp $ */ 2 3 /*++ 4 /* NAME 5 /* postmap 1 6 /* SUMMARY 7 /* Postfix lookup table management 8 /* SYNOPSIS 9 /* .fi 10 /* \fBpostmap\fR [\fB-Nbfhimnoprsvw\fR] [\fB-c \fIconfig_dir\fR] 11 /* [\fB-d \fIkey\fR] [\fB-q \fIkey\fR] 12 /* [\fIfile_type\fR:]\fIfile_name\fR ... 13 /* DESCRIPTION 14 /* The \fBpostmap\fR(1) command creates or queries one or more Postfix 15 /* lookup tables, or updates an existing one. The input and output 16 /* file formats are expected to be compatible with: 17 /* 18 /* .nf 19 /* \fBmakemap \fIfile_type\fR \fIfile_name\fR < \fIfile_name\fR 20 /* .fi 21 /* 22 /* If the result files do not exist they will be created with the 23 /* same group and other read permissions as their source file. 24 /* 25 /* While the table update is in progress, signal delivery is 26 /* postponed, and an exclusive, advisory, lock is placed on the 27 /* entire table, in order to avoid surprises in spectator 28 /* processes. 29 /* INPUT FILE FORMAT 30 /* .ad 31 /* .fi 32 /* The format of a lookup table input file is as follows: 33 /* .IP \(bu 34 /* A table entry has the form 35 /* .sp 36 /* .nf 37 /* \fIkey\fR whitespace \fIvalue\fR 38 /* .fi 39 /* .IP \(bu 40 /* Empty lines and whitespace-only lines are ignored, as 41 /* are lines whose first non-whitespace character is a `#'. 42 /* .IP \(bu 43 /* A logical line starts with non-whitespace text. A line that 44 /* starts with whitespace continues a logical line. 45 /* .PP 46 /* The \fIkey\fR and \fIvalue\fR are processed as is, except that 47 /* surrounding white space is stripped off. Unlike with Postfix alias 48 /* databases, quotes cannot be used to protect lookup keys that contain 49 /* special characters such as `#' or whitespace. 50 /* 51 /* By default the lookup key is mapped to lowercase to make 52 /* the lookups case insensitive; as of Postfix 2.3 this case 53 /* folding happens only with tables whose lookup keys are 54 /* fixed-case strings such as btree:, dbm: or hash:. With 55 /* earlier versions, the lookup key is folded even with tables 56 /* where a lookup field can match both upper and lower case 57 /* text, such as regexp: and pcre:. This resulted in loss of 58 /* information with $\fInumber\fR substitutions. 59 /* COMMAND-LINE ARGUMENTS 60 /* .ad 61 /* .fi 62 /* .IP \fB-b\fR 63 /* Enable message body query mode. When reading lookup keys 64 /* from standard input with "\fB-q -\fR", process the input 65 /* as if it is an email message in RFC 2822 format. Each line 66 /* of body content becomes one lookup key. 67 /* .sp 68 /* By default, the \fB-b\fR option starts generating lookup 69 /* keys at the first non-header line, and stops when the end 70 /* of the message is reached. 71 /* To simulate \fBbody_checks\fR(5) processing, enable MIME 72 /* parsing with \fB-m\fR. With this, the \fB-b\fR option 73 /* generates no body-style lookup keys for attachment MIME 74 /* headers and for attached message/* headers. 75 /* .sp 76 /* This feature is available in Postfix version 2.6 and later. 77 /* .IP "\fB-c \fIconfig_dir\fR" 78 /* Read the \fBmain.cf\fR configuration file in the named directory 79 /* instead of the default configuration directory. 80 /* .IP "\fB-d \fIkey\fR" 81 /* Search the specified maps for \fIkey\fR and remove one entry per map. 82 /* The exit status is zero when the requested information was found. 83 /* 84 /* If a key value of \fB-\fR is specified, the program reads key 85 /* values from the standard input stream. The exit status is zero 86 /* when at least one of the requested keys was found. 87 /* .IP \fB-f\fR 88 /* Do not fold the lookup key to lower case while creating or querying 89 /* a table. 90 /* 91 /* With Postfix version 2.3 and later, this option has no 92 /* effect for regular expression tables. There, case folding 93 /* is controlled by appending a flag to a pattern. 