File: [cvsweb.bsd.lv] / mandoc / main.c (download)
Revision 1.213, Tue Jan 13 23:17:52 2015 UTC (9 years, 5 months ago) by schwarze
Branch: MAIN
Changes since 1.212: +106 -5 lines
Be developer-friendly, 'cause OpenBSD devs like to:
cd /usr/src/share/man/man4; vi newdev.4 Makefile; make install; man newdev
When a manual is missing from an outdated database, let man(1)
show it anyway, using a KISS file system lookup as a fallback.
Requested by deraadt@.
87 new lines of code doesn't seem too much bloat to me.
Of course, keeping your mandoc.db(5) files up to date with makewhatis(8)
or weekly(8) is still required for apropos(1) to find your new pages.
|
/* $Id: main.c,v 1.213 2015/01/13 23:17:52 schwarze Exp $ */
/*
* Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2010-2012, 2014, 2015 Ingo Schwarze <schwarze@openbsd.org>
* Copyright (c) 2010 Joerg Sonnenberger <joerg@netbsd.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 <assert.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "mandoc.h"
#include "mandoc_aux.h"
#include "main.h"
#include "mdoc.h"
#include "man.h"
#include "manpath.h"
#include "mansearch.h"
#if !defined(__GNUC__) || (__GNUC__ < 2)
# if !defined(lint)
# define __attribute__(x)
# endif
#endif /* !defined(__GNUC__) || (__GNUC__ < 2) */
enum outmode {
OUTMODE_DEF = 0,
OUTMODE_FLN,
OUTMODE_LST,
OUTMODE_ALL,
OUTMODE_INT,
OUTMODE_ONE
};
typedef void (*out_mdoc)(void *, const struct mdoc *);
typedef void (*out_man)(void *, const struct man *);
typedef void (*out_free)(void *);
enum outt {
OUTT_ASCII = 0, /* -Tascii */
OUTT_LOCALE, /* -Tlocale */
OUTT_UTF8, /* -Tutf8 */
OUTT_TREE, /* -Ttree */
OUTT_MAN, /* -Tman */
OUTT_HTML, /* -Thtml */
OUTT_LINT, /* -Tlint */
OUTT_PS, /* -Tps */
OUTT_PDF /* -Tpdf */
};
struct curparse {
struct mparse *mp;
struct mchars *mchars; /* character table */
enum mandoclevel wlevel; /* ignore messages below this */
int wstop; /* stop after a file with a warning */
enum outt outtype; /* which output to use */
out_mdoc outmdoc; /* mdoc output ptr */
out_man outman; /* man output ptr */
out_free outfree; /* free output ptr */
void *outdata; /* data for output */
char outopts[BUFSIZ]; /* buf of output opts */
};
#if HAVE_SQLITE3
static int fs_lookup(const struct manpaths *,
size_t ipath, const char *,
const char *, const char *,
struct manpage **, size_t *);
static void fs_search(const struct mansearch *,
const struct manpaths *, int, char**,
struct manpage **, size_t *);
#endif
static int koptions(int *, char *);
#if HAVE_SQLITE3
int mandocdb(int, char**);
#endif
static int moptions(int *, char *);
static void mmsg(enum mandocerr, enum mandoclevel,
const char *, int, int, const char *);
static void parse(struct curparse *, int,
const char *, enum mandoclevel *);
#if HAVE_SQLITE3
static enum mandoclevel passthrough(const char *, int, int);
#endif
static void spawn_pager(void);
static int toptions(struct curparse *, char *);
static void usage(enum argmode) __attribute__((noreturn));
static void version(void) __attribute__((noreturn));
static int woptions(struct curparse *, char *);
static const int sec_prios[] = {1, 4, 5, 8, 6, 3, 7, 2, 9};
static char help_arg[] = "help";
static char *help_argv[] = {help_arg, NULL};
static const char *progname;
int
main(int argc, char *argv[])
{
struct curparse curp;
