Strace for version with non existing command die

strace_with_die_musl_amd64.log (text/plain), 55.47 KB, created by Ed Wildgoose on 2021-04-22 18:24:41 UTC

execve("/bin/bash", ["bash", "/tmp/test2.sh"], 0x7ffedf8b65f8 /* 34 vars */) = 0
arch_prctl(ARCH_SET_FS, 0x7fe83fa8ea88) = 0
set_tid_address(0x7fe83fa8f034)         = 8992
brk(NULL)                               = 0x56552a4a3000
brk(0x56552a4a5000)                     = 0x56552a4a5000
mmap(0x56552a4a3000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x56552a4a3000
open("/etc/ld-musl-x86_64.path", O_RDONLY|O_CLOEXEC) = 3
fcntl(3, F_SETFD, FD_CLOEXEC)           = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f9de000
fcntl(3, F_SETFD, FD_CLOEXEC)           = 0
read(3, "/usr/lib/gcc/x86_64-gentoo-linux"..., 1024) = 91
read(3, "", 1024)                       = 0
close(3)                                = 0
munmap(0x7fe83f9de000, 4096)            = 0
open("/usr/lib/gcc/x86_64-gentoo-linux-musl/9.3.0/libreadline.so.8", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/lib/libreadline.so.8", O_RDONLY|O_CLOEXEC) = 3
fcntl(3, F_SETFD, FD_CLOEXEC)           = 0
fstat(3, {st_mode=S_IFREG|0755, st_size=326248, ...}) = 0
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\260x\1\0\0\0\0\0"..., 960) = 960
mmap(NULL, 335872, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fe83f98d000
mmap(0x7fe83f9a3000, 163840, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0x16000) = 0x7fe83f9a3000
mmap(0x7fe83f9cb000, 36864, PROT_READ, MAP_PRIVATE|MAP_FIXED, 3, 0x3e000) = 0x7fe83f9cb000
mmap(0x7fe83f9d5000, 40960, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x47000) = 0x7fe83f9d5000
mmap(0x7fe83f9de000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fe83f9de000
close(3)                                = 0
open("/usr/lib/gcc/x86_64-gentoo-linux-musl/9.3.0/libtinfo.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/lib/libtinfo.so.6", O_RDONLY|O_CLOEXEC) = 3
fcntl(3, F_SETFD, FD_CLOEXEC)           = 0
fstat(3, {st_mode=S_IFREG|0755, st_size=244544, ...}) = 0
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340\374\0\0\0\0\0\0"..., 960) = 960
mmap(NULL, 249856, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fe83f950000
mmap(0x7fe83f95f000, 98304, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0xf000) = 0x7fe83f95f000
mmap(0x7fe83f977000, 65536, PROT_READ, MAP_PRIVATE|MAP_FIXED, 3, 0x27000) = 0x7fe83f977000
mmap(0x7fe83f988000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x37000) = 0x7fe83f988000
close(3)                                = 0
open("/usr/lib/gcc/x86_64-gentoo-linux-musl/9.3.0/libtinfow.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/lib/libtinfow.so.6", O_RDONLY|O_CLOEXEC) = 3
fcntl(3, F_SETFD, FD_CLOEXEC)           = 0
fstat(3, {st_mode=S_IFREG|0755, st_size=244576, ...}) = 0
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0\375\0\0\0\0\0\0"..., 960) = 960
mmap(NULL, 249856, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fe83f913000
mmap(0x7fe83f922000, 98304, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0xf000) = 0x7fe83f922000
mmap(0x7fe83f93a000, 65536, PROT_READ, MAP_PRIVATE|MAP_FIXED, 3, 0x27000) = 0x7fe83f93a000
mmap(0x7fe83f94b000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x37000) = 0x7fe83f94b000
close(3)                                = 0
mprotect(0x7fe83f9d5000, 12288, PROT_READ) = 0
mprotect(0x7fe83f988000, 16384, PROT_READ) = 0
mprotect(0x7fe83fa8b000, 4096, PROT_READ) = 0
mprotect(0x7fe83f94b000, 16384, PROT_READ) = 0
mprotect(0x56552a35b000, 12288, PROT_READ) = 0
open("/dev/tty", O_RDWR|O_NONBLOCK)     = 3
close(3)                                = 0
getuid()                                = 0
getgid()                                = 0
geteuid()                               = 0
getegid()                               = 0
rt_sigprocmask(SIG_SETMASK, NULL, [], 8) = 0
ioctl(-1, TIOCGPGRP, 0x7fffb05256ec)    = -1 EBADF (Bad file descriptor)
rt_sigaction(SIGCHLD, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigaction(SIGINT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7fe83fa53093}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGINT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7fe83fa53093}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigaction(SIGQUIT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7fe83fa53093}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGQUIT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7fe83fa53093}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigaction(SIGTSTP, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7fe83fa53093}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGTSTP, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7fe83fa53093}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigaction(SIGTTIN, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7fe83fa53093}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGTTIN, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7fe83fa53093}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigaction(SIGTTOU, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7fe83fa53093}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGTTOU, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7fe83fa53093}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
