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📄 arch.c(1.94 KB)
📄 att.c(1.62 KB)
📄 catman.8(4.49 KB)
📄 catman.c(5.52 KB)
📄 cgi.c(27.06 KB)
📄 cgi.h.example(220 B)
📄 chars.c(13.24 KB)
📄 compat_err.c(2.68 KB)
📄 compat_fts.c(17.42 KB)
📄 compat_fts.h(4.09 KB)
📄 compat_getline.c(1.59 KB)
📄 compat_getsubopt.c(2.89 KB)
📄 compat_isblank.c(986 B)
📄 compat_mkdtemp.c(1.59 KB)
📄 compat_ohash.c(6.82 KB)
📄 compat_ohash.h(2.63 KB)
📄 compat_progname.c(1.05 KB)
📄 compat_reallocarray.c(1.49 KB)
📄 compat_recallocarray.c(2.88 KB)
📄 compat_strcasestr.c(2.38 KB)
📄 compat_stringlist.c(2.71 KB)
📄 compat_stringlist.h(1.73 KB)
📄 compat_strlcat.c(1.71 KB)
📄 compat_strlcpy.c(1.59 KB)
📄 compat_strndup.c(1.3 KB)
📄 compat_strsep.c(2.55 KB)
📄 compat_strtonum.c(1.88 KB)
📄 compat_vasprintf.c(1.55 KB)
📄 config.h(1.33 KB)
📄 configure(17.5 KB)
📄 configure.local.example(11.37 KB)
📄 dba.c(13.02 KB)
📄 dba.h(1.73 KB)
📄 dba_array.c(4.23 KB)
📄 dba_array.h(2 KB)
📄 dba_read.c(2.33 KB)
📄 dba_write.c(2.42 KB)
📄 dba_write.h(1.23 KB)
📄 dbm.c(9.28 KB)
📄 dbm.h(1.94 KB)
📄 dbm_map.c(4.67 KB)
📄 dbm_map.h(1.2 KB)
📄 demandoc.1(2.64 KB)
📄 demandoc.c(5.21 KB)
📄 eqn.7(12.07 KB)
📄 eqn.c(27.21 KB)
📄 eqn.h(2.19 KB)
📄 eqn_html.c(5.91 KB)
📄 eqn_parse.h(1.96 KB)
📄 eqn_term.c(4.83 KB)
📄 gmdiff(1.74 KB)
📄 html.c(19.34 KB)
📄 html.h(3.86 KB)
📄 lib.c(1.07 KB)
📄 lib.in(8.96 KB)
📄 libman.h(1.66 KB)
📄 libmandoc.h(3.21 KB)
📄 libmdoc.h(2.97 KB)
📄 main.c(28.93 KB)
📄 main.h(2.06 KB)
📄 makewhatis.8(4.78 KB)
📄 man-cgi.css(464 B)
📄 man.1(9.33 KB)
📄 man.7(16.8 KB)
📄 man.c(8.62 KB)
📄 man.cgi.3(7.83 KB)
📄 man.cgi.8(11.02 KB)
📄 man.conf.5(3.92 KB)
📄 man.h(991 B)
📄 man.options.1(21.05 KB)
📄 man_html.c(13.39 KB)
📄 man_macro.c(11.4 KB)
📄 man_term.c(25.6 KB)
📄 man_validate.c(11.84 KB)
📄 manconf.h(1.56 KB)
📄 mandoc.1(54.89 KB)
📄 mandoc.3(12.5 KB)
📄 mandoc.c(12.41 KB)
📄 mandoc.css(8.63 KB)
📄 mandoc.db.5(5.74 KB)
📄 mandoc.h(14.92 KB)
📄 mandoc_aux.c(2.42 KB)
📄 mandoc_aux.h(1.31 KB)
📄 mandoc_char.7(29.23 KB)
📄 mandoc_escape.3(9.33 KB)
📄 mandoc_headers.3(12.41 KB)
📄 mandoc_html.3(7.42 KB)
📄 mandoc_malloc.3(4.46 KB)
📄 mandoc_msg.c(8.92 KB)
📄 mandoc_ohash.c(1.58 KB)
