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Disentangle the MANDOCERR_CHILD message, which reported three
[mandoc.git] / read.c
diff --git a/read.c b/read.c
index afbf849ce3968d62659cf7064b4bc84451a6992b..a60f42f970776e1abe2593ed9553ce1ab7f02341 100644 (file)
--- a/read.c
+++ b/read.c
@@ -1,7 +1,8 @@
-/*     $Id: read.c,v 1.11 2011/04/04 23:04:38 kristaps Exp $ */
+/*     $Id: read.c,v 1.57 2014/07/02 13:10:45 schwarze Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
- * Copyright (c) 2010, 2011 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2010-2014 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2010, 2012 Joerg Sonnenberger <joerg@netbsd.org>
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -19,31 +20,33 @@
 #include "config.h"
 #endif
 
 #include "config.h"
 #endif
 
-#include <sys/stat.h>
-#include <sys/mman.h>
+#ifdef HAVE_MMAP
+# include <sys/stat.h>
+# include <sys/mman.h>
+#endif
 
 #include <assert.h>
 #include <ctype.h>
 
 #include <assert.h>
 #include <ctype.h>
+#include <errno.h>
 #include <fcntl.h>
 #include <stdarg.h>
 #include <fcntl.h>
 #include <stdarg.h>
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
 #include "mandoc.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
 #include "mandoc.h"
+#include "mandoc_aux.h"
 #include "libmandoc.h"
 #include "mdoc.h"
 #include "man.h"
 #include "libmandoc.h"
 #include "mdoc.h"
 #include "man.h"
-
-#ifndef MAP_FILE
-#define        MAP_FILE        0
-#endif
+#include "main.h"
 
 #define        REPARSE_LIMIT   1000
 
 struct buf {
 
 #define        REPARSE_LIMIT   1000
 
 struct buf {
-       char             *buf; /* binary input buffer */
+       char             *buf; /* binary input buffer */
        size_t            sz; /* size of binary buffer */
 };
 
        size_t            sz; /* size of binary buffer */
 };
 
@@ -51,26 +54,28 @@ struct      mparse {
        enum mandoclevel  file_status; /* status of current parse */
        enum mandoclevel  wlevel; /* ignore messages below this */
        int               line; /* line number in the file */
        enum mandoclevel  file_status; /* status of current parse */
        enum mandoclevel  wlevel; /* ignore messages below this */
        int               line; /* line number in the file */
-       enum mparset      inttype; /* which parser to use */
+       int               options; /* parser options */
        struct man       *pman; /* persistent man parser */
        struct mdoc      *pmdoc; /* persistent mdoc parser */
        struct man       *man; /* man parser */
        struct mdoc      *mdoc; /* mdoc parser */
        struct roff      *roff; /* roff parser (!NULL) */
        struct man       *pman; /* persistent man parser */
        struct mdoc      *pmdoc; /* persistent mdoc parser */
        struct man       *man; /* man parser */
        struct mdoc      *mdoc; /* mdoc parser */
        struct roff      *roff; /* roff parser (!NULL) */
-       struct regset     regs; /* roff registers */
+       char             *sodest; /* filename pointed to by .so */
        int               reparse_count; /* finite interp. stack */
        mandocmsg         mmsg; /* warning/error message handler */
        int               reparse_count; /* finite interp. stack */
        mandocmsg         mmsg; /* warning/error message handler */
-       void             *arg; /* argument to mmsg */
-       const char       *file; 
+       const char       *file;
+       struct buf       *secondary;
+       char             *defos; /* default operating system */
 };
 
 static void      resize_buf(struct buf *, size_t);
 static void      mparse_buf_r(struct mparse *, struct buf, int);
 };
 
 static void      resize_buf(struct buf *, size_t);
 static void      mparse_buf_r(struct mparse *, struct buf, int);
-static void      mparse_readfd_r(struct mparse *, int, const char *, int);
 static void      pset(const char *, int, struct mparse *);
 static void      pset(const char *, int, struct mparse *);
-static void      pdesc(struct mparse *, const char *, int);
-static int       read_whole_file(const char *, int, struct buf *, int *);
+static int       read_whole_file(struct mparse *, const char *, int,
+                               struct buf *, int *);
 static void      mparse_end(struct mparse *);
 static void      mparse_end(struct mparse *);
+static void      mparse_parse_buffer(struct mparse *, struct buf,
+                       const char *);
 
 static const enum mandocerr    mandoclimits[MANDOCLEVEL_MAX] = {
        MANDOCERR_OK,
 
 static const enum mandocerr    mandoclimits[MANDOCLEVEL_MAX] = {
        MANDOCERR_OK,
@@ -88,33 +93,38 @@ static      const char * const      mandocerrs[MANDOCERR_MAX] = {
        "generic warning",
 
