/* $NetBSD: apropos.c,v 1.30 2009/05/08 12:48:43 wiz Exp $ */ /* * Copyright (c) 1987, 1993, 1994 * 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. */ #include #ifndef lint __COPYRIGHT("@(#) Copyright (c) 1987, 1993, 1994\ The Regents of the University of California. All rights reserved."); #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)apropos.c 8.8 (Berkeley) 5/4/95"; #else __RCSID("$NetBSD: apropos.c,v 1.30 2009/05/08 12:48:43 wiz Exp $"); #endif #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include "manconf.h" /* from ../man/ */ #include "pathnames.h" /* from ../man/ */ static bool *found; static bool foundman = false; #define MAXLINELEN 8192 /* max line handled */ static void apropos(char **, const char *, bool, const char *, const char *); static void lowstr(const char *, char *); static bool match(const char *, const char *); static void usage(void) __dead; int main(int argc, char *argv[]) { ENTRY *ep; TAG *tp; int ch, rv; char *conffile, *machine, **p, *p_augment, *p_path, *sflag; glob_t pg; conffile = NULL; p_augment = p_path = NULL; machine = sflag = NULL; while ((ch = getopt(argc, argv, "C:M:m:P:S:s:")) != -1) { switch (ch) { case 'C': conffile = optarg; break; case 'M': case 'P': /* backward compatible */ p_path = optarg; break; case 'm': p_augment = optarg; break; case 'S': machine = optarg; lowstr(machine, machine); break; case 's': sflag = optarg; lowstr(sflag, sflag); break; case '?': default: usage(); } } argv += optind; argc -= optind; if (argc < 1) usage(); if ((found = malloc(argc * sizeof(*found))) == NULL) err(EXIT_FAILURE, "malloc"); (void)memset(found, 0, argc * sizeof(*found)); for (p = argv; *p; ++p) /* convert to lower-case */ lowstr(*p, *p); if (p_augment) apropos(argv, p_augment, true, sflag, machine); if (p_path || (p_path = getenv("MANPATH"))) apropos(argv, p_path, true, sflag, machine); else { config(conffile); tp = gettag("_whatdb", 1); if (!tp) errx(EXIT_FAILURE, "malloc"); TAILQ_FOREACH(ep, &tp->entrylist, q) { if ((rv = glob(ep->s, GLOB_BRACE | GLOB_NOSORT, NULL, &pg)) != 0) { if (rv == GLOB_NOMATCH) continue; else err(EXIT_FAILURE, "glob"); } if (pg.gl_pathc) for (p = pg.gl_pathv; *p; p++) apropos(argv, *p, false, sflag, machine); globfree(&pg); } } if (!foundman) errx(EXIT_FAILURE, "no %s file found", _PATH_WHATIS); rv = 1; for (p = argv; *p; ++p) if (found[p - argv]) rv = 0; else (void)printf("%s: nothing appropriate\n", *p); return rv; } static void apropos(char **argv, const char *path, bool buildpath, const char *sflag, const char *machine) { char *end, **p; const char *name; char buf[MAXLINELEN + 1]; char hold[MAXPATHLEN + 1]; char wbuf[MAXLINELEN + 1]; size_t slen = 0, mlen = 0; if (sflag) slen = strlen(sflag); if (machine) mlen = strlen(machine); for (name = path; name; name = end) { /* through name list */ if ((end = strchr(name, ':')) != NULL) *end++ = '\0'; if (buildpath) { (void)snprintf(hold, sizeof(hold), "%s/%s", name, _PATH_WHATIS); name = hold; } if (!freopen(name, "r", stdin)) continue; foundman = true; /* for each file found */ while (fgets(buf, (int)sizeof(buf), stdin)) { if (!strchr(buf, '\n')) { warnx("%s: line too long", name); continue; } lowstr(buf, wbuf); if (machine) { if ((strncmp(wbuf, machine, mlen) != 0) || strlen(wbuf) <= mlen || wbuf[mlen] != '/') continue; } if (sflag) { char *s = strchr(wbuf, '('); if (!s) continue; if (strncmp(s+1, sflag, slen) != 0) continue; } for (p = argv; *p; ++p) { if (match(wbuf, *p)) { (void)printf("%s", buf); found[p - argv] = true; /* only print line once */ while (*++p) if (match(wbuf, *p)) found[p - argv] = true; break; } } } } } /* * match -- * match anywhere the string appears */ static bool match(const char *bp, const char *str) { size_t len; char test; if (!*bp) return false; /* backward compatible: everything matches empty string */ if (!*str) return true; for (test = *str++, len = strlen(str); *bp;) if (test == *bp++ && !strncmp(bp, str, len)) return true; return false; } /* * lowstr -- * convert a string to lower case */ static void lowstr(const char *from, char *to) { char ch; while ((ch = *from++) && ch != '\n') *to++ = tolower((unsigned char)ch); *to = '\0'; } /* * usage -- * print usage message and die */ __dead static void usage(void) { (void)fprintf(stderr, "usage: %s [-C file] [-M path] [-m path] " "[-S subsection] [-s section]\n" " keyword ...\n", getprogname()); exit(1); }