[ec2-user@ip-172-31-19-78 tmp]$ ls /nfs_dir/
test.txt
[ec2-user@ip-172-31-19-78 tmp]$ strace cp -f test.txt /nfs_dir/test.txt
execve("/usr/bin/cp", ["cp", "-f", "test.txt", "/nfs_dir/test.txt"], 0x7ffe823aba68 /* 23 vars */) = 0
brk(NULL)                               = 0xc9d000
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=28038, ...}) = 0
mmap(NULL, 28038, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fbe9d1f3000
close(3)                                = 0
openat(AT_FDCWD, "/lib64/libselinux.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\20j\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=155680, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbe9d1f1000
mmap(NULL, 2255216, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fbe9cdb0000
mprotect(0x7fbe9cdd4000, 2093056, PROT_NONE) = 0
mmap(0x7fbe9cfd3000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x23000) = 0x7fbe9cfd3000
mmap(0x7fbe9cfd5000, 6512, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fbe9cfd5000
close(3)                                = 0
openat(AT_FDCWD, "/lib64/libacl.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\240\36\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=37000, ...}) = 0
mmap(NULL, 2130560, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fbe9cba7000
mprotect(0x7fbe9cbae000, 2097152, PROT_NONE) = 0
mmap(0x7fbe9cdae000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x7000) = 0x7fbe9cdae000
close(3)                                = 0
openat(AT_FDCWD, "/lib64/libattr.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@\23\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=19816, ...}) = 0
mmap(NULL, 2113896, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fbe9c9a2000
mprotect(0x7fbe9c9a6000, 2093056, PROT_NONE) = 0
mmap(0x7fbe9cba5000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7fbe9cba5000
close(3)                                = 0
openat(AT_FDCWD, "/lib64/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@\21\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=2021312, ...}) = 0
mmap(NULL, 3844768, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fbe9c5f7000
mprotect(0x7fbe9c798000, 2097152, PROT_NONE) = 0
mmap(0x7fbe9c998000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1a1000) = 0x7fbe9c998000
mmap(0x7fbe9c99e000, 15008, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fbe9c99e000
close(3)                                = 0
openat(AT_FDCWD, "/lib64/libpcre.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\0p\25\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=410400, ...}) = 0
mmap(NULL, 2503144, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fbe9c393000
mprotect(0x7fbe9c3f6000, 2093056, PROT_NONE) = 0
mmap(0x7fbe9c5f5000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x62000) = 0x7fbe9c5f5000
close(3)                                = 0
openat(AT_FDCWD, "/lib64/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\340\16\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=19208, ...}) = 0
mmap(NULL, 2109744, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fbe9c18f000
mprotect(0x7fbe9c192000, 2093056, PROT_NONE) = 0
mmap(0x7fbe9c391000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7fbe9c391000
close(3)                                = 0
openat(AT_FDCWD, "/lib64/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\0pa\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=149272, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbe9d1ef000
mmap(NULL, 2217064, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fbe9bf71000
mprotect(0x7fbe9bf89000, 2097152, PROT_NONE) = 0
mmap(0x7fbe9c189000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x18000) = 0x7fbe9c189000
mmap(0x7fbe9c18b000, 13416, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fbe9c18b000
close(3)                                = 0
mmap(NULL, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbe9d1ec000
arch_prctl(ARCH_SET_FS, 0x7fbe9d1ec800) = 0
mprotect(0x7fbe9c998000, 16384, PROT_READ) = 0
mprotect(0x7fbe9c189000, 4096, PROT_READ) = 0
mprotect(0x7fbe9c391000, 4096, PROT_READ) = 0
mprotect(0x7fbe9c5f5000, 4096, PROT_READ) = 0
