From 804beb9266f9f731329d90b56842a863598f25ff Mon Sep 17 00:00:00 2001
From: Tiago Cunha <tcunha@gmx.com>
Date: Sun, 1 Feb 2009 18:14:49 +0000
Subject: [PATCH] Support commands with right parenthesis. From nicm and me.

---
 CHANGES  |  6 +++++-
 FAQ      | 15 +++++++++++++++
 status.c | 39 ++++++++++++++++++++++++++++++---------
 3 files changed, 50 insertions(+), 10 deletions(-)

diff --git a/CHANGES b/CHANGES
index 7a095b18..b512af76 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+01 February 2009
+
+* The character pair #(command) may now contain (escaped) right parenthesis.
+
 30 January 2009
 
 * . now bound to "command-prompt 'move-window %%'" by default, from joshe.
@@ -1070,7 +1074,7 @@
   (including mutt, emacs). No status bar yet and no key remapping or other
   customisation.
 
-$Id: CHANGES,v 1.245 2009-01-30 21:10:10 nicm Exp $
+$Id: CHANGES,v 1.246 2009-02-01 18:14:49 tcunha Exp $
 
  LocalWords:  showw utf UTF fulvio ciriaco joshe OSC APC gettime abc DEF OA clr
  LocalWords:  rivo nurges lscm Erdely eol smysession mysession ek dstname RB ms
diff --git a/FAQ b/FAQ
index f7d02b99..8bdc0ed3 100644
--- a/FAQ
+++ b/FAQ
@@ -164,3 +164,18 @@ exit (elinks, for some strange reason, sets it to the value of TERM):
         	STY= `which elinks` $*
 	        echo -ne \\033]0\;\\007;
 	}
+
+* What's the proper way to escape characters with #(command)?
+
+When using the character pair #(command), the command will be parsed twice.
+First when it's read by the configuration file, or the command-prompt parser,
+and another right before the command is passed to the shell by popen(3). As an
+example, to echo the string (test) to the status line, one could use single,
+or double-quotes (the meaning is the same as if in the shell):
+
+	set -g status-right "#(echo \\\\(test\\\\))"
+	set -g status-right '#(echo \\\(test\\\))'
+
+With the double-quotes, the string when is first parsed will be set to
+#(echo \\(test\\)), and then again parsed as echo \(test\) before passing the
+command to sh -c.
diff --git a/status.c b/status.c
index 7850cfd6..47299388 100644
--- a/status.c
+++ b/status.c
@@ -1,4 +1,4 @@
-/* $Id: status.c,v 1.70 2009-01-30 00:24:49 nicm Exp $ */
+/* $Id: status.c,v 1.71 2009-02-01 18:14:49 tcunha Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -376,16 +376,37 @@ char *
 status_replace_popen(char **iptr)
 {
 	FILE	*f;
-	char	*buf		= NULL;
-	char	cmd[BUFSIZ];
-	char	*ptr		= NULL;
+	char	*buf, *cmd, *ptr;
+	int	lastesc;
 	size_t	len;
 
-	if (**iptr == '\0' || strchr(*iptr, ')') == NULL)
+	if (**iptr == '\0')
 		return (NULL);
+	if (**iptr == ')') {		/* no command given */
+		(*iptr)++;
+		return (NULL);
+	}
 
-	strlcpy(cmd, *iptr, sizeof cmd);
-	cmd[strcspn(cmd, ")")] = '\0';
+	buf = NULL;
+
+	cmd = xmalloc(strlen(*iptr) + 1);
+	len = 0;
+
+	lastesc = 0;
+	for (; **iptr != '\0'; (*iptr)++) {
+		if (!lastesc && **iptr == ')')
+			break;		/* unescaped ) is the end */
+		if (!lastesc && **iptr == '\\') {
+			lastesc = 1;
+			continue;	/* skip \ if not escaped */
+		}
+		lastesc = 0;
+		cmd[len++] = **iptr;
+	}
+	if (**iptr == '\0')		/* no terminating ) */
+		goto out;
+	(*iptr)++;			/* skip final ) */
+	cmd[len] = '\0';
 
 	if ((f = popen(cmd, "r")) == NULL)
 		goto out;
@@ -398,7 +419,7 @@ status_replace_popen(char **iptr)
 		buf[len - 1] = '\0';
 		buf = xstrdup(buf);
 	} else {
-		ptr = xrealloc(ptr, 1, len + 1);
+		ptr = xmalloc(len + 1);
 		memcpy(ptr, buf, len);
 		ptr[len] = '\0';
 		buf = ptr;
@@ -406,7 +427,7 @@ status_replace_popen(char **iptr)
 	pclose(f);
 
 out:
-	*iptr = (strchr(*iptr, ')') + 1);
+	xfree(cmd);
 	return (buf);
 }