94 /* .IP \fB-h\fR 95 /* Enable message header query mode. When reading lookup keys 96 /* from standard input with "\fB-q -\fR", process the input 97 /* as if it is an email message in RFC 2822 format. Each 98 /* logical header line becomes one lookup key. A multi-line 99 /* header becomes one lookup key with one or more embedded 100 /* newline characters. 101 /* .sp 102 /* By default, the \fB-h\fR option generates lookup keys until 103 /* the first non-header line is reached. 104 /* To simulate \fBheader_checks\fR(5) processing, enable MIME 105 /* parsing with \fB-m\fR. With this, the \fB-h\fR option also 106 /* generates header-style lookup keys for attachment MIME 107 /* headers and for attached message/* headers. 108 /* .sp 109 /* This feature is available in Postfix version 2.6 and later. 110 /* .IP \fB-i\fR 111 /* Incremental mode. Read entries from standard input and do not 112 /* truncate an existing database. By default, \fBpostmap\fR(1) creates 113 /* a new database from the entries in \fBfile_name\fR. 114 /* .IP \fB-m\fR 115 /* Enable MIME parsing with "\fB-b\fR" and "\fB-h\fR". 116 /* .sp 117 /* This feature is available in Postfix version 2.6 and later. 118 /* .IP \fB-N\fR 119 /* Include the terminating null character that terminates lookup keys 120 /* and values. By default, \fBpostmap\fR(1) does whatever is 121 /* the default for 122 /* the host operating system. 123 /* .IP \fB-n\fR 124 /* Don't include the terminating null character that terminates lookup 125 /* keys and values. By default, \fBpostmap\fR(1) does whatever 126 /* is the default for 127 /* the host operating system. 128 /* .IP \fB-o\fR 129 /* Do not release root privileges when processing a non-root 130 /* input file. By default, \fBpostmap\fR(1) drops root privileges 131 /* and runs as the source file owner instead. 132 /* .IP \fB-p\fR 133 /* Do not inherit the file access permissions from the input file 134 /* when creating a new file. Instead, create a new file with default 135 /* access permissions (mode 0644). 136 /* .IP "\fB-q \fIkey\fR" 137 /* Search the specified maps for \fIkey\fR and write the first value 138 /* found to the standard output stream. The exit status is zero 139 /* when the requested information was found. 140 /* 141 /* If a key value of \fB-\fR is specified, the program reads key 142 /* values from the standard input stream and writes one line of 143 /* \fIkey value\fR output for each key that was found. The exit 144 /* status is zero when at least one of the requested keys was found. 145 /* .IP \fB-r\fR 146 /* When updating a table, do not complain about attempts to update 147 /* existing entries, and make those updates anyway. 148 /* .IP \fB-s\fR 149 /* Retrieve all database elements, and write one line of 150 /* \fIkey value\fR output for each element. The elements are 151 /* printed in database order, which is not necessarily the same 152 /* as the original input order. 153 /* .sp 154 /* This feature is available in Postfix version 2.2 and later, 155 /* and is not available for all database types. 156 /* .IP \fB-v\fR 157 /* Enable verbose logging for debugging purposes. Multiple \fB-v\fR 158 /* options make the software increasingly verbose. 159 /* .IP \fB-w\fR 160 /* When updating a table, do not complain about attempts to update 161 /* existing entries, and ignore those attempts. 162 /* .PP 163 /* Arguments: 164 /* .IP \fIfile_type\fR 165 /* The database type. To find out what types are supported, use 166 /* the "\fBpostconf -m\fR" command. 167 /* 168 /* The \fBpostmap\fR(1) command can query any supported file type, 169 /* but it can create only the following file types: 170 /* .RS 171 /* .IP \fBbtree\fR 172 /* The output file is a btree file, named \fIfile_name\fB.db\fR. 173 /* This is available on systems with support for \fBdb\fR databases. 