1 /* $NetBSD: cleanup_init.c,v 1.7 2022/10/08 16:12:45 christos Exp $ */ 2 3 /*++ 4 /* NAME 5 /* cleanup_init 3 6 /* SUMMARY 7 /* cleanup callable interface, initializations 8 /* SYNOPSIS 9 /* #include "cleanup.h" 10 /* 11 /* CONFIG_BOOL_TABLE cleanup_bool_table[]; 12 /* 13 /* CONFIG_INT_TABLE cleanup_int_table[]; 14 /* 15 /* CONFIG_BOOL_TABLE cleanup_bool_table[]; 16 /* 17 /* CONFIG_STR_TABLE cleanup_str_table[]; 18 /* 19 /* CONFIG_TIME_TABLE cleanup_time_table[]; 20 /* 21 /* void cleanup_pre_jail(service_name, argv) 22 /* char *service_name; 23 /* char **argv; 24 /* 25 /* void cleanup_post_jail(service_name, argv) 26 /* char *service_name; 27 /* char **argv; 28 /* 29 /* char *cleanup_path; 30 /* VSTRING *cleanup_trace_path; 31 /* 32 /* void cleanup_all() 33 /* 34 /* void cleanup_sig(sigval) 35 /* int sigval; 36 /* DESCRIPTION 37 /* This module implements a callable interface to the cleanup service 38 /* for one-time initializations that must be done before any message 39 /* processing can take place. 40 /* 41 /* cleanup_{bool,int,str,time}_table[] specify configuration 42 /* parameters that must be initialized before calling any functions 43 /* in this module. These tables satisfy the interface as specified in 44 /* single_service(3). 45 /* 46 /* cleanup_pre_jail() and cleanup_post_jail() perform mandatory 47 /* initializations before and after the process enters the optional 48 /* chroot jail. These functions satisfy the interface as specified 49 /* in single_service(3). 50 /* 51 /* cleanup_path is either a null pointer or it is the name of a queue 52 /* file that currently is being written. This information is used 53 /* by cleanup_all() to remove incomplete files after a fatal error, 54 /* or by cleanup_sig() after arrival of a SIGTERM signal. 55 /* 56 /* cleanup_trace_path is either a null pointer or the pathname of a 57 /* trace logfile with DSN SUCCESS notifications. This information is 58 /* used to remove a trace file when the mail transaction is canceled. 59 /* 60 /* cleanup_all() must be called in case of fatal error, in order 61 /* to remove an incomplete queue file. 62 /* 63 /* cleanup_sig() must be called in case of SIGTERM, in order 64 /* to remove an incomplete queue file. 65 /* DIAGNOSTICS 66 /* Problems and transactions are logged to \fBsyslogd\fR(8) 67 /* or \fBpostlogd\fR(8). 68 /* SEE ALSO 69 /* cleanup_api(3) cleanup callable interface, message processing 70 /* LICENSE 71 /* .ad 72 /* .fi 73 /* The Secure Mailer license must be distributed with this software. 74 /* AUTHOR(S) 75 /* Wietse Venema 76 /* IBM T.J. Watson Research 77 /* P.O. Box 704 78 /* Yorktown Heights, NY 10598, USA 79 /* 80 /* Wietse Venema 81 /* Google, Inc. 82 /* 111 8th Avenue 83 /* New York, NY 10011, USA 84 /*--*/ 85 86 /* System library. */ 87 88 #include <sys_defs.h> 89 #include <signal.h> 90 #include <string.h> 91 92 /* Utility library. */ 93 94 #include <msg.h> 95 #include <iostuff.h> 96 #include <name_code.h> 97 #include <name_mask.h> 98 #include <stringops.h> 99 100 /* Global library. */ 101 102 #include <mail_addr.h> 103 #include <mail_params.h> 104 #include <mail_version.h> /* milter_macro_v */ 105 #include <ext_prop.h> 106 #include <flush_clnt.h> 107 #include <hfrom_format.h> 108 109 /* Application-specific. */ 110 111 #include "cleanup.h" 112 113 /* 114 * Global state: any queue files that we have open, so that the error 115 * handler can clean up in case of trouble. 