mysqlmanager.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:44k
- /* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult 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; either version 2 of the License, or
- (at your option) any later version.
- 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 */
- /*
- MySQL server management daemon
- Written by:
- Sasha Pachev <sasha@mysql.com>
- */
- #ifndef __NETWARE__
- #include <my_global.h>
- #include <my_pthread.h>
- #include <mysql.h>
- #include <mysql_version.h>
- #include <mysqld_error.h>
- #include <my_sys.h>
- #include <my_dir.h>
- #include <m_string.h>
- #include <m_ctype.h>
- #include <hash.h>
- #include <my_getopt.h>
- #include <stdarg.h>
- #include <sys/stat.h>
- #include <errno.h>
- #include <violite.h>
- #include <md5.h>
- #include <signal.h>
- #ifdef HAVE_SYS_WAIT_H
- #include <sys/wait.h>
- #endif
- #define MANAGER_VERSION "1.2"
- #define MANAGER_GREETING "MySQL Server Management Daemon v. 1.2"
- #define LOG_ERR 1
- #define LOG_WARN 2
- #define LOG_INFO 3
- #define LOG_DEBUG 4
- #define CHILD_START 1
- #define CHILD_STOP 2
- #ifndef MANAGER_PORT
- #define MANAGER_PORT 23546
- #endif
- #ifndef MANAGER_CONNECT_RETRIES
- #define MANAGER_CONNECT_RETRIES 5
- #endif
- #ifndef MANAGER_MAX_CMD_LEN
- #define MANAGER_MAX_CMD_LEN 16384
- #endif
- #ifndef MANAGER_LOG_FILE
- #define MANAGER_LOG_FILE "/var/log/mysqlmanager.log"
- #endif
- #ifndef MANAGER_BACK_LOG
- #define MANAGER_BACK_LOG 50
- #endif
- #ifndef MAX_USER_NAME
- #define MAX_USER_NAME 16
- #endif
- #ifndef MANAGER_PW_FILE
- #define MANAGER_PW_FILE "/etc/mysqlmanager.passwd"
- #endif
- #ifndef MAX_HOST
- #define MAX_HOST 128
- #endif
- #ifndef MAX_LAUNCHER_MSG
- #define MAX_LAUNCHER_MSG 256
- #endif
- static CHARSET_INFO *cs= &my_charset_latin1;
- #define MAX_RETRY_COUNT 100
- /*
- Variable naming convention - if starts with manager_, either is set
- directly by the user, or used closely in ocnjunction with a variable
- set by the user
- */
- #if defined(__i386__) && defined(TARGET_OS_LINUX)
- #define DO_STACKTRACE 1
- #endif
- uint manager_port;
- FILE* errfp;
- const char* manager_log_file = MANAGER_LOG_FILE;
- pthread_mutex_t lock_log,lock_shutdown,lock_exec_hash,lock_launch_thd;
- pthread_cond_t cond_launch_thd;
- pthread_t loop_th,launch_msg_th;
- int manager_sock = -1;
- uchar* stack_bottom=0;
- struct sockaddr_in manager_addr;
- ulong manager_bind_addr;
- int manager_back_log;
- int in_shutdown = 0, shutdown_requested=0;
- int manager_connect_retries;
- const char* manager_greeting = MANAGER_GREETING;
- uint manager_max_cmd_len;
- const char* manager_pw_file=MANAGER_PW_FILE;
- my_bool one_thread; /* for debugging */
- typedef enum {PARAM_STDOUT,PARAM_STDERR} PARAM_TYPE;
- /* messages */
- #define MAX_CLIENT_MSG_LEN 256
- #define NET_BLOCK 2048
- #define MD5_LEN 16
- #define ESCAPE_CHAR '\'
- #define EOL_CHAR 'n'
- /* access flags */
- #define PRIV_SHUTDOWN 1
- struct manager_thd
- {
- NET net;
- char user[MAX_USER_NAME+1];
- int priv_flags;
- char* cmd_buf;
- int fatal,finished;
- };
- struct manager_user
- {
- char user[MAX_USER_NAME+1];
- char md5_pass[MD5_LEN];
- int user_len;
- const char* error;
- };
- HASH exec_hash,user_hash;
- struct manager_exec* cur_launch_exec=0;
- static struct manager_thd* manager_thd_new(Vio* vio);
- static struct manager_exec* manager_exec_new(char* arg_start,char* arg_end);
- static void manager_exec_print(NET* net,struct manager_exec* e);
- static void manager_thd_free(struct manager_thd* thd);
- static void manager_exec_free(void* e);
- static void manager_exec_connect(struct manager_exec* e);
- static int manager_exec_launch(struct manager_exec* e);
- static struct manager_exec* manager_exec_by_pid(pid_t pid);
- static struct manager_user* manager_user_new(char* buf);
- static void manager_user_free(void* u);
- static char* arg_strmov(char* dest, const char* src, int n);
- static byte* get_exec_key(const byte* e, uint* len,
- my_bool __attribute__((unused)) t);
- static byte* get_user_key(const byte* u, uint* len,
- my_bool __attribute__((unused)) t);
- static uint tokenize_args(char* arg_start,char** arg_end);
- static void init_arg_array(char* arg_str,char** args,uint arg_count);
- static int hex_val(char c);
- static int open_and_dup(int fd,char* path);
- static void update_req_len(struct manager_exec* e);
- typedef int (*manager_cmd_handler)(struct manager_thd*,char*,char*);
- static void handle_child(int __attribute__((unused)) sig);
- static void handle_sigpipe(int __attribute__((unused)) sig);
- /*
- exec() in a threaded application is full of problems.
