From: Steve Huntley <stephen.huntley@alum.mit.edu>
Date: Wed, 29 Dec 2010 09:57:43 +0000 (+0000)
Subject: 2010-12-29  Steve Huntley  <stephen.huntley@alum.mit.edu>
X-Git-Url: https://privyetmir.co.uk/gitweb.cgi?a=commitdiff_plain;h=6cb8aa9f77110ebf9976e36749a2f58a705214cb;p=tclvfs

2010-12-29  Steve Huntley  <stephen.huntley@alum.mit.edu>

	* generic/vfs.c: include sys/stat.h so build under MinGW64 will succeed.
	See bug #3107382.
	* library/zipvfs.tcl: Fixed issues with clock handling, dealing with
	trying to [open] a directory, reading a zip file that has been appended
	to another file.  See bugs 3103687, 3107380
---

diff --git a/ChangeLog b/ChangeLog
index b261d85..bfbe27c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2010-12-29  Steve Huntley  <stephen.huntley@alum.mit.edu>
+
+	* generic/vfs.c: include sys/stat.h so build under MinGW64 will succeed.
+	See bug #3107382.
+	* library/zipvfs.tcl: Fixed issues with clock handling, dealing with 
+	trying to [open] a directory, reading a zip file that has been appended
+	to another file.  See bugs 3103687, 3107380
+
 2010-05-16  Steve Huntley  <stephen.huntley@alum.mit.edu>
 
 	* library/vfslib.tcl: Changed memchan condition from Tcl version 8.6 or
diff --git a/generic/vfs.c b/generic/vfs.c
index effcfdc..5ff2459 100644
--- a/generic/vfs.c
+++ b/generic/vfs.c
@@ -20,6 +20,9 @@
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  */
 
+#ifdef HAVE_SYS_STAT_H
+#  include <sys/stat.h>
+#endif
 #include <tcl.h>
 /* Required to access the 'stat' structure fields, and TclInExit() */
 #include "tclInt.h"
diff --git a/library/zipvfs.tcl b/library/zipvfs.tcl
index 45cfbed..741380c 100644
--- a/library/zipvfs.tcl
+++ b/library/zipvfs.tcl
@@ -107,6 +107,10 @@ proc vfs::zip::open {zipfd name mode permissions} {
 	    
 	    ::zip::stat $zipfd $name sb
 
+            if {$sb(ino) == -1} {
+                vfs::filesystem posixerror $::vfs::posix(EISDIR)
+            }
+
 	    set nfd [vfs::memchan]
 	    fconfigure $nfd -translation binary
 
@@ -263,21 +267,21 @@ proc zip::DosTime {date time} {
     set year [expr { (($date >> 9) & 0xFF) + 1980 }]
 
     # Fix up bad date/time data, no need to fail
-    while {$sec  > 59} {incr sec  -60}
-    while {$min  > 59} {incr sec  -60}
-    while {$hour > 23} {incr hour -24}
-    if {$mday < 1}  {incr mday}
-    if {$mon  < 1}  {incr mon}
-    while {$mon > 12} {incr hour -12}
-
-    while {[catch {
+    if {$sec  > 59} {set sec  59}
+    if {$min  > 59} {set min  59}
+    if {$hour > 23} {set hour 23}
+    if {$mday < 1}  {set mday 1}
+    if {$mday > 31} {set mday 31}
+    if {$mon  < 1}  {set mon  1}
+    if {$mon > 12}  {set mon  12}
+
+    set res 0
+    catch {
 	set dt [format {%4.4d-%2.2d-%2.2d %2.2d:%2.2d:%2.2d} \
 		    $year $mon $mday $hour $min $sec]
 	set res [clock scan $dt -gmt 1]
-    }]} {
-	# Only mday can be wrong, at end of month
-	incr mday -1
     }
+
     return $res
 }
 
@@ -377,6 +381,11 @@ proc zip::EndOfArchive {fd arr} {
     # after the whole file has been searched.
 
     set sz  [tell $fd]
+    if {[info exists ::zip::max_header_seek]} {
+        if {$::zip::max_header_seek < $sz} {
+            set sz $::zip::max_header_seek
+        }
+    }
     set len 512
     set at  512
     while {1} {
@@ -403,8 +412,13 @@ proc zip::EndOfArchive {fd arr} {
 	}
     }
 
-    set hdr [string range $hdr [expr {$pos + 4}] [expr {$pos + 21}]]
-    set pos [expr {[tell $fd] + $pos - 512}]
+    set hdr [string range $hdr [expr $pos + 4] [expr $pos + 21]]
+ 
+     set seekstart [expr {[tell $fd] - 512}]
+     if {$seekstart < 0} {
+         set seekstart 0
+     }
+     set pos [expr {$seekstart + $pos}]
 
     binary scan $hdr ssssiis \
 	cb(ndisk) cb(cdisk) \
@@ -419,10 +433,15 @@ proc zip::EndOfArchive {fd arr} {
 
     # Compute base for situations where ZIP file
     # has been appended to another media (e.g. EXE)
-    set cb(base)	[expr { $pos - $cb(csize) - $cb(coff) }]
+    set base            [expr { $pos - $cb(csize) - $cb(coff) }]
+    if {$base < 0} {
+        set base 0
+    }
+    set cb(base)	$base
 }
 
 proc zip::TOC {fd arr} {
+    upvar #0 zip::$fd cb
     upvar 1 $arr sb
 
     set buf [read $fd 46]
@@ -433,6 +452,8 @@ proc zip::TOC {fd arr} {
       flen elen clen sb(disk) sb(attr) \
       sb(atx) sb(ino)
 
+    set sb(ino) [expr {$cb(base) + $sb(ino)}]
+
     if { ![string equal "PK\01\02" $hdr] } {
 	binary scan $hdr H* x
 	return -code error "bad central header: $x"
@@ -473,7 +494,7 @@ proc zip::open {path} {
 	
 	zip::EndOfArchive $fd cb
 
-	seek $fd $cb(coff) start
+	seek $fd [expr {$cb(base) + $cb(coff)}] start
 
 	set toc(_) 0; unset toc(_); #MakeArray