📄 mandoc_ohash.h(1004 B)
📄 mandoc_parse.h(1.82 KB)
📄 mandoc_xr.c(2.75 KB)
📄 mandoc_xr.h(1.17 KB)
📄 mandocd.8(4.59 KB)
📄 mandocd.c(5.98 KB)
📄 mandocdb.c(55.16 KB)
📄 manpath.c(7.73 KB)
📄 manpath.h(1.22 KB)
📄 mansearch.3(3.26 KB)
📄 mansearch.c(18.99 KB)
📄 mansearch.h(4.03 KB)
📄 mchars_alloc.3(5.24 KB)
📄 mdoc.7(73.34 KB)
📄 mdoc.c(9.99 KB)
📄 mdoc.h(3.96 KB)
📄 mdoc_argv.c(16.19 KB)
📄 mdoc_html.c(36.48 KB)
📄 mdoc_macro.c(39.55 KB)
📄 mdoc_man.c(37.07 KB)
📄 mdoc_markdown.c(33.41 KB)
📄 mdoc_state.c(5.24 KB)
📄 mdoc_term.c(43.69 KB)
📄 mdoc_validate.c(61.85 KB)
📄 msec.c(1.09 KB)
📄 msec.in(1.48 KB)
📄 out.c(13.61 KB)
📄 out.h(2.26 KB)
📄 preconv.c(3.84 KB)
📄 predefs.in(2.05 KB)
📄 read.c(16.44 KB)
📄 roff.7(61.96 KB)
📄 roff.c(98.93 KB)
📄 roff.h(8.85 KB)
📄 roff_html.c(2.92 KB)
📄 roff_int.h(4.08 KB)
📄 roff_term.c(5.36 KB)
📄 roff_validate.c(3.41 KB)
📄 soelim.1(2.6 KB)
📄 soelim.c(3.76 KB)
📄 st.c(4.33 KB)
📄 tag.c(6.65 KB)
📄 tag.h(1.09 KB)
📄 tbl.3(6.9 KB)
📄 tbl.7(10.91 KB)
📄 tbl.c(3.89 KB)
📄 tbl.h(4.43 KB)
📄 tbl_data.c(7.3 KB)
📄 tbl_html.c(5.74 KB)
📄 tbl_int.h(2.09 KB)
📄 tbl_layout.c(8.06 KB)
📄 tbl_opts.c(3.77 KB)
📄 tbl_parse.h(1.31 KB)
📄 tbl_term.c(24.42 KB)
📄 term.c(24.4 KB)
📄 term.h(6.14 KB)
📄 term_ascii.c(9.88 KB)
📄 term_ps.c(27.41 KB)
📄 term_tab.c(3 KB)
📄 test-EFTYPE.c(56 B)
📄 test-O_DIRECTORY.c(88 B)
📄 test-PATH_MAX.c(1.02 KB)
📄 test-be32toh.c(147 B)
📄 test-cmsg.c(174 B)
📄 test-dirent-namlen.c(124 B)
📄 test-err.c(994 B)
📄 test-fgetln.c(147 B)
📄 test-fts.c(964 B)
📄 test-getline.c(186 B)
📄 test-getsubopt.c(1.31 KB)
📄 test-isblank.c(96 B)
📄 test-mkdtemp.c(175 B)
📄 test-nanosleep.c(239 B)
📄 test-noop.c(30 B)
📄 test-ntohl.c(91 B)
📄 test-ohash.c(585 B)
📄 test-pledge.c(73 B)
📄 test-progname.c(118 B)
📄 test-reallocarray.c(75 B)
📄 test-recallocarray.c(132 B)
📄 test-recvmsg.c(100 B)
📄 test-rewb-bsd.c(618 B)
📄 test-rewb-sysv.c(610 B)
📄 test-sandbox_init.c(186 B)
📄 test-strcasestr.c(131 B)
📄 test-stringlist.c(1.14 KB)
📄 test-strlcat.c(166 B)
📄 test-strlcpy.c(148 B)
📄 test-strndup.c(141 B)
📄 test-strptime.c(212 B)
📄 test-strsep.c(183 B)
📄 test-strtonum.c(1.25 KB)
📄 test-vasprintf.c(1.25 KB)
📄 test-wchar.c(1.58 KB)
📄 tree.c(8.17 KB)

