[Bug testsuite/16636] New: pwritev/preadv syscall testsuite bug on RHEL5

[dsmith at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=16636

            Bug ID: 16636
           Summary: pwritev/preadv syscall testsuite bug on RHEL5
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: testsuite
          Assignee: systemtap at sourceware dot org
          Reporter: dsmith at redhat dot com

On RHEL5 (2.6.18-371.4.1.el5 x86_64), the readwrite subtest of the syscall
testsuite is coming up as 'UNTESTED'. This is because the readwrite.c subtest
can't be compiled. The pwritev/preadv functions are coming up undefined.

The test tries to check for pwritev()/preadv() support by seeing if SYS_preadv
and SYS_pwritev are defined. For some odd reason, on this kernel those defines
are available, even though the pwritev()/preadv() syscalls don't exist on this
kernel.

To fix this, the pwritev()/preadv() syscall tests should be put in their own
test files. The tests could be improved also.

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