Added 'const' to arguments in get_one_option and find_typeset()

One should not change the program arguments!
This change also reduces warnings from the icc compiler.

Almost all changes are just syntax changes (adding const to
'get_one_option function' declarations).

Other changes:
- Added a few cast of 'argument' from 'const char*' to 'char *'. This
  was mainly in calls to 'external' functions we don't have control of.
- Ensure that all reset of 'password command line argument' are similar.
  (In almost all cases it was just adding a comment and a cast)
- In mysqlbinlog.cc and mysqld.cc there was a few cases that changed
  the command line argument. These places where changed to instead allocate
  the option in a MEM_ROOT to avoid changing the argument. Some of this
  code was changed to ensure that different programs did parsing the
  same way. Added a test case for the changes in mysqlbinlog.cc
- Changed a few variables that took their value from command line options
  from 'char *' to 'const char *'.

12 files changed, 118 insertions, 57 deletions

diff --git a/client/mariadb-conv.cc b/client/mariadb-conv.cc
index 03018a93dbc..835c6a2abe2 100644
--- a/client/mariadb-conv.cc
+++ b/client/mariadb-conv.cc
@@ -76,7 +76,7 @@ static struct my_option long_options[] =
 
 my_bool
 get_one_option(const struct my_option *opt,
-               char *value, const char *filename)
+               const char *value, const char *filename)
 {
   return 0;
 }
diff --git a/client/mysql.cc b/client/mysql.cc
index dcd9dfecef9..f2938d4c824 100644
--- a/client/mysql.cc
+++ b/client/mysql.cc
@@ -218,7 +218,7 @@ static void tee_print_sized_data(const char *, unsigned int, unsigned int, bool)
 /* The names of functions that actually do the manipulation. */
 static int get_options(int argc,char **argv);
 extern "C" my_bool get_one_option(int optid, const struct my_option *opt,
-                                  char *argument);
+                                  const char *argument);
 static int com_quit(String *str,char*),
 	   com_go(String *str,char*), com_ego(String *str,char*),
 	   com_print(String *str,char*),
@@ -1715,7 +1715,7 @@ static void usage(int version)
 
 
 my_bool
-get_one_option(const struct my_option *opt, char *argument, const char *)
+get_one_option(const struct my_option *opt, const char *argument, const char *)
 {
   switch(opt->id) {
   case OPT_CHARSETS_DIR:
@@ -1816,7 +1816,8 @@ get_one_option(const struct my_option *opt, char *argument, const char *)
     status.add_to_history= 0;
     if (!status.line_buff)
       ignore_errors= 0;                         // do it for the first -e only
-    if (!(status.line_buff= batch_readline_command(status.line_buff, argument)))
+    if (!(status.line_buff= batch_readline_command(status.line_buff,
+                                                   (char*) argument)))
       return 1;
     break;
   case 'o':
@@ -1830,10 +1831,15 @@ get_one_option(const struct my_option *opt, char *argument, const char *)
       argument= (char*) "";			// Don't require password
     if (argument)
     {
-      char *start= argument;
+      /*
+        One should not really change the argument, but we make an
+        exception for passwords
+      */
+      char *start= (char*) argument;
       my_free(opt_password);
       opt_password= my_strdup(PSI_NOT_INSTRUMENTED, argument, MYF(MY_FAE));
-      while (*argument) *argument++= 'x';		// Destroy argument
+      while (*argument)
+        *(char*)argument++= 'x';		// Destroy argument
       if (*start)
 	start[1]=0 ;
       tty_password= 0;
diff --git a/client/mysql_plugin.c b/client/mysql_plugin.c
index eddae6114e6..79b97eaea02 100644
--- a/client/mysql_plugin.c
+++ b/client/mysql_plugin.c
@@ -475,7 +475,8 @@ static void print_default_values(void)
 
 static my_bool
 get_one_option(const struct my_option *opt,
-               char *argument, const char *filename __attribute__((unused)))
+               const char *argument,
+               const char *filename __attribute__((unused)))
 {
   switch(opt->id) {
   case 'n':
diff --git a/client/mysql_upgrade.c b/client/mysql_upgrade.c
index 55afdbf9671..e49b0fd0dc0 100644
--- a/client/mysql_upgrade.c
+++ b/client/mysql_upgrade.c
@@ -270,7 +270,7 @@ static void add_one_option_cnf_file(DYNAMIC_STRING *ds,
 }
 