116 */ 117 char *cleanup_path; /* queue file name */ 118 119 /* 120 * Another piece of global state: pathnames of partial bounce or trace 121 * logfiles that need to be cleaned up when the cleanup request is aborted. 122 */ 123 VSTRING *cleanup_trace_path; 124 125 /* 126 * Tunable parameters. 127 */ 128 int var_hopcount_limit; /* max mailer hop count */ 129 char *var_canonical_maps; /* common canonical maps */ 130 char *var_send_canon_maps; /* sender canonical maps */ 131 char *var_rcpt_canon_maps; /* recipient canonical maps */ 132 char *var_canon_classes; /* what to canonicalize */ 133 char *var_send_canon_classes; /* what sender to canonicalize */ 134 char *var_rcpt_canon_classes; /* what recipient to canonicalize */ 135 char *var_virt_alias_maps; /* virtual alias maps */ 136 char *var_masq_domains; /* masquerade domains */ 137 char *var_masq_exceptions; /* users not masqueraded */ 138 char *var_header_checks; /* primary header checks */ 139 char *var_mimehdr_checks; /* mime header checks */ 140 char *var_nesthdr_checks; /* nested header checks */ 141 char *var_body_checks; /* any body checks */ 142 int var_dup_filter_limit; /* recipient dup filter */ 143 char *var_empty_addr; /* destination of bounced bounces */ 144 int var_delay_warn_time; /* delay that triggers warning */ 145 char *var_prop_extension; /* propagate unmatched extension */ 146 char *var_always_bcc; /* big brother */ 147 char *var_rcpt_witheld; /* recipients not disclosed */ 148 bool var_canon_env_rcpt; /* canonicalize envelope recipient */ 149 char *var_masq_classes; /* what to masquerade */ 150 int var_qattr_count_limit; /* named attribute limit */ 151 int var_virt_recur_limit; /* maximum virtual alias recursion */ 152 int var_virt_expan_limit; /* maximum virtual alias expansion */ 153 int var_body_check_len; /* when to stop body scan */ 154 char *var_send_bcc_maps; /* sender auto-bcc maps */ 155 char *var_rcpt_bcc_maps; /* recipient auto-bcc maps */ 156 char *var_remote_rwr_domain; /* header-only surrogate */ 157 char *var_msg_reject_chars; /* reject these characters */ 158 char *var_msg_strip_chars; /* strip these characters */ 159 int var_verp_bounce_off; /* don't verp the bounces */ 160 int var_milt_conn_time; /* milter connect/handshake timeout */ 161 int var_milt_cmd_time; /* milter command timeout */ 162 int var_milt_msg_time; /* milter content timeout */ 163 char *var_milt_protocol; /* Sendmail 8 milter protocol */ 164 char *var_milt_def_action; /* default milter action */ 165 char *var_milt_daemon_name; /* {daemon_name} macro value */ 166 char *var_milt_v; /* {v} macro