在Oracle运行操作系统命令

("Daemon error while executing:\n");
printf("%.*s\n", msg_length, msg_buffer);
printf("Daemon continuing.\n");
}
main()
{
EXEC SQL WHENEVER SQLERROR DO connect_error();
EXEC SQL CONNECT :uid;
printf("Daemon connected.\n");

EXEC SQL WHENEVER SQLERROR DO sql_error();
printf("Daemon waiting\n");
while (1) {
EXEC SQL EXECUTE
BEGIN
/*接收deamon发来的字符*/
:status := DBMS_PIPE.RECEIVE_MESSAGE(''''daemon'''');
IF :status = 0 THEN
/*取出字符*/
DBMS_PIPE.UNPACK_MESSAGE(:command);
END IF;
END;
END-EXEC;
IF (status == 0)
{
command.arr[command.len] = ''''\0'''';
/*如果是stop,该进程就退出*/
IF (!strcmp((char *) command.arr, "STOP"))
{
printf("Daemon exiting.\n");
break;
}

ELSE IF (!strcmp((char *) command.arr, "SYSTEM"))
{
EXEC SQL EXECUTE
BEGIN
DBMS_PIPE.UNPACK_MESSAGE(:return_name);
DBMS_PIPE.UNPACK_MESSAGE(:value);
END;
END-EXEC;
value.arr[value.len] = ''''\0'''';
printf("Will execute system command ''''%s''''\n", value.arr);
/*运行os命令*/
status = system(value.arr);
EXEC SQL EXECUTE
BEGIN
DBMS_PIPE.PACK_MESSAGE(''''done'''');
DBMS_PIPE.PACK_MESSAGE(:status);
:status := DBMS_PIPE.SEND_MESSAGE(:return_name);
END;
END-EXEC;

IF (status)
{
printf
("Daemon error while responding to system command.");
printf(" status: %d\n", status);
}
}
ELSE
{
printf
("Daemon error: invalid command ''''%s'''' received.\n",
command.arr);
}
}
ELSE
{
printf("Daemon error while waiting for signal.");
printf(" status = %d\n", status);
}
}
EXEC SQL COMMIT WORK RELEASE;
exit(0);
}
以上代码起名为daemon.pc,用proc预编译:

proc iname=daemon.pc userid=用户名/密码@服务名 sqlcheck=semantics

得到daemon.c,在用c进行编译,注意在NT上要把orasql8.lib加上,否则编译通过,连接没法通过.


3 在服务器上运行daemon.exe


4 在sqlplus运行测试语句:
SQL> variable rv number
SQL> execute :rv := DAEMON.EXECUTE_SYSTEM(''''ls -la'''');
PL/SQL 过程已成功完成。
SQL> execute :rv := DAEMON.EXECUTE_SYSTEM(''''dir'''');
PL/SQL 过程已成功完成。
SQL>