Add patches to check the binary exists before doing an /upgrade and to

stop eval recursive loops


git-svn-id: http://svn.irssi.org/repos/irssi/trunk@3857 dbcabf3a-b0e7-0310-adc4-f8d773084564

4 files changed, 142 insertions, 659 deletions

diff --git a/debian/patches/00list b/debian/patches/00list
index c620a7d3..3895656f 100644
--- a/debian/patches/00list
+++ b/debian/patches/00list
@@ -1,3 +1,5 @@
 01glib-errors
 02tr_TR
 03sigtstp
+04eval_recurse
+05upgrade-check-binary
diff --git a/debian/patches/03sigtstp.dpatch b/debian/patches/03sigtstp.dpatch
index 492030a0..0c973b27 100755
--- a/debian/patches/03sigtstp.dpatch
+++ b/debian/patches/03sigtstp.dpatch
@@ -33,662 +33,3 @@ diff -urNad --exclude=CVS --exclude=.svn ./src/fe-text/term-terminfo.c /tmp/dpep
  		terminfo_cont(current_term);
  		irssi_redraw();
  	}
-diff -urNad --exclude=CVS --exclude=.svn ./src/fe-text/term-terminfo.c.orig /tmp/dpep-work.uTVMh2/irssi-0.8.10~rc5/src/fe-text/term-terminfo.c.orig
---- ./src/fe-text/term-terminfo.c.orig	1970-01-01 02:00:00.000000000 +0200
-+++ /tmp/dpep-work.uTVMh2/irssi-0.8.10~rc5/src/fe-text/term-terminfo.c.orig	2004-05-14 15:24:23.000000000 +0300
-@@ -0,0 +1,655 @@
-+/*
-+ term-terminfo.c : irssi
-+
-+    Copyright (C) 2001 Timo Sirainen
-+
-+    This program is free software; you can redistribute it and/or modify
-+    it under the terms of the GNU General Public License as published by
-+    the Free Software Foundation; either version 2 of the License, or
-+    (at your option) any later version.
-+
-+    This program is distributed in the hope that it will be useful,
-+    but WITHOUT ANY WARRANTY; without even the implied warranty of
-+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-+    GNU General Public License for more details.
-+
-+    You should have received a copy of the GNU General Public License
-+    along with this program; if not, write to the Free Software
-+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
-+*/
-+
-+#include "module.h"
-+#include "signals.h"
-+#include "term.h"
-+#include "terminfo-core.h"
-+#include "utf8.h"
-+
-+#include <signal.h>
-+
-+/* returns number of characters in the beginning of the buffer being a
-+   a single character, or -1 if more input is needed. The character will be
-+   saved in result */
-+typedef int (*TERM_INPUT_FUNC)(const unsigned char *buffer, int size,
-+			       unichar *result);
-+
-+struct _TERM_WINDOW {
-+        /* Terminal to use for window */
-+	TERM_REC *term;
-+
-+        /* Area for window in terminal */
-+	int x, y;
-+	int width, height;
-+};
-+
-+TERM_WINDOW *root_window;
-+
-+static char *term_lines_empty; /* 1 if line is entirely empty */
-+static int vcmove, vcx, vcy, curs_visible;
-+static int crealx, crealy, cforcemove;
-+static int curs_x, curs_y;
-+static int auto_detach;
-+
-+static int last_fg, last_bg, last_attrs;
-+
-+static int redraw_needed, redraw_tag;
-+static int freeze_counter;
-+
-+static TERM_INPUT_FUNC input_func;
-+static unsigned char term_inbuf[256];
