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PROC_FDINFO plugin for workshop

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This commit is contained in:
Sergey Vojtovich
2017-10-31 15:14:29 +04:00
parent 6c8471920a
commit d2afcc0958
2 changed files with 92 additions and 0 deletions
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5
plugin/proc_info/mysql-test/proc_info/fdinfo.test Normal file
View File

@@ -0,0 +1,5 @@
SHOW CREATE TABLE INFORMATION_SCHEMA.PROC_FDINFO;
query_vertical SELECT PLUGIN_NAME, PLUGIN_VERSION, PLUGIN_TYPE, PLUGIN_AUTHOR, PLUGIN_DESCRIPTION, PLUGIN_LICENSE, PLUGIN_MATURITY FROM INFORMATION_SCHEMA.PLUGINS WHERE PLUGIN_NAME='proc_fdinfo';
SELECT * FROM INFORMATION_SCHEMA.PROC_FDINFO;
FLUSH TABLES;
SELECT * FROM INFORMATION_SCHEMA.PROC_FDINFO;

87
plugin/proc_info/proc_info.cc
View File

@@ -3,6 +3,7 @@
#include <sql_show.h>
#include <sql_class.h>
#include <mysql/plugin.h>
#include <dirent.h>
static ST_FIELD_INFO meminfo_fields[]=
@@ -58,6 +59,77 @@ static struct st_mysql_information_schema meminfo_plugin=
{ MYSQL_INFORMATION_SCHEMA_INTERFACE_VERSION };
static ST_FIELD_INFO fdinfo_fields[]=
{
{ "NAME", 100, MYSQL_TYPE_STRING, 0, 0, 0, SKIP_OPEN_TABLE },
{ "VALUE", FN_REFLEN, MYSQL_TYPE_STRING, 0, MY_I_S_MAYBE_NULL, 0,
SKIP_OPEN_TABLE },
{ 0, 0, MYSQL_TYPE_STRING, 0, 0, 0, 0 }
};
static int fdinfo_fill(MYSQL_THD thd, TABLE_LIST *tables, COND *cond)
{
TABLE *table= tables->table;
int fd;
DIR *dir;
struct dirent dirbuf, *result;
if ((fd= open("/proc/self/fd", O_DIRECTORY)) < 0)
return 1;
if (!(dir= fdopendir(fd)))
{
close(fd);
return 1;
}
while (readdir_r(dir, &dirbuf, &result) == 0 && result)
{
char buf[FN_REFLEN];
ssize_t len;
if (result->d_name[0] == '.')
continue;
len= readlinkat(fd, result->d_name, buf, sizeof(buf));
table->field[0]->store(result->d_name, strlen(result->d_name), system_charset_info);
if (len < 0)
table->field[1]->set_null();
else
{
table->field[1]->store(buf, len, system_charset_info);
table->field[1]->set_notnull();
}
if (schema_table_store_record(thd, table))
{
close(fd);
closedir(dir);
return 1;
}
}
close(fd);
closedir(dir);
return 0;
}
static int fdinfo_init(void *p)
{
ST_SCHEMA_TABLE *schema= (ST_SCHEMA_TABLE *) p;
schema->fields_info= fdinfo_fields;
schema->fill_table= fdinfo_fill;
return 0;
}
static struct st_mysql_information_schema fdinfo_plugin=
{ MYSQL_INFORMATION_SCHEMA_INTERFACE_VERSION };
maria_declare_plugin(proc_info)
{
MYSQL_INFORMATION_SCHEMA_PLUGIN, /* type */
@@ -73,5 +145,20 @@ maria_declare_plugin(proc_info)
NULL, /* system variables */
"1.0", /* version as a string */
MariaDB_PLUGIN_MATURITY_EXPERIMENTAL
},
{
MYSQL_INFORMATION_SCHEMA_PLUGIN, /* type */
&fdinfo_plugin, /* information schema */
"PROC_FDINFO", /* name */
"" , /* author */
"Useful information from /proc", /* description */
PLUGIN_LICENSE_BSD, /* license */
fdinfo_init, /* init callback */
0, /* deinit callback */
0x0100, /* version as hex */
NULL, /* status variables */
NULL, /* system variables */
"1.0", /* version as a string */
MariaDB_PLUGIN_MATURITY_EXPERIMENTAL
}
maria_declare_plugin_end;