Mar 19, 2018 · ftruncate() is also a standard POSIX function and is portable. Note that POSIX does not specify how an OS sets the file length, such as whether or not a file set to any length …

Nov 7, 2014 · I want to use ftruncate function in my code. I have to compile with option std=c99. I get warning: In function ‘test’: warning: implicit declaration of function ‘ftruncate’ [-Wimplicit …

Mar 26, 2018 · For more information, see ftruncate(3). However, it might be the case that you are confused because you are trying to use a POSIX function instead of C or C++ standard ones. …

I'm using C to write some data to a file. I want to erase the previous text written in the file in case it was longer than what I'm writing now. I want to decrease the size of file or truncate unti...

Dec 7, 2012 · Note that ftruncate() operates on a POSIX file descriptor (despite its potentially misleading name), not a STDIO stream FILE handle. Note also that mixing operations on the …

Nov 12, 2013 · Just #define ftruncate _chsize_s. (Use _chsize_s() with a 64-bit offset parameter, as opposed to _chsize() ...

Oct 12, 2016 · Under Unix, this is ftruncate. But you'll need to find the byte count where you want to truncate first; ftruncate requires an open file, but it won't truncate at the current position in …

Sep 12, 2017 · man ftruncate tells me that you need. #include <unistd.h> #include <sys/types.h> Try including these before including boost interprocess headers. If then still it fails to recognize …

I ran npm config set prefix /usr/local After running that command, When trying to run any npm commands on Windows OS I keep getting the below. Error: EPERM: operation not permitted, …

Sep 28, 2011 · Use ftruncate to truncate your file, it just requires the file descriptor and a size. Then later you can use fstat to query the properties of the underlying file and use the size you …