-+static int term_inbuf_pos;
-+
-+/* SIGCONT handler */
-+static void sig_cont(int p)
-+{
-+        redraw_needed = TRUE;
-+	terminfo_cont(current_term);
-+}
-+
-+static int redraw_timeout(void)
-+{
-+	if (redraw_needed) {
-+		irssi_redraw();
-+                redraw_needed = FALSE;
-+	}
-+
-+        return 1;
-+}
-+
-+int term_init(void)
-+{
-+	struct sigaction act;
-+        int width, height;
-+
-+	last_fg = last_bg = -1;
-+	last_attrs = 0;
-+	vcx = vcy = 0; crealx = crealy = -1;
-+	vcmove = FALSE; cforcemove = TRUE;
-+        curs_visible = TRUE;
-+
-+	current_term = terminfo_core_init(stdin, stdout);
-+	if (current_term == NULL)
-+		return FALSE;
-+
-+	if (term_get_size(&width, &height)) {
-+                current_term->width = width;
-+                current_term->height = height;
-+	}
-+
-+        /* grab CONT signal */
-+	sigemptyset(&act.sa_mask);
-+	act.sa_flags = 0;
-+	act.sa_handler = sig_cont;
-+	sigaction(SIGCONT, &act, NULL);
-+        redraw_tag = g_timeout_add(500, (GSourceFunc) redraw_timeout, NULL);
-+
-+	curs_x = curs_y = 0;
-+	term_width = current_term->width;
-+	term_height = current_term->height;
-+	root_window = term_window_create(0, 0, term_width, term_height);
-+        term_detached = FALSE;
-+
-+        term_lines_empty = g_new0(char, term_height);
-+
-+        term_set_input_type(TERM_TYPE_8BIT);
-+	term_common_init();
-+        g_atexit(term_deinit);
-+        return TRUE;
-+}
-+
-+void term_deinit(void)
-+{
-+	if (current_term != NULL) {
-+		signal(SIGCONT, SIG_DFL);
-+		g_source_remove(redraw_tag);
-+
-+		term_common_deinit();
-+		terminfo_core_deinit(current_term);
-+		current_term = NULL;
-+	}
-+}
-+
-+static void term_move_real(void)
-+{
-+	if (term_detached) return;
-+
-+	if (vcx != crealx || vcy != crealy || cforcemove) {
-+		if (curs_visible) {
-+			terminfo_set_cursor_visible(FALSE);
-+			curs_visible = FALSE;
-+		}
-+
-+		if (cforcemove) {
-+			crealx = crealy = -1;
-+			cforcemove = FALSE;
-+		}
-+		terminfo_move_relative(crealx, crealy, vcx, vcy);
-+                crealx = vcx; crealy = vcy;
-+	}
-+
-+        vcmove = FALSE;
-+}
-+
-+/* Cursor position is unknown - move it immediately to known position */
-+static void term_move_reset(int x, int y)
-+{
-+	if (x >= term_width) x = term_width-1;
-+	if (y >= term_height) y = term_height-1;
-+
-+	vcx = x; vcy = y;
-+        cforcemove = TRUE;
-+        term_move_real();
-+}
-+
-+/* Resize terminal - if width or height is negative,
-+   the new size is unknown and should be figured out somehow */
-+void term_resize(int width, int height)
-+{
-+	if (width < 0 || height < 0) {
-+		terminfo_resize(current_term);
-+		width = current_term->width;
-+                height = current_term->height;
-+	}
-+
-+	if (term_width != width || term_height != height) {
-+		term_width = current_term->width = width;
-+		term_height = current_term->height = height;
-+		term_window_move(root_window, 0, 0, term_width, term_height);
-+
-+                g_free(term_lines_empty);
-+		term_lines_empty = g_new0(char, term_height);
-+	}
-+
-+        term_move_reset(0, 0);
-+}
-+
-+void term_resize_final(int width, int height)
-+{
-+}
-+
-+/* Returns TRUE if terminal has colors */
-+int term_has_colors(void)
-+{
-+        return current_term->has_colors;
-+}
-+
-+/* Force the colors on any way you can */
-+void term_force_colors(int set)
-+{
-+	if (term_detached) return;
-+
-+	terminfo_setup_colors(current_term, set);
-+}
-+
-+/* Clear screen */
-+void term_clear(void)
-+{
-+	if (term_detached) return;
-+
-+        term_set_color(root_window, ATTR_RESET);
-+	terminfo_clear();
-+        term_move_reset(0, 0);
-+
-+	memset(term_lines_empty, 1, term_height);
-+}
-+
-+/* Beep */
-+void term_beep(void)
-+{
-+	if (term_detached) return;
-+
-+        terminfo_beep(current_term);
-+}
-+
-+/* Create a new window in terminal */
-+TERM_WINDOW *term_window_create(int x, int y, int width, int height)
-+{
-+	TERM_WINDOW *window;
-+
-+	window = g_new0(TERM_WINDOW, 1);
-+        window->term = current_term;
-+	window->x = x; window->y = y;
-+	window->width = width; window->height = height;
-+        return window;
-+}
-+
-+/* Destroy a terminal window */
-+void term_window_destroy(TERM_WINDOW *window)
-+{
-+        g_free(window);
-+}
-+
-+/* Move/resize a window */
-+void term_window_move(TERM_WINDOW *window, int x, int y,
-+		      int width, int height)
-+{
-+	window->x = x;
-+	window->y = y;
-+	window->width = width;
-+        window->height = height;
-+}
-+
-+/* Clear window */
-+void term_window_clear(TERM_WINDOW *window)
-+{
-+	int y;
-+
-+	if (term_detached) return;
-+
-+        terminfo_set_normal();
-+        if (window->y == 0 && window->height == term_height) {
-+        	term_clear();
-+        } else {
-+		for (y = 0; y < window->height; y++) {
-+			term_move(window, 0, y);
-+			term_clrtoeol(window);
-+		}
-+	}
-+}
-+
-+/* Scroll window up/down */
-+void term_window_scroll(TERM_WINDOW *window, int count)
-+{
-+	int y;
-+
-+	if (term_detached) return;
-+
-+	terminfo_scroll(window->y, window->y+window->height-1, count);
-+        term_move_reset(vcx, vcy);
-+
-+        /* set the newly scrolled area dirty */
-+	for (y = 0; y < window->height; y++)
-+		term_lines_empty[window->y+y] = FALSE;
-+}
-+
-+/* Change active color */
-+void term_set_color(TERM_WINDOW *window, int col)
-+{
-+	int set_normal;
-+
-+	if (term_detached) return;
-+
-+        set_normal = ((col & ATTR_RESETFG) && last_fg != -1) ||
-+		((col & ATTR_RESETBG) && last_bg != -1);
-+	if (((last_attrs & ATTR_BOLD) && (col & ATTR_BOLD) == 0) ||
-+	    ((last_attrs & ATTR_BLINK) && (col & ATTR_BLINK) == 0)) {
-+		/* we'll need to get rid of bold/blink - this can only be
-+		   done with setting the default color */
-+		set_normal = TRUE;
-+	}
-+
-+	if (set_normal) {
-+		last_fg = last_bg = -1;
-+                last_attrs = 0;
-+		terminfo_set_normal();
-+	}
-+
-+	if (!term_use_colors && (col & 0xf0) != 0)
-+		col |= ATTR_REVERSE;
-+
-+	/* reversed text (use standout) */
-+	if (col & ATTR_REVERSE) {
-+		if ((last_attrs & ATTR_REVERSE) == 0)