        /* related to the prologue */
        "generic warning",
 
        /* related to the prologue */
-       "no title in document",
-       "document title should be all caps",
+       "missing .TH macro, using \"unknown 1\"",
+       "lower case character in document title",
        "unknown manual section",
        "unknown manual section",
-       "date missing, using today's date",
+       "unknown manual volume or arch",
+       "missing date, using today's date",
        "cannot parse date, using it verbatim",
        "prologue macros out of order",
        "duplicate prologue macro",
        "cannot parse date, using it verbatim",
        "prologue macros out of order",
        "duplicate prologue macro",
-       "macro not allowed in prologue",
-       "macro not allowed in body",
+       "incomplete prologue, terminated by",
+       "skipping prologue macro in body",
 
        /* related to document structure */
        ".so is fragile, better use ln(1)",
 
        /* related to document structure */
        ".so is fragile, better use ln(1)",
-       "NAME section must come first",
+       "no document body",
+       "content before first section header",
+       "first section is not \"NAME\"",
        "bad NAME section contents",
        "bad NAME section contents",
-       "manual name not yet set",
        "sections out of conventional order",
        "sections out of conventional order",
-       "duplicate section name",
-       "section not in conventional manual section",
+       "duplicate section title",
+       "unexpected section",
 
        /* related to macros and nesting */
 
        /* related to macros and nesting */
-       "skipping obsolete macro",
+       "obsolete macro",
        "skipping paragraph macro",
        "skipping paragraph macro",
+       "moving paragraph macro out of list",
        "skipping no-space macro",
        "blocks badly nested",
        "skipping no-space macro",
        "blocks badly nested",
-       "child violates parent syntax",
        "nested displays are not portable",
        "nested displays are not portable",
-       "already in literal mode",
+       "moving content out of list",
+       ".Vt block has child macro",
+       "fill mode already enabled, skipping .fi",
+       "fill mode already disabled, skipping .nf",
        "line scope broken",
 
        /* related to missing macro arguments */
        "line scope broken",
 
        /* related to missing macro arguments */
@@ -124,7 +134,6 @@ static      const char * const      mandocerrs[MANDOCERR_MAX] = {
        "list type must come first",
        "tag lists require a width argument",
        "missing font type",
        "list type must come first",
        "tag lists require a width argument",
        "missing font type",
-       "skipping end of block that is not open",
 
        /* related to bad macro arguments */
        "skipping argument",
 
        /* related to bad macro arguments */
        "skipping argument",
@@ -142,11 +151,18 @@ static    const char * const      mandocerrs[MANDOCERR_MAX] = {
        "tab in non-literal context",
        "end of line whitespace",
        "bad comment style",
        "tab in non-literal context",
        "end of line whitespace",
        "bad comment style",
-       "unknown escape sequence",
+       "bad escape sequence",
        "unterminated quoted string",
        "unterminated quoted string",
-       
+
        "generic error",
 
        "generic error",
 
+       /* related to equations */
+       "unexpected equation scope closure",
+       "equation scope open on exit",
+       "overlapping equation scopes",
+       "unexpected end of equation",
+       "equation syntax error",
+
        /* related to tables */
        "bad table syntax",
        "bad table option",
        /* related to tables */
        "bad table syntax",
        "bad table option",
@@ -160,10 +176,13 @@ static    const char * const      mandocerrs[MANDOCERR_MAX] = {
        "input stack limit exceeded, infinite loop?",
        "skipping bad character",
        "escaped character not allowed in a name",
        "input stack limit exceeded, infinite loop?",
        "skipping bad character",
        "escaped character not allowed in a name",
-       "skipping text before the first section header",
+       "manual name not yet set",
+       "skipping text before first section header",
        "skipping unknown macro",
        "NOT IMPLEMENTED, please use groff: skipping request",
        "argument count wrong",
        "skipping unknown macro",
        "NOT IMPLEMENTED, please use groff: skipping request",
        "argument count wrong",
+       "skipping invalid content in .Rs block",
+       "skipping column outside column list",
        "skipping end of block that is not open",
        "missing end of block",
        "scope open on exit",
        "skipping end of block that is not open",
        "missing end of block",
        "scope open on exit",
@@ -171,23 +190,28 @@ static    const char * const      mandocerrs[MANDOCERR_MAX] = {
        "macro requires line argument(s)",
        "macro requires body argument(s)",
        "macro requires argument(s)",
        "macro requires line argument(s)",
        "macro requires body argument(s)",
        "macro requires argument(s)",
+       "request requires a numeric argument",
        "missing list type",
        "line argument(s) will be lost",
        "missing list type",
        "line argument(s) will be lost",
-       "body argument(s) will be lost",
 
