1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * From: @(#)common.c 8.5 (Berkeley) 4/28/95 39 * 40 * $FreeBSD: src/usr.sbin/lpr/common_source/printcap.c,v 1.6.2.3 2002/04/28 23:29:10 gad Exp $ 41 * $DragonFly: src/usr.sbin/lpr/common_source/printcap.c,v 1.3 2004/03/22 22:32:50 cpressey Exp $ 42 */ 43 44 #include <errno.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <unistd.h> 49 50 #include <sys/param.h> /* required for lp.h, but not used here */ 51 #include <sys/dirent.h> /* ditto */ 52 #include "lp.h" 53 #include "lp.local.h" 54 #include "pathnames.h" 55 56 /* 57 * Routines and data used in processing the printcap file. 58 */ 59 static char *printcapdb[2] = { _PATH_PRINTCAP, 0 }; /* list for cget* */ 60 61 static char *capdb_canonical_name(const char *_bp); 62 static int capdb_getaltlog(char *_bp, const char *_shrt, 63 const char *_lng); 64 static int capdb_getaltnum(char *_bp, const char *_shrt, 65 const char *_lng, long _dflt, long *_result); 66 static int capdb_getaltstr(char *_bp, const char *_shrt, 67 const char *lng, const char *_dflt, char **_result); 68 static int getprintcap_int(char *_bp, struct printer *_pp); 69 70 /* 71 * Change the name of the printcap file. Used by chkprintcap(8), 72 * but could be used by other members of the suite with appropriate 73 * security measures. 74 */ 75 void 76 setprintcap(char *newfile) 77 { 78 printcapdb[0] = newfile; 79 } 80 81 /* 82 * Read the printcap database for printer `printer' into the 83 * struct printer pointed by `pp'. Return values are as for 84 * cgetent(3): -1 means we could not find what we wanted, -2 85 * means a system error occurred (and errno is set), -3 if a 86 * reference (`tc=') loop was detected, and 0 means success. 87 * 88 * Copied from lpr; should add additional capabilities as they 89 * are required by the other programs in the suite so that 90 * printcap-reading is consistent across the entire family. 91 */ 92 int 93 getprintcap(const char *printer, struct printer *pp) 94 { 95 int status; 96 char *XXX; 97 char *bp; 98 99 /* 100 * A bug in the declaration of cgetent(3) means that we have 101 * to hide the constness of its third argument. 102 */ 103 XXX = (char *)printer; 104 if ((status = cgetent(&bp, printcapdb, XXX)) < 0) 105 return status; 106 status = getprintcap_int(bp, pp); 107 free(bp); 108 return status; 109 } 110 111 /* 112 * Map the status values returned by cgetfirst/cgetnext into those 113 * used by cgetent, returning truth if there are more records to 114 * examine. This points out what is arguably a bug in the cget* 115 * interface (or at least a nasty wart). 116 */ 117 static int 118 firstnextmap(int *status) 119 { 120 switch (*status) { 121 case 0: 122 return 0; 123 case 1: 124 *status = 0; 125 return 1; 126 case 2: 127 *status = 1; 128 return 1; 129 case -1: 130 *status = -2; 131 return 0; 132 case -2: 133 *status = -3; 134 return 1; 135 default: 136 return 0; 137 } 138 } 139 140 /* 141 * Scan through the database of printers using cgetfirst/cgetnext. 142 * Return false of error or end-of-database; else true. 143 */ 144 int 145 firstprinter(struct printer *pp, int *error) 146 { 147 int status; 148 char *bp; 149 150 init_printer(pp); 151 status = cgetfirst(&bp, printcapdb); 152 if (firstnextmap(&status) == 0) { 153 if (error) 154 *error = status; 155 return 0; 156 } 157 if (error) 158 *error = status; 159 status = getprintcap_int(bp, pp); 160 free(bp); 161 if (error && status) 162 *error = status; 163 return 1; 164 } 165 166 int 167 nextprinter(struct printer *pp, int *error) 168 { 169 int status; 170 char *bp; 171 172 free_printer(pp); 173 status = cgetnext(&bp, printcapdb); 174 if (firstnextmap(&status) == 0) { 175 if (error) 176 *error = status; 177 return 0; 178 } 179 if (error) 180 *error = status; 181 status = getprintcap_int(bp, pp); 182 free(bp); 183 if (error && status) 184 *error = status; 185 return 1; 186 } 187 188 void 189 lastprinter(void) 190 { 191 cgetclose(); 192 } 193 194 /* 195 * This must match the order of declaration of enum filter in lp.h. 196 */ 197 static const char *filters[] = { 198 "cf", "df", "gf", "if", "nf", "of", "rf", "tf", "vf" 199 }; 200 201 static const char *longfilters[] = { 202 "filt.cifplot", "filt.dvi", "filt.plot", "filt.input", "filt.ditroff", 203 "filt.output", "filt.fortran", "filt.troff", "filt.raster" 204 }; 205 206 /* 207 * Internal routine for both getprintcap() and nextprinter(). 