Support nesting of elements with next-line scope.

[mandoc.git] / main.c

diff --git a/main.c b/main.c
index 396c6daf975de25a47eae2381e23c55d219cc3b4..cad227507eaf34302dd3c86e7646d25b69c96097 100644 (file)
--- a/main.c
+++ b/main.c
@@ -1,452 +1,1253 @@
-/* $Id: main.c,v 1.1 2009/03/19 16:17:27 kristaps Exp $ */
+/*     $Id: main.c,v 1.308 2018/08/23 19:33:27 schwarze Exp $ */

 /*
 /*

- * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@openbsd.org>
+ * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2010-2012, 2014-2018 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2010 Joerg Sonnenberger <joerg@netbsd.org>

  *
  * Permission to use, copy, modify, and distribute this software for any
  *
  * 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.
+ * 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.
+ * 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.

  */
  */

-#include <sys/stat.h>
+#include "config.h"
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/param.h> /* MACHINE */
+#include <sys/termios.h>
+#include <sys/wait.h>

 
 #include <assert.h>
 
 #include <assert.h>

+#include <ctype.h>
+#if HAVE_ERR

 #include <err.h>
 #include <err.h>

+#endif
+#include <errno.h>

 #include <fcntl.h>
 #include <fcntl.h>

+#include <glob.h>
+#if HAVE_SANDBOX_INIT
+#include <sandbox.h>
+#endif
+#include <signal.h>

 #include <stdio.h>
 #include <stdio.h>

+#include <stdint.h>

 #include <stdlib.h>
 #include <string.h>
 #include <stdlib.h>
 #include <string.h>

+#include <time.h>

 #include <unistd.h>
 
 #include <unistd.h>
 

+#include "mandoc_aux.h"
+#include "mandoc.h"
+#include "mandoc_xr.h"
+#include "roff.h"

 #include "mdoc.h"
 #include "mdoc.h"

-
-#define        WARN_WALL         0x03          /* All-warnings mask. */
-#define        WARN_WCOMPAT     (1 << 0)       /* Compatibility warnings. */
-#define        WARN_WSYNTAX     (1 << 1)       /* Syntax warnings. */
-#define        WARN_WERR        (1 << 2)       /* Warnings->errors. */
-
-enum outt {
-       OUTT_ASCII,
-       OUTT_LATIN1,
-       OUTT_UTF8,
-       OUTT_TREE,
-       OUTT_LINT
+#include "man.h"
+#include "tag.h"
+#include "main.h"
+#include "manconf.h"
+#include "mansearch.h"
+
+enum   outmode {
+       OUTMODE_DEF = 0,
+       OUTMODE_FLN,
+       OUTMODE_LST,
+       OUTMODE_ALL,
+       OUTMODE_ONE

 };
 
 };
 

-typedef        int             (*out_run)(void *, const struct mdoc *);
-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_MARKDOWN,  /* -Tmarkdown */
+       OUTT_LINT,      /* -Tlint */
+       OUTT_PS,        /* -Tps */
+       OUTT_PDF        /* -Tpdf */
+};

 
 

-extern char             *__progname;
+struct curparse {
+       struct mparse    *mp;
+       struct manoutput *outopts;      /* output options */
+       void             *outdata;      /* data for output */
+       char             *os_s;         /* operating system for display */
+       int               wstop;        /* stop after a file with a warning */
+       enum mandocerr    mmin;         /* ignore messages below this */
+       enum mandoc_os    os_e;         /* check base system conventions */
+       enum outt         outtype;      /* which output to use */
+};

 
 

-extern void             *ascii_alloc(void);
-extern void             *latin1_alloc(void);
-extern void             *utf8_alloc(void);
-extern int               terminal_run(void *, const struct mdoc *);
-extern int               tree_run(void *, const struct mdoc *);
-extern void              terminal_free(void *);

 
 

-__dead static void       version(void);
-__dead static void       usage(void);
-static int               foptions(int *, char *);
-static int               toptions(enum outt *, char *);
-static int               woptions(int *, char *);
-static int               merr(void *, int, int, const char *);
-static int               mwarn(void *, int, int, 
-                               enum mdoc_warn, const char *);
-static int               file(char **, size_t *, char **, size_t *, 
-                               const char *, struct mdoc *);
-static int               fdesc(char **, size_t *, char **, size_t *, 
-                               const char *, int, struct mdoc *);
+int                      mandocdb(int, char *[]);
+
+static void              check_xr(const char *);
+static int               fs_lookup(const struct manpaths *,
+                               size_t ipath, const char *,
+                               const char *, const char *,
+                               struct manpage **, size_t *);
+static int               fs_search(const struct mansearch *,
+                               const struct manpaths *, int, char**,
+                               struct manpage **, size_t *);
+static int               koptions(int *, char *);
+static void              moptions(int *, char *);
+static void              mmsg(enum mandocerr, enum mandoclevel,
+                               const char *, int, int, const char *);
+static void              outdata_alloc(struct curparse *);
+static void              parse(struct curparse *, int, const char *);
+static void              passthrough(const char *, int, int);
+static pid_t             spawn_pager(struct tag_files *);
+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 enum mandoclevel  rc;
+static FILE             *mmsg_stream;