struct mansearch search;
struct manpaths paths;
char *auxpaths;
char *defos;
unsigned char *uc;
#if HAVE_SQLITE3
struct manpage *res, *resp;
char *conf_file, *defpaths;
size_t isec, i, sz;
int prio, best_prio, synopsis_only;
char sec;
#endif
enum mandoclevel rc;
enum outmode outmode;
int fd;
int show_usage;
int use_pager;
int options;
int c;
progname = strrchr(argv[0], '/');
if (progname == NULL)
progname = argv[0];
else
++progname;
#if HAVE_SQLITE3
if (strcmp(progname, BINM_MAKEWHATIS) == 0)
return(mandocdb(argc, argv));
#endif
/* Search options. */
memset(&paths, 0, sizeof(struct manpaths));
#if HAVE_SQLITE3
conf_file = defpaths = NULL;
#endif
auxpaths = NULL;
memset(&search, 0, sizeof(struct mansearch));
search.outkey = "Nd";
if (strcmp(progname, BINM_MAN) == 0)
search.argmode = ARG_NAME;
else if (strcmp(progname, BINM_APROPOS) == 0)
search.argmode = ARG_EXPR;
else if (strcmp(progname, BINM_WHATIS) == 0)
search.argmode = ARG_WORD;
else if (strncmp(progname, "help", 4) == 0)
search.argmode = ARG_NAME;
else
search.argmode = ARG_FILE;
/* Parser and formatter options. */
memset(&curp, 0, sizeof(struct curparse));
curp.outtype = OUTT_LOCALE;
curp.wlevel = MANDOCLEVEL_FATAL;
options = MPARSE_SO | MPARSE_UTF8 | MPARSE_LATIN1;
defos = NULL;
use_pager = 1;
show_usage = 0;
#if HAVE_SQLITE3
synopsis_only = 0;
#endif
outmode = OUTMODE_DEF;
while (-1 != (c = getopt(argc, argv,
"aC:cfhI:iK:klM:m:O:S:s:T:VW:w"))) {
switch (c) {
case 'a':
outmode = OUTMODE_ALL;
break;
case 'C':
#if HAVE_SQLITE3
conf_file = optarg;
#endif
break;
case 'c':
use_pager = 0;
break;
case 'f':
search.argmode = ARG_WORD;
break;
case 'h':
(void)strlcat(curp.outopts, "synopsis,", BUFSIZ);
#if HAVE_SQLITE3
synopsis_only = 1;
#endif
use_pager = 0;
outmode = OUTMODE_ALL;
break;
case 'I':
if (strncmp(optarg, "os=", 3)) {
fprintf(stderr,
"%s: -I %s: Bad argument\n",
progname, optarg);
return((int)MANDOCLEVEL_BADARG);
}
if (defos) {
fprintf(stderr,
"%s: -I %s: Duplicate argument\n",
progname, optarg);
return((int)MANDOCLEVEL_BADARG);
}
defos = mandoc_strdup(optarg + 3);
break;
case 'i':
outmode = OUTMODE_INT;
break;
case 'K':
if ( ! koptions(&options, optarg))
return((int)MANDOCLEVEL_BADARG);
break;
case 'k':
search.argmode = ARG_EXPR;
break;
case 'l':
search.argmode = ARG_FILE;
outmode = OUTMODE_ALL;
break;
case 'M':
#if HAVE_SQLITE3
defpaths = optarg;
#endif
break;
case 'm':
auxpaths = optarg;
break;
case 'O':
search.outkey = optarg;
(void)strlcat(curp.outopts, optarg, BUFSIZ);
(void)strlcat(curp.outopts, ",", BUFSIZ);
break;
case 'S':
search.arch = optarg;
break;
case 's':
search.sec = optarg;
break;
case 'T':
if ( ! toptions(&curp, optarg))
return((int)MANDOCLEVEL_BADARG);
break;
case 'W':
if ( ! woptions(&curp, optarg))
return((int)MANDOCLEVEL_BADARG);
break;
case 'w':
outmode = OUTMODE_FLN;
break;
case 'V':
version();
/* NOTREACHED */
default:
show_usage = 1;
break;
}
}
if (show_usage)
usage(search.argmode);
/* Postprocess options. */
if (outmode == OUTMODE_DEF) {
switch (search.argmode) {
case ARG_FILE:
outmode = OUTMODE_ALL;
use_pager = 0;
break;
case ARG_NAME:
outmode = OUTMODE_ONE;
break;
default:
outmode = OUTMODE_LST;
break;
}
}
/* Parse arguments. */
argc -= optind;
argv += optind;
#if HAVE_SQLITE3
resp = NULL;
#endif
/*
* Quirks for help(1)
* and for a man(1) section argument without -s.
