737 lines
18 KiB
C
737 lines
18 KiB
C
/*
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* Copyright (c) 1987, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char copyright[] =
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"@(#) Copyright (c) 1987, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)man.c 8.16 (Berkeley) 4/16/94";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <fnmatch.h>
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#include <glob.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "config.h"
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#include "pathnames.h"
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int f_all, f_where;
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static void build_page __P((char *, char **));
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static void cat __P((char *));
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static char *check_pager __P((char *));
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static int cleanup __P((void));
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static void how __P((char *));
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static void jump __P((char **, char *, char *));
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static int manual __P((char *, TAG *, glob_t *));
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static void onsig __P((int));
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static void usage __P((void));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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extern char *optarg;
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extern int optind;
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TAG *defp, *defnewp, *section, *sectnewp, *subp;
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ENTRY *e_defp, *e_sectp, *e_subp, *ep;
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glob_t pg;
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size_t len;
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int ch, f_cat, f_how, found;
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char **ap, *cmd, *machine, *p, *p_add, *p_path, *pager, *slashp;
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char *conffile, buf[MAXPATHLEN * 2];
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f_cat = f_how = 0;
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conffile = p_add = p_path = NULL;
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while ((ch = getopt(argc, argv, "-aC:cfhkM:m:P:w")) != EOF)
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switch (ch) {
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case 'a':
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f_all = 1;
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break;
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case 'C':
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conffile = optarg;
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break;
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case 'c':
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case '-': /* Deprecated. */
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f_cat = 1;
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break;
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case 'h':
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f_how = 1;
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break;
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case 'm':
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p_add = optarg;
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break;
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case 'M':
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case 'P': /* Backward compatibility. */
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p_path = optarg;
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break;
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/*
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* The -f and -k options are backward compatible,
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* undocumented ways of calling whatis(1) and apropos(1).
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*/
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case 'f':
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jump(argv, "-f", "whatis");
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/* NOTREACHED */
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case 'k':
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jump(argv, "-k", "apropos");
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/* NOTREACHED */
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case 'w':
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f_all = f_where = 1;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (!*argv)
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usage();
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if (!f_cat && !f_how && !f_where)
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if (!isatty(1))
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f_cat = 1;
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else if ((pager = getenv("PAGER")) != NULL)
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pager = check_pager(pager);
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else
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pager = _PATH_PAGER;
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/* Read the configuration file. */
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config(conffile);
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/* Get the machine type. */
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if ((machine = getenv("MACHINE")) == NULL)
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machine = MACHINE;
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/* If there's no _default list, create an empty one. */
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if ((defp = getlist("_default")) == NULL)
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defp = addlist("_default");
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/*
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* 1: If the user specified a MANPATH variable, or set the -M
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* option, we replace the _default list with the user's list,
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* appending the entries in the _subdir list and the machine.
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*/
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if (p_path == NULL)
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p_path = getenv("MANPATH");
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if (p_path != NULL) {
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while ((e_defp = defp->list.tqh_first) != NULL) {
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free(e_defp->s);
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TAILQ_REMOVE(&defp->list, e_defp, q);
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}
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for (p = strtok(p_path, ":");
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p != NULL; p = strtok(NULL, ":")) {
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slashp = p[strlen(p) - 1] == '/' ? "" : "/";
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e_subp = (subp = getlist("_subdir")) == NULL ?
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NULL : subp->list.tqh_first;
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for (; e_subp != NULL; e_subp = e_subp->q.tqe_next) {
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(void)snprintf(buf, sizeof(buf), "%s%s%s{/%s,}",
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p, slashp, e_subp->s, machine);
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if ((ep = malloc(sizeof(ENTRY))) == NULL ||
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(ep->s = strdup(buf)) == NULL)
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err(1, NULL);
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TAILQ_INSERT_TAIL(&defp->list, ep, q);
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}
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}
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}
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/*
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* 2: If the user did not specify MANPATH, -M or a section, rewrite
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* the _default list to include the _subdir list and the machine.
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*/
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if (argv[1] == NULL)
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section = NULL;
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else if ((section = getlist(*argv)) != NULL)
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++argv;
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if (p_path == NULL && section == NULL) {
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defnewp = addlist("_default_new");
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e_defp =
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defp->list.tqh_first == NULL ? NULL : defp->list.tqh_first;
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for (; e_defp != NULL; e_defp = e_defp->q.tqe_next) {
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slashp =
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e_defp->s[strlen(e_defp->s) - 1] == '/' ? "" : "/";
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e_subp = (subp = getlist("_subdir")) == NULL ?
