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Annotation of mandoc/manpath.c, Revision 1.26

1.26    ! schwarze    1: /*     $Id: manpath.c,v 1.25 2015/05/07 12:08:13 schwarze Exp $        */
1.1       kristaps    2: /*
1.20      schwarze    3:  * Copyright (c) 2011, 2014, 2015 Ingo Schwarze <schwarze@openbsd.org>
1.1       kristaps    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:  *
1.22      schwarze   10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.1       kristaps   11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.22      schwarze   12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.1       kristaps   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"
1.16      schwarze   19:
                     20: #include <sys/types.h>
1.18      schwarze   21: #include <sys/stat.h>
1.1       kristaps   22:
                     23: #include <ctype.h>
                     24: #include <limits.h>
                     25: #include <stdio.h>
                     26: #include <stdlib.h>
                     27: #include <string.h>
                     28:
1.13      schwarze   29: #include "mandoc_aux.h"
1.23      schwarze   30: #include "manconf.h"
1.1       kristaps   31:
1.26    ! schwarze   32: #if !HAVE_MANPATH
1.23      schwarze   33: static void     manconf_file(struct manconf *, const char *);
1.26    ! schwarze   34: #endif
1.18      schwarze   35: static void     manpath_add(struct manpaths *, const char *, int);
                     36: static void     manpath_parseline(struct manpaths *, char *, int);
1.1       kristaps   37:
1.23      schwarze   38:
1.1       kristaps   39: void
1.23      schwarze   40: manconf_parse(struct manconf *conf, const char *file,
1.5       schwarze   41:                char *defp, char *auxp)
1.1       kristaps   42: {
1.17      schwarze   43: #if HAVE_MANPATH
1.11      schwarze   44:        char             cmd[(PATH_MAX * 3) + 20];
1.6       kristaps   45:        FILE            *stream;
                     46:        char            *buf;
                     47:        size_t           sz, bsz;
                     48:
                     49:        strlcpy(cmd, "manpath", sizeof(cmd));
                     50:        if (file) {
                     51:                strlcat(cmd, " -C ", sizeof(cmd));
                     52:                strlcat(cmd, file, sizeof(cmd));
                     53:        }
                     54:        if (auxp) {
                     55:                strlcat(cmd, " -m ", sizeof(cmd));
                     56:                strlcat(cmd, auxp, sizeof(cmd));
                     57:        }
                     58:        if (defp) {
                     59:                strlcat(cmd, " -M ", sizeof(cmd));
                     60:                strlcat(cmd, defp, sizeof(cmd));
                     61:        }
                     62:
                     63:        /* Open manpath(1).  Ignore errors. */
                     64:
                     65:        stream = popen(cmd, "r");
                     66:        if (NULL == stream)
                     67:                return;
                     68:
                     69:        buf = NULL;
                     70:        bsz = 0;
                     71:
                     72:        /* Read in as much output as we can. */
                     73:
                     74:        do {
                     75:                buf = mandoc_realloc(buf, bsz + 1024);
1.9       kristaps   76:                sz = fread(buf + bsz, 1, 1024, stream);
1.6       kristaps   77:                bsz += sz;
                     78:        } while (sz > 0);
                     79:
                     80:        if ( ! ferror(stream) && feof(stream) &&
                     81:                        bsz && '\n' == buf[bsz - 1]) {
                     82:                buf[bsz - 1] = '\0';
1.24      schwarze   83:                manpath_parseline(&conf->manpath, buf, 1);
1.6       kristaps   84:        }
1.1       kristaps   85:
1.6       kristaps   86:        free(buf);
                     87:        pclose(stream);
                     88: #else
1.8       kristaps   89:        char            *insert;
1.4       schwarze   90:
1.8       kristaps   91:        /* Always prepend -m. */
1.23      schwarze   92:        manpath_parseline(&conf->manpath, auxp, 1);
1.10      schwarze   93:
1.8       kristaps   94:        /* If -M is given, it overrides everything else. */
                     95:        if (NULL != defp) {
1.23      schwarze   96:                manpath_parseline(&conf->manpath, defp, 1);
1.8       kristaps   97:                return;
                     98:        }
1.1       kristaps   99:
1.8       kristaps  100:        /* MANPATH and man.conf(5) cooperate. */
                    101:        defp = getenv("MANPATH");
                    102:        if (NULL == file)
                    103:                file = MAN_CONF_FILE;
                    104:
                    105:        /* No MANPATH; use man.conf(5) only. */
                    106:        if (NULL == defp || '\0' == defp[0]) {
1.23      schwarze  107:                manconf_file(conf, file);
1.8       kristaps  108:                return;
                    109:        }
                    110:
                    111:        /* Prepend man.conf(5) to MANPATH. */
                    112:        if (':' == defp[0]) {
1.23      schwarze  113:                manconf_file(conf, file);
                    114:                manpath_parseline(&conf->manpath, defp, 0);
1.8       kristaps  115:                return;
                    116:        }
                    117:
                    118:        /* Append man.conf(5) to MANPATH. */