 
 
 int
 main(int argc, char *argv[])
 {
 
 
 int
 main(int argc, char *argv[])
 {

-       int              c, rc, fflags, wflags;
-       struct mdoc_cb   cb;
-       struct mdoc     *mdoc;
-       char            *buf, *line;
-       size_t           bufsz, linesz;
-       void            *outdata;
-       enum outt        outtype;
-       out_run          outrun;
-       out_free         outfree;
-
-       fflags = wflags = 0;
-       outtype = OUTT_ASCII;
-
-       /* LINTED */
-       while (-1 != (c = getopt(argc, argv, "f:VW:T:")))
+       struct manconf   conf;
+       struct mansearch search;
+       struct curparse  curp;
+       struct winsize   ws;
+       struct tag_files *tag_files;
+       struct manpage  *res, *resp;
+       const char      *progname, *sec, *thisarg;
+       char            *conf_file, *defpaths, *auxpaths;
+       char            *oarg;
+       unsigned char   *uc;
+       size_t           i, sz;
+       int              prio, best_prio;
+       enum outmode     outmode;
+       int              fd, startdir;
+       int              show_usage;
+       int              options;
+       int              use_pager;
+       int              status, signum;
+       int              c;
+       pid_t            pager_pid, tc_pgid, man_pgid, pid;
+
+#if HAVE_PROGNAME
+       progname = getprogname();
+#else
+       if (argc < 1)
+               progname = mandoc_strdup("mandoc");
+       else if ((progname = strrchr(argv[0], '/')) == NULL)
+               progname = argv[0];
+       else
+               ++progname;
+       setprogname(progname);
+#endif
+
+       if (strncmp(progname, "mandocdb", 8) == 0 ||
+           strcmp(progname, BINM_MAKEWHATIS) == 0)
+               return mandocdb(argc, argv);
+
+#if HAVE_PLEDGE
+       if (pledge("stdio rpath tmppath tty proc exec", NULL) == -1)
+               err((int)MANDOCLEVEL_SYSERR, "pledge");
+#endif
+
+#if HAVE_SANDBOX_INIT
+       if (sandbox_init(kSBXProfileNoInternet, SANDBOX_NAMED, NULL) == -1)
+               errx((int)MANDOCLEVEL_SYSERR, "sandbox_init");
+#endif
+
+       /* Search options. */
+
+       memset(&conf, 0, sizeof(conf));
+       conf_file = defpaths = NULL;
+       auxpaths = NULL;
+
+       memset(&search, 0, sizeof(struct mansearch));
+       search.outkey = "Nd";
+       oarg = NULL;
+
+       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.mmin = MANDOCERR_MAX;
+       curp.outopts = &conf.output;
+       options = MPARSE_SO | MPARSE_UTF8 | MPARSE_LATIN1;
+       mmsg_stream = stderr;
+
+       use_pager = 1;
+       tag_files = NULL;
+       show_usage = 0;
+       outmode = OUTMODE_DEF;
+
+       while ((c = getopt(argc, argv,
+           "aC:cfhI:iK:klM:m:O:S:s:T:VW:w")) != -1) {
+               if (c == 'i' && search.argmode == ARG_EXPR) {
+                       optind--;
+                       break;
+               }

                switch (c) {
                switch (c) {

-               case ('f'):
-                       if ( ! foptions(&fflags, optarg))
-                               return(0);
+               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':
+                       conf.output.synopsisonly = 1;
+                       use_pager = 0;
+                       outmode = OUTMODE_ALL;
+                       break;
+               case 'I':
+                       if (strncmp(optarg, "os=", 3)) {
+                               warnx("-I %s: Bad argument", optarg);
+                               return (int)MANDOCLEVEL_BADARG;
+                       }
+                       if (curp.os_s != NULL) {
+                               warnx("-I %s: Duplicate argument", optarg);
+                               return (int)MANDOCLEVEL_BADARG;
+                       }
+                       curp.os_s = mandoc_strdup(optarg + 3);
+                       break;
+               case 'K':
+                       if ( ! koptions(&options, optarg))
+                               return (int)MANDOCLEVEL_BADARG;
+                       break;
+               case 'k':
+                       search.argmode = ARG_EXPR;

                        break;
                        break;

-               case ('T'):
-                       if ( ! toptions(&outtype, optarg))
-                               return(0);
+               case 'l':
+                       search.argmode = ARG_FILE;
+                       outmode = OUTMODE_ALL;

                        break;
                        break;

-               case ('W'):
-                       if ( ! woptions(&wflags, optarg))
-                               return(0);
+               case 'M':
+                       defpaths = optarg;
+                       break;
+               case 'm':
+                       auxpaths = optarg;
+                       break;
+               case 'O':
+                       oarg = optarg;
+                       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;
                        break;

-               case ('V'):
-                       version();
-                       /* NOTREACHED */

                default:
                default:

-                       usage();
-                       /* NOTREACHED */
+                       show_usage = 1;
+                       break;

                }
                }

+       }

 
 

-       argc -= optind;
-       argv += optind;
+       if (show_usage)
+               usage(search.argmode);

 
 

-       /*
-        * Allocate the appropriate front-end.  Note that utf8, ascii
-        * and latin1 all resolve to the terminal front-end with
-        * different encodings (see terminal.c).  Not all frontends have
-        * cleanup or alloc routines.
-        */
+       /* Postprocess options. */

 
 

-       switch (outtype) {
-       case (OUTT_LATIN1):
-               outdata = latin1_alloc();
-               outrun = terminal_run;
-               outfree = terminal_free;
-               break;
-       case (OUTT_UTF8):
-               outdata = utf8_alloc();
-               outrun = terminal_run;
-               outfree = terminal_free;
-               break;
-       case (OUTT_TREE):
-               outdata = NULL;
-               outrun = tree_run;
-               outfree = NULL;
-               break;
-       case (OUTT_LINT):
-               outdata = NULL;
-               outrun = NULL;
-               outfree = NULL;
-               break;
-       default:
-               outdata = ascii_alloc();
-               outrun = terminal_run;
-               outfree = terminal_free;
-               break;
+       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;
+               }

        }
 
        }
 

-       /*
-        * All callbacks route into here, where we print them onto the
-        * screen.  XXX - for now, no path for debugging messages.
-        */
-
-       cb.mdoc_msg = NULL;
-       cb.mdoc_err = merr;
-       cb.mdoc_warn = mwarn;
+       if (oarg != NULL) {
+               if (outmode == OUTMODE_LST)
+                       search.outkey = oarg;
+               else {
+                       while (oarg != NULL) {
+                               thisarg = oarg;
+                               if (manconf_output(&conf.output,
+                                   strsep(&oarg, ","), 0) == 0)
+                                       continue;
+                               warnx("-O %s: Bad argument", thisarg);
+                               return (int)MANDOCLEVEL_BADARG;
+                       }
+               }
+       }

 
 

-       buf = line = NULL;
-       bufsz = linesz = 0;
+       if (outmode == OUTMODE_FLN ||
+           outmode == OUTMODE_LST ||
+           !isatty(STDOUT_FILENO))
+               use_pager = 0;
+
+       if (use_pager &&
+           (conf.output.width == 0 || conf.output.indent == 0) &&
+           ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) != -1 &&
+           ws.ws_col > 1) {
+               if (conf.output.width == 0 && ws.ws_col < 79)
+                       conf.output.width = ws.ws_col - 1;
+               if (conf.output.indent == 0 && ws.ws_col < 66)
+                       conf.output.indent = 3;
+       }

 
 

-       mdoc = mdoc_alloc(&wflags, fflags, &cb);
+#if HAVE_PLEDGE
+       if (!use_pager)
+               if (pledge("stdio rpath", NULL) == -1)
+                       err((int)MANDOCLEVEL_SYSERR, "pledge");
+#endif

 
 

-       while (*argv) {
-               if ( ! file(&line, &linesz, &buf, &bufsz, *argv, mdoc))
-                       break;
-               if (outrun && ! (*outrun)(outdata, mdoc))
-                       break;
+       /* Parse arguments. */

 
 

-               /* Reset the parser for another file. */
-               mdoc_reset(mdoc);
-               argv++;
+       if (argc > 0) {
+               argc -= optind;
+               argv += optind;

        }
        }

+       resp = NULL;

 
 

-       rc = NULL == *argv;
+       /*
+        * Quirks for help(1)
+        * and for a man(1) section argument without -s.
+        */

 
 

-       if (buf)
-               free(buf);
-       if (line)
-               free(line);
-       if (outfree)
-               (*outfree)(outdata);
+       if (search.argmode == ARG_NAME) {
+               if (*progname == 'h') {
+                       if (argc == 0) {
+                               argv = help_argv;
+                               argc = 1;
+                       }
+               } else if (argc > 1 &&
+                   ((uc = (unsigned char *)argv[0]) != NULL) &&
+                   ((isdigit(uc[0]) && (uc[1] == '\0' ||
+                     (isalpha(uc[1]) && uc[2] == '\0'))) ||
+                    (uc[0] == 'n' && uc[1] == '\0'))) {
+                       search.sec = (char *)uc;
+                       argv++;
+                       argc--;
+               }
+               if (search.arch == NULL)
+                       search.arch = getenv("MACHINE");
+#ifdef MACHINE
+               if (search.arch == NULL)
+                       search.arch = MACHINE;
+#endif
+       }

 
 

-       mdoc_free(mdoc);
+       rc = MANDOCLEVEL_OK;

 
 

-       return(rc ? EXIT_SUCCESS : EXIT_FAILURE);
-}
+       /* man(1), whatis(1), apropos(1) */

 
 

+       if (search.argmode != ARG_FILE) {
+               if (search.argmode == ARG_NAME &&
+                   outmode == OUTMODE_ONE)
+                       search.firstmatch = 1;

 
 

-__dead static void
-version(void)
-{
+               /* Access the mandoc database. */

 
 

-       (void)printf("%s %s\n", __progname, VERSION);
-       exit(0);
-       /* NOTREACHED */
-}
+               manconf_parse(&conf, conf_file, defpaths, auxpaths);
+               if ( ! mansearch(&search, &conf.manpath,
+                   argc, argv, &res, &sz))
+                       usage(search.argmode);

 
 

+               if (sz == 0 && search.argmode == ARG_NAME)
+                       fs_search(&search, &conf.manpath,
+                           argc, argv, &res, &sz);

 
 

-__dead static void
-usage(void)
-{
+               if (search.argmode == ARG_NAME) {
+                       for (c = 0; c < argc; c++) {
+                               if (strchr(argv[c], '/') == NULL)
+                                       continue;
+                               if (access(argv[c], R_OK) == -1) {
+                                       warn("%s", argv[c]);
+                                       continue;
+                               }
+                               res = mandoc_reallocarray(res,
+                                   sz + 1, sizeof(*res));
+                               res[sz].file = mandoc_strdup(argv[c]);
+                               res[sz].names = NULL;
+                               res[sz].output = NULL;
+                               res[sz].ipath = SIZE_MAX;
+                               res[sz].bits = 0;
+                               res[sz].sec = 10;
+                               res[sz].form = FORM_SRC;
+                               sz++;
+                       }
+               }

 
 

-       (void)fprintf(stderr, "usage: %s\n", __progname);
-       exit(1);
-       /* NOTREACHED */
-}
+               if (sz == 0) {
+                       if (search.argmode != ARG_NAME)
+                               warnx("nothing appropriate");
+                       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 = 20;
+               } 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. */
+                               sec = res[i].file;
+                               sec += strcspn(sec, "123456789");
+                               if (sec[0] == '\0')
+                                       continue;
+                               prio = sec_prios[sec[0] - '1'];
+                               if (sec[1] != '/')
+                                       prio += 10;
+                               if (prio >= best_prio)
+                                       continue;
+                               best_prio = prio;
+                               resp = res + i;
+                       }
+               }

 
 

-static int
-file(char **ln, size_t *lnsz, char **buf, size_t *bufsz, 
-               const char *file, struct mdoc *mdoc)
-{
-       int              fd, c;
+               /*
+                * 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 (-1 == (fd = open(file, O_RDONLY, 0))) {
-               warn("%s", file);
-               return(0);
+               if (outmode == OUTMODE_FLN || outmode == OUTMODE_LST)
+                       goto out;

        }
 
        }
 

-       c = fdesc(ln, lnsz, buf, bufsz, file, fd, mdoc);
-
-       if (-1 == close(fd))
-               warn("%s", file);
+       /* mandoc(1) */

 
 

-       return(c);
-}
+#if HAVE_PLEDGE
+       if (use_pager) {
+               if (pledge("stdio rpath tmppath tty proc exec", NULL) == -1)
+                       err((int)MANDOCLEVEL_SYSERR, "pledge");
+       } else {
+               if (pledge("stdio rpath", NULL) == -1)
+                       err((int)MANDOCLEVEL_SYSERR, "pledge");
+       }
+#endif

 
 

+       if (search.argmode == ARG_FILE)
+               moptions(&options, auxpaths);

 
 

-static int
-fdesc(char **lnp, size_t *lnsz, char **bufp, size_t *bufsz, 
-               const char *f, int fd, struct mdoc *mdoc)
-{
-       size_t           sz;
-       ssize_t          ssz;
-       struct stat      st;
-       int              j, i, pos, lnn;
-       char            *ln, *buf;
+       mchars_alloc();
+       curp.mp = mparse_alloc(options, curp.mmin, mmsg,
+           curp.os_e, curp.os_s);

 
 

-       buf = *bufp;
-       ln = *lnp;
+       if (argc < 1) {
+               if (use_pager)
+                       tag_files = tag_init();
+               parse(&curp, STDIN_FILENO, "<stdin>");
+       }

 
        /*
 
        /*

-        * Two buffers: ln and buf.  buf is the input buffer, optimised
-        * for each file's block size.  ln is a line buffer.  Both
-        * growable, hence passed in by ptr-ptr.
+        * Remember the original working directory, if possible.
+        * This will be needed if some names on the command line
+        * are page names and some are relative file names.
+        * Do not error out if the current directory is not
+        * readable: Maybe it won't be needed after all.

         */
         */

+       startdir = open(".", O_RDONLY | O_DIRECTORY);
+
+       while (argc > 0) {
+
+               /*
+                * Changing directories is not needed in ARG_FILE mode.
+                * Do it on a best-effort basis.  Even in case of
+                * failure, some functionality may still work.
+                */
+               if (resp != NULL) {
+                       if (resp->ipath != SIZE_MAX)
+                               (void)chdir(conf.manpath.paths[resp->ipath]);
+                       else if (startdir != -1)
+                               (void)fchdir(startdir);
+               }

 
 

-       if (-1 == fstat(fd, &st)) {
-               warnx("%s", f);
-               sz = BUFSIZ;
-       } else 
-               sz = (unsigned)BUFSIZ > st.st_blksize ?
-                       (size_t)BUFSIZ : st.st_blksize;
+               fd = mparse_open(curp.mp, resp != NULL ? resp->file : *argv);
+               if (fd != -1) {
+                       if (use_pager) {
+                               tag_files = tag_init();
+                               use_pager = 0;
+                       }

 
 

-       if (sz > *bufsz) {
-               if (NULL == (buf = realloc(buf, sz)))
-                       err(1, "realloc");
-               *bufp = buf;
-               *bufsz = sz;
-       }
+                       if (resp == NULL)
+                               parse(&curp, fd, *argv);
+                       else if (resp->form == FORM_SRC)
+                               parse(&curp, fd, resp->file);
+                       else
+                               passthrough(resp->file, fd,
+                                   conf.output.synopsisonly);
+
+                       if (ferror(stdout)) {
+                               if (tag_files != NULL) {
+                                       warn("%s", tag_files->ofn);
+                                       tag_unlink();
+                                       tag_files = NULL;
+                               } else
+                                       warn("stdout");
+                               rc = MANDOCLEVEL_SYSERR;
+                               break;
+                       }

 
 

-       /*
-        * Fill buf with file blocksize and parse newlines into ln.
-        */
+                       if (argc > 1 && curp.outtype <= OUTT_UTF8) {
+                               if (curp.outdata == NULL)
+                                       outdata_alloc(&curp);
+                               terminal_sepline(curp.outdata);
+                       }
+               } else if (rc < MANDOCLEVEL_ERROR)
+                       rc = MANDOCLEVEL_ERROR;

 
 

-       for (lnn = 1, pos = 0; ; ) {
-               if (-1 == (ssz = read(fd, buf, sz))) {
-                       warn("%s", f);
-                       return(0);
-               } else if (0 == ssz) 
+               if (MANDOCLEVEL_OK != rc && curp.wstop)

                        break;
 
                        break;
 

-               for (i = 0; i < (int)ssz; i++) {
-                       if (pos >= (int)*lnsz) {
-                               *lnsz += 256; /* Step-size. */
-                               ln = realloc(ln, *lnsz);
-                               if (NULL == ln)
-                                       err(1, "realloc");
-                               *lnp = ln;
-                       }
+               if (resp != NULL)
+                       resp++;
+               else
+                       argv++;
+               if (--argc)
+                       mparse_reset(curp.mp);
+       }
+       if (startdir != -1) {
+               (void)fchdir(startdir);
+               close(startdir);
+       }

 
 

-                       if ('\n' != buf[i]) {
-                               ln[pos++] = buf[i];
+       if (curp.outdata != NULL) {
+               switch (curp.outtype) {
+               case OUTT_HTML:
+                       html_free(curp.outdata);
+                       break;
+               case OUTT_UTF8:
+               case OUTT_LOCALE:
+               case OUTT_ASCII:
+                       ascii_free(curp.outdata);
+                       break;
+               case OUTT_PDF:
+               case OUTT_PS:
+                       pspdf_free(curp.outdata);
+                       break;
+               default:
+                       break;
+               }
+       }
+       mandoc_xr_free();
+       mparse_free(curp.mp);
+       mchars_free();
+
+out:
+       if (search.argmode != ARG_FILE) {
+               manconf_free(&conf);
+               mansearch_free(res, sz);
+       }
+
+       free(curp.os_s);
+
+       /*
+        * When using a pager, finish writing both temporary files,
+        * fork it, wait for the user to close it, and clean up.
+        */
+
+       if (tag_files != NULL) {
+               fclose(stdout);
+               tag_write();
+               man_pgid = getpgid(0);
+               tag_files->tcpgid = man_pgid == getpid() ?
+                   getpgid(getppid()) : man_pgid;
+               pager_pid = 0;
+               signum = SIGSTOP;
+               for (;;) {
+
+                       /* Stop here until moved to the foreground. */
+
+                       tc_pgid = tcgetpgrp(tag_files->ofd);
+                       if (tc_pgid != man_pgid) {
+                               if (tc_pgid == pager_pid) {
+                                       (void)tcsetpgrp(tag_files->ofd,
+                                           man_pgid);
+                                       if (signum == SIGTTIN)
+                                               continue;
+                               } else
+                                       tag_files->tcpgid = tc_pgid;
+                               kill(0, signum);

                                continue;
                        }
 
                                continue;
                        }
 

-                       /* Check for CPP-escaped newline.  */
+                       /* Once in the foreground, activate the pager. */

 
 

-                       if (pos > 0 && '\\' == ln[pos - 1]) {
-                               for (j = pos - 1; j >= 0; j--)
-                                       if ('\\' != ln[j])
-                                               break;
+                       if (pager_pid) {
+                               (void)tcsetpgrp(tag_files->ofd, pager_pid);
+                               kill(pager_pid, SIGCONT);
+                       } else
+                               pager_pid = spawn_pager(tag_files);

 
 

-                               if ( ! ((pos - j) % 2)) {
-                                       pos--;
-                                       lnn++;
-                                       continue;
-                               }
+                       /* Wait for the pager to stop or exit. */
+
+                       while ((pid = waitpid(pager_pid, &status,
+                           WUNTRACED)) == -1 && errno == EINTR)
+                               continue;
+
+                       if (pid == -1) {
+                               warn("wait");
+                               rc = MANDOCLEVEL_SYSERR;
+                               break;

                        }
                        }

+                       if (!WIFSTOPPED(status))
+                               break;

 
 

-                       ln[pos] = 0;
-                       if ( ! mdoc_parseln(mdoc, lnn, ln))
-                               return(0);
-                       lnn++;
-                       pos = 0;
+                       signum = WSTOPSIG(status);

                }
                }

+               tag_unlink();

        }
 
        }
 

-       return(mdoc_endparse(mdoc));
+       return (int)rc;

 }
 
 }
 

+static void
+usage(enum argmode argmode)
+{
+
+       switch (argmode) {
+       case ARG_FILE:
+               fputs("usage: mandoc [-ac] [-I os=name] "
+                   "[-K encoding] [-mdoc | -man] [-O options]\n"
+                   "\t      [-T output] [-W level] [file ...]\n", stderr);
+               break;
+       case ARG_NAME:
+               fputs("usage: man [-acfhklw] [-C file] [-M path] "
+                   "[-m path] [-S subsection]\n"
+                   "\t   [[-s] section] name ...\n", stderr);
+               break;
+       case ARG_WORD:
+               fputs("usage: whatis [-afk] [-C file] "
+                   "[-M path] [-m path] [-O outkey] [-S arch]\n"
+                   "\t      [-s section] name ...\n", stderr);
+               break;
+       case ARG_EXPR:
+               fputs("usage: apropos [-afk] [-C file] "
+                   "[-M path] [-m path] [-O outkey] [-S arch]\n"
+                   "\t       [-s section] expression ...\n", stderr);
+               break;
+       }
+       exit((int)MANDOCLEVEL_BADARG);
+}

 
 static int
 
 static int

-toptions(enum outt *tflags, char *arg)
+fs_lookup(const struct manpaths *paths, size_t ipath,
+       const char *sec, const char *arch, const char *name,
+       struct manpage **res, size_t *ressz)

 {
 {

-
-       if (0 == strcmp(arg, "ascii"))
-               *tflags = OUTT_ASCII;
-       else if (0 == strcmp(arg, "latin1"))
-               *tflags = OUTT_LATIN1;
-       else if (0 == strcmp(arg, "utf8"))
-               *tflags = OUTT_UTF8;
-       else if (0 == strcmp(arg, "lint"))
-               *tflags = OUTT_LINT;
-       else if (0 == strcmp(arg, "tree"))
-               *tflags = OUTT_TREE;
-       else {
-               warnx("bad argument: -T%s", arg);
-               return(0);
+       glob_t           globinfo;
+       struct manpage  *page;
+       char            *file;
+       int              globres;
+       enum form        form;
+
+       form = FORM_SRC;
+       mandoc_asprintf(&file, "%s/man%s/%s.%s",
+           paths->paths[ipath], sec, name, sec);
+       if (access(file, R_OK) != -1)
+               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)
+                       goto found;
+               free(file);