value */ 167 char *var_milt_conn_macros; /* connect macros */ 168 char *var_milt_helo_macros; /* HELO macros */ 169 char *var_milt_mail_macros; /* MAIL FROM macros */ 170 char *var_milt_rcpt_macros; /* RCPT TO macros */ 171 char *var_milt_data_macros; /* DATA macros */ 172 char *var_milt_eoh_macros; /* end-of-header macros */ 173 char *var_milt_eod_macros; /* end-of-data macros */ 174 char *var_milt_unk_macros; /* unknown command macros */ 175 char *var_cleanup_milters; /* non-SMTP mail */ 176 char *var_milt_head_checks; /* post-Milter header checks */ 177 char *var_milt_macro_deflts; /* default macro settings */ 178 int var_auto_8bit_enc_hdr; /* auto-detect 8bit encoding header */ 179 int var_always_add_hdrs; /* always add missing headers */ 180 int var_virt_addrlen_limit; /* stop exponential growth */ 181 char *var_hfrom_format; /* header_from_format */ 182 183 const CONFIG_INT_TABLE cleanup_int_table[] = { 184 VAR_HOPCOUNT_LIMIT, DEF_HOPCOUNT_LIMIT, &var_hopcount_limit, 1, 0, 185 VAR_DUP_FILTER_LIMIT, DEF_DUP_FILTER_LIMIT, &var_dup_filter_limit, 0, 0, 186 VAR_QATTR_COUNT_LIMIT, DEF_QATTR_COUNT_LIMIT, &var_qattr_count_limit, 1, 0, 187 VAR_VIRT_RECUR_LIMIT, DEF_VIRT_RECUR_LIMIT, &var_virt_recur_limit, 1, 0, 188 VAR_VIRT_EXPAN_LIMIT, DEF_VIRT_EXPAN_LIMIT, &var_virt_expan_limit, 1, 0, 189 VAR_VIRT_ADDRLEN_LIMIT, DEF_VIRT_ADDRLEN_LIMIT, &var_virt_addrlen_limit, 1, 0, 190 VAR_BODY_CHECK_LEN, DEF_BODY_CHECK_LEN, &var_body_check_len, 0, 0, 191 0, 192 }; 193 194 const CONFIG_BOOL_TABLE cleanup_bool_table[] = { 195 VAR_VERP_BOUNCE_OFF, DEF_VERP_BOUNCE_OFF, &var_verp_bounce_off, 196 VAR_AUTO_8BIT_ENC_HDR, DEF_AUTO_8BIT_ENC_HDR, &var_auto_8bit_enc_hdr, 197 VAR_ALWAYS_ADD_HDRS, DEF_ALWAYS_ADD_HDRS, &var_always_add_hdrs, 198 0, 199 }; 200 201 const CONFIG_TIME_TABLE cleanup_time_table[] = { 202 VAR_DELAY_WARN_TIME, DEF_DELAY_WARN_TIME, &var_delay_warn_time, 0, 0, 203 VAR_MILT_CONN_TIME, DEF_MILT_CONN_TIME, &var_milt_conn_time, 1, 0, 204 VAR_MILT_CMD_TIME, DEF_MILT_CMD_TIME, &var_milt_cmd_time, 1, 0, 205 VAR_MILT_MSG_TIME, DEF_MILT_MSG_TIME, &var_milt_msg_time, 1, 0, 206 0, 207 }; 208 209 const CONFIG_STR_TABLE cleanup_str_table[] = { 210 VAR_CANONICAL_MAPS, DEF_CANONICAL_MAPS, &var_canonical_maps, 0, 0, 211 VAR_SEND_CANON_MAPS, DEF_SEND_CANON_MAPS, &var_send_canon_maps, 0, 0, 212 VAR_RCPT_CANON_MAPS, DEF_RCPT_CANON_MAPS, &var_rcpt_canon_maps, 0, 0, 213 VAR_CANON_CLASSES, DEF_CANON_CLASSES, &var_canon_classes, 1, 0, 214 VAR_SEND_CANON_CLASSES, DEF_SEND_CANON_CLASSES, &var_send_canon_classes, 1, 0, 215 VAR_RCPT_CANON_CLASSES, DEF_RCPT_CANON_CLASSES, &var_rcpt_canon_classes, 1, 0, 216 VAR_VIRT_ALIAS_MAPS, DEF_VIRT_ALIAS_MAPS, &var_virt_alias_maps, 0, 0, 217 VAR_MASQ_DOMAINS, DEF_MASQ_DOMAINS, &var_masq_domains, 0, 0, 218 VAR_EMPTY_ADDR, DEF_EMPTY_ADDR, &var_empty_addr, 1, 0, 219 VAR_MASQ_EXCEPTIONS, DEF_MASQ_EXCEPTIONS, &var_masq_exceptions, 0, 0, 220 VAR_HEADER_CHECKS, DEF_HEADER_CHECKS, &var_header_checks, 0, 0, 221 VAR_MIMEHDR_CHECKS, DEF_MIMEHDR_CHECKS, &var_mimehdr_checks, 