        "generic fatal error",
 
 
        "generic fatal error",
 
+       "input too large",
        "not a manual",
        "column syntax is inconsistent",
        "NOT IMPLEMENTED: .Bd -file",
        "not a manual",
        "column syntax is inconsistent",
        "NOT IMPLEMENTED: .Bd -file",
-       "line scope broken, syntax violated",
        "argument count wrong, violates syntax",
        "child violates parent syntax",
        "argument count wrong, violates syntax",
        "NOT IMPLEMENTED: .so with absolute path or \"..\"",
        "argument count wrong, violates syntax",
        "child violates parent syntax",
        "argument count wrong, violates syntax",
        "NOT IMPLEMENTED: .so with absolute path or \"..\"",
-       "no document body",
+       ".so request failed",
        "no document prologue",
        "static buffer exhausted",
        "no document prologue",
        "static buffer exhausted",
+
+       /* system errors */
+       NULL,
+       "cannot stat file",
+       "cannot read file",
 };
 
 static const char * const      mandoclevels[MANDOCLEVEL_MAX] = {
 };
 
 static const char * const      mandoclevels[MANDOCLEVEL_MAX] = {
@@ -200,6 +224,7 @@ static      const char * const      mandoclevels[MANDOCLEVEL_MAX] = {
        "SYSERR"
 };
 
        "SYSERR"
 };
 
+
 static void
 resize_buf(struct buf *buf, size_t initial)
 {
 static void
 resize_buf(struct buf *buf, size_t initial)
 {
@@ -232,33 +257,36 @@ pset(const char *buf, int pos, struct mparse *curp)
                        return;
        }
 
                        return;
        }
 
-       switch (curp->inttype) {
-       case (MPARSE_MDOC):
-               if (NULL == curp->pmdoc) 
-                       curp->pmdoc = mdoc_alloc(&curp->regs, curp);
+       if (MPARSE_MDOC & curp->options) {
+               if (NULL == curp->pmdoc)
+                       curp->pmdoc = mdoc_alloc(
+                           curp->roff, curp, curp->defos,
+                           MPARSE_QUICK & curp->options ? 1 : 0);
                assert(curp->pmdoc);
                curp->mdoc = curp->pmdoc;
                return;
                assert(curp->pmdoc);
                curp->mdoc = curp->pmdoc;
                return;
-       case (MPARSE_MAN):
-               if (NULL == curp->pman) 
-                       curp->pman = man_alloc(&curp->regs, curp);
+       } else if (MPARSE_MAN & curp->options) {
+               if (NULL == curp->pman)
+                       curp->pman = man_alloc(curp->roff, curp,
+                           MPARSE_QUICK & curp->options ? 1 : 0);
                assert(curp->pman);
                curp->man = curp->pman;
                return;
                assert(curp->pman);
                curp->man = curp->pman;
                return;
-       default:
-               break;
        }
 
        if (pos >= 3 && 0 == memcmp(buf, ".Dd", 3))  {
        }
 
        if (pos >= 3 && 0 == memcmp(buf, ".Dd", 3))  {
-               if (NULL == curp->pmdoc) 
-                       curp->pmdoc = mdoc_alloc(&curp->regs, curp);
+               if (NULL == curp->pmdoc)
+                       curp->pmdoc = mdoc_alloc(
+                           curp->roff, curp, curp->defos,
+                           MPARSE_QUICK & curp->options ? 1 : 0);
                assert(curp->pmdoc);
                curp->mdoc = curp->pmdoc;
                return;
                assert(curp->pmdoc);
                curp->mdoc = curp->pmdoc;
                return;
-       } 
+       }
 
 
-       if (NULL == curp->pman) 
-               curp->pman = man_alloc(&curp->regs, curp);
+       if (NULL == curp->pman)
+               curp->pman = man_alloc(curp->roff, curp,
+                   MPARSE_QUICK & curp->options ? 1 : 0);
        assert(curp->pman);
        curp->man = curp->pman;
 }
        assert(curp->pman);
        curp->man = curp->pman;
 }
@@ -281,8 +309,8 @@ mparse_buf_r(struct mparse *curp, struct buf blk, int start)
 
        memset(&ln, 0, sizeof(struct buf));
 
 
        memset(&ln, 0, sizeof(struct buf));
 
-       lnn = curp->line; 
-       pos = 0; 
+       lnn = curp->line;
+       pos = 0;
 
        for (i = 0; i < (int)blk.sz; ) {
                if (0 == pos && '\0' == blk.buf[i])
 
        for (i = 0; i < (int)blk.sz; ) {
                if (0 == pos && '\0' == blk.buf[i])
@@ -310,30 +338,38 @@ mparse_buf_r(struct mparse *curp, struct buf blk, int start)
                                break;
                        }
 
