1 /* $Id: manpath.c,v 1.35 2017/07/01 09:47:30 schwarze Exp $ */ 2 /* 3 * Copyright (c) 2011, 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org> 4 * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 #include "config.h" 19 20 #include <sys/types.h> 21 #include <sys/stat.h> 22 23 #include <ctype.h> 24 #if HAVE_ERR 25 #include <err.h> 26 #endif 27 #include <limits.h> 28 #include <stdio.h> 29 #include <stdlib.h> 30 #include <string.h> 31 32 #include "mandoc_aux.h" 33 #include "manconf.h" 34 35 static void manconf_file(struct manconf *, const char *); 36 static void manpath_add(struct manpaths *, const char *, int); 37 static void manpath_parseline(struct manpaths *, char *, int); 38 39 40 void 41 manconf_parse(struct manconf *conf, const char *file, 42 char *defp, char *auxp) 43 { 44 char *insert; 45 46 /* Always prepend -m. */ 47 manpath_parseline(&conf->manpath, auxp, 1); 48 49 /* If -M is given, it overrides everything else. */ 50 if (NULL != defp) { 51 manpath_parseline(&conf->manpath, defp, 1); 52 return; 53 } 54 55 /* MANPATH and man.conf(5) cooperate. */ 56 defp = getenv("MANPATH"); 57 if (NULL == file) 58 file = MAN_CONF_FILE; 59 60 /* No MANPATH; use man.conf(5) only. */ 61 if (NULL == defp || '\0' == defp[0]) { 62 manconf_file(conf, file); 63 return; 64 } 65 66 /* Prepend man.conf(5) to MANPATH. */ 67 if (':' == defp[0]) { 68 manconf_file(conf, file); 69 manpath_parseline(&conf->manpath, defp, 0); 70 return; 71 } 72 73 /* Append man.conf(5) to MANPATH. */ 74 if (':' == defp[strlen(defp) - 1]) { 75 manpath_parseline(&conf->manpath, defp, 0); 76 manconf_file(conf, file); 77 return; 78 } 79 80 /* Insert man.conf(5) into MANPATH. */ 81 insert = strstr(defp, "::"); 82 if (NULL != insert) { 83 *insert++ = '\0'; 84 manpath_parseline(&conf->manpath, defp, 0); 85 manconf_file(conf, file); 86 manpath_parseline(&conf->manpath, insert + 1, 0); 87 return; 88 } 89 90 /* MANPATH overrides man.conf(5) completely. */ 91 manpath_parseline(&conf->manpath, defp, 0); 92 } 93 94 void 95 manpath_base(struct manpaths *dirs) 96 { 97 char path_base[] = MANPATH_BASE; 98 manpath_parseline(dirs, path_base, 0); 99 } 100 101 /* 102 * Parse a FULL pathname from a colon-separated list of arrays. 103 */ 104 static void 105 manpath_parseline(struct manpaths *dirs, char *path, int complain) 106 { 107 char *dir; 108 109 if (NULL == path) 110 return; 111 112 for (dir = strtok(path, ":"); dir; dir = strtok(NULL, ":")) 113 manpath_add(dirs, dir, complain); 114 } 115 116 /* 117 * Add a directory to the array, ignoring bad directories. 118 * Grow the array one-by-one for simplicity's sake. 119 */ 120 static void 121 manpath_add(struct manpaths *dirs, const char *dir, int complain) 122 { 123 char buf[PATH_MAX]; 124 struct stat sb; 125 char *cp; 126 size_t i; 127 128 if (NULL == (cp = realpath(dir, buf))) { 129 if (complain) 130 warn("manpath: %s", dir); 131 return; 132 } 133 134 for (i = 0; i < dirs->sz; i++) 135 if (0 == strcmp(dirs->paths[i], dir)) 136 return; 137 138 if (stat(cp, &sb) == -1) { 139 if (complain) 140 warn("manpath: %s", dir); 141 return; 142 } 143 144 dirs->paths = mandoc_reallocarray(dirs->paths, 145 dirs->sz + 1, sizeof(char *)); 146 147 dirs->paths[dirs->sz++] = mandoc_strdup(cp); 148 } 149 150 void 151 manconf_free(struct manconf *conf) 152 { 153 size_t i; 154 155 for (i = 0; i < conf->manpath.sz; i++) 156 free(conf->manpath.paths[i]); 157 158 free(conf->manpath.paths); 159 free(conf->output.includes); 160 free(conf->output.man); 161 free(conf->output.paper); 162 free(conf->output.style); 163 } 164 165 static void 166 manconf_file(struct manconf *conf, const char *file) 167 { 168 const char *const toks[] = { "manpath", "output", "_whatdb" }; 