manager.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:7k
- /* Copyright (C) 2000-2004 MySQL AB
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation.
- There are special exceptions to the terms and conditions of the GPL as it
- is applied to this software. View the full text of the exception in file
- EXCEPTIONS-CLIENT in the directory of this software distribution.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- #include <my_global.h>
- #if defined(THREAD)
- #include <my_pthread.h> /* because of signal() */
- #endif
- #include "mysql.h"
- #include "mysql_version.h"
- #include "mysqld_error.h"
- #include <my_sys.h>
- #include <mysys_err.h>
- #include <m_string.h>
- #include <m_ctype.h>
- #include <my_net.h>
- #include <errmsg.h>
- #include <violite.h>
- #include <sys/stat.h>
- #include <signal.h>
- #include <errno.h>
- #if defined(OS2)
- # include <sys/un.h>
- #elif defined(__NETWARE__)
- #include <netdb.h>
- #include <sys/select.h>
- #include <sys/utsname.h>
- #elif !defined( __WIN__)
- #include <sys/resource.h>
- #ifdef HAVE_SYS_UN_H
- # include <sys/un.h>
- #endif
- #include <netdb.h>
- #ifdef HAVE_SELECT_H
- # include <select.h>
- #endif
- #ifdef HAVE_SYS_SELECT_H
- #include <sys/select.h>
- #endif
- #include <sys/utsname.h>
- #endif /* __WIN__ */
- #ifndef INADDR_NONE
- #define INADDR_NONE -1
- #endif
- #define RES_BUF_SHIFT 5
- #define NET_BUF_SIZE 2048
- MYSQL_MANAGER* STDCALL mysql_manager_init(MYSQL_MANAGER* con)
- {
- int net_buf_size=NET_BUF_SIZE;
- if (!con)
- {
- if (!(con=(MYSQL_MANAGER*)my_malloc(sizeof(*con)+net_buf_size,
- MYF(MY_WME|MY_ZEROFILL))))
- return 0;
- con->free_me=1;
- con->net_buf=(char*)con+sizeof(*con);
- }
- else
- {
- bzero((char*)con,sizeof(*con));
- if (!(con->net_buf=my_malloc(net_buf_size,MYF(0))))
- return 0;
- }
- con->net_buf_pos=con->net_data_end=con->net_buf;
- con->net_buf_size=net_buf_size;
- return con;
- }
- MYSQL_MANAGER* STDCALL mysql_manager_connect(MYSQL_MANAGER* con,
- const char* host,
- const char* user,
- const char* passwd,
- unsigned int port)
- {
- my_socket sock;
- struct sockaddr_in sock_addr;
- in_addr_t ip_addr;
- char msg_buf[MAX_MYSQL_MANAGER_MSG];
- int msg_len;
- Vio* vio;
- my_bool not_used;
- if (!host)
- host="localhost";
- if (!user)
- user="root";
- if (!passwd)
- passwd="";
- if ((sock=(my_socket)socket(AF_INET,SOCK_STREAM,0)) == INVALID_SOCKET)
- {
- con->last_errno=errno;
- strmov(con->last_error,"Cannot create socket");
- goto err;
- }
- if (!(vio=vio_new(sock,VIO_TYPE_TCPIP,FALSE)))
- {
- con->last_errno=ENOMEM;
- strmov(con->last_error,"Cannot create network I/O object");
- goto err;
- }
- vio_blocking(vio, TRUE, ¬_used);
- my_net_init(&con->net,vio);
- bzero((char*) &sock_addr,sizeof(sock_addr));
- sock_addr.sin_family = AF_INET;
- if ((int) (ip_addr = inet_addr(host)) != (int) INADDR_NONE)
- {
- memcpy_fixed(&sock_addr.sin_addr,&ip_addr,sizeof(ip_addr));
- }
- else
- {
- int tmp_errno;
- struct hostent tmp_hostent,*hp;
- char buff2[GETHOSTBYNAME_BUFF_SIZE];
- hp = my_gethostbyname_r(host,&tmp_hostent,buff2,sizeof(buff2),
- &tmp_errno);
- if (!hp)
- {
- con->last_errno=tmp_errno;
