If a global core file directory is enabled, core files can be distinguished from one another by using the variables described in the following table.
| 
 Variable Name  | 
 Variable Definition  | 
|---|---|
| 
 %p  | 
 Process ID  | 
| 
 %u  | 
 Effective user ID  | 
| 
 %g  | 
 Effective group ID  | 
| 
 %f  | 
 Executable file name  | 
| 
 %n  | 
 System node name, equivalent to the uname -n output  | 
| 
 %m  | 
 Machine name, equivalent to the uname -m output  | 
| 
 %t  | 
 Decimal value of time(2) system call  | 
| 
 %%  | 
 Literal %  | 
For example, if the global core file path is set to:
/var/core/core.%f.%p
and a sendmail process with PID 12345 terminates abnormally, it produces the following core file:
/var/core/core.sendmail.12345