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freebsd-nq/contrib/mandoc/mandocdb.c
Baptiste Daroussin 6d38604fc5 mandoc: import version 1.14.6 
MFC after: 3 weeks
2021-11-15 16:58:58 +01:00

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/* $Id: mandocdb.c,v 1.269 2021/08/19 16:55:31 schwarze Exp $ */
/*
* Copyright (c) 2011-2020 Ingo Schwarze <schwarze@openbsd.org>
* Copyright (c) 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2016 Ed Maste <emaste@freebsd.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 AUTHORS DISCLAIM ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS 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.
*
* Implementation of the makewhatis(8) program.
*/
#include "config.h"
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <assert.h>
#include <ctype.h>
#if HAVE_ERR
#include <err.h>
#endif
#include <errno.h>
#include <fcntl.h>
#if HAVE_FTS
#include <fts.h>
#else
#include "compat_fts.h"
#endif
#include <limits.h>
#if HAVE_SANDBOX_INIT
#include <sandbox.h>
#endif
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "mandoc_aux.h"
#include "mandoc_ohash.h"
#include "mandoc.h"
#include "roff.h"
#include "mdoc.h"
#include "man.h"
#include "mandoc_parse.h"
#include "manconf.h"
#include "mansearch.h"
#include "dba_array.h"
#include "dba.h"
extern const char *const mansearch_keynames[];
enum op {
OP_DEFAULT = 0, /* new dbs from dir list or default config */
OP_CONFFILE, /* new databases from custom config file */
OP_UPDATE, /* delete/add entries in existing database */
OP_DELETE, /* delete entries from existing database */
OP_TEST /* change no databases, report potential problems */
};
struct str {
const struct mpage *mpage; /* if set, the owning parse */
uint64_t mask; /* bitmask in sequence */
char key[]; /* rendered text */
};
struct inodev {
ino_t st_ino;
dev_t st_dev;
};
struct mpage {
struct inodev inodev; /* used for hashing routine */
struct dba_array *dba;
char *sec; /* section from file content */
char *arch; /* architecture from file content */
char *title; /* title from file content */
char *desc; /* description from file content */
struct mpage *next; /* singly linked list */
struct mlink *mlinks; /* singly linked list */
int name_head_done;
enum form form; /* format from file content */
};
struct mlink {
char file[PATH_MAX]; /* filename rel. to manpath */
char *dsec; /* section from directory */
char *arch; /* architecture from directory */
char *name; /* name from file name (not empty) */
char *fsec; /* section from file name suffix */
struct mlink *next; /* singly linked list */
struct mpage *mpage; /* parent */
int gzip; /* filename has a .gz suffix */
enum form dform; /* format from directory */
enum form fform; /* format from file name suffix */
};
typedef int (*mdoc_fp)(struct mpage *, const struct roff_meta *,
const struct roff_node *);
struct mdoc_handler {
mdoc_fp fp; /* optional handler */
uint64_t mask; /* set unless handler returns 0 */
int taboo; /* node flags that must not be set */
};
int mandocdb(int, char *[]);
static void dbadd(struct dba *, struct mpage *);
static void dbadd_mlink(const struct mlink *);
static void dbprune(struct dba *);
static void dbwrite(struct dba *);
static void filescan(const char *);
#if HAVE_FTS_COMPARE_CONST
static int fts_compare(const FTSENT *const *, const FTSENT *const *);
#else
static int fts_compare(const FTSENT **, const FTSENT **);
#endif
static void mlink_add(struct mlink *, const struct stat *);
static void mlink_check(struct mpage *, struct mlink *);
static void mlink_free(struct mlink *);
static void mlinks_undupe(struct mpage *);
static void mpages_free(void);
static void mpages_merge(struct dba *, struct mparse *);
static void parse_cat(struct mpage *, int);
static void parse_man(struct mpage *, const struct roff_meta *,
const struct roff_node *);
static void parse_mdoc(struct mpage *, const struct roff_meta *,
const struct roff_node *);
static int parse_mdoc_head(struct mpage *, const struct roff_meta *,
const struct roff_node *);
static int parse_mdoc_Fa(struct mpage *, const struct roff_meta *,
const struct roff_node *);
static int parse_mdoc_Fd(struct mpage *, const struct roff_meta *,
const struct roff_node *);
static void parse_mdoc_fname(struct mpage *, const struct roff_node *);
static int parse_mdoc_Fn(struct mpage *, const struct roff_meta *,
const struct roff_node *);
static int parse_mdoc_Fo(struct mpage *, const struct roff_meta *,
const struct roff_node *);
static int parse_mdoc_Nd(struct mpage *, const struct roff_meta *,
const struct roff_node *);
static int parse_mdoc_Nm(struct mpage *, const struct roff_meta *,
const struct roff_node *);
static int parse_mdoc_Sh(struct mpage *, const struct roff_meta *,
const struct roff_node *);
static int parse_mdoc_Va(struct mpage *, const struct roff_meta *,
const struct roff_node *);
static int parse_mdoc_Xr(struct mpage *, const struct roff_meta *,
const struct roff_node *);
static void putkey(const struct mpage *, char *, uint64_t);
static void putkeys(const struct mpage *, char *, size_t, uint64_t);
static void putmdockey(const struct mpage *,
const struct roff_node *, uint64_t, int);
#ifdef READ_ALLOWED_PATH
static int read_allowed(const char *);
#endif
static int render_string(char **, size_t *);
static void say(const char *, const char *, ...)
__attribute__((__format__ (__printf__, 2, 3)));
static int set_basedir(const char *, int);
static int treescan(void);
static size_t utf8(unsigned int, char [7]);
static int nodb; /* no database changes */
static int mparse_options; /* abort the parse early */
static int use_all; /* use all found files */
static int debug; /* print what we're doing */
static int warnings; /* warn about crap */
static int write_utf8; /* write UTF-8 output; else ASCII */
static int exitcode; /* to be returned by main */
static enum op op; /* operational mode */
static char basedir[PATH_MAX]; /* current base directory */
static size_t basedir_len; /* strlen(basedir) */
static struct mpage *mpage_head; /* list of distinct manual pages */
static struct ohash mpages; /* table of distinct manual pages */
static struct ohash mlinks; /* table of directory entries */
static struct ohash names; /* table of all names */
static struct ohash strings; /* table of all strings */
static uint64_t name_mask;
static const struct mdoc_handler mdoc_handlers[MDOC_MAX - MDOC_Dd] = {
