Improve messages related to the roff(7) .so request.

[mandoc.git] / man_validate.c

diff --git a/man_validate.c b/man_validate.c
index 484694956c42572e9282aa17fc97165761a0145c..8e7868425fe605123fe1c42f670980b3937a2890 100644 (file)
--- a/man_validate.c
+++ b/man_validate.c
@@ -1,6 +1,7 @@
-/*     $Id: man_validate.c,v 1.45 2010/06/28 14:39:17 kristaps Exp $ */
+/*     $Id: man_validate.c,v 1.93 2014/06/20 23:02:31 schwarze Exp $ */

 /*
 /*

- * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2010, 2012, 2013, 2014 Ingo Schwarze <schwarze@openbsd.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


@@ -26,12 +27,16 @@
 #include <limits.h>
 #include <stdarg.h>
 #include <stdlib.h>
 #include <limits.h>
 #include <stdarg.h>
 #include <stdlib.h>

+#include <string.h>
+#include <time.h>

 
 

+#include "man.h"

 #include "mandoc.h"
 #include "mandoc.h"

+#include "mandoc_aux.h"

 #include "libman.h"
 #include "libmandoc.h"
 
 #include "libman.h"
 #include "libmandoc.h"
 

-#define        CHKARGS   struct man *m, struct man_node *n
+#define        CHKARGS   struct man *man, struct man_node *n

 
 typedef        int     (*v_check)(CHKARGS);
 
 
 typedef        int     (*v_check)(CHKARGS);
 


@@ -40,37 +45,57 @@ struct      man_valid {
        v_check  *posts;
 };
 
        v_check  *posts;
 };
 

-static int       check_bline(CHKARGS);

 static int       check_eq0(CHKARGS);
 static int       check_eq0(CHKARGS);

+static int       check_eq2(CHKARGS);

 static int       check_le1(CHKARGS);
 static int       check_ge2(CHKARGS);
 static int       check_le5(CHKARGS);
 static int       check_le1(CHKARGS);
 static int       check_ge2(CHKARGS);
 static int       check_le5(CHKARGS);

+static int       check_head1(CHKARGS);

 static int       check_par(CHKARGS);
 static int       check_part(CHKARGS);
 static int       check_root(CHKARGS);
 static int       check_par(CHKARGS);
 static int       check_part(CHKARGS);
 static int       check_root(CHKARGS);

-static int       check_sec(CHKARGS);
-static int       check_text(CHKARGS);
-static int       check_title(CHKARGS);
-
+static void      check_text(CHKARGS);
+
+static int       post_AT(CHKARGS);
+static int       post_IP(CHKARGS);
+static int       post_vs(CHKARGS);
+static int       post_fi(CHKARGS);
+static int       post_ft(CHKARGS);
+static int       post_nf(CHKARGS);
+static int       post_sec(CHKARGS);
+static int       post_TH(CHKARGS);
+static int       post_UC(CHKARGS);
+static int       pre_sec(CHKARGS);
+
+static v_check   posts_at[] = { post_AT, NULL };
+static v_check   posts_br[] = { post_vs, check_eq0, NULL };

 static v_check   posts_eq0[] = { check_eq0, NULL };
 static v_check   posts_eq0[] = { check_eq0, NULL };

-static v_check   posts_th[] = { check_ge2, check_le5, check_title, NULL };
+static v_check   posts_eq2[] = { check_eq2, NULL };
+static v_check   posts_fi[] = { check_eq0, post_fi, NULL };
+static v_check   posts_ft[] = { post_ft, NULL };
+static v_check   posts_ip[] = { post_IP, NULL };
+static v_check   posts_le1[] = { check_le1, NULL };
+static v_check   posts_nf[] = { check_eq0, post_nf, NULL };

 static v_check   posts_par[] = { check_par, NULL };
 static v_check   posts_part[] = { check_part, NULL };
 static v_check   posts_par[] = { check_par, NULL };
 static v_check   posts_part[] = { check_part, NULL };

