ref: 994751d39485e086ef623f202fb1b84729fd5d19
dir: /doc/man3/strncat.3/
.TH strncat 3 .SH NAME strncat - concatenate a string with a part of another .SH SYNOPSIS #include <string.h> char *strncat(char *restrict s1, const char *restrict s2, size_t n) .SH DESCRIPTION The .BR strncat () function appends not more than n characters (a null character and characters that follow are not appended) from the array pointed to by .I s2 to the end of the string pointed to by .IR s1 . .PP The initial character of .I s2 overwrites the null character at the end of .IR s1 . .PP A terminating null character is always appended to the result. The function shall not append anything to .I s1 if .I n is equal to 0. If copying takes place between objects that overlap, the behaviour is undefined. .SH RETURN VALUE The .BR strncat () function shall return the pointer .IR s1 . .SH STANDARDS ISO/IEC 9899:1999 Section 7.21.3.2