rt_sigaction(SIGQUIT, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7fe83fa53093}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7fe83fa53093}, 8) = 0
uname({sysname="Linux", nodename="grunt", ...}) = 0
mmap(NULL, 28672, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f90c000
mmap(NULL, 16384, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f908000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f907000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f906000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f905000
stat("/var/embedded", {st_mode=S_IFDIR|0755, st_size=76, ...}) = 0
stat(".", {st_mode=S_IFDIR|0755, st_size=76, ...}) = 0
stat("/var", {st_mode=S_IFDIR|0755, st_size=141, ...}) = 0
stat("/var/embedded", {st_mode=S_IFDIR|0755, st_size=76, ...}) = 0
stat("/var/embedded/portage/repos/tpb", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
getpid()                                = 8992
getppid()                               = 8989
stat(".", {st_mode=S_IFDIR|0755, st_size=76, ...}) = 0
stat("/usr/local/sbin/bash", 0x7fffb05252a0) = -1 ENOENT (No such file or directory)
stat("/usr/local/bin/bash", 0x7fffb05252a0) = -1 ENOENT (No such file or directory)
stat("/usr/sbin/bash", 0x7fffb05252a0)  = -1 ENOENT (No such file or directory)
stat("/usr/bin/bash", 0x7fffb05252a0)   = -1 ENOENT (No such file or directory)
stat("/sbin/bash", 0x7fffb05252a0)      = -1 ENOENT (No such file or directory)
stat("/bin/bash", {st_mode=S_IFREG|0755, st_size=813120, ...}) = 0
getuid()                                = 0
geteuid()                               = 0
getgid()                                = 0
getegid()                               = 0
faccessat(AT_FDCWD, "/bin/bash", X_OK)  = 0
getuid()                                = 0
geteuid()                               = 0
getgid()                                = 0
getegid()                               = 0
faccessat(AT_FDCWD, "/bin/bash", R_OK)  = 0
stat("/bin/bash", {st_mode=S_IFREG|0755, st_size=813120, ...}) = 0
getuid()                                = 0
geteuid()                               = 0
getgid()                                = 0
getegid()                               = 0
faccessat(AT_FDCWD, "/bin/bash", X_OK)  = 0
getuid()                                = 0
geteuid()                               = 0
getgid()                                = 0
getegid()                               = 0
faccessat(AT_FDCWD, "/bin/bash", R_OK)  = 0
getpid()                                = 8992
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f904000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f903000
getpgid(0)                              = 8989
ioctl(2, TIOCGPGRP, 0x7fffb05255ac)     = -1 ENOTTY (Not a tty)
rt_sigprocmask(SIG_UNBLOCK, [RT_1 RT_2], NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, 8) = 0
ioctl(2, TIOCGPGRP, 0x7fffb052558c)     = -1 ENOTTY (Not a tty)
prlimit64(0, RLIMIT_NPROC, NULL, {rlim_cur=256881, rlim_max=256881}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f902000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f901000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f900000
rt_sigprocmask(SIG_SETMASK, NULL, [], 8) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8ff000
open("/tmp/test2.sh", O_RDONLY)         = 3
stat("/tmp/test2.sh", {st_mode=S_IFREG|0644, st_size=88, ...}) = 0
ioctl(3, TIOCGWINSZ, 0x7fffb05256f8)    = -1 ENOTTY (Not a tty)
lseek(3, 0, SEEK_CUR)                   = 0
read(3, "while read d < <(find /tmp/test "..., 80) = 80
lseek(3, 0, SEEK_SET)                   = 0
prlimit64(0, RLIMIT_NOFILE, NULL, {rlim_cur=1024, rlim_max=4*1024}) = 0
fcntl(255, F_GETFD)                     = -1 EBADF (Bad file descriptor)
dup2(3, 255)                            = 255
close(3)                                = 0
fcntl(255, F_SETFD, FD_CLOEXEC)         = 0
fcntl(255, F_GETFL)                     = 0x8000 (flags O_RDONLY|O_LARGEFILE)
fstat(255, {st_mode=S_IFREG|0644, st_size=88, ...}) = 0
lseek(255, 0, SEEK_CUR)                 = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8fd000
read(255, "while read d < <(find /tmp/test "..., 88) = 88
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
pipe([3, 4])                            = 0
fcntl(63, F_GETFD)                      = -1 EBADF (Bad file descriptor)
dup2(3, 63)                             = 63
close(3)                                = 0
prlimit64(0, RLIMIT_NOFILE, NULL, {rlim_cur=1024, rlim_max=4*1024}) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, ~[], [INT CHLD], 8) = 0
fork()                                  = 8993
rt_sigprocmask(SIG_SETMASK, [INT CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
close(4)                                = 0
open("/dev/fd/63", O_RDONLY)            = 3
