tests: change text marker in fork-f and vfork-f tests

Use chdir syscalls instead of pwrite64 syscalls as a method of inserting
text markers into strace output because the former are more portable.

* tests/fork-f.c (logit): Rename to logit_. Use chdir instead of pwrite.
(logit): New macro wrapper around logit_.
(main): Update expected output.
* tests/vfork-f.c: Likewise.
* tests/fork-f.test: Update.

Fix printing of 32-bit times syscall return value on 64-bit architectures

This change complements commit v4.9-359-gd93d9f8 by fixing
RVAL_UDECIMAL case.
The only syscall that appears to be affected is the times syscall.

* syscall.c (trace_syscall_exiting): In case of RVAL_UDECIMAL,
when current personality is 32-bit, print 32-bit return code.
* NEWS: Mention this fix.

Reported-by: Steve McIntyre <steve@einval.com>

tests/vfork-f.c: support platforms without vfork

On some platforms, e.g. hppa glibc, vfork() is implemented using fork
syscall, so the test cannot rely on the parent process remaining blocked
until the child process either terminates or calls execve.

* tests/vfork-f.c (main): Explicitly block the parent until the child
either terminates or calls execve.

Fix and enhance decoding of sched_[gs]etaffinity syscalls

Print cpu_set_t as a set of integers, similar to the way
fd_set is printed as a set of descriptors.

* affinity.c: Include <sched.h>.
(get_cpuset_size): New function.
(print_affinitylist): Rewrite using get_cpuset_size and next_set_bit.
(sched_getaffinity, sched_setaffinity): Print first two args as ints.
* NEWS: Mention this enhancement.
* tests/sched_xetaffinity.c: New file.
* tests/sched_xetaffinity.test: New test.
* tests/Makefile.am (check_PROGRAMS): Add sched_xetaffinity.
(TESTS): Add sched_xetaffinity.test.
* tests/.gitignore: Add sched_xetaffinity.

Reported-by: Joe Korty <joe.korty@ccur.com>

tests: convert epoll_create1.test from match_grep to match_diff

* tests/epoll_create1.c (main): Print expected output.
* tests/epoll_create1.test: Use match_diff instead of match_grep.
* tests/epoll_create1.expected: Remove.
* tests/Makefile.am (EXTRA_DIST): Remove epoll_create1.expected.

tests/struct_flock.c: use libtests

* tests/struct_flock.c (create_sample): Return void,
all callers changed.  Use perror_msg_and_fail.
* tests/fcntl.c: Use SKIP_MAIN_UNDEFINED.
* tests/fcntl64.c: Likewise.

tests/file_handle.c: use libtests

* tests/file_handle.c: Use SKIP_MAIN_UNDEFINED.
(main): Use assert and perror_msg_and_skip.

tests/uid32.c: use libtests

* tests/uid32.c: Use SKIP_MAIN_UNDEFINED.

tests/uid16.c: use libtests

* tests/uid16.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_skip.

tests/uid.c: use libtests

* tests/uid.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_skip.

tests/netlink_unix_diag.c: use libtests

* tests/netlink_unix_diag.c (send_query, check_responses, main):
Use perror_msg_and_skip.

tests/netlink_inet_diag.c: use libtests

* tests/netlink_inet_diag.c (send_query, check_responses, main):
Use perror_msg_and_skip.

tests/readdir.c: use libtests

* tests/readdir.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_skip.

tests/getdents64.c: use libtests

* tests/getdents64.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_skip.

tests/getdents.c: use libtests

* tests/getdents.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_skip.

tests/ipc_shm.c: use libtests

* tests/ipc_shm.c (cleanup): New function.
(main): Use it and perror_msg_and_skip.

tests/ipc_sem.c: use libtests

* tests/ipc_sem.c (cleanup): New function.
(main): Use it and perror_msg_and_skip.

tests/ipc_msg.c: use libtests

* tests/ipc_msg.c (cleanup): New function.
(main): Use it and perror_msg_and_skip.

tests/ipc_msgbuf.c: use libtests

* tests/ipc_msgbuf.c (cleanup): New function.
(main): Use it and perror_msg_and_skip.

tests/mq.c: use libtests

* tests/mq.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_skip.

tests/utimensat.c: use libtests

* tests/utimensat.c: Use SKIP_MAIN_UNDEFINED.
(main): Use assert and perror_msg_and_skip.

tests/ppoll.c: use libtests

* tests/ppoll.c (main): Use assert, perror_msg_and_skip,
and perror_msg_and_fail.

tests/mmsg.c: use libtests

* tests/mmsg.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_skip.

tests/ip_mreq.c: use libtests

* tests/ip_mreq.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_skip.

