file-descriptor

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Check if file descriptor is valid

How do I check to see if a given file descriptor is valid? I want to write to fd=3 if it\'s available; otherwise, I want to write to stdout. I\'m aware that I could wrap every os.write call with try-e[详细]

2023-03-25 21:21 分类：问答
Filehandle issue with system call in C

In my C program I make a system call that executes the \'cat\' UNIX command, something like this. sprintf(command, \"cat %s\", filename);[详细]

2023-03-25 20:20 分类：问答
Command line tool to listen on several FIFOs at once

I am looking for a tool to read several FIFOs at once (probably using select(2)) and output what is read, closing the stream when all the FIFOs are closed. To be more precise, the program would behave[详细]

2023-03-23 06:10 分类：问答
Node.js : EBADF, Bad file descriptor

If I reload my application (from the browser with the reload button) a lots of times like 50 reload/10 seconds it gives me this error:[详细]

2023-03-20 08:50 分类：问答
Python logging fails when open file descriptor message encountered

I have the following Python code to create an lvm snapshot on a Linux machine. #!/usr/bin/env python3.1[详细]

2023-03-19 02:32 分类：问答
How to determining if other processes are using a file descriptor?

I\'m writing an application in C++ for a linux environment which will operate in a multi-process setup (i.e. the program calls fork()).As part of the application I am creating some file descriptors (s[详细]

2023-03-18 23:21 分类：问答
Finding open file descriptors for a process linux ( C code )?

I wanted to find all fds opened for a process in linux. Can 开发者_C百科I do it with glib library functions ?Here\'s some code I used to use, I didn\'t know about /proc/self (thx Donal!), but this wa[详细]

2023-03-17 04:20 分类：问答
sh: How do I avoid clobbering numbered file descriptors?

When I have exec 3>>file# file descriptor 3 now points to file [ $dryrun ] && exec 3>&1# or possibly to stdout[详细]

2023-03-16 07:20 分类：问答
lsof not giving o/p for bash built in read

When I do find / on a terminal and then do on another terminal lsof -a -d 0-2 -c fin I see o/p listed from execution of lsof command.[详细]

2023-03-14 01:50 分类：问答
Are STDIN_FILENO and STDOUT_FILENO read only in c?

fd = open(\"/dev/null\", O_RDWR); if (fd == -1) { ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, \"open(\\\"/dev/null\\\") failed\");[详细]

2023-03-10 02:25 分类：问答