        }
 
        }
 

-       return(1);
+       mandoc_asprintf(&file, "%s/man%s/%s.[01-9]*",
+           paths->paths[ipath], sec, name);
+       globres = glob(file, 0, NULL, &globinfo);
+       if (globres != 0 && globres != GLOB_NOMATCH)
+               warn("%s: glob", file);
+       free(file);
+       if (globres == 0)
+               file = mandoc_strdup(*globinfo.gl_pathv);
+       globfree(&globinfo);
+       if (globres == 0)
+               goto found;
+       if (res != NULL || ipath + 1 != paths->sz)
+               return 0;
+
+       mandoc_asprintf(&file, "%s.%s", name, sec);
+       globres = access(file, R_OK);
+       free(file);
+       return globres != -1;
+
+found:
+       warnx("outdated mandoc.db lacks %s(%s) entry, run %s %s",
+           name, sec, BINM_MAKEWHATIS, paths->paths[ipath]);
+       if (res == NULL) {
+               free(file);
+               return 1;
+       }
+       *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;

 }
 
 }
 

-
-/*
- * Parse out the options for [-fopt...] setting compiler options.  These
- * can be comma-delimited or called again.
- */

 static int
 static int

-foptions(int *fflags, char *arg)
+fs_search(const struct mansearch *cfg, const struct manpaths *paths,
+       int argc, char **argv, struct manpage **res, size_t *ressz)

 {
 {

-       char            *v;
-       char            *toks[4];
+       const char *const sections[] =
+           {"1", "8", "6", "2", "3", "5", "7", "4", "9", "3p"};
+       const size_t nsec = sizeof(sections)/sizeof(sections[0]);
+
+       size_t           ipath, isec, lastsz;
+
+       assert(cfg->argmode == ARG_NAME);
+
+       if (res != NULL)
+               *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 1;
+                       } else for (isec = 0; isec < nsec; isec++)
+                               if (fs_lookup(paths, ipath, sections[isec],
+                                   cfg->arch, *argv, res, ressz) &&
+                                   cfg->firstmatch)
+                                       return 1;
+               }
+               if (res != NULL && *ressz == lastsz &&
+                   strchr(*argv, '/') == NULL) {
+                       if (cfg->sec == NULL)
+                               warnx("No entry for %s in the manual.",
+                                   *argv);
+                       else
+                               warnx("No entry for %s in section %s "
+                                   "of the manual.", *argv, cfg->sec);
+               }
+               lastsz = *ressz;
+               argv++;
+               argc--;
+       }
+       return 0;
+}
+
+static void
+parse(struct curparse *curp, int fd, const char *file)
+{
+       enum mandoclevel  rctmp;
+       struct roff_man  *man;
+
+       /* Begin by parsing the file itself. */

 
 

-       toks[0] = "ign-scope";
-       toks[1] = "ign-escape";
-       toks[2] = "ign-macro";
-       toks[3] = NULL;
+       assert(file);
+       assert(fd >= 0);

 
 

-       while (*arg) 
-               switch (getsubopt(&arg, toks, &v)) {
-               case (0):
-                       *fflags |= MDOC_IGN_SCOPE;
+       rctmp = mparse_readfd(curp->mp, fd, file);
+       if (fd != STDIN_FILENO)
+               close(fd);
+       if (rc < rctmp)
+               rc = rctmp;
+
+       /*
+        * With -Wstop and warnings or errors of at least the requested
+        * level, do not produce output.
+        */
+
+       if (rctmp != MANDOCLEVEL_OK && curp->wstop)
+               return;
+
+       if (curp->outdata == NULL)
+               outdata_alloc(curp);
+
+       mparse_result(curp->mp, &man, NULL);
+
+       /* Execute the out device, if it exists. */
+
+       if (man == NULL)
+               return;
+       mandoc_xr_reset();
+       if (man->macroset == MACROSET_MDOC) {
+               if (curp->outtype != OUTT_TREE || !curp->outopts->noval)
+                       mdoc_validate(man);
+               switch (curp->outtype) {
+               case OUTT_HTML:
+                       html_mdoc(curp->outdata, man);
+                       break;
+               case OUTT_TREE:
+                       tree_mdoc(curp->outdata, man);
+                       break;
+               case OUTT_MAN:
+                       man_mdoc(curp->outdata, man);
+                       break;
+               case OUTT_PDF:
+               case OUTT_ASCII:
+               case OUTT_UTF8:
+               case OUTT_LOCALE:
+               case OUTT_PS:
+                       terminal_mdoc(curp->outdata, man);
+                       break;
+               case OUTT_MARKDOWN:
+                       markdown_mdoc(curp->outdata, man);
+                       break;
+               default:

                        break;
                        break;

-               case (1):
-                       *fflags |= MDOC_IGN_ESCAPE;
+               }
+       }
+       if (man->macroset == MACROSET_MAN) {
+               if (curp->outtype != OUTT_TREE || !curp->outopts->noval)
+                       man_validate(man);
+               switch (curp->outtype) {
+               case OUTT_HTML:
+                       html_man(curp->outdata, man);
+                       break;
+               case OUTT_TREE:
+                       tree_man(curp->outdata, man);
+                       break;
+               case OUTT_MAN:
+                       mparse_copy(curp->mp);

                        break;
                        break;

-               case (2):
-                       *fflags |= MDOC_IGN_MACRO;
+               case OUTT_PDF:
+               case OUTT_ASCII:
+               case OUTT_UTF8:
+               case OUTT_LOCALE:
+               case OUTT_PS:
+                       terminal_man(curp->outdata, man);

                        break;
                default:
                        break;
                default:

-                       warnx("bad argument: -f%s", arg);
-                       return(0);
+                       break;

                }
                }

+       }
+       if (curp->mmin < MANDOCERR_STYLE)
+               check_xr(file);
+       mparse_updaterc(curp->mp, &rc);
+}

 
 