-static v_check   posts_sec[] = { check_sec, NULL };
-static v_check   posts_le1[] = { check_le1, NULL };
-static v_check   pres_bline[] = { check_bline, NULL };
+static v_check   posts_sec[] = { post_sec, NULL };
+static v_check   posts_sp[] = { post_vs, check_le1, NULL };
+static v_check   posts_th[] = { check_ge2, check_le5, post_TH, NULL };
+static v_check   posts_uc[] = { post_UC, NULL };
+static v_check   posts_ur[] = { check_head1, check_part, NULL };
+static v_check   pres_sec[] = { pre_sec, NULL };

 
 static const struct man_valid man_valids[MAN_MAX] = {
 
 static const struct man_valid man_valids[MAN_MAX] = {

-       { NULL, posts_eq0 }, /* br */
-       { pres_bline, posts_th }, /* TH */
-       { pres_bline, posts_sec }, /* SH */
-       { pres_bline, posts_sec }, /* SS */
-       { pres_bline, posts_par }, /* TP */
-       { pres_bline, posts_par }, /* LP */
-       { pres_bline, posts_par }, /* PP */
-       { pres_bline, posts_par }, /* P */
-       { pres_bline, posts_par }, /* IP */
-       { pres_bline, posts_par }, /* HP */
+       { NULL, posts_br }, /* br */
+       { NULL, posts_th }, /* TH */
+       { pres_sec, posts_sec }, /* SH */
+       { pres_sec, posts_sec }, /* SS */
+       { NULL, NULL }, /* TP */
+       { NULL, posts_par }, /* LP */
+       { NULL, posts_par }, /* PP */
+       { NULL, posts_par }, /* P */
+       { NULL, posts_ip }, /* IP */
+       { NULL, NULL }, /* HP */

        { NULL, NULL }, /* SM */
        { NULL, NULL }, /* SB */
        { NULL, NULL }, /* BI */
        { NULL, NULL }, /* SM */
        { NULL, NULL }, /* SB */
        { NULL, NULL }, /* BI */


@@ -83,251 +108,486 @@ static   const struct man_valid man_valids[MAN_MAX] = {
        { NULL, NULL }, /* IR */
        { NULL, NULL }, /* RI */
        { NULL, posts_eq0 }, /* na */
        { NULL, NULL }, /* IR */
        { NULL, NULL }, /* RI */
        { NULL, posts_eq0 }, /* na */

-       { NULL, NULL }, /* i */
-       { NULL, posts_le1 }, /* sp */
-       { pres_bline, posts_eq0 }, /* nf */
-       { pres_bline, posts_eq0 }, /* fi */
-       { NULL, NULL }, /* r */
+       { NULL, posts_sp }, /* sp */
+       { NULL, posts_nf }, /* nf */
+       { NULL, posts_fi }, /* fi */

        { NULL, NULL }, /* RE */
        { NULL, posts_part }, /* RS */
        { NULL, NULL }, /* DT */
        { NULL, NULL }, /* RE */
        { NULL, posts_part }, /* RS */
        { NULL, NULL }, /* DT */

-       { NULL, NULL }, /* UC */
-       { NULL, NULL }, /* PD */
-       { NULL, posts_le1 }, /* Sp */
-       { pres_bline, posts_le1 }, /* Vb */
-       { pres_bline, posts_eq0 }, /* Ve */
-       { NULL, NULL }, /* AT */
+       { NULL, posts_uc }, /* UC */
+       { NULL, posts_le1 }, /* PD */
+       { NULL, posts_at }, /* AT */
+       { NULL, NULL }, /* in */
+       { NULL, posts_ft }, /* ft */
+       { NULL, posts_eq2 }, /* OP */
+       { NULL, posts_nf }, /* EX */
+       { NULL, posts_fi }, /* EE */
+       { NULL, posts_ur }, /* UR */
+       { NULL, NULL }, /* UE */
+       { NULL, NULL }, /* ll */