174 /* .IP \fBcdb\fR 175 /* The output consists of one file, named \fIfile_name\fB.cdb\fR. 176 /* This is available on systems with support for \fBcdb\fR databases. 177 /* .IP \fBdbm\fR 178 /* The output consists of two files, named \fIfile_name\fB.pag\fR and 179 /* \fIfile_name\fB.dir\fR. 180 /* This is available on systems with support for \fBdbm\fR databases. 181 /* .IP \fBhash\fR 182 /* The output file is a hashed file, named \fIfile_name\fB.db\fR. 183 /* This is available on systems with support for \fBdb\fR databases. 184 /* .IP \fBsdbm\fR 185 /* The output consists of two files, named \fIfile_name\fB.pag\fR and 186 /* \fIfile_name\fB.dir\fR. 187 /* This is available on systems with support for \fBsdbm\fR databases. 188 /* .PP 189 /* When no \fIfile_type\fR is specified, the software uses the database 190 /* type specified via the \fBdefault_database_type\fR configuration 191 /* parameter. 192 /* .RE 193 /* .IP \fIfile_name\fR 194 /* The name of the lookup table source file when rebuilding a database. 195 /* DIAGNOSTICS 196 /* Problems are logged to the standard error stream and to 197 /* \fBsyslogd\fR(8). 198 /* No output means that no problems were detected. Duplicate entries are 199 /* skipped and are flagged with a warning. 200 /* 201 /* \fBpostmap\fR(1) terminates with zero exit status in case of success 202 /* (including successful "\fBpostmap -q\fR" lookup) and terminates 203 /* with non-zero exit status in case of failure. 204 /* ENVIRONMENT 205 /* .ad 206 /* .fi 207 /* .IP \fBMAIL_CONFIG\fR 208 /* Directory with Postfix configuration files. 209 /* .IP \fBMAIL_VERBOSE\fR 210 /* Enable verbose logging for debugging purposes. 211 /* CONFIGURATION PARAMETERS 212 /* .ad 213 /* .fi 214 /* The following \fBmain.cf\fR parameters are especially relevant to 215 /* this program. 216 /* The text below provides only a parameter summary. See 217 /* \fBpostconf\fR(5) for more details including examples. 218 /* .IP "\fBberkeley_db_create_buffer_size (16777216)\fR" 219 /* The per-table I/O buffer size for programs that create Berkeley DB 220 /* hash or btree tables. 221 /* .IP "\fBberkeley_db_read_buffer_size (131072)\fR" 222 /* The per-table I/O buffer size for programs that read Berkeley DB 223 /* hash or btree tables. 224 /* .IP "\fBconfig_directory (see 'postconf -d' output)\fR" 225 /* The default location of the Postfix main.cf and master.cf 226 /* configuration files. 227 /* .IP "\fBdefault_database_type (see 'postconf -d' output)\fR" 228 /* The default database type for use in \fBnewaliases\fR(1), \fBpostalias\fR(1) 229 /* and \fBpostmap\fR(1) commands. 230 /* .IP "\fBsyslog_facility (mail)\fR" 231 /* The syslog facility of Postfix logging. 232 /* .IP "\fBsyslog_name (see 'postconf -d' output)\fR" 233 /* The mail system name that is prepended to the process name in syslog 234 /* records, so that "smtpd" becomes, for example, "postfix/smtpd". 235 /* SEE ALSO 236 /* postalias(1), create/update/query alias database 237 /* postconf(1), supported database types 238 /* postconf(5), configuration parameters 239 /* syslogd(8), system logging 240 /* README FILES 241 /* .ad 242 /* .fi 243 /* Use "\fBpostconf readme_directory\fR" or 244 /* "\fBpostconf html_directory\fR" to locate this information. 245 /* .na 246 /* .nf 247 /* DATABASE_README, Postfix lookup table overview 248 /* LICENSE 249 /* .ad 250 /* .fi 251 /* The Secure Mailer license must be distributed with this software. 