tests/ioctl.c: use libtests

* tests/ioctl.c: Use SKIP_MAIN_UNDEFINED.
(main): Use %m printf format specifier.

tests/pipe.c: use libtests

* tests/pipe.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_fail and perror_msg_and_skip.

tests/getrandom.c: use libtests

* tests/getrandom.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_skip.

tests/signalfd.c: use libtests

* tests/signalfd.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_skip.

tests/pc.c: use libtests

* tests/pc.c (main): Use assert, get_page_size, perror_msg_and_fail,
and perror_msg_and_skip.

tests/uio.c: use libtests

* tests/uio.c: Use SKIP_MAIN_UNDEFINED.

tests/bpf.c: use libtests

* tests/bpf.c: Use SKIP_MAIN_UNDEFINED.
(main) Use perror_msg_and_skip.

tests/aio.c: use libtests

* tests/aio.c: Use SKIP_MAIN_UNDEFINED.
(main) Use perror_msg_and_skip.

tests/sched_xetattr.c: use libtests

* tests/sched_xetattr.c: Use SKIP_MAIN_UNDEFINED.
(main) Use perror_msg_and_skip.

tests/wait.c: use libtests

* tests/wait.c (main): Use perror_msg_and_fail.

tests/vfork-f.c: use libtests

* tests/vfork-f.c (main): Use assert and perror_msg_and_fail.

tests/fork-f.c: use libtests

* tests/fork-f.c (main): Use assert and perror_msg_and_fail.

tests/userfaultfd.c: use libtests

* tests/userfaultfd.c: Use SKIP_MAIN_UNDEFINED.
(main): Use assert.

tests/mlock2.c: use libtests

* tests/mlock2.c: Use SKIP_MAIN_UNDEFINED.
(main): Use assert.

tests/membarrier.c: use libtests

* tests/membarrier.c: Use SKIP_MAIN_UNDEFINED.
(main): Use assert.

tests/nanosleep.c: use libtests

* tests/nanosleep.c (main): Use assert, perror_msg_and_fail,
and perror_msg_and_skip.

tests/timerfd_xettime.c: use libtests

* tests/timerfd_xettime.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_skip.

tests/timer_xettime.c: use libtests

* tests/timer_xettime.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_skip.

tests/timer_create.c: use libtests

* tests/timer_create.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_skip.

tests/clock_xettime.c: use libtests

* tests/clock_xettime.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_skip.

tests/clock_nanosleep.c: use libtests

* tests/clock_nanosleep.c (main): Use assert and perror_msg_and_skip.

tests/truncate64.c: use libtests

* tests/truncate64.c: Use SKIP_MAIN_UNDEFINED.
(main): Use assert and perror_msg_and_skip.

tests/truncate.c: use libtests

* tests/truncate.c: Use SKIP_MAIN_UNDEFINED.
(main): Use assert and perror_msg_and_skip.

tests/ftruncate64.c: use libtests

* tests/ftruncate64.c: Use SKIP_MAIN_UNDEFINED.
(main): Use assert and perror_msg_and_skip.

tests/ftruncate.c: use libtests

* tests/ftruncate.c: Use SKIP_MAIN_UNDEFINED.
(main): Use assert and perror_msg_and_skip.

tests/llseek.c: use libtests

* tests/llseek.c: Use SKIP_MAIN_UNDEFINED.
(main): Use assert and perror_msg_and_skip.

tests/lseek.c: use libtests

* tests/lseek.c: Use SKIP_MAIN_UNDEFINED.
(main): Use assert and perror_msg_and_skip.

tests/readlinkat.c: use libtests

* tests/readlinkat.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_skip.

tests/readlink.c: use libtests

* tests/readlink.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_skip.

tests/xattr.c: use libtests

* tests/xattr.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_skip.

tests/seccomp.c: use libtests

* tests/seccomp.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_fail and perror_msg_and_skip.

tests/restart_syscall.c: use libtests

* tests/restart_syscall.c (main): Use assert, perror_msg_and_fail,
and perror_msg_and_skip.

tests/inet-cmsg.c: use libtests

* tests/inet-cmsg.c (main): Use perror_msg_and_skip.

tests/eventfd.c: use libtests

* tests/eventfd.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_skip.

tests/epoll_create1.c: use libtests

* tests/epoll_create1.c: Use SKIP_MAIN_UNDEFINED.
(main): Use assert and perror_msg_and_skip.

tests/mmap.c: use libtests

* tests/mmap.c (main): Use get_page_size and perror_msg_and_fail.

tests/fanotify_mark.c: use libtests

* tests/fanotify_mark.c: Use SKIP_MAIN_UNDEFINED.

