Linux Kernel - Check if a file descriptor is taken
- by NTek
In linux kernel programming, is there a way to check if a particular file descriptor is in use for a given process or if it's available?
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Linux Kernel - Get last written memory block
- by NTek
In the linux kernel, are there any data structures that automatically always hold the last written block number for a partition? I can't find any built-in kernel source that could be used to get this information. Any help is appreciated.Read the article
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C Pointer Question: &(*struct->struct)
- by NTek
I have a struct defined with the structure as follows (names are different) struct str1 { int field1; struct str2; } And I have a *str1 in a function. I'd like to get a pointer to str2. So I tried &(str1->str2) and was hoping this would return a pointer to str2. Is this incorrect? It doesn't seem to be working. How would I get a pointer to str2 if given a pointer to str1?Read the article
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Linux Kernel - Socket file descriptor close location
- by NTek
Where in the linux kernel does the closing of a socket's file descriptor occur? I know for a file, the file's file descriptor is closed in fs/open.cs function sys_close(). However, for a socket file descriptor, is this the same location or somewhere else? Also, do sockets utilize the file.c alloc_fd to allocate the file descriptor or do they utilize some other function?Read the article
