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 39 #if 0 40 #ifndef lint 41 static char sccsid[] = "@(#)printcap.c 8.2 (Berkeley) 4/28/95"; 42 #endif /* not lint */ 43 #endif 44 45 #include "lp.cdefs.h" /* A cross-platform version of <sys/cdefs.h> */ 46 __FBSDID("$FreeBSD$"); 47 48 #include <errno.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <unistd.h> 53 54 #include <sys/param.h> /* required for lp.h, but not used here */ 55 #include <sys/dirent.h> /* ditto */ 56 #include "lp.h" 57 #include "lp.local.h" 58 #include "pathnames.h" 59 60 /* 61 * Routines and data used in processing the printcap file. 62 */ 63 static char *printcapdb[2] = { _PATH_PRINTCAP, 0 }; /* list for cget* */ 64 65 static char *capdb_canonical_name(const char *_bp); 66 static int capdb_getaltlog(char *_bp, const char *_shrt, 67 const char *_lng); 68 static int capdb_getaltnum(char *_bp, const char *_shrt, 69 const char *_lng, long _dflt, long *_result); 70 static int capdb_getaltstr(char *_bp, const char *_shrt, 71 const char *lng, const char *_dflt, char **_result); 72 static int getprintcap_int(char *_bp, struct printer *_pp); 73 74 /* 75 * Change the name of the printcap file. Used by chkprintcap(8), 76 * but could be used by other members of the suite with appropriate 77 * security measures. 78 */ 79 void 80 setprintcap(char *newfile) 81 { 82 printcapdb[0] = newfile; 83 } 84 85 /* 86 * Read the printcap database for printer `printer' into the 87 * struct printer pointed by `pp'. Return values are as for 88 * cgetent(3): -1 means we could not find what we wanted, -2 89 * means a system error occurred (and errno is set), -3 if a 90 * reference (`tc=') loop was detected, and 0 means success. 91 * 92 * Copied from lpr; should add additional capabilities as they 93 * are required by the other programs in the suite so that 94 * printcap-reading is consistent across the entire family. 95 */ 96 int 97 getprintcap(const char *printer, struct printer *pp) 98 { 99 int status; 100 char *XXX; 101 char *bp; 102 103 /* 104 * A bug in the declaration of cgetent(3) means that we have 105 * to hide the constness of its third argument. 106 */ 107 XXX = (char *)printer; 108 if ((status = cgetent(&bp, printcapdb, XXX)) < 0) 109 return status; 110 status = getprintcap_int(bp, pp); 111 free(bp); 112 return status; 113 } 114 115 /* 116 * Map the status values returned by cgetfirst/cgetnext into those 117 * used by cgetent, returning truth if there are more records to 118 * examine. This points out what is arguably a bug in the cget* 119 * interface (or at least a nasty wart). 120 */ 121 static int 122 firstnextmap(int *status) 123 { 124 switch (*status) { 125 case 0: 126 return 0; 127 case 1: 128 *status = 0; 129 return 1; 130 case 2: 131 *status = 1; 132 return 1; 133 case -1: 134 *status = -2; 135 return 0; 136 case -2: 137 *status = -3; 138 return 1; 139 default: 140 return 0; 141 } 142 } 143 144 /* 145 * Scan through the database of printers using cgetfirst/cgetnext. 146 * Return false of error or end-of-database; else true. 147 */ 148 int 149 firstprinter(struct printer *pp, int *error) 150 { 151 int status; 152 char *bp; 153 154 init_printer(pp); 155 status = cgetfirst(&bp, printcapdb); 156 if (firstnextmap(&status) == 0) { 157 if (error) 158 *error = status; 159 return 0; 160 } 161 if (error) 162 *error = status; 163 status = getprintcap_int(bp, pp); 164 free(bp); 165 if (error && status) 166 *error = status; 167 return 1; 168 } 169 170 int 171 nextprinter(struct printer *pp, int *error) 172 { 173 int status; 174 char *bp; 175 176 free_printer(pp); 177 status = cgetnext(&bp, printcapdb); 178 if (firstnextmap(&status) == 0) { 179 if (error) 180 *error = status; 181 return 0; 182 } 183 if (error) 184 *error = status; 185 status = getprintcap_int(bp, pp); 186 free(bp); 187 if (error && status) 188 *error = status; 189 return 1; 190 } 191 192 void 193 lastprinter(void) 194 { 195 cgetclose(); 196 } 197 198 /* 199 * This must match the order of declaration of enum filter in lp.h. 200 */ 201 static const char *filters[] = { 202 "cf", "df", "gf", "if", "nf", "of", "rf", "tf", "vf" 203 }; 204 205 static const char *longfilters[] = { 206 "filt.cifplot", "filt.dvi", "filt.plot", "filt.input", "filt.ditroff", 207 "filt.output", "filt.fortran", "filt.troff", "filt.raster" 208 }; 209 210 /* 211 * Internal routine for both getprintcap() and nextprinter(). 