-       return(1);
+static void
+check_xr(const char *file)
+{
+       static struct manpaths   paths;
+       struct mansearch         search;
+       struct mandoc_xr        *xr;
+       char                    *cp;
+       size_t                   sz;
+
+       if (paths.sz == 0)
+               manpath_base(&paths);
+
+       for (xr = mandoc_xr_get(); xr != NULL; xr = xr->next) {
+               if (xr->line == -1)
+                       continue;
+               search.arch = NULL;
+               search.sec = xr->sec;
+               search.outkey = NULL;
+               search.argmode = ARG_NAME;
+               search.firstmatch = 1;
+               if (mansearch(&search, &paths, 1, &xr->name, NULL, &sz))
+                       continue;
+               if (fs_search(&search, &paths, 1, &xr->name, NULL, &sz))
+                       continue;
+               if (xr->count == 1)
+                       mandoc_asprintf(&cp, "Xr %s %s", xr->name, xr->sec);
+               else
+                       mandoc_asprintf(&cp, "Xr %s %s (%d times)",
+                           xr->name, xr->sec, xr->count);
+               mmsg(MANDOCERR_XR_BAD, MANDOCLEVEL_STYLE,
+                   file, xr->line, xr->pos + 1, cp);
+               free(cp);
+       }

 }
 
 }
 

+static void
+outdata_alloc(struct curparse *curp)
+{
+       switch (curp->outtype) {
+       case OUTT_HTML:
+               curp->outdata = html_alloc(curp->outopts);
+               break;
+       case OUTT_UTF8:
+               curp->outdata = utf8_alloc(curp->outopts);
+               break;
+       case OUTT_LOCALE:
+               curp->outdata = locale_alloc(curp->outopts);
+               break;
+       case OUTT_ASCII:
+               curp->outdata = ascii_alloc(curp->outopts);
+               break;
+       case OUTT_PDF:
+               curp->outdata = pdf_alloc(curp->outopts);
+               break;
+       case OUTT_PS:
+               curp->outdata = ps_alloc(curp->outopts);
+               break;
+       default:
+               break;
+       }
+}
+
+static void
+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, *cp;
+       size_t           linesz;
+       ssize_t          len, written;
+       int              print;
+
+       line = NULL;
+       linesz = 0;
+
+       if (fflush(stdout) == EOF) {
+               syscall = "fflush";
+               goto fail;
+       }
+
+       if ((stream = fdopen(fd, "r")) == NULL) {
+               close(fd);
+               syscall = "fdopen";
+               goto fail;
+       }
+
+       print = 0;
+       while ((len = getline(&line, &linesz, stream)) != -1) {
+               cp = line;
+               if (synopsis_only) {
+                       if (print) {
+                               if ( ! isspace((unsigned char)*cp))
+                                       goto done;
+                               while (isspace((unsigned char)*cp)) {
+                                       cp++;
+                                       len--;
+                               }
+                       } else {
+                               if (strcmp(cp, synb) == 0 ||
+                                   strcmp(cp, synr) == 0)
+                                       print = 1;
+                               continue;
+                       }
+               }
+               for (; len > 0; len -= written) {
+                       if ((written = write(STDOUT_FILENO, cp, len)) != -1)
+                               continue;
+                       fclose(stream);
+                       syscall = "write";
+                       goto fail;
+               }
+       }
+
+       if (ferror(stream)) {
+               fclose(stream);
+               syscall = "getline";
+               goto fail;
+       }
+
+done:
+       free(line);
+       fclose(stream);
+       return;
+
+fail:
+       free(line);
+       warn("%s: SYSERR: %s", file, syscall);
+       if (rc < MANDOCLEVEL_SYSERR)
+               rc = MANDOCLEVEL_SYSERR;
+}

 
 

-/* 
- * Parse out the options for [-Werr...], which sets warning modes.
- * These can be comma-delimited or called again.  
- */

 static int
 static int

-woptions(int *wflags, char *arg)
+koptions(int *options, char *arg)

 {
 {

-       char            *v;
-       char            *toks[5]; 

 
 

-       toks[0] = "all";
-       toks[1] = "compat";
-       toks[2] = "syntax";
-       toks[3] = "error";
-       toks[4] = NULL;
+       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 {
+               warnx("-K %s: Bad argument", arg);
+               return 0;
+       }
+       return 1;
+}

 
 

-       while (*arg) 
-               switch (getsubopt(&arg, toks, &v)) {
-               case (0):
-                       *wflags |= WARN_WALL;
+static void
+moptions(int *options, char *arg)
+{
+
+       if (arg == NULL)
+               return;
+       if (strcmp(arg, "doc") == 0)
+               *options |= MPARSE_MDOC;
+       else if (strcmp(arg, "an") == 0)
+               *options |= MPARSE_MAN;
+}
+
+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->mmin = MANDOCERR_BASE;
+               mmsg_stream = stdout;
+       } 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, "markdown"))
+               curp->outtype = OUTT_MARKDOWN;
+       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, "ps"))
+               curp->outtype = OUTT_PS;
+       else if (0 == strcmp(arg, "pdf"))
+               curp->outtype = OUTT_PDF;
+       else {
+               warnx("-T %s: Bad argument", arg);
+               return 0;
+       }
+
+       return 1;
+}
+
+static int
+woptions(struct curparse *curp, char *arg)
+{
+       char            *v, *o;
+       const char      *toks[11];
+
+       toks[0] = "stop";
+       toks[1] = "all";
+       toks[2] = "base";
+       toks[3] = "style";
+       toks[4] = "warning";
+       toks[5] = "error";
+       toks[6] = "unsupp";
+       toks[7] = "fatal";
+       toks[8] = "openbsd";
+       toks[9] = "netbsd";
+       toks[10] = NULL;
+
+       while (*arg) {
+               o = arg;
+               switch (getsubopt(&arg, (char * const *)toks, &v)) {
+               case 0:
+                       curp->wstop = 1;
+                       break;
+               case 1:
+               case 2:
+                       curp->mmin = MANDOCERR_BASE;

                        break;
                        break;

-               case (1):
-                       *wflags |= WARN_WCOMPAT;
+               case 3:
+                       curp->mmin = MANDOCERR_STYLE;

