1STRNCPY_FROM_USER(9)      Memory Management in Linux      STRNCPY_FROM_USER(9)
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NAME

6       strncpy_from_user - Copy a NUL terminated string from userspace.
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SYNOPSIS

9       long strncpy_from_user(char * dst, const char __user * src,
10                              long count);
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ARGUMENTS

13       dst
14           Destination address, in kernel space. This buffer must be at least
15           count bytes long.
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17       src
18           Source address, in user space.
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20       count
21           Maximum number of bytes to copy, including the trailing NUL.
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DESCRIPTION

24       Copies a NUL-terminated string from userspace to kernel space.
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26       On success, returns the length of the string (not including the
27       trailing NUL).
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29       If access to userspace fails, returns -EFAULT (some data may have been
30       copied).
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32       If count is smaller than the length of the string, copies count bytes
33       and returns count.
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36Kernel Hackers Manual 2.6.         June 2019              STRNCPY_FROM_USER(9)
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