{ NULL, 0, NODE_NOPRT }, /* Dd */
{ NULL, 0, NODE_NOPRT }, /* Dt */
{ NULL, 0, NODE_NOPRT }, /* Os */
{ parse_mdoc_Sh, TYPE_Sh, 0 }, /* Sh */
{ parse_mdoc_head, TYPE_Ss, 0 }, /* Ss */
{ NULL, 0, 0 }, /* Pp */
{ NULL, 0, 0 }, /* D1 */
{ NULL, 0, 0 }, /* Dl */
{ NULL, 0, 0 }, /* Bd */
{ NULL, 0, 0 }, /* Ed */
{ NULL, 0, 0 }, /* Bl */
{ NULL, 0, 0 }, /* El */
{ NULL, 0, 0 }, /* It */
{ NULL, 0, 0 }, /* Ad */
{ NULL, TYPE_An, 0 }, /* An */
{ NULL, 0, 0 }, /* Ap */
{ NULL, TYPE_Ar, 0 }, /* Ar */
{ NULL, TYPE_Cd, 0 }, /* Cd */
{ NULL, TYPE_Cm, 0 }, /* Cm */
{ NULL, TYPE_Dv, 0 }, /* Dv */
{ NULL, TYPE_Er, 0 }, /* Er */
{ NULL, TYPE_Ev, 0 }, /* Ev */
{ NULL, 0, 0 }, /* Ex */
{ parse_mdoc_Fa, 0, 0 }, /* Fa */
{ parse_mdoc_Fd, 0, 0 }, /* Fd */
{ NULL, TYPE_Fl, 0 }, /* Fl */
{ parse_mdoc_Fn, 0, 0 }, /* Fn */
{ NULL, TYPE_Ft | TYPE_Vt, 0 }, /* Ft */
{ NULL, TYPE_Ic, 0 }, /* Ic */
{ NULL, TYPE_In, 0 }, /* In */
{ NULL, TYPE_Li, 0 }, /* Li */
{ parse_mdoc_Nd, 0, 0 }, /* Nd */
{ parse_mdoc_Nm, 0, 0 }, /* Nm */
{ NULL, 0, 0 }, /* Op */
{ NULL, 0, 0 }, /* Ot */
{ NULL, TYPE_Pa, NODE_NOSRC }, /* Pa */
{ NULL, 0, 0 }, /* Rv */
{ NULL, TYPE_St, 0 }, /* St */
{ parse_mdoc_Va, TYPE_Va, 0 }, /* Va */
{ parse_mdoc_Va, TYPE_Vt, 0 }, /* Vt */
{ parse_mdoc_Xr, 0, 0 }, /* Xr */
{ NULL, 0, 0 }, /* %A */
{ NULL, 0, 0 }, /* %B */
{ NULL, 0, 0 }, /* %D */
{ NULL, 0, 0 }, /* %I */
{ NULL, 0, 0 }, /* %J */
{ NULL, 0, 0 }, /* %N */
{ NULL, 0, 0 }, /* %O */
{ NULL, 0, 0 }, /* %P */
{ NULL, 0, 0 }, /* %R */
{ NULL, 0, 0 }, /* %T */
{ NULL, 0, 0 }, /* %V */
{ NULL, 0, 0 }, /* Ac */
{ NULL, 0, 0 }, /* Ao */
{ NULL, 0, 0 }, /* Aq */
{ NULL, TYPE_At, 0 }, /* At */
{ NULL, 0, 0 }, /* Bc */
{ NULL, 0, 0 }, /* Bf */
{ NULL, 0, 0 }, /* Bo */
{ NULL, 0, 0 }, /* Bq */
{ NULL, TYPE_Bsx, NODE_NOSRC }, /* Bsx */
{ NULL, TYPE_Bx, NODE_NOSRC }, /* Bx */
{ NULL, 0, 0 }, /* Db */
{ NULL, 0, 0 }, /* Dc */
{ NULL, 0, 0 }, /* Do */
{ NULL, 0, 0 }, /* Dq */
{ NULL, 0, 0 }, /* Ec */
{ NULL, 0, 0 }, /* Ef */
{ NULL, TYPE_Em, 0 }, /* Em */
{ NULL, 0, 0 }, /* Eo */
{ NULL, TYPE_Fx, NODE_NOSRC }, /* Fx */
{ NULL, TYPE_Ms, 0 }, /* Ms */
{ NULL, 0, 0 }, /* No */
{ NULL, 0, 0 }, /* Ns */
{ NULL, TYPE_Nx, NODE_NOSRC }, /* Nx */
{ NULL, TYPE_Ox, NODE_NOSRC }, /* Ox */
{ NULL, 0, 0 }, /* Pc */
{ NULL, 0, 0 }, /* Pf */
{ NULL, 0, 0 }, /* Po */
{ NULL, 0, 0 }, /* Pq */
{ NULL, 0, 0 }, /* Qc */
{ NULL, 0, 0 }, /* Ql */
{ NULL, 0, 0 }, /* Qo */
{ NULL, 0, 0 }, /* Qq */
{ NULL, 0, 0 }, /* Re */
{ NULL, 0, 0 }, /* Rs */
{ NULL, 0, 0 }, /* Sc */
{ NULL, 0, 0 }, /* So */
{ NULL, 0, 0 }, /* Sq */
{ NULL, 0, 0 }, /* Sm */
{ NULL, 0, 0 }, /* Sx */
{ NULL, TYPE_Sy, 0 }, /* Sy */
{ NULL, TYPE_Tn, 0 }, /* Tn */
{ NULL, 0, NODE_NOSRC }, /* Ux */
{ NULL, 0, 0 }, /* Xc */
{ NULL, 0, 0 }, /* Xo */
{ parse_mdoc_Fo, 0, 0 }, /* Fo */
{ NULL, 0, 0 }, /* Fc */
{ NULL, 0, 0 }, /* Oo */
{ NULL, 0, 0 }, /* Oc */
{ NULL, 0, 0 }, /* Bk */
{ NULL, 0, 0 }, /* Ek */
{ NULL, 0, 0 }, /* Bt */
{ NULL, 0, 0 }, /* Hf */
{ NULL, 0, 0 }, /* Fr */
{ NULL, 0, 0 }, /* Ud */
{ NULL, TYPE_Lb, NODE_NOSRC }, /* Lb */
{ NULL, 0, 0 }, /* Lp */
{ NULL, TYPE_Lk, 0 }, /* Lk */
{ NULL, TYPE_Mt, NODE_NOSRC }, /* Mt */
{ NULL, 0, 0 }, /* Brq */
{ NULL, 0, 0 }, /* Bro */
{ NULL, 0, 0 }, /* Brc */
{ NULL, 0, 0 }, /* %C */
{ NULL, 0, 0 }, /* Es */
{ NULL, 0, 0 }, /* En */
{ NULL, TYPE_Dx, NODE_NOSRC }, /* Dx */
{ NULL, 0, 0 }, /* %Q */
{ NULL, 0, 0 }, /* %U */
{ NULL, 0, 0 }, /* Ta */
};
int
mandocdb(int argc, char *argv[])
{
struct manconf conf;
struct mparse *mp;
struct dba *dba;
const char *path_arg, *progname;
size_t j, sz;
int ch, i;
#if HAVE_PLEDGE
if (pledge("stdio rpath wpath cpath", NULL) == -1) {
warn("pledge");
return (int)MANDOCLEVEL_SYSERR;
}
#endif
#if HAVE_SANDBOX_INIT
if (sandbox_init(kSBXProfileNoInternet, SANDBOX_NAMED, NULL) == -1) {
warnx("sandbox_init");
return (int)MANDOCLEVEL_SYSERR;
}
#endif
memset(&conf, 0, sizeof(conf));
/*
* We accept a few different invocations.
* The CHECKOP macro makes sure that invocation styles don't
* clobber each other.
*/
#define CHECKOP(_op, _ch) do \
if ((_op) != OP_DEFAULT) { \
warnx("-%c: Conflicting option", (_ch)); \
goto usage; \
} while (/*CONSTCOND*/0)
mparse_options = MPARSE_VALIDATE;
path_arg = NULL;
op = OP_DEFAULT;
while ((ch = getopt(argc, argv, "aC:Dd:npQT:tu:v")) != -1)
switch (ch) {
case 'a':
use_all = 1;
break;
case 'C':
CHECKOP(op, ch);
path_arg = optarg;
op = OP_CONFFILE;
break;
case 'D':
debug++;
break;
case 'd':
CHECKOP(op, ch);
path_arg = optarg;
op = OP_UPDATE;
break;
case 'n':
nodb = 1;
break;
case 'p':
warnings = 1;
break;
case 'Q':
mparse_options |= MPARSE_QUICK;
break;
case 'T':
if (strcmp(optarg, "utf8") != 0) {
warnx("-T%s: Unsupported output format",
optarg);
goto usage;
}
write_utf8 = 1;
break;
case 't':
CHECKOP(op, ch);
dup2(STDOUT_FILENO, STDERR_FILENO);
op = OP_TEST;
nodb = warnings = 1;
break;
case 'u':
CHECKOP(op, ch);
path_arg = optarg;
op = OP_DELETE;
break;
case 'v':
/* Compatibility with espie@'s makewhatis. */
break;
default:
goto usage;
}
argc -= optind;
argv += optind;
#if HAVE_PLEDGE
if (nodb) {
if (pledge("stdio rpath", NULL) == -1) {
warn("pledge");
return (int)MANDOCLEVEL_SYSERR;
}
}
#endif
if (op == OP_CONFFILE && argc > 0) {
warnx("-C: Too many arguments");
goto usage;
}
exitcode = (int)MANDOCLEVEL_OK;
mchars_alloc();
mp = mparse_alloc(mparse_options, MANDOC_OS_OTHER, NULL);
mandoc_ohash_init(&mpages, 6, offsetof(struct mpage, inodev));
mandoc_ohash_init(&mlinks, 6, offsetof(struct mlink, file));
if (op == OP_UPDATE || op == OP_DELETE || op == OP_TEST) {
/*
* Most of these deal with a specific directory.
* Jump into that directory first.
*/
if (op != OP_TEST && set_basedir(path_arg, 1) == 0)
goto out;
dba = nodb ? dba_new(128) : dba_read(MANDOC_DB);
if (dba != NULL) {
/*
* The existing database is usable. Process
* all files specified on the command-line.
*/
use_all = 1;
for (i = 0; i < argc; i++)
filescan(argv[i]);
if (nodb == 0)
dbprune(dba);
} else {
/* Database missing or corrupt. */
if (op != OP_UPDATE || errno != ENOENT)
say(MANDOC_DB, "%s: Automatically recreating"
" from scratch", strerror(errno));
exitcode = (int)MANDOCLEVEL_OK;
op = OP_DEFAULT;
if (treescan() == 0)
goto out;
dba = dba_new(128);
}
if (op != OP_DELETE)
mpages_merge(dba, mp);
if (nodb == 0)
dbwrite(dba);
dba_free(dba);
} else {
/*
* If we have arguments, use them as our manpaths.
