1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 41 #if 0 42 #endif 43 44 #include "lp.cdefs.h" /* A cross-platform version of <sys/cdefs.h> */ 45 #include <errno.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <unistd.h> 50 51 #include <sys/param.h> /* required for lp.h, but not used here */ 52 #include <sys/dirent.h> /* ditto */ 53 #include "lp.h" 54 #include "lp.local.h" 55 #include "pathnames.h" 56 57 /* 58 * Routines and data used in processing the printcap file. 59 */ 60 static char *printcapdb[] = { __DECONST(char *, _PATH_PRINTCAP), NULL }; 61 62 static char *capdb_canonical_name(const char *_bp); 63 static int capdb_getaltlog(char *_bp, const char *_shrt, 64 const char *_lng); 65 static int capdb_getaltnum(char *_bp, const char *_shrt, 66 const char *_lng, long _dflt, long *_result); 67 static int capdb_getaltstr(char *_bp, const char *_shrt, 68 const char *lng, const char *_dflt, char **_result); 69 static int getprintcap_int(char *_bp, struct printer *_pp); 70 71 /* 72 * Change the name of the printcap file. Used by chkprintcap(8), 73 * but could be used by other members of the suite with appropriate 74 * security measures. 75 */ 76 void 77 setprintcap(char *newfile) 78 { 79 printcapdb[0] = newfile; 80 } 81 82 /* 83 * Read the printcap database for printer `printer' into the 84 * struct printer pointed by `pp'. Return values are as for 85 * cgetent(3): -1 means we could not find what we wanted, -2 86 * means a system error occurred (and errno is set), -3 if a 87 * reference (`tc=') loop was detected, and 0 means success. 88 * 89 * Copied from lpr; should add additional capabilities as they 90 * are required by the other programs in the suite so that 91 * printcap-reading is consistent across the entire family. 92 */ 93 int 94 getprintcap(const char *printer, struct printer *pp) 95 { 96 int status; 97 char *bp; 98 99 if ((status = cgetent(&bp, printcapdb, printer)) < 0) 100 return status; 101 status = getprintcap_int(bp, pp); 102 free(bp); 103 return status; 104 } 105 106 /* 107 * Map the status values returned by cgetfirst/cgetnext into those 108 * used by cgetent, returning truth if there are more records to 109 * examine. This points out what is arguably a bug in the cget* 110 * interface (or at least a nasty wart). 111 */ 112 static int 113 firstnextmap(int *status) 114 { 115 switch (*status) { 116 case 0: 117 return 0; 118 case 1: 119 *status = 0; 120 return 1; 121 case 2: 122 *status = 1; 123 return 1; 124 case -1: 125 *status = -2; 126 return 0; 127 case -2: 128 *status = -3; 129 return 1; 130 default: 131 return 0; 132 } 133 } 134 135 /* 136 * Scan through the database of printers using cgetfirst/cgetnext. 137 * Return false of error or end-of-database; else true. 138 */ 139 int 140 firstprinter(struct printer *pp, int *error) 141 { 142 int status; 143 char *bp; 144 145 init_printer(pp); 146 status = cgetfirst(&bp, printcapdb); 147 if (firstnextmap(&status) == 0) { 148 if (error) 149 *error = status; 150 return 0; 151 } 152 if (error) 153 *error = status; 154 status = getprintcap_int(bp, pp); 155 free(bp); 156 if (error && status) 157 *error = status; 158 return 1; 159 } 160 161 int 162 nextprinter(struct printer *pp, int *error) 163 { 164 int status; 165 char *bp; 166 167 free_printer(pp); 168 status = cgetnext(&bp, printcapdb); 169 if (firstnextmap(&status) == 0) { 170 if (error) 171 *error = status; 172 return 0; 173 } 174 if (error) 175 *error = status; 176 status = getprintcap_int(bp, pp); 177 free(bp); 178 if (error && status) 179 *error = status; 180 return 1; 181 } 182 183 void 184 lastprinter(void) 185 { 186 cgetclose(); 187 } 188 189 /* 190 * This must match the order of declaration of enum filter in lp.h. 191 */ 192 static const char *filters[] = { 193 "cf", "df", "gf", "if", "nf", "of", "rf", "tf", "vf" 194 }; 195 196 static const char *longfilters[] = { 197 "filt.cifplot", "filt.dvi", "filt.plot", "filt.input", "filt.ditroff", 198 "filt.output", "filt.fortran", "filt.troff", "filt.raster" 199 }; 200 201 /* 202 * Internal routine for both getprintcap() and nextprinter(). 