tests: fix clang "duplicate 'const' declaration specifier" warnings

* tests/ksysent.c (pstr_t): Remove second const specifier.
* tests/mmsg.c (main): Remove second const specifier from one[], two[],
and three[].

tests/times.c: fix clang compilation warning

* tests/times.c (main): Initialize dummy variable.

tests/mmsg.c: fix build on rhel6/ppc

There are weird platforms that define __NR_sendmmsg but at the same time
do not define __NR_recvmmsg.  Add a workaround for them.

* configure.ac (AC_CHECK_FUNCS): Add recvmmsg.
* tests/mmsg.c: Check for __NR_recvmmsg || HAVE_RECVMMSG.

s390: fix sigreturn decoding on recent kernels

Linux kernel commit v4.3-rc1-50-g8d4bd0e corrected uc_sigmask
of the compat signal frame, so remove the old workaround.

* linux/s390/arch_sigreturn.c (arch_sigreturn) [S390]: Remove.

Update PTRACE_* constants

* ptrace.h (PTRACE_SECCOMP_GET_FILTER): Define.
* xlat/ptrace_cmds.in: Add PTRACE_SECCOMP_GET_FILTER.

Fix struct sigevent decoding for musl

Do not rely on "struct sigevent.__pad" being located at the same address
as "struct sigevent.sigev_notify_thread_id", it's not the case with musl
libc.  Do not rely on struct sigevent definition at all to access
sigev_notify_thread_id.

* configure.ac (AC_CHECK_MEMBERS): Remove struct sigevent._sigev_un._pad
and struct sigevent.__pad.
* sigevent.h: New file.
* Makefile.am (strace_SOURCES): Add it.
* print_sigevent.c: Include it.
* print_sigevent.c (struct_sigevent): Remove.
(print_sigevent): Update all struct_sigevent users.
* tests/timer_create.c: Include "sigevent.h".
(main): Use struct_sigevent instead of struct sigevent,
all struct sigevent clients changed.

syscall.c: include <signal.h>

All users of NSIG macro must include <signal.h>.
This complements commit v4.10-184-g0e946ab.

* syscall.c: Include <signal.h>.

signal.c: fix musl libc compilation warning

musl libc defines SIGRTMAX to a function that returns signed int,
which obviously makes gcc -Wsign-compare unhappy.

* signal.c (signame): Cast ASM_SIGRTMAX to unsigned int.

tests: fix TEST_SYSCALL_{NR,STR} and STRUCT_STAT_STR macros for musl

The contents of TEST_SYSCALL_NAME and STRUCT_STAT macros was subject
to macro expansion when used in definitions of TEST_SYSCALL_NR,
TEST_SYSCALL_STR, and STRUCT_STAT_STR macros.

As some libcs, e.g. musl libc, define lfs64 names as macros
(stat64 as stat, lstat64 as lstat, etc.), this might result to incorrect
expansion of TEST_SYSCALL_NR, TEST_SYSCALL_STR, and STRUCT_STAT_STR
macros.  To avoid this problem, define these macros directly and remove
TEST_SYSCALL_NAME macro.

* tests/_newselect.c (TEST_SYSCALL_NAME): Remove.
(TEST_SYSCALL_NR, TEST_SYSCALL_STR): New macros.
* tests/fcntl.c: Likewise.
* tests/fcntl64.c: Likewise.
* tests/fstat.c: Likewise.
* tests/fstatat64.c: Likewise.
* tests/lstat.c: Likewise.
* tests/newfstatat.c: Likewise.
* tests/select.c: Likewise.
* tests/stat.c: Likewise.
* tests/fstat64.c (TEST_SYSCALL_NAME): Remove.
(TEST_SYSCALL_NR, TEST_SYSCALL_STR, STRUCT_STAT_STR): New macros.
* tests/lstat64.c: Likewise.
* tests/stat64.c: Likewise.
* tests/fstatx.c (TEST_SYSCALL_NR, nrify, nrify_): Remove.
* tests/lstatx.c: Likewise.
* tests/struct_flock.c (TEST_SYSCALL_NR, TEST_SYSCALL_STR, nrify,
nrify_, stringify, stringify_): Remove.
* tests/xselect.c: Likewise.
* tests/xstatx.c: Check TEST_SYSCALL_STR instead of TEST_SYSCALL_NAME.
(STRUCT_STAT_STR, TEST_SYSCALL_STR, stringify, stringify_): Remove.
[!STRUCT_STAT] (STRUCT_STAT_STR): New macro.

tests/struct_flock.c: fix musl libc compilation warnings

The size of off_t is not something one can rely upon.  For example,
musl libc unconditionally defines it as an int64_t type on x86.
A cast to the target type helps to avoid these libc differences.

