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Home > Archive > Unix Programming > January 2008 > Is there an ANSI C compatible kill()?
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Is there an ANSI C compatible kill()?
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| David Mathog 2008-01-04, 7:21 pm |
| A program which uses fork(), select() etc. had been compiling cleanly with
gcc -Wall -pedantic -std=c99
but when I added a call to kill() the compiler emitted an:
implicit declaration of function 'kill'
which only went away when this was added:
-D_POSIX_SOURCE
Since ANSI C is apparently happy with fork() and fork returns the pid
of the child process, does ANSI C not also provide some other method
(ie, not kill()) to send a signal to the child? I'm aware of raise(),
but that only sends a signal from the process to itself.
Thanks,
David Mathog
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| Måns Rullgård 2008-01-04, 7:21 pm |
| David Mathog <mathog@caltech.edu> writes:
> A program which uses fork(), select() etc. had been compiling cleanly with
>
> gcc -Wall -pedantic -std=c99
>
> but when I added a call to kill() the compiler emitted an:
>
> implicit declaration of function 'kill'
>
> which only went away when this was added:
>
> -D_POSIX_SOURCE
>
> Since ANSI C is apparently happy with fork() and fork returns the pid
> of the child process, does ANSI C not also provide some other method
> (ie, not kill()) to send a signal to the child? I'm aware of raise(),
> but that only sends a signal from the process to itself.
ANSI (ISO) C includes neither fork() nor select(). That gcc doesn't
complain only means that your system headers include prototypes for
these functions regardless of compiler flags.
--
Måns Rullgård
mans@mansr.com
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