169 char manpath_default[] = MANPATH_DEFAULT; 170 171 FILE *stream; 172 char *line, *cp, *ep; 173 size_t linesz, tok, toklen; 174 ssize_t linelen; 175 176 if ((stream = fopen(file, "r")) == NULL) 177 goto out; 178 179 line = NULL; 180 linesz = 0; 181 182 while ((linelen = getline(&line, &linesz, stream)) != -1) { 183 cp = line; 184 ep = cp + linelen - 1; 185 while (ep > cp && isspace((unsigned char)*ep)) 186 *ep-- = '\0'; 187 while (isspace((unsigned char)*cp)) 188 cp++; 189 if (cp == ep || *cp == '#') 190 continue; 191 192 for (tok = 0; tok < sizeof(toks)/sizeof(toks[0]); tok++) { 193 toklen = strlen(toks[tok]); 194 if (cp + toklen < ep && 195 isspace((unsigned char)cp[toklen]) && 196 strncmp(cp, toks[tok], toklen) == 0) { 197 cp += toklen; 198 while (isspace((unsigned char)*cp)) 199 cp++; 200 break; 201 } 202 } 203 204 switch (tok) { 205 case 2: /* _whatdb */ 206 while (ep > cp && ep[-1] != '/') 207 ep--; 208 if (ep == cp) 209 continue; 210 *ep = '\0'; 211 /* FALLTHROUGH */ 212 case 0: /* manpath */ 213 manpath_add(&conf->manpath, cp, 0); 214 *manpath_default = '\0'; 215 break; 216 case 1: /* output */ 217 manconf_output(&conf->output, cp, 1); 218 break; 219 default: 220 break; 221 } 222 } 223 free(line); 224 fclose(stream); 225 226 out: 227 if (*manpath_default != '\0') 228 manpath_parseline(&conf->manpath, manpath_default, 0); 229 } 230 231 int 232 manconf_output(struct manoutput *conf, const char *cp, int fromfile) 233 { 234 const char *const toks[] = { 235 "includes", "man", "paper", "style", 236 "indent", "width", "fragment", "mdoc", "noval" 237 }; 238 239 const char *errstr; 240 char *oldval; 241 size_t len, tok; 242 243 for (tok = 0; tok < sizeof(toks)/sizeof(toks[0]); tok++) { 244 len = strlen(toks[tok]); 245 if ( ! strncmp(cp, toks[tok], len) && 246 strchr(" = ", cp[len]) != NULL) { 247 cp += len; 248 if (*cp == '=') 249 cp++; 250 while (isspace((unsigned char)*cp)) 251 cp++; 252 break; 253 } 254 } 255 256 if (tok < 6 && *cp == '\0') { 257 warnx("-O %s=?: Missing argument value", toks[tok]); 258 return -1; 259 } 260 if ((tok == 6 || tok == 7) && *cp != '\0') { 261 warnx("-O %s: Does not take a value: %s", toks[tok], cp); 262 return -1; 263 } 264 265 switch (tok) { 266 case 0: 267 if (conf->includes != NULL) { 268 oldval = mandoc_strdup(conf->includes); 269 break; 270 } 271 conf->includes = mandoc_strdup(cp); 272 return 0; 273 case 1: 274 if (conf->man != NULL) { 275 oldval = mandoc_strdup(conf->man); 276 break; 277 } 278 conf->man = mandoc_strdup(cp); 279 return 0; 280 case 2: 281 if (conf->paper != NULL) { 282 oldval = mandoc_strdup(conf->paper); 283 break; 284 } 285 conf->paper = mandoc_strdup(cp); 286 return 0; 287 case 3: 288 if (conf->style != NULL) { 289 oldval = mandoc_strdup(conf->style); 290 break; 291 } 292 conf->style = mandoc_strdup(cp); 293 return 0; 294 case 4: 295 if (conf->indent) { 296 mandoc_asprintf(&oldval, "%zu", conf->indent); 297 break; 298 } 299 conf->indent = strtonum(cp, 0, 1000, &errstr); 300 if (errstr == NULL) 301 return 0; 302 warnx("-O indent=%s is %s", cp, errstr); 303 return -1; 304 case 5: 305 if (conf->width) { 306 mandoc_asprintf(&oldval, "%zu", conf->width); 307 break; 308 } 309 conf->width = strtonum(cp, 1, 1000, &errstr); 310 if (errstr == NULL) 311 return 0; 312 warnx("-O width=%s is %s", cp, errstr); 313 return -1; 314 case 6: 315 conf->fragment = 1; 316 return 0; 317 case 7: 318 conf->mdoc = 1; 319 return 0; 320 case 8: 321 conf->noval = 1; 322 return 0; 323 default: 324 if (fromfile) 325 warnx("-O %s: Bad argument", cp); 326 return -1; 327 } 328 if (fromfile == 0) 329 warnx("-O %s=%s: Option already set to %s", 330 toks[tok], cp, oldval); 331 free(oldval); 332 return -1; 333 } 334