What events can cause ferror to return non-zero?

What events can cause ferror to return non-zero?

By : Gary Hau
Date : November 22 2020, 10:56 AM
around this issue It is primarily errors returned from the underlying system calls (e.g. read, write, lseek, close) that will cause the stream's error bit to be set.
Many f___() functions from stdio.h indicate that if the end-of-file is reached, or an error occurs, ferror() or feof() will indicate why. fscanf, for example:
code :

Share : facebook icon twitter icon
ferror(file) == 32

ferror(file) == 32

By : vynsane
Date : March 29 2020, 07:55 AM
wish help you to fix your issue You are using ferror() in a wrong way: it works only on a valid (non-null) file handle. Passing it NULL (in the case fopen() fails) causes UB, which manifests in your case by printing a random value (not trapping on NULL pointer access suggests that the underlying platform does not have memory protection).
Message text for ferror() return value

Message text for ferror() return value

By : Richard Audisio
Date : March 29 2020, 07:55 AM
wish helps you From this reference page:
How to set the `-ferror-limit` when using Fastlane

How to set the `-ferror-limit` when using Fastlane

By : user4019701
Date : March 29 2020, 07:55 AM
I wish did fix the issue. Since fastlane changed from shenzhen to gym this parameter doesn't seem necessary anymore.
fread and ferror don't set errno

fread and ferror don't set errno

By : immortal
Date : November 25 2020, 11:01 PM
Hope this helps You can't get there from here.
fread does not set errno (as you have discovered), and as such you cannot really determine much about a specific error state; only that there is one. The exact nature of the error is generally implementation-dependent. There is no C standard-library-based portable way to gather it .
What is the behaviour of `ferror(FILE *)` and `std::ferror(FILE *)` when passed invalid pointers?

What is the behaviour of `ferror(FILE *)` and `std::ferror(FILE *)` when passed invalid pointers?

By : Ivan Wong
Date : October 04 2020, 10:00 AM
Hope this helps According to C draft N1570 §4.2 omissions are considered undefined behavior (emphasis added):
Related Posts Related Posts :
  • Program works but outputs trailing garbage values
  • Letting 2 pointer pointing to same address
  • Different ways to print the two-dimensional array's contents
  • C Programming : Confusion between operator precedence
  • C code inside a loop not being executed
  • C - Weird symbols
  • C - Get pointer adress to string
  • how to start a function using a Struct?
  • Trying to tweak sscanf() to ignore \n and \t
  • How to find the inverse of a Rectangular Matrix in C using GSL
  • sizeof() showing different output
  • How to select/read/copy values after specific character in a string
  • Jump from bootloader generates exception
  • Array dropping values, picks up garbage
  • Swig: Syntax error in input(3)
  • multiple definition and making sure function is correctly written
  • MD4 openssl core dumped
  • Undefined-Behavior at its best, is it -boundary break? -bad pointer arithmetic? Or just -ignore of aliasing?
  • Why am i getting problem3.c:20:23: error: expected expression before ‘int’?
  • Right Justified Zero filled String in C
  • C Function with parameter without type indicator still works?
  • How to transmit data from an interrupt handler to an user application?
  • Why do I get the error "bash: ./a.out: Permission denied" when I execute a C program in Linux mint 15
  • syntax of sigchld and its declaration
  • error using g_idle_add() in C++, same thing works in C
  • why if else or nested if else are called single statement in C
  • How do I interpret this printf in C
  • load the functions of a shell script without executing it
  • Is FilterSendNetBufferLists handler a must for an NDIS filter to use NdisFSendNetBufferLists?
  • How to write to flash memory using inline assembly?
  • More Return Statements vs. More Indentation
  • How to show an image on a PictureBox from resource?
  • Having malloced some memory,I could't calculator the proper size of the memories I malloced.I don't know why
  • What is the main difference between integer pointer and character pointer?
  • Why are some functions declared extern and header file not included in source in Git source code?
  • what is the use of fflush(stdin) in c programming
  • Is it safe to return file File descriptor locally allocated from another function In C
  • Changing undefined values of an array
  • What does an empty parameter list mean?
  • using strtol on a string literal causing segmentation fault
  • Same structure objects memory overlap?
  • C-Linux-Any way to pass command "history" to Linux shell?
  • Using #define in defining string size C
  • How to use thread pool and message queues in Multithreaded Matrix Multiplication?
  • Can't find how to select path to run a C program
  • Automatic variable in C not initialized but given fixed value within loop
  • main() function defined without return type gives warning
  • Output of following code with integer, float, char variable
  • why buffer memory allocation error in opencl
  • Why am I getting this error during run-time?
  • Strange behaviour of the pow function
  • task in increment , decrement , printf() , why these are evaluated in this manner in C
  • 28 extra bytes in bss
  • Waiting for multiple events without polling
  • Why are my variables reporting as "undeclared identifier" when compiling?
  • Correct AddNode function but somehing happens when I printf
  • When I traverse in the splay tree, then now which one is root?
  • Data type conversion in Postfix evaluation
  • No output in terminal (Head First C)
  • Data writes over after realloc
  • shadow
    Privacy Policy - Terms - Contact Us © ourworld-yourmove.org