various fixes

server-tools/instance-manager/buffer.cc:
  use my_realloc instead of realloc
server-tools/instance-manager/buffer.h:
  use my_malloc instead of malloc
server-tools/instance-manager/commands.cc:
  No need to send a buffer if there were some error while writing to it
server-tools/instance-manager/instance_options.cc:
  cleanup
server-tools/instance-manager/manager.cc:
  check sigwait return value
server-tools/instance-manager/parse_output.cc:
  fixed a bug, found with valgrind

server-tools/instance-manager/buffer.cc

@@ -81,10 +81,10 @@ int Buffer::reserve(uint position, uint len_arg)
 
   if (position + len_arg>= buffer_size)
   {
-    buffer= (char *) realloc(buffer,
-                             min(MAX_BUFFER_SIZE,
-                                 max((uint) (buffer_size*1.5),
-                                     position + len_arg)));
+    buffer= (char *) my_realloc(buffer,
+                                min(MAX_BUFFER_SIZE,
+                                    max((uint) (buffer_size*1.5),
+                                        position + len_arg)), MYF(0));
     if (buffer == NULL)
       goto err;
     buffer_size= (uint) (buffer_size*1.5);

server-tools/instance-manager/buffer.h

@@ -17,6 +17,7 @@
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
 
 #include <my_global.h>
+#include <my_sys.h>
 
 #ifdef __GNUC__
 #pragma interface
@@ -45,7 +46,7 @@ public:
     /*
       As append() will invokes realloc() anyway, it's ok if malloc returns 0
     */
-    if (!(buffer= (char*) malloc(buffer_size)))
+    if (!(buffer= (char*) my_malloc(buffer_size, MYF(0))))
         buffer_size= 0;
   }
 

server-tools/instance-manager/commands.cc

@@ -184,8 +184,8 @@ int Show_instance_status::do_command(struct st_net *net,
     }
 
 
-    if (my_net_write(net, send_buff.buffer, (uint) position) ||
-        send_buff.is_error())
+    if (send_buff.is_error() ||
+        my_net_write(net, send_buff.buffer, (uint) position))
       goto err;
   }
 
@@ -271,8 +271,8 @@ int Show_instance_options::do_command(struct st_net *net,
       store_to_string(&send_buff,
                      (char *) instance->options.mysqld_path,
                      &position);
-      if (my_net_write(net, send_buff.buffer, (uint) position) ||
-          send_buff.is_error())
+      if (send_buff.is_error() ||
+          my_net_write(net, send_buff.buffer, (uint) position))
         goto err;
     }
 
@@ -281,8 +281,8 @@ int Show_instance_options::do_command(struct st_net *net,
       position= 0;
       store_to_string(&send_buff, (char *) "nonguarded", &position);
       store_to_string(&send_buff, "", &position);
-      if (my_net_write(net, send_buff.buffer, (uint) position) ||
-          send_buff.is_error())
+      if (send_buff.is_error() ||
+          my_net_write(net, send_buff.buffer, (uint) position))
         goto err;
     }
 
@@ -299,8 +299,8 @@ int Show_instance_options::do_command(struct st_net *net,
       store_to_string(&send_buff, option_value + 1, &position);
       /* join name and the value into the same option again */
       *option_value= '=';
-      if (my_net_write(net, send_buff.buffer, (uint) position) ||
-          send_buff.is_error())
+      if (send_buff.is_error() ||
+          my_net_write(net, send_buff.buffer, (uint) position))
         goto err;
     }
   }

server-tools/instance-manager/instance_options.cc

@@ -80,9 +80,7 @@ void Instance_options::get_pid_filename(char *result)
   char datadir[MAX_PATH_LEN];
 
   if (mysqld_datadir == NULL)
-  {
     get_default_option(datadir, sizeof(datadir), "--datadir");
-  }
   else
     strxnmov(datadir, MAX_PATH_LEN - 1, strchr(mysqld_datadir, '=') + 1,
              "/", NullS);
@@ -106,8 +104,8 @@ pid_t Instance_options::get_pid()
   FILE *pid_file_stream;
 
   /* get the pid */
-  if (pid_file_stream= my_fopen(pid_file_with_path,
-                                O_RDONLY | O_BINARY, MYF(0)))
+  if ((pid_file_stream= my_fopen(pid_file_with_path,
+                                O_RDONLY | O_BINARY, MYF(0))) != NULL)
   {
     pid_t pid;
 

server-tools/instance-manager/manager.cc

@@ -171,7 +171,14 @@ void manager(const Options &options)
 
   while (!shutdown_complete)
   {
-    sigwait(&mask, &signo);
+    int status= 0;
+
+    if (status= my_sigwait(&mask, &signo))
+    {
+      log_error("sigwait() failed");
+      goto err;
+    }
+
     switch (signo)
     {
       case THR_SERVER_ALARM:

server-tools/instance-manager/parse_output.cc

@@ -36,6 +36,10 @@
   DESCRIPTION
 
     Parse output of the "command". Find the "word" and return the next one
+
+  RETURN
+    0 - ok
+    1 - error occured
 */
 
 int parse_output_and_get_value(const char *command, const char *word,
@@ -49,7 +53,8 @@ int parse_output_and_get_value(const char *command, const char *word,
 
   wordlen= strlen(word);
 
-  output= popen(command, "r");
+  if ((output= popen(command, "r")) == NULL)
+    goto err;
 
   /*
     We want fully buffered stream. We also want system to
@@ -69,15 +74,18 @@ int parse_output_and_get_value(const char *command, const char *word,
       these are '/', '-' and '.' in the path expressions and filenames)
     */
     get_word((const char **) &linep, &lineword_len, NONSPACE);
-    if (!strncmp(word, linep, wordlen) && *result != '\0')
+    if (!strncmp(word, linep, wordlen))
     {
       /*
         If we have found the word, return the next one. This is usually
         an option value.
       */
+      linep+= lineword_len;                     /* swallow the previous one */
       get_word((const char **) &linep, &lineword_len, NONSPACE);
-      DBUG_ASSERT(result_len > lineword_len);
+      if (result_len <= lineword_len)
+        goto err;
       strncpy(result, linep, lineword_len);
+      result[lineword_len]= '\0';
       goto pclose;
     }
   }
@@ -87,4 +95,7 @@ pclose:
     return 1;
 
   return 0;
+
+err:
+  return 1;
 }