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NetBSD 6.1.5 - man page for strncat (netbsd section 3)

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STRCAT(3)			   BSD Library Functions Manual 			STRCAT(3)

NAME
     strcat, strncat -- concatenate strings

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <string.h>

     char *
     strcat(char * restrict s, const char * restrict append);

     char *
     strncat(char * restrict s, const char * restrict append, size_t count);

DESCRIPTION
     The strcat() and strncat() functions append a copy of the nul-terminated string append to
     the end of the nul-terminated string s, then add a terminating '\0'.  The string s must have
     sufficient space to hold the result.

     The strncat() function appends not more than count characters where space for the terminat-
     ing '\0' should not be included in count.

RETURN VALUES
     The strcat() and strncat() functions return the pointer s.

EXAMPLES
     The following appends ``abc'' to ``chararray'':

	   char *letters = "abcdefghi";

	   (void)strncat(chararray, letters, 3);

     The following example shows how to use strncat() safely in conjunction with strncpy(3).

	   char buf[BUFSIZ];
	   char *input, *suffix;

	   (void)strncpy(buf, input, sizeof(buf) - 1);
	   buf[sizeof(buf) - 1] = '\0';
	   (void)strncat(buf, suffix, sizeof(buf) - 1 - strlen(buf));

     The above will copy as many characters from ``input'' to ``buf'' as will fit.  It then
     appends as many characters from suffix as will fit (or none if there is no space).  For
     operations like this, the strlcpy(3) and strlcat(3) functions are a better choice, as shown
     below.

	   (void)strlcpy(buf, input, sizeof(buf));
	   (void)strlcat(buf, suffix, sizeof(buf));

SEE ALSO
     bcopy(3), memccpy(3), memcpy(3), memmove(3), strcpy(3), strlcat(3), strlcpy(3)

STANDARDS
     The strcat() and strncat() functions conform to ISO/IEC 9899:1999 (``ISO C99'').

BSD					 August 11, 2002				      BSD
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