Thanks for spotting this, fixed in R-devel (including the Windows version).
Tomas
On 03/18/2018 09:53 PM, Henrik Bengtsson wrote:
For the record, I've just filed the following bug report with a patch
to https://bugs.r-project.org/bugzilla3/show_bug.cgi?id=17395:
tools::pskill() returns either random garbage or incorrect values,
because the internal ps_kill() (a) it does not initiate the returned
logical, and (b) it assigns the logical returned the 0/-1 value of C's
kill().
# Example 1: returns garbage due to non-initiated allocation
as.integer(tools::pskill(0))
[1] 44764824
as.integer(tools::pskill(0))
[1] 41609736
as.integer(tools::pskill(0))
[1] 45003984
# Example 2: returns 0 in success and -1 on failure
p <- parallel::mcparallel({ Sys.sleep(3600); 42L })
res <- tools::pskill(pid = p$pid, signal = tools::SIGKILL)
as.integer(res)
[1] 0
p <- parallel::mcparallel({ Sys.sleep(3600); 42L })
res <- tools::pskill(pid = p$pid, signal = -1) ## invalid signal
as.integer(res)
[1] -1
/Henrik
______________________________________________
R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel
______________________________________________
R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel
