/* $NetBSD: manconf.c,v 1.8 2014/02/17 02:53:48 uwe Exp $ */ /* * Copyright (c) 1989, 1993, 1995 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * manconf.c: provides interface for reading man.conf files * * note that this code is shared across all programs that read man.conf. * (currently: apropos, catman, makewhatis, man, and whatis...) */ #if HAVE_NBTOOL_CONFIG_H #include "nbtool_config.h" #endif #include <sys/cdefs.h> #ifndef lint #if 0 static char sccsid[] = "@(#)config.c 8.8 (Berkeley) 1/31/95"; #else __RCSID("$NetBSD: manconf.c,v 1.8 2014/02/17 02:53:48 uwe Exp $"); #endif #endif /* not lint */ #include <sys/types.h> #include <sys/queue.h> #include <ctype.h> #include <err.h> #include <errno.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include "manconf.h" #include "pathnames.h" TAILQ_HEAD(_head, _tag); static struct _head head; /* 'head' -- top level data structure */ /* * xstrdup: like strdup, but also returns length of string in lenp */ static char * xstrdup(const char *str, size_t *lenp) { size_t len; char *copy; len = strlen(str) + 1; copy = malloc(len); if (!copy) return NULL; (void)memcpy(copy, str, len); if (lenp) *lenp = len - 1; /* subtract out the null */ return copy; } /* * config -- * * Read the configuration file and build a doubly linked * list off of "head" that looks like: * * tag1 <-> entry <-> entry <-> entry * | * tag2 <-> entry <-> entry <-> entry * * note: will err/errx out on error (fopen or malloc failure) */ void config(const char *fname) { TAG *tp; FILE *cfp; size_t len; int lcnt; char *p, *t, type; if (fname == NULL) fname = _PATH_MANCONF; if ((cfp = fopen(fname, "r")) == NULL) err(EXIT_FAILURE, "%s", fname); TAILQ_INIT(&head); for (lcnt = 1; (p = fgetln(cfp, &len)) != NULL; ++lcnt) { if (len == 1) /* Skip empty lines. */ continue; if (p[len - 1] != '\n') { /* Skip corrupted lines. */ warnx("%s: line %d corrupted", fname, lcnt); continue; } p[len - 1] = '\0'; /* Terminate the line. */ /* Skip leading space. */ for (/*EMPTY*/; *p != '\0' && isspace((unsigned char)*p); ++p) continue; /* Skip empty/comment lines. */ if (*p == '\0' || *p == '#') continue; /* Find first token. */ for (t = p; *t && !isspace((unsigned char)*t); ++t) continue; if (*t == '\0') /* Need more than one token.*/ continue; *t = '\0'; tp = gettag(p, 1); if (!tp) errx(EXIT_FAILURE, "gettag: malloc failed"); /* * Attach new records. Check to see if it is a * section record or not. */ if (*p == '_') { /* not a section record */ /* * Special cases: _build and _crunch take the * rest of the line as a single entry. */ if (!strcmp(p, "_build") || !strcmp(p, "_crunch")) { const char *u; /* * The reason we're not just using * strtok(3) for all of the parsing is * so we don't get caught if a line * has only a single token on it. */ while (*++t && isspace((unsigned char)*t)); #ifndef HAVE_NBTOOL_CONFIG_H /* pre-verify user-supplied command format */ u = t; while (*u && !isspace((unsigned char)*u)) ++u; while (*u && isspace((unsigned char)*u)) ++u; if (fmtcheck(u, "%s") != u) { warnx("%s:%d: invalid %s command ignored", fname, lcnt, p); continue; } #endif /* !HAVE_NBTOOL_CONFIG_H */ if (addentry(tp, t, 0) == -1) errx(EXIT_FAILURE, "addentry: malloc failed"); } else { for (++t; (p = strtok(t, " \t\n")) != NULL; t = NULL) { if (addentry(tp, p, 0) == -1) errx(EXIT_FAILURE, "addentry: malloc failed"); } } } else { /* section record */ /* * section entries can either be all absolute * paths or all relative paths, but not both. */ type = (char)((TAILQ_FIRST(&tp->entrylist) != NULL) ? *(TAILQ_FIRST(&tp->entrylist)->s) : '\0'); for (++t; (p = strtok(t, " \t\n")) != NULL; t = NULL) { /* ensure an assigned type */ if (type == 0) type = *p; /* check for illegal mix */ if (*p != type) { warnx("section %s: %s: invalid entry, does not match previous types", tp->s, p); warnx("man.conf cannot mix absolute and relative paths in an entry"); continue; } if (addentry(tp, p, 0) == -1) errx(EXIT_FAILURE, "addentry: malloc failed"); } } } (void)fclose(cfp); } /* * gettag -- * if (!create) return tag for given name if it exists, or NULL otherwise * * if (create) return tag for given name if it exists, try and create * a new tag if it does not exist. return NULL if unable to create new * tag. */ TAG * gettag(const char *name, int create) { TAG *tp; TAILQ_FOREACH(tp, &head, q) if (!strcmp(name, tp->s)) return tp; if (!create) return NULL; /* try and add it in */ tp = malloc(sizeof(*tp)); if (tp) tp->s = xstrdup(name, &tp->len); if (!tp || !tp->s) { if (tp) free(tp); return NULL; } TAILQ_INIT(&tp->entrylist); TAILQ_INSERT_TAIL(&head, tp, q); return tp; } /* * addentry -- * add an entry to a list. * returns -1 if malloc failed, otherwise 0. */ int addentry(TAG *tp, const char *newent, int ishead) { ENTRY *ep; ep = malloc(sizeof(*ep)); if (ep) ep->s = xstrdup(newent, &ep->len); if (!ep || !ep->s) { if (ep) free(ep); return -1; } if (ishead) TAILQ_INSERT_HEAD(&tp->entrylist, ep, q); else TAILQ_INSERT_TAIL(&tp->entrylist, ep, q); return 0; }