212 * Actually parse the printcap entry using cget* functions. 213 * Also attempt to figure out the canonical name of the printer 214 * and store a malloced copy of it in pp->printer. 215 */ 216 static int 217 getprintcap_int(char *bp, struct printer *pp) 218 { 219 enum lpd_filters filt; 220 char *rp_name; 221 int error; 222 223 if ((pp->printer = capdb_canonical_name(bp)) == NULL) 224 return PCAPERR_OSERR; 225 226 #define CHK(x) do {if ((x) == PCAPERR_OSERR) return PCAPERR_OSERR;}while(0) 227 CHK(capdb_getaltstr(bp, "af", "acct.file", 0, &pp->acct_file)); 228 CHK(capdb_getaltnum(bp, "br", "tty.rate", 0, &pp->baud_rate)); 229 CHK(capdb_getaltnum(bp, "ct", "remote.timeout", DEFTIMEOUT, 230 &pp->conn_timeout)); 231 CHK(capdb_getaltnum(bp, "du", "daemon.user", DEFUID, 232 &pp->daemon_user)); 233 CHK(capdb_getaltstr(bp, "ff", "job.formfeed", DEFFF, &pp->form_feed)); 234 CHK(capdb_getaltstr(bp, "lf", "spool.log", _PATH_CONSOLE, 235 &pp->log_file)); 236 CHK(capdb_getaltstr(bp, "lo", "spool.lock", DEFLOCK, &pp->lock_file)); 237 CHK(capdb_getaltstr(bp, "lp", "tty.device", _PATH_DEFDEVLP, &pp->lp)); 238 CHK(capdb_getaltnum(bp, "mc", "max.copies", DEFMAXCOPIES, 239 &pp->max_copies)); 240 CHK(capdb_getaltstr(bp, "ms", "tty.mode", 0, &pp->mode_set)); 241 CHK(capdb_getaltnum(bp, "mx", "max.blocks", DEFMX, &pp->max_blocks)); 242 CHK(capdb_getaltnum(bp, "pc", "acct.price", 0, &pp->price100)); 243 CHK(capdb_getaltnum(bp, "pl", "page.length", DEFLENGTH, 244 &pp->page_length)); 245 CHK(capdb_getaltnum(bp, "pw", "page.width", DEFWIDTH, 246 &pp->page_width)); 247 CHK(capdb_getaltnum(bp, "px", "page.pwidth", 0, &pp->page_pwidth)); 248 CHK(capdb_getaltnum(bp, "py", "page.plength", 0, &pp->page_plength)); 249 CHK(capdb_getaltstr(bp, "rg", "daemon.restrictgrp", 0, 250 &pp->restrict_grp)); 251 CHK(capdb_getaltstr(bp, "rm", "remote.host", 0, &pp->remote_host)); 252 CHK(capdb_getaltstr(bp, "rp", "remote.queue", DEFLP, 253 &pp->remote_queue)); 254 CHK(capdb_getaltstr(bp, "sd", "spool.dir", _PATH_DEFSPOOL, 255 &pp->spool_dir)); 256 CHK(capdb_getaltstr(bp, "sr", "stat.recv", 0, &pp->stat_recv)); 257 CHK(capdb_getaltstr(bp, "ss", "stat.send", 0, &pp->stat_send)); 258 CHK(capdb_getaltstr(bp, "st", "spool.status", DEFSTAT, 259 &pp->status_file)); 260 CHK(capdb_getaltstr(bp, "tr", "job.trailer", 0, &pp->trailer)); 261 262 pp->resend_copies = capdb_getaltlog(bp, "rc", "remote.resend_copies"); 263 pp->restricted = capdb_getaltlog(bp, "rs", "daemon.restricted"); 264 pp->short_banner = capdb_getaltlog(bp, "sb", "banner.short"); 265 pp->no_copies = capdb_getaltlog(bp, "sc", "job.no_copies"); 266 pp->no_formfeed = capdb_getaltlog(bp, "sf", "job.no_formfeed"); 267 pp->no_header = capdb_getaltlog(bp, "sh", "banner.disable"); 268 pp->header_last = capdb_getaltlog(bp, "hl", "banner.last"); 269 pp->rw = capdb_getaltlog(bp, "rw", "tty.rw"); 270 pp->tof = !capdb_getaltlog(bp, "fo", "job.topofform"); 271 272 /* 273 * Decide if the remote printer name matches the local printer name. 274 * If no name is given then we assume they mean them to match. 275 * If a name is given see if the rp_name is one of the names for 276 * this printer. 277 */ 278 pp->rp_matches_local = 1; 279 CHK((error = capdb_getaltstr(bp, "rp", "remote.queue", 0, &rp_name))); 280 if (error != PCAPERR_NOTFOUND && rp_name != NULL) { 281 if (cgetmatch(bp,rp_name) != 0) 282 pp->rp_matches_local = 0; 283 free(rp_name); 284 } 285 286 /* 287 * Filters: 288 */ 289 for (filt = 0; filt < LPF_COUNT; filt++) { 290 CHK(capdb_getaltstr(bp, filters[filt], longfilters[filt], 0, 291 &pp->filters[filt])); 292 } 293 294 return 0; 295 } 296 297 /* 298 * Decode the error codes returned by cgetent() using the names we 299 * made up for them from "lp.h". 