203 * Actually parse the printcap entry using cget* functions. 204 * Also attempt to figure out the canonical name of the printer 205 * and store a malloced copy of it in pp->printer. 206 */ 207 static int 208 getprintcap_int(char *bp, struct printer *pp) 209 { 210 enum lpd_filters filt; 211 char *rp_name; 212 int error; 213 214 if ((pp->printer = capdb_canonical_name(bp)) == NULL) 215 return PCAPERR_OSERR; 216 217 #define CHK(x) do {if ((x) == PCAPERR_OSERR) return PCAPERR_OSERR;}while(0) 218 CHK(capdb_getaltstr(bp, "af", "acct.file", 0, &pp->acct_file)); 219 CHK(capdb_getaltnum(bp, "br", "tty.rate", 0, &pp->baud_rate)); 220 CHK(capdb_getaltnum(bp, "ct", "remote.timeout", DEFTIMEOUT, 221 &pp->conn_timeout)); 222 CHK(capdb_getaltnum(bp, "du", "daemon.user", DEFUID, 223 &pp->daemon_user)); 224 CHK(capdb_getaltstr(bp, "ff", "job.formfeed", DEFFF, &pp->form_feed)); 225 CHK(capdb_getaltstr(bp, "lf", "spool.log", _PATH_CONSOLE, 226 &pp->log_file)); 227 CHK(capdb_getaltstr(bp, "lo", "spool.lock", DEFLOCK, &pp->lock_file)); 228 CHK(capdb_getaltstr(bp, "lp", "tty.device", _PATH_DEFDEVLP, &pp->lp)); 229 CHK(capdb_getaltnum(bp, "mc", "max.copies", DEFMAXCOPIES, 230 &pp->max_copies)); 231 CHK(capdb_getaltstr(bp, "ms", "tty.mode", 0, &pp->mode_set)); 232 CHK(capdb_getaltnum(bp, "mx", "max.blocks", DEFMX, &pp->max_blocks)); 233 CHK(capdb_getaltnum(bp, "pc", "acct.price", 0, &pp->price100)); 234 CHK(capdb_getaltnum(bp, "pl", "page.length", DEFLENGTH, 235 &pp->page_length)); 236 CHK(capdb_getaltnum(bp, "pw", "page.width", DEFWIDTH, 237 &pp->page_width)); 238 CHK(capdb_getaltnum(bp, "px", "page.pwidth", 0, &pp->page_pwidth)); 239 CHK(capdb_getaltnum(bp, "py", "page.plength", 0, &pp->page_plength)); 240 CHK(capdb_getaltstr(bp, "rg", "daemon.restrictgrp", 0, 241 &pp->restrict_grp)); 242 CHK(capdb_getaltstr(bp, "rm", "remote.host", 0, &pp->remote_host)); 243 CHK(capdb_getaltstr(bp, "rp", "remote.queue", DEFLP, 244 &pp->remote_queue)); 245 CHK(capdb_getaltstr(bp, "sd", "spool.dir", _PATH_DEFSPOOL, 246 &pp->spool_dir)); 247 CHK(capdb_getaltstr(bp, "sr", "stat.recv", 0, &pp->stat_recv)); 248 CHK(capdb_getaltstr(bp, "ss", "stat.send", 0, &pp->stat_send)); 249 CHK(capdb_getaltstr(bp, "st", "spool.status", DEFSTAT, 250 &pp->status_file)); 251 CHK(capdb_getaltstr(bp, "tr", "job.trailer", 0, &pp->trailer)); 252 253 pp->resend_copies = capdb_getaltlog(bp, "rc", "remote.resend_copies"); 254 pp->restricted = capdb_getaltlog(bp, "rs", "daemon.restricted"); 255 pp->short_banner = capdb_getaltlog(bp, "sb", "banner.short"); 256 pp->no_copies = capdb_getaltlog(bp, "sc", "job.no_copies"); 257 pp->no_formfeed = capdb_getaltlog(bp, "sf", "job.no_formfeed"); 258 pp->no_header = capdb_getaltlog(bp, "sh", "banner.disable"); 259 pp->header_last = capdb_getaltlog(bp, "hl", "banner.last"); 260 pp->rw = capdb_getaltlog(bp, "rw", "tty.rw"); 261 pp->tof = !capdb_getaltlog(bp, "fo", "job.topofform"); 262 263 /* 264 * Decide if the remote printer name matches the local printer name. 265 * If no name is given then we assume they mean them to match. 266 * If a name is given see if the rp_name is one of the names for 267 * this printer. 268 */ 269 pp->rp_matches_local = 1; 270 CHK((error = capdb_getaltstr(bp, "rp", "remote.queue", 0, &rp_name))); 271 if (error != PCAPERR_NOTFOUND && rp_name != NULL) { 272 if (cgetmatch(bp,rp_name) != 0) 273 pp->rp_matches_local = 0; 274 free(rp_name); 275 } 276 277 /* 278 * Filters: 279 */ 280 for (filt = 0; filt < LPF_COUNT; filt++) { 281 CHK(capdb_getaltstr(bp, filters[filt], longfilters[filt], 0, 282 &pp->filters[filt])); 283 } 284 285 return 0; 286 } 287 288 /* 289 * Decode the error codes returned by cgetent() using the names we 290 * made up for them from "lp.h". 