1 /* 2 * Copyright 1997 Massachusetts Institute of Technology 3 * 4 * Permission to use, copy, modify, and distribute this software and 5 * its documentation for any purpose and without fee is hereby 6 * granted, provided that both the above copyright notice and this 7 * permission notice appear in all copies, that both the above 8 * copyright notice and this permission notice appear in all 9 * supporting documentation, and that the name of M.I.T. not be used 10 * in advertising or publicity pertaining to distribution of the 11 * software without specific, written prior permission. M.I.T. makes 12 * no representations about the suitability of this software for any 13 * purpose. It is provided "as is" without express or implied 14 * warranty. 15 * 16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (C) 1997, Massachusetts Institute of Technology 30 * $FreeBSD: src/usr.sbin/lpr/chkprintcap/chkprintcap.c,v 1.3.2.2 2002/04/18 20:45:23 gad Exp $ 31 * $DragonFly: src/usr.sbin/lpr/chkprintcap/chkprintcap.c,v 1.2 2003/06/17 04:29:55 dillon Exp $ 32 */ 33 34 #include <sys/types.h> 35 #include <sys/queue.h> 36 #include <sys/stat.h> 37 38 #include <err.h> 39 #include <errno.h> 40 #include <grp.h> 41 #include <stdio.h> 42 #include <string.h> 43 #include <stdlib.h> 44 #include <unistd.h> 45 46 #include <sys/param.h> /* needed for lp.h but not used here */ 47 #include <dirent.h> /* ditto */ 48 #include "lp.h" 49 #include "lp.local.h" 50 #include "pathnames.h" 51 #include "skimprintcap.h" 52 53 static void check_spool_dirs(void); 54 static int interpret_error(const struct printer *pp, int error); 55 static void make_spool_dir(const struct printer *pp); 56 static void note_spool_dir(const struct printer *pp, const struct stat *st); 57 static void usage(void) __dead2; 58 59 static int problems; /* number of problems encountered */ 60 61 /* 62 * chkprintcap - check the printcap file for syntactic and semantic errors 63 * Returns the number of problems found. 64 */ 65 int 66 main(int argc, char **argv) 67 { 68 struct skiminfo *skres; 69 char *pcap_fname; 70 int c, error, makedirs, more, queuecnt, verbosity; 71 struct printer myprinter, *pp; 72 73 makedirs = 0; 74 queuecnt = 0; 75 verbosity = 0; 76 pcap_fname = NULL; 77 pp = &myprinter; 78 79 while ((c = getopt(argc, argv, "df:v")) != -1) { 80 switch (c) { 81 case 'd': 82 makedirs = 1; 83 break; 84 85 case 'f': 86 pcap_fname = strdup(optarg); 87 setprintcap(pcap_fname); 88 break; 89 90 case 'v': 91 verbosity++; 92 break; 93 94 default: 95 usage(); 96 } 97 } 98 99 if (optind != argc) 100 usage(); 101 102 if (pcap_fname == NULL) 103 pcap_fname = strdup(_PATH_PRINTCAP); 104 105 /* 106 * Skim through the printcap file looking for simple user-mistakes 107 * which will produce the wrong result for the user, but which may 108 * be pretty hard for the user to notice. Such user-mistakes will 109 * only generate warning messages. The (fatal-) problem count will 110 * only be incremented if there is a system problem trying to read 111 * the printcap file. 112 */ 113 skres = skim_printcap(pcap_fname, verbosity); 114 if (skres->fatalerr) 115 return (skres->fatalerr); 116 117 /* 118 * Now use the standard capability-db routines to check the values 119 * in each of the queues defined in the printcap file. 120 */ 121 more = firstprinter(pp, &error); 122 if (interpret_error(pp, error) && more) 123 goto next; 124 125 while (more) { 126 struct stat stab; 127 128 queuecnt++; 129 errno = 0; 130 if (stat(pp->spool_dir, &stab) < 0) { 131 if (errno == ENOENT && makedirs) { 132 make_spool_dir(pp); 133 } else { 134 problems++; 135 warn("%s: %s", pp->printer, pp->spool_dir); 136 } 137 } else { 138 note_spool_dir(pp, &stab); 139 } 140 141 /* Make other queue-specific validity checks here... */ 142 143 next: 144 more = nextprinter(pp, &error); 145 if (interpret_error(pp, error) && more) 146 goto next; 147 } 148 149 check_spool_dirs(); 150 151 if (queuecnt != skres->entries) { 152 warnx("WARNING: found %d entries when skimming %s,", 153 skres->entries, pcap_fname); 154 warnx("WARNING: but only found %d queues to process!", 155 queuecnt); 