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Subjectsetitimer, sleep and SIGALRM
    Hi Thomas :))

AFAIK, 'sleep()' is a libc function, and if you use GNU libc, it
doesn't make use of SIGALRM, so it is safe to use 'setitimer()' and
'sleep()' at the same time on a program.

Moreover, 'setitimer()' is too a libc function to my knowledge (I
may be wrong here, so please don't hit me XDD).

Raúl
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