 static my_bool
-get_one_option(const struct my_option *opt, char *argument,
+get_one_option(const struct my_option *opt, const char *argument,
                const char *filename __attribute__((unused)))
 {
   my_bool add_option= TRUE;
@@ -301,10 +301,17 @@ get_one_option(const struct my_option *opt, char *argument,
     add_option= FALSE;
     if (argument)
     {
+      /*
+        One should not really change the argument, but we make an
+        exception for passwords
+      */
+      char *start= (char*) argument;
       /* Add password to ds_args before overwriting the arg with x's */
       add_one_option_cnf_file(&ds_args, opt, argument);
       while (*argument)
-        *argument++= 'x';                       /* Destroy argument */
+        *(char*)argument++= 'x';                /* Destroy argument */
+      if (*start)
+        start[1]= 0;
       tty_password= 0;
     }
     else
diff --git a/client/mysqladmin.cc b/client/mysqladmin.cc
index 1a128e61533..5b59cbed30d 100644
--- a/client/mysqladmin.cc
+++ b/client/mysqladmin.cc
@@ -69,7 +69,7 @@ static uint ex_var_count, max_var_length, max_val_length;
 static void print_version(void);
 static void usage(void);
 extern "C" my_bool get_one_option(int optid, const struct my_option *opt,
-                                  char *argument);
+                                  const char *argument);
 static my_bool sql_connect(MYSQL *mysql, uint wait);
 static int execute_commands(MYSQL *mysql,int argc, char **argv);
 static char **mask_password(int argc, char ***argv);
@@ -241,7 +241,7 @@ static const char *load_default_groups[]=
   0 };
 
 my_bool
-get_one_option(const struct my_option *opt, char *argument, const char *)
+get_one_option(const struct my_option *opt, const char *argument, const char *)
 {
   switch(opt->id) {
   case 'c':
@@ -252,10 +252,15 @@ get_one_option(const struct my_option *opt, char *argument, const char *)
       argument= (char*) "";			// Don't require password
     if (argument)
     {
-      char *start=argument;
+      /*
+        One should not really change the argument, but we make an
+        exception for passwords
+      */
+      char *start= (char*) argument;
       my_free(opt_password);
       opt_password=my_strdup(PSI_NOT_INSTRUMENTED, argument,MYF(MY_FAE));
-      while (*argument) *argument++= 'x';		/* Destroy argument */
+      while (*argument)
+        *(char*) argument++= 'x';		/* Destroy argument */
       if (*start)
 	start[1]=0;				/* Cut length of argument */
       tty_password= 0;
diff --git a/client/mysqlbinlog.cc b/client/mysqlbinlog.cc
index 02bff7c294c..fd31ab6694e 100644
--- a/client/mysqlbinlog.cc
+++ b/client/mysqlbinlog.cc
@@ -96,6 +96,7 @@ static FILE *result_file;
 static char *result_file_name= 0;
 static const char *output_prefix= "";
 static char **defaults_argv= 0;
+static MEM_ROOT glob_root;
 
 #ifndef DBUG_OFF
 static const char *default_dbug_option = "d:t:o,/tmp/mariadb-binlog.trace";
@@ -1889,6 +1890,7 @@ static void cleanup()
   my_free(const_cast<char*>(dirname_for_local_load));
   my_free(start_datetime_str);
   my_free(stop_datetime_str);
+  free_root(&glob_root, MYF(0));
 
   delete binlog_filter;
   delete glob_description_event;
@@ -1957,7 +1959,7 @@ static my_time_t convert_str_to_timestamp(const char* str)
 