- To solve this, we fork off a launcher at the very start
- and communicate with it through a pipe
- */
- static void fork_launcher();
- static void run_launcher_loop();
- int to_launcher_pipe[2],from_launcher_pipe[2];
- pid_t launcher_pid;
- int in_segfault=0;
- const char* pid_file = "/var/run/mysqlmanager.pid";
- int created_pid_file = 0;
- struct manager_cmd
- {
- const char* name;
- const char* help;
- manager_cmd_handler handler_func;
- int len;
- };
- struct manager_exec
- {
- char* ident;
- int ident_len;
- const char* error;
- char* bin_path;
- char** args;
- char con_user[16];
- char con_pass[16];
- int con_port;
- pid_t pid;
- int exit_code;
- pthread_mutex_t lock;
- pthread_cond_t cond;
- pthread_t th;
- char con_sock[FN_REFLEN];
- char con_host[MAX_HOST];
- char stderr_path[FN_REFLEN];
- char stdout_path[FN_REFLEN];
- MYSQL mysql;
- char* data_buf;
- int req_len;
- int start_wait_timeout;
- int stderr_path_size,stdout_path_size,data_buf_size;
- int num_args;
- };
- static int set_exec_param(struct manager_thd* thd, char* args_start,
- char* args_end, PARAM_TYPE param_type);
- #define HANDLE_DECL(com)
- static int com(struct manager_thd* thd, char* args_start,char* args_end)
- #define HANDLE_NOARG_DECL(com)
- static int com(struct manager_thd *thd,
- char *args_start __attribute__((unused)),
- char* args_end __attribute__((unused)))
- HANDLE_NOARG_DECL(handle_ping);
- HANDLE_NOARG_DECL(handle_quit);
- HANDLE_NOARG_DECL(handle_help);
- HANDLE_NOARG_DECL(handle_shutdown);
- HANDLE_DECL(handle_def_exec);
- HANDLE_DECL(handle_start_exec);
- HANDLE_DECL(handle_stop_exec);
- HANDLE_DECL(handle_set_exec_con);
- HANDLE_DECL(handle_set_exec_stdout);
- HANDLE_DECL(handle_set_exec_stderr);
- HANDLE_NOARG_DECL(handle_show_exec);
- HANDLE_DECL(handle_query);
- struct manager_cmd commands[] =
- {
- {"ping", "Check if this server is alive", handle_ping,4},
- {"quit", "Finish session", handle_quit,4},
- {"shutdown", "Shutdown this server", handle_shutdown,8},
- {"def_exec", "Define executable entry", handle_def_exec,8},
- {"start_exec", "Launch process defined by executable entry",
- handle_start_exec,10},
- {"stop_exec", "Stop process defined by executable entry",
- handle_stop_exec,9},
- {"set_exec_con", "Set connection parameters for executable entry",
- handle_set_exec_con,12},
- {"set_exec_stdout", "Set stdout path for executable entry",
- handle_set_exec_stdout,15},
- {"set_exec_stderr", "Set stderr path for executable entry",
- handle_set_exec_stderr,15},
- {"query","Run query against MySQL server",handle_query,5},
- {"show_exec","Show defined executable entries",handle_show_exec,9},
- {"help", "Print this message", handle_help,4},
- {0,0,0,0}
- };
- static struct my_option my_long_options[] =
- {
- #ifndef DBUG_OFF
- {"debug", '#', "Output debug log. Often this is 'd:t:o,filename'.",
- 0, 0, 0, GET_STR, OPT_ARG, 0, 0, 0, 0, 0, 0},
- #endif
- {"help", '?', "Display this help and exit.",
- 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
- {"port", 'P', "Port number to listen on.", (gptr*) &manager_port,
- (gptr*) &manager_port, 0, GET_UINT, REQUIRED_ARG, MANAGER_PORT, 0, 0, 0,
- 0, 0},
- {"log", 'l', "Path to log file.", (gptr*) &manager_log_file,
- (gptr*) &manager_log_file, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
- {"bind-address", 'b', "Address to listen on.", (gptr*) &manager_bind_addr,
- (gptr*) &manager_bind_addr, 0, GET_ULONG, REQUIRED_ARG, INADDR_ANY, 0,
- 0, 0, 0, 0},
- {"tcp-backlog", 'B', "Size of TCP/IP listen queue.",
- (gptr*) &manager_back_log, (gptr*) &manager_back_log, 0, GET_INT,
- REQUIRED_ARG, MANAGER_BACK_LOG, 0, 0, 0, 0, 0},
- {"greeting", 'g', "Set greeting on connect.", (gptr*) &manager_greeting,
- (gptr*) &manager_greeting, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
- {"max-command-len", 'm', "Maximum command length.",
- (gptr*) &manager_max_cmd_len, (gptr*) &manager_max_cmd_len, 0, GET_UINT,
- REQUIRED_ARG, MANAGER_MAX_CMD_LEN, 0, 0, 0, 0, 0},
- {"one-thread", 'd', "Use one thread ( for debugging).", (gptr*) &one_thread,
- (gptr*) &one_thread, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
- {"connect-retries", 'C', "Number of attempts to establish MySQL connection.",
- (gptr*) &manager_connect_retries, (gptr*) &manager_connect_retries, 0,
- GET_INT, REQUIRED_ARG, MANAGER_CONNECT_RETRIES, 0, 0, 0, 0, 0},
- {"password-file", 'p', "Password file for manager.",
- (gptr*) &manager_pw_file, (gptr*) &manager_pw_file, 0, GET_STR,
- REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
- {"pid-file", 'f', "Pid file to use.", (gptr*) &pid_file, (gptr*) &pid_file,
- 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
