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Diffstat (limited to 'usr.bin/apropos/apropos.c')
| -rw-r--r-- | usr.bin/apropos/apropos.c | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/usr.bin/apropos/apropos.c b/usr.bin/apropos/apropos.c new file mode 100644 index 0000000..a0e0525 --- /dev/null +++ b/usr.bin/apropos/apropos.c @@ -0,0 +1,223 @@ +/* + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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. + */ + +#ifndef lint +static char copyright[] = +"@(#) Copyright (c) 1987, 1993, 1994\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +static char sccsid[] = "@(#)apropos.c 8.7 (Berkeley) 4/2/94"; +#endif /* not lint */ + +#include <sys/param.h> +#include <sys/queue.h> + +#include <ctype.h> +#include <err.h> +#include <limits.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "../man/config.h" +#include "../man/pathnames.h" + +static int *found, foundman; + +void apropos __P((char **, char *, int)); +void lowstr __P((char *, char *)); +int match __P((char *, char *)); +void usage __P((void)); + +int +main(argc, argv) + int argc; + char *argv[]; +{ + ENTRY *ep; + TAG *tp; + int ch, rv; + char *conffile, **p, *p_augment, *p_path; + + conffile = NULL; + p_augment = p_path = NULL; + while ((ch = getopt(argc, argv, "C:M:m:P:")) != EOF) + switch (ch) { + case 'C': + conffile = optarg; + break; + case 'M': + case 'P': /* backward compatible */ + p_path = optarg; + break; + case 'm': + p_augment = optarg; + break; + case '?': + default: + usage(); + } + argv += optind; + argc -= optind; + + if (argc < 1) + usage(); + + if ((found = malloc((u_int)argc * sizeof(int))) == NULL) + err(1, NULL); + memset(found, 0, argc * sizeof(int)); + + for (p = argv; *p; ++p) /* convert to lower-case */ + lowstr(*p, *p); + + if (p_augment) + apropos(argv, p_augment, 1); + if (p_path || (p_path = getenv("MANPATH"))) + apropos(argv, p_path, 1); + else { + config(conffile); + ep = (tp = getlist("_whatdb")) == NULL ? + NULL : tp->list.tqh_first; + for (; ep != NULL; ep = ep->q.tqe_next) + apropos(argv, ep->s, 0); + } + + if (!foundman) + errx(1, "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); + exit(rv); +} + +void +apropos(argv, path, buildpath) + char **argv, *path; + int buildpath; +{ + char *end, *name, **p; + char buf[LINE_MAX + 1], wbuf[LINE_MAX + 1]; + + for (name = path; name; name = end) { /* through name list */ + if (end = strchr(name, ':')) + *end++ = '\0'; + + if (buildpath) { + char hold[MAXPATHLEN + 1]; + + (void)sprintf(hold, "%s/%s", name, _PATH_WHATIS); + name = hold; + } + + if (!freopen(name, "r", stdin)) + continue; + + foundman = 1; + + /* for each file found */ + while (fgets(buf, sizeof(buf), stdin)) { + if (!strchr(buf, '\n')) { + warnx("%s: line too long", name); + continue; + } + lowstr(buf, wbuf); + for (p = argv; *p; ++p) + if (match(wbuf, *p)) { + (void)printf("%s", buf); + found[p - argv] = 1; + + /* only print line once */ + while (*++p) + if (match(wbuf, *p)) + found[p - argv] = 1; + break; + } + } + } +} + +/* + * match -- + * match anywhere the string appears + */ +int +match(bp, str) + char *bp, *str; +{ + int len; + char test; + + if (!*bp) + return (0); + /* backward compatible: everything matches empty string */ + if (!*str) + return (1); + for (test = *str++, len = strlen(str); *bp;) + if (test == *bp++ && !strncmp(bp, str, len)) + return (1); + return (0); +} + +/* + * lowstr -- + * convert a string to lower case + */ +void +lowstr(from, to) + char *from, *to; +{ + char ch; + + while ((ch = *from++) && ch != '\n') + *to++ = isupper(ch) ? tolower(ch) : ch; + *to = '\0'; +} + +/* + * usage -- + * print usage message and die + */ +void +usage() +{ + + (void)fprintf(stderr, + "usage: apropos [-C file] [-M path] [-m path] keyword ...\n"); + exit(1); +} |