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NULL : subp->list.tqh_first;
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for (; e_subp != NULL; e_subp = e_subp->q.tqe_next) {
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(void)snprintf(buf, sizeof(buf), "%s%s%s{/%s,}",
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e_defp->s, slashp, e_subp->s, machine);
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if ((ep = malloc(sizeof(ENTRY))) == NULL ||
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(ep->s = strdup(buf)) == NULL)
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err(1, NULL);
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TAILQ_INSERT_TAIL(&defnewp->list, ep, q);
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}
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}
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defp = getlist("_default");
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while ((e_defp = defp->list.tqh_first) != NULL) {
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free(e_defp->s);
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TAILQ_REMOVE(&defp->list, e_defp, q);
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}
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free(defp->s);
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TAILQ_REMOVE(&head, defp, q);
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defnewp = getlist("_default_new");
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free(defnewp->s);
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defnewp->s = "_default";
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defp = defnewp;
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}
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/*
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* 3: If the user set the -m option, insert the user's list before
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* whatever list we have, again appending the _subdir list and
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* the machine.
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*/
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if (p_add != NULL)
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for (p = strtok(p_add, ":"); p != NULL; p = strtok(NULL, ":")) {
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slashp = p[strlen(p) - 1] == '/' ? "" : "/";
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e_subp = (subp = getlist("_subdir")) == NULL ?
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NULL : subp->list.tqh_first;
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for (; e_subp != NULL; e_subp = e_subp->q.tqe_next) {
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(void)snprintf(buf, sizeof(buf), "%s%s%s{/%s,}",
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p, slashp, e_subp->s, machine);
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if ((ep = malloc(sizeof(ENTRY))) == NULL ||
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(ep->s = strdup(buf)) == NULL)
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err(1, NULL);
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TAILQ_INSERT_HEAD(&defp->list, ep, q);
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}
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}
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/*
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* 4: If none of MANPATH, -M, or -m were specified, and a section was,
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* rewrite the section's paths (if they have a trailing slash) to
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* append the _subdir list and the machine. This then becomes the
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* _default list.
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*/
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if (p_path == NULL && p_add == NULL && section != NULL) {
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sectnewp = addlist("_section_new");
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for (e_sectp = section->list.tqh_first;
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e_sectp != NULL; e_sectp = e_sectp->q.tqe_next) {
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if (e_sectp->s[strlen(e_sectp->s) - 1] != '/') {
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(void)snprintf(buf, sizeof(buf),
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"%s{/%s,}", e_sectp->s, machine);
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if ((ep = malloc(sizeof(ENTRY))) == NULL ||
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(ep->s = strdup(buf)) == NULL)
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err(1, NULL);
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TAILQ_INSERT_TAIL(§newp->list, ep, q);
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continue;
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}
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e_subp = (subp = getlist("_subdir")) == NULL ?
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NULL : subp->list.tqh_first;
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for (; e_subp != NULL; e_subp = e_subp->q.tqe_next) {
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(void)snprintf(buf, sizeof(buf), "%s%s{/%s,}",
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e_sectp->s, e_subp->s, machine);
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if ((ep = malloc(sizeof(ENTRY))) == NULL ||
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(ep->s = strdup(buf)) == NULL)
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err(1, NULL);
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TAILQ_INSERT_TAIL(§newp->list, ep, q);
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}
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}
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sectnewp->s = section->s;
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defp = sectnewp;
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TAILQ_REMOVE(&head, section, q);
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}
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/*
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* 5: Search for the files. Set up an interrupt handler, so the
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* temporary files go away.
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*/
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(void)signal(SIGINT, onsig);
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(void)signal(SIGHUP, onsig);
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memset(&pg, 0, sizeof(pg));
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for (found = 0; *argv; ++argv)
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if (manual(*argv, defp, &pg))
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found = 1;
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/* 6: If nothing found, we're done. */
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if (!found) {
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(void)cleanup();
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exit (1);
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}
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/* 7: If it's simple, display it fast. */
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if (f_cat) {
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for (ap = pg.gl_pathv; *ap != NULL; ++ap) {
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if (**ap == '\0')
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continue;
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cat(*ap);
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}
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exit (cleanup());
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}
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if (f_how) {
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for (ap = pg.gl_pathv; *ap != NULL; ++ap) {
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if (**ap == '\0')
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continue;
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how(*ap);
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}
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exit(cleanup());
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}
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if (f_where) {
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for (ap = pg.gl_pathv; *ap != NULL; ++ap) {
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if (**ap == '\0')
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continue;
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(void)printf("%s\n", *ap);
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}
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exit(cleanup());
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}
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/*
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* 8: We display things in a single command; build a list of things
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* to display.