300 * This would have been much better done with Common Error, >sigh<. 301 * Perhaps this can be fixed in the next incarnation of cget*. 302 */ 303 const char * 304 pcaperr(int error) 305 { 306 switch(error) { 307 case PCAPERR_TCOPEN: 308 return "unresolved tc= expansion"; 309 case PCAPERR_SUCCESS: 310 return "no error"; 311 case PCAPERR_NOTFOUND: 312 return "printer not found"; 313 case PCAPERR_OSERR: 314 return strerror(errno); 315 case PCAPERR_TCLOOP: 316 return "loop detected in tc= expansion"; 317 default: 318 return "unknown printcap error"; 319 } 320 } 321 322 /* 323 * Initialize a `struct printer' to contain values harmless to 324 * the other routines in liblpr. 325 */ 326 void 327 init_printer(struct printer *pp) 328 { 329 static struct printer zero; 330 *pp = zero; 331 } 332 333 /* 334 * Free the dynamically-allocated strings in a `struct printer'. 335 * Idempotent. 336 */ 337 void 338 free_printer(struct printer *pp) 339 { 340 enum lpd_filters filt; 341 #define cfree(x) do { if (x) free(x); } while(0) 342 cfree(pp->printer); 343 cfree(pp->acct_file); 344 for (filt = 0; filt < LPF_COUNT; filt++) 345 cfree(pp->filters[filt]); 346 cfree(pp->form_feed); 347 cfree(pp->log_file); 348 cfree(pp->lock_file); 349 cfree(pp->lp); 350 cfree(pp->restrict_grp); 351 cfree(pp->remote_host); 352 cfree(pp->remote_queue); 353 cfree(pp->spool_dir); 354 cfree(pp->stat_recv); 355 cfree(pp->stat_send); 356 cfree(pp->status_file); 357 cfree(pp->trailer); 358 cfree(pp->mode_set); 359 360 init_printer(pp); 361 } 362 363 364 /* 365 * The following routines are part of what would be a sensible library 366 * interface to capability databases. Maybe someday this will become 367 * the default. 368 */ 369 370 /* 371 * It provides similar functionality to cgetstr(), 372 * except that it provides for both a long and a short 373 * capability name and allows for a default to be specified. 374 */ 375 static int 376 capdb_getaltstr(char *bp, const char *shrt, const char *lng, 377 const char *dflt, char **result) 378 { 379 int status; 380 381 status = cgetstr(bp, (char *)/*XXX*/lng, result); 382 if (status >= 0 || status == PCAPERR_OSERR) 383 return status; 384 status = cgetstr(bp, (char *)/*XXX*/shrt, result); 385 if (status >= 0 || status == PCAPERR_OSERR) 386 return status; 387 if (dflt) { 388 *result = strdup(dflt); 389 if (*result == NULL) 390 return PCAPERR_OSERR; 391 return strlen(*result); 392 } 393 return PCAPERR_NOTFOUND; 394 } 395 396 /* 397 * The same, only for integers. 398 */ 399 static int 400 capdb_getaltnum(char *bp, const char *shrt, const char *lng, long dflt, 401 long *result) 402 { 403 int status; 404 405 status = cgetnum(bp, (char *)/*XXX*/lng, result); 406 if (status >= 0) 407 return status; 408 status = cgetnum(bp, (char *)/*XXX*/shrt, result); 409 if (status >= 0) 410 return status; 411 *result = dflt; 412 return 0; 413 } 414 415 /* 416 * Likewise for logical values. There's no need for a default parameter 417 * because the default is always false. 418 */ 419 static int 420 capdb_getaltlog(char *bp, const char *shrt, const char *lng) 421 { 422 if (cgetcap(bp, (char *)/*XXX*/lng, ':')) 423 return 1; 424 if (cgetcap(bp, (char *)/*XXX*/shrt, ':')) 425 return 1; 426 return 0; 427 } 428 429 /* 430 * Also should be a part of a better cget* library. 431 * Given a capdb entry, attempt to figure out what its canonical name 432 * is, and return a malloced copy of it. The canonical name is 433 * considered to be the first one listed. 434 */ 435 static char * 436 capdb_canonical_name(const char *bp) 437 { 438 char *retval; 439 const char *nameend; 440 441 nameend = strpbrk(bp, "|:"); 442 if (nameend == NULL) 443 nameend = bp + 1; 444 if ((retval = malloc(nameend - bp + 1)) != NULL) { 445 retval[0] = '\0'; 446 strncat(retval, bp, nameend - bp); 447 } 448 return retval; 449 } 450 451 452