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 41 #ifndef lint 42 static const char rcsid[] = 43 "$FreeBSD$"; 44 #endif /* not lint */ 45 46 #include <errno.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <unistd.h> 51 52 #include <sys/param.h> /* required for lp.h, but not used here */ 53 #include <sys/dirent.h> /* ditto */ 54 #include "lp.h" 55 #include "lp.local.h" 56 #include "pathnames.h" 57 58 /* 59 * Routines and data used in processing the printcap file. 60 */ 61 static char *printcapdb[2] = { _PATH_PRINTCAP, 0 }; /* list for cget* */ 62 63 static char *capdb_canonical_name(const char *); 64 static int capdb_getaltlog(char *, const char *, const char *); 65 static int capdb_getaltnum(char *, const char *, const char *, long, long *); 66 static int capdb_getaltstr(char *, const char *, const char *, const char *, 67 char **); 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(bp, pp) 214 char *bp; 215 struct printer *pp; 216 { 217 enum lpd_filters filt; 218 char *rp_name; 219 int error; 220 221 if ((pp->printer = capdb_canonical_name(bp)) == 0) 222 return PCAPERR_OSERR; 223 224 #define CHK(x) do {if ((x) == PCAPERR_OSERR) return PCAPERR_OSERR;}while(0) 225 CHK(capdb_getaltstr(bp, "af", "acct.file", 0, &pp->acct_file)); 226 CHK(capdb_getaltnum(bp, "br", "tty.rate", 0, &pp->baud_rate)); 227 CHK(capdb_getaltnum(bp, "ct", "remote.timeout", DEFTIMEOUT, 228 &pp->conn_timeout)); 229 CHK(capdb_getaltnum(bp, "du", "daemon.user", DEFUID, 230 &pp->daemon_user)); 231 CHK(capdb_getaltstr(bp, "ff", "job.formfeed", DEFFF, &pp->form_feed)); 232 CHK(capdb_getaltstr(bp, "lf", "spool.log", _PATH_CONSOLE, 233 &pp->log_file)); 234 CHK(capdb_getaltstr(bp, "lo", "spool.lock", DEFLOCK, &pp->lock_file)); 235 CHK(capdb_getaltstr(bp, "lp", "tty.device", _PATH_DEFDEVLP, &pp->lp)); 236 CHK(capdb_getaltnum(bp, "mc", "max.copies", DEFMAXCOPIES, 237 &pp->max_copies)); 238 CHK(capdb_getaltstr(bp, "ms", "tty.mode", 0, &pp->mode_set)); 239 CHK(capdb_getaltnum(bp, "mx", "max.blocks", DEFMX, &pp->max_blocks)); 240 CHK(capdb_getaltnum(bp, "pc", "acct.price", 0, &pp->price100)); 241 CHK(capdb_getaltnum(bp, "pl", "page.length", DEFLENGTH, 242 &pp->page_length)); 243 CHK(capdb_getaltnum(bp, "pw", "page.width", DEFWIDTH, 244 &pp->page_width)); 245 CHK(capdb_getaltnum(bp, "px", "page.pwidth", 0, &pp->page_pwidth)); 246 CHK(capdb_getaltnum(bp, "py", "page.plength", 0, &pp->page_plength)); 247 CHK(capdb_getaltstr(bp, "rg", "daemon.restrictgrp", 0, 248 &pp->restrict_grp)); 249 CHK(capdb_getaltstr(bp, "rm", "remote.host", 0, &pp->remote_host)); 250 CHK(capdb_getaltstr(bp, "rp", "remote.queue", DEFLP, 251 &pp->remote_queue)); 252 CHK(capdb_getaltstr(bp, "sd", "spool.dir", _PATH_DEFSPOOL, 253 &pp->spool_dir)); 254 CHK(capdb_getaltstr(bp, "sr", "stat.recv", 0, &pp->stat_recv)); 255 CHK(capdb_getaltstr(bp, "ss", "stat.send", 0, &pp->stat_send)); 256 CHK(capdb_getaltstr(bp, "st", "spool.status", DEFSTAT, 257 &pp->status_file)); 258 CHK(capdb_getaltstr(bp, "tr", "job.trailer", 0, &pp->trailer)); 259 260 pp->restricted = capdb_getaltlog(bp, "rs", "daemon.restricted"); 261 pp->short_banner = capdb_getaltlog(bp, "sb", "banner.short"); 262 pp->no_copies = capdb_getaltlog(bp, "sc", "job.no_copies"); 263 pp->no_formfeed = capdb_getaltlog(bp, "sf", "job.no_formfeed"); 264 pp->no_header = capdb_getaltlog(bp, "sh", "banner.disable"); 265 pp->header_last = capdb_getaltlog(bp, "hl", "banner.last"); 266 pp->rw = capdb_getaltlog(bp, "rw", "tty.rw"); 267 pp->tof = !capdb_getaltlog(bp, "fo", "job.topofform"); 268 269 /* 270 * Decide if the remote printer name matches the local printer name. 271 * If no name is given then we assume they mean them to match. 272 * If a name is given see if the rp_name is one of the names for 273 * this printer. 274 */ 275 pp->rp_matches_local = 1; 276 CHK((error = capdb_getaltstr(bp, "rp", "remote.queue", 0, &rp_name))); 277 if (error != PCAPERR_NOTFOUND && rp_name != NULL) { 278 if (cgetmatch(bp,rp_name) != 0) 279 pp->rp_matches_local = 0; 280 free(rp_name); 281 } 282 283 /* 284 * Filters: 285 */ 286 for (filt = 0; filt < LPF_COUNT; filt++) { 287 CHK(capdb_getaltstr(bp, filters[filt], longfilters[filt], 0, 288 &pp->filters[filt])); 289 } 290 291 return 0; 292 } 293 294 /* 295 * Decode the error codes returned by cgetent() using the names we 296 * made up for them from "lp.h". 