1.9       kristaps  119:        if (':' == defp[strlen(defp) - 1]) {
1.23      schwarze  120:                manpath_parseline(&conf->manpath, defp, 0);
                    121:                manconf_file(conf, file);
1.8       kristaps  122:                return;
                    123:        }
                    124:
                    125:        /* Insert man.conf(5) into MANPATH. */
                    126:        insert = strstr(defp, "::");
                    127:        if (NULL != insert) {
                    128:                *insert++ = '\0';
1.23      schwarze  129:                manpath_parseline(&conf->manpath, defp, 0);
                    130:                manconf_file(conf, file);
                    131:                manpath_parseline(&conf->manpath, insert + 1, 0);
1.8       kristaps  132:                return;
                    133:        }
                    134:
                    135:        /* MANPATH overrides man.conf(5) completely. */
1.23      schwarze  136:        manpath_parseline(&conf->manpath, defp, 0);
1.6       kristaps  137: #endif
1.1       kristaps  138: }
                    139:
                    140: /*
                    141:  * Parse a FULL pathname from a colon-separated list of arrays.
                    142:  */
1.6       kristaps  143: static void
1.18      schwarze  144: manpath_parseline(struct manpaths *dirs, char *path, int complain)
1.1       kristaps  145: {
                    146:        char    *dir;
                    147:
                    148:        if (NULL == path)
                    149:                return;
                    150:
                    151:        for (dir = strtok(path, ":"); dir; dir = strtok(NULL, ":"))
1.18      schwarze  152:                manpath_add(dirs, dir, complain);
1.1       kristaps  153: }
                    154:
                    155: /*
                    156:  * Add a directory to the array, ignoring bad directories.
                    157:  * Grow the array one-by-one for simplicity's sake.
                    158:  */
                    159: static void
1.18      schwarze  160: manpath_add(struct manpaths *dirs, const char *dir, int complain)
1.1       kristaps  161: {
                    162:        char             buf[PATH_MAX];
1.18      schwarze  163:        struct stat      sb;
1.1       kristaps  164:        char            *cp;
1.9       kristaps  165:        size_t           i;
1.1       kristaps  166:
1.18      schwarze  167:        if (NULL == (cp = realpath(dir, buf))) {
                    168:                if (complain) {
                    169:                        fputs("manpath: ", stderr);
                    170:                        perror(dir);
                    171:                }
1.1       kristaps  172:                return;
1.18      schwarze  173:        }
1.1       kristaps  174:
                    175:        for (i = 0; i < dirs->sz; i++)
                    176:                if (0 == strcmp(dirs->paths[i], dir))
                    177:                        return;
                    178:
1.18      schwarze  179:        if (stat(cp, &sb) == -1) {
                    180:                if (complain) {
                    181:                        fputs("manpath: ", stderr);
                    182:                        perror(dir);
                    183:                }
                    184:                return;
                    185:        }
                    186:
1.15      schwarze  187:        dirs->paths = mandoc_reallocarray(dirs->paths,
                    188:            dirs->sz + 1, sizeof(char *));
1.1       kristaps  189:
                    190:        dirs->paths[dirs->sz++] = mandoc_strdup(cp);
1.2       kristaps  191: }
                    192:
                    193: void
1.23      schwarze  194: manconf_free(struct manconf *conf)
1.2       kristaps  195: {
1.9       kristaps  196:        size_t           i;
1.2       kristaps  197:
1.23      schwarze  198:        for (i = 0; i < conf->manpath.sz; i++)
                    199:                free(conf->manpath.paths[i]);
1.2       kristaps  200:
1.23      schwarze  201:        free(conf->manpath.paths);
                    202:        free(conf->output.includes);
                    203:        free(conf->output.man);
                    204:        free(conf->output.paper);
                    205:        free(conf->output.style);
1.2       kristaps  206: }
                    207:
1.26    ! schwarze  208: #if !HAVE_MANPATH
1.23      schwarze  209: static void
                    210: manconf_file(struct manconf *conf, const char *file)
1.2       kristaps  211: {
1.23      schwarze  212:        const char *const toks[] = { "manpath", "output", "_whatdb" };
1.25      schwarze  213:        char manpath_default[] = MANPATH_DEFAULT;
1.22      schwarze  214:
1.2       kristaps  215:        FILE            *stream;
1.22      schwarze  216:        char            *cp, *ep;
                    217:        size_t           len, tok;
1.1       kristaps  218:
1.22      schwarze  219:        if ((stream = fopen(file, "r")) == NULL)
1.25      schwarze  220:                goto out;
1.1       kristaps  221:
1.22      schwarze  222:        while ((cp = fgetln(stream, &len)) != NULL) {
                    223:                ep = cp + len;
                    224:                if (ep[-1] != '\n')
1.1       kristaps  225:                        break;
1.22      schwarze  226:                *--ep = '\0';
                    227:                while (isspace((unsigned char)*cp))
                    228:                        cp++;
                    229:                if (*cp == '#')
