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 30 static const char copyright[] = 31 "Copyright (C) 1997, Massachusetts Institute of Technology\r\n"; 32 33 #include "lp.cdefs.h" /* A cross-platform version of <sys/cdefs.h> */ 34 __FBSDID("$FreeBSD$"); 35 36 #include <sys/types.h> 37 #include <sys/queue.h> 38 #include <sys/stat.h> 39 40 #include <err.h> 41 #include <errno.h> 42 #include <grp.h> 43 #include <stdio.h> 44 #include <string.h> 45 #include <stdlib.h> 46 #include <unistd.h> 47 48 #include <sys/param.h> /* needed for lp.h but not used here */ 49 #include <dirent.h> /* ditto */ 50 #include "lp.h" 51 #include "lp.local.h" 52 #include "pathnames.h" 53 #include "skimprintcap.h" 54 55 static void check_spool_dirs(void); 56 static int interpret_error(const struct printer *pp, int error); 57 static void make_spool_dir(const struct printer *pp); 58 static void note_spool_dir(const struct printer *pp, const struct stat *st); 59 static void usage(void) __dead2; 60 61 static int problems; /* number of problems encountered */ 62 63 /* 64 * chkprintcap - check the printcap file for syntactic and semantic errors 65 * Returns the number of problems found. 66 */ 67 int 68 main(int argc, char **argv) 69 { 70 struct skiminfo *skres; 71 char *pcap_fname; 72 int c, error, makedirs, more, queuecnt, verbosity; 73 struct printer myprinter, *pp; 74 75 makedirs = 0; 76 queuecnt = 0; 77 verbosity = 0; 78 pcap_fname = NULL; 79 pp = &myprinter; 80 81 while ((c = getopt(argc, argv, "df:v")) != -1) { 82 switch (c) { 83 case 'd': 84 makedirs = 1; 85 break; 86 87 case 'f': 88 pcap_fname = strdup(optarg); 89 setprintcap(pcap_fname); 90 break; 91 92 case 'v': 93 verbosity++; 94 break; 95 96 default: 97 usage(); 98 } 99 } 100 101 if (optind != argc) 102 usage(); 103 104 if (pcap_fname == NULL) 105 pcap_fname = strdup(_PATH_PRINTCAP); 106 107 /* 108 * Skim through the printcap file looking for simple user-mistakes 109 * which will produce the wrong result for the user, but which may 110 * be pretty hard for the user to notice. Such user-mistakes will 111 * only generate warning messages. The (fatal-) problem count will 112 * only be incremented if there is a system problem trying to read 113 * the printcap file. 114 */ 115 skres = skim_printcap(pcap_fname, verbosity); 116 if (skres == NULL) { 117 problems = 1; 118 goto main_ret; 119 } else if (skres->fatalerr) { 120 problems = skres->fatalerr; 121 goto main_ret; 122 } 123 124 /* 125 * Now use the standard capability-db routines to check the values 126 * in each of the queues defined in the printcap file. 127 */ 128 more = firstprinter(pp, &error); 129 if (interpret_error(pp, error) && more) 130 goto next; 131 132 while (more) { 133 struct stat stab; 134 135 queuecnt++; 136 errno = 0; 137 if (stat(pp->spool_dir, &stab) < 0) { 138 if (errno == ENOENT && makedirs) { 139 make_spool_dir(pp); 140 } else { 141 problems++; 142 warn("%s: %s", pp->printer, pp->spool_dir); 143 } 144 } else { 145 note_spool_dir(pp, &stab); 146 } 147 148 /* Make other queue-specific validity checks here... */ 149 150 next: 151 more = nextprinter(pp, &error); 152 if (interpret_error(pp, error) && more) 153 goto next; 154 } 155 156 check_spool_dirs(); 157 158 if (queuecnt != skres->entries) { 159 warnx("WARNING: found %d entries when skimming %s,", 160 skres->entries, pcap_fname); 161 warnx("WARNING: but only found %d queues to process!", 162 queuecnt); 163 } 164 165 main_ret: 166 free(pcap_fname); 167 return (problems); 168 } 169 170 /* 171 * Interpret the error code. Returns 1 if we should skip to the next 172 * record (as this record is unlikely to make sense). If the problem 173 * is very severe, exit. Otherwise, return zero. 174 */ 175 static int 176 interpret_error(const struct printer *pp, int error) 177 { 178 