Editing: tag.c

/*	$Id: tag.c,v 1.24 2019/07/22 03:21:50 schwarze Exp $ */
/*
 * Copyright (c) 2015, 2016, 2018, 2019 Ingo Schwarze <schwarze@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#include "config.h"

#include <sys/types.h>

#include <errno.h>
#include <limits.h>
#include <signal.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "mandoc_aux.h"
#include "mandoc_ohash.h"
#include "mandoc.h"
#include "tag.h"

struct tag_entry {
	size_t	*lines;
	size_t	 maxlines;
	size_t	 nlines;
	int	 prio;
	char	 s[];
};

static	void	 tag_signal(int) __attribute__((__noreturn__));

static struct ohash	 tag_data;
static struct tag_files	 tag_files;

/*
 * Prepare for using a pager.
 * Not all pagers are capable of using a tag file,
 * but for simplicity, create it anyway.
 */
struct tag_files *
tag_init(void)
{
	struct sigaction	 sa;
	int			 ofd;

ofd = -1;
	tag_files.tfd = -1;
	tag_files.tcpgid = -1;

/* Clean up when dying from a signal. */

memset(&sa, 0, sizeof(sa));
	sigfillset(&sa.sa_mask);
	sa.sa_handler = tag_signal;
	sigaction(SIGHUP, &sa, NULL);
	sigaction(SIGINT, &sa, NULL);
	sigaction(SIGTERM, &sa, NULL);

/*
	 * POSIX requires that a process calling tcsetpgrp(3)
	 * from the background gets a SIGTTOU signal.
	 * In that case, do not stop.
	 */

sa.sa_handler = SIG_IGN;
	sigaction(SIGTTOU, &sa, NULL);

/* Save the original standard output for use by the pager. */

if ((tag_files.ofd = dup(STDOUT_FILENO)) == -1) {
		mandoc_msg(MANDOCERR_DUP, 0, 0, "%s", strerror(errno));
		goto fail;
	}

/* Create both temporary output files. */

(void)strlcpy(tag_files.ofn, "/tmp/man.XXXXXXXXXX",
	    sizeof(tag_files.ofn));
	(void)strlcpy(tag_files.tfn, "/tmp/man.XXXXXXXXXX",
	    sizeof(tag_files.tfn));
	if ((ofd = mkstemp(tag_files.ofn)) == -1) {
		mandoc_msg(MANDOCERR_MKSTEMP, 0, 0,
		    "%s: %s", tag_files.ofn, strerror(errno));
		goto fail;
	}
	if ((tag_files.tfd = mkstemp(tag_files.tfn)) == -1) {
		mandoc_msg(MANDOCERR_MKSTEMP, 0, 0,
		    "%s: %s", tag_files.tfn, strerror(errno));
		goto fail;
	}
	if (dup2(ofd, STDOUT_FILENO) == -1) {
		mandoc_msg(MANDOCERR_DUP, 0, 0, "%s", strerror(errno));
		goto fail;
	}
	close(ofd);

/*
	 * Set up the ohash table to collect output line numbers
	 * where various marked-up terms are documented.
	 */

mandoc_ohash_init(&tag_data, 4, offsetof(struct tag_entry, s));
	return &tag_files;

fail:
	tag_unlink();
	if (ofd != -1)
		close(ofd);
	if (tag_files.ofd != -1)
		close(tag_files.ofd);
	if (tag_files.tfd != -1)
		close(tag_files.tfd);
	*tag_files.ofn = '\0';
	*tag_files.tfn = '\0';
	tag_files.ofd = -1;
	tag_files.tfd = -1;
	return NULL;
}

/*
 * Set the line number where a term is defined,
 * unless it is already defined at a lower priority.
 */
void
tag_put(const char *s, int prio, size_t line)
{
	struct tag_entry	*entry;
	const char		*se;
	size_t			 len;
	unsigned int		 slot;

if (tag_files.tfd <= 0)
		return;

if (s[0] == '\\' && (s[1] == '&' || s[1] == 'e'))
		s += 2;