252 /* AUTHOR(S) 253 /* Wietse Venema 254 /* IBM T.J. Watson Research 255 /* P.O. Box 704 256 /* Yorktown Heights, NY 10598, USA 257 /*--*/ 258 259 /* System library. */ 260 261 #include <sys_defs.h> 262 #include <sys/stat.h> 263 #include <stdlib.h> 264 #include <unistd.h> 265 #include <fcntl.h> 266 #include <ctype.h> 267 #include <string.h> 268 269 /* Utility library. */ 270 271 #include <msg.h> 272 #include <mymalloc.h> 273 #include <vstring.h> 274 #include <vstream.h> 275 #include <msg_vstream.h> 276 #include <msg_syslog.h> 277 #include <readlline.h> 278 #include <stringops.h> 279 #include <split_at.h> 280 #include <vstring_vstream.h> 281 #include <set_eugid.h> 282 283 /* Global library. */ 284 285 #include <mail_conf.h> 286 #include <mail_dict.h> 287 #include <mail_params.h> 288 #include <mail_version.h> 289 #include <mkmap.h> 290 #include <mail_task.h> 291 #include <dict_proxy.h> 292 #include <mime_state.h> 293 #include <rec_type.h> 294 295 /* Application-specific. */ 296 297 #define STR vstring_str 298 #define LEN VSTRING_LEN 299 300 #define POSTMAP_FLAG_AS_OWNER (1<<0) /* open dest as owner of source */ 301 #define POSTMAP_FLAG_SAVE_PERM (1<<1) /* copy access permission from source */ 302 #define POSTMAP_FLAG_HEADER_KEY (1<<2) /* apply to header text */ 303 #define POSTMAP_FLAG_BODY_KEY (1<<3) /* apply to body text */ 304 #define POSTMAP_FLAG_MIME_KEY (1<<4) /* enable MIME parsing */ 305 306 #define POSTMAP_FLAG_HB_KEY (POSTMAP_FLAG_HEADER_KEY | POSTMAP_FLAG_BODY_KEY) 307 #define POSTMAP_FLAG_FULL_KEY (POSTMAP_FLAG_BODY_KEY | POSTMAP_FLAG_MIME_KEY) 308 #define POSTMAP_FLAG_ANY_KEY (POSTMAP_FLAG_HB_KEY | POSTMAP_FLAG_MIME_KEY) 309 310 /* 311 * MIME Engine call-back state for generating lookup keys from an email 312 * message read from standard input. 313 */ 314 typedef struct { 315 DICT **dicts; /* map handles */ 316 char **maps; /* map names */ 317 int map_count; /* yes, indeed */ 318 int dict_flags; /* query flags */ 319 int header_done; /* past primary header */ 320 int found; /* result */ 321 } POSTMAP_KEY_STATE; 322 323 /* postmap - create or update mapping database */ 324 325 static void postmap(char *map_type, char *path_name, int postmap_flags, 326 int open_flags, int dict_flags) 327 { 328 VSTREAM *source_fp; 329 VSTRING *line_buffer; 330 MKMAP *mkmap; 331 int lineno; 332 char *key; 333 char *value; 334 struct stat st; 335 mode_t saved_mask; 336 337 /* 338 * Initialize. 339 */ 340 line_buffer = vstring_alloc(100); 341 if ((open_flags & O_TRUNC) == 0) { 342 source_fp = VSTREAM_IN; 343 vstream_control(source_fp, VSTREAM_CTL_PATH, "stdin", VSTREAM_CTL_END); 344 } else if (strcmp(map_type, DICT_TYPE_PROXY) == 0) { 345 msg_fatal("can't create maps via the proxy service"); 346 } else if ((source_fp = vstream_fopen(path_name, O_RDONLY, 0)) == 0) { 347 msg_fatal("open %s: %m", path_name); 348 } 349 if (fstat(vstream_fileno(source_fp), &st) < 0) 350 msg_fatal("fstat %s: %m", path_name); 351 352 /* 353 * Turn off group/other read permissions as indicated in the source file. 354 */ 355 if ((postmap_flags & POSTMAP_FLAG_SAVE_PERM) && S_ISREG(st.st_mode)) 356 saved_mask = umask(022 | (~st.st_mode & 077)); 357 358 /* 359 * If running as root, run as the owner of the source file, so that the 360 * result shows proper ownership, and so that a bug in postmap does not 361 * allow privilege escalation. 362 */ 363 if ((postmap_flags & POSTMAP_FLAG_AS_OWNER) && getuid() == 0 364 && (st.st_uid != geteuid() || st.st_gid != getegid())) 365 set_eugid(st.st_uid, st.st_gid); 366 367 /* 368 * Open the database, optionally create it when it does not exist, 369 * optionally truncate it when it does exist, and lock out any 370 * spectators. 371 */ 372 mkmap = mkmap_open(map_type, path_name, open_flags, dict_flags); 373 374 /* 375 * And restore the umask, in case it matters. 376 */ 377 if ((postmap_flags & POSTMAP_FLAG_SAVE_PERM) && S_ISREG(st.st_mode)) 378 umask(saved_mask); 379 380 /* 381 * Add records to the database. 382 */ 383 lineno = 0; 384 while (readlline(line_buffer, source_fp, &lineno)) { 385 386 /* 387 * Split on the first whitespace character, then trim leading and 388 * trailing whitespace from key and value. 