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STPNCPY

Section: Linux Programmer's Manual (3)
Updated: 2015-03-02
Index Return to Main Contents
 

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:
_XOPEN_SOURCE >= 700 || _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 (aq\0aq), 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 (aq\0aq), 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).
InterfaceAttributeValue
stpncpy() Thread safetyMT-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 3.81 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 http://www.kernel.org/doc/man-pages/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ATTRIBUTES
CONFORMING TO
SEE ALSO
COLOPHON


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