156 } 157 return (problems); 158 } 159 160 /* 161 * Interpret the error code. Returns 1 if we should skip to the next 162 * record (as this record is unlikely to make sense). If the problem 163 * is very severe, exit. Otherwise, return zero. 164 */ 165 static int 166 interpret_error(const struct printer *pp, int error) 167 { 168 switch(error) { 169 case PCAPERR_OSERR: 170 err(++problems, "reading printer database"); 171 case PCAPERR_TCLOOP: 172 ++problems; 173 warnx("%s: loop detected in tc= expansion", pp->printer); 174 return 1; 175 case PCAPERR_TCOPEN: 176 warnx("%s: unresolved tc= expansion", pp->printer); 177 return 1; 178 case PCAPERR_SUCCESS: 179 break; 180 default: 181 errx(++problems, "unknown printcap library error %d", error); 182 } 183 return 0; 184 } 185 186 /* 187 * Keep the list of spool directories. Note that we don't whine 188 * until all spool directories are noted, so that all of the more serious 189 * problems are noted first. We keep the list sorted by st_dev and 190 * st_ino, so that the problem spool directories can be noted in 191 * a single loop. 192 */ 193 struct dirlist { 194 LIST_ENTRY(dirlist) link; 195 struct stat stab; 196 char *path; 197 char *printer; 198 }; 199 200 static LIST_HEAD(, dirlist) dirlist; 201 202 static int 203 lessp(const struct dirlist *a, const struct dirlist *b) 204 { 205 if (a->stab.st_dev == b->stab.st_dev) 206 return a->stab.st_ino < b->stab.st_ino; 207 return a->stab.st_dev < b->stab.st_dev; 208 } 209 210 static int 211 equal(const struct dirlist *a, const struct dirlist *b) 212 { 213 return ((a->stab.st_dev == b->stab.st_dev) 214 && (a->stab.st_ino == b->stab.st_ino)); 215 } 216 217 static void 218 note_spool_dir(const struct printer *pp, const struct stat *st) 219 { 220 struct dirlist *dp, *dp2, *last; 221 222 dp = malloc(sizeof *dp); 223 if (dp == 0) 224 err(++problems, "malloc(%lu)", (u_long)sizeof *dp); 225 226 dp->stab = *st; 227 dp->printer = strdup(pp->printer); 228 if (dp->printer == 0) 229 err(++problems, "malloc(%lu)", strlen(pp->printer) + 1UL); 230 dp->path = strdup(pp->spool_dir); 231 if (dp->path == 0) 232 err(++problems, "malloc(%lu)", strlen(pp->spool_dir) + 1UL); 233 234 last = 0; 235 LIST_FOREACH(dp2, &dirlist, link) { 236 if(!lessp(dp, dp2)) 237 break; 238 last = dp2; 239 } 240 241 if (last) { 242 LIST_INSERT_AFTER(last, dp, link); 243 } else { 244 LIST_INSERT_HEAD(&dirlist, dp, link); 245 } 246 } 247 248 static void 249 check_spool_dirs(void) 250 { 251 struct dirlist *dp, *dp2; 252 253 for (dp = LIST_FIRST(&dirlist); dp; dp = dp2) { 254 dp2 = LIST_NEXT(dp, link); 255 256 if (dp2 != 0 && equal(dp, dp2)) { 257 ++problems; 258 if (strcmp(dp->path, dp2->path) == 0) { 259 warnx("%s and %s share the same spool, %s", 260 dp->printer, dp2->printer, dp->path); 261 } else { 262 warnx("%s (%s) and %s (%s) are the same " 263 "directory", dp->path, dp->printer, 264 dp2->path, dp2->printer); 265 } 266 continue; 267 } 268 /* Should probably check owners and modes here. */ 269 } 270 } 271 272 #ifndef SPOOL_DIR_MODE 273 #define SPOOL_DIR_MODE (S_IRUSR | S_IWUSR | S_IXUSR \ 274 | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) 275 #endif 276 277 static void 278 make_spool_dir(const struct printer *pp) 279 { 280 char *sd = pp->spool_dir; 281 struct group *gr; 282 struct stat stab; 283 284 if (mkdir(sd, S_IRUSR | S_IXUSR) < 0) { 285 problems++; 286 warn("%s: mkdir %s", pp->printer, sd); 287 return; 288 } 289 gr = getgrnam("daemon"); 290 if (gr == 0) 291 errx(++problems, "cannot locate daemon group"); 292 293 if (chown(sd, pp->daemon_user, gr->gr_gid) < 0) { 294 ++problems; 295 warn("%s: cannot change ownership to %ld:%ld", sd, 296 (long)pp->daemon_user, (long)gr->gr_gid); 297 return; 298 } 299 300 if (chmod(sd, SPOOL_DIR_MODE) < 0) { 301 ++problems; 302 warn("%s: cannot change mode to %lo", sd, (long)SPOOL_DIR_MODE); 303 return; 304 } 305 if (stat(sd, &stab) < 0) 306 err(++problems, "stat: %s", sd); 307 308 note_spool_dir(pp, &stab); 309 } 310 311 static void 312 usage(void) 313 { 314 fprintf(stderr, "usage:\n\tchkprintcap [-dv] [-f printcapfile]\n"); 315 exit(1); 316 } 317