mprotect(0x7fbe9cba5000, 4096, PROT_READ) = 0
mprotect(0x7fbe9cdae000, 4096, PROT_READ) = 0
mprotect(0x7fbe9cfd3000, 4096, PROT_READ) = 0
mprotect(0x621000, 4096, PROT_READ)     = 0
mprotect(0x7fbe9d1fa000, 4096, PROT_READ) = 0
munmap(0x7fbe9d1f3000, 28038)           = 0
set_tid_address(0x7fbe9d1ecad0)         = 16430
set_robust_list(0x7fbe9d1ecae0, 24)     = 0
rt_sigaction(SIGRTMIN, {sa_handler=0x7fbe9bf76c30, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7fbe9bf827e0}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {sa_handler=0x7fbe9bf76cb0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fbe9bf827e0}, 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
statfs("/sys/fs/selinux", 0x7fff0ceb4250) = -1 ENOENT (No such file or directory)
statfs("/selinux", 0x7fff0ceb4250)      = -1 ENOENT (No such file or directory)
brk(NULL)                               = 0xc9d000
brk(0xcbe000)                           = 0xcbe000
openat(AT_FDCWD, "/proc/filesystems", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
read(3, "nodev\tsysfs\nnodev\trootfs\nnodev\tr"..., 1024) = 328
read(3, "", 1024)                       = 0
close(3)                                = 0
access("/etc/selinux/config", F_OK)     = 0
open("/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=113049440, ...}) = 0
mmap(NULL, 113049440, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fbe953a1000
close(3)                                = 0
geteuid()                               = 1000
stat("/nfs_dir/test.txt", {st_mode=S_IFREG|0664, st_size=3, ...}) = 0
stat("test.txt", {st_mode=S_IFREG|0664, st_size=3, ...}) = 0
stat("/nfs_dir/test.txt", {st_mode=S_IFREG|0664, st_size=3, ...}) = 0
openat(AT_FDCWD, "test.txt", O_RDONLY)  = 3
fstat(3, {st_mode=S_IFREG|0664, st_size=3, ...}) = 0
openat(AT_FDCWD, "/nfs_dir/test.txt", O_WRONLY|O_TRUNC) = 4
fstat(4, {st_mode=S_IFREG|0664, st_size=0, ...}) = 0
fadvise64(3, 0, 0, POSIX_FADV_SEQUENTIAL) = 0
mmap(NULL, 1056768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbe9d0ea000
read(3, "OK\n", 1048576)                = 3
write(4, "OK\n", 3)                     = 3
read(3, "", 1048576)                    = 0
close(4)                                = 0
close(3)                                = 0
munmap(0x7fbe9d0ea000, 1056768)         = 0
lseek(0, 0, SEEK_CUR)                   = -1 ESPIPE (Illegal seek)
close(0)                                = 0
close(1)                                = 0
close(2)                                = 0
exit_group(0)                           = ?
+++ exited with 0 +++
[ec2-user@ip-172-31-19-78 tmp]$ echo $?
0
[ec2-user@ip-172-31-19-78 tmp]$


[ec2-user@ip-172-31-19-78 tmp]$ cp -f test.txt /nfs_dir/test.txt
[ec2-user@ip-172-31-19-78 tmp]$ strace cp -f test.txt /nfs_dir/test.txt
execve("/usr/bin/cp", ["cp", "-f", "test.txt", "/nfs_dir/test.txt"], 0x7ffd79f227c8 /* 23 vars */) = 0
brk(NULL)                               = 0x1949000
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=28038, ...}) = 0
mmap(NULL, 28038, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fc9e95a2000
close(3)                                = 0
openat(AT_FDCWD, "/lib64/libselinux.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\20j\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=155680, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc9e95a0000
mmap(NULL, 2255216, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc9e915f000
mprotect(0x7fc9e9183000, 2093056, PROT_NONE) = 0
mmap(0x7fc9e9382000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x23000) = 0x7fc9e9382000
mmap(0x7fc9e9384000, 6512, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fc9e9384000
close(3)                                = 0
openat(AT_FDCWD, "/lib64/libacl.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\240\36\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=37000, ...}) = 0
mmap(NULL, 2130560, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc9e8f56000
mprotect(0x7fc9e8f5d000, 2097152, PROT_NONE) = 0
mmap(0x7fc9e915d000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x7000) = 0x7fc9e915d000
close(3)                                = 0
