fix for 57337 [libjar does not retrieve link information]

r  = dveditz@netscape.com
sr = brendan@mozilla.org

modules/libjar/nsJAR.cpp

@@ -274,11 +274,17 @@ nsJAR::Extract(const char *zipEntry, nsIFile* outFile)
   else
   {
 #if defined(XP_UNIX)
-    char *path;
+    nsXPIDLCString path;
 
-    rv = outFile->GetPath(&path); 
+    rv = outFile->GetPath(getter_Copies(path)); 
     if (NS_SUCCEEDED(rv)) 
+    {
+      if (item->isSymlink) 
+      {
+        err = mZip.ResolveSymlink(path,item);
+      }
       chmod(path, item->mode);
+    }
 #endif
 
     RestoreModTime(item, outFile);  // non-fatal if this fails, ignore errors

modules/libjar/nsZipArchive.cpp

@@ -76,10 +76,24 @@ char * strdup(const char *src)
 
 #ifdef XP_UNIX
     #include <sys/stat.h>
+    #include <limits.h>
+    #include <unistd.h>
 #elif defined(XP_PC)
     #include <io.h>
 #endif
 
+#ifndef XP_UNIX /* we need to have some constant defined in limits.h and unistd.h */
+#  ifndef S_IFMT
+#    define S_IFMT 0170000
+#  endif
+#  ifndef S_IFLNK
+#    define S_IFLNK  0120000
+#  endif
+#  ifndef PATH_MAX
+#    define PATH_MAX 1024
+#  endif
+#endif  /* XP_UNIX */
+
 #include "zipfile.h"
 #include "zipstruct.h"
 #include "nsZipArchive.h"
@@ -87,6 +101,7 @@ char * strdup(const char *src)
 static PRUint16 xtoint(unsigned char *ii);
 static PRUint32 xtolong(unsigned char *ll);
 static PRUint16 ExtractMode(PRUint32 ext_attr);
+static PRBool   IsSymlink(PRUint32 ext_attr); 
 static void dosdate(char *aOutDateStr, PRUint16 aDate);
 static void dostime(char *aOutTimeStr, PRUint16 aTime);
 
@@ -549,11 +564,17 @@ PRInt32 nsZipArchive::ExtractFile(const char* zipEntry, const char* aOutname)
   PRInt32 status = ExtractFileToFileDesc(zipEntry, fOut, &item);
   PR_Close(fOut);
 
-  if (status != ZIP_OK) {
+  if (status != ZIP_OK) 
+  {
     PR_Delete(aOutname);
   }
 #if defined(XP_UNIX)
-  else {
+  else 
+  {
+    if (item->isSymlink) 
+    {
+       status = ResolveSymlink(aOutname,item);
+    }
     //-- set extracted file permissions
     chmod(aOutname, item->mode);
   }
@@ -703,8 +724,40 @@ PRInt32 nsZipArchive::FindFree( nsZipFind* aFind )
   return ZIP_OK;
 }
 
-
-
+#ifdef XP_UNIX
+//---------------------------------------------
+// nsZipArchive::ResolveSymlink
+//---------------------------------------------
+PRInt32 nsZipArchive::ResolveSymlink(const char *path, nsZipItem *item) 
+{
+  PRInt32    status = ZIP_OK;
+  if (item->isSymlink) 
+  {
+    char buf[PATH_MAX+1];
+    PRFileDesc * fIn = PR_Open(path, PR_RDONLY, 0644);
+    if (fIn) 
+    {
+      PRInt32 length = PATH_MAX;
+      length = PR_Read(fIn,(void*)buf,length);
+      PR_Close(fIn); 
+      fIn = 0;
+      if (   length <= 0
+	  || (buf[length] = 0, PR_Delete(path)) != 0
+	  || symlink(buf, path) != 0 )
+      {
+        status = ZIP_ERR_DISK;
+      }
+    } else {
+      status = ZIP_ERR_DISK;
+    }
+    if (fIn) 
+    {
+      PR_Close(fIn);
+    }
+  }
+  return status;
+}
+#endif 
 
 //***********************************************************
 //      nsZipArchive  --  private implementation
@@ -844,7 +897,9 @@ PRInt32 nsZipArchive::BuildFileList()
     item->size = xtolong( central->size );
     item->realsize = xtolong( central->orglen );
     item->crc32 = xtolong( central->crc32 );
-    item->mode = ExtractMode(xtolong( central->external_attributes )); 
+    PRUint32 external_attributes = xtolong( central->external_attributes );
+    item->mode = ExtractMode( external_attributes );
+    item->isSymlink = IsSymlink( external_attributes );
     item->time = xtoint( central->time );
     item->date = xtoint( central->date );
 
@@ -1594,6 +1649,18 @@ static PRUint16 ExtractMode(PRUint32 ext_attr)
     return (PRUint16) ext_attr;
 }
 
+
+/*
+ *  
+ *  Return true if the attributes are for a symbolic link 
+ *
+ */
+
+static PRBool IsSymlink(PRUint32 ext_attr) 
+{
+  return (((ext_attr>>16) & S_IFMT) == S_IFLNK) ? PR_TRUE : PR_FALSE;
+}
+
 /*
  *  d o s d a t e
  *

modules/libjar/nsZipArchive.h

@@ -65,6 +65,7 @@ public:
   PRUint16    mode;
   PRUint16    time;
   PRUint16    date;
+  PRBool      isSymlink;
 
   nsZipItem*  next;
 
@@ -216,6 +217,15 @@ public:
 
   PRInt32 FindFree( nsZipFind *aFind );
 
+#ifdef XP_UNIX
+  /**
+   * ResolveSymLinks
+   * @param path      where the file is located
+   * @param zipItem   the zipItem related to "path" 
+   */
+  PRInt32  ResolveSymlink(const char *path, nsZipItem *zipItem);
+#endif
+
 private:
   //--- private members ---
   

xpinstall/packager/unix/makexpi.pl

@@ -135,7 +135,7 @@ chdir("$inStagePath/$inComponentName");
 print "stripping libs in $inStagePath/$inComponentName...\n";
 RecursiveStrip(cwd());
 
-system("zip -r $inDestPath/$inComponentName.xpi *");
+system("zip -r -y $inDestPath/$inComponentName.xpi *");
 chdir("$saveCwdir");
 
 system("cp $inComponentName.js install.js");