-+			terminfo_set_standout(TRUE);
-+	} else if (last_attrs & ATTR_REVERSE)
-+		terminfo_set_standout(FALSE);
-+
-+	/* set foreground color */
-+	if ((col & 0x0f) != last_fg &&
-+	    ((col & 0x0f) != 0 || (col & ATTR_RESETFG) == 0)) {
-+                if (term_use_colors) {
-+			last_fg = col & 0x0f;
-+			terminfo_set_fg(last_fg);
-+		}
-+	}
-+
-+	/* set background color */
-+	if (col & ATTR_BLINK)
-+		col |= 0x80;
-+	else if (col & 0x80)
-+		col |= ATTR_BLINK;
-+
-+	if ((col & 0xf0) >> 4 != last_bg &&
-+	    ((col & 0xf0) != 0 || (col & ATTR_RESETBG) == 0)) {
-+                if (term_use_colors) {
-+			last_bg = (col & 0xf0) >> 4;
-+			terminfo_set_bg(last_bg);
-+		}
-+	}
-+
-+	/* bold */
-+	if (col & 0x08)
-+		col |= ATTR_BOLD;
-+	else if (col & ATTR_BOLD)
-+		terminfo_set_bold();
-+
-+	/* underline */
-+	if (col & ATTR_UNDERLINE) {
-+		if ((last_attrs & ATTR_UNDERLINE) == 0)
-+			terminfo_set_uline(TRUE);
-+	} else if (last_attrs & ATTR_UNDERLINE)
-+		terminfo_set_uline(FALSE);
-+
-+        last_attrs = col & ~0xff;
-+}
-+
-+void term_move(TERM_WINDOW *window, int x, int y)
-+{
-+	vcmove = TRUE;
-+	vcx = x+window->x;
-+        vcy = y+window->y;
-+
-+	if (vcx >= term_width)
-+		vcx = term_width-1;
-+	if (vcy >= term_height)
-+                vcy = term_height-1;
-+}
-+
-+static void term_printed_text(int count)
-+{
-+	term_lines_empty[vcy] = FALSE;
-+
-+	/* if we continued writing past the line, wrap to next line.
-+	   However, next term_move() really shouldn't try to cache
-+	   the move, otherwise terminals would try to combine the
-+	   last word in upper line with first word in lower line. */
-+	vcx += count;
-+	while (vcx >= term_width) {
-+		vcx -= term_width;
-+		if (vcy < term_height-1) vcy++;
-+		if (vcx > 0) term_lines_empty[vcy] = FALSE;
-+	}
-+
-+	crealx += count;
-+	if (crealx >= term_width)
-+		cforcemove = TRUE;
-+}
-+
-+void term_addch(TERM_WINDOW *window, int chr)
-+{
-+	if (term_detached) return;
-+
-+	if (vcmove) term_move_real();
-+
-+	if (vcy < term_height-1 || vcx < term_width-1) {
-+		/* With UTF-8, move cursor only if this char is either
-+		   single-byte (8. bit off) or beginning of multibyte
-+		   (7. bit off) */
-+		if (term_type != TERM_TYPE_UTF8 ||
-+		    (chr & 0x80) == 0 || (chr & 0x40) == 0) {
-+			term_printed_text(1);
-+		}
-+
-+		putc(chr, window->term->out);
-+	}
-+}
-+
-+static void term_addch_utf8(TERM_WINDOW *window, unichar chr)
-+{
-+	char buf[10];
-+	int i, len;
-+
-+	len = utf16_char_to_utf8(chr, buf);
-+	for (i = 0;  i < len; i++)
-+                putc(buf[i], window->term->out);
-+}
-+
-+void term_add_unichar(TERM_WINDOW *window, unichar chr)
-+{
-+	if (term_detached) return;
-+
-+	if (vcmove) term_move_real();
-+	if (vcy == term_height-1 && vcx == term_width-1)
-+		return; /* last char in screen */
-+
-+	switch (term_type) {
-+	case TERM_TYPE_UTF8:
-+	  	term_printed_text(utf8_width(chr));
-+                term_addch_utf8(window, chr);
-+		break;
-+	case TERM_TYPE_BIG5:
-+		if (chr > 0xff) {
