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wcsncpy(3) — Linux manual page

wcsncpy(3)               Library Functions Manualwcsncpy(3)

NAME        top

       wcsncpy - copy a fixed-size string of wide characters

LIBRARY        top

       Standard C library (libc,-lc)

SYNOPSIS        top

#include <wchar.h>wchar_t *wcsncpy(size_t n;wchar_tdest[restrictn],const wchar_t *restrictsrc,size_tn);

DESCRIPTION        top

       Thewcsncpy() function is the wide-character equivalent of thestrncpy(3) function.  It copies at mostn wide characters from the       wide-character string pointed to bysrc, including the terminating       null wide character (L'\0'), to the array pointed to bydest.       Exactlyn wide characters are written atdest.  If the lengthwcslen(src) is smaller thann, the remaining wide characters in       the array pointed to bydest are filled with null wide characters.       If the lengthwcslen(src) is greater than or equal ton, the       string pointed to bydest will not be terminated by a null wide       character.       The strings may not overlap.       The programmer must ensure that there is room for at leastn wide       characters atdest.

RETURN VALUE        top

wcsncpy() returnsdest.

ATTRIBUTES        top

       For an explanation of the terms used in this section, seeattributes(7).       ┌──────────────────────────────────────┬───────────────┬─────────┐       │Interface│Attribute│Value│       ├──────────────────────────────────────┼───────────────┼─────────┤       │wcsncpy()                            │ Thread safety │ MT-Safe │       └──────────────────────────────────────┴───────────────┴─────────┘

STANDARDS        top

       C11, POSIX.1-2008.

HISTORY        top

       POSIX.1-2001, C99.

SEE ALSO        top

strncpy(3)

COLOPHON        top

       This page is part of theman-pages (Linux kernel and C library       user-space interface documentation) project.  Information about       the project can be found at        ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report       for this manual page, see       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.       This page was obtained from the tarball man-pages-6.15.tar.gz       fetched from       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on       2025-08-11.  If you discover any rendering problems in this HTML       version of the page, or you believe there is a better or more up-       to-date source for the page, or you have corrections or       improvements to the information in this COLOPHON (which isnot       part of the original manual page), send a mail to       man-pages@man7.orgLinux man-pages 6.15            2025-06-28wcsncpy(3)

Pages that refer to this page:wcpncpy(3), signal-safety(7)

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