static void create_mysql_upgrade_info_file(void)
{
FILE *out;
char upgrade_info_file[FN_REFLEN]= {0};
if (get_upgrade_info_file_name(upgrade_info_file))
return; /* Could not get filename => skip */
if (!(out= my_fopen(upgrade_info_file, O_TRUNC | O_WRONLY, MYF(0))))
{
fprintf(stderr,
"Could not create the upgrade info file '%s' in "
"the MySQL Servers datadir, errno: %d\n",
upgrade_info_file, errno);
return;
}
/* Write new version to file */
fputs(MYSQL_SERVER_VERSION, out);
my_fclose(out, MYF(0));
/*
Check if the upgrad_info_file was properly created/updated
It's not a fatal error -> just print a message if it fails
*/
if (!upgrade_already_done())
fprintf(stderr,
"Could not write to the upgrade info file '%s' in "
"the MySQL Servers datadir, errno: %d\n",
upgrade_info_file, errno);
return;
}
static int upgrade_already_done(void)
{
FILE *in;
char upgrade_info_file[FN_REFLEN]= {0};
char buf[sizeof(MYSQL_SERVER_VERSION)+1];
char *res;
if (get_upgrade_info_file_name(upgrade_info_file))
return 0; /* Could not get filename => not sure */
if (!(in= my_fopen(upgrade_info_file, O_RDONLY, MYF(0))))
return 0; /* Could not open file => not sure */
/*
Read from file, don't care if it fails since it
will be detected by the strncmp
*/
memset(buf, 0, sizeof(buf));
res= fgets(buf, sizeof(buf), in);
my_fclose(in, MYF(0));
if (!res)
return 0; /* Could not read from file => not sure */
return (strncmp(res, MYSQL_SERVER_VERSION,
sizeof(MYSQL_SERVER_VERSION)-1)==0);
}
static int upgrade_already_done(void)
{
FILE *in;
char upgrade_info_file[FN_REFLEN]= {0};
char buf[sizeof(MYSQL_SERVER_VERSION)+1];
if (get_upgrade_info_file_name(upgrade_info_file))
return 0; /* Could not get filename => not sure */
if (!(in= my_fopen(upgrade_info_file, O_RDONLY, MYF(0))))
return 0; /* Could not open file => not sure */
bzero(buf, sizeof(buf));
if (!fgets(buf, sizeof(buf), in))
{
/* Ignore, will be detected by strncmp() below */
}
my_fclose(in, MYF(0));
return (strncmp(buf, MYSQL_SERVER_VERSION,
sizeof(MYSQL_SERVER_VERSION)-1)==0);
}
