1*0061c6a5Schristos15 January 1990 2*0061c6a5SchristosPaul Vixie 3*0061c6a5Schristos 4*0061c6a5SchristosMany people have contributed to cron. Many more than I can remember, in fact. 5*0061c6a5SchristosRich Salz and Carl Gutekunst were each of enormous help to me in V1; Carl for 6*0061c6a5Schristoshelping me understand UNIX well enough to write it, and Rich for helping me 7*0061c6a5Schristosget the features right. 8*0061c6a5Schristos 9*0061c6a5SchristosJohn Gilmore wrote me a wonderful review of V2, which took me a whole year to 10*0061c6a5Schristosanswer even though it made me clean up some really awful things in the code. 11*0061c6a5Schristos(According to John the most awful things are still in here, of course.) 12*0061c6a5Schristos 13*0061c6a5SchristosPaul Close made a suggestion which led to /etc/crond.pid and the mutex locking 14*0061c6a5Schristoson it. Kevin Braunsdorf of Purdue made a suggestion that led to @reboot and 15*0061c6a5Schristosits brothers and sisters; he also sent some diffs that lead cron toward compil- 16*0061c6a5Schristosability with System V, though without at(1) capabilities, this cron isn't going 17*0061c6a5Schristosto be that useful on System V. Bob Alverson fixed a silly bug in the line 18*0061c6a5Schristosnumber counting. Brian Reid made suggestions which led to the run queue and 19*0061c6a5Schristosthe source-file labelling in installed crontabs. 20*0061c6a5Schristos 21*0061c6a5SchristosScott Narveson ported V2 to a Sequent, and sent in the most useful single batch 22*0061c6a5Schristosof diffs I got from anybody. Changes attributable to Scott are: 23*0061c6a5Schristos -> sendmail won't time out if the command is slow to generate output 24*0061c6a5Schristos -> day-of-week names aren't off by one anymore 25*0061c6a5Schristos -> crontab says the right thing if you do something you shouldn't do 26*0061c6a5Schristos -> crontab(5) man page is longer and more informative 27*0061c6a5Schristos -> misc changes related to the side effects of fclose() 28*0061c6a5Schristos -> Sequent "universe" support added (may also help on Pyramids) 29*0061c6a5Schristos -> null pw_shell is dealt with now; default is /bin/sh 30