389 */ 390 key = STR(line_buffer); 391 value = key + strcspn(key, " \t\r\n"); 392 if (*value) 393 *value++ = 0; 394 while (ISSPACE(*value)) 395 value++; 396 trimblanks(key, 0)[0] = 0; 397 trimblanks(value, 0)[0] = 0; 398 399 /* 400 * Enforce the "key whitespace value" format. Disallow missing keys 401 * or missing values. 402 */ 403 if (*key == 0 || *value == 0) { 404 msg_warn("%s, line %d: expected format: key whitespace value", 405 VSTREAM_PATH(source_fp), lineno); 406 continue; 407 } 408 if (key[strlen(key) - 1] == ':') 409 msg_warn("%s, line %d: record is in \"key: value\" format; is this an alias file?", 410 VSTREAM_PATH(source_fp), lineno); 411 412 /* 413 * Store the value under a case-insensitive key. 414 */ 415 mkmap_append(mkmap, key, value); 416 } 417 418 /* 419 * Close the mapping database, and release the lock. 420 */ 421 mkmap_close(mkmap); 422 423 /* 424 * Cleanup. We're about to terminate, but it is a good sanity check. 425 */ 426 vstring_free(line_buffer); 427 if (source_fp != VSTREAM_IN) 428 vstream_fclose(source_fp); 429 } 430 431 /* postmap_body - MIME engine body call-back routine */ 432 433 static void postmap_body(void *ptr, int unused_rec_type, 434 const char *keybuf, 435 ssize_t unused_len, 436 off_t unused_offset) 437 { 438 POSTMAP_KEY_STATE *state = (POSTMAP_KEY_STATE *) ptr; 439 DICT **dicts = state->dicts; 440 char **maps = state->maps; 441 int map_count = state->map_count; 442 int dict_flags = state->dict_flags; 443 const char *map_name; 444 const char *value; 445 int n; 446 447 for (n = 0; n < map_count; n++) { 448 if (dicts[n] == 0) 449 dicts[n] = ((map_name = split_at(maps[n], ':')) != 0 ? 450 dict_open3(maps[n], map_name, O_RDONLY, dict_flags) : 451 dict_open3(var_db_type, maps[n], O_RDONLY, dict_flags)); 452 if ((value = dict_get(dicts[n], keybuf)) != 0) { 453 if (*value == 0) { 454 msg_warn("table %s:%s: key %s: empty string result is not allowed", 455 dicts[n]->type, dicts[n]->name, keybuf); 456 msg_warn("table %s:%s should return NO RESULT in case of NOT FOUND", 457 dicts[n]->type, dicts[n]->name); 458 } 459 vstream_printf("%s %s\n", keybuf, value); 460 state->found = 1; 461 break; 462 } 463 } 464 } 465 466 /* postmap_header - MIME engine header call-back routine */ 467 468 static void postmap_header(void *ptr, int unused_header_class, 469 const HEADER_OPTS *unused_header_info, 470 VSTRING *header_buf, 471 off_t offset) 472 { 473 474 /* 475 * Don't re-invent an already working wheel. 476 */ 477 postmap_body(ptr, 0, STR(header_buf), LEN(header_buf), offset); 478 } 479 480 /* postmap_head_end - MIME engine end-of-header call-back routine */ 481 482 static void postmap_head_end(void *ptr) 483 { 484 POSTMAP_KEY_STATE *state = (POSTMAP_KEY_STATE *) ptr; 485 486 /* 487 * Don't process the message body when we only examine primary headers. 488 */ 489 state->header_done = 1; 490 } 491 492 /* postmap_queries - apply multiple requests from stdin */ 493 494 static int postmap_queries(VSTREAM *in, char **maps, const int map_count, 495 const int postmap_flags, 496 const int dict_flags) 497 { 498 int found = 0; 499 VSTRING *keybuf = vstring_alloc(100); 500 DICT **dicts; 501 const char *map_name; 502 const char *value; 503 int n; 504 505 /* 506 * Sanity check. 507 */ 508 if (map_count <= 0) 509 msg_panic("postmap_queries: bad map count"); 510 511 /* 512 * Prepare to open maps lazily. 513 */ 514 dicts = (DICT **) mymalloc(sizeof(*dicts) * map_count); 515 for (n = 0; n < map_count; n++) 516 dicts[n] = 0; 517 518 /* 519 * Perform all queries. Open maps on the fly, to avoid opening unecessary 520 * maps. 521 */ 522 if ((postmap_flags & POSTMAP_FLAG_HB_KEY) == 0) { 523 while (vstring_get_nonl(keybuf, in) != VSTREAM_EOF) { 524 for (n = 0; n < map_count; n++) { 525 if (dicts[n] == 0) 526 dicts[n] = ((map_name = split_at(maps[n], ':')) != 0 ? 