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strcpy, strncpy — ʸ?????Υ??ԡ?

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Standard C Library (libc, -lc)

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<string.h> char * strcpy(char *dst, const char *src) char * strncpy(char *dst, const char *src, size_t len)

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strcpy() ?ؿ??ϡ?ʸ???? src ?? dst ?˥??ԡ????ޤ? (??ü?? ‘\0’ ʸ?????ޤ???)??

strncpy() ?ؿ??ϡ? len ?İʾ???ʸ???? dst ?˥??ԡ??????? src ??Ĺ???? len ʸ???ʲ??ξ????ˤ? ‘\0’ ʸ?????ɲä??ޤ????ޤ??? src ??Ĺ???? len ʸ???ʾ??Ǥ????????ϡ? dst ????λ?????ޤ?????

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strcpy() ?????? strncpy() ?ؿ??ϡ? dst ???֤??ޤ???

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???ιԤϡ? chararray ?? “abc\0\0\0” ?????ꤷ?ޤ? :

char chararray[6];

(void)strncpy(chararray, "abc", sizeof(chararray));

???ιԤϡ? chararray ?? “abcdef” ?????ꤷ?ޤ? :

char chararray[6];

(void)strncpy(chararray, "abcdefgh", sizeof(chararray));

?ѥ??᡼????Ĺ??????????????Ĺ????Ʊ???? ?????ʾ??Ǥ??뤿?? chararray ?? NUL ?ǽ?λ???ʤ? ???Ȥ????դ??Ƥ?????????

???ιԤϡ? input ???? buf ??ʸ????Ŭ?ڤ˥??ԡ????? ???η??̤? NUL ?ǽ?λ?????ޤ??? strncpy() ??ʸ???????Τ? NUL ?ǽ?λ???뤳?Ȥ? ?ݾڤ??ʤ??????ǡ? ?????????Τˤ??ʤ????Фʤ??ޤ?????

char buf[1024];

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

???????Τ褦?? strlcpy(3) ?????Ѥ????ȡ??????ɤ??¹ԤǤ??뤫?⤷???ޤ?????

strlcpy(3) ??ɸ??Ū?ˤ??????????Ƥ??ʤ??Τǡ? ?ܿ???̵?ط??ʤȤ????? ???Ѥ????褦?????դ??Ƥ?????????

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bcopy(3), memccpy(3), memcpy(3), memmove(3), strlcpy(3)

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strcpy() ?????? strncpy() ?ؿ??ϡ? ISO/IEC 9899:1990 (“ISO C90”) ??Ŭ?礷?Ƥ??ޤ???