0, 0, 222 VAR_NESTHDR_CHECKS, DEF_NESTHDR_CHECKS, &var_nesthdr_checks, 0, 0, 223 VAR_BODY_CHECKS, DEF_BODY_CHECKS, &var_body_checks, 0, 0, 224 VAR_PROP_EXTENSION, DEF_PROP_EXTENSION, &var_prop_extension, 0, 0, 225 VAR_ALWAYS_BCC, DEF_ALWAYS_BCC, &var_always_bcc, 0, 0, 226 VAR_RCPT_WITHELD, DEF_RCPT_WITHELD, &var_rcpt_witheld, 0, 0, 227 VAR_MASQ_CLASSES, DEF_MASQ_CLASSES, &var_masq_classes, 0, 0, 228 VAR_SEND_BCC_MAPS, DEF_SEND_BCC_MAPS, &var_send_bcc_maps, 0, 0, 229 VAR_RCPT_BCC_MAPS, DEF_RCPT_BCC_MAPS, &var_rcpt_bcc_maps, 0, 0, 230 VAR_REM_RWR_DOMAIN, DEF_REM_RWR_DOMAIN, &var_remote_rwr_domain, 0, 0, 231 VAR_MSG_REJECT_CHARS, DEF_MSG_REJECT_CHARS, &var_msg_reject_chars, 0, 0, 232 VAR_MSG_STRIP_CHARS, DEF_MSG_STRIP_CHARS, &var_msg_strip_chars, 0, 0, 233 VAR_MILT_PROTOCOL, DEF_MILT_PROTOCOL, &var_milt_protocol, 1, 0, 234 VAR_MILT_DEF_ACTION, DEF_MILT_DEF_ACTION, &var_milt_def_action, 1, 0, 235 VAR_MILT_DAEMON_NAME, DEF_MILT_DAEMON_NAME, &var_milt_daemon_name, 1, 0, 236 VAR_MILT_V, DEF_MILT_V, &var_milt_v, 1, 0, 237 VAR_MILT_CONN_MACROS, DEF_MILT_CONN_MACROS, &var_milt_conn_macros, 0, 0, 238 VAR_MILT_HELO_MACROS, DEF_MILT_HELO_MACROS, &var_milt_helo_macros, 0, 0, 239 VAR_MILT_MAIL_MACROS, DEF_MILT_MAIL_MACROS, &var_milt_mail_macros, 0, 0, 240 VAR_MILT_RCPT_MACROS, DEF_MILT_RCPT_MACROS, &var_milt_rcpt_macros, 0, 0, 241 VAR_MILT_DATA_MACROS, DEF_MILT_DATA_MACROS, &var_milt_data_macros, 0, 0, 242 VAR_MILT_EOH_MACROS, DEF_MILT_EOH_MACROS, &var_milt_eoh_macros, 0, 0, 243 VAR_MILT_EOD_MACROS, DEF_MILT_EOD_MACROS, &var_milt_eod_macros, 0, 0, 244 VAR_MILT_UNK_MACROS, DEF_MILT_UNK_MACROS, &var_milt_unk_macros, 0, 0, 245 VAR_CLEANUP_MILTERS, DEF_CLEANUP_MILTERS, &var_cleanup_milters, 0, 0, 246 VAR_MILT_HEAD_CHECKS, DEF_MILT_HEAD_CHECKS, &var_milt_head_checks, 0, 0, 247 VAR_MILT_MACRO_DEFLTS, DEF_MILT_MACRO_DEFLTS, &var_milt_macro_deflts, 0, 0, 248 VAR_HFROM_FORMAT, DEF_HFROM_FORMAT, &var_hfrom_format, 1, 0, 249 0, 250 }; 251 252 /* 253 * Mappings. 254 */ 255 MAPS *cleanup_comm_canon_maps; 256 MAPS *cleanup_send_canon_maps; 257 MAPS *cleanup_rcpt_canon_maps; 258 int cleanup_comm_canon_flags; 259 int cleanup_send_canon_flags; 260 int cleanup_rcpt_canon_flags; 261 MAPS *cleanup_header_checks; 262 MAPS *cleanup_mimehdr_checks; 263 MAPS *cleanup_nesthdr_checks; 264 MAPS *cleanup_body_checks; 265 MAPS *cleanup_virt_alias_maps; 266 ARGV *cleanup_masq_domains; 267 STRING_LIST *cleanup_masq_exceptions; 268 int cleanup_masq_flags; 269 MAPS *cleanup_send_bcc_maps; 270 MAPS *cleanup_rcpt_bcc_maps; 271 272 /* 273 * Character filters. 274 */ 275 VSTRING *cleanup_reject_chars; 276 VSTRING *cleanup_strip_chars; 277 278 /* 279 * Address extension propagation restrictions. 280 */ 281 int cleanup_ext_prop_mask; 282 283 /* 284 * Milter support. 285 */ 286 MILTERS *cleanup_milters; 287 288 /* 289 * From: header format. 