527 dict_open3(maps[n], map_name, O_RDONLY, dict_flags) : 528 dict_open3(var_db_type, maps[n], O_RDONLY, dict_flags)); 529 if ((value = dict_get(dicts[n], STR(keybuf))) != 0) { 530 if (*value == 0) { 531 msg_warn("table %s:%s: key %s: empty string result is not allowed", 532 dicts[n]->type, dicts[n]->name, STR(keybuf)); 533 msg_warn("table %s:%s should return NO RESULT in case of NOT FOUND", 534 dicts[n]->type, dicts[n]->name); 535 } 536 vstream_printf("%s %s\n", STR(keybuf), value); 537 found = 1; 538 break; 539 } 540 } 541 } 542 } else { 543 POSTMAP_KEY_STATE key_state; 544 MIME_STATE *mime_state; 545 int mime_errs = 0; 546 547 /* 548 * Bundle up the request and instantiate a MIME parsing engine. 549 */ 550 key_state.dicts = dicts; 551 key_state.maps = maps; 552 key_state.map_count = map_count; 553 key_state.dict_flags = dict_flags; 554 key_state.header_done = 0; 555 key_state.found = 0; 556 mime_state = 557 mime_state_alloc((postmap_flags & POSTMAP_FLAG_MIME_KEY) ? 558 0 : MIME_OPT_DISABLE_MIME, 559 (postmap_flags & POSTMAP_FLAG_HEADER_KEY) ? 560 postmap_header : (MIME_STATE_HEAD_OUT) 0, 561 (postmap_flags & POSTMAP_FLAG_FULL_KEY) ? 562 (MIME_STATE_ANY_END) 0 : postmap_head_end, 563 (postmap_flags & POSTMAP_FLAG_BODY_KEY) ? 564 postmap_body : (MIME_STATE_BODY_OUT) 0, 565 (MIME_STATE_ANY_END) 0, 566 (MIME_STATE_ERR_PRINT) 0, 567 (void *) &key_state); 568 569 /* 570 * Process the input message. 571 */ 572 while (vstring_get_nonl(keybuf, in) != VSTREAM_EOF 573 && key_state.header_done == 0 && mime_errs == 0) 574 mime_errs = mime_state_update(mime_state, REC_TYPE_NORM, 575 STR(keybuf), LEN(keybuf)); 576 577 /* 578 * Flush the MIME engine output buffer and tidy up loose ends. 579 */ 580 if (mime_errs == 0) 581 mime_errs = mime_state_update(mime_state, REC_TYPE_END, "", 0); 582 if (mime_errs) 583 msg_fatal("message format error: %s", 584 mime_state_detail(mime_errs)->text); 585 mime_state_free(mime_state); 586 found = key_state.found; 587 } 588 if (found) 589 vstream_fflush(VSTREAM_OUT); 590 591 /* 592 * Cleanup. 593 */ 594 for (n = 0; n < map_count; n++) 595 if (dicts[n]) 596 dict_close(dicts[n]); 597 myfree((char *) dicts); 598 vstring_free(keybuf); 599 600 return (found); 601 } 602 603 /* postmap_query - query a map and print the result to stdout */ 604 605 static int postmap_query(const char *map_type, const char *map_name, 606 const char *key, int dict_flags) 607 { 608 DICT *dict; 609 const char *value; 610 611 dict = dict_open3(map_type, map_name, O_RDONLY, dict_flags); 612 if ((value = dict_get(dict, key)) != 0) { 613 if (*value == 0) { 614 msg_warn("table %s:%s: key %s: empty string result is not allowed", 615 map_type, map_name, key); 616 msg_warn("table %s:%s should return NO RESULT in case of NOT FOUND", 617 map_type, map_name); 618 } 619 vstream_printf("%s\n", value); 620 } 621 vstream_fflush(VSTREAM_OUT); 622 dict_close(dict); 623 return (value != 0); 624 } 625 626 /* postmap_deletes - apply multiple requests from stdin */ 627 628 static int postmap_deletes(VSTREAM *in, char **maps, const int map_count, 629 int dict_flags) 630 { 631 int found = 0; 632 VSTRING *keybuf = vstring_alloc(100); 633 DICT **dicts; 634 const char *map_name; 635 int n; 636 int open_flags; 637 638 /* 639 * Sanity check. 640 */ 641 if (map_count <= 0) 642 msg_panic("postmap_deletes: bad map count"); 643 644 /* 645 * Open maps ahead of time. 646 */ 647 dicts = (DICT **) mymalloc(sizeof(*dicts) * map_count); 648 for (n = 0; n < map_count; n++) { 649 map_name = split_at(maps[n], ':'); 650 if (map_name && strcmp(maps[n], DICT_TYPE_PROXY) == 0) 651 open_flags = O_RDWR | O_CREAT; /* XXX */ 652 else 653 open_flags = O_RDWR; 654 dicts[n] = (map_name != 0 ? 655 dict_open3(maps[n], map_name, open_flags, dict_flags) : 656 dict_open3(var_db_type, maps[n], open_flags, dict_flags)); 657 } 658 659 /* 660 * Perform all requests. 