systems-programming

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Using the stdout and stdin with System.IO.runCommand

I am trying to capture the stdin and stdout from runProcess into a string for analysis. However, setting up the handles seems to be rather difficult.I wandered into GHC.IO.Handle, and that seems to b[详细]

2023-04-10 13:21 分类：问答
How to get the exit code of a system process?

Say I want to execute the command unrar x archivename from within Haskell. What is the best way to do it and how do I get the exit code of 开发者_Python百科the command? If the command exited successf[详细]

2023-03-31 05:31 分类：问答
Why does this program print "forked!" 4 times?

Why does this program print “forked!” 4 times? #include <stdio.h> #include <unistd开发者_运维技巧.h>[详细]

2023-03-28 21:34 分类：问答
How to get information from device manager?

How can I, in my C# applictation, read specific information about a device? I have tried开发者_JAVA百科 WMI and it does not provide the information that I need.[详细]

2023-03-26 01:23 分类：问答
How to know which file is opening in Computer using C#

I want to know the file name which we are opening. For example: If we are opening notepad.exe then my program should display that notepad.exe g开发者_Go百科ot opened.[详细]

2023-03-24 06:12 分类：问答
Implementing an N process barrier using semaphores

I\'m currently training for an OS exam with previous iterations and I came across this: Implement a "N Process Barrier", that[详细]

2023-03-12 06:57 分类：问答
c fork,exec,getpid problem

I\'m new to c language and Linux. I have a problem related to fork(),getpid()and exec()function. I wrote a c program using fork() call the code of my program is following\"[详细]

2023-03-10 02:57 分类：问答
Why is sequentially reading a large file row by row with mmap and madvise sequential slower than fgets?

Overview I have aprogram bounded significantly by IO and am trying to speed it up. Using mmap seemed to be a good idea, but it actually degrades the performance relative to just using a series of fge[详细]

2023-03-06 19:10 分类：问答
Cannot step into system call source code

I have compiled my freebsd libc source with -g option, so that now I can step in into libc functions.[详细]

2023-03-06 01:26 分类：问答
glibc documentation and endianness

glibc documentation on process com开发者_如何学编程pletion status states that the macro WEXITSTATUS returns the low order 8 bytes of the completion status.[详细]

2023-03-04 06:15 分类：问答