-+			term_printed_text(2);
-+			putc((chr >> 8) & 0xff, window->term->out);
-+		} else {
-+			term_printed_text(1);
-+		}
-+		putc((chr & 0xff), window->term->out);
-+                break;
-+	default:
-+		term_printed_text(1);
-+		putc(chr, window->term->out);
-+                break;
-+	}
-+}
-+
-+void term_addstr(TERM_WINDOW *window, const char *str)
-+{
-+	int len;
-+
-+	if (term_detached) return;
-+
-+	if (vcmove) term_move_real();
-+	len = strlen(str); /* FIXME utf8 or big5 */
-+        term_printed_text(len);
-+
-+	if (vcy != term_height || vcx != 0)
-+		fputs(str, window->term->out);
-+	else
-+		fwrite(str, 1, len-1, window->term->out);
-+}
-+
-+void term_clrtoeol(TERM_WINDOW *window)
-+{
-+	if (term_detached) return;
-+
-+	/* clrtoeol() doesn't necessarily understand colors */
-+	if (last_fg == -1 && last_bg == -1 &&
-+	    (last_attrs & (ATTR_UNDERLINE|ATTR_REVERSE)) == 0) {
-+		if (!term_lines_empty[vcy]) {
-+			if (vcmove) term_move_real();
-+			terminfo_clrtoeol();
-+			if (vcx == 0) term_lines_empty[vcy] = TRUE;
-+		}
-+	} else if (vcx < term_width) {
-+		/* we'll need to fill the line ourself. */
-+		if (vcmove) term_move_real();
-+		terminfo_repeat(' ', term_width-vcx);
-+		terminfo_move(vcx, vcy);
-+                term_lines_empty[vcy] = FALSE;
-+	}
-+}
-+
-+void term_move_cursor(int x, int y)
-+{
-+	curs_x = x;
-+        curs_y = y;
-+}
-+
-+void term_refresh(TERM_WINDOW *window)
-+{
-+	if (term_detached || freeze_counter > 0)
-+		return;
-+
-+	term_move(root_window, curs_x, curs_y);
-+	term_move_real();
-+
-+	if (!curs_visible) {
-+		terminfo_set_cursor_visible(TRUE);
-+                curs_visible = TRUE;
-+	}
-+
-+	term_set_color(window, ATTR_RESET);
-+	fflush(window != NULL ? window->term->out : current_term->out);
-+}
-+
-+void term_refresh_freeze(void)
-+{
-+        freeze_counter++;
-+}
-+
-+void term_refresh_thaw(void)
-+{
-+	if (--freeze_counter == 0)
-+                term_refresh(NULL);
-+}
-+
-+void term_auto_detach(int set)
-+{
-+        auto_detach = set;
-+}
-+
-+void term_detach(void)
-+{
-+	terminfo_stop(current_term);
-+
-+        fclose(current_term->in);
-+        fclose(current_term->out);
-+
-+	current_term->in = NULL;
-+	current_term->out = NULL;
-+        term_detached = TRUE;
-+}
-+
-+void term_attach(FILE *in, FILE *out)
-+{
-+	current_term->in = in;
-+	current_term->out = out;
-+        term_detached = FALSE;
-+
-+	terminfo_cont(current_term);
-+	irssi_redraw();
-+}
-+
-+void term_stop(void)
-+{
-+	if (term_detached) {
-+		kill(getpid(), SIGSTOP);
-+	} else {
-+		terminfo_stop(current_term);
-+		kill(getpid(), SIGSTOP);
-+		terminfo_cont(current_term);
-+		irssi_redraw();
-+	}
-+}
-+
-+static int input_utf8(const unsigned char *buffer, int size, unichar *result)
-+{
-+        const unsigned char *end = buffer;
-+
-+        *result = get_utf8_char(&end, size);
-+	switch (*result) {
-+	case (unichar) -2:
-+		/* not UTF8 - fallback to 8bit ascii */
-+		*result = *buffer;
-+		return 1;
-+	case (unichar) -1:
-+                /* need more data */