1.1       kristaps  230:                        continue;
1.22      schwarze  231:
                    232:                for (tok = 0; tok < sizeof(toks)/sizeof(toks[0]); tok++) {
                    233:                        len = strlen(toks[tok]);
                    234:                        if (cp + len < ep &&
                    235:                            isspace((unsigned char)cp[len]) &&
                    236:                            !strncmp(cp, toks[tok], len)) {
                    237:                                cp += len;
                    238:                                while (isspace((unsigned char)*cp))
                    239:                                        cp++;
                    240:                                break;
                    241:                        }
                    242:                }
                    243:
                    244:                switch (tok) {
1.23      schwarze  245:                case 2:  /* _whatdb */
1.22      schwarze  246:                        while (ep > cp && ep[-1] != '/')
                    247:                                ep--;
                    248:                        if (ep == cp)
                    249:                                continue;
                    250:                        *ep = '\0';
                    251:                        /* FALLTHROUGH */
                    252:                case 0:  /* manpath */
1.23      schwarze  253:                        manpath_add(&conf->manpath, cp, 0);
1.25      schwarze  254:                        *manpath_default = '\0';
1.23      schwarze  255:                        break;
                    256:                case 1:  /* output */
                    257:                        manconf_output(&conf->output, cp);
1.22      schwarze  258:                        break;
                    259:                default:
                    260:                        break;
                    261:                }
1.1       kristaps  262:        }
1.25      schwarze  263:        fclose(stream);
1.1       kristaps  264:
1.25      schwarze  265: out:
                    266:        if (*manpath_default != '\0')
                    267:                manpath_parseline(&conf->manpath, manpath_default, 0);
1.23      schwarze  268: }
1.26    ! schwarze  269: #endif
1.23      schwarze  270:
                    271: void
                    272: manconf_output(struct manoutput *conf, const char *cp)
                    273: {
                    274:        const char *const toks[] = {
                    275:            "includes", "man", "paper", "style",
                    276:            "indent", "width", "fragment", "mdoc"
                    277:        };
                    278:
                    279:        size_t   len, tok;
                    280:
                    281:        for (tok = 0; tok < sizeof(toks)/sizeof(toks[0]); tok++) {
                    282:                len = strlen(toks[tok]);
                    283:                if ( ! strncmp(cp, toks[tok], len) &&
                    284:                    strchr(" =  ", cp[len]) != NULL) {
                    285:                        cp += len;
                    286:                        if (*cp == '=')
                    287:                                cp++;
                    288:                        while (isspace((unsigned char)*cp))
                    289:                                cp++;
                    290:                        break;
                    291:                }
                    292:        }
                    293:
                    294:        if (tok < 6 && *cp == '\0')
                    295:                return;
                    296:
                    297:        switch (tok) {
                    298:        case 0:
                    299:                if (conf->includes == NULL)
                    300:                        conf->includes = mandoc_strdup(cp);
                    301:                break;
                    302:        case 1:
                    303:                if (conf->man == NULL)
                    304:                        conf->man = mandoc_strdup(cp);
                    305:                break;
                    306:        case 2:
                    307:                if (conf->paper == NULL)
                    308:                        conf->paper = mandoc_strdup(cp);
                    309:                break;
                    310:        case 3:
                    311:                if (conf->style == NULL)
                    312:                        conf->style = mandoc_strdup(cp);
                    313:                break;
                    314:        case 4:
                    315:                if (conf->indent == 0)
                    316:                        conf->indent = strtonum(cp, 0, 1000, NULL);
                    317:                break;
                    318:        case 5:
                    319:                if (conf->width == 0)
                    320:                        conf->width = strtonum(cp, 58, 1000, NULL);
                    321:                break;
                    322:        case 6:
                    323:                conf->fragment = 1;
                    324:                break;
                    325:        case 7:
                    326:                conf->mdoc = 1;
                    327:                break;
                    328:        default:
                    329:                break;
                    330:        }
1.1       kristaps  331: }

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