 };
 
 
 int
 };
 
 
 int

-man_valid_pre(struct man *m, struct man_node *n)
+man_valid_pre(struct man *man, struct man_node *n)

 {
        v_check         *cp;
 
 {
        v_check         *cp;
 

-       if (MAN_TEXT == n->type)
-               return(1);
-       if (MAN_ROOT == n->type)
+       switch (n->type) {
+       case MAN_TEXT:
+               /* FALLTHROUGH */
+       case MAN_ROOT:
+               /* FALLTHROUGH */
+       case MAN_EQN:
+               /* FALLTHROUGH */
+       case MAN_TBL:

                return(1);
                return(1);

+       default:
+               break;
+       }

 
        if (NULL == (cp = man_valids[n->tok].pres))
                return(1);
        for ( ; *cp; cp++)
 
        if (NULL == (cp = man_valids[n->tok].pres))
                return(1);
        for ( ; *cp; cp++)

-               if ( ! (*cp)(m, n)) 
+               if ( ! (*cp)(man, n))

                        return(0);
        return(1);
 }
 
                        return(0);
        return(1);
 }
 

-

 int
 int

-man_valid_post(struct man *m)
+man_valid_post(struct man *man)

 {
        v_check         *cp;
 
 {
        v_check         *cp;
 

-       if (MAN_VALID & m->last->flags)
+       if (MAN_VALID & man->last->flags)

                return(1);
                return(1);

-       m->last->flags |= MAN_VALID;
+       man->last->flags |= MAN_VALID;

 
 

-       switch (m->last->type) {
-       case (MAN_TEXT): 
-               return(check_text(m, m->last));
-       case (MAN_ROOT):
-               return(check_root(m, m->last));
+       switch (man->last->type) {
+       case MAN_TEXT:
+               check_text(man, man->last);
+               return(1);
+       case MAN_ROOT:
+               return(check_root(man, man->last));
+       case MAN_EQN:
+               /* FALLTHROUGH */
+       case MAN_TBL:
+               return(1);

        default:
                break;
        }
 
        default:
                break;
        }
 

-       if (NULL == (cp = man_valids[m->last->tok].posts))
+       if (NULL == (cp = man_valids[man->last->tok].posts))

                return(1);
        for ( ; *cp; cp++)
                return(1);
        for ( ; *cp; cp++)

-               if ( ! (*cp)(m, m->last))
+               if ( ! (*cp)(man, man->last))

                        return(0);
 
        return(1);
 }
 
                        return(0);
 
        return(1);
 }
 

-

 static int
 static int

-check_root(CHKARGS) 
+check_root(CHKARGS)

 {
 
 {
 

-       if (MAN_BLINE & m->flags)
-               return(man_nmsg(m, n, MANDOCERR_SCOPEEXIT));
-       if (MAN_ELINE & m->flags)
-               return(man_nmsg(m, n, MANDOCERR_SCOPEEXIT));
+       if (MAN_BLINE & man->flags)
+               man_nmsg(man, n, MANDOCERR_SCOPEEXIT);
+       else if (MAN_ELINE & man->flags)
+               man_nmsg(man, n, MANDOCERR_SCOPEEXIT);

 
 

-       m->flags &= ~MAN_BLINE;
-       m->flags &= ~MAN_ELINE;
+       man->flags &= ~MAN_BLINE;
+       man->flags &= ~MAN_ELINE;
+
+       if (NULL == man->first->child)
+               man_nmsg(man, n, MANDOCERR_DOC_EMPTY);
+       else
+               man->meta.hasbody = 1;
+
+       if (NULL == man->meta.title) {
+               man_nmsg(man, n, MANDOCERR_TH_MISSING);

 
 

-       if (NULL == m->first->child) {
-               man_nmsg(m, n, MANDOCERR_NODOCBODY);
-               return(0);
-       } else if (NULL == m->meta.title) {
-               if ( ! man_nmsg(m, n, MANDOCERR_NOTITLE))
-                       return(0);

                /*
                 * If a title hasn't been set, do so now (by
                 * implication, date and section also aren't set).
                /*
                 * If a title hasn't been set, do so now (by
                 * implication, date and section also aren't set).

