open, creat

2018年12月30日 — ... return open(name, O_WRONLY | O_CREAT | O_TRUNC, mode) }. close() 系統呼叫. 應用程式使用完fd 後，可以用close() 系統呼叫將fd 從檔案表中移出 ...

Return Value. Upon successful completion, the function shall open the file and return a non-negative integer representing the lowest numbered unused file ...

The return value of open() is a file descriptor, a small, nonnegative ... This nonstandard access mode is used by some Linux drivers to return a file ...

2002年1月10日 — RETURN VALUE 返回值. open 和creat 都返回一個新的文件描述符(若是有錯誤 ... On NFS file systems with UID mapping enabled, open may return a file ...

2002年1月10日 — RETURN VALUE 返回值. open 和creat 都返回一個新的檔案描述符(若是有錯誤 ... On NFS file systems with UID mapping enabled, open may return a file ...

2023年8月8日 — On success the open function returns a non-negative integer, which is the file descriptor. On failure, it returns -1 , and you can use the errno ...

The open() function shall return a file descriptor for the named file that is ... RETURN VALUE. Upon successful completion, the function shall open the file ...

2013年4月7日 — When open returns 0, it's telling you that you should use fd 0 if you want to use the file you just opened. Did you perchance close stdin?

The normal return value from open is a non-negative integer file descriptor. In the case of an error, a value of -1 is returned instead. In addition to the ...