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*/
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for (ap = pg.gl_pathv, len = strlen(pager) + 1; *ap != NULL; ++ap) {
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if (**ap == '\0')
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continue;
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len += strlen(*ap) + 1;
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}
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if ((cmd = malloc(len)) == NULL) {
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warn(NULL);
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(void)cleanup();
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exit(1);
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}
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p = cmd;
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len = strlen(pager);
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memmove(p, pager, len);
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p += len;
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*p++ = ' ';
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for (ap = pg.gl_pathv; *ap != NULL; ++ap) {
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if (**ap == '\0')
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continue;
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len = strlen(*ap);
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memmove(p, *ap, len);
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p += len;
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*p++ = ' ';
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}
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*p = '\0';
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/* Use system(3) in case someone's pager is "pager arg1 arg2". */
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(void)system(cmd);
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exit(cleanup());
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}
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/*
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* manual --
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* Search the manuals for the pages.
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*/
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static int
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manual(page, tag, pg)
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char *page;
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TAG *tag;
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glob_t *pg;
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{
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ENTRY *ep, *e_sufp, *e_tag;
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TAG *missp, *sufp;
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int anyfound, cnt, found;
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char *p, buf[128];
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anyfound = 0;
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buf[0] = '*';
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/* For each element in the list... */
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e_tag = tag == NULL ? NULL : tag->list.tqh_first;
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for (; e_tag != NULL; e_tag = e_tag->q.tqe_next) {
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(void)snprintf(buf, sizeof(buf), "%s/%s.*", e_tag->s, page);
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if (glob(buf,
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GLOB_APPEND | GLOB_BRACE | GLOB_NOSORT | GLOB_QUOTE,
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NULL, pg)) {
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warn("globbing");
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(void)cleanup();
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exit(1);
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}
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if (pg->gl_matchc == 0)
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continue;
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/* Find out if it's really a man page. */
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for (cnt = pg->gl_pathc - pg->gl_matchc;
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cnt < pg->gl_pathc; ++cnt) {
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/*
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* Try the _suffix key words first.
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*
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* XXX
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* Older versions of man.conf didn't have the suffix
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* key words, it was assumed that everything was a .0.
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* We just test for .0 first, it's fast and probably
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* going to hit.
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*/
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(void)snprintf(buf, sizeof(buf), "*/%s.0", page);
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if (!fnmatch(buf, pg->gl_pathv[cnt], 0))
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goto next;
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e_sufp = (sufp = getlist("_suffix")) == NULL ?
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NULL : sufp->list.tqh_first;
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for (found = 0;
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e_sufp != NULL; e_sufp = e_sufp->q.tqe_next) {
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(void)snprintf(buf,
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sizeof(buf), "*/%s%s", page, e_sufp->s);
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if (!fnmatch(buf, pg->gl_pathv[cnt], 0)) {
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found = 1;
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break;
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}
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}
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if (found)
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goto next;
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/* Try the _build key words next. */
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e_sufp = (sufp = getlist("_build")) == NULL ?
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NULL : sufp->list.tqh_first;
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for (found = 0;
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e_sufp != NULL; e_sufp = e_sufp->q.tqe_next) {
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for (p = e_sufp->s;
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*p != '\0' && !isspace(*p); ++p);
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if (*p == '\0')
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continue;
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*p = '\0';
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(void)snprintf(buf,
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sizeof(buf), "*/%s%s", page, e_sufp->s);
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if (!fnmatch(buf, pg->gl_pathv[cnt], 0)) {
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if (!f_where)
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build_page(p + 1,
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&pg->gl_pathv[cnt]);
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*p = ' ';
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found = 1;
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break;
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}
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*p = ' ';
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}
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if (found) {
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next: anyfound = 1;
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if (!f_all) {
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/* Delete any other matches. */
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while (++cnt< pg->gl_pathc)
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pg->gl_pathv[cnt] = "";
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break;
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}
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continue;
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}
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/* It's not a man page, forget about it. */
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pg->gl_pathv[cnt] = "";
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}
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if (anyfound && !f_all)
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break;
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}
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/* If not found, enter onto the missing list. */
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if (!anyfound) {
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if ((missp = getlist("_missing")) == NULL)
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missp = addlist("_missing");
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if ((ep = malloc(sizeof(ENTRY))) == NULL ||
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(ep->s = strdup(page)) == NULL) {
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warn(NULL);
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(void)cleanup();
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exit(1);
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}
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TAILQ_INSERT_TAIL(&missp->list, ep, q);
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}
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return (anyfound);
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}
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/*
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* build_page --
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* Build a man page for display.