* If we don't, use man.conf(5).
*/
if (argc > 0) {
conf.manpath.paths = mandoc_reallocarray(NULL,
argc, sizeof(char *));
conf.manpath.sz = (size_t)argc;
for (i = 0; i < argc; i++)
conf.manpath.paths[i] = mandoc_strdup(argv[i]);
} else
manconf_parse(&conf, path_arg, NULL, NULL);
if (conf.manpath.sz == 0) {
exitcode = (int)MANDOCLEVEL_BADARG;
say("", "Empty manpath");
}
/*
* First scan the tree rooted at a base directory, then
* build a new database and finally move it into place.
* Ignore zero-length directories and strip trailing
* slashes.
*/
for (j = 0; j < conf.manpath.sz; j++) {
sz = strlen(conf.manpath.paths[j]);
if (sz && conf.manpath.paths[j][sz - 1] == '/')
conf.manpath.paths[j][--sz] = '\0';
if (sz == 0)
continue;
if (j) {
mandoc_ohash_init(&mpages, 6,
offsetof(struct mpage, inodev));
mandoc_ohash_init(&mlinks, 6,
offsetof(struct mlink, file));
}
if (set_basedir(conf.manpath.paths[j], argc > 0) == 0)
continue;
if (treescan() == 0)
continue;
dba = dba_new(128);
mpages_merge(dba, mp);
if (nodb == 0)
dbwrite(dba);
dba_free(dba);
if (j + 1 < conf.manpath.sz) {
mpages_free();
ohash_delete(&mpages);
ohash_delete(&mlinks);
}
}
}
out:
manconf_free(&conf);
mparse_free(mp);
mchars_free();
mpages_free();
ohash_delete(&mpages);
ohash_delete(&mlinks);
return exitcode;
usage:
progname = getprogname();
fprintf(stderr, "usage: %s [-aDnpQ] [-C file] [-Tutf8]\n"
" %s [-aDnpQ] [-Tutf8] dir ...\n"
" %s [-DnpQ] [-Tutf8] -d dir [file ...]\n"
" %s [-Dnp] -u dir [file ...]\n"
" %s [-Q] -t file ...\n",
progname, progname, progname, progname, progname);
return (int)MANDOCLEVEL_BADARG;
}
/*
* To get a singly linked list in alpha order while inserting entries
* at the beginning, process directory entries in reverse alpha order.
*/
static int
#if HAVE_FTS_COMPARE_CONST
fts_compare(const FTSENT *const *a, const FTSENT *const *b)
#else
fts_compare(const FTSENT **a, const FTSENT **b)
#endif
{
return -strcmp((*a)->fts_name, (*b)->fts_name);
}
/*
* Scan a directory tree rooted at "basedir" for manpages.
* We use fts(), scanning directory parts along the way for clues to our
* section and architecture.
*
* If use_all has been specified, grok all files.
* If not, sanitise paths to the following:
*
* [./]man*[/<arch>]/<name>.<section>
* or
* [./]cat<section>[/<arch>]/<name>.0
*
* TODO: accommodate for multi-language directories.
*/
static int
treescan(void)
{
char buf[PATH_MAX];
FTS *f;
FTSENT *ff;
struct mlink *mlink;
int gzip;
enum form dform;
char *dsec, *arch, *fsec, *cp;
const char *path;
const char *argv[2];
argv[0] = ".";
argv[1] = NULL;
f = fts_open((char * const *)argv, FTS_PHYSICAL | FTS_NOCHDIR,
fts_compare);
if (f == NULL) {
exitcode = (int)MANDOCLEVEL_SYSERR;
say("", "&fts_open");
return 0;
}
dsec = arch = NULL;
dform = FORM_NONE;
while ((ff = fts_read(f)) != NULL) {
path = ff->fts_path + 2;
switch (ff->fts_info) {
/*
* Symbolic links require various sanity checks,
* then get handled just like regular files.
*/
case FTS_SL:
if (realpath(path, buf) == NULL) {
if (warnings)
say(path, "&realpath");
continue;
}
if (strncmp(buf, basedir, basedir_len) != 0
#ifdef READ_ALLOWED_PATH
&& !read_allowed(buf)
#endif
) {
if (warnings) say("",
"%s: outside base directory", buf);
continue;
}
/* Use logical inode to avoid mpages dupe. */
if (stat(path, ff->fts_statp) == -1) {
if (warnings)
say(path, "&stat");
continue;
}
if ((ff->fts_statp->st_mode & S_IFMT) != S_IFREG)
continue;
/* FALLTHROUGH */
/*
* If we're a regular file, add an mlink by using the
* stored directory data and handling the filename.
*/
case FTS_F:
if ( ! strcmp(path, MANDOC_DB))
continue;
if ( ! use_all && ff->fts_level < 2) {
if (warnings)
say(path, "Extraneous file");
continue;
}
gzip = 0;
fsec = NULL;
while (fsec == NULL) {
fsec = strrchr(ff->fts_name, '.');
if (fsec == NULL || strcmp(fsec+1, "gz"))
break;
gzip = 1;
*fsec = '\0';
fsec = NULL;
}
if (fsec == NULL) {
if ( ! use_all) {
if (warnings)
say(path,
"No filename suffix");
continue;
}
} else if ( ! strcmp(++fsec, "html")) {
if (warnings)
say(path, "Skip html");
continue;
} else if ( ! strcmp(fsec, "ps")) {
if (warnings)
say(path, "Skip ps");
continue;
} else if ( ! strcmp(fsec, "pdf")) {
if (warnings)
say(path, "Skip pdf");
continue;
} else if ( ! use_all &&
((dform == FORM_SRC &&
strncmp(fsec, dsec, strlen(dsec))) ||
(dform == FORM_CAT && strcmp(fsec, "0")))) {
if (warnings)
say(path, "Wrong filename suffix");
continue;
} else
fsec[-1] = '\0';
mlink = mandoc_calloc(1, sizeof(struct mlink));
if (strlcpy(mlink->file, path,
sizeof(mlink->file)) >=
sizeof(mlink->file)) {
say(path, "Filename too long");
free(mlink);
continue;
}
mlink->dform = dform;
mlink->dsec = dsec;
mlink->arch = arch;
mlink->name = ff->fts_name;
mlink->fsec = fsec;
mlink->gzip = gzip;
mlink_add(mlink, ff->fts_statp);
continue;
case FTS_D:
case FTS_DP:
break;
default:
if (warnings)
say(path, "Not a regular file");
continue;
}
switch (ff->fts_level) {
case 0:
/* Ignore the root directory. */
break;
case 1:
/*
* This might contain manX/ or catX/.
* Try to infer this from the name.
* If we're not in use_all, enforce it.
*/
cp = ff->fts_name;
if (ff->fts_info == FTS_DP) {
dform = FORM_NONE;
dsec = NULL;
break;
}
if ( ! strncmp(cp, "man", 3)) {
dform = FORM_SRC;
dsec = cp + 3;
} else if ( ! strncmp(cp, "cat", 3)) {
dform = FORM_CAT;
dsec = cp + 3;
} else {
dform = FORM_NONE;
dsec = NULL;
}
if (dsec != NULL || use_all)
break;
if (warnings)
say(path, "Unknown directory part");
fts_set(f, ff, FTS_SKIP);
break;
case 2:
/*
* Possibly our architecture.
* If we're descending, keep tabs on it.
*/
if (ff->fts_info != FTS_DP && dsec != NULL)
arch = ff->fts_name;
else
arch = NULL;
break;
default:
if (ff->fts_info == FTS_DP || use_all)
break;
if (warnings)
say(path, "Extraneous directory part");
fts_set(f, ff, FTS_SKIP);
break;
}
}
fts_close(f);
return 1;
}
/*
* Add a file to the mlinks table.
* Do not verify that it's a "valid" looking manpage (we'll do that
* later).
*
* Try to infer the manual section, architecture, and page name from the
* path, assuming it looks like
*
* [./]man*[/<arch>]/<name>.<section>
* or
* [./]cat<section>[/<arch>]/<name>.0
*
* See treescan() for the fts(3) version of this.
*/
static void
filescan(const char *infile)
{
struct stat st;
struct mlink *mlink;
char *linkfile, *p, *realdir, *start, *usefile;
size_t realdir_len;
assert(use_all);
if (strncmp(infile, "./", 2) == 0)
infile += 2;
/*
* We have to do lstat(2) before realpath(3) loses
* the information whether this is a symbolic link.
