char *stpncpy(char *dest, const char *src, size_t n);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
Since glibc 2.10:
_XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
Before glibc 2.10:
The stpncpy() function copies at most n characters from the string
pointed to by src, including the terminating null byte ('\0'), to the
array pointed to by dest. Exactly n characters are written at dest.
If the length strlen(src) is smaller than n, the remaining characters
in the array pointed to by dest are filled with null bytes ('\0'), If
the length strlen(src) is greater or equal to n, the string pointed to
by dest will not be null-terminated.
The strings may not overlap.
The programmer must ensure that there is room for at least n characters
stpncpy() returns a pointer to the terminating null byte in dest, or,
if dest is not null-terminated, dest + n.
This function was added to POSIX.1-2008. Before that, it was a GNU
This page is part of release 3.35 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can
be found at http://man7.org/linux/man-pages/.
GNU 2011-09-28 STPNCPY(3)
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