30 lines
1.6 KiB
Plaintext
30 lines
1.6 KiB
Plaintext
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15 January 1990
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Paul Vixie
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Many people have contributed to cron. Many more than I can remember, in fact.
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Rich Salz and Carl Gutekunst were each of enormous help to me in V1; Carl for
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helping me understand UNIX well enough to write it, and Rich for helping me
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get the features right.
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John Gilmore wrote me a wonderful review of V2, which took me a whole year to
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answer even though it made me clean up some really awful things in the code.
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(According to John the most awful things are still in here, of course.)
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Paul Close made a suggestion which led to /etc/crond.pid and the mutex locking
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on it. Kevin Braunsdorf of Purdue made a suggestion that led to @reboot and
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its brothers and sisters; he also sent some diffs that lead cron toward compil-
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ability with System V, though without at(1) capabilities, this cron isn't going
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to be that useful on System V. Bob Alverson fixed a silly bug in the line
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number counting. Brian Reid made suggestions which led to the run queue and
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the source-file labelling in installed crontabs.
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Scott Narveson ported V2 to a Sequent, and sent in the most useful single batch
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of diffs I got from anybody. Changes attributable to Scott are:
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-> sendmail won't time out if the command is slow to generate output
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-> day-of-week names aren't off by one anymore
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-> crontab says the right thing if you do something you shouldn't do
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-> crontab(5) man page is longer and more informative
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-> misc changes related to the side effects of fclose()
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-> Sequent "universe" support added (may also help on Pyramids)
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-> null pw_shell is dealt with now; default is /bin/sh
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