stpncpy - copy a fixed-size string, returning a pointer to its end
#include <string.h> char * stpncpy (char * dest, char * src, size_t n);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
Since glibc 2.10: _POSIX_C_SOURCE >= 200809L Before glibc 2.10: _GNU_SOURCE
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
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 than 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 at
stpncpy() returns a pointer to the terminating null byte in
dest, or, if
dest is not null-terminated,
For an explanation of the terms used in this section, see attributes(7).
This function was added to POSIX.1-2008. Before that, it was a GNU extension. It first appeared in version 1.07 of the GNU C library in 1993.
This page is part of release 4.15 of the Linux
man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.