                                break;
                        }
 
-                       /* 
+                       /*
+                        * Make sure we have space for at least
+                        * one backslash and one other character
+                        * and the trailing NUL byte.
+                        */
+
+                       if (pos + 2 >= (int)ln.sz)
+                               resize_buf(&ln, 256);
+
+                       /*
                         * Warn about bogus characters.  If you're using
                         * non-ASCII encoding, you're screwing your
                         * readers.  Since I'd rather this not happen,
                         * Warn about bogus characters.  If you're using
                         * non-ASCII encoding, you're screwing your
                         * readers.  Since I'd rather this not happen,
-                        * I'll be helpful and drop these characters so
-                        * we don't display gibberish.  Note to manual
-                        * writers: use special characters.
+                        * I'll be helpful and replace these characters
+                        * with "?", so we don't display gibberish.
+                        * Note to manual writers: use special characters.
                         */
 
                        c = (unsigned char) blk.buf[i];
 
                         */
 
                        c = (unsigned char) blk.buf[i];
 
-                       if ( ! (isascii(c) && 
-                                       (isgraph(c) || isblank(c)))) {
+                       if ( ! (isascii(c) &&
+                           (isgraph(c) || isblank(c)))) {
                                mandoc_msg(MANDOCERR_BADCHAR, curp,
                                mandoc_msg(MANDOCERR_BADCHAR, curp,
-                                               curp->line, pos, "ignoring byte");
+                                   curp->line, pos, NULL);
                                i++;
                                i++;
+                               ln.buf[pos++] = '?';
                                continue;
                        }
 
                        /* Trailing backslash = a plain char. */
 
                        if ('\\' != blk.buf[i] || i + 1 == (int)blk.sz) {
                                continue;
                        }
 
                        /* Trailing backslash = a plain char. */
 
                        if ('\\' != blk.buf[i] || i + 1 == (int)blk.sz) {
-                               if (pos >= (int)ln.sz)
-                                       resize_buf(&ln, 256);
                                ln.buf[pos++] = blk.buf[i++];
                                continue;
                        }
                                ln.buf[pos++] = blk.buf[i++];
                                continue;
                        }
@@ -354,7 +390,7 @@ mparse_buf_r(struct mparse *curp, struct buf blk, int start)
                                continue;
                        }
 
                                continue;
                        }
 
-                       if ('"' == blk.buf[i + 1]) {
+                       if ('"' == blk.buf[i + 1] || '#' == blk.buf[i + 1]) {
                                i += 2;
                                /* Comment, skip to end of line */
                                for (; i < (int)blk.sz; ++i) {
                                i += 2;
                                /* Comment, skip to end of line */
                                for (; i < (int)blk.sz; ++i) {
@@ -375,16 +411,26 @@ mparse_buf_r(struct mparse *curp, struct buf blk, int start)
                                break;
                        }
 
                                break;
                        }
 
-                       /* Some other escape sequence, copy & cont. */
+                       /* Catch escaped bogus characters. */
 
 
-                       if (pos + 1 >= (int)ln.sz)
-                               resize_buf(&ln, 256);
+                       c = (unsigned char) blk.buf[i+1];
+
+                       if ( ! (isascii(c) &&
+                           (isgraph(c) || isblank(c)))) {
+                               mandoc_msg(MANDOCERR_BADCHAR, curp,
+                                   curp->line, pos, NULL);
+                               i += 2;
+                               ln.buf[pos++] = '?';
+                               continue;
+                       }
+
+                       /* Some other escape sequence, copy & cont. */
 
                        ln.buf[pos++] = blk.buf[i++];
                        ln.buf[pos++] = blk.buf[i++];
                }
 
 
                        ln.buf[pos++] = blk.buf[i++];
                        ln.buf[pos++] = blk.buf[i++];
                }
 
-               if (pos >= (int)ln.sz)
+               if (pos >= (int)ln.sz)
                        resize_buf(&ln, 256);
 
                ln.buf[pos] = '\0';
                        resize_buf(&ln, 256);
 
                ln.buf[pos] = '\0';
@@ -400,35 +446,71 @@ mparse_buf_r(struct mparse *curp, struct buf blk, int start)
 
                of = 0;
 
 
                of = 0;
 