*/
if (search.argmode == ARG_NAME) {
if (*progname == 'h') {
if (argc == 0) {
argv = help_argv;
argc = 1;
}
} else if (argc > 1 &&
((uc = argv[0]) != NULL) &&
((isdigit(uc[0]) && (uc[1] == '\0' ||
(isalpha(uc[1]) && uc[2] == '\0'))) ||
(uc[0] == 'n' && uc[1] == '\0'))) {
search.sec = uc;
argv++;
argc--;
}
}
rc = MANDOCLEVEL_OK;
/* man(1), whatis(1), apropos(1) */
if (search.argmode != ARG_FILE) {
#if HAVE_SQLITE3
if (argc == 0)
usage(search.argmode);
if (search.argmode == ARG_NAME &&
outmode == OUTMODE_ONE)
search.firstmatch = 1;
/* Access the mandoc database. */
manpath_parse(&paths, conf_file, defpaths, auxpaths);
mansearch_setup(1);
if( ! mansearch(&search, &paths, argc, argv, &res, &sz))
usage(search.argmode);
if (sz == 0 && search.argmode == ARG_NAME)
fs_search(&search, &paths, argc, argv, &res, &sz);
if (sz == 0) {
rc = MANDOCLEVEL_BADARG;
goto out;
}
/*
* For standard man(1) and -a output mode,
* prepare for copying filename pointers
* into the program parameter array.
*/
if (outmode == OUTMODE_ONE) {
argc = 1;
best_prio = 10;
} else if (outmode == OUTMODE_ALL)
argc = (int)sz;
/* Iterate all matching manuals. */
resp = res;
for (i = 0; i < sz; i++) {
if (outmode == OUTMODE_FLN)
puts(res[i].file);
else if (outmode == OUTMODE_LST)
printf("%s - %s\n", res[i].names,
res[i].output == NULL ? "" :
res[i].output);
else if (outmode == OUTMODE_ONE) {
/* Search for the best section. */
isec = strcspn(res[i].file, "123456789");
sec = res[i].file[isec];
if ('\0' == sec)
continue;
prio = sec_prios[sec - '1'];
if (prio >= best_prio)
continue;
best_prio = prio;
resp = res + i;
}
}
/*
* For man(1), -a and -i output mode, fall through
* to the main mandoc(1) code iterating files
* and running the parsers on each of them.
*/
if (outmode == OUTMODE_FLN || outmode == OUTMODE_LST)
goto out;
#else
fputs("mandoc: database support not compiled in\n",
stderr);
return((int)MANDOCLEVEL_BADARG);
#endif
}
/* mandoc(1) */
if (search.argmode == ARG_FILE && ! moptions(&options, auxpaths))
return((int)MANDOCLEVEL_BADARG);
curp.mchars = mchars_alloc();
curp.mp = mparse_alloc(options, curp.wlevel, mmsg,
curp.mchars, defos);
/*
* Conditionally start up the lookaside buffer before parsing.
