d...

This section describes the following functions, macros and external variables:

• __DATE__ - macro for compilation date
• daylight - daylight savings time variable
• dbm_clearerr, dbm_close, dbm_delete, dbm_error, dbm_fetch, dbm_firstkey, dbm_nextkey, dbm_open, dbm_store - functions for managing dbm databases
• difftime, difftime64 - compute difference between two calendar time values
• dirfd - extract file descriptor
• dirname - parent directory of pathname
• div - divide with integers
• double2ieee - Convert floating-point number from /390 format to IEEE format (BS2000)
• drand48, erand48, jrand48, lcong48, lrand48, mrand48, nrand48, seed48, srand48 - generate pseudo-random numbers
• dup, dup2 - duplicate file descriptor