Enable all cppcheck rules

Makefile.am

@@ -31,10 +31,9 @@ release : dist ../utils/release.sh
 cppcheck:
 	cppcheck --quiet --error-exitcode=1 \
             -U CURLE_PEER_FAILED_VERIFICATION \
-            --enable=warning \
-            --enable=performance \
-            --enable=portability \
-            --enable=information \
-            --enable=missingInclude \
+            --enable=all \
             --suppress=missingIncludeSystem \
+            --suppress=unsignedLessThanZero \
+            --suppress=unusedFunction \
+            --suppress=variableScope \
             src/ test/

src/common_auth.cpp

@@ -18,6 +18,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  */
 
+#include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -77,7 +78,7 @@ inline unsigned char char_decode64(const char ch)
   }else if('=' == ch){                         // =
     by = 64;
   }else{                                       // something wrong
-    by = 64;
+    by = UCHAR_MAX;
   }
   return by;
 }

src/curl.cpp

@@ -619,7 +619,7 @@ bool S3fsCurl::LocateBundle(void)
 
 size_t S3fsCurl::WriteMemoryCallback(void* ptr, size_t blockSize, size_t numBlocks, void* data)
 {
-  BodyData* body  = (BodyData*)data;
+  BodyData* body  = static_cast<BodyData*>(data);
 
   if(!body->Append(ptr, blockSize, numBlocks)){
     DPRNCRIT("BodyData.Append() returned false.");

src/s3fs.cpp

@@ -844,7 +844,6 @@ static int create_file_object(const char* path, mode_t mode, uid_t uid, gid_t gi
 static int s3fs_mknod(const char *path, mode_t mode, dev_t rdev)
 {
   int       result;
-  headers_t meta;
   struct fuse_context* pcxt;
 
   FPRN("[path=%s][mode=%04o][dev=%ju]", path, mode, (uintmax_t)rdev);
@@ -866,7 +865,6 @@ static int s3fs_mknod(const char *path, mode_t mode, dev_t rdev)
 static int s3fs_create(const char* path, mode_t mode, struct fuse_file_info* fi)
 {
   int result;
-  headers_t meta;
   struct fuse_context* pcxt;
 
   FPRN("[path=%s][mode=%04o][flags=%d]", path, mode, fi->flags);
@@ -1937,7 +1935,6 @@ static int s3fs_truncate(const char* path, off_t size)
 static int s3fs_open(const char* path, struct fuse_file_info* fi)
 {
   int result;
-  headers_t meta;
   struct stat st;
 
   FPRN("[path=%s][flags=%d]", path, fi->flags);
@@ -2301,7 +2298,6 @@ static int readdir_multi_head(const char* path, S3ObjList& head, void* buf, fuse
 static int s3fs_readdir(const char* path, void* buf, fuse_fill_dir_t filler, off_t offset, struct fuse_file_info* fi)
 {
   S3ObjList head;
-  s3obj_list_t headlist;
   int result;
 
   FPRN("[path=%s]", path);
@@ -2672,7 +2668,6 @@ static char* get_object_name(xmlDocPtr doc, xmlNodePtr node, const char* path)
   }
 
   // Make dir path and filename
-  string   strfullpath= (char*)fullpath;
   string   strdirpath = mydirname(string((char*)fullpath));
   string   strmybpath = mybasename(string((char*)fullpath));
   const char* dirpath = strdirpath.c_str();

src/s3fs_util.cpp

@@ -479,7 +479,6 @@ bool AutoLock::Unlock(void)
 string get_username(uid_t uid)
 {
   static size_t maxlen = 0;	// set onece
-  int result;
   char* pbuf;
   struct passwd pwinfo;
   struct passwd* ppwinfo = NULL;
@@ -499,7 +498,7 @@ string get_username(uid_t uid)
     return string("");
   }
   // get group information
-  if(0 != (result = getpwuid_r(uid, &pwinfo, pbuf, maxlen, &ppwinfo))){
+  if(0 != getpwuid_r(uid, &pwinfo, pbuf, maxlen, &ppwinfo)){
     DPRNNN("could not get pw information.");
     free(pbuf);
     return string("");