Add an ability to run man(1) on local files (the argument should

contain a `/' character); based on the submission in the PR.

PR:		bin/120730
MFC after:	1 week

gnu/usr.bin/man/TODO

@@ -1,3 +1,5 @@
+$FreeBSD$
+
 Things that would be nice but aren't really necessary:
 
 0.  Update the documentation.
@@ -105,7 +107,7 @@ XX  I've been using your man(1) package for a while now and I ran into
     file names used by Motif.  Maybe there's a better way to handle
     this?
 
-15. Add ability to run man on a local file
+XX  Add ability to run man on a local file
 
 16. Handle per-tree tmac macros
     

gnu/usr.bin/man/lib/util.c

@@ -14,6 +14,8 @@
  * Austin, Texas  78712
  */
 
+/* $FreeBSD$ */
+
 #include <stdio.h>
 #include <string.h>
 #include <ctype.h>
@@ -119,6 +121,24 @@ is_directory (path)
 
 }
 
+/*
+ * Is path a regular file?
+ */
+int
+is_file (path)
+     char *path;
+{
+  struct stat sb;
+  register int status;
+
+  status = stat (path, &sb);
+
+  if (status != 0)
+    return -1;
+
+  return ((sb.st_mode & S_IFREG) == S_IFREG);
+}
+
 /*
  * Attempt a system () call.  Return 1 for success and 0 for failure
  * (handy for counting successes :-).

gnu/usr.bin/man/man/man.c

@@ -30,6 +30,7 @@ static const char rcsid[] =
 #ifdef __FreeBSD__
 #include <locale.h>
 #include <langinfo.h>
+#include <libgen.h>
 #endif
 #include <stdio.h>
 #include <string.h>
@@ -70,6 +71,7 @@ extern char *sprintf ();
 extern char **glob_filename ();
 extern int is_newer ();
 extern int is_directory ();
+extern int is_file ();
 extern int do_system_command ();
 
 char *prognam;
@@ -87,6 +89,7 @@ static int apropos;
 static int whatis;
 static int findall;
 static int print_where;
+static char *ultimate_source ();
 
 #ifdef __FreeBSD__
 static char *locale, *locale_opts, *locale_nroff, *locale_codeset;
@@ -201,6 +204,11 @@ main (argc, argv)
 	do_whatis (nextarg);
 	status = (status ? 0 : 1); /* reverts status, see below */
       }
+      else if (strchr (nextarg, '/') != NULL && is_file (nextarg) == 1)
+	{
+	  format_and_display (NULL, ultimate_source(nextarg, dirname(nextarg)),
+			      NULL);
+	}
       else
 	{
 	  status = man (nextarg);
@@ -1409,13 +1417,15 @@ format_and_display (path, man_file, cat_file)
   if (access (man_file, R_OK) != 0)
     return 0;
 
-  if (troff)
+  if (troff || path == NULL)
     {
       roff_command = make_roff_command (man_file);
       if (roff_command == NULL)
 	return 0;
-      else
+      if (troff)
 	snprintf (command, sizeof(command), "(cd %s ; %s)", path, roff_command);
+      else
+	snprintf (command, sizeof(command), "%s | %s", roff_command, pager);
 
       found = do_system_command (command);
     }