One issue with that is that using 1 for success conflicts with the nearly universal Unix convention of using 0 for success. C requires exit(0) to indicate a su

One issue with that is that using 1 for success conflicts with the nearly universal Unix convention of using 0 for success. C requires exit(0) to indicate a successful status. The OpenVMS C library translates that to a status of 1. A lot of C code uses exit(1) to indicate failure, but it indicates success in OpenVMS. (Use EXIT_FAILURE, a macro defined in <stdlib.h>, instead.)