-                * 
-                * FIXME: this should be in man_action.c.

                 */
                 */

-               m->meta.title = mandoc_strdup("unknown");
-               m->meta.date = time(NULL);
-               m->meta.msec = mandoc_strdup("1");
-       }
-
-       return(1);
-}
-

 
 

-static int
-check_title(CHKARGS) 
-{
-       const char      *p;
-
-       assert(n->child);
-       /* FIXME: is this sufficient? */
-       if ('\0' == *n->child->string) {
-               man_nmsg(m, n, MANDOCERR_SYNTARGCOUNT);
-               return(0);
+               man->meta.title = mandoc_strdup("unknown");
+               man->meta.msec = mandoc_strdup("1");
+               man->meta.date = man->quick ? mandoc_strdup("") :
+                   mandoc_normdate(man->parse, NULL, n->line, n->pos);

        }
 
        }
 

-       for (p = n->child->string; '\0' != *p; p++)
-               if (isalpha((u_char)*p) && ! isupper((u_char)*p))
-                       if ( ! man_nmsg(m, n, MANDOCERR_UPPERCASE))
-                               return(0);
-

        return(1);
 }
 
        return(1);
 }
 

-
-static int
-check_text(CHKARGS) 
+static void
+check_text(CHKARGS)

 {
 {

-       char            *p;
-       int              pos, c;
-
-       assert(n->string);
-
-       for (p = n->string, pos = n->pos + 1; *p; p++, pos++) {
-               if ('\\' == *p) {
-                       c = mandoc_special(p);
-                       if (c) {
-                               p += c - 1;
-                               pos += c - 1;
-                               continue;
-                       }
-
-                       c = man_pmsg(m, n->line, pos, MANDOCERR_BADESCAPE);
-                       if ( ! (MAN_IGN_ESCAPE & m->pflags) && ! c)
-                               return(c);
-               }
-
-               /* 
-                * FIXME: we absolutely cannot let \b get through or it
-                * will destroy some assumptions in terms of format.
-                */
+       char            *cp, *p;

 
 

-               if ('\t' == *p || isprint((u_char)*p) || ASCII_HYPH == *p) 
-                       continue;
-               if ( ! man_pmsg(m, n->line, pos, MANDOCERR_BADCHAR))
-                       return(0);
-       }
+       if (MAN_LITERAL & man->flags)
+               return;

 
 

-       return(1);
+       cp = n->string;
+       for (p = cp; NULL != (p = strchr(p, '\t')); p++)
+               man_pmsg(man, n->line, (int)(p - cp), MANDOCERR_BADTAB);

 }
 
 }
 

-

 #define        INEQ_DEFINE(x, ineq, name) \
 static int \
 check_##name(CHKARGS) \
 { \
        if (n->nchild ineq (x)) \
                return(1); \
 #define        INEQ_DEFINE(x, ineq, name) \
 static int \
 check_##name(CHKARGS) \
 { \
        if (n->nchild ineq (x)) \
                return(1); \

-       man_vmsg(m, MANDOCERR_SYNTARGCOUNT, n->line, n->pos, \
-                       "line arguments %s %d (have %d)", \
-                       #ineq, (x), n->nchild); \
-       return(0); \
+       mandoc_vmsg(MANDOCERR_ARGCOUNT, man->parse, n->line, n->pos, \
+           "line arguments %s %d (have %d)", \
+           #ineq, (x), n->nchild); \
+       return(1); \

 }
 
 INEQ_DEFINE(0, ==, eq0)
 }
 
 INEQ_DEFINE(0, ==, eq0)

+INEQ_DEFINE(2, ==, eq2)