208 * Actually parse the printcap entry using cget* functions. 209 * Also attempt to figure out the canonical name of the printer 210 * and store a malloced copy of it in pp->printer. 211 */ 212 static int 213 getprintcap_int(char *bp, struct printer *pp) 214 { 215 enum lpd_filters filt; 216 char *rp_name; 217 int error; 218 219 if ((pp->printer = capdb_canonical_name(bp)) == 0) 220 return PCAPERR_OSERR; 221 222 #define CHK(x) do {if ((x) == PCAPERR_OSERR) return PCAPERR_OSERR;}while(0) 223 CHK(capdb_getaltstr(bp, "af", "acct.file", 0, &pp->acct_file)); 224 CHK(capdb_getaltnum(bp, "br", "tty.rate", 0, &pp->baud_rate)); 225 CHK(capdb_getaltnum(bp, "ct", "remote.timeout", DEFTIMEOUT, 226 &pp->conn_timeout)); 227 CHK(capdb_getaltnum(bp, "du", "daemon.user", DEFUID, 228 &pp->daemon_user)); 229 CHK(capdb_getaltstr(bp, "ff", "job.formfeed", DEFFF, &pp->form_feed)); 230 CHK(capdb_getaltstr(bp, "lf", "spool.log", _PATH_CONSOLE, 231 &pp->log_file)); 232 CHK(capdb_getaltstr(bp, "lo", "spool.lock", DEFLOCK, &pp->lock_file)); 233 CHK(capdb_getaltstr(bp, "lp", "tty.device", _PATH_DEFDEVLP, &pp->lp)); 234 CHK(capdb_getaltnum(bp, "mc", "max.copies", DEFMAXCOPIES, 235 &pp->max_copies)); 236 CHK(capdb_getaltstr(bp, "ms", "tty.mode", 0, &pp->mode_set)); 237 CHK(capdb_getaltnum(bp, "mx", "max.blocks", DEFMX, &pp->max_blocks)); 238 CHK(capdb_getaltnum(bp, "pc", "acct.price", 0, &pp->price100)); 239 CHK(capdb_getaltnum(bp, "pl", "page.length", DEFLENGTH, 240 &pp->page_length)); 241 CHK(capdb_getaltnum(bp, "pw", "page.width", DEFWIDTH, 242 &pp->page_width)); 243 CHK(capdb_getaltnum(bp, "px", "page.pwidth", 0, &pp->page_pwidth)); 244 CHK(capdb_getaltnum(bp, "py", "page.plength", 0, &pp->page_plength)); 245 CHK(capdb_getaltstr(bp, "rg", "daemon.restrictgrp", 0, 246 &pp->restrict_grp)); 247 CHK(capdb_getaltstr(bp, "rm", "remote.host", 0, &pp->remote_host)); 248 CHK(capdb_getaltstr(bp, "rp", "remote.queue", DEFLP, 249 &pp->remote_queue)); 250 CHK(capdb_getaltstr(bp, "sd", "spool.dir", _PATH_DEFSPOOL, 251 &pp->spool_dir)); 252 CHK(capdb_getaltstr(bp, "sr", "stat.recv", 0, &pp->stat_recv)); 253 CHK(capdb_getaltstr(bp, "ss", "stat.send", 0, &pp->stat_send)); 254 CHK(capdb_getaltstr(bp, "st", "spool.status", DEFSTAT, 255 &pp->status_file)); 256 CHK(capdb_getaltstr(bp, "tr", "job.trailer", 0, &pp->trailer)); 257 258 pp->resend_copies = capdb_getaltlog(bp, "rc", "remote.resend_copies"); 259 pp->restricted = capdb_getaltlog(bp, "rs", "daemon.restricted"); 260 pp->short_banner = capdb_getaltlog(bp, "sb", "banner.short"); 261 pp->no_copies = capdb_getaltlog(bp, "sc", "job.no_copies"); 262 pp->no_formfeed = capdb_getaltlog(bp, "sf", "job.no_formfeed"); 263 pp->no_header = capdb_getaltlog(bp, "sh", "banner.disable"); 264 pp->header_last = capdb_getaltlog(bp, "hl", "banner.last"); 265 pp->rw = capdb_getaltlog(bp, "rw", "tty.rw"); 266 pp->tof = !capdb_getaltlog(bp, "fo", "job.topofform"); 267 268 /* 269 * Decide if the remote printer name matches the local printer name. 270 * If no name is given then we assume they mean them to match. 271 * If a name is given see if the rp_name is one of the names for 272 * this printer. 273 */ 274 pp->rp_matches_local = 1; 275 CHK((error = capdb_getaltstr(bp, "rp", "remote.queue", 0, &rp_name))); 276 if (error != PCAPERR_NOTFOUND && rp_name != NULL) { 277 if (cgetmatch(bp,rp_name) != 0) 278 pp->rp_matches_local = 0; 279 free(rp_name); 280 } 281 282 /* 283 * Filters: 284 */ 285 for (filt = 0; filt < LPF_COUNT; filt++) { 286 CHK(capdb_getaltstr(bp, filters[filt], longfilters[filt], 0, 287 &pp->filters[filt])); 288 } 289 290 return 0; 291 } 292 293 /* 294 * Decode the error codes returned by cgetent() using the names we 295 * made up for them from "lp.h". 