/*
	 * Skip whitespace and escapes and whatever follows,
	 * and if there is any, downgrade the priority.
	 */

len = strcspn(s, " \t\\");
	if (len == 0)
		return;

se = s + len;
	if (*se != '\0')
		prio = INT_MAX;

slot = ohash_qlookupi(&tag_data, s, &se);
	entry = ohash_find(&tag_data, slot);

if (entry == NULL) {

/* Build a new entry. */

entry = mandoc_malloc(sizeof(*entry) + len + 1);
		memcpy(entry->s, s, len);
		entry->s[len] = '\0';
		entry->lines = NULL;
		entry->maxlines = entry->nlines = 0;
		ohash_insert(&tag_data, slot, entry);

} else {

/*
		 * Lower priority numbers take precedence,
		 * but 0 is special.
		 * A tag with priority 0 is only used
		 * if the tag occurs exactly once.
		 */

if (prio == 0) {
			if (entry->prio == 0)
				entry->prio = -1;
			return;
		}

/* A better entry is already present, ignore the new one. */

if (entry->prio > 0 && entry->prio < prio)
			return;

/* The existing entry is worse, clear it. */

if (entry->prio < 1 || entry->prio > prio)
			entry->nlines = 0;
	}

/* Remember the new line. */

if (entry->maxlines == entry->nlines) {
		entry->maxlines += 4;
		entry->lines = mandoc_reallocarray(entry->lines,
		    entry->maxlines, sizeof(*entry->lines));
	}
	entry->lines[entry->nlines++] = line;
	entry->prio = prio;
}

/*
 * Write out the tags file using the previously collected
 * information and clear the ohash table while going along.
 */
void
tag_write(void)
{
	FILE			*stream;
	struct tag_entry	*entry;
	size_t			 i;
	unsigned int		 slot;
	int			 empty;

if (tag_files.tfd <= 0)
		return;
	if (tag_files.tagname != NULL && ohash_find(&tag_data,
            ohash_qlookup(&tag_data, tag_files.tagname)) == NULL) {
		mandoc_msg(MANDOCERR_TAG, 0, 0, "%s", tag_files.tagname);
		tag_files.tagname = NULL;
	}
	if ((stream = fdopen(tag_files.tfd, "w")) == NULL)
		mandoc_msg(MANDOCERR_FDOPEN, 0, 0, "%s", strerror(errno));
	empty = 1;
	entry = ohash_first(&tag_data, &slot);
	while (entry != NULL) {
		if (stream != NULL && entry->prio >= 0) {
			for (i = 0; i < entry->nlines; i++) {
				fprintf(stream, "%s %s %zu\n",
				    entry->s, tag_files.ofn, entry->lines[i]);
				empty = 0;
			}
		}
		free(entry->lines);
		free(entry);
		entry = ohash_next(&tag_data, &slot);
	}
	ohash_delete(&tag_data);
	if (stream != NULL)
		fclose(stream);
	else
		close(tag_files.tfd);
	tag_files.tfd = -1;
	if (empty) {
		unlink(tag_files.tfn);
		*tag_files.tfn = '\0';
	}
}

void
tag_unlink(void)
{
	pid_t	 tc_pgid;

if (tag_files.tcpgid != -1) {
		tc_pgid = tcgetpgrp(tag_files.ofd);
		if (tc_pgid == tag_files.pager_pid ||
		    tc_pgid == getpgid(0) ||
		    getpgid(tc_pgid) == -1)
			(void)tcsetpgrp(tag_files.ofd, tag_files.tcpgid);
	}
	if (*tag_files.ofn != '\0')
		unlink(tag_files.ofn);
	if (*tag_files.tfn != '\0')
		unlink(tag_files.tfn);
}

static void
tag_signal(int signum)
{
	struct sigaction	 sa;

tag_unlink();
	memset(&sa, 0, sizeof(sa));
	sigemptyset(&sa.sa_mask);
	sa.sa_handler = SIG_DFL;
	sigaction(signum, &sa, NULL);
	kill(getpid(), signum);
	/* NOTREACHED */
	_exit(1);
}

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Editing: tag.c

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