 INEQ_DEFINE(1, <=, le1)
 INEQ_DEFINE(2, >=, ge2)
 INEQ_DEFINE(5, <=, le5)
 
 INEQ_DEFINE(1, <=, le1)
 INEQ_DEFINE(2, >=, ge2)
 INEQ_DEFINE(5, <=, le5)
 

+static int
+check_head1(CHKARGS)
+{
+
+       if (MAN_HEAD == n->type && 1 != n->nchild)
+               mandoc_vmsg(MANDOCERR_ARGCOUNT, man->parse, n->line,
+                   n->pos, "line arguments eq 1 (have %d)", n->nchild);
+
+       return(1);
+}

 
 static int
 
 static int

-check_sec(CHKARGS)
+post_ft(CHKARGS)

 {
 {

+       char    *cp;
+       int      ok;
+
+       if (0 == n->nchild)
+               return(1);
+
+       ok = 0;
+       cp = n->child->string;
+       switch (*cp) {
+       case '1':
+               /* FALLTHROUGH */
+       case '2':
+               /* FALLTHROUGH */
+       case '3':
+               /* FALLTHROUGH */
+       case '4':
+               /* FALLTHROUGH */
+       case 'I':
+               /* FALLTHROUGH */
+       case 'P':
+               /* FALLTHROUGH */
+       case 'R':
+               if ('\0' == cp[1])
+                       ok = 1;
+               break;
+       case 'B':
+               if ('\0' == cp[1] || ('I' == cp[1] && '\0' == cp[2]))
+                       ok = 1;
+               break;
+       case 'C':
+               if ('W' == cp[1] && '\0' == cp[2])
+                       ok = 1;
+               break;
+       default:
+               break;
+       }
+
+       if (0 == ok) {
+               mandoc_vmsg(MANDOCERR_BADFONT, man->parse, n->line,
+                   n->pos, "%s", cp);
+               *cp = '\0';
+       }

 
 

-       if (MAN_HEAD == n->type && 0 == n->nchild) {
-               man_nmsg(m, n, MANDOCERR_SYNTARGCOUNT);
-               return(0);
-       } else if (MAN_BODY == n->type && 0 == n->nchild)
-               return(man_nmsg(m, n, MANDOCERR_NOBODY));
+       if (1 < n->nchild)
+               mandoc_vmsg(MANDOCERR_ARGCOUNT, man->parse, n->line,
+                   n->pos, "want one child (have %d)", n->nchild);

 
        return(1);
 }
 
 
        return(1);
 }
 

+static int
+pre_sec(CHKARGS)
+{
+
+       if (MAN_BLOCK == n->type)
+               man->flags &= ~MAN_LITERAL;
+       return(1);
+}
+
+static int
+post_sec(CHKARGS)
+{
+
+       if ( ! (MAN_HEAD == n->type && 0 == n->nchild))
+               return(1);
+
+       man_nmsg(man, n, MANDOCERR_SYNTARGCOUNT);
+       return(0);
+}

 
 static int
 check_part(CHKARGS)
 {
 
        if (MAN_BODY == n->type && 0 == n->nchild)
 
 static int
 check_part(CHKARGS)
 {
 
        if (MAN_BODY == n->type && 0 == n->nchild)

-               return(man_nmsg(m, n, MANDOCERR_NOBODY));
+               mandoc_msg(MANDOCERR_ARGCWARN, man->parse, n->line,
+                   n->pos, "want children (have none)");
+

