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fread returns error Roy, Washington

RETURN VALUE top On success, fread() and fwrite() return the number of items read or written. Not the answer you're looking for? It is easier to write an incorrect program than understand a correct one. 40. Forum Today's Posts C and C++ FAQ Forum Actions Mark Forums Read Quick Links View Forum Leaders What's New?

Logical fallacy: X is bad, Y is worse, thus X is not bad Are RingCT signatures malleable? Returns: The message explaining the error. ERRORS Refer to fgetc(). Are independent variables really independent?

How to reliably reload package after change? Anyhow the question stems from the following lines of code: Code: #include #include #include #include #include #include #define LOG "/var/run/utmp" static int process_type(struct utmp *user) fread Visual Studio 2015 Other Versions Visual Studio 2013 Visual Studio 2012 Visual Studio 2010 Visual Studio 2008 Visual Studio 2005 Visual Studio .NET 2003  Reads data from a stream.Syntax Copy If execution is allowed to continue, this function sets errno to EINVAL and returns 0.See _doserrno, errno, _sys_errlist, and _sys_nerr for more information on these, and other, error codes.RemarksThe fread function

Not the answer you're looking for? Join them; it only takes a minute: Sign up do fread and fwrite have failure? see where placed in the function below:

function readfile_chunked( $filename, $retbytes = true ) {

Derived from Issue 1 of the SVID. How to handle a senior developer diva who seems unaware that his skills are obsolete? Because of possible differences in element length and byte ordering, files written using fwrite() are application-dependent, and possibly cannot be read using fread() by a different application or by the same i.e., 5.

What does a well diversified self-managed investment portfolio look like? Don't I also need ferror() to account for errors? 03-12-2006 #4 Dave_Sinkula View Profile View Forum Posts Just Lurking Join Date Oct 2002 Posts 5,005 Why not just check whether fread If Dumbledore is the most powerful wizard (allegedly), why would he work at a glorified boarding school? Issue 6 Extensions beyond the ISOC standard are marked.

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Browse other questions tagged c or ask your own question. If an error or end-of-file condition occurs, then less than K elements may be read, in which case a number smaller than K will be returned. –The Paramagnetic Croissant Feb 8 A bullet shot into a door vs.

nmemb The original nmemb, exactly as passed to the fread(3) system call. For example if you have a file that contains 4 32bit ints, you can read it with elements_read=fread(buf,sizeof(int),4,fp); bytes_read then should be 4 if no errors occured share|improve this answer edited However, there hasn't been much traffic. It then tries to open // FREAD.OUT and read in 25 characters.

The errno global variable will be used to obtain the error value to be decoded. How do I explain that this is a terrible idea? fp The original fp, exactly as passed to the fread(3) system call. Could someone please explain to me what is meant by number of items read or written in this context.

The Open Group Base Specifications Issue 6 IEEE Std 1003.1, 2004 Edition Copyright © 2001-2004 The IEEE and The Open Group, All Rights reserved.A newer edition of this document exists here If you have a focus for your spell casting do you need to pay materials? Otherwise, if a read error occurs, the error indicator for the stream shall be set, [CX] and errno shall be set to indicate the error. Returns: The message explaining the error.

Creating a game, from start to finish Recent additions How to create a shared library on Linux with GCC - December 30, 2011 Enum classes and nullptr in C++11 - The function fread() does not distinguish between end-of-file and error, and callers must use feof(3) and ferror(3) to determine which occurred. This answer to above linked question (and the comment to it) I find especially insightful in this matter: share|improve this answer edited Feb 8 '15 at 20:34 answered Feb 8 They return the number of objects read or written.

When there are less bytes in the stream than consitute an item, the number of bytes consumed from the stream might however be greater than the number of bytes read as Why is it a bad idea for management to have constant access to every employee's inbox? If an error occurs, the resulting value of the file position indicator for the stream is unspecified. Did Sputnik 1 have attitude control?

Everything works correctly, and the files get extracted just fine, yet fread() is returning 1 instead of filesize. Are RingCT signatures malleable? Bytes read: 1 bytes. The number of items as requested will be returned.

Always calculate a $seek_end even though the range specification says it could be empty... bytes delivered like readfile() does.
?> up down 3 webmaster at wildpeaks dot com how to handle this?2check return value fread and fwrite2Right arrow symbol causing abrupt end of fread?6Unexpected return value from fread()0fseek, fread and return the pointer (C) in binary file function not length Up to length number of bytes read.

message_size The size in bytes of the location in which to store the returned message.