 
 extern "C" my_bool
-get_one_option(const struct my_option *opt, char *argument, const char *)
+get_one_option(const struct my_option *opt, const char *argument, const char *)
 {
   bool tty_password=0;
   switch (opt->id) {
@@ -1981,10 +1983,15 @@ get_one_option(const struct my_option *opt, char *argument, const char *)
       argument= (char*) "";                     // Don't require password
     if (argument)
     {
+      /*
+        One should not really change the argument, but we make an
+        exception for passwords
+      */
       my_free(pass);
-      char *start=argument;
+      char *start= (char*) argument;
       pass= my_strdup(PSI_NOT_INSTRUMENTED, argument,MYF(MY_FAE));
-      while (*argument) *argument++= 'x';		/* Destroy argument */
+      while (*argument)
+        *(char*)argument++= 'x';		/* Destroy argument */
       if (*start)
         start[1]=0;				/* Cut length of argument */
     }
@@ -2035,46 +2042,46 @@ get_one_option(const struct my_option *opt, char *argument, const char *)
   case OPT_REWRITE_DB:    // db_from->db_to
   {
     /* See also handling of OPT_REPLICATE_REWRITE_DB in sql/mysqld.cc */
-    char* ptr;
-    char* key= argument;  // db-from
-    char* val;            // db-to
+    const char* ptr;
+    const char* key= argument;  // db-from
+    const char* val;            // db-to
 
-    // Where key begins
+    // Skipp pre-space in key
     while (*key && my_isspace(&my_charset_latin1, *key))
       key++;
 
     // Where val begins
-    if (!(ptr= strstr(argument, "->")))
+    if (!(ptr= strstr(key, "->")))
     {
-      sql_print_error("Bad syntax in rewrite-db: missing '->'!\n");
+      sql_print_error("Bad syntax in rewrite-db: missing '->'\n");
       return 1;
     }
     val= ptr + 2;
-    while (*val && my_isspace(&my_charset_latin1, *val))
-      val++;
 
-    // Write \0 and skip blanks at the end of key
-    *ptr-- = 0;
-    while (my_isspace(&my_charset_latin1, *ptr) && ptr > argument)
-      *ptr-- = 0;
+    // Skip blanks at the end of key
+    while (ptr > key && my_isspace(&my_charset_latin1, ptr[-1]))
+      ptr--;
 
-    if (!*key)
+    if (ptr == key)
     {
-      sql_print_error("Bad syntax in rewrite-db: empty db-from!\n");
+      sql_print_error("Bad syntax in rewrite-db: empty FROM db\n");
       return 1;
     }
+    key= strmake_root(&glob_root, key, (size_t) (ptr-key));
 
-    // Skip blanks at the end of val
-    ptr= val;
-    while (*ptr && !my_isspace(&my_charset_latin1, *ptr))
-      ptr++;
-    *ptr= 0;
+    /* Skipp pre space in value */
+    while (*val && my_isspace(&my_charset_latin1, *val))
+      val++;
 
-    if (!*val)
+    // Value ends with \0 or space
+    for (ptr= val; *ptr && !my_isspace(&my_charset_latin1, *ptr) ; ptr++)
+    {}
+    if (ptr == val)
     {
-      sql_print_error("Bad syntax in rewrite-db: empty db-to!\n");
+      sql_print_error("Bad syntax in rewrite-db: empty TO db\n");
       return 1;
     }
+    val= strmake_root(&glob_root, val, (size_t) (ptr-val));
 
     binlog_filter->add_db_rewrite(key, val);
     break;
@@ -3045,6 +3052,8 @@ int main(int argc, char** argv)
   load_defaults_or_exit("my", load_groups, &argc, &argv);
   defaults_argv= argv;
 
+  init_alloc_root(PSI_NOT_INSTRUMENTED, &glob_root, 1024, 0, MYF(0));
+
   if (!(binlog_filter= new Rpl_filter))
   {
     error("Failed to create Rpl_filter");
diff --git a/client/mysqlcheck.c b/client/mysqlcheck.c
index d7eeec6198b..fb3103a318d 100644
--- a/client/mysqlcheck.c
+++ b/client/mysqlcheck.c
@@ -285,7 +285,8 @@ static void usage(void)
 