290 */ 291 int cleanup_hfrom_format; 292 293 /* cleanup_all - callback for the runtime error handler */ 294 295 void cleanup_all(void) 296 { 297 cleanup_sig(0); 298 } 299 300 /* cleanup_sig - callback for the SIGTERM handler */ 301 302 void cleanup_sig(int sig) 303 { 304 305 /* 306 * msg_fatal() is safe against calling itself recursively, but signals 307 * need extra safety. 308 * 309 * XXX While running as a signal handler, can't ask the memory manager to 310 * release VSTRING storage. 311 */ 312 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) { 313 if (cleanup_trace_path) { 314 (void) REMOVE(vstring_str(cleanup_trace_path)); 315 cleanup_trace_path = 0; 316 } 317 if (cleanup_path) { 318 (void) REMOVE(cleanup_path); 319 cleanup_path = 0; 320 } 321 if (sig) 322 _exit(sig); 323 } 324 } 325 326 /* cleanup_pre_jail - initialize before entering the chroot jail */ 327 328 void cleanup_pre_jail(char *unused_name, char **unused_argv) 329 { 330 static const NAME_MASK send_canon_class_table[] = { 331 CANON_CLASS_ENV_FROM, CLEANUP_CANON_FLAG_ENV_FROM, 332 CANON_CLASS_HDR_FROM, CLEANUP_CANON_FLAG_HDR_FROM, 333 0, 334 }; 335 static const NAME_MASK rcpt_canon_class_table[] = { 336 CANON_CLASS_ENV_RCPT, CLEANUP_CANON_FLAG_ENV_RCPT, 337 CANON_CLASS_HDR_RCPT, CLEANUP_CANON_FLAG_HDR_RCPT, 338 0, 339 }; 340 static const NAME_MASK canon_class_table[] = { 341 CANON_CLASS_ENV_FROM, CLEANUP_CANON_FLAG_ENV_FROM, 342 CANON_CLASS_ENV_RCPT, CLEANUP_CANON_FLAG_ENV_RCPT, 343 CANON_CLASS_HDR_FROM, CLEANUP_CANON_FLAG_HDR_FROM, 344 CANON_CLASS_HDR_RCPT, CLEANUP_CANON_FLAG_HDR_RCPT, 345 0, 346 }; 347 static const NAME_MASK masq_class_table[] = { 348 MASQ_CLASS_ENV_FROM, CLEANUP_MASQ_FLAG_ENV_FROM, 349 MASQ_CLASS_ENV_RCPT, CLEANUP_MASQ_FLAG_ENV_RCPT, 350 MASQ_CLASS_HDR_FROM, CLEANUP_MASQ_FLAG_HDR_FROM, 351 MASQ_CLASS_HDR_RCPT, CLEANUP_MASQ_FLAG_HDR_RCPT, 352 0, 353 }; 354 355 if (*var_canonical_maps) 356 cleanup_comm_canon_maps = 357 maps_create(VAR_CANONICAL_MAPS, var_canonical_maps, 358 DICT_FLAG_LOCK | DICT_FLAG_FOLD_FIX 359 | DICT_FLAG_UTF8_REQUEST); 360 if (*var_send_canon_maps) 361 cleanup_send_canon_maps = 362 maps_create(VAR_SEND_CANON_MAPS, var_send_canon_maps, 363 DICT_FLAG_LOCK | DICT_FLAG_FOLD_FIX 364 | DICT_FLAG_UTF8_REQUEST); 365 if (*var_rcpt_canon_maps) 366 cleanup_rcpt_canon_maps = 367 maps_create(VAR_RCPT_CANON_MAPS, var_rcpt_canon_maps, 368 DICT_FLAG_LOCK | DICT_FLAG_FOLD_FIX 369 | DICT_FLAG_UTF8_REQUEST); 370 if (*var_virt_alias_maps) 371 cleanup_virt_alias_maps = maps_create(VAR_VIRT_ALIAS_MAPS, 372 var_virt_alias_maps, 373 DICT_FLAG_LOCK 374 | DICT_FLAG_FOLD_FIX 375 | DICT_FLAG_UTF8_REQUEST); 376 if (*var_canon_classes) 377 cleanup_comm_canon_flags = 378 name_mask(VAR_CANON_CLASSES, canon_class_table, 379 var_canon_classes); 380 if (*var_send_canon_classes) 381 cleanup_send_canon_flags = 382 name_mask(VAR_CANON_CLASSES, send_canon_class_table, 383 var_send_canon_classes); 384 if (*var_rcpt_canon_classes) 385 cleanup_rcpt_canon_flags = 386 name_mask(VAR_CANON_CLASSES, rcpt_canon_class_table, 387 var_rcpt_canon_classes); 388 if (*var_masq_domains) 389 cleanup_masq_domains = argv_split(var_masq_domains, CHARS_COMMA_SP); 390 if (*var_header_checks) 