* We need to know that because for symbolic links,
* we want to use the orginal file name, while for
* regular files, we want to use the real path.
*/
if (lstat(infile, &st) == -1) {
exitcode = (int)MANDOCLEVEL_BADARG;
say(infile, "&lstat");
return;
} else if (S_ISREG(st.st_mode) == 0 && S_ISLNK(st.st_mode) == 0) {
exitcode = (int)MANDOCLEVEL_BADARG;
say(infile, "Not a regular file");
return;
}
/*
* We have to resolve the file name to the real path
* in any case for the base directory check.
*/
if ((usefile = realpath(infile, NULL)) == NULL) {
exitcode = (int)MANDOCLEVEL_BADARG;
say(infile, "&realpath");
return;
}
if (op == OP_TEST)
start = usefile;
else if (strncmp(usefile, basedir, basedir_len) == 0)
start = usefile + basedir_len;
#ifdef READ_ALLOWED_PATH
else if (read_allowed(usefile))
start = usefile;
#endif
else {
exitcode = (int)MANDOCLEVEL_BADARG;
say("", "%s: outside base directory", infile);
free(usefile);
return;
}
/*
* Now we are sure the file is inside our tree.
* If it is a symbolic link, ignore the real path
* and use the original name.
*/
do {
if (S_ISLNK(st.st_mode) == 0)
break;
/*
* Some implementations of realpath(3) may succeed
* even if the target of the link does not exist,
* so check again for extra safety.
*/
if (stat(usefile, &st) == -1) {
exitcode = (int)MANDOCLEVEL_BADARG;
say(infile, "&stat");
free(usefile);
return;
}
linkfile = mandoc_strdup(infile);
if (op == OP_TEST) {
free(usefile);
start = usefile = linkfile;
break;
}
if (strncmp(infile, basedir, basedir_len) == 0) {
free(usefile);
usefile = linkfile;
start = usefile + basedir_len;
break;
}
/*
* This symbolic link points into the basedir
* from the outside. Let's see whether any of
* the parent directories resolve to the basedir.
*/
p = strchr(linkfile, '\0');
do {
while (*--p != '/')
continue;
*p = '\0';
if ((realdir = realpath(linkfile, NULL)) == NULL) {
exitcode = (int)MANDOCLEVEL_BADARG;
say(infile, "&realpath");
free(linkfile);
free(usefile);
return;
}
realdir_len = strlen(realdir) + 1;
free(realdir);
*p = '/';
} while (realdir_len > basedir_len);
/*
* If one of the directories resolves to the basedir,
* use the rest of the original name.
* Otherwise, the best we can do
* is to use the filename pointed to.
*/
if (realdir_len == basedir_len) {
free(usefile);
usefile = linkfile;
start = p + 1;
} else {
free(linkfile);
start = usefile + basedir_len;
}
} while (/* CONSTCOND */ 0);
mlink = mandoc_calloc(1, sizeof(struct mlink));
mlink->dform = FORM_NONE;
if (strlcpy(mlink->file, start, sizeof(mlink->file)) >=
sizeof(mlink->file)) {
say(start, "Filename too long");
free(mlink);
free(usefile);
return;
}
/*
* In test mode or when the original name is absolute
* but outside our tree, guess the base directory.
*/
if (op == OP_TEST || (start == usefile && *start == '/')) {
if (strncmp(usefile, "man/", 4) == 0)
start = usefile + 4;
else if ((start = strstr(usefile, "/man/")) != NULL)
start += 5;
else
start = usefile;
}
/*
* First try to guess our directory structure.
* If we find a separator, try to look for man* or cat*.
* If we find one of these and what's underneath is a directory,
* assume it's an architecture.
*/
if ((p = strchr(start, '/')) != NULL) {
*p++ = '\0';
if (strncmp(start, "man", 3) == 0) {
mlink->dform = FORM_SRC;
mlink->dsec = start + 3;
} else if (strncmp(start, "cat", 3) == 0) {
mlink->dform = FORM_CAT;
mlink->dsec = start + 3;
}
start = p;
if (mlink->dsec != NULL && (p = strchr(start, '/')) != NULL) {
*p++ = '\0';
mlink->arch = start;
start = p;
}
}
/*
* Now check the file suffix.
* Suffix of `.0' indicates a catpage, `.1-9' is a manpage.
*/
p = strrchr(start, '\0');
while (p-- > start && *p != '/' && *p != '.')
continue;
if (*p == '.') {
*p++ = '\0';
mlink->fsec = p;
}
/*
* Now try to parse the name.
* Use the filename portion of the path.
*/
mlink->name = start;
if ((p = strrchr(start, '/')) != NULL) {
mlink->name = p + 1;
*p = '\0';
}
mlink_add(mlink, &st);
free(usefile);
}
static void
mlink_add(struct mlink *mlink, const struct stat *st)
{
struct inodev inodev;
struct mpage *mpage;
unsigned int slot;
assert(NULL != mlink->file);
mlink->dsec = mandoc_strdup(mlink->dsec ? mlink->dsec : "");
mlink->arch = mandoc_strdup(mlink->arch ? mlink->arch : "");
mlink->name = mandoc_strdup(mlink->name ? mlink->name : "");
mlink->fsec = mandoc_strdup(mlink->fsec ? mlink->fsec : "");
if ('0' == *mlink->fsec) {
free(mlink->fsec);
mlink->fsec = mandoc_strdup(mlink->dsec);
mlink->fform = FORM_CAT;
} else if ('1' <= *mlink->fsec && '9' >= *mlink->fsec)
mlink->fform = FORM_SRC;
else
mlink->fform = FORM_NONE;
slot = ohash_qlookup(&mlinks, mlink->file);
assert(NULL == ohash_find(&mlinks, slot));
ohash_insert(&mlinks, slot, mlink);
memset(&inodev, 0, sizeof(inodev)); /* Clear padding. */
inodev.st_ino = st->st_ino;
inodev.st_dev = st->st_dev;
slot = ohash_lookup_memory(&mpages, (char *)&inodev,
sizeof(struct inodev), inodev.st_ino);
mpage = ohash_find(&mpages, slot);
if (NULL == mpage) {
mpage = mandoc_calloc(1, sizeof(struct mpage));
mpage->inodev.st_ino = inodev.st_ino;
mpage->inodev.st_dev = inodev.st_dev;
mpage->form = FORM_NONE;
mpage->next = mpage_head;
mpage_head = mpage;
ohash_insert(&mpages, slot, mpage);
} else
mlink->next = mpage->mlinks;
mpage->mlinks = mlink;
mlink->mpage = mpage;
}
static void
mlink_free(struct mlink *mlink)
{
free(mlink->dsec);
free(mlink->arch);
free(mlink->name);
free(mlink->fsec);
free(mlink);
}
static void
mpages_free(void)
{
struct mpage *mpage;
struct mlink *mlink;
while ((mpage = mpage_head) != NULL) {
while ((mlink = mpage->mlinks) != NULL) {
mpage->mlinks = mlink->next;
mlink_free(mlink);
}
mpage_head = mpage->next;
free(mpage->sec);
free(mpage->arch);
free(mpage->title);
free(mpage->desc);
free(mpage);
}
}
/*
* For each mlink to the mpage, check whether the path looks like
* it is formatted, and if it does, check whether a source manual
* exists by the same name, ignoring the suffix.
* If both conditions hold, drop the mlink.
*/
static void
mlinks_undupe(struct mpage *mpage)
{
char buf[PATH_MAX];
struct mlink **prev;
struct mlink *mlink;
char *bufp;
mpage->form = FORM_CAT;
prev = &mpage->mlinks;
while (NULL != (mlink = *prev)) {
if (FORM_CAT != mlink->dform) {
mpage->form = FORM_NONE;
goto nextlink;
}
(void)strlcpy(buf, mlink->file, sizeof(buf));
bufp = strstr(buf, "cat");
assert(NULL != bufp);
memcpy(bufp, "man", 3);
if (NULL != (bufp = strrchr(buf, '.')))
*++bufp = '\0';
(void)strlcat(buf, mlink->dsec, sizeof(buf));
if (NULL == ohash_find(&mlinks,
ohash_qlookup(&mlinks, buf)))
goto nextlink;
if (warnings)
say(mlink->file, "Man source exists: %s", buf);
if (use_all)
goto nextlink;
*prev = mlink->next;
mlink_free(mlink);
continue;
nextlink:
prev = &(*prev)->next;
}
}
static void
mlink_check(struct mpage *mpage, struct mlink *mlink)
{
struct str *str;
unsigned int slot;
/*
* Check whether the manual section given in a file
* agrees with the directory where the file is located.