fcntl(0, F_GETFD)                       = 0
fcntl(0, F_DUPFD, 10)                   = 10
fcntl(0, F_GETFD)                       = 0
fcntl(10, F_SETFD, FD_CLOEXEC)          = 0
dup2(3, 0)                              = 0
close(3)                                = 0
ioctl(0, TIOCGWINSZ, 0x7fffb0525148)    = -1 ENOTTY (Not a tty)
lseek(0, 0, SEEK_CUR)                   = -1 ESPIPE (Invalid seek)
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "m", 1)                         = 1
read(0, "p", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "e", 1)                         = 1
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=8993, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 8993
wait4(-1, 0x7fffb0524ad0, WNOHANG, NULL) = -1 ECHILD (No child process)
rt_sigreturn({mask=[]})                 = 1
read(0, "s", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "\n", 1)                        = 1
dup2(10, 0)                             = 0
fcntl(10, F_GETFD)                      = 0x1 (flags FD_CLOEXEC)
close(10)                               = 0
close(63)                               = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8fc000
writev(1, [{iov_base="/tmp/test/a/a", iov_len=13}, {iov_base="\n", iov_len=1}], 2/tmp/test/a/a
) = 14
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
pipe([3, 4])                            = 0
fcntl(63, F_GETFD)                      = -1 EBADF (Bad file descriptor)
dup2(3, 63)                             = 63
close(3)                                = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, ~[], [INT CHLD], 8) = 0
fork()                                  = 8995
rt_sigprocmask(SIG_SETMASK, [INT CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
close(4)                                = 0
open("/dev/fd/63", O_RDONLY)            = 3
fcntl(0, F_GETFD)                       = 0
fcntl(0, F_DUPFD, 10)                   = 10
fcntl(0, F_GETFD)                       = 0
fcntl(10, F_SETFD, FD_CLOEXEC)          = 0
dup2(3, 0)                              = 0
close(3)                                = 0
ioctl(0, TIOCGWINSZ, 0x7fffb0525148)    = -1 ENOTTY (Not a tty)
lseek(0, 0, SEEK_CUR)                   = -1 ESPIPE (Invalid seek)
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "m", 1)                         = 1
read(0, "p", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "e", 1)                         = 1
read(0, "s", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "\n", 1)                        = 1
dup2(10, 0)                             = 0
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=8995, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 8995
wait4(-1, 0x7fffb0524d50, WNOHANG, NULL) = -1 ECHILD (No child process)
rt_sigreturn({mask=[]})                 = 0
fcntl(10, F_GETFD)                      = 0x1 (flags FD_CLOEXEC)
close(10)                               = 0
close(63)                               = 0
writev(1, [{iov_base="/tmp/test/a/a", iov_len=13}, {iov_base="\n", iov_len=1}], 2/tmp/test/a/a
) = 14
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8fb000
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
pipe([3, 4])                            = 0
fcntl(63, F_GETFD)                      = -1 EBADF (Bad file descriptor)
dup2(3, 63)                             = 63
close(3)                                = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, ~[], [INT CHLD], 8) = 0
fork()                                  = 8997
rt_sigprocmask(SIG_SETMASK, [INT CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
close(4)                                = 0
open("/dev/fd/63", O_RDONLY)            = 3
fcntl(0, F_GETFD)                       = 0
fcntl(0, F_DUPFD, 10)                   = 10
fcntl(0, F_GETFD)                       = 0
fcntl(10, F_SETFD, FD_CLOEXEC)          = 0
dup2(3, 0)                              = 0
close(3)                                = 0
ioctl(0, TIOCGWINSZ, 0x7fffb0525148)    = -1 ENOTTY (Not a tty)
lseek(0, 0, SEEK_CUR)                   = -1 ESPIPE (Invalid seek)
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "m", 1)                         = 1
read(0, "p", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "e", 1)                         = 1
read(0, "s", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "\n", 1)                        = 1
dup2(10, 0)                             = 0
fcntl(10, F_GETFD)                      = 0x1 (flags FD_CLOEXEC)
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=8997, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 8997
wait4(-1, 0x7fffb0524d10, WNOHANG, NULL) = -1 ECHILD (No child process)
rt_sigreturn({mask=[]})                 = 1
close(10)                               = 0
close(63)                               = 0
writev(1, [{iov_base="/tmp/test/a/a", iov_len=13}, {iov_base="\n", iov_len=1}], 2/tmp/test/a/a
) = 14
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
pipe([3, 4])                            = 0
fcntl(63, F_GETFD)                      = -1 EBADF (Bad file descriptor)