 static my_bool
 get_one_option(const struct my_option *opt,
-	       char *argument, const char *filename __attribute__((unused)))
+	       const char *argument,
+               const char *filename __attribute__((unused)))
 {
   int orig_what_to_do= what_to_do;
   DBUG_ENTER("get_one_option");
@@ -324,10 +325,15 @@ get_one_option(const struct my_option *opt,
       argument= (char*) "";			/* Don't require password */
     if (argument)
     {
-      char *start = argument;
+      /*
+        One should not really change the argument, but we make an
+        exception for passwords
+      */
+      char *start= (char*) argument;
       my_free(opt_password);
       opt_password = my_strdup(PSI_NOT_INSTRUMENTED, argument, MYF(MY_FAE));
-      while (*argument) *argument++= 'x';		/* Destroy argument */
+      while (*argument)
+        *(char*) argument++= 'x';		/* Destroy argument */
       if (*start)
 	start[1] = 0;                             /* Cut length of argument */
       tty_password= 0;
diff --git a/client/mysqldump.c b/client/mysqldump.c
index da4ec2756eb..7c363973da2 100644
--- a/client/mysqldump.c
+++ b/client/mysqldump.c
@@ -144,9 +144,9 @@ static char  *opt_password=0,*current_user=0,
              *current_host=0,*path=0,*fields_terminated=0,
              *lines_terminated=0, *enclosed=0, *opt_enclosed=0, *escaped=0,
              *where=0, *order_by=0,
-             *opt_compatible_mode_str= 0,
              *err_ptr= 0,
              *log_error_file= NULL;
+static const char *opt_compatible_mode_str= 0;
 static char **defaults_argv= 0;
 static char compatible_mode_normal_str[255];
 /* Server supports character_set_results session variable? */
@@ -279,7 +279,7 @@ static struct my_option my_long_options[] =
    "no_table_options, no_field_options. One can use several modes separated "
    "by commas. Note: Requires MariaDB server version 4.1.0 or higher. "
    "This option is ignored with earlier server versions.",
-   &opt_compatible_mode_str, &opt_compatible_mode_str, 0,
+   (char**) &opt_compatible_mode_str, (char**) &opt_compatible_mode_str, 0,
    GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
   {"compact", OPT_COMPACT,
    "Give less verbose output (useful for debugging). Disables structure "
@@ -849,7 +849,8 @@ uchar* get_table_key(const char *entry, size_t *length,
 
 static my_bool
 get_one_option(const struct my_option *opt,
-               char *argument, const char *filename __attribute__((unused)))
+               const char *argument,
+               const char *filename __attribute__((unused)))
 {
   switch (opt->id) {
   case 'p':
@@ -857,10 +858,15 @@ get_one_option(const struct my_option *opt,
       argument= (char*) "";                     /* Don't require password */
     if (argument)
     {
-      char *start=argument;
+      /*
+        One should not really change the argument, but we make an
+        exception for passwords
+      */
+      char *start= (char*) argument;
       my_free(opt_password);
       opt_password= my_strdup(PSI_NOT_INSTRUMENTED, argument, MYF(MY_FAE));
-      while (*argument) *argument++= 'x';               /* Destroy argument */
+      while (*argument)
+        *(char*) argument++= 'x';               /* Destroy argument */
       if (*start)
         start[1]=0;                             /* Cut length of argument */
       tty_password= 0;
diff --git a/client/mysqlimport.c b/client/mysqlimport.c
index 6cb32da2239..99b46ce3c6b 100644
--- a/client/mysqlimport.c
+++ b/client/mysqlimport.c
@@ -221,7 +221,7 @@ file. The SQL command 'LOAD DATA INFILE' is used to import the rows.\n");
 
 
 static my_bool
-get_one_option(const struct my_option *opt, char *argument,
+get_one_option(const struct my_option *opt, const char *argument,
                const char *filename __attribute__((unused)))
 {
   switch(opt->id) {
@@ -230,10 +230,15 @@ get_one_option(const struct my_option *opt, char *argument,
       argument= (char*) "";			/* Don't require password */
     if (argument)
     {
-      char *start=argument;
+      /*
+        One should not really change the argument, but we make an
+        exception for passwords
+      */
+      char *start= (char*) argument;
       my_free(opt_password);
       opt_password=my_strdup(PSI_NOT_INSTRUMENTED, argument,MYF(MY_FAE));
-      while (*argument) *argument++= 'x';		/* Destroy argument */
+      while (*argument)
+        *(char*) argument++= 'x';               /* Destroy argument */
       if (*start)
 	start[1]=0;				/* Cut length of argument */
       tty_password= 0;
diff --git a/client/mysqlshow.c b/client/mysqlshow.c
index 2b0cae6dc98..a89f4eb1dd2 100644
--- a/client/mysqlshow.c
+++ b/client/mysqlshow.c
@@ -289,7 +289,7 @@ are shown.");
 