-+		return -1;
-+	default:
-+		return (int) (end-buffer)+1;
-+	}
-+}
-+
-+static int input_big5(const unsigned char *buffer, int size, unichar *result)
-+{
-+	if (is_big5_hi(*buffer)) {
-+		/* could be */
-+		if (size == 1)
-+			return -1;
-+
-+		if (is_big5_los(buffer[1]) || is_big5_lox(buffer[1])) {
-+                        *result = buffer[1] + ((int) *buffer << 8);
-+			return 2;
-+		}
-+	}
-+
-+        *result = *buffer;
-+	return 1;
-+}
-+
-+static int input_8bit(const unsigned char *buffer, int size, unichar *result)
-+{
-+        *result = *buffer;
-+        return 1;
-+}
-+
-+void term_set_input_type(int type)
-+{
-+	switch (type) {
-+	case TERM_TYPE_UTF8:
-+                input_func = input_utf8;
-+                break;
-+	case TERM_TYPE_BIG5:
-+                input_func = input_big5;
-+		break;
-+	default:
-+                input_func = input_8bit;
-+	}
-+}
-+
-+int term_gets(unichar *buffer, int size)
-+{
-+	int ret, i, char_len;
-+
-+	if (term_detached)
-+		return 0;
-+
-+        /* fread() doesn't work */
-+	if (size > sizeof(term_inbuf)-term_inbuf_pos)
-+		size = sizeof(term_inbuf)-term_inbuf_pos;
-+
-+	ret = read(fileno(current_term->in),
-+		   term_inbuf + term_inbuf_pos, size);
-+	if (ret == 0) {
-+		/* EOF - terminal got lost */
-+		if (auto_detach)
-+                        term_detach();
-+		ret = -1;
-+	} else if (ret == -1 && (errno == EINTR || errno == EAGAIN))
-+		ret = 0;
-+
-+	if (ret > 0) {
-+                /* convert input to unichars. */
-+		term_inbuf_pos += ret;
-+                ret = 0;
-+		for (i = 0; i < term_inbuf_pos; ) {
-+			char_len = input_func(term_inbuf+i, term_inbuf_pos-i,
-+					      buffer);
-+			if (char_len < 0)
-+				break;
-+
-+			i += char_len;
-+                        buffer++;
-+                        ret++;
-+		}
-+
-+		if (i >= term_inbuf_pos)
-+			term_inbuf_pos = 0;
-+		else if (i > 0) {
-+			memmove(term_inbuf, term_inbuf+i, term_inbuf_pos-i);
-+                        term_inbuf_pos -= i;
-+		}
-+	}
-+
-+	return ret;
-+}
diff --git a/debian/patches/04eval_recurse.dpatch b/debian/patches/04eval_recurse.dpatch
new file mode 100755
index 00000000..1ee9cb8a
--- /dev/null
+++ b/debian/patches/04eval_recurse.dpatch
@@ -0,0 +1,77 @@
+#! /bin/sh /usr/share/dpatch/dpatch-run
+## 04eval_recurse.dpatch by David Pashley <david@davidpashley.com>
+##
+## All lines beginning with `## DP:' are a description of the patch.
+## DP: No description.
+
+@DPATCH@
+diff -urNad --exclude=CVS --exclude=.svn ./src/core/commands.c /tmp/dpep-work.k5u2gD/irssi/src/core/commands.c
+--- ./src/core/commands.c	2005-07-16 00:48:59.000000000 +0300
++++ /tmp/dpep-work.k5u2gD/irssi/src/core/commands.c	2005-07-16 12:48:01.000000000 +0300
+@@ -945,12 +945,18 @@
+ 	parse_command(line, expand_aliases, server, item);
+ }
+ 
++static int eval_recursion_depth=0;
+ /* SYNTAX: EVAL <command(s)> */
+ static void cmd_eval(const char *data, SERVER_REC *server, void *item)
+ {
+ 	g_return_if_fail(data != NULL);
++	if (eval_recursion_depth > 100) 