dup2(3, 63)                             = 63
close(3)                                = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, ~[], [INT CHLD], 8) = 0
fork()                                  = 8999
rt_sigprocmask(SIG_SETMASK, [INT CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
close(4)                                = 0
open("/dev/fd/63", O_RDONLY)            = 3
fcntl(0, F_GETFD)                       = 0
fcntl(0, F_DUPFD, 10)                   = 10
fcntl(0, F_GETFD)                       = 0
fcntl(10, F_SETFD, FD_CLOEXEC)          = 0
dup2(3, 0)                              = 0
close(3)                                = 0
ioctl(0, TIOCGWINSZ, 0x7fffb0525148)    = -1 ENOTTY (Not a tty)
lseek(0, 0, SEEK_CUR)                   = -1 ESPIPE (Invalid seek)
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "m", 1)                         = 1
read(0, "p", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "e", 1)                         = 1
read(0, "s", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=8999, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 8999
wait4(-1, 0x7fffb0524ad0, WNOHANG, NULL) = -1 ECHILD (No child process)
rt_sigreturn({mask=[]})                 = 1
read(0, "\n", 1)                        = 1
dup2(10, 0)                             = 0
fcntl(10, F_GETFD)                      = 0x1 (flags FD_CLOEXEC)
close(10)                               = 0
close(63)                               = 0
writev(1, [{iov_base="/tmp/test/a/a", iov_len=13}, {iov_base="\n", iov_len=1}], 2/tmp/test/a/a
) = 14
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
pipe([3, 4])                            = 0
fcntl(63, F_GETFD)                      = -1 EBADF (Bad file descriptor)
dup2(3, 63)                             = 63
close(3)                                = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, ~[], [INT CHLD], 8) = 0
fork()                                  = 9001
rt_sigprocmask(SIG_SETMASK, [INT CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
close(4)                                = 0
open("/dev/fd/63", O_RDONLY)            = 3
fcntl(0, F_GETFD)                       = 0
fcntl(0, F_DUPFD, 10)                   = 10
fcntl(0, F_GETFD)                       = 0
fcntl(10, F_SETFD, FD_CLOEXEC)          = 0
dup2(3, 0)                              = 0
close(3)                                = 0
ioctl(0, TIOCGWINSZ, 0x7fffb0525148)    = -1 ENOTTY (Not a tty)
lseek(0, 0, SEEK_CUR)                   = -1 ESPIPE (Invalid seek)
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "m", 1)                         = 1
read(0, "p", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "e", 1)                         = 1
read(0, "s", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "\n", 1)                        = 1
dup2(10, 0)                             = 0
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=9001, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 9001
wait4(-1, 0x7fffb0524d50, WNOHANG, NULL) = -1 ECHILD (No child process)
rt_sigreturn({mask=[]})                 = 0
fcntl(10, F_GETFD)                      = 0x1 (flags FD_CLOEXEC)
close(10)                               = 0
close(63)                               = 0
writev(1, [{iov_base="/tmp/test/a/a", iov_len=13}, {iov_base="\n", iov_len=1}], 2/tmp/test/a/a
) = 14
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
pipe([3, 4])                            = 0
fcntl(63, F_GETFD)                      = -1 EBADF (Bad file descriptor)
dup2(3, 63)                             = 63
close(3)                                = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, ~[], [INT CHLD], 8) = 0
fork()                                  = 9003
rt_sigprocmask(SIG_SETMASK, [INT CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
close(4)                                = 0
open("/dev/fd/63", O_RDONLY)            = 3
fcntl(0, F_GETFD)                       = 0
fcntl(0, F_DUPFD, 10)                   = 10
fcntl(0, F_GETFD)                       = 0
fcntl(10, F_SETFD, FD_CLOEXEC)          = 0
dup2(3, 0)                              = 0
close(3)                                = 0
ioctl(0, TIOCGWINSZ, 0x7fffb0525148)    = -1 ENOTTY (Not a tty)
lseek(0, 0, SEEK_CUR)                   = -1 ESPIPE (Invalid seek)
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "m", 1)                         = 1
read(0, "p", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "e", 1)                         = 1
read(0, "s", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "\n", 1)                        = 1
dup2(10, 0)                             = 0
fcntl(10, F_GETFD)                      = 0x1 (flags FD_CLOEXEC)
close(10)                               = 0
close(63)                               = 0
brk(0x56552a4a6000)                     = 0x56552a4a6000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8fa000
munmap(0x7fe83f8fa000, 4096)            = 0
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=9003, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 9003
