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Checking errno after multiple calls to library functions can lead to spurious error reporting, possibly resulting in incorrect program operation.
Recommendation | Severity | Likelihood | Remediation Cost | Priority | Level |
|---|---|---|---|---|---|
ERR01-C |
Low |
Probable |
Low | P6 | L2 |
Automated Detection
Tool | Version | Checker | Description | ||||
|---|---|---|---|---|---|---|---|
|
CC2.ERR01 | Fully implemented | ||||||||
| LDRA tool suite |
| 44 S | Enhanced Enforcement | ||||||
| Parasoft C/C++test |
| CERT_C-ERR01-a | The error indicator 'errno' shall not be used |
Related Vulnerabilities
Search for vulnerabilities resulting from the violation of this rule on the CERT website.
Related Guidelines
| SEI CERT C++ |
| Coding Standard | VOID ERR01-CPP. Use ferror() rather than errno to check for FILE stream errors |
Bibliography
| [Horton 1990] | Section 14, p. 254 |
| [Koenig 1989] | Section 5.4, p. 73 |
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