- sprintf(con->last_error,"Could not resolve host '%-.64s'",host);
- my_gethostbyname_r_free();
- goto err;
- }
- memcpy(&sock_addr.sin_addr,hp->h_addr, (size_t) hp->h_length);
- my_gethostbyname_r_free();
- }
- sock_addr.sin_port = (ushort) htons((ushort) port);
- if (my_connect(sock,(struct sockaddr *) &sock_addr, sizeof(sock_addr),
- 0))
- {
- con->last_errno=errno;
- sprintf(con->last_error ,"Could not connect to %-.64s", host);
- goto err;
- }
- /* read the greating */
- if (my_net_read(&con->net) == packet_error)
- {
- con->last_errno=errno;
- strmov(con->last_error,"Read error on socket");
- goto err;
- }
- sprintf(msg_buf,"%-.16s %-.16sn",user,passwd);
- msg_len=strlen(msg_buf);
- if (my_net_write(&con->net,msg_buf,msg_len) || net_flush(&con->net))
- {
- con->last_errno=con->net.last_errno;
- strmov(con->last_error,"Write error on socket");
- goto err;
- }
- if (my_net_read(&con->net) == packet_error)
- {
- con->last_errno=errno;
- strmov(con->last_error,"Read error on socket");
- goto err;
- }
- if ((con->cmd_status=atoi((char*) con->net.read_pos)) != MANAGER_OK)
- {
- strmov(con->last_error,"Access denied");
- goto err;
- }
- if (!my_multi_malloc(MYF(0), &con->host, (uint)strlen(host)+1,
- &con->user, (uint)strlen(user)+1,
- &con->passwd, (uint)strlen(passwd)+1,
- NullS))
- {
- con->last_errno=ENOMEM;
- strmov(con->last_error,"Out of memory");
- goto err;
- }
- strmov(con->host,host);
- strmov(con->user,user);
- strmov(con->passwd,passwd);
- return con;
- err:
- {
- my_bool free_me=con->free_me;
- con->free_me=0;
- mysql_manager_close(con);
- con->free_me=free_me;
- }
- return 0;
- }
- void STDCALL mysql_manager_close(MYSQL_MANAGER* con)
- {
- /*
- No need to free con->user and con->passwd, because they were
- allocated in my_multimalloc() along with con->host, freeing
- con->hosts frees the whole block
- */
- my_free((gptr)con->host,MYF(MY_ALLOW_ZERO_PTR));
- net_end(&con->net);
- if (con->free_me)
- my_free((gptr)con,MYF(0));
- }
- int STDCALL mysql_manager_command(MYSQL_MANAGER* con,const char* cmd,
- int cmd_len)
- {
- if (!cmd_len)
- cmd_len=strlen(cmd);
- if (my_net_write(&con->net,(char*)cmd,cmd_len) || net_flush(&con->net))
- {
- con->last_errno=errno;
- strmov(con->last_error,"Write error on socket");
- return 1;
- }
- con->eof=0;
- return 0;
- }
- int STDCALL mysql_manager_fetch_line(MYSQL_MANAGER* con, char* res_buf,
- int res_buf_size)
- {
- char* res_buf_end=res_buf+res_buf_size;
- char* net_buf=(char*) con->net.read_pos, *net_buf_end;
- int res_buf_shift=RES_BUF_SHIFT;
- ulong num_bytes;
- if (res_buf_size<RES_BUF_SHIFT)
- {
- con->last_errno=ENOMEM;
- strmov(con->last_error,"Result buffer too small");
- return 1;
- }
- if ((num_bytes=my_net_read(&con->net)) == packet_error)
- {
- con->last_errno=errno;
- strmov(con->last_error,"socket read failed");
- return 1;
- }
- net_buf_end=net_buf+num_bytes;
- if ((con->eof=(net_buf[3]==' ')))
- res_buf_shift--;
- net_buf+=res_buf_shift;
- res_buf_end[-1]=0;
- for (;net_buf<net_buf_end && res_buf < res_buf_end;res_buf++,net_buf++)
- {
- if ((*res_buf=*net_buf) == 'r')
- {
- *res_buf=0;
- break;
- }
- }
- return 0;
- }