wait4(-1, 0x7fffb0524cd0, WNOHANG, NULL) = -1 ECHILD (No child process)
rt_sigreturn({mask=[]})                 = 0
writev(1, [{iov_base="/tmp/test/a/a", iov_len=13}, {iov_base="\n", iov_len=1}], 2/tmp/test/a/a
) = 14
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8fa000
munmap(0x7fe83f8fa000, 4096)            = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8fa000
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
pipe([3, 4])                            = 0
fcntl(63, F_GETFD)                      = -1 EBADF (Bad file descriptor)
dup2(3, 63)                             = 63
close(3)                                = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, ~[], [INT CHLD], 8) = 0
fork()                                  = 9005
rt_sigprocmask(SIG_SETMASK, [INT CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
close(4)                                = 0
open("/dev/fd/63", O_RDONLY)            = 3
fcntl(0, F_GETFD)                       = 0
fcntl(0, F_DUPFD, 10)                   = 10
fcntl(0, F_GETFD)                       = 0
fcntl(10, F_SETFD, FD_CLOEXEC)          = 0
dup2(3, 0)                              = 0
close(3)                                = 0
ioctl(0, TIOCGWINSZ, 0x7fffb0525148)    = -1 ENOTTY (Not a tty)
lseek(0, 0, SEEK_CUR)                   = -1 ESPIPE (Invalid seek)
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "m", 1)                         = 1
read(0, "p", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "e", 1)                         = 1
read(0, "s", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "\n", 1)                        = 1
dup2(10, 0)                             = 0
fcntl(10, F_GETFD)                      = 0x1 (flags FD_CLOEXEC)
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=9005, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 9005
wait4(-1, 0x7fffb0524d10, WNOHANG, NULL) = -1 ECHILD (No child process)
rt_sigreturn({mask=[]})                 = 1
close(10)                               = 0
close(63)                               = 0
writev(1, [{iov_base="/tmp/test/a/a", iov_len=13}, {iov_base="\n", iov_len=1}], 2/tmp/test/a/a
) = 14
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
pipe([3, 4])                            = 0
fcntl(63, F_GETFD)                      = -1 EBADF (Bad file descriptor)
dup2(3, 63)                             = 63
close(3)                                = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, ~[], [INT CHLD], 8) = 0
fork()                                  = 9007
rt_sigprocmask(SIG_SETMASK, [INT CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
close(4)                                = 0
open("/dev/fd/63", O_RDONLY)            = 3
fcntl(0, F_GETFD)                       = 0
fcntl(0, F_DUPFD, 10)                   = 10
fcntl(0, F_GETFD)                       = 0
fcntl(10, F_SETFD, FD_CLOEXEC)          = 0
dup2(3, 0)                              = 0
close(3)                                = 0
ioctl(0, TIOCGWINSZ, 0x7fffb0525148)    = -1 ENOTTY (Not a tty)
lseek(0, 0, SEEK_CUR)                   = -1 ESPIPE (Invalid seek)
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "m", 1)                         = 1
read(0, "p", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "e", 1)                         = 1
read(0, "s", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "\n", 1)                        = 1
dup2(10, 0)                             = 0
fcntl(10, F_GETFD)                      = 0x1 (flags FD_CLOEXEC)
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=9007, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 9007
wait4(-1, 0x7fffb0524d10, WNOHANG, NULL) = -1 ECHILD (No child process)
rt_sigreturn({mask=[]})                 = 1
close(10)                               = 0
close(63)                               = 0
writev(1, [{iov_base="/tmp/test/a/a", iov_len=13}, {iov_base="\n", iov_len=1}], 2/tmp/test/a/a
) = 14
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
pipe([3, 4])                            = 0
fcntl(63, F_GETFD)                      = -1 EBADF (Bad file descriptor)
dup2(3, 63)                             = 63
close(3)                                = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, ~[], [INT CHLD], 8) = 0
fork()                                  = 9009
rt_sigprocmask(SIG_SETMASK, [INT CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
close(4)                                = 0
open("/dev/fd/63", O_RDONLY)            = 3
fcntl(0, F_GETFD)                       = 0
fcntl(0, F_DUPFD, 10)                   = 10
fcntl(0, F_GETFD)                       = 0
fcntl(10, F_SETFD, FD_CLOEXEC)          = 0
dup2(3, 0)                              = 0
close(3)                                = 0
ioctl(0, TIOCGWINSZ, 0x7fffb0525148)    = -1 ENOTTY (Not a tty)
lseek(0, 0, SEEK_CUR)                   = -1 ESPIPE (Invalid seek)
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "m", 1)                         = 1
read(0, "p", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "e", 1)                         = 1
