Task_t considered harmful

Re:Task_t considered harmful by a-no-n on Wednesday October 26, 2016 @08:41AM (#12795950)

Thx. For an encore:

    /* must be run as root */
    #include <signal.h>
    main(){for(;;){kill(-1,SIGCONT);sleep(10);}}

and a .plist. Temporary hackaround.

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Re:Task_t considered harmful by garblegarble on Wednesday October 26, 2016 @08:46AM (#12795974)

What does -1 do, send that signal to all processes?

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Re:Task_t considered harmful by Sidnicious on Wednesday October 26, 2016 @09:02AM (#12796080)

I was going to say that it signals launchd's process group — every process spawned by launchd, which always runs with PID 1. However, the `kill` manpage confirms your hunch:

  -1      If superuser, broadcast the signal to all processes; otherwise
          broadcast to all processes belonging to the user.

(This is on macOS/iOS, Linux might have slightly different semantics.)

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Re:Task_t considered harmful by tokenizerrr on Wednesday October 26, 2016 @08:56AM (#12796033)

Yup. From man kill:

    -1

    All processes with pid larger than 1 will be signaled.

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Re:Task_t considered harmful by EdwinHoksberg on Wednesday October 26, 2016 @08:56AM (#12796038)

Yes, but not for the current process and init

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Re:Task_t considered harmful by merpnderp on Wednesday October 26, 2016 @08:54AM (#12796026)

To all with a PID > -1

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