        return(1);
 }
 
        return(1);
 }
 

-

 static int
 check_par(CHKARGS)
 {
 
 static int
 check_par(CHKARGS)
 {
 

-       if (MAN_BODY == n->type) 
-               switch (n->tok) {
-               case (MAN_IP):
-                       /* FALLTHROUGH */
-               case (MAN_HP):
-                       /* FALLTHROUGH */
-               case (MAN_TP):
-                       /* Body-less lists are ok. */
-                       break;
-               default:
-                       if (n->nchild)
-                               break;
-                       return(man_nmsg(m, n, MANDOCERR_NOBODY));
-               }
-       if (MAN_HEAD == n->type)
-               switch (n->tok) {
-               case (MAN_PP):
-                       /* FALLTHROUGH */
-               case (MAN_P):
-                       /* FALLTHROUGH */
-               case (MAN_LP):
-                       if (0 == n->nchild)
-                               break;
-                       return(man_nmsg(m, n, MANDOCERR_ARGSLOST));
-               default:
-                       if (n->nchild)
+       switch (n->type) {
+       case MAN_BLOCK:
+               if (0 == n->body->nchild)
+                       man_node_delete(man, n);
+               break;
+       case MAN_BODY:
+               if (0 == n->nchild)
+                       man_nmsg(man, n, MANDOCERR_IGNPAR);
+               break;
+       case MAN_HEAD:
+               if (n->nchild)
+                       man_nmsg(man, n, MANDOCERR_ARGSLOST);
+               break;
+       default:
+               break;
+       }
+
+       return(1);
+}
+
+static int
+post_IP(CHKARGS)
+{
+
+       switch (n->type) {
+       case MAN_BLOCK:
+               if (0 == n->head->nchild && 0 == n->body->nchild)
+                       man_node_delete(man, n);
+               break;
+       case MAN_BODY:
+               if (0 == n->parent->head->nchild && 0 == n->nchild)
+                       man_nmsg(man, n, MANDOCERR_IGNPAR);
+               break;
+       default:
+               break;
+       }
+       return(1);
+}
+
+static int
+post_TH(CHKARGS)
+{
+       struct man_node *nb;
+       const char      *p;
+
+       free(man->meta.title);
+       free(man->meta.vol);
+       free(man->meta.source);
+       free(man->meta.msec);
+       free(man->meta.date);
+
+       man->meta.title = man->meta.vol = man->meta.date =
+           man->meta.msec = man->meta.source = NULL;
+
+       nb = n;
+
+       /* ->TITLE<- MSEC DATE SOURCE VOL */
+
+       n = n->child;
+       if (n && n->string) {
+               for (p = n->string; '\0' != *p; p++) {
+                       /* Only warn about this once... */
+                       if (isalpha((unsigned char)*p) &&
+                           ! isupper((unsigned char)*p)) {
+                               man_nmsg(man, n, MANDOCERR_TITLE_CASE);

                                break;
                                break;

-                       return(man_nmsg(m, n, MANDOCERR_NOARGS));
+                       }

                }
                }

+               man->meta.title = mandoc_strdup(n->string);
+       } else
+               man->meta.title = mandoc_strdup("");
+
+       /* TITLE ->MSEC<- DATE SOURCE VOL */
+
+       if (n)
+               n = n->next;
+       if (n && n->string)
+               man->meta.msec = mandoc_strdup(n->string);
+       else
+               man->meta.msec = mandoc_strdup("");
+
+       /* TITLE MSEC ->DATE<- SOURCE VOL */
+
+       if (n)
+               n = n->next;
+       if (n && n->string && '\0' != n->string[0]) {
+               man->meta.date = man->quick ?
+                   mandoc_strdup(n->string) :
+                   mandoc_normdate(man->parse, n->string,
+                       n->line, n->pos);
+       } else {
+               man->meta.date = mandoc_strdup("");
+               man_nmsg(man, n ? n : nb, MANDOCERR_DATE_MISSING);
+       }
+
+       /* TITLE MSEC DATE ->SOURCE<- VOL */
+
+       if (n && (n = n->next))
+               man->meta.source = mandoc_strdup(n->string);
+
+       /* TITLE MSEC DATE SOURCE ->VOL<- */
+       /* If missing, use the default VOL name for MSEC. */

 
 