* Some manuals have suffixes like (3p) on their
* section number either inside the file or in the
* directory name, some are linked into more than one
* section, like encrypt(1) = makekey(8).
*/
if (FORM_SRC == mpage->form &&
strcasecmp(mpage->sec, mlink->dsec))
say(mlink->file, "Section \"%s\" manual in %s directory",
mpage->sec, mlink->dsec);
/*
* Manual page directories exist for each kernel
* architecture as returned by machine(1).
* However, many manuals only depend on the
* application architecture as returned by arch(1).
* For example, some (2/ARM) manuals are shared
* across the "armish" and "zaurus" kernel
* architectures.
* A few manuals are even shared across completely
* different architectures, for example fdformat(1)
* on amd64, i386, and sparc64.
*/
if (strcasecmp(mpage->arch, mlink->arch))
say(mlink->file, "Architecture \"%s\" manual in "
"\"%s\" directory", mpage->arch, mlink->arch);
/*
* XXX
* parse_cat() doesn't set NAME_TITLE yet.
*/
if (FORM_CAT == mpage->form)
return;
/*
* Check whether this mlink
* appears as a name in the NAME section.
*/
slot = ohash_qlookup(&names, mlink->name);
str = ohash_find(&names, slot);
assert(NULL != str);
if ( ! (NAME_TITLE & str->mask))
say(mlink->file, "Name missing in NAME section");
}
/*
* Run through the files in the global vector "mpages"
* and add them to the database specified in "basedir".
*
* This handles the parsing scheme itself, using the cues of directory
* and filename to determine whether the file is parsable or not.
*/
static void
mpages_merge(struct dba *dba, struct mparse *mp)
{
struct mpage *mpage, *mpage_dest;
struct mlink *mlink, *mlink_dest;
struct roff_meta *meta;
char *cp;
int fd;
for (mpage = mpage_head; mpage != NULL; mpage = mpage->next) {
mlinks_undupe(mpage);
if ((mlink = mpage->mlinks) == NULL)
continue;
name_mask = NAME_MASK;
mandoc_ohash_init(&names, 4, offsetof(struct str, key));
mandoc_ohash_init(&strings, 6, offsetof(struct str, key));
mparse_reset(mp);
meta = NULL;
if ((fd = mparse_open(mp, mlink->file)) == -1) {
say(mlink->file, "&open");
goto nextpage;
}
/*
* Interpret the file as mdoc(7) or man(7) source
* code, unless it is known to be formatted.
*/
if (mlink->dform != FORM_CAT || mlink->fform != FORM_CAT) {
mparse_readfd(mp, fd, mlink->file);
close(fd);
fd = -1;
meta = mparse_result(mp);
}
if (meta != NULL && meta->sodest != NULL) {
mlink_dest = ohash_find(&mlinks,
ohash_qlookup(&mlinks, meta->sodest));
if (mlink_dest == NULL) {
mandoc_asprintf(&cp, "%s.gz", meta->sodest);
mlink_dest = ohash_find(&mlinks,
ohash_qlookup(&mlinks, cp));
free(cp);
}
if (mlink_dest != NULL) {
/* The .so target exists. */
mpage_dest = mlink_dest->mpage;
while (1) {
mlink->mpage = mpage_dest;
/*
* If the target was already
* processed, add the links
* to the database now.
* Otherwise, this will
* happen when we come
* to the target.
*/
if (mpage_dest->dba != NULL)
dbadd_mlink(mlink);
if (mlink->next == NULL)
break;
mlink = mlink->next;
}
/* Move all links to the target. */
mlink->next = mlink_dest->next;
mlink_dest->next = mpage->mlinks;
mpage->mlinks = NULL;
goto nextpage;
}
meta->macroset = MACROSET_NONE;
}
if (meta != NULL && meta->macroset == MACROSET_MDOC) {
mpage->form = FORM_SRC;
mpage->sec = meta->msec;
mpage->sec = mandoc_strdup(
mpage->sec == NULL ? "" : mpage->sec);
mpage->arch = meta->arch;
mpage->arch = mandoc_strdup(
mpage->arch == NULL ? "" : mpage->arch);
mpage->title = mandoc_strdup(meta->title);
} else if (meta != NULL && meta->macroset == MACROSET_MAN) {
if (*meta->msec != '\0' || *meta->title != '\0') {
mpage->form = FORM_SRC;
mpage->sec = mandoc_strdup(meta->msec);
mpage->arch = mandoc_strdup(mlink->arch);
mpage->title = mandoc_strdup(meta->title);
} else
meta = NULL;
}
assert(mpage->desc == NULL);
if (meta == NULL || meta->sodest != NULL) {
mpage->sec = mandoc_strdup(mlink->dsec);
mpage->arch = mandoc_strdup(mlink->arch);
mpage->title = mandoc_strdup(mlink->name);
if (meta == NULL) {
mpage->form = FORM_CAT;
parse_cat(mpage, fd);
} else
mpage->form = FORM_SRC;
} else if (meta->macroset == MACROSET_MDOC)
parse_mdoc(mpage, meta, meta->first);
else
parse_man(mpage, meta, meta->first);
if (mpage->desc == NULL) {
mpage->desc = mandoc_strdup(mlink->name);
if (warnings)
say(mlink->file, "No one-line description, "
"using filename \"%s\"", mlink->name);
}
for (mlink = mpage->mlinks;
mlink != NULL;
mlink = mlink->next) {
putkey(mpage, mlink->name, NAME_FILE);
if (warnings && !use_all)
mlink_check(mpage, mlink);
}
dbadd(dba, mpage);
nextpage:
ohash_delete(&strings);
ohash_delete(&names);
}
}
static void
parse_cat(struct mpage *mpage, int fd)
{
FILE *stream;
struct mlink *mlink;
char *line, *p, *title, *sec;
size_t linesz, plen, titlesz;
ssize_t len;
int offs;
mlink = mpage->mlinks;
stream = fd == -1 ? fopen(mlink->file, "r") : fdopen(fd, "r");
if (stream == NULL) {
if (fd != -1)
close(fd);
if (warnings)
say(mlink->file, "&fopen");
return;
}
line = NULL;
linesz = 0;
/* Parse the section number from the header line. */
while (getline(&line, &linesz, stream) != -1) {
if (*line == '\n')
continue;
if ((sec = strchr(line, '(')) == NULL)
break;
if ((p = strchr(++sec, ')')) == NULL)
break;
free(mpage->sec);
mpage->sec = mandoc_strndup(sec, p - sec);
if (warnings && *mlink->dsec != '\0' &&
strcasecmp(mpage->sec, mlink->dsec))
say(mlink->file,
"Section \"%s\" manual in %s directory",
mpage->sec, mlink->dsec);
break;
}
/* Skip to first blank line. */
while (line == NULL || *line != '\n')
if (getline(&line, &linesz, stream) == -1)
break;
/*
* Assume the first line that is not indented
* is the first section header. Skip to it.
*/
while (getline(&line, &linesz, stream) != -1)
if (*line != '\n' && *line != ' ')
break;
/*
* Read up until the next section into a buffer.
* Strip the leading and trailing newline from each read line,
* appending a trailing space.
* Ignore empty (whitespace-only) lines.
*/
titlesz = 0;
title = NULL;
while ((len = getline(&line, &linesz, stream)) != -1) {
if (*line != ' ')
break;
offs = 0;
while (isspace((unsigned char)line[offs]))
offs++;
if (line[offs] == '\0')
continue;
title = mandoc_realloc(title, titlesz + len - offs);
memcpy(title + titlesz, line + offs, len - offs);
titlesz += len - offs;
title[titlesz - 1] = ' ';
}
free(line);
/*
* If no page content can be found, or the input line
* is already the next section header, or there is no
* trailing newline, reuse the page title as the page
* description.
*/
if (NULL == title || '\0' == *title) {
if (warnings)
say(mlink->file, "Cannot find NAME section");
fclose(stream);
free(title);
return;
}
title[titlesz - 1] = '\0';
/*
* Skip to the first dash.
* Use the remaining line as the description (no more than 70
* bytes).
*/
if (NULL != (p = strstr(title, "- "))) {
for (p += 2; ' ' == *p || '\b' == *p; p++)
/* Skip to next word. */ ;
} else {
if (warnings)
say(mlink->file, "No dash in title line, "
"reusing \"%s\" as one-line description", title);
p = title;
}
plen = strlen(p);
/* Strip backspace-encoding from line. */
while (NULL != (line = memchr(p, '\b', plen))) {
len = line - p;
if (0 == len) {
memmove(line, line + 1, plen--);
continue;
}
memmove(line - 1, line + 1, plen - len);
plen -= 2;
}
/*
* Cut off excessive one-line descriptions.