*/
if (OUTT_MAN == curp.outtype)
mparse_keep(curp.mp);
if (argc == 0) {
if (use_pager && isatty(STDOUT_FILENO))
spawn_pager();
parse(&curp, STDIN_FILENO, "<stdin>", &rc);
}
while (argc) {
rc = mparse_open(curp.mp, &fd,
#if HAVE_SQLITE3
resp != NULL ? resp->file :
#endif
*argv);
if (fd != -1) {
if (use_pager && isatty(STDOUT_FILENO))
spawn_pager();
use_pager = 0;
#if HAVE_SQLITE3
if (resp == NULL)
#endif
parse(&curp, fd, *argv, &rc);
#if HAVE_SQLITE3
else if (resp->form & FORM_SRC) {
/* For .so only; ignore failure. */
chdir(paths.paths[resp->ipath]);
parse(&curp, fd, resp->file, &rc);
} else
rc = passthrough(resp->file, fd,
synopsis_only);
#endif
if (mparse_wait(curp.mp) != MANDOCLEVEL_OK)
rc = MANDOCLEVEL_SYSERR;
if (argc > 1 && curp.outtype <= OUTT_UTF8)
ascii_sepline(curp.outdata);
}
if (MANDOCLEVEL_OK != rc && curp.wstop)
break;
#if HAVE_SQLITE3
if (resp != NULL)
resp++;
else
#endif
argv++;
if (--argc)
mparse_reset(curp.mp);
}
if (curp.outfree)
(*curp.outfree)(curp.outdata);
mparse_free(curp.mp);
mchars_free(curp.mchars);
#if HAVE_SQLITE3
out:
if (search.argmode != ARG_FILE) {
manpath_free(&paths);
mansearch_free(res, sz);
mansearch_setup(0);
}
#endif
free(defos);
return((int)rc);
}
static void
version(void)
{
printf("mandoc %s\n", VERSION);
exit((int)MANDOCLEVEL_OK);
}
static void
usage(enum argmode argmode)
{
switch (argmode) {
case ARG_FILE:
fputs("usage: mandoc [-acfhklV] [-Ios=name] "
"[-Kencoding] [-mformat] [-Ooption]\n"
"\t [-Toutput] [-Wlevel] [file ...]\n", stderr);
break;
case ARG_NAME:
fputs("usage: man [-acfhklVw] [-C file] [-I os=name] "
"[-K encoding] [-M path] [-m path]\n"
"\t [-O option=value] [-S subsection] [-s section] "
"[-T output] [-W level]\n"
"\t [section] name ...\n", stderr);
break;
case ARG_WORD:
fputs("usage: whatis [-acfhklVw] [-C file] "
"[-M path] [-m path] [-O outkey] [-S arch]\n"
"\t [-s section] name ...\n", stderr);
break;
case ARG_EXPR:
fputs("usage: apropos [-acfhklVw] [-C file] "
"[-M path] [-m path] [-O outkey] [-S arch]\n"
"\t [-s section] expression ...\n", stderr);
break;
}
exit((int)MANDOCLEVEL_BADARG);
}
#if HAVE_SQLITE3
static int
fs_lookup(const struct manpaths *paths, size_t ipath,
const char *sec, const char *arch, const char *name,
struct manpage **res, size_t *ressz)
{
struct manpage *page;
char *file;
int form;
mandoc_asprintf(&file, "%s/man%s/%s.%s",
paths->paths[ipath], sec, name, sec);
if (access(file, R_OK) != -1) {
form = FORM_SRC;
goto found;
}
free(file);
mandoc_asprintf(&file, "%s/cat%s/%s.0",
paths->paths[ipath], sec, name);
if (access(file, R_OK) != -1) {
form = FORM_CAT;
goto found;
}
free(file);
if (arch != NULL) {
mandoc_asprintf(&file, "%s/man%s/%s/%s.%s",
paths->paths[ipath], sec, arch, name, sec);
if (access(file, R_OK) != -1) {
form = FORM_SRC;
goto found;
}
free(file);
}
return(0);
found:
fprintf(stderr, "%s: outdated mandoc.db lacks %s(%s) entry,\n"
" consider running # makewhatis %s\n",
progname, name, sec, paths->paths[ipath]);
*res = mandoc_reallocarray(*res, ++*ressz, sizeof(struct manpage));
page = *res + (*ressz - 1);
page->file = file;
page->names = NULL;
page->output = NULL;
page->ipath = ipath;
page->bits = NAME_FILE & NAME_MASK;
page->sec = (*sec >= '1' && *sec <= '9') ? *sec - '1' + 1 : 10;
page->form = form;
return(1);
}
static void
fs_search(const struct mansearch *cfg, const struct manpaths *paths,
int argc, char **argv, struct manpage **res, size_t *ressz)
{
const char *const sections[] =
{"1", "8", "6", "2", "3", "3p", "5", "7", "4", "9"};
const size_t nsec = sizeof(sections)/sizeof(sections[0]);
size_t ipath, isec, lastsz;
assert(cfg->argmode == ARG_NAME);
*res = NULL;
*ressz = lastsz = 0;
while (argc) {
for (ipath = 0; ipath < paths->sz; ipath++) {
if (cfg->sec != NULL) {
if (fs_lookup(paths, ipath, cfg->sec,
cfg->arch, *argv, res, ressz) &&
cfg->firstmatch)
return;
} else for (isec = 0; isec < nsec; isec++)
if (fs_lookup(paths, ipath, sections[isec],
cfg->arch, *argv, res, ressz) &&
cfg->firstmatch)
return;
}
if (*ressz == lastsz)
fprintf(stderr,
"%s: No entry for %s in the manual.\n",
progname, *argv);
lastsz = *ressz;
argv++;
argc--;
}
}
#endif
static void
parse(struct curparse *curp, int fd, const char *file,
enum mandoclevel *level)
{
enum mandoclevel rc;
struct mdoc *mdoc;
struct man *man;
/* Begin by parsing the file itself. */
assert(file);
assert(fd >= -1);
rc = mparse_readfd(curp->mp, fd, file);
/* Stop immediately if the parse has failed. */
if (MANDOCLEVEL_FATAL <= rc)
goto cleanup;
/*
* With -Wstop and warnings or errors of at least the requested
* level, do not produce output.
*/
if (MANDOCLEVEL_OK != rc && curp->wstop)
goto cleanup;
/* If unset, allocate output dev now (if applicable). */
if ( ! (curp->outman && curp->outmdoc)) {
switch (curp->outtype) {
case OUTT_HTML:
curp->outdata = html_alloc(curp->mchars,
curp->outopts);
curp->outfree = html_free;
break;
case OUTT_UTF8:
curp->outdata = utf8_alloc(curp->mchars,
curp->outopts);
curp->outfree = ascii_free;
break;
case OUTT_LOCALE:
curp->outdata = locale_alloc(curp->mchars,
curp->outopts);
curp->outfree = ascii_free;
break;
case OUTT_ASCII:
curp->outdata = ascii_alloc(curp->mchars,
curp->outopts);
curp->outfree = ascii_free;
break;
case OUTT_PDF:
curp->outdata = pdf_alloc(curp->mchars,
curp->outopts);
curp->outfree = pspdf_free;
break;
case OUTT_PS:
curp->outdata = ps_alloc(curp->mchars,
curp->outopts);
curp->outfree = pspdf_free;
break;
default:
break;
}
switch (curp->outtype) {
case OUTT_HTML:
curp->outman = html_man;
curp->outmdoc = html_mdoc;
break;
case OUTT_TREE:
curp->outman = tree_man;
curp->outmdoc = tree_mdoc;
break;
case OUTT_MAN:
curp->outmdoc = man_mdoc;