read(0, "s", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "\n", 1)                        = 1
dup2(10, 0)                             = 0
fcntl(10, F_GETFD)                      = 0x1 (flags FD_CLOEXEC)
close(10)                               = 0
close(63)                               = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8f9000
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=9009, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 9009
wait4(-1, 0x7fffb0524b10, WNOHANG, NULL) = -1 ECHILD (No child process)
rt_sigreturn({mask=[]})                 = 140635475513344
munmap(0x7fe83f8f9000, 4096)            = 0
writev(1, [{iov_base="/tmp/test/a/a", iov_len=13}, {iov_base="\n", iov_len=1}], 2/tmp/test/a/a
) = 14
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8f9000
munmap(0x7fe83f8f9000, 4096)            = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
pipe([3, 4])                            = 0
fcntl(63, F_GETFD)                      = -1 EBADF (Bad file descriptor)
dup2(3, 63)                             = 63
close(3)                                = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, ~[], [INT CHLD], 8) = 0
fork()                                  = 9011
rt_sigprocmask(SIG_SETMASK, [INT CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
close(4)                                = 0
open("/dev/fd/63", O_RDONLY)            = 3
fcntl(0, F_GETFD)                       = 0
fcntl(0, F_DUPFD, 10)                   = 10
fcntl(0, F_GETFD)                       = 0
fcntl(10, F_SETFD, FD_CLOEXEC)          = 0
dup2(3, 0)                              = 0
close(3)                                = 0
ioctl(0, TIOCGWINSZ, 0x7fffb0525148)    = -1 ENOTTY (Not a tty)
lseek(0, 0, SEEK_CUR)                   = -1 ESPIPE (Invalid seek)
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "m", 1)                         = 1
read(0, "p", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "e", 1)                         = 1
read(0, "s", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "\n", 1)                        = 1
dup2(10, 0)                             = 0
fcntl(10, F_GETFD)                      = 0x1 (flags FD_CLOEXEC)
close(10)                               = 0
close(63)                               = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8f9000
munmap(0x7fe83f8f9000, 4096)            = 0
writev(1, [{iov_base="/tmp/test/a/a", iov_len=13}, {iov_base="\n", iov_len=1}], 2/tmp/test/a/a
) = 14
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=9011, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 9011
wait4(-1, 0x7fffb0524d10, WNOHANG, NULL) = -1 ECHILD (No child process)
rt_sigreturn({mask=[]})                 = 14
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8f9000
munmap(0x7fe83f8f9000, 4096)            = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
pipe([3, 4])                            = 0
fcntl(63, F_GETFD)                      = -1 EBADF (Bad file descriptor)
dup2(3, 63)                             = 63
close(3)                                = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, ~[], [INT CHLD], 8) = 0
fork()                                  = 9013
rt_sigprocmask(SIG_SETMASK, [INT CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
close(4)                                = 0
open("/dev/fd/63", O_RDONLY)            = 3
fcntl(0, F_GETFD)                       = 0
fcntl(0, F_DUPFD, 10)                   = 10
fcntl(0, F_GETFD)                       = 0
fcntl(10, F_SETFD, FD_CLOEXEC)          = 0
dup2(3, 0)                              = 0
close(3)                                = 0
ioctl(0, TIOCGWINSZ, 0x7fffb0525148)    = -1 ENOTTY (Not a tty)
lseek(0, 0, SEEK_CUR)                   = -1 ESPIPE (Invalid seek)
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "m", 1)                         = 1
read(0, "p", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "e", 1)                         = 1
read(0, "s", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "\n", 1)                        = 1
dup2(10, 0)                             = 0
fcntl(10, F_GETFD)                      = 0x1 (flags FD_CLOEXEC)
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=9013, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 9013
wait4(-1, 0x7fffb0524d10, WNOHANG, NULL) = -1 ECHILD (No child process)
rt_sigreturn({mask=[]})                 = 1
close(10)                               = 0
close(63)                               = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8f9000
munmap(0x7fe83f8f9000, 4096)            = 0
writev(1, [{iov_base="/tmp/test/a/a", iov_len=13}, {iov_base="\n", iov_len=1}], 2/tmp/test/a/a
) = 14
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8f9000
munmap(0x7fe83f8f9000, 4096)            = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
pipe([3, 4])                            = 0
fcntl(63, F_GETFD)                      = -1 EBADF (Bad file descriptor)
dup2(3, 63)                             = 63
