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truncate, ftruncate — ???ꤷ??Ĺ???˥ե????????ڤ??ΤƤ?????ĥ?????ꤹ??

?饤?֥???

Standard C Library (libc, -lc)

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<unistd.h> int truncate(const char *path, off_t length) int ftruncate(int fd, off_t length)

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truncate() ?????ƥॳ?????ϡ? path ?ǻ??ꤵ?????ե????뤫 fd ?ǻ??Ȥ??????ե??????Υ????????? length ?Х??Ȥˤʤ??褦???ڤ??ΤƤ?????ĥ???ޤ??? ?ե????뤬???Υ??????????礭???????ϡ?;ʬ?ʥǡ????????????ޤ??? ?ե????뤬???Υ????????꾮?????????ϡ?0 ???񤭹??ޤ줿?褦?˳?ĥ?????ޤ??? ftruncate() ?Ǥϡ??ե????뤬???????Ѥ˳????Ƥ???ɬ?פ??????ޤ???

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Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error.

???顼

truncate() ?????ƥॳ?????ϡ??ʲ??Τ褦?ʾ????˽????????Ԥ??ޤ?:

[ENOTDIR]

?ѥ??ι??????????˥ǥ??쥯?ȥ??ʳ??Τ??Τ??ޤޤ??Ƥ??ޤ???

[ENAMETOOLONG]

?ѥ?̾?ι??????Ǥ? 255 ʸ?????ۤ??Ƥ??뤫?? ?ޤ??ϥѥ?̾???Τ? 1023 ʸ?????ۤ??Ƥ??ޤ???

[ENOENT]

???ꤵ?줿?ե????뤬¸?ߤ??ޤ?????

[EACCES]

???֥ѥ?̾?ι??????ǤˤĤ??Ƹ??????Ĥ????ݤ????Ƥ??ޤ???

[EACCES]

???ꤵ?줿?ե??????˥桼?????񤭹????ޤ?????

[ELOOP]

?ѥ?̾???Ѵ??????Ȥ??˸??Ф??줿?????ܥ??å????󥯤?¿?????ޤ???

[EISDIR]

???ꤵ?줿?ե????뤬?ǥ??쥯?ȥ??ˤʤäƤ??ޤ???

[EROFS]

???ꤵ?줿?ե????????ɼ??????ѥե????륷???ƥ????ˤ????ޤ???

[ETXTBSY]

?ե????뤬???¹????Υԥ奢?ץ????????? (??ͭ?ƥ?????) ?ե??????Ǥ???

[EIO]

inode ?ι????򤷤Ƥ????֤??????ϥ??顼??ȯ?????ޤ?????

[EFAULT]

path ?????????ץ??????˳??????Ƥ??줿???ɥ쥹???֤??ϰϳ????ؤ??Ƥ??ޤ???

ftruncate() ?????ƥॳ?????ϡ??ʲ??Τ褦?ʾ????˽????????Ԥ??ޤ?:

[EBADF]

fd ??????ͭ???ʵ??һҤǤϤ????ޤ?????

[EINVAL]

fd ?????ϥե??????ǤϤʤ??????åȤ򻲾Ȥ??Ƥ??ޤ???

[EINVAL]

fd ?????????????Ѥ˳????Ƥ??ޤ?????

??Ϣ????

open(2)

?Х?

???θƽФ??ϡ??ե??????Τ????ϰϤ??????Ǥ????褦?˰??̲????? ɬ?פ??????ޤ???

truncate() ?????Ѥ??ƥե?????????ĥ?????ȡ??ܿ????????????ޤ???

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truncate() ?????ƥॳ?????ϡ? 4.2BSD ???о줷?ޤ?????