* Bad pages are not worth better heuristics.
*/
mpage->desc = mandoc_strndup(p, 150);
fclose(stream);
free(title);
}
/*
* Put a type/word pair into the word database for this particular file.
*/
static void
putkey(const struct mpage *mpage, char *value, uint64_t type)
{
putkeys(mpage, value, strlen(value), type);
}
/*
* Grok all nodes at or below a certain mdoc node into putkey().
*/
static void
putmdockey(const struct mpage *mpage,
const struct roff_node *n, uint64_t m, int taboo)
{
for ( ; NULL != n; n = n->next) {
if (n->flags & taboo)
continue;
if (NULL != n->child)
putmdockey(mpage, n->child, m, taboo);
if (n->type == ROFFT_TEXT)
putkey(mpage, n->string, m);
}
}
static void
parse_man(struct mpage *mpage, const struct roff_meta *meta,
const struct roff_node *n)
{
const struct roff_node *head, *body;
char *start, *title;
char byte;
size_t sz;
if (n == NULL)
return;
/*
* We're only searching for one thing: the first text child in
* the BODY of a NAME section. Since we don't keep track of
* sections in -man, run some hoops to find out whether we're in
* the correct section or not.
*/
if (n->type == ROFFT_BODY && n->tok == MAN_SH) {
body = n;
if ((head = body->parent->head) != NULL &&
(head = head->child) != NULL &&
head->next == NULL &&
head->type == ROFFT_TEXT &&
strcmp(head->string, "NAME") == 0 &&
body->child != NULL) {
/*
* Suck the entire NAME section into memory.
* Yes, we might run away.
* But too many manuals have big, spread-out
* NAME sections over many lines.
*/
title = NULL;
deroff(&title, body);
if (NULL == title)
return;
/*
* Go through a special heuristic dance here.
* Conventionally, one or more manual names are
* comma-specified prior to a whitespace, then a
* dash, then a description. Try to puzzle out
* the name parts here.
*/
start = title;
for ( ;; ) {
sz = strcspn(start, " ,");
if ('\0' == start[sz])
break;
byte = start[sz];
start[sz] = '\0';
/*
* Assume a stray trailing comma in the
* name list if a name begins with a dash.
*/
if ('-' == start[0] ||
('\\' == start[0] && '-' == start[1]))
break;
putkey(mpage, start, NAME_TITLE);
if ( ! (mpage->name_head_done ||
strcasecmp(start, meta->title))) {
putkey(mpage, start, NAME_HEAD);
mpage->name_head_done = 1;
}
if (' ' == byte) {
start += sz + 1;
break;
}
assert(',' == byte);
start += sz + 1;
while (' ' == *start)
start++;
}
if (start == title) {
putkey(mpage, start, NAME_TITLE);
if ( ! (mpage->name_head_done ||
strcasecmp(start, meta->title))) {
putkey(mpage, start, NAME_HEAD);
mpage->name_head_done = 1;
}
free(title);
return;
}
while (isspace((unsigned char)*start))
start++;
if (0 == strncmp(start, "-", 1))
start += 1;
else if (0 == strncmp(start, "\\-\\-", 4))
start += 4;
else if (0 == strncmp(start, "\\-", 2))
start += 2;
else if (0 == strncmp(start, "\\(en", 4))
start += 4;
else if (0 == strncmp(start, "\\(em", 4))
start += 4;
while (' ' == *start)
start++;
/*
* Cut off excessive one-line descriptions.
* Bad pages are not worth better heuristics.
*/
mpage->desc = mandoc_strndup(start, 150);
free(title);
return;
}
}
for (n = n->child; n; n = n->next) {
if (NULL != mpage->desc)
break;
parse_man(mpage, meta, n);
}
}
static void
parse_mdoc(struct mpage *mpage, const struct roff_meta *meta,
const struct roff_node *n)
{
const struct mdoc_handler *handler;
for (n = n->child; n != NULL; n = n->next) {
if (n->tok == TOKEN_NONE || n->tok < ROFF_MAX)
continue;
assert(n->tok >= MDOC_Dd && n->tok < MDOC_MAX);
handler = mdoc_handlers + (n->tok - MDOC_Dd);
if (n->flags & handler->taboo)
continue;
switch (n->type) {
case ROFFT_ELEM:
case ROFFT_BLOCK:
case ROFFT_HEAD:
case ROFFT_BODY:
case ROFFT_TAIL:
if (handler->fp != NULL &&
(*handler->fp)(mpage, meta, n) == 0)
break;
if (handler->mask)
putmdockey(mpage, n->child,
handler->mask, handler->taboo);
break;
default:
continue;
}
if (NULL != n->child)
parse_mdoc(mpage, meta, n);
}
}
static int
parse_mdoc_Fa(struct mpage *mpage, const struct roff_meta *meta,
const struct roff_node *n)
{
uint64_t mask;
mask = TYPE_Fa;
if (n->sec == SEC_SYNOPSIS)
mask |= TYPE_Vt;
putmdockey(mpage, n->child, mask, 0);
return 0;
}
static int
parse_mdoc_Fd(struct mpage *mpage, const struct roff_meta *meta,
const struct roff_node *n)
{
char *start, *end;
size_t sz;
if (SEC_SYNOPSIS != n->sec ||
NULL == (n = n->child) ||
n->type != ROFFT_TEXT)
return 0;
/*
* Only consider those `Fd' macro fields that begin with an
* "inclusion" token (versus, e.g., #define).
*/
if (strcmp("#include", n->string))
return 0;
if ((n = n->next) == NULL || n->type != ROFFT_TEXT)
return 0;
/*
* Strip away the enclosing angle brackets and make sure we're
* not zero-length.
*/
start = n->string;
if ('<' == *start || '"' == *start)
start++;
if (0 == (sz = strlen(start)))
return 0;
end = &start[(int)sz - 1];
if ('>' == *end || '"' == *end)
end--;
if (end > start)
putkeys(mpage, start, end - start + 1, TYPE_In);
return 0;
}
static void
parse_mdoc_fname(struct mpage *mpage, const struct roff_node *n)
{
char *cp;
size_t sz;
if (n->type != ROFFT_TEXT)
return;
/* Skip function pointer punctuation. */
cp = n->string;
while (*cp == '(' || *cp == '*')
cp++;
sz = strcspn(cp, "()");
putkeys(mpage, cp, sz, TYPE_Fn);
if (n->sec == SEC_SYNOPSIS)
putkeys(mpage, cp, sz, NAME_SYN);
}
static int
parse_mdoc_Fn(struct mpage *mpage, const struct roff_meta *meta,
const struct roff_node *n)
{
uint64_t mask;
if (n->child == NULL)
return 0;
parse_mdoc_fname(mpage, n->child);
n = n->child->next;
if (n != NULL && n->type == ROFFT_TEXT) {
mask = TYPE_Fa;
if (n->sec == SEC_SYNOPSIS)
mask |= TYPE_Vt;
putmdockey(mpage, n, mask, 0);
}
return 0;
}
static int
parse_mdoc_Fo(struct mpage *mpage, const struct roff_meta *meta,
const struct roff_node *n)
{
if (n->type != ROFFT_HEAD)
return 1;
if (n->child != NULL)
parse_mdoc_fname(mpage, n->child);
return 0;
}
static int
parse_mdoc_Va(struct mpage *mpage, const struct roff_meta *meta,
const struct roff_node *n)
{
char *cp;
if (n->type != ROFFT_ELEM && n->type != ROFFT_BODY)
return 0;
if (n->child != NULL &&
n->child->next == NULL &&
n->child->type == ROFFT_TEXT)
return 1;
cp = NULL;
deroff(&cp, n);
if (cp != NULL) {
putkey(mpage, cp, TYPE_Vt | (n->tok == MDOC_Va ||
n->type == ROFFT_BODY ? TYPE_Va : 0));
free(cp);
}
return 0;
}
static int
parse_mdoc_Xr(struct mpage *mpage, const struct roff_meta *meta,
const struct roff_node *n)
{
char *cp;
if (NULL == (n = n->child))
return 0;
if (NULL == n->next) {
putkey(mpage, n->string, TYPE_Xr);
return 0;
}
mandoc_asprintf(&cp, "%s(%s)", n->string, n->next->string);
putkey(mpage, cp, TYPE_Xr);
free(cp);
return 0;
}
static int
parse_mdoc_Nd(struct mpage *mpage, const struct roff_meta *meta,
const struct roff_node *n)
{
if (n->type == ROFFT_BODY)
deroff(&mpage->desc, n);
return 0;
}
static int
parse_mdoc_Nm(struct mpage *mpage, const struct roff_meta *meta,
const struct roff_node *n)
{
if (SEC_NAME == n->sec)
putmdockey(mpage, n->child, NAME_TITLE, 0);
else if (n->sec == SEC_SYNOPSIS && n->type == ROFFT_HEAD) {
if (n->child == NULL)
putkey(mpage, meta->name, NAME_SYN);
else
putmdockey(mpage, n->child, NAME_SYN, 0);
}
if ( ! (mpage->name_head_done ||
n->child == NULL || n->child->string == NULL ||
strcasecmp(n->child->string, meta->title))) {
putkey(mpage, n->child->string, NAME_HEAD);
mpage->name_head_done = 1;
}
return 0;
}
static int
parse_mdoc_Sh(struct mpage *mpage, const struct roff_meta *meta,
const struct roff_node *n)
{
return n->sec == SEC_CUSTOM && n->type == ROFFT_HEAD;
}
static int
parse_mdoc_head(struct mpage *mpage, const struct roff_meta *meta,
const struct roff_node *n)
{
return n->type == ROFFT_HEAD;
}
/*
* Add a string to the hash table for the current manual.
