strncat(3) - NetBSD Manual Pages

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STRCAT(3)               NetBSD Library Functions Manual              STRCAT(3)

strcat, strncat -- concatenate strings
Standard C Library (libc, -lc)
#include <string.h> char * strcat(char * restrict s, const char * restrict append); char * strncat(char * restrict s, const char * restrict append, size_t count);
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 ter- minating `\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.
The strcat() and strncat() functions return the pointer s.
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));
bcopy(3), memccpy(3), memcpy(3), memmove(3), strcpy(3), strlcat(3), strlcpy(3)
The strcat() and strncat() functions conform to ISO/IEC 9899:1999 (``ISO C99''). NetBSD 9.1 August 11, 2002 NetBSD 9.1
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