 
 static my_bool
-get_one_option(const struct my_option *opt, char *argument,
+get_one_option(const struct my_option *opt, const char *argument,
                const char *filename __attribute__((unused)))
 {
   switch(opt->id) {
@@ -301,10 +301,15 @@ get_one_option(const struct my_option *opt, char *argument,
       argument= (char*) "";			/* Don't require password */
     if (argument)
     {
-      char *start=argument;
+      /*
+        One should not really change the argument, but we make an
+        exception for passwords
+      */
+      char *start= (char*) argument;
       my_free(opt_password);
       opt_password=my_strdup(PSI_NOT_INSTRUMENTED, argument, MYF(MY_FAE));
-      while (*argument) *argument++= 'x';		/* Destroy argument */
+      while (*argument)
+        *(char*) argument++= 'x';               /* Destroy argument */
       if (*start)
 	start[1]=0;				/* Cut length of argument */
       tty_password= 0;
diff --git a/client/mysqlslap.c b/client/mysqlslap.c
index 15aae234a94..1109ffbf3c8 100644
--- a/client/mysqlslap.c
+++ b/client/mysqlslap.c
@@ -726,7 +726,7 @@ static void usage(void)
 
 
 static my_bool
-get_one_option(const struct my_option *opt, char *argument,
+get_one_option(const struct my_option *opt, const char *argument,
                const char *filename __attribute__((unused)))
 {
   DBUG_ENTER("get_one_option");
@@ -739,10 +739,15 @@ get_one_option(const struct my_option *opt, char *argument,
       argument= (char*) "";			/* Don't require password */
     if (argument)
     {
-      char *start= argument;
+      /*
+        One should not really change the argument, but we make an
+        exception for passwords
+      */
+      char *start= (char*) argument;
       my_free(opt_password);
       opt_password= my_strdup(PSI_NOT_INSTRUMENTED, argument,MYF(MY_FAE));
-      while (*argument) *argument++= 'x';		/* Destroy argument */
+      while (*argument)
+        *(char*) argument++= 'x';		/* Destroy argument */
       if (*start)
         start[1]= 0;				/* Cut length of argument */
       tty_password= 0;
diff --git a/client/mysqltest.cc b/client/mysqltest.cc
index 417d3615995..13282153cfb 100644
--- a/client/mysqltest.cc
+++ b/client/mysqltest.cc
@@ -97,7 +97,8 @@ static int setenv(const char *name, const char *value, int overwrite);
 
 C_MODE_START
 static sig_handler signal_handler(int sig);
-static my_bool get_one_option(const struct my_option *, char *, const char *);
+static my_bool get_one_option(const struct my_option *, const char *,
+                              const char *);
 C_MODE_END
 
 enum {
@@ -7141,7 +7142,7 @@ void read_embedded_server_arguments(const char *name)
 
 
 static my_bool
-get_one_option(const struct my_option *opt, char *argument, const char *)
+get_one_option(const struct my_option *opt, const char *argument, const char *)
 {
   switch(opt->id) {
   case '#':
@@ -7189,9 +7190,14 @@ get_one_option(const struct my_option *opt, char *argument, const char *)
       argument= const_cast<char*>("");         // Don't require password
     if (argument)
     {
+      /*
+        One should not really change the argument, but we make an
+        exception for passwords
+      */
       my_free(opt_pass);
       opt_pass= my_strdup(PSI_NOT_INSTRUMENTED, argument, MYF(MY_FAE));
-      while (*argument) *argument++= 'x';		/* Destroy argument */
+      while (*argument)
+        *(char*)argument++= 'x';		/* Destroy argument */
       tty_password= 0;
     }
     else