296 * This would have been much better done with Common Error, >sigh<. 297 * Perhaps this can be fixed in the next incarnation of cget*. 298 */ 299 const char * 300 pcaperr(int error) 301 { 302 switch(error) { 303 case PCAPERR_TCOPEN: 304 return "unresolved tc= expansion"; 305 case PCAPERR_SUCCESS: 306 return "no error"; 307 case PCAPERR_NOTFOUND: 308 return "printer not found"; 309 case PCAPERR_OSERR: 310 return strerror(errno); 311 case PCAPERR_TCLOOP: 312 return "loop detected in tc= expansion"; 313 default: 314 return "unknown printcap error"; 315 } 316 } 317 318 /* 319 * Initialize a `struct printer' to contain values harmless to 320 * the other routines in liblpr. 321 */ 322 void 323 init_printer(struct printer *pp) 324 { 325 static struct printer zero; 326 *pp = zero; 327 } 328 329 /* 330 * Free the dynamically-allocated strings in a `struct printer'. 331 * Idempotent. 332 */ 333 void 334 free_printer(struct printer *pp) 335 { 336 enum lpd_filters filt; 337 #define cfree(x) do { if (x) free(x); } while(0) 338 cfree(pp->printer); 339 cfree(pp->acct_file); 340 for (filt = 0; filt < LPF_COUNT; filt++) 341 cfree(pp->filters[filt]); 342 cfree(pp->form_feed); 343 cfree(pp->log_file); 344 cfree(pp->lock_file); 345 cfree(pp->lp); 346 cfree(pp->restrict_grp); 347 cfree(pp->remote_host); 348 cfree(pp->remote_queue); 349 cfree(pp->spool_dir); 350 cfree(pp->stat_recv); 351 cfree(pp->stat_send); 352 cfree(pp->status_file); 353 cfree(pp->trailer); 354 cfree(pp->mode_set); 355 356 init_printer(pp); 357 } 358 359 /* 360 * The following routines are part of what would be a sensible library 361 * interface to capability databases. Maybe someday this will become 362 * the default. 363 */ 364 365 /* 366 * It provides similar functionality to cgetstr(), 367 * except that it provides for both a long and a short 368 * capability name and allows for a default to be specified. 369 */ 370 static int 371 capdb_getaltstr(char *bp, const char *shrt, const char *lng, 372 const char *dflt, char **result) 373 { 374 int status; 375 376 status = cgetstr(bp, (char *)/*XXX*/lng, result); 377 if (status >= 0 || status == PCAPERR_OSERR) 378 return status; 379 status = cgetstr(bp, (char *)/*XXX*/shrt, result); 380 if (status >= 0 || status == PCAPERR_OSERR) 381 return status; 382 if (dflt) { 383 *result = strdup(dflt); 384 if (*result == 0) 385 return PCAPERR_OSERR; 386 return strlen(*result); 387 } 388 return PCAPERR_NOTFOUND; 389 } 390 391 /* 392 * The same, only for integers. 393 */ 394 static int 395 capdb_getaltnum(char *bp, const char *shrt, const char *lng, long dflt, 396 long *result) 397 { 398 int status; 399 400 status = cgetnum(bp, (char *)/*XXX*/lng, result); 401 if (status >= 0) 402 return status; 403 status = cgetnum(bp, (char *)/*XXX*/shrt, result); 404 if (status >= 0) 405 return status; 406 *result = dflt; 407 return 0; 408 } 409 410 /* 411 * Likewise for logical values. There's no need for a default parameter 412 * because the default is always false. 413 */ 414 static int 415 capdb_getaltlog(char *bp, const char *shrt, const char *lng) 416 { 417 if (cgetcap(bp, (char *)/*XXX*/lng, ':')) 418 return 1; 419 if (cgetcap(bp, (char *)/*XXX*/shrt, ':')) 420 return 1; 421 return 0; 422 } 423 424 /* 425 * Also should be a part of a better cget* library. 426 * Given a capdb entry, attempt to figure out what its canonical name 427 * is, and return a malloced copy of it. The canonical name is 428 * considered to be the first one listed. 429 */ 430 static char * 431 capdb_canonical_name(const char *bp) 432 { 433 char *retval; 434 const char *nameend; 435 436 nameend = strpbrk(bp, "|:"); 437 if (nameend == 0) 438 nameend = bp + 1; 439 if ((retval = malloc(nameend - bp + 1)) != 0) { 440 retval[0] = '\0'; 441 strncat(retval, bp, nameend - bp); 442 } 443 return retval; 444 } 445 446 447