+               /*
+                * Maintain a lookaside buffer of all parsed lines.  We
+                * only do this if mparse_keep() has been invoked (the
+                * buffer may be accessed with mparse_getkeep()).
+                */
+
+               if (curp->secondary) {
+                       curp->secondary->buf = mandoc_realloc(
+                           curp->secondary->buf,
+                           curp->secondary->sz + pos + 2);
+                       memcpy(curp->secondary->buf +
+                           curp->secondary->sz,
+                           ln.buf, pos);
+                       curp->secondary->sz += pos;
+                       curp->secondary->buf
+                               [curp->secondary->sz] = '\n';
+                       curp->secondary->sz++;
+                       curp->secondary->buf
+                               [curp->secondary->sz] = '\0';
+               }
 rerun:
 rerun:
-               rr = roff_parseln
-                       (curp->roff, curp->line, 
-                        &ln.buf, &ln.sz, of, &of);
+               rr = roff_parseln(curp->roff, curp->line,
+                   &ln.buf, &ln.sz, of, &of);
 
                switch (rr) {
 
                switch (rr) {
-               case (ROFF_REPARSE):
+               case ROFF_REPARSE:
                        if (REPARSE_LIMIT >= ++curp->reparse_count)
                                mparse_buf_r(curp, ln, 0);
                        else
                                mandoc_msg(MANDOCERR_ROFFLOOP, curp,
                        if (REPARSE_LIMIT >= ++curp->reparse_count)
                                mparse_buf_r(curp, ln, 0);
                        else
                                mandoc_msg(MANDOCERR_ROFFLOOP, curp,
-                                       curp->line, pos, NULL);
+                                   curp->line, pos, NULL);
                        pos = 0;
                        continue;
                        pos = 0;
                        continue;
-               case (ROFF_APPEND):
+               case ROFF_APPEND:
                        pos = (int)strlen(ln.buf);
                        continue;
                        pos = (int)strlen(ln.buf);
                        continue;
-               case (ROFF_RERUN):
+               case ROFF_RERUN:
                        goto rerun;
                        goto rerun;
-               case (ROFF_IGN):
+               case ROFF_IGN:
                        pos = 0;
                        continue;
                        pos = 0;
                        continue;
-               case (ROFF_ERR):
+               case ROFF_ERR:
                        assert(MANDOCLEVEL_FATAL <= curp->file_status);
                        break;
                        assert(MANDOCLEVEL_FATAL <= curp->file_status);
                        break;
-               case (ROFF_SO):
-                       mparse_readfd_r(curp, -1, ln.buf + of, 1);
-                       if (MANDOCLEVEL_FATAL <= curp->file_status)
+               case ROFF_SO:
+                       if (0 == (MPARSE_SO & curp->options) &&
+                           (i >= (int)blk.sz || '\0' == blk.buf[i])) {
+                               curp->sodest = mandoc_strdup(ln.buf + of);
+                               free(ln.buf);
+                               return;
+                       }
+                       /*
+                        * We remove `so' clauses from our lookaside
+                        * buffer because we're going to descend into
+                        * the file recursively.
+                        */
+                       if (curp->secondary)
+                               curp->secondary->sz -= pos + 1;
+                       mparse_readfd(curp, -1, ln.buf + of);
+                       if (MANDOCLEVEL_FATAL <= curp->file_status) {
+                               mandoc_vmsg(MANDOCERR_SO_FAIL,
+                                   curp, curp->line, pos,
+                                   ".so %s", ln.buf + of);
                                break;
                                break;
+                       }
                        pos = 0;
                        continue;
                default:
                        pos = 0;
                        continue;
                default:
@@ -445,7 +527,7 @@ rerun:
 
                /*
                 * If input parsers have not been allocated, do so now.
 
                /*
                 * If input parsers have not been allocated, do so now.
-                * We keep these instanced betwen parsers, but set them
+                * We keep these instanced between parsers, but set them
                 * locally per parse routine since we can use different
                 * parsers with each one.
                 */
                 * locally per parse routine since we can use different
                 * parsers with each one.
                 */
@@ -453,7 +535,7 @@ rerun:
                if ( ! (curp->man || curp->mdoc))
                        pset(ln.buf + of, pos - of, curp);
 
                if ( ! (curp->man || curp->mdoc))
                        pset(ln.buf + of, pos - of, curp);
 
-               /* 
+               /*
                 * Lastly, push down into the parsers themselves.  One
                 * of these will have already been set in the pset()
                 * routine.
                 * Lastly, push down into the parsers themselves.  One
                 * of these will have already been set in the pset()
                 * routine.
@@ -469,28 +551,29 @@ rerun:
                if (ROFF_TBL == rr)
                        while (NULL != (span = roff_span(curp->roff))) {
                                rc = curp->man ?
                if (ROFF_TBL == rr)
                        while (NULL != (span = roff_span(curp->roff))) {
                                rc = curp->man ?
-                                       man_addspan(curp->man, span) :
-                                       mdoc_addspan(curp->mdoc, span);
+                                   man_addspan(curp->man, span) :
+                                   mdoc_addspan(curp->mdoc, span);
                                if (0 == rc)
                                        break;
                        }
                else if (ROFF_EQN == rr)
                                if (0 == rc)
                                        break;
                        }
                else if (ROFF_EQN == rr)
-                       rc = curp->mdoc ? 
-                               mdoc_addeqn(curp->mdoc, 
-                                       roff_eqn(curp->roff)) :
-                               man_addeqn(curp->man,
-                                       roff_eqn(curp->roff));
+                       rc = curp->mdoc ?
+                           mdoc_addeqn(curp->mdoc,
+                               roff_eqn(curp->roff)) :
+                           man_addeqn(curp->man,
+                               roff_eqn(curp->roff));
                else if (curp->man || curp->mdoc)
                        rc = curp->man ?
                else if (curp->man || curp->mdoc)
                        rc = curp->man ?
-                               man_parseln(curp->man, 
-                                       curp->line, ln.buf, of) :
-                               mdoc_parseln(curp->mdoc, 
-                                       curp->line, ln.buf, of);
+                           man_parseln(curp->man,
+                               curp->line, ln.buf, of) :
+                           mdoc_parseln(curp->mdoc,
+                               curp->line, ln.buf, of);
 