close(3)                                = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, ~[], [INT CHLD], 8) = 0
fork()                                  = 9015
rt_sigprocmask(SIG_SETMASK, [INT CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
close(4)                                = 0
open("/dev/fd/63", O_RDONLY)            = 3
fcntl(0, F_GETFD)                       = 0
fcntl(0, F_DUPFD, 10)                   = 10
fcntl(0, F_GETFD)                       = 0
fcntl(10, F_SETFD, FD_CLOEXEC)          = 0
dup2(3, 0)                              = 0
close(3)                                = 0
ioctl(0, TIOCGWINSZ, 0x7fffb0525148)    = -1 ENOTTY (Not a tty)
lseek(0, 0, SEEK_CUR)                   = -1 ESPIPE (Invalid seek)
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "m", 1)                         = 1
read(0, "p", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "e", 1)                         = 1
read(0, "s", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "\n", 1)                        = 1
dup2(10, 0)                             = 0
fcntl(10, F_GETFD)                      = 0x1 (flags FD_CLOEXEC)
close(10)                               = 0
close(63)                               = 0
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=9015, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 9015
wait4(-1, 0x7fffb0524dd0, WNOHANG, NULL) = -1 ECHILD (No child process)
rt_sigreturn({mask=[]})                 = 140635475546960
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8f9000
munmap(0x7fe83f8f9000, 4096)            = 0
writev(1, [{iov_base="/tmp/test/a/a", iov_len=13}, {iov_base="\n", iov_len=1}], 2/tmp/test/a/a
) = 14
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8f9000
munmap(0x7fe83f8f9000, 4096)            = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
pipe([3, 4])                            = 0
fcntl(63, F_GETFD)                      = -1 EBADF (Bad file descriptor)
dup2(3, 63)                             = 63
close(3)                                = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, ~[], [INT CHLD], 8) = 0
fork()                                  = 9017
rt_sigprocmask(SIG_SETMASK, [INT CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
close(4)                                = 0
open("/dev/fd/63", O_RDONLY)            = 3
fcntl(0, F_GETFD)                       = 0
fcntl(0, F_DUPFD, 10)                   = 10
fcntl(0, F_GETFD)                       = 0
fcntl(10, F_SETFD, FD_CLOEXEC)          = 0
dup2(3, 0)                              = 0
close(3)                                = 0
ioctl(0, TIOCGWINSZ, 0x7fffb0525148)    = -1 ENOTTY (Not a tty)
lseek(0, 0, SEEK_CUR)                   = -1 ESPIPE (Invalid seek)
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "m", 1)                         = 1
read(0, "p", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "e", 1)                         = 1
read(0, "s", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "/", 1)                         = 1
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=9017, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 9017
wait4(-1, 0x7fffb0524ad0, WNOHANG, NULL) = -1 ECHILD (No child process)
rt_sigreturn({mask=[]})                 = 1
read(0, "a", 1)                         = 1
read(0, "\n", 1)                        = 1
dup2(10, 0)                             = 0
fcntl(10, F_GETFD)                      = 0x1 (flags FD_CLOEXEC)
close(10)                               = 0
close(63)                               = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8f9000
munmap(0x7fe83f8f9000, 4096)            = 0
writev(1, [{iov_base="/tmp/test/a/a", iov_len=13}, {iov_base="\n", iov_len=1}], 2/tmp/test/a/a
) = 14
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8f9000
munmap(0x7fe83f8f9000, 4096)            = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
pipe([3, 4])                            = 0
fcntl(63, F_GETFD)                      = -1 EBADF (Bad file descriptor)
dup2(3, 63)                             = 63
close(3)                                = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, ~[], [INT CHLD], 8) = 0
fork()                                  = 9019
rt_sigprocmask(SIG_SETMASK, [INT CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
close(4)                                = 0
open("/dev/fd/63", O_RDONLY)            = 3
fcntl(0, F_GETFD)                       = 0
fcntl(0, F_DUPFD, 10)                   = 10
fcntl(0, F_GETFD)                       = 0
fcntl(10, F_SETFD, FD_CLOEXEC)          = 0
dup2(3, 0)                              = 0
close(3)                                = 0
ioctl(0, TIOCGWINSZ, 0x7fffb0525148)    = -1 ENOTTY (Not a tty)
lseek(0, 0, SEEK_CUR)                   = -1 ESPIPE (Invalid seek)
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "m", 1)                         = 1
read(0, "p", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "e", 1)                         = 1