297 * This would have been much better done with Common Error, >sigh<. 298 * Perhaps this can be fixed in the next incarnation of cget*. 299 */ 300 const char * 301 pcaperr(int error) 302 { 303 switch(error) { 304 case PCAPERR_TCOPEN: 305 return "unresolved tc= expansion"; 306 case PCAPERR_SUCCESS: 307 return "no error"; 308 case PCAPERR_NOTFOUND: 309 return "printer not found"; 310 case PCAPERR_OSERR: 311 return strerror(errno); 312 case PCAPERR_TCLOOP: 313 return "loop detected in tc= expansion"; 314 default: 315 return "unknown printcap error"; 316 } 317 } 318 319 /* 320 * Initialize a `struct printer' to contain values harmless to 321 * the other routines in liblpr. 322 */ 323 void 324 init_printer(struct printer *pp) 325 { 326 static struct printer zero; 327 *pp = zero; 328 } 329 330 /* 331 * Free the dynamically-allocated strings in a `struct printer'. 332 * Idempotent. 333 */ 334 void 335 free_printer(struct printer *pp) 336 { 337 enum lpd_filters filt; 338 #define cfree(x) do { if (x) free(x); } while(0) 339 cfree(pp->printer); 340 cfree(pp->acct_file); 341 for (filt = 0; filt < LPF_COUNT; filt++) 342 cfree(pp->filters[filt]); 343 cfree(pp->form_feed); 344 cfree(pp->log_file); 345 cfree(pp->lock_file); 346 cfree(pp->lp); 347 cfree(pp->restrict_grp); 348 cfree(pp->remote_host); 349 cfree(pp->remote_queue); 350 cfree(pp->spool_dir); 351 cfree(pp->stat_recv); 352 cfree(pp->stat_send); 353 cfree(pp->status_file); 354 cfree(pp->trailer); 355 cfree(pp->mode_set); 356 357 init_printer(pp); 358 } 359 360 361 /* 362 * The following routines are part of what would be a sensible library 363 * interface to capability databases. Maybe someday this will become 364 * the default. 365 */ 366 367 /* 368 * It provides similar functionality to cgetstr(), 369 * except that it provides for both a long and a short 370 * capability name and allows for a default to be specified. 371 */ 372 static int 373 capdb_getaltstr(char *bp, const char *shrt, const char *lng, 374 const char *dflt, char **result) 375 { 376 int status; 377 378 status = cgetstr(bp, (char *)/*XXX*/lng, result); 379 if (status >= 0 || status == PCAPERR_OSERR) 380 return status; 381 status = cgetstr(bp, (char *)/*XXX*/shrt, result); 382 if (status >= 0 || status == PCAPERR_OSERR) 383 return status; 384 if (dflt) { 385 *result = strdup(dflt); 386 if (*result == 0) 387 return PCAPERR_OSERR; 388 return strlen(*result); 389 } 390 return PCAPERR_NOTFOUND; 391 } 392 393 /* 394 * The same, only for integers. 395 */ 396 static int 397 capdb_getaltnum(char *bp, const char *shrt, const char *lng, long dflt, 398 long *result) 399 { 400 int status; 401 402 status = cgetnum(bp, (char *)/*XXX*/lng, result); 403 if (status >= 0) 404 return status; 405 status = cgetnum(bp, (char *)/*XXX*/shrt, result); 406 if (status >= 0) 407 return status; 408 *result = dflt; 409 return 0; 410 } 411 412 /* 413 * Likewise for logical values. There's no need for a default parameter 414 * because the default is always false. 415 */ 416 static int 417 capdb_getaltlog(char *bp, const char *shrt, const char *lng) 418 { 419 if (cgetcap(bp, (char *)/*XXX*/lng, ':')) 420 return 1; 421 if (cgetcap(bp, (char *)/*XXX*/shrt, ':')) 422 return 1; 423 return 0; 424 } 425 426 /* 427 * Also should be a part of a better cget* library. 428 * Given a capdb entry, attempt to figure out what its canonical name 429 * is, and return a malloced copy of it. The canonical name is 430 * considered to be the first one listed. 431 */ 432 static char * 433 capdb_canonical_name(const char *bp) 434 { 435 char *retval; 436 const char *nameend; 437 438 nameend = strpbrk(bp, "|:"); 439 if (nameend == 0) 440 nameend = bp + 1; 441 if ((retval = malloc(nameend - bp + 1)) != 0) { 442 retval[0] = '\0'; 443 strncat(retval, bp, nameend - bp); 444 } 445 return retval; 446 } 447 448 449