391 cleanup_header_checks = 392 maps_create(VAR_HEADER_CHECKS, var_header_checks, DICT_FLAG_LOCK); 393 if (*var_mimehdr_checks) 394 cleanup_mimehdr_checks = 395 maps_create(VAR_MIMEHDR_CHECKS, var_mimehdr_checks, DICT_FLAG_LOCK); 396 if (*var_nesthdr_checks) 397 cleanup_nesthdr_checks = 398 maps_create(VAR_NESTHDR_CHECKS, var_nesthdr_checks, DICT_FLAG_LOCK); 399 if (*var_body_checks) 400 cleanup_body_checks = 401 maps_create(VAR_BODY_CHECKS, var_body_checks, DICT_FLAG_LOCK); 402 if (*var_masq_exceptions) 403 cleanup_masq_exceptions = 404 string_list_init(VAR_MASQ_EXCEPTIONS, MATCH_FLAG_RETURN, 405 var_masq_exceptions); 406 if (*var_masq_classes) 407 cleanup_masq_flags = name_mask(VAR_MASQ_CLASSES, masq_class_table, 408 var_masq_classes); 409 if (*var_send_bcc_maps) 410 cleanup_send_bcc_maps = 411 maps_create(VAR_SEND_BCC_MAPS, var_send_bcc_maps, 412 DICT_FLAG_LOCK | DICT_FLAG_FOLD_FIX 413 | DICT_FLAG_UTF8_REQUEST); 414 if (*var_rcpt_bcc_maps) 415 cleanup_rcpt_bcc_maps = 416 maps_create(VAR_RCPT_BCC_MAPS, var_rcpt_bcc_maps, 417 DICT_FLAG_LOCK | DICT_FLAG_FOLD_FIX 418 | DICT_FLAG_UTF8_REQUEST); 419 if (*var_cleanup_milters) 420 cleanup_milters = milter_create(var_cleanup_milters, 421 var_milt_conn_time, 422 var_milt_cmd_time, 423 var_milt_msg_time, 424 var_milt_protocol, 425 var_milt_def_action, 426 var_milt_conn_macros, 427 var_milt_helo_macros, 428 var_milt_mail_macros, 429 var_milt_rcpt_macros, 430 var_milt_data_macros, 431 var_milt_eoh_macros, 432 var_milt_eod_macros, 433 var_milt_unk_macros, 434 var_milt_macro_deflts); 435 if (*var_milt_head_checks) 436 cleanup_milter_header_checks_init(); 437 438 flush_init(); 439 } 440 441 /* cleanup_post_jail - initialize after entering the chroot jail */ 442 443 void cleanup_post_jail(char *unused_name, char **unused_argv) 444 { 445 446 /* 447 * Optionally set the file size resource limit. XXX This limits the 448 * message content to somewhat less than requested, because the total 449 * queue file size also includes envelope information. Unless people set 450 * really low limit, the difference is going to matter only when a queue 451 * file has lots of recipients. 452 */ 453 if (ENFORCING_SIZE_LIMIT(var_message_limit)) 454 set_file_limit((off_t) var_message_limit); 455 456 /* 457 * Control how unmatched extensions are propagated. 458 */ 459 cleanup_ext_prop_mask = 460 ext_prop_mask(VAR_PROP_EXTENSION, var_prop_extension); 461 462 /* 463 * Setup the filters for characters that should be rejected, and for 464 * characters that should be removed. 465 */ 466 if (*var_msg_reject_chars) { 467 cleanup_reject_chars = vstring_alloc(strlen(var_msg_reject_chars)); 468 unescape(cleanup_reject_chars, var_msg_reject_chars); 469 } 470 if (*var_msg_strip_chars) { 471 cleanup_strip_chars = vstring_alloc(strlen(var_msg_strip_chars)); 472 unescape(cleanup_strip_chars, var_msg_strip_chars); 473 } 474 475 /* 476 * From: header formatting. 477 */ 478 cleanup_hfrom_format = hfrom_format_parse(VAR_HFROM_FORMAT, var_hfrom_format); 479 } 480