read(0, "s", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "\n", 1)                        = 1
dup2(10, 0)                             = 0
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=9019, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 9019
wait4(-1, 0x7fffb0524d50, WNOHANG, NULL) = -1 ECHILD (No child process)
rt_sigreturn({mask=[]})                 = 0
fcntl(10, F_GETFD)                      = 0x1 (flags FD_CLOEXEC)
close(10)                               = 0
close(63)                               = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8f9000
munmap(0x7fe83f8f9000, 4096)            = 0
writev(1, [{iov_base="/tmp/test/a/a", iov_len=13}, {iov_base="\n", iov_len=1}], 2/tmp/test/a/a
) = 14
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8f9000
munmap(0x7fe83f8f9000, 4096)            = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
pipe([3, 4])                            = 0
fcntl(63, F_GETFD)                      = -1 EBADF (Bad file descriptor)
dup2(3, 63)                             = 63
close(3)                                = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, ~[], [INT CHLD], 8) = 0
fork()                                  = 9021
rt_sigprocmask(SIG_SETMASK, [INT CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
close(4)                                = 0
open("/dev/fd/63", O_RDONLY)            = 3
fcntl(0, F_GETFD)                       = 0
fcntl(0, F_DUPFD, 10)                   = 10
fcntl(0, F_GETFD)                       = 0
fcntl(10, F_SETFD, FD_CLOEXEC)          = 0
dup2(3, 0)                              = 0
close(3)                                = 0
ioctl(0, TIOCGWINSZ, 0x7fffb0525148)    = -1 ENOTTY (Not a tty)
lseek(0, 0, SEEK_CUR)                   = -1 ESPIPE (Invalid seek)
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "m", 1)                         = 1
read(0, "p", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "e", 1)                         = 1
read(0, "s", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "\n", 1)                        = 1
dup2(10, 0)                             = 0
fcntl(10, F_GETFD)                      = 0x1 (flags FD_CLOEXEC)
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=9021, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 9021
wait4(-1, 0x7fffb0524d10, WNOHANG, NULL) = -1 ECHILD (No child process)
rt_sigreturn({mask=[]})                 = 1
close(10)                               = 0
close(63)                               = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8f9000
munmap(0x7fe83f8f9000, 4096)            = 0
writev(1, [{iov_base="/tmp/test/a/a", iov_len=13}, {iov_base="\n", iov_len=1}], 2/tmp/test/a/a
) = 14
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8f9000
munmap(0x7fe83f8f9000, 4096)            = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
pipe([3, 4])                            = 0
fcntl(63, F_GETFD)                      = -1 EBADF (Bad file descriptor)
dup2(3, 63)                             = 63
close(3)                                = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, ~[], [INT CHLD], 8) = 0
fork()                                  = 9023
rt_sigprocmask(SIG_SETMASK, [INT CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, {sa_handler=0x56552a2d4190, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe83fa53093}, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
close(4)                                = 0
open("/dev/fd/63", O_RDONLY)            = 3
fcntl(0, F_GETFD)                       = 0
fcntl(0, F_DUPFD, 10)                   = 10
fcntl(0, F_GETFD)                       = 0
fcntl(10, F_SETFD, FD_CLOEXEC)          = 0
dup2(3, 0)                              = 0
close(3)                                = 0
ioctl(0, TIOCGWINSZ, 0x7fffb0525148)    = -1 ENOTTY (Not a tty)
lseek(0, 0, SEEK_CUR)                   = -1 ESPIPE (Invalid seek)
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "m", 1)                         = 1
read(0, "p", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "e", 1)                         = 1
read(0, "s", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "a", 1)                         = 1
read(0, "\n", 1)                        = 1
dup2(10, 0)                             = 0
fcntl(10, F_GETFD)                      = 0x1 (flags FD_CLOEXEC)
close(10)                               = 0
close(63)                               = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8f9000
munmap(0x7fe83f8f9000, 4096)            = 0
writev(1, [{iov_base="/tmp/test/a/a", iov_len=13}, {iov_base="\n", iov_len=1}], 2/tmp/test/a/a
) = 14
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=9023, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 9023
wait4(-1, 0x7fffb0524d10, WNOHANG, NULL) = -1 ECHILD (No child process)
rt_sigreturn({mask=[]})                 = 14
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe83f8f9000
munmap(0x7fe83f8f9000, 4096)            = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
pipe([3, 4])                            = 0