- {"version", 'V', "Output version information and exit.", 0, 0, 0,
- GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
- { 0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}
- };
- static void die(const char* fmt,...);
- static void print_time(FILE* fp);
- static void clean_up();
- static struct manager_cmd* lookup_cmd(char* s,int len);
- static int client_msg(NET* net,int err_code,const char* fmt,...);
- static int client_msg_pre(NET* net,int err_code,const char* fmt,...);
- static int client_msg_raw(NET* net,int err_code,int pre,const char* fmt,
- va_list args);
- static int authenticate(struct manager_thd* thd);
- /* returns pointer to end of line */
- static char* read_line(struct manager_thd* thd);
- static pthread_handler_decl(process_connection, arg);
- static pthread_handler_decl(process_launcher_messages, arg);
- static int exec_line(struct manager_thd* thd,char* buf,char* buf_end);
- #ifdef DO_STACKTRACE
- void print_stacktrace();
- #endif
- static void log_msg(const char* fmt, int msg_type, va_list args);
- /* No 'inline' here becasue functions with ... can't do that portable */
- #define LOG_MSG_FUNC(type,TYPE) static void type
- (const char* fmt,...) {
- va_list args;
- va_start(args,fmt);
- log_msg(fmt,TYPE,args);
- }
- LOG_MSG_FUNC(log_err,LOG_ERR)
- LOG_MSG_FUNC(log_warn,LOG_WARN)
- LOG_MSG_FUNC(log_info,LOG_INFO)
- #ifndef DBUG_OFF
- LOG_MSG_FUNC(log_debug,LOG_DEBUG)
- #else
- void log_debug(const char* fmt __attribute__((unused)),...) {}
- #endif
- static void handle_sigterm(int sig __attribute__((unused)))
- {
- log_info("Got SIGTERM");
- if (!one_thread)
- {
- kill(launcher_pid,SIGTERM);
- pthread_kill(loop_th,SIGTERM);
- }
- clean_up();
- exit(0);
- }
- #ifdef DO_STACKTRACE
- static void handle_segfault(int sig)
- {
- if (in_segfault)
- exit(1);
- in_segfault=1;
- fprintf(errfp,"Got fatal signal %dn",sig);
- print_stacktrace();
- exit(1);
- }
- #endif
- static void handle_sigpipe(int __attribute__((unused)) sig)
- {
- signal(SIGPIPE,handle_sigpipe);
- }
- #ifdef DO_STACKTRACE
- #define MAX_DEPTH 25
- #define SIGRETURN_FRAME_COUNT 1
- void print_stacktrace()
- {
- uchar** fp;
- int i;
- LINT_INIT(fp);
- fprintf(errfp,"Fatal errror, stacktrace follows:n");
- #ifdef __i386__
- __asm__ __volatile__("movl %%ebp,%0" :"=r"(fp) :"r"(fp));
- #endif
- if (!fp)
- {
- fprintf(errfp,"frame points is NULL, cannot trace stackn");
- return;
- }
- for (i=0;i<MAX_DEPTH && fp<(uchar**)stack_bottom;i++)
- {
- #ifdef __i386__
- uchar** new_fp = (uchar**)*fp;
- fprintf(errfp, "%pn", i == SIGRETURN_FRAME_COUNT ?
- *(fp+17) : *(fp+1));
- #endif /* __386__ */
- if (new_fp <= fp )
- {
- fprintf(errfp, "New value of fp=%p failed sanity check,
- terminating stack trace!n", new_fp);
- return;
- }
- fp = new_fp;
- }
- fprintf(errfp,"Stack trace successfuln");
- fflush(errfp);
- }
- #endif
- static int exec_line(struct manager_thd* thd,char* buf,char* buf_end)
- {
- char* p=buf;
- struct manager_cmd* cmd;
- for (;p<buf_end && !my_isspace(cs,*p);p++)
- *p=my_tolower(cs,*p);
- log_info("Command '%s'", buf);
- if (!(cmd=lookup_cmd(buf,(int)(p-buf))))
- {
- if (client_msg(&thd->net,MANAGER_CLIENT_ERR,
- "Unrecognized command '%s', type help to see list of supported
- commands", buf))
- thd->fatal=1;
- return 1;
- }
- for (;p<buf_end && my_isspace(cs,*p);p++);
- return cmd->handler_func(thd,p,buf_end);
- }
- static struct manager_cmd* lookup_cmd(char* s,int len)
- {
- struct manager_cmd* cmd = commands;
- for (;cmd->name;cmd++)
- {
- if (cmd->len == len && !memcmp(cmd->name,s,len))
- return cmd;
- }
- return 0;
- }
- HANDLE_NOARG_DECL(handle_ping)
- {
- client_msg(&thd->net,MANAGER_OK,"Server management daemon is alive");
- return 0;
- }
- HANDLE_NOARG_DECL(handle_quit)
- {
- client_msg(&thd->net,MANAGER_OK,"Goodbye");
- thd->finished=1;
- return 0;
- }
- HANDLE_NOARG_DECL(handle_help)
- {
- struct manager_cmd* cmd = commands;
- NET* net = &thd->net;
- client_msg_pre(net,MANAGER_INFO,"Available commands:");
- for (;cmd->name;cmd++)
- {
- client_msg_pre(net,MANAGER_INFO,"%s - %s", cmd->name, cmd->help);
- }
- client_msg_pre(net,MANAGER_INFO,"End of help");
- return 0;
- }
- HANDLE_NOARG_DECL(handle_shutdown)
- {
- client_msg(&thd->net,MANAGER_OK,"Shutdown started, goodbye");
- thd->finished=1;
- shutdown_requested = 1;
- if (!one_thread)
- {
- kill(launcher_pid,SIGTERM);
- pthread_kill(loop_th,SIGTERM);
- }
- return 0;
- }
- HANDLE_DECL(handle_set_exec_con)
- {
- int num_args;
- const char* error=0;
- struct manager_exec* e;
- char* arg_p;
- if ((num_args=tokenize_args(args_start,&args_end))<2)
- {
- error="Too few arguments";
- goto err;