switch(error) { 179 case PCAPERR_OSERR: 180 err(++problems, "reading printer database"); 181 case PCAPERR_TCLOOP: 182 ++problems; 183 warnx("%s: loop detected in tc= expansion", pp->printer); 184 return 1; 185 case PCAPERR_TCOPEN: 186 warnx("%s: unresolved tc= expansion", pp->printer); 187 return 1; 188 case PCAPERR_SUCCESS: 189 break; 190 default: 191 errx(++problems, "unknown printcap library error %d", error); 192 } 193 return 0; 194 } 195 196 /* 197 * Keep the list of spool directories. Note that we don't whine 198 * until all spool directories are noted, so that all of the more serious 199 * problems are noted first. We keep the list sorted by st_dev and 200 * st_ino, so that the problem spool directories can be noted in 201 * a single loop. 202 */ 203 struct dirlist { 204 LIST_ENTRY(dirlist) link; 205 struct stat stab; 206 char *path; 207 char *printer; 208 }; 209 210 static LIST_HEAD(, dirlist) dirlist; 211 212 static int 213 lessp(const struct dirlist *a, const struct dirlist *b) 214 { 215 if (a->stab.st_dev == b->stab.st_dev) 216 return a->stab.st_ino < b->stab.st_ino; 217 return a->stab.st_dev < b->stab.st_dev; 218 } 219 220 static int 221 equal(const struct dirlist *a, const struct dirlist *b) 222 { 223 return ((a->stab.st_dev == b->stab.st_dev) 224 && (a->stab.st_ino == b->stab.st_ino)); 225 } 226 227 static void 228 note_spool_dir(const struct printer *pp, const struct stat *st) 229 { 230 struct dirlist *dp, *dp2, *last; 231 232 dp = malloc(sizeof *dp); 233 if (dp == NULL) 234 err(++problems, "malloc(%lu)", (u_long)sizeof *dp); 235 236 dp->stab = *st; 237 dp->printer = strdup(pp->printer); 238 if (dp->printer == 0) 239 err(++problems, "malloc(%lu)", strlen(pp->printer) + 1UL); 240 dp->path = strdup(pp->spool_dir); 241 if (dp->path == 0) 242 err(++problems, "malloc(%lu)", strlen(pp->spool_dir) + 1UL); 243 244 last = NULL; 245 LIST_FOREACH(dp2, &dirlist, link) { 246 if(!lessp(dp, dp2)) 247 break; 248 last = dp2; 249 } 250 251 if (last) { 252 LIST_INSERT_AFTER(last, dp, link); 253 } else { 254 LIST_INSERT_HEAD(&dirlist, dp, link); 255 } 256 } 257 258 static void 259 check_spool_dirs(void) 260 { 261 struct dirlist *dp, *dp2; 262 263 for (dp = LIST_FIRST(&dirlist); dp; dp = dp2) { 264 dp2 = LIST_NEXT(dp, link); 265 266 if (dp2 != NULL && equal(dp, dp2)) { 267 ++problems; 268 if (strcmp(dp->path, dp2->path) == 0) { 269 warnx("%s and %s share the same spool, %s", 270 dp->printer, dp2->printer, dp->path); 271 } else { 272 warnx("%s (%s) and %s (%s) are the same " 273 "directory", dp->path, dp->printer, 274 dp2->path, dp2->printer); 275 } 276 continue; 277 } 278 /* Should probably check owners and modes here. */ 279 } 280 } 281 282 #ifndef SPOOL_DIR_MODE 283 #define SPOOL_DIR_MODE (S_IRUSR | S_IWUSR | S_IXUSR \ 284 | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) 285 #endif 286 287 static void 288 make_spool_dir(const struct printer *pp) 289 { 290 char *sd = pp->spool_dir; 291 struct group *gr; 292 struct stat stab; 293 294 if (mkdir(sd, S_IRUSR | S_IXUSR) < 0) { 295 problems++; 296 warn("%s: mkdir %s", pp->printer, sd); 297 return; 298 } 299 gr = getgrnam("daemon"); 300 if (gr == NULL) 301 errx(++problems, "cannot locate daemon group"); 302 303 if (chown(sd, pp->daemon_user, gr->gr_gid) < 0) { 304 ++problems; 305 warn("%s: cannot change ownership to %ld:%ld", sd, 306 (long)pp->daemon_user, (long)gr->gr_gid); 307 return; 308 } 309 310 if (chmod(sd, SPOOL_DIR_MODE) < 0) { 311 ++problems; 312 warn("%s: cannot change mode to %lo", sd, (long)SPOOL_DIR_MODE); 313 return; 314 } 315 if (stat(sd, &stab) < 0) 316 err(++problems, "stat: %s", sd); 317 318 note_spool_dir(pp, &stab); 319 } 320 321 static void 322 usage(void) 323 { 324 fprintf(stderr, "usage:\n\tchkprintcap [-dv] [-f printcapfile]\n"); 325 exit(1); 326 } 327