++		cmd_return_error(CMDERR_EVAL_MAX_RECURSE);
+ 
++ 
++	eval_recursion_depth++;
+ 	eval_special_string(data, "", server, item);
++	eval_recursion_depth--;
+ }
+ 
+ /* SYNTAX: CD <directory> */
+diff -urNad --exclude=CVS --exclude=.svn ./src/core/commands.h /tmp/dpep-work.k5u2gD/irssi/src/core/commands.h
+--- ./src/core/commands.h	2005-07-16 00:48:59.000000000 +0300
++++ /tmp/dpep-work.k5u2gD/irssi/src/core/commands.h	2005-07-16 12:49:14.000000000 +0300
+@@ -39,7 +39,8 @@
+ 	CMDERR_ILLEGAL_PROTO, /* requires different chat protocol than the active server */
+ 	CMDERR_NOT_GOOD_IDEA, /* not good idea to do, -yes overrides this */
+ 	CMDERR_INVALID_TIME, /* invalid time specification */
+-	CMDERR_INVALID_CHARSET /* invalid charset specification */
++	CMDERR_INVALID_CHARSET, /* invalid charset specification */
++	CMDERR_EVAL_MAX_RECURSE /* eval hit recursion limit */
+ };
+ 
+ /* Return the full command for `alias' */
+diff -urNad --exclude=CVS --exclude=.svn ./src/fe-common/core/fe-core-commands.c /tmp/dpep-work.k5u2gD/irssi/src/fe-common/core/fe-core-commands.c
+--- ./src/fe-common/core/fe-core-commands.c	2005-07-16 00:48:55.000000000 +0300
++++ /tmp/dpep-work.k5u2gD/irssi/src/fe-common/core/fe-core-commands.c	2005-07-16 12:50:12.000000000 +0300
+@@ -49,7 +49,8 @@
+         TXT_ILLEGAL_PROTO,
+ 	TXT_NOT_GOOD_IDEA,
+         TXT_INVALID_TIME,
+-        TXT_INVALID_CHARSET
++        TXT_INVALID_CHARSET,
++        TXT_EVAL_MAX_RECURSE
+ };
+ 
+ int command_hide_output;
+diff -urNad --exclude=CVS --exclude=.svn ./src/fe-common/core/module-formats.c /tmp/dpep-work.k5u2gD/irssi/src/fe-common/core/module-formats.c
+--- ./src/fe-common/core/module-formats.c	2005-07-16 00:48:55.000000000 +0300
++++ /tmp/dpep-work.k5u2gD/irssi/src/fe-common/core/module-formats.c	2005-07-16 12:50:59.000000000 +0300
+@@ -219,6 +219,7 @@
+ 	{ "invalid_level", "Invalid message level", 0 },
+ 	{ "invalid_size", "Invalid size", 0 },
+ 	{ "invalid_charset", "Invalid charset: $0", 1, { 0 } },
++	{ "eval_max_recurse", "/eval hit maximum recursion limit", 0 },
+ 
+ 	/* ---- */
+ 	{ NULL, "Themes", 0 },
+diff -urNad --exclude=CVS --exclude=.svn ./src/fe-common/core/module-formats.h /tmp/dpep-work.k5u2gD/irssi/src/fe-common/core/module-formats.h
+--- ./src/fe-common/core/module-formats.h	2005-07-16 00:48:55.000000000 +0300
++++ /tmp/dpep-work.k5u2gD/irssi/src/fe-common/core/module-formats.h	2005-07-16 12:51:23.000000000 +0300
+@@ -188,6 +188,7 @@
+ 	TXT_INVALID_LEVEL,
+ 	TXT_INVALID_SIZE,
+ 	TXT_INVALID_CHARSET,
++	TXT_EVAL_MAX_RECURSE,
+ 
+ 	TXT_FILL_11,
+ 
diff --git a/debian/patches/05upgrade-check-binary.dpatch b/debian/patches/05upgrade-check-binary.dpatch
new file mode 100755
index 00000000..bd9621c6
--- /dev/null
+++ b/debian/patches/05upgrade-check-binary.dpatch
@@ -0,0 +1,63 @@
+#! /bin/sh /usr/share/dpatch/dpatch-run
+## 05upgrade-check-binary.dpatch by David Pashley <david@davidpashley.com>
+##
+## All lines beginning with `## DP:' are a description of the patch.
+## DP: No description.