- }
- arg_p=args_start;
- pthread_mutex_lock(&lock_exec_hash);
- if (!(e=(struct manager_exec*)hash_search(&exec_hash,arg_p,
- strlen(arg_p))))
- {
- pthread_mutex_unlock(&lock_exec_hash);
- error="Exec definition entry does not exist";
- goto err;
- }
- arg_p+=strlen(arg_p)+1;
- arg_p+=(strnmov(e->con_user,arg_p,sizeof(e->con_user))-e->con_user)+1;
- if (num_args >= 3)
- {
- arg_p+=(strnmov(e->con_host,arg_p,sizeof(e->con_host))-e->con_host)+1;
- if (num_args == 4)
- {
- if (!(e->con_port=atoi(arg_p)))
- strnmov(e->con_sock,arg_p,sizeof(e->con_sock));
- else
- e->con_sock[0]=0;
- }
- else if (num_args > 4)
- {
- pthread_mutex_unlock(&lock_exec_hash);
- error="Too many arguments";
- goto err;
- }
- }
- pthread_mutex_unlock(&lock_exec_hash);
- client_msg(&thd->net,MANAGER_OK,"Entry updated");
- return 0;
- err:
- client_msg(&thd->net,MANAGER_CLIENT_ERR,error);
- return 1;
- }
- HANDLE_DECL(handle_set_exec_stdout)
- {
- return set_exec_param(thd,args_start,args_end,PARAM_STDOUT);
- }
- HANDLE_DECL(handle_set_exec_stderr)
- {
- return set_exec_param(thd,args_start,args_end,PARAM_STDERR);
- }
- static int set_exec_param(struct manager_thd* thd, char* args_start,
- char* args_end, PARAM_TYPE param_type)
- {
- int num_args;
- const char* error=0;
- struct manager_exec* e;
- char* arg_p;
- char* param;
- int param_size;
- if ((num_args=tokenize_args(args_start,&args_end))<2)
- {
- error="Too few arguments";
- goto err;
- }
- arg_p=args_start;
- pthread_mutex_lock(&lock_exec_hash);
- if (!(e=(struct manager_exec*)hash_search(&exec_hash,arg_p,
- strlen(arg_p))))
- {
- pthread_mutex_unlock(&lock_exec_hash);
- error="Exec definition entry does not exist";
- goto err;
- }
- arg_p+=strlen(arg_p)+1;
- param_size=strlen(arg_p)+1;
- switch (param_type) {
- case PARAM_STDOUT:
- param=e->stdout_path;
- e->req_len+=(param_size-e->stdout_path_size);
- e->stdout_path_size=param_size;
- break;
- case PARAM_STDERR:
- param=e->stderr_path;
- e->req_len+=(param_size-e->stderr_path_size);
- e->stderr_path_size=param_size;
- break;
- default:
- error="Internal error";
- goto err;
- }
- strnmov(param,arg_p,FN_REFLEN);
- pthread_mutex_unlock(&lock_exec_hash);
- client_msg(&thd->net,MANAGER_OK,"Entry updated");
- return 0;
- err:
- client_msg(&thd->net,MANAGER_CLIENT_ERR,error);
- return 1;
- }
- HANDLE_DECL(handle_start_exec)
- {
- int num_args;
- struct manager_exec* e;
- int ident_len;
- const char* error=0;
- struct timespec t;
- if ((num_args=tokenize_args(args_start,&args_end))<1)
- {
- error="Too few arguments";
- goto err;
- }
- ident_len=strlen(args_start);
- pthread_mutex_lock(&lock_exec_hash);
- if (!(e=(struct manager_exec*)hash_search(&exec_hash,args_start,
- ident_len)))
- {
- pthread_mutex_unlock(&lock_exec_hash);
- error="Exec definition entry does not exist";
- goto err;
- }
- pthread_mutex_unlock(&lock_exec_hash);
- manager_exec_launch(e);
- if ((error=e->error))
- goto err;
- pthread_mutex_lock(&e->lock);
- t.tv_sec=time(0)+(e->start_wait_timeout=atoi(args_start+ident_len+1));
- t.tv_nsec=0;
- if (!e->pid)
- pthread_cond_timedwait(&e->cond,&e->lock,&t);
- if (!e->pid)
- {
- pthread_mutex_unlock(&e->lock);
- error="Process failed to start withing alotted time";
- goto err;
- }
- mysql_close(&e->mysql);
- manager_exec_connect(e);
- error=e->error;
- pthread_mutex_unlock(&e->lock);
- if (error)
- goto err;
- client_msg(&thd->net,MANAGER_OK,"'%s' started",e->ident);
- return 0;
- err:
- client_msg(&thd->net,MANAGER_CLIENT_ERR,error);
- return 1;
- }
- HANDLE_DECL(handle_stop_exec)
- {
- int num_args;
- struct timespec abstime;
- struct manager_exec* e;
- int ident_len;
- const char* error=0;
- if ((num_args=tokenize_args(args_start,&args_end))<2)
- {
- error="Too few arguments";
- goto err;
- }
- ident_len=strlen(args_start);
- abstime.tv_sec=time(0)+atoi(args_start+1+ident_len);
- abstime.tv_nsec=0;
- pthread_mutex_lock(&lock_exec_hash);
- if (!(e=(struct manager_exec*)hash_search(&exec_hash,args_start,
- ident_len)))
- {
- pthread_mutex_unlock(&lock_exec_hash);
- error="Exec definition entry does not exist";
- goto err;
- }
- pthread_mutex_unlock(&lock_exec_hash);
- pthread_mutex_lock(&e->lock);
- e->th=pthread_self();
- if (!e->pid)
- {
- /* e->th=0; */ /* th may be a struct */
- pthread_mutex_unlock(&e->lock);
- error="Process not running";
- goto err;
- }
- if (mysql_shutdown(&e->mysql, SHUTDOWN_DEFAULT))
- {
- /* e->th=0; */ /* th may be a struct */
- pthread_mutex_unlock(&e->lock);
- error="Could not send shutdown command";
- goto err;
- }
- if (e->pid)
- pthread_cond_timedwait(&e->cond,&e->lock,&abstime);
- if (e->pid)
- error="Process failed to terminate within alotted time";
