This appendix contains guidelines for functions that are defined as part of the POSIX family of standards but are not included in ISO/IEC 9899-1999the C Standard. These rules and recommendations are not part of the core standard because they do not apply in all C language applications and because they represent an incomplete set. The intent of providing these guidelines is to demonstrate how rules and recommendations for other standards or specific implementations may be integrated with the core C99 C recommendations.
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Rules
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Risk Assessment Summary
Recommendation Rule | Severity | Likelihood | Detectable | Repairable Remediation Cost | Priority | Level |
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| POS01POS30-C | High | medium Probable | likely Yes | high Yes | P6 P18 | L2 L1 POS02 |
| POS34-C | High | high Unlikely | likely Yes | high No | P9 P6 | L2 POS03 |
| POS35-C | High | Medium Likely | Probable No | Medium No | P8 P9 | L2 POS04 |
| POS36-C | low High | unlikely Probable | medium Yes | P2 Yes | L3 P18 | |
Rule | Severity | Likelihood | Remediation Cost | Priority | Level | |
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| POS37 POS30-C | High | Probable high | probable Yes | medium Yes | P12 P18 | L1 POS33 |
| POS38-C | Medium | low Unlikely | probable No | low No | P6 P2 | L2 L3 POS34 |
| POS39-C | Medium | high Likely | unlikely Yes | medium No | P6 P12 | L2 L1 POS35 |
| POS44-C | Low | Probable high | likely No | medium No | P18 P2 | L1 L3 POS36 |
| POS47-C | Medium | high Probable | probable No | medium No | P12 P4 | L1 L3 POS37 |
| POS48-C | Medium | Probable high | probable No | low No | P18 P4 | L1 L3 POS38 |
| POS49-C | Medium | medium Probable | unlikely No | medium No | P4 | L3 POS39 |
| POS50-C | Medium | Probable medium | likely No | low No | P18 P4 | L1 L3 POS41 |
| POS51-C | Low | low Probable | unlikely No | high No | P1 P2 | L3 POS44 |
| POS52-C | Low | Probable low | probable No | low No | P6 P2 | L2 L3 POS45 |
| POS53-C | Medium | Probable medium | unlikely Yes | medium No | P4 P8 | L3 L2 POS47 |
| POS54-C | High | medium Likely | probable Yes | low Yes | P12 P27 | L1 |
Related Rules and Recommendations
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MSC39-C. Do not call va_arg() on a va_list that has indeterminate value CERT C Secure Coding Standard