tests/inet-accept-connect-send-recv.c: use libtests

* tests/inet-accept-connect-send-recv.c (main): Use perror_msg_and_skip
and perror_msg_and_fail.

tests/net-accept-connect.c: use libtests

* tests/net-accept-connect.c (main): Use perror_msg_and_skip
and perror_msg_and_fail.

tests/unix-pair-send-recv.c: use libtests

* tests/unix-pair-send-recv.c (main): Use perror_msg_and_skip
and perror_msg_and_fail.

tests/xselect.c: use libtests

* tests/xselect.c (main): Use assert, perror_msg_and_fail,
and perror_msg_and_skip.

tests/pselect6.c: use libtests

* tests/pselect6.c: Use SKIP_MAIN_UNDEFINED.
(main): Use assert, perror_msg_and_fail, and perror_msg_and_skip.

tests/oldselect.c: use libtests

* tests/oldselect.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_fail and perror_msg_and_skip.

tests/select.c: use libtests

* tests/select.c: Use SKIP_MAIN_UNDEFINED.

tests/_newselect.c: use libtests

* tests/_newselect.c: Use SKIP_MAIN_UNDEFINED.

tests/fstatat.c: use libtests

* tests/fstatat.c: Use SKIP_MAIN_UNDEFINED.

tests/newfstatat.c: use libtests

* tests/newfstatat.c: Use SKIP_MAIN_UNDEFINED.

tests/fstatat64.c: use libtests

* tests/fstatat64.c: Use SKIP_MAIN_UNDEFINED.

tests/xstatx.c: use libtests

* tests/xstatx.c: Use SKIP_MAIN_UNDEFINED.

tests/stat64.c: use libtests

* tests/stat64.c: Use SKIP_MAIN_UNDEFINED.

tests/stat.c: use libtests

* tests/stat.c: Use SKIP_MAIN_UNDEFINED.

tests/lstat64.c: use libtests

* tests/lstat64.c: Use SKIP_MAIN_UNDEFINED.

tests/lstat.c: use libtests

* tests/lstat.c: Use SKIP_MAIN_UNDEFINED.

tests/fstat64.c: use libtests

* tests/fstat64.c: Use SKIP_MAIN_UNDEFINED.

tests/fstat.c: use libtests

* tests/fstat.c: Use SKIP_MAIN_UNDEFINED.

tests/statfs.c: use libtests

* tests/statfs.c (main): Use perror_msg_and_fail.

tests/xettimeofday.c: use libtests

* tests/xettimeofday.c (main): Use assert and perror_msg_and_skip.

tests/utime.c: use libtests

* tests/utime.c (main): Use assert and perror_msg_and_skip.

tests/filter-unavailable.c: use libtests

* tests/filter-unavailable.c (main): Use perror_msg_and_fail.

tests/scm_rights.c: use libtests

* tests/scm_rights.c (main): Use perror_msg_and_fail and perror_msg_and_skip.

tests/caps.c: use libtests

* tests/caps.c (main): Use perror_msg_and_skip.

tests/rt_sigqueueinfo.c: use libtests

* tests/rt_sigqueueinfo.c (main): Use assert and perror_msg_and_skip.

tests/umount.c: use libtests

* tests/umount.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_fail.

tests/umount2.c: use libtests

* tests/umount2.c (main): Use perror_msg_and_fail.

tests/times.c: use libtests

* tests/times.c (main): Use perror_msg_and_fail and perror_msg_and_skip.

tests/times-fail.c: use assert

* tests/times-fail.c (main): Use assert.

tests/memfd_create.c: use libtests

* tests/memfd_create.c: Use SKIP_MAIN_UNDEFINED.

tests/execveat.c: use libtests

* tests/execveat.c: Use SKIP_MAIN_UNDEFINED.

tests/xetitimer.c: use libtests

* tests/xetitimer.c (main): Use perror_msg_and_skip.

tests/sysinfo.c: use libtests

* tests/sysinfo.c (main): Use perror_msg_and_skip.

tests/sigaltstack.c: use libtests

* tests/sigaltstack.c (main): Use perror_msg_and_skip.

tests/adjtimex.c: use libtests

* tests/adjtimex.c (main): Use perror_msg_and_skip.

tests/xet_robust_list.c: use libtests

* tests/xet_robust_list.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_skip and tail_alloc.

tests/umovestr2.c: use libtests

* tests/umovestr2.c (main): Use get_page_size and tail_alloc.

tests/umovestr.c: use libtests

* tests/umovestr.c (main): Use perror_msg_and_skip and tail_alloc.

tests/time.c: use libtests

* tests/time.c: Use SKIP_MAIN_UNDEFINED.
(main): Use perror_msg_and_skip and tail_alloc.