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stpncpy(3)


NAME

   stpncpy - copy a fixed-size string, returning a pointer to its end

SYNOPSIS

   #include <string.h>

   char *stpncpy(char *dest, const char *src, size_t n);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

   stpncpy():
       Since glibc 2.10:
           _POSIX_C_SOURCE >= 200809L
       Before glibc 2.10:
           _GNU_SOURCE

DESCRIPTION

   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  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 dest.

RETURN VALUE

   stpncpy() returns a pointer to the terminating null byte in  dest,  or,
   if dest is not null-terminated, dest+n.

ATTRIBUTES

   For   an   explanation   of   the  terms  used  in  this  section,  see
   attributes(7).

   
   Interface  Attribute      Value   
   
   stpncpy()  Thread safety  MT-Safe

CONFORMING TO

   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.

SEE ALSO

   strncpy(3), wcpncpy(3)

COLOPHON

   This page is part of release 4.09 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/.



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