File: [cvsweb.bsd.lv] / mandoc / main.c (download)
Revision 1.221, Mon Feb 16 16:23:54 2015 UTC (9 years, 7 months ago) by schwarze
Branch: MAIN
Changes since 1.220: +5 -17 lines
Delete the -V option. It serves no purpose but keeps confusing people.
Keeping track of the versions of installed software is the job of
the package manager, not of the individual binaries. If individual
binaries include version numbers, that tends to goad people into
writing broken configuration tests that inspect version numbers
instead of properly testing for features.
|
/* $Id: main.c,v 1.221 2015/02/16 16:23:54 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 <sys/param.h> /* MACHINE */
#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 */
};
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 *);
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 *);
static enum mandoclevel passthrough(const char *, int, int);
static void spawn_pager(void);
static int toptions(struct curparse *, char *);
static void usage(enum argmode) __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;
struct manpage *res, *resp;
char *conf_file, *defpaths;
size_t isec, i, sz;
int prio, best_prio, synopsis_only;
char sec;
enum mandoclevel rc, rctmp;
enum outmode outmode;
int fd;
int show_usage;
int use_pager;
int options;
int c;
if (argc < 1)
progname = "mandoc";
else if ((progname = strrchr(argv[0], '/')) == 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));
conf_file = defpaths = NULL;
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_BADARG;
options = MPARSE_SO | MPARSE_UTF8 | MPARSE_LATIN1;
defos = NULL;
use_pager = 1;
show_usage = 0;
synopsis_only = 0;
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':
conf_file = optarg;
break;
case 'c':
use_pager = 0;
break;
case 'f':
search.argmode = ARG_WORD;
break;
case 'h':
(void)strlcat(curp.outopts, "synopsis,", BUFSIZ);
synopsis_only = 1;
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':
defpaths = optarg;
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;
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. */
if (argc > 0) {
argc -= optind;
argv += optind;
}
resp = NULL;
/*
* 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--;
}
if (search.arch == NULL)
search.arch = getenv("MACHINE");
if (search.arch == NULL)
search.arch = MACHINE;
}
rc = MANDOCLEVEL_OK;
/* man(1), whatis(1), apropos(1) */
if (search.argmode != ARG_FILE) {
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);
#if HAVE_SQLITE3
mansearch_setup(1);
if( ! mansearch(&search, &paths, argc, argv, &res, &sz))
usage(search.argmode);
#else
if (search.argmode != ARG_NAME) {
fputs("mandoc: database support not compiled in\n",
stderr);
return((int)MANDOCLEVEL_BADARG);
}
sz = 0;
#endif
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;
}
/* 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 < 1) {
if (use_pager && isatty(STDOUT_FILENO))
spawn_pager();
parse(&curp, STDIN_FILENO, "<stdin>", &rc);
}
while (argc > 0) {
rctmp = mparse_open(curp.mp, &fd,
resp != NULL ? resp->file : *argv);
if (rc < rctmp)
rc = rctmp;
if (fd != -1) {
if (use_pager && isatty(STDOUT_FILENO))
spawn_pager();
use_pager = 0;
if (resp == NULL)
parse(&curp, fd, *argv, &rc);
else if (resp->form & FORM_SRC) {
/* For .so only; ignore failure. */
chdir(paths.paths[resp->ipath]);
parse(&curp, fd, resp->file, &rc);
} else {
rctmp = passthrough(resp->file, fd,
synopsis_only);
if (rc < rctmp)
rc = rctmp;
}
rctmp = mparse_wait(curp.mp);
if (rc < rctmp)
rc = rctmp;
if (argc > 1 && curp.outtype <= OUTT_UTF8)
ascii_sepline(curp.outdata);
}
if (MANDOCLEVEL_OK != rc && curp.wstop)
break;
if (resp != NULL)
resp++;
else
argv++;
if (--argc)
mparse_reset(curp.mp);
}
if (curp.outfree)
(*curp.outfree)(curp.outdata);
mparse_free(curp.mp);
mchars_free(curp.mchars);
out:
if (search.argmode != ARG_FILE) {
manpath_free(&paths);
#if HAVE_SQLITE3
mansearch_free(res, sz);
mansearch_setup(0);
#endif
}
free(defos);
return((int)rc);
}
static void
usage(enum argmode argmode)
{
switch (argmode) {
case ARG_FILE:
fputs("usage: mandoc [-acfhkl] [-Ios=name] "
"[-Kencoding] [-mformat] [-Ooption]\n"
"\t [-Toutput] [-Wlevel] [file ...]\n", stderr);
break;
case ARG_NAME:
fputs("usage: man [-acfhklw] [-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 [-acfhklw] [-C file] "
"[-M path] [-m path] [-O outkey] [-S arch]\n"
"\t [-s section] name ...\n", stderr);
break;
case ARG_EXPR:
fputs("usage: apropos [-acfhklw] [-C file] "
"[-M path] [-m path] [-O outkey] [-S arch]\n"
"\t [-s section] expression ...\n", stderr);
break;
}
exit((int)MANDOCLEVEL_BADARG);
}
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:
#if HAVE_SQLITE3
fprintf(stderr, "%s: outdated mandoc.db lacks %s(%s) entry,\n"
" consider running # makewhatis %s\n",
progname, name, sec, paths->paths[ipath]);
#endif
*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--;
}
}
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);
/*
* 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;
}
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);
}
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[7];
toks[0] = "stop";
toks[1] = "all";
toks[2] = "warning";
toks[3] = "error";
toks[4] = "unsupp";
toks[5] = "fatal";
toks[6] = 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_UNSUPP;
break;
case 5:
curp->wlevel = MANDOCLEVEL_BADARG;
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);
}