- /* e->th=0; */ /* th may be a struct */
- pthread_mutex_unlock(&e->lock);
- if (!error)
- {
- client_msg(&thd->net,MANAGER_OK,"'%s' terminated",e->ident);
- return 0;
- }
- err:
- client_msg(&thd->net,MANAGER_CLIENT_ERR,error);
- return 1;
- }
- HANDLE_DECL(handle_query)
- {
- const char* error=0;
- struct manager_exec* e;
- MYSQL_RES* res=0;
- MYSQL_ROW row;
- MYSQL_FIELD* fields;
- int num_fields,i,ident_len;
- char* ident,*query;
- query=ident=args_start;
- while (!my_isspace(cs,*query))
- query++;
- if (query == ident)
- {
- error="Missing server identifier";
- goto err;
- }
- ident_len=(int)(query-ident);
- while (query<args_end && my_isspace(cs,*query))
- query++;
- if (query == args_end)
- {
- error="Missing query";
- goto err;
- }
- pthread_mutex_lock(&lock_exec_hash);
- if (!(e=(struct manager_exec*)hash_search(&exec_hash,ident,
- ident_len)))
- {
- pthread_mutex_unlock(&lock_exec_hash);
- error="Exec definition entry does not exist";
- goto err;
- }
- pthread_mutex_unlock(&lock_exec_hash);
- pthread_mutex_lock(&e->lock);
- if (!e->pid)
- {
- error="Process is not running";
- pthread_mutex_unlock(&e->lock);
- goto err;
- }
- if (mysql_query(&e->mysql,query))
- {
- error=mysql_error(&e->mysql);
- pthread_mutex_unlock(&e->lock);
- goto err;
- }
- if ((res=mysql_store_result(&e->mysql)))
- {
- char buf[MAX_CLIENT_MSG_LEN],*p,*buf_end;
- fields=mysql_fetch_fields(res);
- num_fields=mysql_num_fields(res);
- p=buf;
- buf_end=buf+sizeof(buf);
- for (i=0;i<num_fields && p<buf_end-2;i++)
- {
- p=arg_strmov(p,fields[i].name,buf_end-p-2);
- *p++='t';
- }
- *p=0;
- client_msg_pre(&thd->net,MANAGER_OK,buf);
- while ((row=mysql_fetch_row(res)))
- {
- p=buf;
- for (i=0;i<num_fields && p<buf_end-2;i++)
- {
- p=arg_strmov(p,row[i],buf_end-p-2);
- *p++='t';
- }
- *p=0;
- client_msg_pre(&thd->net,MANAGER_OK,buf);
- }
- }
- pthread_mutex_unlock(&e->lock);
- client_msg(&thd->net,MANAGER_OK,"End");
- return 0;
- err:
- client_msg(&thd->net,MANAGER_CLIENT_ERR,error);
- return 1;
- }
- HANDLE_DECL(handle_def_exec)
- {
- struct manager_exec* e=0,*old_e;
- const char* error=0;
- if (!(e=manager_exec_new(args_start,args_end)))
- {
- error="Out of memory";
- goto err;
- }
- if (e->error)
- {
- error=e->error;
- goto err;
- }
- pthread_mutex_lock(&lock_exec_hash);
- if ((old_e=(struct manager_exec*)hash_search(&exec_hash,(byte*)e->ident,
- e->ident_len)))
- {
- strnmov(e->stdout_path,old_e->stdout_path,sizeof(e->stdout_path));
- strnmov(e->stderr_path,old_e->stderr_path,sizeof(e->stderr_path));
- strnmov(e->con_user,old_e->con_user,sizeof(e->con_user));
- strnmov(e->con_host,old_e->con_host,sizeof(e->con_host));
- strnmov(e->con_sock,old_e->con_sock,sizeof(e->con_sock));
- e->con_port=old_e->con_port;
- update_req_len(e);
- hash_delete(&exec_hash,(byte*)old_e);
- }
- my_hash_insert(&exec_hash,(byte*)e);
- pthread_mutex_unlock(&lock_exec_hash);
- client_msg(&thd->net,MANAGER_OK,"Exec definition created");
- return 0;
- err:
- client_msg(&thd->net,MANAGER_CLIENT_ERR,error);
- if (e)
- manager_exec_free(e);
- return 1;
- }
- HANDLE_NOARG_DECL(handle_show_exec)
- {
- uint i;
- client_msg_pre(&thd->net,MANAGER_INFO,"Exec_deftPidtExit_statustCon_info
- tStdouttStderrtArguments");
- pthread_mutex_lock(&lock_exec_hash);
- for (i=0;i<exec_hash.records;i++)
- {
- struct manager_exec* e=(struct manager_exec*)hash_element(&exec_hash,i);
- manager_exec_print(&thd->net,e);
- }
- pthread_mutex_unlock(&lock_exec_hash);
- client_msg(&thd->net,MANAGER_INFO,"End");
- return 0;
- }
- static struct manager_exec* manager_exec_by_pid(pid_t pid)
- {
- struct manager_exec* e;
- uint i;
- pthread_mutex_lock(&lock_exec_hash);
- for (i=0;i<exec_hash.records;i++)
- {
- e=(struct manager_exec*)hash_element(&exec_hash,i);
- if (e->pid==pid)
- {
- pthread_mutex_unlock(&lock_exec_hash);
- return e;
- }
- }
- pthread_mutex_unlock(&lock_exec_hash);
- return 0;
- }
- static void manager_exec_connect(struct manager_exec* e)
- {
- int i;
- int connect_retries;
- if (!(connect_retries=e->start_wait_timeout))
- connect_retries=manager_connect_retries;
- for (i=0;i<connect_retries;i++)
- {
- if (mysql_real_connect(&e->mysql,e->con_host,e->con_user,e->con_pass,0,
- e->con_port,e->con_sock,0))
- return;
- sleep(1);
- }
- e->error="Could not connect to MySQL server withing the number of tries";
- }
- static int manager_exec_launch(struct manager_exec* e)
- {
- if (one_thread)
- {
- pid_t tmp_pid;
- switch ((tmp_pid=fork())) {
- case -1:
- e->error="Cannot fork";
- return 1;
- case 0:
- {
- int err_code;
- close(manager_sock);
- err_code=execv(e->bin_path,e->args);
- exit(err_code);
- }
- default:
- e->pid=tmp_pid;
- manager_exec_connect(e);
- return 0;
- }
- }
- else
- {
- if (my_write(to_launcher_pipe[1],(byte*)&e->req_len,
- sizeof(int),MYF(MY_NABP))||
- my_write(to_launcher_pipe[1],(byte*)&e->num_args,
- sizeof(int),MYF(MY_NABP)) ||
- my_write(to_launcher_pipe[1],e->stdout_path,e->stdout_path_size,
- MYF(MY_NABP)) ||
- my_write(to_launcher_pipe[1],e->stderr_path,e->stderr_path_size,
- MYF(MY_NABP)) ||
- my_write(to_launcher_pipe[1],e->data_buf,e->data_buf_size,
- MYF(MY_NABP)))
- {
- e->error="Failed write request to launcher";
- return 1;
- }
- }
- return 0;
- }
- static char* arg_strmov(char* dest, const char* src, int n)
- {
- char* dest_end = dest+n-1;
- char c;
- for (;dest<dest_end && (c=*src++);)
- {
- if (c=='%')
- *dest++='%';
- *dest++=c;
- }
- return dest;
- }
- static void manager_exec_print(NET* net,struct manager_exec* e)
- {
- char buf[MAX_MYSQL_MANAGER_MSG];
- char* p=buf,*buf_end=buf+sizeof(buf)-1;
- char** args=e->args;
- p=arg_strmov(p,e->ident,(int)(buf_end-p)-1);
- *p++='t';
- if (p>buf_end-15)
- goto end;
- p=int10_to_str(e->pid,p,10);
- *p++='t';
- p=int10_to_str(e->exit_code,p,10);
- *p++='t';
- p=arg_strmov(p,e->con_user,(int)(buf_end-p)-1);
- *p++='@';
- if (p==buf_end)
- goto end;
- p=arg_strmov(p,e->con_host,(int)(buf_end-p)-11);
- *p++=':';
- if (p==buf_end-10)
- goto end;
- if (e->con_sock[0])
- {
- p=arg_strmov(p,e->con_sock,(int)(buf_end-p)-1);
- }
- else
- {
- p=int10_to_str(e->con_port,p,10);
- }
- *p++='t';
- p=arg_strmov(p,e->stdout_path,(int)(buf_end-p)-1);
- if (p==buf_end-1)
- goto end;
- *p++='t';
- p=arg_strmov(p,e->stderr_path,(int)(buf_end-p)-1);
- if (p==buf_end-1)
- goto end;
- *p++='t';
- for (;p<buf_end && *args;args++)
- {
- p=arg_strmov(p,*args,(int)(buf_end-p)-1);
- *p++='t';
- }
- end:
- *p=0;
- client_msg_pre(net,MANAGER_INFO,buf);
- return;
- }
- static int authenticate(struct manager_thd* thd)
- {
- char* buf_end,*buf,*p,*p_end;
- my_MD5_CTX context;
- uchar digest[MD5_LEN];
- struct manager_user* u;
- char c;
- client_msg(&thd->net,MANAGER_INFO, manager_greeting);
- if (!(buf_end=read_line(thd)))
- return -1;
- for (buf=thd->cmd_buf,p=thd->user,p_end=p+MAX_USER_NAME;
- buf<buf_end && (c=*buf) && p<p_end; buf++,p++)
- {
- if (my_isspace(cs,c))
- {
- *p=0;
- break;
- }
- else
- *p=c;
- }
- if (p==p_end || buf==buf_end)
- return 1;
- if (!(u=(struct manager_user*)hash_search(&user_hash,thd->user,
- (uint)(p-thd->user))))
- return 1;
- for (;my_isspace(cs,*buf) && buf<buf_end;buf++) /* empty */;
- my_MD5Init(&context);
- my_MD5Update(&context,(uchar*) buf,(uint)(buf_end-buf));
- my_MD5Final(digest,&context);
- if (memcmp(u->md5_pass,digest,MD5_LEN))
- return 1;
- client_msg(&thd->net,MANAGER_OK,"OK");
- return 0;
- }
- static void print_time(FILE* fp)
- {
- struct tm now;
- time_t t;
- time(&t);
- localtime_r(&t,&now);
- fprintf(fp,"[%d-%02d-%02d %02d:%02d:%02d] ", now.tm_year+1900,
- now.tm_mon+1,now.tm_mday,now.tm_hour,now.tm_min,
- now.tm_sec);
- }
- static void die(const char* fmt, ...)
- {
- va_list args;
- va_start(args,fmt);
- if (fmt)
- {
- if (errfp==stderr)
- fprintf(errfp, "%s: ", my_progname);
- else
- {
- print_time(errfp);
- fprintf(errfp,"Fatal error: ");
- }
- vfprintf(errfp, fmt, args);
- if (errno)
- fprintf(errfp, " errno=%d", errno);
- fprintf(errfp, "n");
- fflush(errfp);
- }
- va_end(args);
- clean_up();
- exit(1);
- }
- void print_msg_type(int msg_type)
- {
- const char* msg;
- switch (msg_type) {
- case LOG_ERR: msg = "ERROR"; break;
- case LOG_WARN: msg = "WARNING"; break;
- case LOG_INFO: msg = "INFO"; break;
- #ifndef DBUG_OFF
- case LOG_DEBUG: msg = "DEBUG"; break;
- #endif
- default: msg = "UNKNOWN TYPE"; break;
- }
- fprintf(errfp," %s: ", msg);
- }
- static void log_msg(const char* fmt, int msg_type, va_list args)
- {
- pthread_mutex_lock(&lock_log);
- print_time(errfp);
- print_msg_type(msg_type);
- vfprintf(errfp,fmt,args);
- fputc('n',errfp);
- fflush(errfp);
- pthread_mutex_unlock(&lock_log);
- }
- static pthread_handler_decl(process_launcher_messages,
- args __attribute__((unused)))
- {
- my_thread_init();
- for (;!in_shutdown;)
- {
- pid_t pid;
- struct manager_exec* e;
- char buf[MAX_LAUNCHER_MSG];
- if (read(from_launcher_pipe[0],buf,MAX_LAUNCHER_MSG)<0)
- {
- log_err("error reading launcher message");
- sleep(1);
- continue;
- }
- switch (buf[0]) {
- case CHILD_START:
- {
- char* ident=buf+1;
- int ident_len=strlen(ident);
- memcpy(&pid,ident+ident_len+1,sizeof(pid));
- log_debug("process message - ident=%s ident_len=%d pid=%d",ident,
- ident_len,pid);
- pthread_mutex_lock(&lock_exec_hash);
- log_debug("hash has %d records",exec_hash.records);