661 */ 662 while (vstring_get_nonl(keybuf, in) != VSTREAM_EOF) 663 for (n = 0; n < map_count; n++) 664 found |= (dict_del(dicts[n], STR(keybuf)) == 0); 665 666 /* 667 * Cleanup. 668 */ 669 for (n = 0; n < map_count; n++) 670 if (dicts[n]) 671 dict_close(dicts[n]); 672 myfree((char *) dicts); 673 vstring_free(keybuf); 674 675 return (found); 676 } 677 678 /* postmap_delete - delete a (key, value) pair from a map */ 679 680 static int postmap_delete(const char *map_type, const char *map_name, 681 const char *key, int dict_flags) 682 { 683 DICT *dict; 684 int status; 685 int open_flags; 686 687 if (strcmp(map_type, DICT_TYPE_PROXY) == 0) 688 open_flags = O_RDWR | O_CREAT; /* XXX */ 689 else 690 open_flags = O_RDWR; 691 dict = dict_open3(map_type, map_name, open_flags, dict_flags); 692 status = dict_del(dict, key); 693 dict_close(dict); 694 return (status == 0); 695 } 696 697 /* postmap_seq - print all map entries to stdout */ 698 699 static void postmap_seq(const char *map_type, const char *map_name, 700 int dict_flags) 701 { 702 DICT *dict; 703 const char *key; 704 const char *value; 705 int func; 706 707 if (strcmp(map_type, DICT_TYPE_PROXY) == 0) 708 msg_fatal("can't sequence maps via the proxy service"); 709 dict = dict_open3(map_type, map_name, O_RDONLY, dict_flags); 710 for (func = DICT_SEQ_FUN_FIRST; /* void */ ; func = DICT_SEQ_FUN_NEXT) { 711 if (dict_seq(dict, func, &key, &value) != 0) 712 break; 713 if (*key == 0) { 714 msg_warn("table %s:%s: empty lookup key value is not allowed", 715 map_type, map_name); 716 } else if (*value == 0) { 717 msg_warn("table %s:%s: key %s: empty string result is not allowed", 718 map_type, map_name, key); 719 msg_warn("table %s:%s should return NO RESULT in case of NOT FOUND", 720 map_type, map_name); 721 } 722 vstream_printf("%s %s\n", key, value); 723 } 724 vstream_fflush(VSTREAM_OUT); 725 dict_close(dict); 726 } 727 728 /* usage - explain */ 729 730 static NORETURN usage(char *myname) 731 { 732 msg_fatal("usage: %s [-Nfinoprsvw] [-c config_dir] [-d key] [-q key] [map_type:]file...", 733 myname); 734 } 735 736 MAIL_VERSION_STAMP_DECLARE; 737 738 int main(int argc, char **argv) 739 { 740 char *path_name; 741 int ch; 742 int fd; 743 char *slash; 744 struct stat st; 745 int postmap_flags = POSTMAP_FLAG_AS_OWNER | POSTMAP_FLAG_SAVE_PERM; 746 int open_flags = O_RDWR | O_CREAT | O_TRUNC; 747 int dict_flags = DICT_FLAG_DUP_WARN | DICT_FLAG_FOLD_FIX; 748 char *query = 0; 749 char *delkey = 0; 750 int sequence = 0; 751 int found; 752 753 /* 754 * Fingerprint executables and core dumps. 755 */ 756 MAIL_VERSION_STAMP_ALLOCATE; 757 758 /* 759 * Be consistent with file permissions. 760 */ 761 umask(022); 762 763 /* 764 * To minimize confusion, make sure that the standard file descriptors 765 * are open before opening anything else. XXX Work around for 44BSD where 766 * fstat can return EBADF on an open file descriptor. 767 */ 768 for (fd = 0; fd < 3; fd++) 769 if (fstat(fd, &st) == -1 770 && (close(fd), open("/dev/null", O_RDWR, 0)) != fd) 771 msg_fatal("open /dev/null: %m"); 772 773 /* 774 * Process environment options as early as we can. We are not set-uid, 775 * and we are supposed to be running in a controlled environment. 776 */ 777 if (getenv(CONF_ENV_VERB)) 778 msg_verbose = 1; 779 780 /* 781 * Initialize. Set up logging, read the global configuration file and 782 * extract configuration information. 