File: [cvsweb.bsd.lv] / mandoc / main.c (download)
Revision 1.189, Mon Sep 1 22:45:53 2014 UTC (9 years, 7 months ago) by schwarze
Branch: MAIN
Changes since 1.188: +6 -4 lines
In man(1) mode, change to the right directory before starting the parser,
just like traditional man(1) does, such that .so links have a chance to
work. After this point, we don't need the current directory for anything
else before exit, so we don't need to worry about getting back and we can
safely ignore failure.
|
/* $Id: main.c,v 1.189 2014/09/01 22:45:53 schwarze Exp $ */
/*
* Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2010, 2011, 2012, 2014 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_XHTML, /* -Txhtml */
OUTT_LINT, /* -Tlint */
OUTT_PS, /* -Tps */
OUTT_PDF /* -Tpdf */
};
struct curparse {
struct mparse *mp;
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 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 *);
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 const char *progname;
int
main(int argc, char *argv[])
{
struct curparse curp;
struct mansearch search;
struct manpaths paths;
char *conf_file, *defpaths, *auxpaths;
char *defos;
#if HAVE_SQLITE3
struct manpage *res, *resp;
size_t isec, i, sz;
int prio, best_prio;
char sec;
#endif
enum mandoclevel rc;
enum outmode outmode;
int show_usage;
int use_pager;
int options;
int c;
progname = strrchr(argv[0], '/');
if (progname == NULL)
progname = argv[0];
else
++progname;
/* Search options. */
memset(&paths, 0, sizeof(struct manpaths));
conf_file = defpaths = auxpaths = NULL;
memset(&search, 0, sizeof(struct mansearch));
search.outkey = "Nd";
if (strcmp(progname, "man") == 0)
search.argmode = ARG_NAME;
else if (strncmp(progname, "apropos", 7) == 0)
search.argmode = ARG_EXPR;
else if (strncmp(progname, "whatis", 6) == 0)
search.argmode = ARG_WORD;
else
search.argmode = ARG_FILE;
/* Parser and formatter options. */
memset(&curp, 0, sizeof(struct curparse));
curp.outtype = OUTT_ASCII;
curp.wlevel = MANDOCLEVEL_FATAL;
options = MPARSE_SO;
defos = NULL;
use_pager = 1;
show_usage = 0;
outmode = OUTMODE_DEF;
while (-1 != (c = getopt(argc, argv, "aC:cfI:iklM: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 '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':
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;
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
/* Quirk for a man(1) section argument without -s. */
if (search.argmode == ARG_NAME &&
argv[0] != NULL &&
isdigit((unsigned char)argv[0][0]) &&
(argv[0][1] == '\0' || !strcmp(argv[0], "3p"))) {
search.sec = argv[0];
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);
/* 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);
resp = res;
if (sz == 0) {
if (search.argmode == ARG_NAME)
fprintf(stderr, "%s: No entry for %s "
"in the manual.\n", progname, argv[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. */
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 ( ! moptions(&options, auxpaths))
return((int)MANDOCLEVEL_BADARG);
if (use_pager && isatty(STDOUT_FILENO))
spawn_pager();
curp.mp = mparse_alloc(options, curp.wlevel, mmsg, defos);
/*
* Conditionally start up the lookaside buffer before parsing.
*/
if (OUTT_MAN == curp.outtype)
mparse_keep(curp.mp);
if (argc == 0)
parse(&curp, STDIN_FILENO, "<stdin>", &rc);
while (argc) {
#if HAVE_SQLITE3
if (resp != NULL) {
if (resp->form) {
/* For .so only; ignore failure. */
chdir(paths.paths[resp->ipath]);
parse(&curp, -1, resp->file, &rc);
} else
rc = passthrough(resp->file);
resp++;
} else
#endif
parse(&curp, -1, *argv++, &rc);
if (MANDOCLEVEL_OK != rc && curp.wstop)
break;
argc--;
}
if (curp.outfree)
(*curp.outfree)(curp.outdata);
if (curp.mp)
mparse_free(curp.mp);
#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 [-acfklV] [-Ios=name] "
"[-mformat] [-Ooption] [-Toutput] [-Wlevel]\n"
"\t [file ...]\n", stderr);
break;
case ARG_NAME:
fputs("usage: man [-acfhklVw] [-C file] "
"[-M path] [-m path] [-S arch] [-s section]\n"
"\t [section] name ...\n", stderr);
break;
case ARG_WORD:
fputs("usage: whatis [-acfklVw] [-C file] "
"[-M path] [-m path] [-O outkey] [-S arch]\n"
"\t [-s section] name ...\n", stderr);
break;
case ARG_EXPR:
fputs("usage: apropos [-acfklVw] [-C file] "
"[-M path] [-m path] [-O outkey] [-S arch]\n"
"\t [-s section] expression ...\n", stderr);
break;
}
exit((int)MANDOCLEVEL_BADARG);
}
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_XHTML:
curp->outdata = xhtml_alloc(curp->outopts);
curp->outfree = html_free;
break;
case OUTT_HTML:
curp->outdata = html_alloc(curp->outopts);
curp->outfree = html_free;
break;
case OUTT_UTF8:
curp->outdata = utf8_alloc(curp->outopts);
curp->outfree = ascii_free;
break;
case OUTT_LOCALE:
curp->outdata = locale_alloc(curp->outopts);
curp->outfree = ascii_free;
break;
case OUTT_ASCII:
curp->outdata = ascii_alloc(curp->outopts);
curp->outfree = ascii_free;
break;
case OUTT_PDF:
curp->outdata = pdf_alloc(curp->outopts);
curp->outfree = pspdf_free;
break;
case OUTT_PS:
curp->outdata = ps_alloc(curp->outopts);
curp->outfree = pspdf_free;
break;
default:
break;
}
switch (curp->outtype) {
case OUTT_HTML:
/* FALLTHROUGH */
case OUTT_XHTML:
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:
mparse_reset(curp->mp);
if (*level < rc)
*level = rc;
}
static enum mandoclevel
passthrough(const char *file)
{
char buf[BUFSIZ];
const char *syscall;
ssize_t nr, nw, off;
int fd;
fd = open(file, O_RDONLY);
if (fd == -1) {
syscall = "open";
goto fail;
}
while ((nr = read(fd, buf, BUFSIZ)) != -1 && nr != 0)
for (off = 0; off < nr; off += nw)
if ((nw = write(STDOUT_FILENO, buf + off,
(size_t)(nr - off))) == -1 || nw == 0) {
syscall = "write";
goto fail;
}
if (nr == 0) {
close(fd);
return(MANDOCLEVEL_OK);
}
syscall = "read";
fail:
fprintf(stderr, "%s: %s: SYSERR: %s: %s",
progname, file, syscall, strerror(errno));
return(MANDOCLEVEL_SYSERR);
}
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_XHTML;
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);
}
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