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*/
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static void
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build_page(fmt, pathp)
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char *fmt, **pathp;
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{
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static int warned;
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ENTRY *ep;
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TAG *intmpp;
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int fd, n;
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char *p, *b;
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char buf[MAXPATHLEN], cmd[MAXPATHLEN], tpath[sizeof(_PATH_TMP)];
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/* Let the user know this may take awhile. */
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if (!warned) {
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warned = 1;
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warnx("Formatting manual page...");
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}
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/*
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* Historically man chdir'd to the root of the man tree.
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* This was used in man pages that contained relative ".so"
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* directives (including other man pages for command aliases etc.)
|
|
* It even went one step farther, by examining the first line
|
|
* of the man page and parsing the .so filename so it would
|
|
* make hard(?) links to the cat'ted man pages for space savings.
|
|
* (We don't do that here, but we could).
|
|
*/
|
|
|
|
/* copy and find the end */
|
|
for (b = buf, p = *pathp; (*b++ = *p++) != '\0';)
|
|
continue;
|
|
|
|
/* skip the last two path components, page name and man[n] */
|
|
for (--b, n = 2; b != buf; b--)
|
|
if (*b == '/')
|
|
if (--n == 0) {
|
|
*b = '\0';
|
|
(void) chdir(buf);
|
|
}
|
|
|
|
/* Add a remove-when-done list. */
|
|
if ((intmpp = getlist("_intmp")) == NULL)
|
|
intmpp = addlist("_intmp");
|
|
|
|
/* Move to the printf(3) format string. */
|
|
for (; *fmt && isspace(*fmt); ++fmt)
|
|
continue;
|
|
|
|
/*
|
|
* Get a temporary file and build a version of the file
|
|
* to display. Replace the old file name with the new one.
|
|
*/
|
|
(void)strcpy(tpath, _PATH_TMP);
|
|
if ((fd = mkstemp(tpath)) == -1) {
|
|
warn("%s", tpath);
|
|
(void)cleanup();
|
|
exit(1);
|
|
}
|
|
(void)snprintf(buf, sizeof(buf), "%s > %s", fmt, tpath);
|
|
(void)snprintf(cmd, sizeof(cmd), buf, *pathp);
|
|
(void)system(cmd);
|
|
(void)close(fd);
|
|
if ((*pathp = strdup(tpath)) == NULL) {
|
|
warn(NULL);
|
|
(void)cleanup();
|
|
exit(1);
|
|
}
|
|
|
|
/* Link the built file into the remove-when-done list. */
|
|
if ((ep = malloc(sizeof(ENTRY))) == NULL) {
|
|
warn(NULL);
|
|
(void)cleanup();
|
|
exit(1);
|
|
}
|
|
ep->s = *pathp;
|
|
TAILQ_INSERT_TAIL(&intmpp->list, ep, q);
|
|
}
|
|
|
|
/*
|
|
* how --
|
|
* display how information
|
|
*/
|
|
static void
|
|
how(fname)
|
|
char *fname;
|
|
{
|
|
FILE *fp;
|
|
|
|
int lcnt, print;
|
|
char *p, buf[256];
|
|
|
|
if (!(fp = fopen(fname, "r"))) {
|
|
warn("%s", fname);
|
|
(void)cleanup();
|
|
exit (1);
|
|
}
|
|
#define S1 "SYNOPSIS"
|
|
