 
                            These are rules and recommendations for functions that are defined as part of the POSIX family of standards but are not included in ISO/IEC 9899-1999.
Recommendations
POS00-A. Avoid race conditions with multiple threads
POS01-A. Check for the existence of links
Rules
POS30-C. Use the readlink() function properly
POS31-C. Do not unlock or destroy another thread's mutex
POS32-C. Include a mutex when using bit-fields in a multi-threaded environment
POS34-C. Do not call putenv() with an automatic variable as the argument
Risk Assessment
| Recommendation | Severity | Likelihood | Remediation Cost | Priority | Level | 
|---|---|---|---|---|---|
| POS00-A | 2 (medium) | 2 (probable) | 1 (high) | P4 | L3 | 
| POS01-A | 2 (medium) | 3 (likely) | 1 (high) | P6 | L2 | 
| Rule | Severity | Likelihood | Remediation Cost | Priority | Level | 
|---|---|---|---|---|---|
| POS30-C | 1 (low) | 2 (probable) | 2 (medium) | P4 | L3 | 
| POS31-C | 2 (medium) | 2 (probable) | 1 (high) | P4 | L3 | 
| POS32-C | 2 (medium) | 2 (probable) | 2 (medium) | P8 | L2 | 
| POS33-C. | 1 (low) | 2 (probable) | 3 (low) | P6 | L2 | 
| POS34-C | 3 (high) | 1 (unlikely) | 2 (medium) | P6 | L2 | 
| POS35-C | 3 (high) | 3 (likely) | 2 (medium) | P18 | L1 |