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bin/45112: cgdconfig can return -1 from main

>Number:         45112
>Category:       bin
>Synopsis:       cgdconfig can return -1 from main
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Jul 03 19:10:00 +0000 2011
>Originator:     David A. Holland
>Release:        current of 20110703

   The end of main() directly returns the return value of various
   operation functions, some of which can return -1 on error. However,
   just as one should not call exit(-1), one should not return -1 from

   Some of these functions may return errnos as well, which doesn't
   seem like a good idea to mix with ordinary 0/1 exit codes.

   This issue was actually noted by jruoho in chat.


   code reading


   At the bottom of main, check for -1 and return 2 instead? Also, if
   there's some real reason to return errnos, perhaps offset them by
   16 or something... also, if so these exit codes should be
   documented, which they aren't.

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