curp->outman = man_man;
break;
case OUTT_PDF:
/* FALLTHROUGH */
case OUTT_ASCII:
/* FALLTHROUGH */
case OUTT_UTF8:
/* FALLTHROUGH */
case OUTT_LOCALE:
/* FALLTHROUGH */
case OUTT_PS:
curp->outman = terminal_man;
curp->outmdoc = terminal_mdoc;
break;
default:
break;
}
}
mparse_result(curp->mp, &mdoc, &man, NULL);
/* Execute the out device, if it exists. */
if (man && curp->outman)
(*curp->outman)(curp->outdata, man);
if (mdoc && curp->outmdoc)
(*curp->outmdoc)(curp->outdata, mdoc);
cleanup:
if (*level < rc)
*level = rc;
}
#if HAVE_SQLITE3
static enum mandoclevel
passthrough(const char *file, int fd, int synopsis_only)
{
const char synb[] = "S\bSY\bYN\bNO\bOP\bPS\bSI\bIS\bS";
const char synr[] = "SYNOPSIS";
FILE *stream;
const char *syscall;
char *line;
size_t len, off;
ssize_t nw;
int print;
fflush(stdout);
if ((stream = fdopen(fd, "r")) == NULL) {
close(fd);
syscall = "fdopen";
goto fail;
}
print = 0;
while ((line = fgetln(stream, &len)) != NULL) {
if (synopsis_only) {
if (print) {
if ( ! isspace((unsigned char)*line))
goto done;
while (len &&
isspace((unsigned char)*line)) {
line++;
len--;
}
} else {
if ((len == sizeof(synb) &&
! strncmp(line, synb, len - 1)) ||
(len == sizeof(synr) &&
! strncmp(line, synr, len - 1)))
print = 1;
continue;
}
}
for (off = 0; off < len; off += nw)
if ((nw = write(STDOUT_FILENO, line + off,
len - off)) == -1 || nw == 0) {
fclose(stream);
syscall = "write";
goto fail;
}
}
if (ferror(stream)) {
fclose(stream);
syscall = "fgetln";
goto fail;
}
done:
fclose(stream);
return(MANDOCLEVEL_OK);
fail:
fprintf(stderr, "%s: %s: SYSERR: %s: %s",
progname, file, syscall, strerror(errno));
return(MANDOCLEVEL_SYSERR);
}
#endif
static int
koptions(int *options, char *arg)
{
if ( ! strcmp(arg, "utf-8")) {
*options |= MPARSE_UTF8;
*options &= ~MPARSE_LATIN1;
} else if ( ! strcmp(arg, "iso-8859-1")) {
*options |= MPARSE_LATIN1;
*options &= ~MPARSE_UTF8;
} else if ( ! strcmp(arg, "us-ascii")) {
*options &= ~(MPARSE_UTF8 | MPARSE_LATIN1);
} else {
fprintf(stderr, "%s: -K %s: Bad argument\n",
progname, arg);
return(0);
}
return(1);
}
static int
moptions(int *options, char *arg)
{
if (arg == NULL)
/* nothing to do */;
else if (0 == strcmp(arg, "doc"))
*options |= MPARSE_MDOC;
else if (0 == strcmp(arg, "andoc"))
/* nothing to do */;
else if (0 == strcmp(arg, "an"))
*options |= MPARSE_MAN;
else {
fprintf(stderr, "%s: -m %s: Bad argument\n",
progname, arg);
return(0);
}
return(1);
}
static int
toptions(struct curparse *curp, char *arg)
{
if (0 == strcmp(arg, "ascii"))
curp->outtype = OUTT_ASCII;
else if (0 == strcmp(arg, "lint")) {
curp->outtype = OUTT_LINT;
curp->wlevel = MANDOCLEVEL_WARNING;
} else if (0 == strcmp(arg, "tree"))
curp->outtype = OUTT_TREE;
else if (0 == strcmp(arg, "man"))
curp->outtype = OUTT_MAN;
else if (0 == strcmp(arg, "html"))