* Each string has a bitmask telling which macros it belongs to.
* When we finish the manual, we'll dump the table.
*/
static void
putkeys(const struct mpage *mpage, char *cp, size_t sz, uint64_t v)
{
struct ohash *htab;
struct str *s;
const char *end;
unsigned int slot;
int i, mustfree;
if (0 == sz)
return;
mustfree = render_string(&cp, &sz);
if (TYPE_Nm & v) {
htab = &names;
v &= name_mask;
if (v & NAME_FIRST)
name_mask &= ~NAME_FIRST;
if (debug > 1)
say(mpage->mlinks->file,
"Adding name %*s, bits=0x%llx", (int)sz, cp,
(unsigned long long)v);
} else {
htab = &strings;
if (debug > 1)
for (i = 0; i < KEY_MAX; i++)
if ((uint64_t)1 << i & v)
say(mpage->mlinks->file,
"Adding key %s=%*s",
mansearch_keynames[i], (int)sz, cp);
}
end = cp + sz;
slot = ohash_qlookupi(htab, cp, &end);
s = ohash_find(htab, slot);
if (NULL != s && mpage == s->mpage) {
s->mask |= v;
return;
} else if (NULL == s) {
s = mandoc_calloc(1, sizeof(struct str) + sz + 1);
memcpy(s->key, cp, sz);
ohash_insert(htab, slot, s);
}
s->mpage = mpage;
s->mask = v;
if (mustfree)
free(cp);
}
/*
* Take a Unicode codepoint and produce its UTF-8 encoding.
* This isn't the best way to do this, but it works.
* The magic numbers are from the UTF-8 packaging.
* They're not as scary as they seem: read the UTF-8 spec for details.
*/
static size_t
utf8(unsigned int cp, char out[7])
{
size_t rc;
rc = 0;
if (cp <= 0x0000007F) {
rc = 1;
out[0] = (char)cp;
} else if (cp <= 0x000007FF) {
rc = 2;
out[0] = (cp >> 6 & 31) | 192;
out[1] = (cp & 63) | 128;
} else if (cp <= 0x0000FFFF) {
rc = 3;
out[0] = (cp >> 12 & 15) | 224;
out[1] = (cp >> 6 & 63) | 128;
out[2] = (cp & 63) | 128;
} else if (cp <= 0x001FFFFF) {
rc = 4;
out[0] = (cp >> 18 & 7) | 240;
out[1] = (cp >> 12 & 63) | 128;
out[2] = (cp >> 6 & 63) | 128;
out[3] = (cp & 63) | 128;
} else if (cp <= 0x03FFFFFF) {
rc = 5;
out[0] = (cp >> 24 & 3) | 248;
out[1] = (cp >> 18 & 63) | 128;
out[2] = (cp >> 12 & 63) | 128;
out[3] = (cp >> 6 & 63) | 128;
out[4] = (cp & 63) | 128;
} else if (cp <= 0x7FFFFFFF) {
rc = 6;
out[0] = (cp >> 30 & 1) | 252;
out[1] = (cp >> 24 & 63) | 128;
out[2] = (cp >> 18 & 63) | 128;
out[3] = (cp >> 12 & 63) | 128;
out[4] = (cp >> 6 & 63) | 128;
out[5] = (cp & 63) | 128;
} else
return 0;
out[rc] = '\0';
return rc;
}
/*
* If the string contains escape sequences,
* replace it with an allocated rendering and return 1,
* such that the caller can free it after use.
* Otherwise, do nothing and return 0.
*/
static int
render_string(char **public, size_t *psz)
{
const char *src, *scp, *addcp, *seq;
char *dst;
size_t ssz, dsz, addsz;
char utfbuf[7], res[6];
int seqlen, unicode;
res[0] = '\\';
res[1] = '\t';
res[2] = ASCII_NBRSP;
res[3] = ASCII_HYPH;
res[4] = ASCII_BREAK;
res[5] = '\0';
src = scp = *public;
ssz = *psz;
dst = NULL;
dsz = 0;
while (scp < src + *psz) {
/* Leave normal characters unchanged. */
if (strchr(res, *scp) == NULL) {
if (dst != NULL)
dst[dsz++] = *scp;
scp++;
continue;
}
/*
* Found something that requires replacing,
* make sure we have a destination buffer.
*/
if (dst == NULL) {
dst = mandoc_malloc(ssz + 1);
dsz = scp - src;
memcpy(dst, src, dsz);
}
/* Handle single-char special characters. */
switch (*scp) {
case '\\':
break;
case '\t':
case ASCII_NBRSP:
dst[dsz++] = ' ';
scp++;
continue;
case ASCII_HYPH:
dst[dsz++] = '-';
/* FALLTHROUGH */
case ASCII_BREAK:
scp++;
continue;
default:
abort();
}
/*
* Found an escape sequence.
* Read past the slash, then parse it.
* Ignore everything except characters.
*/
scp++;
if (mandoc_escape(&scp, &seq, &seqlen) != ESCAPE_SPECIAL)
continue;
/*
* Render the special character
* as either UTF-8 or ASCII.
*/
if (write_utf8) {
unicode = mchars_spec2cp(seq, seqlen);
if (unicode <= 0)
continue;
addsz = utf8(unicode, utfbuf);
if (addsz == 0)
continue;
addcp = utfbuf;
} else {
addcp = mchars_spec2str(seq, seqlen, &addsz);
if (addcp == NULL)
continue;
if (*addcp == ASCII_NBRSP) {
addcp = " ";
addsz = 1;
}
}
/* Copy the rendered glyph into the stream. */
ssz += addsz;
dst = mandoc_realloc(dst, ssz + 1);
memcpy(dst + dsz, addcp, addsz);
dsz += addsz;
}
if (dst != NULL) {
*public = dst;
*psz = dsz;
}
/* Trim trailing whitespace and NUL-terminate. */
while (*psz > 0 && (*public)[*psz - 1] == ' ')
--*psz;
if (dst != NULL) {
(*public)[*psz] = '\0';
return 1;
} else
return 0;
}
static void
dbadd_mlink(const struct mlink *mlink)
{
dba_page_alias(mlink->mpage->dba, mlink->name, NAME_FILE);
dba_page_add(mlink->mpage->dba, DBP_SECT, mlink->dsec);
dba_page_add(mlink->mpage->dba, DBP_SECT, mlink->fsec);
dba_page_add(mlink->mpage->dba, DBP_ARCH, mlink->arch);
dba_page_add(mlink->mpage->dba, DBP_FILE, mlink->file);
}
/*
* Flush the current page's terms (and their bits) into the database.
* Also, handle escape sequences at the last possible moment.