#define S2 "S\bSY\bYN\bNO\bOP\bPS\bSI\bIS\bS"
|
|
#define D1 "DESCRIPTION"
|
|
#define D2 "D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN"
|
|
for (lcnt = print = 0; fgets(buf, sizeof(buf), fp);) {
|
|
if (!strncmp(buf, S1, sizeof(S1) - 1) ||
|
|
!strncmp(buf, S2, sizeof(S2) - 1)) {
|
|
print = 1;
|
|
continue;
|
|
} else if (!strncmp(buf, D1, sizeof(D1) - 1) ||
|
|
!strncmp(buf, D2, sizeof(D2) - 1))
|
|
return;
|
|
if (!print)
|
|
continue;
|
|
if (*buf == '\n')
|
|
++lcnt;
|
|
else {
|
|
for(; lcnt; --lcnt)
|
|
(void)putchar('\n');
|
|
for (p = buf; isspace(*p); ++p);
|
|
(void)fputs(p, stdout);
|
|
}
|
|
}
|
|
(void)fclose(fp);
|
|
}
|
|
|
|
/*
|
|
* cat --
|
|
* cat out the file
|
|
*/
|
|
static void
|
|
cat(fname)
|
|
char *fname;
|
|
{
|
|
int fd, n;
|
|
char buf[2048];
|
|
|
|
if ((fd = open(fname, O_RDONLY, 0)) < 0) {
|
|
warn("%s", fname);
|
|
(void)cleanup();
|
|
exit(1);
|
|
}
|
|
while ((n = read(fd, buf, sizeof(buf))) > 0)
|
|
if (write(STDOUT_FILENO, buf, n) != n) {
|
|
warn("write");
|
|
(void)cleanup();
|
|
exit (1);
|
|
}
|
|
if (n == -1) {
|
|
warn("read");
|
|
(void)cleanup();
|
|
exit(1);
|
|
}
|
|
(void)close(fd);
|
|
}
|
|
|
|
/*
|
|
* check_pager --
|
|
* check the user supplied page information
|
|
*/
|
|
static char *
|
|
check_pager(name)
|
|
char *name;
|
|
{
|
|
char *p, *save;
|
|
|
|
/*
|
|
* if the user uses "more", we make it "more -s"; watch out for
|
|
* PAGER = "mypager /usr/ucb/more"
|
|
*/
|
|
for (p = name; *p && !isspace(*p); ++p);
|
|
for (; p > name && *p != '/'; --p);
|
|
if (p != name)
|
|
++p;
|
|
|
|
/* make sure it's "more", not "morex" */
|
|
if (!strncmp(p, "more", 4) && (!p[4] || isspace(p[4]))){
|
|
save = name;
|
|
/* allocate space to add the "-s" */
|
|
if (!(name =
|
|
malloc((u_int)(strlen(save) + sizeof("-s") + 1))))
|
|
err(1, NULL);
|
|
(void)sprintf(name, "%s %s", save, "-s");
|
|
}
|
|
return(name);
|
|
}
|
|
|
|
/*
|
|
* jump --
|
|
* strip out flag argument and jump
|
|
*/
|
|
static void
|
|
jump(argv, flag, name)
|
|
char **argv, *flag, *name;
|
|
{
|
|
char **arg;
|
|
|
|
argv[0] = name;
|
|
for (arg = argv + 1; *arg; ++arg)
|
|
if (!strcmp(*arg, flag))
|
|
break;
|
|
for (; *arg; ++arg)
|
|
arg[0] = arg[1];
|
|
execvp(name, argv);
|
|
(void)fprintf(stderr, "%s: Command not found.\n", name);
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* onsig --
|
|
* If signaled, delete the temporary files.
|
|
*/
|
|
static void
|
|
onsig(signo)
|
|
int signo;
|
|
{
|
|
(void)cleanup();
|
|
|
|
(void)signal(signo, SIG_DFL);
|
|
(void)kill(getpid(), signo);
|
|
|
|
/* NOTREACHED */
|
|
exit (1);
|
|
}
|
|
|
|
/*
|
|
* cleanup --
|
|
* Clean up temporary files, show any error messages.
|
|
*/
|
|
static int
|
|
cleanup()
|
|
{
|
|
TAG *intmpp, *missp;
|
|
ENTRY *ep;
|
|
int rval;
|
|
|
|
rval = 0;
|
|
ep = (missp = getlist("_missing")) == NULL ?
|
|
NULL : missp->list.tqh_first;
|
|
if (ep != NULL)
|
|
for (; ep != NULL; ep = ep->q.tqe_next) {
|
|
warnx("no entry for %s in the manual.", ep->s);
|
|
rval = 1;
|
|
}
|
|
|
|
ep = (intmpp = getlist("_intmp")) == NULL ?
|
|
NULL : intmpp->list.tqh_first;
|
|
for (; ep != NULL; ep = ep->q.tqe_next)
|
|
(void)unlink(ep->s);
|
|
return (rval);
|
|
}
|
|
|
|
/*
|
|
* usage --
|
|
* print usage message and die
|
|
*/
|
|
static void
|
|
usage()
|
|
{
|
|
(void)fprintf(stderr,
|
|
"usage: man [-achw] [-C file] [-M path] [-m path] [section] title ...\n");
|
|
exit(1);
|
|
}
|