curp->outtype = OUTT_HTML;
else if (0 == strcmp(arg, "utf8"))
curp->outtype = OUTT_UTF8;
else if (0 == strcmp(arg, "locale"))
curp->outtype = OUTT_LOCALE;
else if (0 == strcmp(arg, "xhtml"))
curp->outtype = OUTT_HTML;
else if (0 == strcmp(arg, "ps"))
curp->outtype = OUTT_PS;
else if (0 == strcmp(arg, "pdf"))
curp->outtype = OUTT_PDF;
else {
fprintf(stderr, "%s: -T %s: Bad argument\n",
progname, arg);
return(0);
}
return(1);
}
static int
woptions(struct curparse *curp, char *arg)
{
char *v, *o;
const char *toks[6];
toks[0] = "stop";
toks[1] = "all";
toks[2] = "warning";
toks[3] = "error";
toks[4] = "fatal";
toks[5] = NULL;
while (*arg) {
o = arg;
switch (getsubopt(&arg, UNCONST(toks), &v)) {
case 0:
curp->wstop = 1;
break;
case 1:
/* FALLTHROUGH */
case 2:
curp->wlevel = MANDOCLEVEL_WARNING;
break;
case 3:
curp->wlevel = MANDOCLEVEL_ERROR;
break;
case 4:
curp->wlevel = MANDOCLEVEL_FATAL;
break;
default:
fprintf(stderr, "%s: -W %s: Bad argument\n",
progname, o);
return(0);
}
}
return(1);
}
static void
mmsg(enum mandocerr t, enum mandoclevel lvl,
const char *file, int line, int col, const char *msg)
{
const char *mparse_msg;
fprintf(stderr, "%s: %s:", progname, file);
if (line)
fprintf(stderr, "%d:%d:", line, col + 1);
fprintf(stderr, " %s", mparse_strlevel(lvl));
if (NULL != (mparse_msg = mparse_strerror(t)))
fprintf(stderr, ": %s", mparse_msg);
if (msg)
fprintf(stderr, ": %s", msg);
fputc('\n', stderr);
}
static void
spawn_pager(void)
{
#define MAX_PAGER_ARGS 16
char *argv[MAX_PAGER_ARGS];
const char *pager;
char *cp;
int fildes[2];
int argc;
if (pipe(fildes) == -1) {
fprintf(stderr, "%s: pipe: %s\n",
progname, strerror(errno));
return;
}
switch (fork()) {
case -1:
fprintf(stderr, "%s: fork: %s\n",
progname, strerror(errno));
exit((int)MANDOCLEVEL_SYSERR);
case 0:
close(fildes[0]);
if (dup2(fildes[1], STDOUT_FILENO) == -1) {
fprintf(stderr, "%s: dup output: %s\n",
progname, strerror(errno));
exit((int)MANDOCLEVEL_SYSERR);
}
return;
default:
break;
}
/* The original process becomes the pager. */
close(fildes[1]);
if (dup2(fildes[0], STDIN_FILENO) == -1) {
fprintf(stderr, "%s: dup input: %s\n",
progname, strerror(errno));
exit((int)MANDOCLEVEL_SYSERR);
}
pager = getenv("MANPAGER");
if (pager == NULL || *pager == '\0')
pager = getenv("PAGER");
if (pager == NULL || *pager == '\0')
pager = "/usr/bin/more -s";
cp = mandoc_strdup(pager);
/*
* Parse the pager command into words.
* Intentionally do not do anything fancy here.
*/
argc = 0;
while (argc + 1 < MAX_PAGER_ARGS) {
argv[argc++] = cp;
cp = strchr(cp, ' ');
if (cp == NULL)
break;
*cp++ = '\0';
while (*cp == ' ')
cp++;
if (*cp == '\0')
break;
}
argv[argc] = NULL;
/* Hand over to the pager. */
execvp(argv[0], argv);
fprintf(stderr, "%s: exec: %s\n",
progname, strerror(errno));
exit((int)MANDOCLEVEL_SYSERR);
}