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by ruslan
1419 days ago
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Just wonder if author is aware of SIGSTOP/SIGCONT that allows to pause/resume any process gracefully ? Both signals can be caught and handled. Crtl-C (SIGINT), as far as I know, was used to "gracefully terminate" interactive process from day zero of Unix. I cannot find any use in that of what author proposes: suspend execution by sending SIGINT, but then what ? Get to some process built-in debugging shell ? Isn't that what GDB was made for ? |
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Non-interactive programs do not need any special handling for SIGINT, and that seems to be what you're talking about. The author was talking about interactive programs like irb, bc, bash, gdb, and python, all of which behave as they desire, returning you to their REPL prompt upon receipt of SIGINT. One example of an interactive program that does not have the desired behavior is GNU Units.