Library Initialization and Termination Exits

Exit Linkage Conventions

The SAS/C initialization exit, L$XSTRT, is called by library initialization shortly before control is passed to main . If the indep compiler option is specified, the library calls this exit before control is passed to the first user function.

void L$XSTRT(void *user_words [4] );

The SAS/C termination exit, L$XFINI, is called by library termination after all atexit routines have been called but before files are closed or signal handling is terminated. L$XFINI receives the program's exit code as a parameter and can change it.

int L$XFINI(void *user_words [4] , int rc);

user_words is a pointer to four words that contain the current contents of the CRAB user area. These values are the same as those stored by L$XSTRT, unless the CRAB user words were modified during program execution. The rc parameter contains the program's exit code. The library takes the return value from L$XFINI library as an overriding exit code, replacing the exit code specified by the program. If you do not want the program's exit code to be changed, specify return (rc); within the program so that L$XFINI will return the value of rc . The library calls L$XFINI only once during program termination regardless of the number of times that exit is called from the program.