errnum 42 include/portability.h char *strerror(int errnum); errnum 25 replace/strerror.c strerror(int errnum) errnum 29 replace/strerror.c if (errnum < 0) { errnum 32 replace/strerror.c if (errnum >= sys_nerr) { errnum 33 replace/strerror.c snprintf(whaterr, sizeof(whaterr), "error %d", errnum);