$ strace plymouth --ping execve("/bin/plymouth", ["plymouth", "--ping"], [/* 69 vars */]) = 0 brk(NULL) = 0x5574f5d8f000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap(NULL, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbbec05e000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=100385, ...}) = 0 mmap(NULL, 100385, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fbbec045000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libply.so.4", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0000E\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0644, st_size=88632, ...}) = 0 mmap(NULL, 2185728, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fbbebc24000 mprotect(0x7fbbebc39000, 2093056, PROT_NONE) = 0 mmap(0x7fbbebe38000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x14000) = 0x7fbbebe38000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340\22\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1960656, ...}) = 0 mmap(NULL, 4061792, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fbbeb844000 mprotect(0x7fbbeba1a000, 2097152, PROT_NONE) = 0 mmap(0x7fbbebc1a000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1d6000) = 0x7fbbebc1a000 mmap(0x7fbbebc20000, 14944, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fbbebc20000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) openat(AT_FDCWD, "/lib/x86_64-linux-gnu/librt.so.1", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0\"\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0644, st_size=31744, ...}) = 0 mmap(NULL, 2128864, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fbbeb63c000 mprotect(0x7fbbeb643000, 2093056, PROT_NONE) = 0 mmap(0x7fbbeb842000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0x7fbbeb842000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\220\16\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0644, st_size=14632, ...}) = 0 mmap(NULL, 2109712, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fbbeb438000 mprotect(0x7fbbeb43b000, 2093056, PROT_NONE) = 0 mmap(0x7fbbeb63a000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7fbbeb63a000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360a\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=144776, ...}) = 0 mmap(NULL, 2221160, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fbbeb219000 mprotect(0x7fbbeb233000, 2093056, PROT_NONE) = 0 mmap(0x7fbbeb432000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x19000) = 0x7fbbeb432000 mmap(0x7fbbeb434000, 13416, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fbbeb434000 close(3) = 0 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbbec043000 arch_prctl(ARCH_SET_FS, 0x7fbbec044480) = 0 mprotect(0x7fbbebc1a000, 16384, PROT_READ) = 0 mprotect(0x7fbbeb432000, 4096, PROT_READ) = 0 mprotect(0x7fbbeb63a000, 4096, PROT_READ) = 0 mprotect(0x7fbbeb842000, 4096, PROT_READ) = 0 mprotect(0x7fbbebe38000, 4096, PROT_READ) = 0 mprotect(0x5574f51d8000, 4096, PROT_READ) = 0 mprotect(0x7fbbec061000, 4096, PROT_READ) = 0 munmap(0x7fbbec045000, 100385) = 0 set_tid_address(0x7fbbec044750) = 5896 set_robust_list(0x7fbbec044760, 24) = 0 rt_sigaction(SIGRTMIN, {sa_handler=0x7fbbeb21ec70, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7fbbeb22c150}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7fbbeb21ed00, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fbbeb22c150}, NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[PIPE], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fbbeb87b140}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 brk(NULL) = 0x5574f5d8f000 brk(0x5574f5db0000) = 0x5574f5db0000 epoll_create1(EPOLL_CLOEXEC) = 3 pipe2([4, 5], O_CLOEXEC) = 0 epoll_ctl(3, EPOLL_CTL_ADD, 4, {EPOLLERR|EPOLLHUP, {u32=4124635968, u64=93960829203264}}) = 0 epoll_ctl(3, EPOLL_CTL_MOD, 4, {EPOLLIN|EPOLLERR|EPOLLHUP, {u32=4124635968, u64=93960829203264}}) = 0 openat(AT_FDCWD, "/proc/cmdline", O_RDONLY) = 6 read(6, "BOOT_IMAGE=/vmlinuz-4.13.0-19-ge"..., 4096) = 111 close(6) = 0 socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0) = 6 setsockopt(6, SOL_SOCKET, SO_PASSCRED, [1], 4) = 0 connect(6, {sa_family=AF_UNIX, sun_path=@"/org/freedesktop/plymouthd"}, 29) = 0 epoll_ctl(3, EPOLL_CTL_ADD, 6, {EPOLLERR|EPOLLHUP, {u32=4124651280, u64=93960829218576}}) = 0 epoll_ctl(3, EPOLL_CTL_MOD, 6, {EPOLLERR|EPOLLHUP, {u32=4124651280, u64=93960829218576}}) = 0 epoll_ctl(3, EPOLL_CTL_MOD, 6, {EPOLLOUT|EPOLLERR|EPOLLHUP, {u32=4124651280, u64=93960829218576}}) = 0 epoll_pwait(3, [{EPOLLOUT, {u32=4124651280, u64=93960829218576}}], 64, -1, NULL, 8) = 1 sendto(6, "P\0", 2, MSG_NOSIGNAL, NULL, 0) = 2 epoll_ctl(3, EPOLL_CTL_MOD, 6, {EPOLLIN|EPOLLOUT|EPOLLERR|EPOLLHUP, {u32=4124651280, u64=93960829218576}}) = 0 epoll_ctl(3, EPOLL_CTL_MOD, 6, {EPOLLIN|EPOLLERR|EPOLLHUP, {u32=4124651280, u64=93960829218576}}) = 0 epoll_pwait(3,