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