                        break;
                        break;

-               case (2):
-                       *wflags |= WARN_WSYNTAX;
+               case 4:
+                       curp->mmin = MANDOCERR_WARNING;

                        break;
                        break;

-               case (3):
-                       *wflags |= WARN_WERR;
+               case 5:
+                       curp->mmin = MANDOCERR_ERROR;
+                       break;
+               case 6:
+                       curp->mmin = MANDOCERR_UNSUPP;
+                       break;
+               case 7:
+                       curp->mmin = MANDOCERR_MAX;
+                       break;
+               case 8:
+                       curp->mmin = MANDOCERR_BASE;
+                       curp->os_e = MANDOC_OS_OPENBSD;
+                       break;
+               case 9:
+                       curp->mmin = MANDOCERR_BASE;
+                       curp->os_e = MANDOC_OS_NETBSD;

                        break;
                default:
                        break;
                default:

-                       warnx("bad argument: -W%s", arg);
-                       return(0);
+                       warnx("-W %s: Bad argument", o);
+                       return 0;

                }
                }

-
-       return(1);
+       }
+       return 1;

 }
 
 }
 

-
-static int
-merr(void *arg, int line, int col, const char *msg)
+static void
+mmsg(enum mandocerr t, enum mandoclevel lvl,
+               const char *file, int line, int col, const char *msg)

 {
 {

+       const char      *mparse_msg;

 
 

-       warnx("error: %s (line %d, column %d)", msg, line, col);
-       return(0);
-}
+       fprintf(mmsg_stream, "%s: %s:", getprogname(),
+           file == NULL ? "<stdin>" : file);

 
 

+       if (line)
+               fprintf(mmsg_stream, "%d:%d:", line, col + 1);

 
 

-static int
-mwarn(void *arg, int line, int col, 
-               enum mdoc_warn type, const char *msg)
+       fprintf(mmsg_stream, " %s", mparse_strlevel(lvl));
+
+       if ((mparse_msg = mparse_strerror(t)) != NULL)
+               fprintf(mmsg_stream, ": %s", mparse_msg);
+
+       if (msg)
+               fprintf(mmsg_stream, ": %s", msg);
+
+       fputc('\n', mmsg_stream);
+}
+
+static pid_t
+spawn_pager(struct tag_files *tag_files)

 {
 {

-       int              flags;
-       char            *wtype;
+       const struct timespec timeout = { 0, 100000000 };  /* 0.1s */
+#define MAX_PAGER_ARGS 16
+       char            *argv[MAX_PAGER_ARGS];
+       const char      *pager;
+       char            *cp;
+       size_t           cmdlen;
+       int              argc;
+       pid_t            pager_pid;
+
+       pager = getenv("MANPAGER");
+       if (pager == NULL || *pager == '\0')
+               pager = getenv("PAGER");
+       if (pager == NULL || *pager == '\0')
+               pager = "more -s";
+       cp = mandoc_strdup(pager);

 
 

-       flags = *(int *)arg;
-       wtype = NULL;
+       /*
+        * Parse the pager command into words.
+        * Intentionally do not do anything fancy here.
+        */

 
 

-       switch (type) {
-       case (WARN_COMPAT):
-               wtype = "compat";
-               if (flags & WARN_WCOMPAT)
+       argc = 0;
+       while (argc + 4 < MAX_PAGER_ARGS) {
+               argv[argc++] = cp;
+               cp = strchr(cp, ' ');
+               if (cp == NULL)

                        break;
                        break;

-               return(1);
-       case (WARN_SYNTAX):
-               wtype = "syntax";
-               if (flags & WARN_WSYNTAX)
+               *cp++ = '\0';
+               while (*cp == ' ')
+                       cp++;
+               if (*cp == '\0')

                        break;
                        break;

-               return(1);

        }
 
        }
 

-       assert(wtype);
-       warnx("%s warning: %s (line %d, column %d)", 
-                       wtype, msg, line, col);
+       /* For less(1), use the tag file. */

 
 

-       if ( ! (flags & WARN_WERR))
-               return(1);
+       if ((cmdlen = strlen(argv[0])) >= 4) {
+               cp = argv[0] + cmdlen - 4;
+               if (strcmp(cp, "less") == 0) {
+                       argv[argc++] = mandoc_strdup("-T");
+                       argv[argc++] = tag_files->tfn;
+               }
+       }
+       argv[argc++] = tag_files->ofn;
+       argv[argc] = NULL;

 
 

-       warnx("%s: considering warnings as errors", 
-                       __progname);
-       return(0);
-}
+       switch (pager_pid = fork()) {
+       case -1:
+               err((int)MANDOCLEVEL_SYSERR, "fork");
+       case 0:
+               break;
+       default:
+               (void)setpgid(pager_pid, 0);
+               (void)tcsetpgrp(tag_files->ofd, pager_pid);
+#if HAVE_PLEDGE
+               if (pledge("stdio rpath tmppath tty proc", NULL) == -1)
+                       err((int)MANDOCLEVEL_SYSERR, "pledge");
+#endif
+               tag_files->pager_pid = pager_pid;
+               return pager_pid;
+       }
+
+       /* The child process becomes the pager. */

 
 

+       if (dup2(tag_files->ofd, STDOUT_FILENO) == -1)
+               err((int)MANDOCLEVEL_SYSERR, "pager stdout");
+       close(tag_files->ofd);
+       assert(tag_files->tfd == -1);

 
 

+       /* Do not start the pager before controlling the terminal. */
+
+       while (tcgetpgrp(STDOUT_FILENO) != getpid())
+               nanosleep(&timeout, NULL);
+
+       execvp(argv[0], argv);
+       err((int)MANDOCLEVEL_SYSERR, "exec %s", argv[0]);
+}