*/
static void
dbadd(struct dba *dba, struct mpage *mpage)
{
struct mlink *mlink;
struct str *key;
char *cp;
uint64_t mask;
size_t i;
unsigned int slot;
int mustfree;
mlink = mpage->mlinks;
if (nodb) {
for (key = ohash_first(&names, &slot); NULL != key;
key = ohash_next(&names, &slot))
free(key);
for (key = ohash_first(&strings, &slot); NULL != key;
key = ohash_next(&strings, &slot))
free(key);
if (0 == debug)
return;
while (NULL != mlink) {
fputs(mlink->name, stdout);
if (NULL == mlink->next ||
strcmp(mlink->dsec, mlink->next->dsec) ||
strcmp(mlink->fsec, mlink->next->fsec) ||
strcmp(mlink->arch, mlink->next->arch)) {
putchar('(');
if ('\0' == *mlink->dsec)
fputs(mlink->fsec, stdout);
else
fputs(mlink->dsec, stdout);
if ('\0' != *mlink->arch)
printf("/%s", mlink->arch);
putchar(')');
}
mlink = mlink->next;
if (NULL != mlink)
fputs(", ", stdout);
}
printf(" - %s\n", mpage->desc);
return;
}
if (debug)
say(mlink->file, "Adding to database");
cp = mpage->desc;
i = strlen(cp);
mustfree = render_string(&cp, &i);
mpage->dba = dba_page_new(dba->pages,
*mpage->arch == '\0' ? mlink->arch : mpage->arch,
cp, mlink->file, mpage->form);
if (mustfree)
free(cp);
dba_page_add(mpage->dba, DBP_SECT, mpage->sec);
while (mlink != NULL) {
dbadd_mlink(mlink);
mlink = mlink->next;
}
for (key = ohash_first(&names, &slot); NULL != key;
key = ohash_next(&names, &slot)) {
assert(key->mpage == mpage);
dba_page_alias(mpage->dba, key->key, key->mask);
free(key);
}
for (key = ohash_first(&strings, &slot); NULL != key;
key = ohash_next(&strings, &slot)) {
assert(key->mpage == mpage);
i = 0;
for (mask = TYPE_Xr; mask <= TYPE_Lb; mask *= 2) {
if (key->mask & mask)
dba_macro_add(dba->macros, i,
key->key, mpage->dba);
i++;
}
free(key);
}
}
static void
dbprune(struct dba *dba)
{
struct dba_array *page, *files;
char *file;
dba_array_FOREACH(dba->pages, page) {
files = dba_array_get(page, DBP_FILE);
dba_array_FOREACH(files, file) {
if (*file < ' ')
file++;
if (ohash_find(&mlinks, ohash_qlookup(&mlinks,
file)) != NULL) {
if (debug)
say(file, "Deleting from database");
dba_array_del(dba->pages);
break;
}
}
}
}
/*
* Write the database from memory to disk.
*/
static void
dbwrite(struct dba *dba)
{
struct stat sb1, sb2;
char tfn[33], *cp1, *cp2;
off_t i;
int fd1, fd2;
/*
* Do not write empty databases, and delete existing ones
* when makewhatis -u causes them to become empty.
*/
dba_array_start(dba->pages);
if (dba_array_next(dba->pages) == NULL) {
if (unlink(MANDOC_DB) == -1 && errno != ENOENT)
say(MANDOC_DB, "&unlink");
return;
}
/*
* Build the database in a temporary file,
* then atomically move it into place.
*/
if (dba_write(MANDOC_DB "~", dba) != -1) {
if (rename(MANDOC_DB "~", MANDOC_DB) == -1) {
exitcode = (int)MANDOCLEVEL_SYSERR;
say(MANDOC_DB, "&rename");
unlink(MANDOC_DB "~");
}
return;
}
/*
* We lack write permission and cannot replace the database
* file, but let's at least check whether the data changed.
*/
(void)strlcpy(tfn, "/tmp/mandocdb.XXXXXXXX", sizeof(tfn));
if (mkdtemp(tfn) == NULL) {
exitcode = (int)MANDOCLEVEL_SYSERR;
say("", "&%s", tfn);
return;
}
cp1 = cp2 = MAP_FAILED;
fd1 = fd2 = -1;
(void)strlcat(tfn, "/" MANDOC_DB, sizeof(tfn));
if (dba_write(tfn, dba) == -1) {
say(tfn, "&dba_write");
goto err;
}
if ((fd1 = open(MANDOC_DB, O_RDONLY, 0)) == -1) {
say(MANDOC_DB, "&open");
goto err;
}
if ((fd2 = open(tfn, O_RDONLY, 0)) == -1) {
say(tfn, "&open");
goto err;
}
if (fstat(fd1, &sb1) == -1) {
say(MANDOC_DB, "&fstat");
goto err;
}
if (fstat(fd2, &sb2) == -1) {
say(tfn, "&fstat");
goto err;
}
if (sb1.st_size != sb2.st_size)
goto err;
if ((cp1 = mmap(NULL, sb1.st_size, PROT_READ, MAP_PRIVATE,
fd1, 0)) == MAP_FAILED) {
say(MANDOC_DB, "&mmap");
goto err;
}
if ((cp2 = mmap(NULL, sb2.st_size, PROT_READ, MAP_PRIVATE,
fd2, 0)) == MAP_FAILED) {
say(tfn, "&mmap");
goto err;
}
for (i = 0; i < sb1.st_size; i++)
if (cp1[i] != cp2[i])
goto err;
goto out;
err:
exitcode = (int)MANDOCLEVEL_SYSERR;
say(MANDOC_DB, "Data changed, but cannot replace database");
out:
if (cp1 != MAP_FAILED)
munmap(cp1, sb1.st_size);
if (cp2 != MAP_FAILED)
munmap(cp2, sb2.st_size);
if (fd1 != -1)
close(fd1);
if (fd2 != -1)
close(fd2);
unlink(tfn);
*strrchr(tfn, '/') = '\0';
rmdir(tfn);
}
static int
set_basedir(const char *targetdir, int report_baddir)
{
static char startdir[PATH_MAX];
static int getcwd_status; /* 1 = ok, 2 = failure */
static int chdir_status; /* 1 = changed directory */
/*
* Remember the original working directory, if possible.
* This will be needed if the second or a later directory
* on the command line is given as a relative path.
* Do not error out if the current directory is not
* searchable: Maybe it won't be needed after all.
*/
if (getcwd_status == 0) {
if (getcwd(startdir, sizeof(startdir)) == NULL) {
getcwd_status = 2;
(void)strlcpy(startdir, strerror(errno),
sizeof(startdir));
} else
getcwd_status = 1;
}
/*
* We are leaving the old base directory.
* Do not use it any longer, not even for messages.
*/
*basedir = '\0';
basedir_len = 0;
/*
* If and only if the directory was changed earlier and
* the next directory to process is given as a relative path,
* first go back, or bail out if that is impossible.
*/
if (chdir_status && *targetdir != '/') {
if (getcwd_status == 2) {
exitcode = (int)MANDOCLEVEL_SYSERR;
say("", "getcwd: %s", startdir);
return 0;
}
if (chdir(startdir) == -1) {
exitcode = (int)MANDOCLEVEL_SYSERR;
say("", "&chdir %s", startdir);
return 0;
}
}
/*
* Always resolve basedir to the canonicalized absolute
* pathname and append a trailing slash, such that
* we can reliably check whether files are inside.
*/
if (realpath(targetdir, basedir) == NULL) {
if (report_baddir || errno != ENOENT) {
exitcode = (int)MANDOCLEVEL_BADARG;
say("", "&%s: realpath", targetdir);
}
*basedir = '\0';
return 0;
} else if (chdir(basedir) == -1) {
if (report_baddir || errno != ENOENT) {
exitcode = (int)MANDOCLEVEL_BADARG;
say("", "&chdir");
}
*basedir = '\0';
return 0;
}
chdir_status = 1;
basedir_len = strlen(basedir);
if (basedir[basedir_len - 1] != '/') {
if (basedir_len >= PATH_MAX - 1) {
exitcode = (int)MANDOCLEVEL_SYSERR;
say("", "Filename too long");
*basedir = '\0';
basedir_len = 0;
return 0;
}
basedir[basedir_len++] = '/';
basedir[basedir_len] = '\0';
}
return 1;
}
#ifdef READ_ALLOWED_PATH
static int
read_allowed(const char *candidate)
{
const char *cp;
size_t len;
for (cp = READ_ALLOWED_PATH;; cp += len) {
while (*cp == ':')
cp++;
if (*cp == '\0')
return 0;
len = strcspn(cp, ":");
if (strncmp(candidate, cp, len) == 0)
return 1;
}
}
#endif
static void
say(const char *file, const char *format, ...)
{
va_list ap;
int use_errno;
if (*basedir != '\0')
fprintf(stderr, "%s", basedir);
if (*basedir != '\0' && *file != '\0')
fputc('/', stderr);
if (*file != '\0')
fprintf(stderr, "%s", file);
use_errno = 1;
if (format != NULL) {
switch (*format) {
case '&':
format++;
break;
case '\0':
format = NULL;
break;
default:
use_errno = 0;
break;
}
}
if (format != NULL) {
if (*basedir != '\0' || *file != '\0')
fputs(": ", stderr);
va_start(ap, format);
vfprintf(stderr, format, ap);
va_end(ap);
}
if (use_errno) {
if (*basedir != '\0' || *file != '\0' || format != NULL)
fputs(": ", stderr);
perror(NULL);
} else
fputc('\n', stderr);
}
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