如何在odbcinst -j中编辑路径

当我看到odbcinst -j它显示

unixODBC 2.2.14
DRIVERS............: /etc/unixODBC/odbcinst.ini
SYSTEM DATA SOURCES: /etc/unixODBC/odbc.ini
FILE DATA SOURCES..: /etc/unixODBC/ODBCDataSources
USER DATA SOURCES..: /etc/unixODBC/odbc.ini
SQLULEN Size.......: 8
SQLLEN Size........: 8
SQLSETPOSIROW Size.: 8

但是没有位置/etc/unixODBC/odbcinst.ini.实际位置是/etc/odbcinst.ini这样我需要改变位置.我该怎么做？

我正试图在脚本下面运行

import pyodbc 
cnxn = pyodbc.connect('DRIVER={SQLServer};SERVER=10.10.10.1;DATABASE=ABC;UID=username;PWD=password')
cursor = cnxn.cursor()

但它显示以下错误

 pyodbc.Error: ('IM002', '[IM002] [unixODBC][Driver Manager]Data source name not found, and no default driver specified (0) (SQLDriverConnect)')

我添加了odbc.in和odbcinst.ini文件信息如下

cat odbc.ini
[SQLServer]
Description     = ODBC for MSSQL
Driver          = /usr/lib/x86_64-linux-gnu/odbc/libodbcmyS.so
Servername      = 
Database        = 
UID             = 
Port            = 1433

cat /etc/odbcinst.ini
[SQLServer]
Description     = ODBC for MSSQL
Driver          = /usr/lib/x86_64-linux-gnu/odbc/libodbcmyS.so
Setup           = /usr/lib/x86_64-linux-gnu/odbc/libmyodbc.so
UsageCount      = 1
FileUsage       = 1

我希望问题在于,odbcinst -j当我显示它时显示错误的路径.我不知道该怎么解决.

看起来"默认"路径未正确设置.
我很确定你已经在不同的地方提到了它,但我想提醒你应该设置正确的环境变量,如下面的链接所述:
http ://www.raosoft.com/ezsurvey /help/2007/odbc_in_unix.html http://gemfirexd.docs.pivotal.io/1.3.0/userguide/developers_guide/topics/odbc/install_config_odbc.html
这意味着在您的情况下,您可以添加几行您.bashrc或者.bash_profile类似的,以便每次打开shell时程序都指向正确的位置.
那么要添加的行将是:

export ODBCINI=/etc/odbc.ini
export ODBCSYSINI=/etc

看一下unixODBC-2.2.14-p2包的源代码,调用odbcinst -j它时会在代码中经过以下分支

case 'j':
    PrintConfigInfo();
    exit(0);

和PrintConfigInfo()会做印刷一堆信息的工作,特别是你所看到的

void PrintConfigInfo()
{
    char szFileName[ODBC_FILENAME_MAX+1];
        char b1[ 256 ], b2[ 256 ];

    printf( "unixODBC " VERSION "\n" );

    *szFileName = '\0';
    sprintf( szFileName, "%s/odbcinst.ini", odbcinst_system_file_path( b1 ), odbcinst_system_file_name( b2 ));
    printf( "DRIVERS............: %s\n", szFileName );

    *szFileName = '\0';
    _odbcinst_SystemINI( szFileName, FALSE );
    printf( "SYSTEM DATA SOURCES: %s\n", szFileName );

    *szFileName = '\0';
    _odbcinst_FileINI( szFileName );
    printf( "FILE DATA SOURCES..: %s\n", szFileName );

    *szFileName = '\0';
    _odbcinst_UserINI( szFileName, FALSE );
    printf( "USER DATA SOURCES..: %s\n", szFileName );

    printf( "SQLULEN Size.......: %d\n", sizeof( SQLULEN ));
    printf( "SQLLEN Size........: %d\n", sizeof( SQLLEN ));
    printf( "SQLSETPOSIROW Size.: %d\n", sizeof( SQLSETPOSIROW ));
}  

现在让我们检查一个print语句,以了解它从哪里获取路径,让我们以例如该行为例

printf( "SYSTEM DATA SOURCES: %s\n", szFileName );

其中,szFileName由以下调用设置:

_odbcinst_SystemINI( szFileName, FALSE );  

在文件中定义odbcinst/_odbcinst_SystemINI.c:

BOOL _odbcinst_SystemINI( char *pszFileName, BOOL bVerify )
{
        FILE                    *hFile;
        char                    b1[ 256 ];

    sprintf( pszFileName, "%s/odbc.ini", odbcinst_system_file_path( b1 ));

        if ( bVerify )
        {
        /* try opening for read */
                hFile = uo_fopen( pszFileName, "r" );
                if ( hFile )
                        uo_fclose( hFile );
                else
        {
            /* does not exist so try creating it */
            hFile = uo_fopen( pszFileName, "w" );
            if ( hFile )
                uo_fclose( hFile );
            else
                return FALSE;
        }
        }

        return TRUE;
}

在哪里设置要在以下行中打印的字符串

sprintf( pszFileName, "%s/odbc.ini", odbcinst_system_file_path( b1 ));

要了解如何odbcinst_system_file_path( b1 )设置此路径,我们会查看源并找到它

  char *odbcinst_system_file_path( char *buffer )
{
    char *path;
    static char save_path[ 512 ];
    static int saved = 0;

    if ( saved ) {
            return save_path;
    }

    if (( path = getenv( "ODBCSYSINI" ))) {
                strcpy( buffer, path );
        strcpy( save_path, buffer );
        saved = 1;
        return buffer;
        }
#ifdef SYSTEM_FILE_PATH
    else {
        strcpy( save_path, SYSTEM_FILE_PATH );
        saved = 1;
        return SYSTEM_FILE_PATH;
        }
#else
    else {
        strcpy( save_path, "/etc" );
        saved = 1;
        return "/etc";
        }
#endif
}

你可以看到通过阅读环境变量getenv( "ODBCSYSINI" ).与其他人相似.现在,原始代码有另一个分支,但最终使用自定义函数做类似的事情.