291 * This would have been much better done with Common Error, >sigh<. 292 * Perhaps this can be fixed in the next incarnation of cget*. 293 */ 294 const char * 295 pcaperr(int error) 296 { 297 switch(error) { 298 case PCAPERR_TCOPEN: 299 return "unresolved tc= expansion"; 300 case PCAPERR_SUCCESS: 301 return "no error"; 302 case PCAPERR_NOTFOUND: 303 return "printer not found"; 304 case PCAPERR_OSERR: 305 return strerror(errno); 306 case PCAPERR_TCLOOP: 307 return "loop detected in tc= expansion"; 308 default: 309 return "unknown printcap error"; 310 } 311 } 312 313 /* 314 * Initialize a `struct printer' to contain values harmless to 315 * the other routines in liblpr. 316 */ 317 void 318 init_printer(struct printer *pp) 319 { 320 static struct printer zero; 321 *pp = zero; 322 } 323 324 /* 325 * Free the dynamically-allocated strings in a `struct printer'. 326 * Idempotent. 327 */ 328 void 329 free_printer(struct printer *pp) 330 { 331 enum lpd_filters filt; 332 #define cfree(x) do { if (x) free(x); } while(0) 333 cfree(pp->printer); 334 cfree(pp->acct_file); 335 for (filt = 0; filt < LPF_COUNT; filt++) 336 cfree(pp->filters[filt]); 337 cfree(pp->form_feed); 338 cfree(pp->log_file); 339 cfree(pp->lock_file); 340 cfree(pp->lp); 341 cfree(pp->restrict_grp); 342 cfree(pp->remote_host); 343 cfree(pp->remote_queue); 344 cfree(pp->spool_dir); 345 cfree(pp->stat_recv); 346 cfree(pp->stat_send); 347 cfree(pp->status_file); 348 cfree(pp->trailer); 349 cfree(pp->mode_set); 350 351 init_printer(pp); 352 } 353 354 355 /* 356 * The following routines are part of what would be a sensible library 357 * interface to capability databases. Maybe someday this will become 358 * the default. 359 */ 360 361 /* 362 * It provides similar functionality to cgetstr(), 363 * except that it provides for both a long and a short 364 * capability name and allows for a default to be specified. 365 */ 366 static int 367 capdb_getaltstr(char *bp, const char *shrt, const char *lng, 368 const char *dflt, char **result) 369 { 370 int status; 371 372 status = cgetstr(bp, lng, result); 373 if (status >= 0 || status == PCAPERR_OSERR) 374 return status; 375 status = cgetstr(bp, shrt, result); 376 if (status >= 0 || status == PCAPERR_OSERR) 377 return status; 378 if (dflt) { 379 *result = strdup(dflt); 380 if (*result == NULL) 381 return PCAPERR_OSERR; 382 return strlen(*result); 383 } 384 return PCAPERR_NOTFOUND; 385 } 386 387 /* 388 * The same, only for integers. 389 */ 390 static int 391 capdb_getaltnum(char *bp, const char *shrt, const char *lng, long dflt, 392 long *result) 393 { 394 int status; 395 396 status = cgetnum(bp, lng, result); 397 if (status >= 0) 398 return status; 399 status = cgetnum(bp, shrt, result); 400 if (status >= 0) 401 return status; 402 *result = dflt; 403 return 0; 404 } 405 406 /* 407 * Likewise for logical values. There's no need for a default parameter 408 * because the default is always false. 409 */ 410 static int 411 capdb_getaltlog(char *bp, const char *shrt, const char *lng) 412 { 413 if (cgetcap(bp, lng, ':')) 414 return 1; 415 if (cgetcap(bp, shrt, ':')) 416 return 1; 417 return 0; 418 } 419 420 /* 421 * Also should be a part of a better cget* library. 422 * Given a capdb entry, attempt to figure out what its canonical name 423 * is, and return a malloced copy of it. The canonical name is 424 * considered to be the first one listed. 425 */ 426 static char * 427 capdb_canonical_name(const char *bp) 428 { 429 char *retval; 430 const char *nameend; 431 432 nameend = strpbrk(bp, "|:"); 433 if (nameend == NULL) 434 nameend = bp + 1; 435 if ((retval = malloc(nameend - bp + 1)) != NULL) { 436 retval[0] = '\0'; 437 strncat(retval, bp, nameend - bp); 438 } 439 return retval; 440 } 441 442 443