COPY_FROM_USER - Online Linux Manual PageSection : 9
Updated : June 2018
Source : Kernel Hackers Manual 2.6.
Note : Memory Management in Linux
NAMEcopy_from_user − Copy a block of data from user space.
SYNOPSISunsigned long copy_from_user(void * to, const void __user * from, unsigned long n);
ARGUMENTSto Destination address, in kernel space. from Source address, in user space. n Number of bytes to copy.
CONTEXTUser context only. This function may sleep.
DESCRIPTIONCopy data from user space to kernel space. Returns number of bytes that could not be copied. On success, this will be zero. If some data could not be copied, this function will pad the copied data to the requested size using zero bytes.
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Online Linux Manual Page : Version : Online Linux Manual Page - Fedora.40 - march=x86-64 - mtune=generic - 24.12.29
Online Linux Manual Page : Library : lib_c - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
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