                if (0 == rc) {
                        assert(MANDOCLEVEL_FATAL <= curp->file_status);
                        break;
 
                if (0 == rc) {
                        assert(MANDOCLEVEL_FATAL <= curp->file_status);
                        break;
-               }
+               } else if (2 == rc)
+                       break;
 
                /* Temporary buffers typically are not full. */
 
 
                /* Temporary buffers typically are not full. */
 
@@ -505,45 +588,20 @@ rerun:
        free(ln.buf);
 }
 
        free(ln.buf);
 }
 
-static void
-pdesc(struct mparse *curp, const char *file, int fd)
-{
-       struct buf       blk;
-       int              with_mmap;
-
-       /*
-        * Run for each opened file; may be called more than once for
-        * each full parse sequence if the opened file is nested (i.e.,
-        * from `so').  Simply sucks in the whole file and moves into
-        * the parse phase for the file.
-        */
-
-       if ( ! read_whole_file(file, fd, &blk, &with_mmap)) {
-               curp->file_status = MANDOCLEVEL_SYSERR;
-               return;
-       }
-
-       /* Line number is per-file. */
-
-       curp->line = 1;
-
-       mparse_buf_r(curp, blk, 1);
-
-       if (with_mmap)
-               munmap(blk.buf, blk.sz);
-       else
-               free(blk.buf);
-}
-
 static int
 static int
-read_whole_file(const char *file, int fd, struct buf *fb, int *with_mmap)
+read_whole_file(struct mparse *curp, const char *file, int fd,
+               struct buf *fb, int *with_mmap)
 {
 {
-       struct stat      st;
        size_t           off;
        ssize_t          ssz;
 
        size_t           off;
        ssize_t          ssz;
 
+#ifdef HAVE_MMAP
+       struct stat      st;
        if (-1 == fstat(fd, &st)) {
        if (-1 == fstat(fd, &st)) {
-               perror(file);
+               curp->file_status = MANDOCLEVEL_SYSERR;
+               if (curp->mmsg)
+                       (*curp->mmsg)(MANDOCERR_SYSSTAT, curp->file_status,
+                           file, 0, 0, strerror(errno));
                return(0);
        }
 
                return(0);
        }
 
@@ -556,16 +614,19 @@ read_whole_file(const char *file, int fd, struct buf *fb, int *with_mmap)
 
        if (S_ISREG(st.st_mode)) {
                if (st.st_size >= (1U << 31)) {
 
        if (S_ISREG(st.st_mode)) {
                if (st.st_size >= (1U << 31)) {
-                       fprintf(stderr, "%s: input too large\n", file);
+                       curp->file_status = MANDOCLEVEL_FATAL;
+                       if (curp->mmsg)
+                               (*curp->mmsg)(MANDOCERR_TOOLARGE,
+                                   curp->file_status, file, 0, 0, NULL);
                        return(0);
                }
                *with_mmap = 1;
                fb->sz = (size_t)st.st_size;
                        return(0);
                }
                *with_mmap = 1;
                fb->sz = (size_t)st.st_size;
-               fb->buf = mmap(NULL, fb->sz, PROT_READ, 
-                               MAP_FILE|MAP_SHARED, fd, 0);
+               fb->buf = mmap(NULL, fb->sz, PROT_READ, MAP_SHARED, fd, 0);
                if (fb->buf != MAP_FAILED)
                        return(1);
        }
                if (fb->buf != MAP_FAILED)
                        return(1);
        }
+#endif
 
