在Windows中从SAS捕获stdout和stderr？

Question

我想从Windows上的另一个程序调用SAS程序。我有一些在批处理模式下从命令行调用SAS的经验，但没有真正的经验从它接收消息并处理这些消息。我搜索了很多关于从SAS程序中读取stdin的信息，但似乎无法弄清楚如何让我的SAS程序写出stdout或stderr。我可以在Windows中做到这一点吗？

从SAS程序，我想做到以下几点：

• 重定向警告信息和错误信息，而不是到stderr它们打印到日志文件
• 内SAS程序，手动检测错误和/或其他问题并将它们输出到stderr或stdout。

这是我曾尝试：

SAS

data test; 
    attrib i length=8; 

    do i = 1 to 10; 
     put 'putting'; *how can i make this go to stdout?; 
     putlog 'putting to log'; *this can go to the log - that is okay; 
     if i = 5 then do; 
      *pretend this is an error I am manually detecting - how can i make this go to stderr?; 
      put 'we found 5'; 
     end; 
     output; 
    end; 
run; 

data _null_; 

    1 = y; *this is an error detected by SAS. How can I make this go to stderr?; 

run; 

的Python调用SAS：

import subprocess 
import os 


if __name__ == '__main__': 

    filename = os.path.normpath(r'C:\Users\oob\Desktop\sas_python_test.sas') 
    sas_executable = os.path.normpath(r'C:\Program Files\SAS\SASFoundation\9.2\sas.exe') 

    cmd = r'"' + sas_executable + r'"' + " " + r'"' + filename + r'"' 

    p = subprocess.Popen(cmd,shell=False,stdout=subprocess.PIPE,stderr=subprocess.PIPE) 
    print p.communicate() 

我从这个控制台上的结果：

('', '') 

Answer 1

据我知道这是不可能直接实现。您可以通过使用-sysparm命令行参数将唯一文件名传入sas来模拟此操作，并将STDOUT输出保存到该文件中。然后可以使用-log命令行参数将sas日志发送到其他文件。一旦SAS程序完成，您将能够使用您选择的程序来解析每个生成的文件。不幸的是，日志文件被锁定，直到sas程序完成它，所以如果你想使用SAS来处理日志文件，你需要启动一个次要的后续程序来做到这一点。 （即，您无法从正在创建它的SAS程序中读取日志文件）。

一旦你阅读登录，你可以寻找以ERROR：或WARNING开头的行，并采取适当的行动（在我的情况下它会发送一封电子邮件给我）。你可能想要添加一些适合你编码风格的逻辑。例如，一些SAS认为是NOTES的东西我认为是ERRORS。此外，SAS将一些事情视为我不关心的错误。这是我使用的逻辑：

data problems log; 
    length line $1000; 

    infile "&logfile"; 
    input; 

    logfile = "&logfile"; 
    line_no = _n_; 
    line = _infile_; 
    problem = 0; 

    if 
    (
    line =: "ERROR:" 
    or line =: "WARNING:" 
    or line =: "NOTE: Numeric values have been converted to character values" 
    or line =: "NOTE: Character values have been converted to numeric values" 
    or line =: "NOTE: Missing values were generated as a result of performing an operation on missing values" 
    or line =: "NOTE: MERGE statement has more than one data set with repeats of BY values" 
    or line =: "NOTE: Invalid (or missing) arguments to the INTNX function have caused the function to return" 
    or line =: "INFO: Character variables have defaulted to a length of 200" 
    or line =: "NOTE: Invalid" 
) 
    and not 
    (
    line =: "WARNING: Your system is scheduled to expire" 
    or line =: "WARNING: The Base Product product with which Session Manager is associated" 
    or line =: "WARNING: will be expiring soon, and is currently in warning mode to indicate" 
    or line =: "WARNING: this upcoming expiration. Please run PROC SETINIT to obtain more" 
    or line =: "WARNING: information on your warning period." 
    or line =: "WARNING: This CREATE TABLE statement recursively references the target table. A consequence" 
    or line =: "WARNING: Unable to copy SASUSER registry to WORK registry. Because of this, you will not see registry customizations during this" 
    or line =: "WARNING: Estimates did not improve after a ridge was encountered in the objective function." 
    or line =: "WARNING: Estimates may not have converged." 
    or line =: "ERROR: A lock is not available for" 
    or line =: "ERROR: Errors printed on pages" 
) 
    then do; 
    problem = 1; 
    output problems; 
    end; 
    output log; 
run; 

希望这会有所帮助。

Answer 2

我没有SAS方便的Windows版本，但是在UNIX上我重定向到STDOUT这样的：

data _null_; 
    file STDOUT; 
    do i=1 to 10; 
    put i=; 
    end; 
run; 

不知道如何重定向错误日志STDERR，但打印到STDERR应该是这样的：

ods listing file=STDERR; 

proc print data=sashelp.class; 
run; 

Answer 3

Google搜索重定向日志STDERR你：

proc printto log=STDERR; 
    run; 

    data _null_; 
     1=x; 
    run;