fcntl

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How to get hard disk serial number using Python

How can I get the serial number of a hard disk drive using Python on Linux? I would like to use a Python module to do that instead of running an external program such as hdparm.Pe开发者_开发知识库rha[详细]

2023-01-25 02:43 分类：问答
Ignoring comment lines marked with "%" using open() in C on linux

I am trying to read a file which has the first two lines marked with a \"%\" as the first character.I need to ign开发者_高级运维ore these two lines, and then read 4 separate integer variables, separat[详细]

2023-01-24 18:55 分类：问答
Having issues with flock() function

I have a question about how flock() works, particularly in python. I have a module that opens a serial connection (via os.open()). I need to make this thread safe. It\'s easy enough making it thread s[详细]

2023-01-20 04:29 分类：问答
Uninterruptible read/write calls

At some point during my C programming adventures on Linux, I encountered flags (possibly ioctl/fcntl?), that make reads and writes on a file descriptor uninterruptible.[详细]

2023-01-09 20:03 分类：问答
Utility that helps in file locking - expert tips wanted

I\'ve written a subclass of file that a) provides methods to conveniently lock it (using fcntl, so it only supports unix, which is however OK for me atm) and b) when reading or writing asserts that th[详细]

2022-12-31 20:24 分类：问答
Problems compiliing c++ code using cygwin

I am trying to compile some source code in cygwin (in windows 7) and get the following error when I run the make file[详细]

2022-12-31 15:08 分类：问答
Is O_NONBLOCK being set a property of the file descriptor or underlying file?

From what I have been reading on The Open Group website on fcntl, open, read, and write, I get the impression that whether O_NONBLOCK is set on a file descriptor, and hence whether non-blocking I/O is[详细]

2022-12-31 02:03 分类：问答
Shared mmap co-ordination using fcntl locks?

When using mmap() for shared memory (from Linux, or other UNIX-like systems) is it possible (and portable) to use fcntl() (or flock() or lockf() functions) to co-ordinate access to the mapping?[详细]

2022-12-30 00:52 分类：问答
what's the purpose of fcntl with parameter F_DUPFD

I　traced an oracle process, and find it first open a file /etc/netconfig as file handle 11, and then duplicate it as 256 by calling fcntl with parameter F_D开发者_运维百科UPFD, and then close the ori[详细]

2022-12-26 05:23 分类：问答
fcntl() for thread or process synchronization?

Is it possible to use fcntl() system call on a file to achieve thread/pro开发者_运维百科cess synchronization (instead of semaphoress)? Yes.Unix fcntl locks (and filesystem resources in general) are sy[详细]

2022-12-12 13:21 分类：问答