- e=(struct manager_exec*)hash_search(&exec_hash,ident,ident_len);
- if (e)
- {
- pthread_mutex_lock(&e->lock);
- e->pid=pid;
- pthread_cond_broadcast(&e->cond);
- pthread_mutex_unlock(&e->lock);
- }
- pthread_mutex_unlock(&lock_exec_hash);
- log_debug("unlocked mutex");
- break;
- }
- case CHILD_STOP:
- memcpy(&pid,buf+1,sizeof(pid));
- e=manager_exec_by_pid(pid);
- if (e)
- {
- pthread_mutex_lock(&e->lock);
- e->pid=0;
- memcpy(&e->exit_code,buf+1+sizeof(pid),sizeof(int));
- pthread_cond_broadcast(&e->cond);
- pthread_mutex_unlock(&e->lock);
- }
- break;
- default:
- log_err("Got invalid launcher message");
- break;
- }
- }
- return 0;
- }
- static pthread_handler_decl(process_connection,arg)
- {
- struct manager_thd* thd = (struct manager_thd*)arg;
- my_thread_init();
- pthread_detach_this_thread();
- for (;!thd->finished;)
- {
- char* buf_end;
- if ((!(buf_end=read_line(thd)) || exec_line(thd,thd->cmd_buf,buf_end))
- && thd->fatal)
- {
- log_err("Thread aborted");
- break;
- }
- }
- manager_thd_free(thd);
- pthread_exit(0);
- return 0; /* Don't get cc warning */
- }
- static int client_msg_raw(NET* net, int err_code, int pre, const char* fmt,
- va_list args)
- {
- char buf[MAX_CLIENT_MSG_LEN],*p,*buf_end;
- p=buf;
- buf_end=buf+sizeof(buf);
- p=int10_to_str(err_code,p,10);
- if (pre)
- *p++='-';
- *p++=' ';
- p+=my_vsnprintf(p,buf_end-p,fmt,args);
- if (p>buf_end-2)
- p=buf_end - 2;
- *p++='r';
- *p++='n';
- log_debug("message to client: %-.*s",p-buf-2,buf);
- if (my_net_write(net,buf,(uint)(p-buf)) || net_flush(net))
- {
- p[-2]=0;
- log_err("Failed writing '%s' to client: errno=%d",buf,errno);
- net_end(net);
- return 1;
- }
- return 0;
- }
- static int client_msg(NET* net, int err_code, const char* fmt, ...)
- {
- va_list args;
- va_start(args,fmt);
- return client_msg_raw(net,err_code,0,fmt,args);
- }
- static int client_msg_pre(NET* net, int err_code, const char* fmt, ...)
- {
- va_list args;
- va_start(args,fmt);
- return client_msg_raw(net,err_code,1,fmt,args);
- }
- static char* read_line(struct manager_thd* thd)
- {
- int len;
- char* p, *buf_end;
- if ((len=my_net_read(&thd->net)) == (int)packet_error || !len)
- {
- log_err("Error reading command from client (Error: %d)",
- errno);
- thd->fatal=1;
- return 0;
- }
- buf_end=thd->cmd_buf+len;
- for (p=thd->cmd_buf;p<buf_end;p++)
- if (*p == 'r' || *p == 'n')
- {
- *p=0;
- break;
- }
- return p;
- }
- static void handle_child(int __attribute__((unused)) sig)
- {
- pid_t child;
- int child_status;
- for (;(child=waitpid(-1,&child_status,WNOHANG))>0;)
- {
- char msg_buf[1+sizeof(int)+sizeof(int)];
- msg_buf[0]=CHILD_STOP;
- memcpy(msg_buf+1,&child,sizeof(int));
- memcpy(msg_buf+1+sizeof(int),&child_status,sizeof(int));
- if (write(from_launcher_pipe[1],msg_buf,sizeof(msg_buf))!=sizeof(msg_buf))
- log_err("launcher: error writing message on child exit");
- }
- signal(SIGCHLD,handle_child);
- }
- static struct manager_thd* manager_thd_new(Vio* vio)
- {
- struct manager_thd* tmp;
- if (!(tmp=(struct manager_thd*)my_malloc(sizeof(*tmp),
- MYF(0))))
- {
- log_err("Out of memory in manager_thd_new");
- return 0;
- }
- my_net_init(&tmp->net,vio);
- tmp->user[0]=0;
- tmp->priv_flags=0;
- tmp->fatal=tmp->finished=0;
- tmp->cmd_buf= (char*) tmp->net.read_pos;
- return tmp;
- }
- static void manager_thd_free(struct manager_thd* thd)
- {
- NET* net=&thd->net;
- if (net->vio)
- {
- vio_delete(net->vio);
- net->vio=0;
- }
- net_end(&thd->net);
- }
- static void clean_up()
- {
- pthread_mutex_lock(&lock_shutdown);
- if (in_shutdown)
- {
- pthread_mutex_unlock(&lock_shutdown);
- return;
- }
- in_shutdown = 1;
- pthread_mutex_unlock(&lock_shutdown);
- log_info("Shutdown started");
- if (manager_sock)
- close(manager_sock);
- log_info("Ended");
- if (errfp != stderr)
- my_fclose(errfp, MYF(0));
- hash_free(&exec_hash);
- if (created_pid_file)
- my_delete(pid_file, MYF(0));
- }
- static void print_version(void)
- {
- printf("%s Ver %s Distrib %s, for %s (%s)n",my_progname,MANAGER_VERSION,
- MYSQL_SERVER_VERSION,SYSTEM_TYPE,MACHINE_TYPE);
- }
- static void usage()
- {
- print_version();
- printf("MySQL AB, by Sashan");
- printf("This software comes with ABSOLUTELY NO WARRANTYnn");
- printf("Manages instances of MySQL server.nn");
- printf("Usage: %s [OPTIONS]nn", my_progname);
- my_print_help(my_long_options);
- my_print_variables(my_long_options);
- }
- static my_bool
- get_one_option(int optid, const struct my_option *opt __attribute__((unused)),
- char *argument)
- {
- switch (optid) {
- case '#':
- DBUG_PUSH(argument ? argument : "d:t:O,/tmp/mysqlmgrd.trace");
- break;
- case 'V':
- print_version();
- exit(0);
