write return
data_size: The original data_size, exactly as passed to the write(2) system call. Returns: The message explaining the error. This message buffer is shared by all libexplain functions which do not supply a buffer in their argument list. This will be overwr,On some systems, certain legacy non-blocking modes (e.g. O_NDELAY ) cause write() to return 0 (without setting errno ) if no data can be written without blocking, at least for certain types of file descriptors. (The POSIX standard O_NONBLOCK uses an error
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 write return 相關參考資料
c - What should I do when write(fd, buf, count) returns 0? - Stack ...
Unless you explicitly passed a length of zero to write , this will never happen on a correct, POSIX conformant system. If you want to support all kinds of obscure broken legacy proprietary unices, you... https://stackoverflow.com explain_write(3): explain write errors - Linux man page
data_size: The original data_size, exactly as passed to the write(2) system call. Returns: The message explaining the error. This message buffer is shared by all libexplain functions which do not supp... https://linux.die.net linux - Is a return value of 0 from write(2) in C an error? - Stack Overflow
On some systems, certain legacy non-blocking modes (e.g. O_NDELAY ) cause write() to return 0 (without setting errno ) if no data can be written without blocking, at least for certain types of file de... https://stackoverflow.com linux - write return value c - Stack Overflow
If a write() requests that more bytes be written than there is room for (for example, the process' file size limit or the physical end of a medium), only as many bytes as there is room for shall ... https://stackoverflow.com write (C System Call) - Code Wiki
const void *buf, A pointer to a buffer of at least nbytes bytes, which will be written to the file. size_t nbytes, The number of bytes to write. If smaller than the provided buffer, the output is tru... http://codewiki.wikidot.com write (system call) - Wikipedia
Note that write() does not return an unsigned value; it returns -1 if an error occurs so it must return a signed value. The write function returns the number of bytes successfully written into the arr... https://en.wikipedia.org write - The Open Group Library
On a regular file or other file capable of seeking, the actual writing of data shall proceed from the position in the file indicated by the file offset associated with fildes. Before successful return... http://pubs.opengroup.org write(2) - Linux manual page - man7.org
If the file was open(2)ed with O_APPEND, the file offset is first set to the end of the file before writing. The adjustment of the file offset and the write operation are performed as an atomic step. ... http://man7.org write(2): to file descriptor - Linux man page
On success, the number of bytes written is returned (zero indicates nothing was written). On error, -1 is returned, and errno is set appropriately. If count is zero and fd refers to a regular file, th... https://linux.die.net write(3): on file - Linux man page
The write() function shall attempt to write nbyte bytes from the buffer pointed to by buf to the file associated with the open file descriptor, fildes. Before any action described below is taken, and ... https://linux.die.net |