+       if (n && (n = n->next))
+               man->meta.vol = mandoc_strdup(n->string);
+       else if ('\0' != man->meta.msec[0] &&
+           (NULL != (p = mandoc_a2msec(man->meta.msec))))
+               man->meta.vol = mandoc_strdup(p);
+
+       /*
+        * Remove the `TH' node after we've processed it for our
+        * meta-data.
+        */
+       man_node_delete(man, man->last);

        return(1);
 }
 
        return(1);
 }
 

+static int
+post_nf(CHKARGS)
+{
+
+       if (MAN_LITERAL & man->flags)
+               man_nmsg(man, n, MANDOCERR_SCOPEREP);
+
+       man->flags |= MAN_LITERAL;
+       return(1);
+}

 
 static int
 
 static int

-check_bline(CHKARGS)
+post_fi(CHKARGS)

 {
 
 {
 

-       assert( ! (MAN_ELINE & m->flags));
-       if (MAN_BLINE & m->flags) {
-               man_nmsg(m, n, MANDOCERR_SYNTLINESCOPE);
-               return(0);
+       if ( ! (MAN_LITERAL & man->flags))
+               man_nmsg(man, n, MANDOCERR_WNOSCOPE);
+
+       man->flags &= ~MAN_LITERAL;
+       return(1);
+}
+
+static int
+post_UC(CHKARGS)
+{
+       static const char * const bsd_versions[] = {
+           "3rd Berkeley Distribution",
+           "4th Berkeley Distribution",
+           "4.2 Berkeley Distribution",
+           "4.3 Berkeley Distribution",
+           "4.4 Berkeley Distribution",
+       };
+
+       const char      *p, *s;
+
+       n = n->child;
+
+       if (NULL == n || MAN_TEXT != n->type)
+               p = bsd_versions[0];
+       else {
+               s = n->string;
+               if (0 == strcmp(s, "3"))
+                       p = bsd_versions[0];
+               else if (0 == strcmp(s, "4"))
+                       p = bsd_versions[1];
+               else if (0 == strcmp(s, "5"))
+                       p = bsd_versions[2];
+               else if (0 == strcmp(s, "6"))
+                       p = bsd_versions[3];
+               else if (0 == strcmp(s, "7"))
+                       p = bsd_versions[4];
+               else
+                       p = bsd_versions[0];
+       }
+
+       free(man->meta.source);
+       man->meta.source = mandoc_strdup(p);
+       return(1);
+}
+
+static int
+post_AT(CHKARGS)
+{
+       static const char * const unix_versions[] = {
+           "7th Edition",
+           "System III",
+           "System V",
+           "System V Release 2",
+       };
+
+       const char      *p, *s;
+       struct man_node *nn;
+
+       n = n->child;
+
+       if (NULL == n || MAN_TEXT != n->type)
+               p = unix_versions[0];
+       else {
+               s = n->string;
+               if (0 == strcmp(s, "3"))
+                       p = unix_versions[0];
+               else if (0 == strcmp(s, "4"))
+                       p = unix_versions[1];
+               else if (0 == strcmp(s, "5")) {
+                       nn = n->next;
+                       if (nn && MAN_TEXT == nn->type && nn->string[0])
+                               p = unix_versions[3];
+                       else
+                               p = unix_versions[2];
+               } else
+                       p = unix_versions[0];

        }
 
        }
 

+       free(man->meta.source);
+       man->meta.source = mandoc_strdup(p);

        return(1);
 }
 
        return(1);
 }
 

+static int
+post_vs(CHKARGS)
+{
+
+       if (NULL != n->prev)
+               return(1);
+
+       switch (n->parent->tok) {
+       case MAN_SH:
+               /* FALLTHROUGH */
+       case MAN_SS:
+               man_nmsg(man, n, MANDOCERR_IGNPAR);
+               /* FALLTHROUGH */
+       case MAN_MAX:
+               /*
+                * Don't warn about this because it occurs in pod2man
+                * and would cause considerable (unfixable) warnage.
+                */
+               man_node_delete(man, n);
+               break;
+       default:
+               break;
+       }
+
+       return(1);
+}