- case '?':
- usage();
- exit(0);
- }
- return 0;
- }
- static int parse_args(int argc, char **argv)
- {
- int ho_error;
-
- if ((ho_error=handle_options(&argc, &argv, my_long_options, get_one_option)))
- exit(ho_error);
- return 0;
- }
- static int init_server()
- {
- int arg=1;
- log_info("Started");
- if ((manager_sock=socket(PF_INET,SOCK_STREAM,0)) < 0)
- die("Could not create socket");
- bzero((char*) &manager_addr, sizeof(manager_addr));
- manager_addr.sin_family = AF_INET;
- manager_addr.sin_addr.s_addr = manager_bind_addr;
- manager_addr.sin_port = htons(manager_port);
- setsockopt(manager_sock,SOL_SOCKET, SO_REUSEADDR,(char*)&arg,sizeof(arg));
- if (bind(manager_sock,(struct sockaddr*)&manager_addr, sizeof(manager_addr))
- < 0)
- die("Could not bind");
- if (listen(manager_sock,manager_back_log) < 0)
- die("Could not listen");
- return 0;
- }
- static int run_server_loop()
- {
- pthread_t th;
- struct manager_thd *thd;
- int client_sock;
- Vio* vio;
- pthread_attr_t thr_attr;
- (void) pthread_attr_init(&thr_attr);
- #if !defined(HAVE_DEC_3_2_THREADS)
- pthread_attr_setscope(&thr_attr,PTHREAD_SCOPE_SYSTEM);
- (void) pthread_attr_setdetachstate(&thr_attr,PTHREAD_CREATE_DETACHED);
- #endif
- for (;!shutdown_requested;)
- {
- size_socket len=sizeof(struct sockaddr_in);
- if ((client_sock=accept(manager_sock,(struct sockaddr*)&manager_addr,
- &len)) <0)
- {
- if (shutdown_requested)
- break;
- if (errno != EAGAIN)
- {
- log_warn("Error in accept, errno=%d", errno);
- sleep(1); /* avoid tying up CPU if accept is broken */
- }
- continue;
- }
- if (shutdown_requested)
- break;
- if (!(vio=vio_new(client_sock,VIO_TYPE_TCPIP,FALSE)))
- {
- log_err("Could not create I/O object");
- close(client_sock);
- continue;
- }
- if (!(thd=manager_thd_new(vio)))
- {
- log_err("Could not create thread object");
- vio_close(vio);
- continue;
- }
- if (authenticate(thd))
- {
- client_msg(&thd->net,MANAGER_ACCESS, "Access denied");
- manager_thd_free(thd);
- log_info("Client failed to authenticate");
- continue;
- }
- if (shutdown_requested)
- {
- manager_thd_free(thd);
- break;
- }
- if (one_thread)
- {
- process_connection((void*)thd);
- manager_thd_free(thd);
- continue;
- }
- else if (pthread_create(&th,&thr_attr,process_connection,(void*)thd))
- {
- client_msg(&thd->net,MANAGER_INTERNAL_ERR,
- "Could not create thread, errno=%d",
- errno);
- manager_thd_free(thd);
- continue;
- }
- }
- (void) pthread_attr_destroy(&thr_attr);
- return 0;
- }
- static FILE* open_log_stream()
- {
- FILE* fp;
- if (!(fp=my_fopen(manager_log_file, O_APPEND | FILE_BINARY, MYF(MY_WME))))
- {
- clean_up();
- exit(1);
- }
- return fp;
- }
- static byte* get_user_key(const byte* u, uint* len,
- my_bool __attribute__((unused)) t)
- {
- register const char* key;
- key = ((struct manager_user*)u)->user;
- *len = ((struct manager_user*)u)->user_len;
- return (byte*)key;
- }
- static byte* get_exec_key(const byte* e, uint* len,
- my_bool __attribute__((unused)) t)
- {
- register const char* key;
- key = ((struct manager_exec*)e)->ident;
- *len = ((struct manager_exec*)e)->ident_len;
- return (byte*)key;
- }
- static void init_arg_array(char* arg_str,char** args,uint arg_count)
- {
- char* p = arg_str;
- for (;arg_count>0;arg_count--)
- {
- *args++=p;
- p += strlen(p)+1;
- }
- *args=0;
- }
- static uint tokenize_args(char* arg_start,char** arg_end)
- {
- char* p, *p_write,*p_end;
- uint arg_count=0;
- int quoted=0,escaped=0,last_space=0;
- p_end=*arg_end;
- p_write=p=arg_start;
- for (; p < p_end ; p++)
- {
- char c = *p;
- switch (c) {
- case ' ':
- case 'r':
- case 'n':
- if (!quoted)
- {
- if (!last_space)
- {
- *p_write++=0;
- arg_count++;
- last_space=1;
- }
- }
- else
- *p_write++=c;
- escaped=0;
- break;
- case '"':
- if (!escaped)
- quoted=!quoted;
- else
- *p_write++=c;
- last_space=0;
- escaped=0;
- break;
- case '\':
- if (!escaped)
- escaped=1;
- else
- {
- *p_write++=c;
- escaped=0;
- }
- last_space=0;
- break;
- default:
- escaped=last_space=0;
- *p_write++=c;
- break;
- }
- }
- if (!last_space && p_write>arg_start)
- arg_count++;
- *p_write=0;
- *arg_end=p_write;
- log_debug("arg_count: %d arg_start: '%s'",arg_count,arg_start);
- return arg_count;
- }
- static void update_req_len(struct manager_exec* e)
- {
- e->req_len=(e->data_buf_size+
- (e->stdout_path_size=strlen(e->stdout_path)+1)+
- (e->stderr_path_size=strlen(e->stderr_path)+1));
- }
- static struct manager_exec* manager_exec_new(char* arg_start,char* arg_end)
- {
- struct manager_exec* tmp;
- char* first_arg;
- uint arg_len,num_args;
- num_args=tokenize_args(arg_start,&arg_end);
- arg_len=(uint)(arg_end-arg_start)+1; /* include