        /*
         * If this isn't a regular file (like, say, stdin), then we must
 
        /*
         * If this isn't a regular file (like, say, stdin), then we must
@@ -579,7 +640,11 @@ read_whole_file(const char *file, int fd, struct buf *fb, int *with_mmap)
        for (;;) {
                if (off == fb->sz) {
                        if (fb->sz == (1U << 31)) {
        for (;;) {
                if (off == fb->sz) {
                        if (fb->sz == (1U << 31)) {
-                               fprintf(stderr, "%s: input too large\n", file);
+                               curp->file_status = MANDOCLEVEL_FATAL;
+                               if (curp->mmsg)
+                                       (*curp->mmsg)(MANDOCERR_TOOLARGE,
+                                           curp->file_status,
+                                           file, 0, 0, NULL);
                                break;
                        }
                        resize_buf(fb, 65536);
                                break;
                        }
                        resize_buf(fb, 65536);
@@ -590,7 +655,11 @@ read_whole_file(const char *file, int fd, struct buf *fb, int *with_mmap)
                        return(1);
                }
                if (ssz == -1) {
                        return(1);
                }
                if (ssz == -1) {
-                       perror(file);
+                       curp->file_status = MANDOCLEVEL_SYSERR;
+                       if (curp->mmsg)
+                               (*curp->mmsg)(MANDOCERR_SYSREAD,
+                                   curp->file_status, file, 0, 0,
+                                   strerror(errno));
                        break;
                }
                off += (size_t)ssz;
                        break;
                }
                off += (size_t)ssz;
@@ -618,8 +687,8 @@ mparse_end(struct mparse *curp)
                return;
        }
 
                return;
        }
 
-       if ( ! (curp->man || curp->mdoc)) {
-               mandoc_msg(MANDOCERR_NOTMANUAL, curp, 1, 0, NULL);
+       if ( ! (curp->mdoc || curp->man || curp->sodest)) {
+               mandoc_msg(MANDOCERR_NOTMANUAL, curp, 0, 0, NULL);
                curp->file_status = MANDOCLEVEL_FATAL;
                return;
        }
                curp->file_status = MANDOCLEVEL_FATAL;
                return;
        }
@@ -628,41 +697,86 @@ mparse_end(struct mparse *curp)
 }
 
 static void
 }
 
 static void
-mparse_readfd_r(struct mparse *curp, int fd, const char *file, int re)
+mparse_parse_buffer(struct mparse *curp, struct buf blk, const char *file)
 {
        const char      *svfile;
 {
        const char      *svfile;
+       static int       recursion_depth;
 
 
-       if (-1 == fd)
-               if (-1 == (fd = open(file, O_RDONLY, 0))) {
-                       perror(file);
-                       curp->file_status = MANDOCLEVEL_SYSERR;
-                       return;
-               }
+       if (64 < recursion_depth) {
+               mandoc_msg(MANDOCERR_ROFFLOOP, curp, curp->line, 0, NULL);
+               return;
+       }
 
 
+       /* Line number is per-file. */
        svfile = curp->file;
        curp->file = file;
        svfile = curp->file;
        curp->file = file;
+       curp->line = 1;
+       recursion_depth++;
 
 
-       pdesc(curp, file, fd);
+       mparse_buf_r(curp, blk, 1);
 
 
-       if (0 == re && MANDOCLEVEL_FATAL > curp->file_status)
+       if (0 == --recursion_depth && MANDOCLEVEL_FATAL > curp->file_status)
                mparse_end(curp);
 
                mparse_end(curp);
 
-       if (STDIN_FILENO != fd && -1 == close(fd))
-               perror(file);
-
        curp->file = svfile;
 }
 
        curp->file = svfile;
 }
 
+enum mandoclevel
+mparse_readmem(struct mparse *curp, const void *buf, size_t len,
+               const char *file)
+{
+       struct buf blk;
+
+       blk.buf = UNCONST(buf);
+       blk.sz = len;
+
+       mparse_parse_buffer(curp, blk, file);
+       return(curp->file_status);
+}
+
 enum mandoclevel
 mparse_readfd(struct mparse *curp, int fd, const char *file)
 {
 enum mandoclevel
 mparse_readfd(struct mparse *curp, int fd, const char *file)
 {
+       struct buf       blk;
+       int              with_mmap;
+
+       if (-1 == fd && -1 == (fd = open(file, O_RDONLY, 0))) {
+               curp->file_status = MANDOCLEVEL_SYSERR;
+               if (curp->mmsg)
+                       (*curp->mmsg)(MANDOCERR_SYSOPEN,
+                           curp->file_status,
+                           file, 0, 0, strerror(errno));
+               goto out;
+       }
+
+       /*
+        * Run for each opened file; may be called more than once for
+        * each full parse sequence if the opened file is nested (i.e.,
+        * from `so').  Simply sucks in the whole file and moves into
+        * the parse phase for the file.
+        */
+
+       if ( ! read_whole_file(curp, file, fd, &blk, &with_mmap))
+               goto out;
+
+       mparse_parse_buffer(curp, blk, file);
+
+#ifdef HAVE_MMAP
+       if (with_mmap)
+               munmap(blk.buf, blk.sz);
+       else
+#endif
+               free(blk.buf);
 
