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