783 */ 784 if ((slash = strrchr(argv[0], '/')) != 0 && slash[1]) 785 argv[0] = slash + 1; 786 msg_vstream_init(argv[0], VSTREAM_ERR); 787 msg_syslog_init(mail_task(argv[0]), LOG_PID, LOG_FACILITY); 788 789 /* 790 * Parse JCL. 791 */ 792 while ((ch = GETOPT(argc, argv, "Nbc:d:fhimnopq:rsvw")) > 0) { 793 switch (ch) { 794 default: 795 usage(argv[0]); 796 break; 797 case 'N': 798 dict_flags |= DICT_FLAG_TRY1NULL; 799 dict_flags &= ~DICT_FLAG_TRY0NULL; 800 break; 801 case 'b': 802 postmap_flags |= POSTMAP_FLAG_BODY_KEY; 803 break; 804 case 'c': 805 if (setenv(CONF_ENV_PATH, optarg, 1) < 0) 806 msg_fatal("out of memory"); 807 break; 808 case 'd': 809 if (sequence || query || delkey) 810 msg_fatal("specify only one of -s -q or -d"); 811 delkey = optarg; 812 break; 813 case 'f': 814 dict_flags &= ~DICT_FLAG_FOLD_FIX; 815 break; 816 case 'h': 817 postmap_flags |= POSTMAP_FLAG_HEADER_KEY; 818 break; 819 case 'i': 820 open_flags &= ~O_TRUNC; 821 break; 822 case 'm': 823 postmap_flags |= POSTMAP_FLAG_MIME_KEY; 824 break; 825 case 'n': 826 dict_flags |= DICT_FLAG_TRY0NULL; 827 dict_flags &= ~DICT_FLAG_TRY1NULL; 828 break; 829 case 'o': 830 postmap_flags &= ~POSTMAP_FLAG_AS_OWNER; 831 break; 832 case 'p': 833 postmap_flags &= ~POSTMAP_FLAG_SAVE_PERM; 834 break; 835 case 'q': 836 if (sequence || query || delkey) 837 msg_fatal("specify only one of -s -q or -d"); 838 query = optarg; 839 break; 840 case 'r': 841 dict_flags &= ~(DICT_FLAG_DUP_WARN | DICT_FLAG_DUP_IGNORE); 842 dict_flags |= DICT_FLAG_DUP_REPLACE; 843 break; 844 case 's': 845 if (query || delkey) 846 msg_fatal("specify only one of -s or -q or -d"); 847 sequence = 1; 848 break; 849 case 'v': 850 msg_verbose++; 851 break; 852 case 'w': 853 dict_flags &= ~(DICT_FLAG_DUP_WARN | DICT_FLAG_DUP_REPLACE); 854 dict_flags |= DICT_FLAG_DUP_IGNORE; 855 break; 856 } 857 } 858 mail_conf_read(); 859 if (strcmp(var_syslog_name, DEF_SYSLOG_NAME) != 0) 860 msg_syslog_init(mail_task(argv[0]), LOG_PID, LOG_FACILITY); 861 mail_dict_init(); 862 if ((query == 0 || strcmp(query, "-") != 0) 863 && (postmap_flags & POSTMAP_FLAG_ANY_KEY)) 864 msg_fatal("specify -b -h or -m only with \"-q -\""); 865 866 /* 867 * Use the map type specified by the user, or fall back to a default 868 * database type. 869 */ 870 if (delkey) { /* remove entry */ 871 if (optind + 1 > argc) 872 usage(argv[0]); 873 if (strcmp(delkey, "-") == 0) 874 exit(postmap_deletes(VSTREAM_IN, argv + optind, argc - optind, 875 dict_flags | DICT_FLAG_LOCK) == 0); 876 found = 0; 877 while (optind < argc) { 878 if ((path_name = split_at(argv[optind], ':')) != 0) { 879 found |= postmap_delete(argv[optind], path_name, delkey, 880 dict_flags | DICT_FLAG_LOCK); 881 } else { 882 found |= postmap_delete(var_db_type, argv[optind], delkey, 883 dict_flags | DICT_FLAG_LOCK); 884 } 885 optind++; 886 } 887 exit(found ? 0 : 1); 888 } else if (query) { /* query map(s) */ 889 if (optind + 1 > argc) 890 usage(argv[0]); 891 if (strcmp(query, "-") == 0) 892 exit(postmap_queries(VSTREAM_IN, argv + optind, argc - optind, 893 postmap_flags, dict_flags | DICT_FLAG_LOCK) == 0); 894 while (optind < argc) { 895 if ((path_name = split_at(argv[optind], ':')) != 0) { 896 found = postmap_query(argv[optind], path_name, query, 897 dict_flags | DICT_FLAG_LOCK); 898 } else { 899 found = postmap_query(var_db_type, argv[optind], query, 900 dict_flags | DICT_FLAG_LOCK); 901 } 902 if (found) 903 exit(0); 904 optind++; 905 } 906 exit(1); 907 } else if (sequence) { 908 while (optind < argc) { 909 if ((path_name = split_at(argv[optind], ':')) != 0) { 910 postmap_seq(argv[optind], path_name, 911 dict_flags | DICT_FLAG_LOCK); 912 } else { 913 postmap_seq(var_db_type, argv[optind], 914 dict_flags | DICT_FLAG_LOCK); 915 } 916 exit(0); 917 } 918 exit(1); 919 } else { /* create/update map(s) */ 920 if (optind + 1 > argc) 921 usage(argv[0]); 922 while (optind < argc) { 923 if ((path_name = split_at(argv[optind], ':')) != 0) { 924 postmap(argv[optind], path_name, postmap_flags, 925 open_flags, dict_flags); 926 } else { 927 postmap(var_db_type, argv[optind], postmap_flags, 928 open_flags, dict_flags); 929 } 930 optind++; 931 } 932 exit(0); 933 } 934 } 935