* configure.ac: Call AC_C_TYPEOF.
* tests/struct_flock.c (TYPEOF_FLOCK_OFF_T): New macro.
(test_flock_einval): Use it instead of off_t.

tests/inet-cmsg.c: fix musl libc compilation warnings

The types that are used to define msg_namelen member of struct msghdr
and cmsg_len member of struct cmsghdr differ between libcs.
For example, glibc defines them as size_t, while musl libc - as type
socklen_t.  Print these fields using %lu format to avoid issues caused
by libc differences.

* tests/inet-cmsg.c (main): Cast mh.msg_controllen and c->cmsg_len
to unsigned long and print them using %lu format.

aio.test: include <fcntl.h> instead of <sys/fcntl.h>

* tests/aio.c: Include <fcntl.h> instead of <sys/fcntl.h>.

mmsg.test: check memory access by sendmmsg and recvmmsg decoders

* tests/tests.h (tail_memdup): New prototype.
* tests/tail_alloc.c (tail_memdup): New function.
* tests/mmsg.c (main): Place all objects passed to sendmmsg and recvmmsg
at the end of memory pages followed by inaccessible pages.

mmsg.test: check decoding of flags passed to sendmmsg and recvmmsg

* tests/mmsg.c (main): Pass MSG_DONTROUTE|MSG_NOSIGNAL to sendmmsg.
Pass MSG_DONTWAIT to recvmmsg.
* tests/mmsg.expected: Update.

mmsg.test: prefer direct sendmmsg/recvmmsg syscalls to libc wrappers

* tests/mmsg.c: Include <sys/syscall.h>.
Check for __NR_sendmmsg as an alternative to HAVE_SENDMMSG.
[!HAVE_STRUCT_MMSGHDR] (struct mmsghdr): Define.
(send_mmsg, recv_mmsg): New functions.
(main): Use them instead of sendmmsg and recvmmsg.

Reported-by: Szabolcs Nagy <nsz@port70.net>

sigreturn.test: use RT_5 signal number instead of RT_2

Make the test compatible with musl libc that uses RT_2 internally.

* tests/sigreturn.c (main): Replace RT_2 with RT_5.
* tests/sigreturn.test: Likewise.

Reported-by: Szabolcs Nagy <nsz@port70.net>

avr32: wire up accept4 syscall

* linux/avr32/syscallent.h [321]: Add accept4 entry.

sparc64: fix names of {s,g}etres{u,g}id syscalls

* linux/sparc64/syscallent.h [108 ... 111]: Use sparc64 syscall names.

sparc64: remove sparc32 syscall entries

* linux/sparc64/syscallent.h [31, 32, 35, 44, 53, 56, 69, 70, 72, 77,
82, 84, 87, 89, 91, 94, 112, 115, 155, 231]: Unassign.

sparc: remove sparc64 syscall entries

* linux/sparc/syscallent.h [52, 163]: Unassign.

sparc64: clone syscallent.h from sparc

* linux/sparc64/syscallent.h: Clone from linux/sparc/syscallent.h.

sparc: fix mlock2 sysentry, wire up bind, listen, and setsockopt syscalls

* linux/sparc/syscallent.h [353]: Move mlock2 entry to 356.
[353, 354, 355]: Add bind, listen, and setsockopt entries.
* NEWS: Mention this.

tests: do not use settimeofday wrapper provided by libc

Workaround limitations of settimeofday wrapper provided by musl libc.

* tests/xettimeofday.c (main): Call settimeofday using syscall().

Reported-by: Szabolcs Nagy <nsz@port70.net>

ioctl.test: robustify against libcs invoking ioctl syscall on their own

* tests/ioctl.test: Filter out from the log ioctl calls with standard
descriptor arguments.

Reported-by: Szabolcs Nagy <nsz@port70.net>

alpha: enhance decoding of getxpid, getxuid, and getxgid syscalls

Print the second return value of getxpid, getxuid, and getxgid syscalls
that return a pair of values using the same mechanism as pipe syscall.

* alpha.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* linux/alpha/syscallent.h [20]: Change SEN(getpid) to SEN(getxpid).
[24]: Change SEN(getuid) to SEN(getxuid).
[47]: Change SEN(getgid) to SEN(getxgid).
* NEWS: Mention this enhancement.
* tests/uid.awk: Update for getxgid output change.
* tests/uid.test: Cleanup.
* tests/getxxid.c: New file.
* tests/getxxid.test: New test.
* tests/Makefile.am (check_PROGRAMS): Add getxxid.
(TESTS): Add getxxid.test.
* tests/.gitignore: Add getxxid.

Cleanup parser of getpagesize syscall

* mem.c (SYS_FUNC(getpagesize)): Decode on entering syscall.

alpha: alias getdtablesize to printargs

* linux/dummy.h [ALPHA] (sys_getdtablesize): Alias to printargs.
* desc.c [ALPHA] (SYS_FUNC(getdtablesize)): Remove.

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.