+
+@DPATCH@
+diff -urNad --exclude=CVS --exclude=.svn ./src/core/commands.h /tmp/dpep-work.Ftr28C/irssi/src/core/commands.h
+--- ./src/core/commands.h	2005-07-16 13:12:12.000000000 +0300
++++ /tmp/dpep-work.Ftr28C/irssi/src/core/commands.h	2005-07-16 13:17:06.000000000 +0300
+@@ -40,6 +40,7 @@
+ 	CMDERR_NOT_GOOD_IDEA, /* not good idea to do, -yes overrides this */
+ 	CMDERR_INVALID_TIME, /* invalid time specification */
+ 	CMDERR_INVALID_CHARSET, /* invalid charset specification */
++	CMDERR_PROGRAM_NOT_FOUND, /* program not found */
+ 	CMDERR_EVAL_MAX_RECURSE /* eval hit recursion limit */
+ };
+ 
+diff -urNad --exclude=CVS --exclude=.svn ./src/core/session.c /tmp/dpep-work.Ftr28C/irssi/src/core/session.c
+--- ./src/core/session.c	2005-07-16 00:48:59.000000000 +0300
++++ /tmp/dpep-work.Ftr28C/irssi/src/core/session.c	2005-07-16 13:16:10.000000000 +0300
+@@ -95,6 +95,8 @@
+ 		data = irssi_binary;
+ 	if (data == NULL)
+                 cmd_return_error(CMDERR_NOT_ENOUGH_PARAMS);
++	if (!(data = g_find_program_in_path(data)))
++                cmd_return_error(CMDERR_PROGRAM_NOT_FOUND);
+ 
+ 	/* save the session */
+         session_file = g_strdup_printf("%s/session", get_irssi_dir());
+diff -urNad --exclude=CVS --exclude=.svn ./src/fe-common/core/fe-core-commands.c /tmp/dpep-work.Ftr28C/irssi/src/fe-common/core/fe-core-commands.c
+--- ./src/fe-common/core/fe-core-commands.c	2005-07-16 13:12:12.000000000 +0300
++++ /tmp/dpep-work.Ftr28C/irssi/src/fe-common/core/fe-core-commands.c	2005-07-16 13:17:44.000000000 +0300
+@@ -50,6 +50,7 @@
+ 	TXT_NOT_GOOD_IDEA,
+         TXT_INVALID_TIME,
+         TXT_INVALID_CHARSET,
++        TXT_PROGRAM_NOT_FOUND,
+         TXT_EVAL_MAX_RECURSE
+ };
+ 
+diff -urNad --exclude=CVS --exclude=.svn ./src/fe-common/core/module-formats.c /tmp/dpep-work.Ftr28C/irssi/src/fe-common/core/module-formats.c
+--- ./src/fe-common/core/module-formats.c	2005-07-16 13:12:12.000000000 +0300
++++ /tmp/dpep-work.Ftr28C/irssi/src/fe-common/core/module-formats.c	2005-07-16 13:18:27.000000000 +0300
+@@ -219,6 +219,7 @@
+ 	{ "invalid_level", "Invalid message level", 0 },
+ 	{ "invalid_size", "Invalid size", 0 },
+ 	{ "invalid_charset", "Invalid charset: $0", 1, { 0 } },
++	{ "program_not_found", "Could not find file or file was not executable", 0 },
+ 	{ "eval_max_recurse", "/eval hit maximum recursion limit", 0 },
+ 
+ 	/* ---- */
+diff -urNad --exclude=CVS --exclude=.svn ./src/fe-common/core/module-formats.h /tmp/dpep-work.Ftr28C/irssi/src/fe-common/core/module-formats.h
+--- ./src/fe-common/core/module-formats.h	2005-07-16 13:12:12.000000000 +0300
++++ /tmp/dpep-work.Ftr28C/irssi/src/fe-common/core/module-formats.h	2005-07-16 13:18:48.000000000 +0300
+@@ -188,6 +188,7 @@
+ 	TXT_INVALID_LEVEL,
+ 	TXT_INVALID_SIZE,
+ 	TXT_INVALID_CHARSET,
++	TXT_PROGRAM_NOT_FOUND,
+ 	TXT_EVAL_MAX_RECURSE,
+ 
+ 	TXT_FILL_11,