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 #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 == NULL) { 115 problems = 1; 116 goto main_ret; 117 } else if (skres->fatalerr) { 118 problems = skres->fatalerr; 119 goto main_ret; 120 } 121 122 /* 123 * Now use the standard capability-db routines to check the values 124 * in each of the queues defined in the printcap file. 125 */ 126 more = firstprinter(pp, &error); 127 if (interpret_error(pp, error) && more) 128 goto next; 129 130 while (more) { 131 struct stat stab; 132 133 queuecnt++; 134 errno = 0; 135 if (stat(pp->spool_dir, &stab) < 0) { 136 if (errno == ENOENT && makedirs) { 137 make_spool_dir(pp); 138 } else { 139 problems++; 140 warn("%s: %s", pp->printer, pp->spool_dir); 141 } 142 } else { 143 note_spool_dir(pp, &stab); 144 } 145 146 /* Make other queue-specific validity checks here... */ 147 148 next: 149 more = nextprinter(pp, &error); 150 if (interpret_error(pp, error) && more) 151 goto next; 152 } 153 154 check_spool_dirs(); 155 156 if (queuecnt != skres->entries) { 157 warnx("WARNING: found %d entries when skimming %s,", 158 skres->entries, pcap_fname); 159 warnx("WARNING: but only found %d queues to process!", 160 queuecnt); 161 } 162 163 main_ret: 164 free(pcap_fname); 165 return (problems); 166 } 167 168 /* 169 * Interpret the error code. Returns 1 if we should skip to the next 170 * record (as this record is unlikely to make sense). If the problem 171 * is very severe, exit. Otherwise, return zero. 172 */ 173 static int 174 interpret_error(const struct printer *pp, int error) 175 { 176 switch(error) { 177 case PCAPERR_OSERR: 178 err(++problems, "reading printer database"); 179 case PCAPERR_TCLOOP: 180 ++problems; 181 warnx("%s: loop detected in tc= expansion", pp->printer); 182 return 1; 183 case PCAPERR_TCOPEN: 184 warnx("%s: unresolved tc= expansion", pp->printer); 185 return 1; 186 case PCAPERR_SUCCESS: 187 break; 188 default: 189 errx(++problems, "unknown printcap library error %d", error); 190 } 191 return 0; 192 } 193 194 /* 195 * Keep the list of spool directories. Note that we don't whine 196 * until all spool directories are noted, so that all of the more serious 197 * problems are noted first. We keep the list sorted by st_dev and 198 * st_ino, so that the problem spool directories can be noted in 199 * a single loop. 200 */ 201 struct dirlist { 202 LIST_ENTRY(dirlist) link; 203 struct stat stab; 204 char *path; 205 char *printer; 206 }; 207 208 static LIST_HEAD(, dirlist) dirlist; 209 210 static int 211 lessp(const struct dirlist *a, const struct dirlist *b) 212 { 213 if (a->stab.st_dev == b->stab.st_dev) 214 return a->stab.st_ino < b->stab.st_ino; 215 return a->stab.st_dev < b->stab.st_dev; 216 } 217 218 static int 219 equal(const struct dirlist *a, const struct dirlist *b) 220 { 221 return ((a->stab.st_dev == b->stab.st_dev) 222 && (a->stab.st_ino == b->stab.st_ino)); 223 } 224 225 static void 226 note_spool_dir(const struct printer *pp, const struct stat *st) 227 { 228 struct dirlist *dp, *dp2, *last; 229 230 dp = malloc(sizeof *dp); 231 if (dp == NULL) 232 err(++problems, "malloc(%lu)", (u_long)sizeof *dp); 233 234 dp->stab = *st; 235 dp->printer = strdup(pp->printer); 236 if (dp->printer == 0) 237 err(++problems, "malloc(%lu)", strlen(pp->printer) + 1UL); 238 dp->path = strdup(pp->spool_dir); 239 if (dp->path == 0) 240 err(++problems, "malloc(%lu)", strlen(pp->spool_dir) + 1UL); 241 242 last = NULL; 243 LIST_FOREACH(dp2, &dirlist, link) { 244 if(!lessp(dp, dp2)) 245 break; 246 last = dp2; 247 } 248 249 if (last) { 250 LIST_INSERT_AFTER(last, dp, link); 251 } else { 252 LIST_INSERT_HEAD(&dirlist, dp, link); 253 } 254 } 255 256 static void 257 check_spool_dirs(void) 258 { 259 struct dirlist *dp, *dp2; 260 261 for (dp = LIST_FIRST(&dirlist); dp; dp = dp2) { 262 dp2 = LIST_NEXT(dp, link); 263 264 if (dp2 != NULL && equal(dp, dp2)) { 265 ++problems; 266 if (strcmp(dp->path, dp2->path) == 0) { 267 warnx("%s and %s share the same spool, %s", 268 dp->printer, dp2->printer, dp->path); 269 } else { 270 warnx("%s (%s) and %s (%s) are the same " 271 "directory", dp->path, dp->printer, 272 dp2->path, dp2->printer); 273 } 274 continue; 275 } 276 /* Should probably check owners and modes here. */ 277 } 278 } 279 280 #ifndef SPOOL_DIR_MODE 281 #define SPOOL_DIR_MODE (S_IRUSR | S_IWUSR | S_IXUSR \ 282 | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) 283 #endif 284 285 static void 286 make_spool_dir(const struct printer *pp) 287 { 288 char *sd = pp->spool_dir; 289 struct group *gr; 290 struct stat stab; 291 292 if (mkdir(sd, S_IRUSR | S_IXUSR) < 0) { 293 problems++; 294 warn("%s: mkdir %s", pp->printer, sd); 295 return; 296 } 297 gr = getgrnam("daemon"); 298 if (gr == NULL) 299 errx(++problems, "cannot locate daemon group"); 300 301 if (chown(sd, pp->daemon_user, gr->gr_gid) < 0) { 302 ++problems; 303 warn("%s: cannot change ownership to %ld:%ld", sd, 304 (long)pp->daemon_user, (long)gr->gr_gid); 305 return; 306 } 307 308 if (chmod(sd, SPOOL_DIR_MODE) < 0) { 309 ++problems; 310 warn("%s: cannot change mode to %lo", sd, (long)SPOOL_DIR_MODE); 311 return; 312 } 313 if (stat(sd, &stab) < 0) 314 err(++problems, "stat: %s", sd); 315 316 note_spool_dir(pp, &stab); 317 } 318 319 static void 320 usage(void) 321 { 322 fprintf(stderr, "usage:\n\tchkprintcap [-dv] [-f printcapfile]\n"); 323 exit(1); 324 } 325