This patch hacks urlview-0.9 to add and document BROWSER support.
See the BROWSER page at http://www.tuxedo.org/~esr/BROWSER/ for discussion.

Diffs between last version checked in and current workfile(s):

--- README	2001/01/24 14:55:19	1.1
+++ README	2001/01/24 14:56:39
@@ -5,7 +5,8 @@
 
 `urlview' is a curses program for extracting URLs from text files and
 displaying a menu from which you can select a specific URL to view using
-your favorite browser program.
+your favorite browser program.  It respects the BROWSER convention
+(see <http://www.tuxedo.org/~esr/BROWSER/>)
 
 Requires: working regcomp() or GNU rx.
 
@@ -15,4 +16,6 @@
 Thomas Roessler <roessler@does-not-exist.org>
 July 4, 2000
 
+Eric S. Raymond <esr@thyrsus.com>
+Jan 24, 2001
 
--- sample.urlview	2001/01/24 14:55:41	1.1
+++ sample.urlview	2001/01/24 14:56:40
@@ -20,7 +20,8 @@
 REGEXP (((http|https|ftp|gopher)|mailto)[.:][^ >"\t]*|www\.[-a-z0-9.]+)[^ .,;\t>">\):]
 
 # Command to invoke for selected URL.  Use lynx, netscape, or url_handler.sh
-# shell script.
+# shell script.  Alternatively, you can leave COMMAND unset and set the BROWSER
+# environment variable instead.
 
 #COMMAND lynx %s
 #COMMAND netscape -remote 'openURL(%s)'
--- urlview.c	2001/01/24 14:53:41	1.1
+++ urlview.c	2001/01/24 15:20:40
@@ -174,6 +174,7 @@
   int optind = 1;
   int reopen_tty = 0;
   int is_filter = 0;
+  int noquote;
 
   int expert = 0;
   
@@ -181,7 +182,19 @@
     is_filter = 1;
 
   strncpy (regexp, DEFAULT_REGEXP, sizeof (regexp) - 1);
-  strncpy (command, DEFAULT_COMMAND, sizeof (command) - 1);
+
+  pc = getenv("BROWSER");
+  if (pc)
+  {
+      strncpy (command, pc, sizeof (command) - 1);
+      noquote = 1;
+  }
+  else
+  {
+      strncpy (command, DEFAULT_COMMAND, sizeof (command) - 1);
+      noquote = 0;
+  }
+  printf("Using %s\n", command);
 
   /*** read the initialization file ***/
 
@@ -503,16 +516,28 @@
 	mvaddstr (LINES - 1, 0, "URL: ");
 	if (mutt_enter_string (buf, sizeof (buf), LINES - 1, 5, 0) == 0 && buf[0])
 	{
+	  char *part;
+
 	  free (url[current]);
 	  url[current] = strdup (buf);
 	  endwin ();
-	  if (strstr (command, "%s"))
-	    snprintf (buf, sizeof (buf), command, quote (scratch, sizeof (scratch), url[current]));
-	  else
-	    snprintf (buf, sizeof (buf), "%s %s", command, quote (scratch, sizeof (scratch), url[current]));
-	  printf ("Executing: %s...\n", buf);
-	  fflush (stdout);
-	  system (buf);
+
+	  part = strtok(command, ":");
+	  do {
+	      if (noquote)
+		  strncpy (scratch, url[current], sizeof (scratch));
+	      else
+		  quote (scratch, sizeof (scratch), url[current]);
+	      if (strstr (part, "%s"))
+		  snprintf (buf, sizeof (buf), part, scratch);
+	      else
+		  snprintf (buf, sizeof (buf), "%s %s", part, scratch);
+	      printf ("Executing: %s...\n", buf);
+	      fflush (stdout);
+	      if (system (buf) == 0)
+		  break;
+	  } while
+	      (part = strtok(command, NULL));
 	}
 	move (LINES - 1, 0);
 	clrtoeol ();
--- urlview.man	2001/01/24 14:56:16	1.1
+++ urlview.man	2001/01/24 15:23:31
@@ -59,11 +59,19 @@
 .BR %s ,
 it will be subsituted
 with the URL that was requested, otherwise the URL is appended to
-the COMMAND string.  The default COMMAND is:
+the COMMAND string separated by a space.  The default COMMAND is:
 .br
 .sp
 url_handler.sh %s
 .PP
+Actually, \fIcommand\fP may consist of a colon-separated sequence of
+browser commands to be tried in order until one succeeds.  This may
+help you if you routinely share your
+.I ~/.urlview
+file across systems; it can also be useful for specifying both X and
+console-based browsers so that urlview will do the right thing
+whichever environment it is invoked in.
+.PP
 .B Note:
 You should 
 .I never
@@ -80,6 +88,13 @@
 system-wide urlview configuration file
 .IP "~/.urlview"
 urlview configuration file
+.SH ENVIRONMENT
+If the environment variable BROWSER exists and you have not specified
+COMMAND in your
+.IP "~/.urlview"
+file, the value of BROWSER is interpreted as though it were a COMMAND
+setting, except that urlview does not try to put quotes around %s
+substitutions.
 .SH SEE ALSO
 .PP
 .BR printf (3),

End of diffs.