 
-       mparse_readfd_r(curp, fd, file, 0);
+       if (STDIN_FILENO != fd && -1 == close(fd))
+               perror(file);
+out:
        return(curp->file_status);
 }
 
 struct mparse *
        return(curp->file_status);
 }
 
 struct mparse *
-mparse_alloc(enum mparset inttype, enum mandoclevel wlevel, mandocmsg mmsg, void *arg)
+mparse_alloc(int options, enum mandoclevel wlevel,
+               mandocmsg mmsg, char *defos)
 {
        struct mparse   *curp;
 
 {
        struct mparse   *curp;
 
@@ -670,12 +784,12 @@ mparse_alloc(enum mparset inttype, enum mandoclevel wlevel, mandocmsg mmsg, void
 
        curp = mandoc_calloc(1, sizeof(struct mparse));
 
 
        curp = mandoc_calloc(1, sizeof(struct mparse));
 
+       curp->options = options;
        curp->wlevel = wlevel;
        curp->mmsg = mmsg;
        curp->wlevel = wlevel;
        curp->mmsg = mmsg;
-       curp->arg = arg;
-       curp->inttype = inttype;
+       curp->defos = defos;
 
 
-       curp->roff = roff_alloc(&curp->regs, curp);
+       curp->roff = roff_alloc(curp, options);
        return(curp);
 }
 
        return(curp);
 }
 
@@ -683,18 +797,21 @@ void
 mparse_reset(struct mparse *curp)
 {
 
 mparse_reset(struct mparse *curp)
 {
 
-       memset(&curp->regs, 0, sizeof(struct regset));
-
        roff_reset(curp->roff);
 
        if (curp->mdoc)
                mdoc_reset(curp->mdoc);
        if (curp->man)
                man_reset(curp->man);
        roff_reset(curp->roff);
 
        if (curp->mdoc)
                mdoc_reset(curp->mdoc);
        if (curp->man)
                man_reset(curp->man);
+       if (curp->secondary)
+               curp->secondary->sz = 0;
 
        curp->file_status = MANDOCLEVEL_OK;
        curp->mdoc = NULL;
        curp->man = NULL;
 
        curp->file_status = MANDOCLEVEL_OK;
        curp->mdoc = NULL;
        curp->man = NULL;
+
+       free(curp->sodest);
+       curp->sodest = NULL;
 }
 
 void
 }
 
 void
@@ -707,14 +824,24 @@ mparse_free(struct mparse *curp)
                man_free(curp->pman);
        if (curp->roff)
                roff_free(curp->roff);
                man_free(curp->pman);
        if (curp->roff)
                roff_free(curp->roff);
+       if (curp->secondary)
+               free(curp->secondary->buf);
 
 
+       free(curp->secondary);
+       free(curp->sodest);
        free(curp);
 }
 
 void
        free(curp);
 }
 
 void
-mparse_result(struct mparse *curp, struct mdoc **mdoc, struct man **man)
+mparse_result(struct mparse *curp,
+       struct mdoc **mdoc, struct man **man, char **sodest)
 {
 
 {
 
+       if (sodest && NULL != (*sodest = curp->sodest)) {
+               *mdoc = NULL;
+               *man = NULL;
+               return;
+       }
        if (mdoc)
                *mdoc = curp->mdoc;
        if (man)
        if (mdoc)
                *mdoc = curp->mdoc;
        if (man)
@@ -729,14 +856,14 @@ mandoc_vmsg(enum mandocerr t, struct mparse *m,
        va_list          ap;
 
        va_start(ap, fmt);
        va_list          ap;
 
        va_start(ap, fmt);
-       vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
+       (void)vsnprintf(buf, sizeof(buf), fmt, ap);
        va_end(ap);
 
        mandoc_msg(t, m, ln, pos, buf);
 }
 
 void
        va_end(ap);
 
        mandoc_msg(t, m, ln, pos, buf);
 }
 
 void
-mandoc_msg(enum mandocerr er, struct mparse *m, 
+mandoc_msg(enum mandocerr er, struct mparse *m,
                int ln, int col, const char *msg)
 {
        enum mandoclevel level;
                int ln, int col, const char *msg)
 {
        enum mandoclevel level;
@@ -767,3 +894,19 @@ mparse_strlevel(enum mandoclevel lvl)
 {
        return(mandoclevels[lvl]);
 }
 {
        return(mandoclevels[lvl]);
 }
+
+void
+mparse_keep(struct mparse *p)
+{
+
+       assert(NULL == p->secondary);
+       p->secondary = mandoc_calloc(1, sizeof(struct buf));
+}
+
+const char *
+mparse_getkeep(const struct mparse *p)
+{
+
+       assert(p->secondary);
+       return(p->secondary->sz ? p->secondary->buf : NULL);
+}
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