strcat man page on OpenBSD

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STRCAT(3)		  OpenBSD Programmer's Manual		     STRCAT(3)

NAME
     strcat, strncat - concatenate strings

SYNOPSIS
     #include <string.h>

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

     char *
     strncat(char *s, const char *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 terminating `\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 ANSI X3.159-1989 (``ANSI
     C'').

OpenBSD 4.9			 May 31, 2007			   OpenBSD 4.9
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