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V2556. MISRA. Use of a pointer to FILE …
Analyzer diagnostics
General Analysis (C++)
General Analysis (C#)
General Analysis (Java)
Diagnosis of micro-optimizations (C++)
Diagnosis of 64-bit errors (Viva64, C++)
MISRA errors
AUTOSAR errors
OWASP errors (C#)
Additional information
Contents

V2556. MISRA. Use of a pointer to FILE when the associated stream has already been closed.

Sep 02 2019

This diagnostic rule is based on the software development guidelines developed by MISRA (Motor Industry Software Reliability Association).

This rule applies only to C.

Using a pointer to the standard type 'FILE' after the associated stream has been already closed may lead to errors because that object will be having an undefined state.

Example of non-compliant code:

FILE* f = fopen("/path/to/file.log", "w");
if (f == NULL) { .... }
fprintf(f, "....");

if (....) // something went wrong
{
  fclose(f);
  fprintf(f, "...."); // Print log information
                      // after stream has been released.
}

This diagnostic is classified as:

  • MISRA-C-22.6
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