openat(AT_FDCWD, "/lib64/libattr.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@\23\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=19816, ...}) = 0
mmap(NULL, 2113896, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc9e8d51000
mprotect(0x7fc9e8d55000, 2093056, PROT_NONE) = 0
mmap(0x7fc9e8f54000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7fc9e8f54000
close(3)                                = 0
openat(AT_FDCWD, "/lib64/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@\21\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=2021312, ...}) = 0
mmap(NULL, 3844768, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc9e89a6000
mprotect(0x7fc9e8b47000, 2097152, PROT_NONE) = 0
mmap(0x7fc9e8d47000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1a1000) = 0x7fc9e8d47000
mmap(0x7fc9e8d4d000, 15008, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fc9e8d4d000
close(3)                                = 0
openat(AT_FDCWD, "/lib64/libpcre.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\0p\25\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=410400, ...}) = 0
mmap(NULL, 2503144, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc9e8742000
mprotect(0x7fc9e87a5000, 2093056, PROT_NONE) = 0
mmap(0x7fc9e89a4000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x62000) = 0x7fc9e89a4000
close(3)                                = 0
openat(AT_FDCWD, "/lib64/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\340\16\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=19208, ...}) = 0
mmap(NULL, 2109744, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc9e853e000
mprotect(0x7fc9e8541000, 2093056, PROT_NONE) = 0
mmap(0x7fc9e8740000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7fc9e8740000
close(3)                                = 0
openat(AT_FDCWD, "/lib64/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\0pa\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=149272, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc9e959e000
mmap(NULL, 2217064, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc9e8320000
mprotect(0x7fc9e8338000, 2097152, PROT_NONE) = 0
mmap(0x7fc9e8538000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x18000) = 0x7fc9e8538000
mmap(0x7fc9e853a000, 13416, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fc9e853a000
close(3)                                = 0
mmap(NULL, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc9e959b000
arch_prctl(ARCH_SET_FS, 0x7fc9e959b800) = 0
mprotect(0x7fc9e8d47000, 16384, PROT_READ) = 0
mprotect(0x7fc9e8538000, 4096, PROT_READ) = 0
mprotect(0x7fc9e8740000, 4096, PROT_READ) = 0
mprotect(0x7fc9e89a4000, 4096, PROT_READ) = 0
mprotect(0x7fc9e8f54000, 4096, PROT_READ) = 0
mprotect(0x7fc9e915d000, 4096, PROT_READ) = 0
mprotect(0x7fc9e9382000, 4096, PROT_READ) = 0
mprotect(0x621000, 4096, PROT_READ)     = 0
mprotect(0x7fc9e95a9000, 4096, PROT_READ) = 0
munmap(0x7fc9e95a2000, 28038)           = 0
set_tid_address(0x7fc9e959bad0)         = 16422
set_robust_list(0x7fc9e959bae0, 24)     = 0
rt_sigaction(SIGRTMIN, {sa_handler=0x7fc9e8325c30, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7fc9e83317e0}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {sa_handler=0x7fc9e8325cb0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fc9e83317e0}, 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
statfs("/sys/fs/selinux", 0x7fffb91e2250) = -1 ENOENT (No such file or directory)
statfs("/selinux", 0x7fffb91e2250)      = -1 ENOENT (No such file or directory)
brk(NULL)                               = 0x1949000
brk(0x196a000)                          = 0x196a000
openat(AT_FDCWD, "/proc/filesystems", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
read(3, "nodev\tsysfs\nnodev\trootfs\nnodev\tr"..., 1024) = 328
read(3, "", 1024)                       = 0
close(3)                                = 0
access("/etc/selinux/config", F_OK)     = 0
open("/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=113049440, ...}) = 0
mmap(NULL, 113049440, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fc9e1750000
close(3)                                = 0
geteuid()                               = 1000
stat("/nfs_dir/test.txt", {st_mode=S_IFREG|0664, st_size=3, ...}) = 0
stat("test.txt", {st_mode=S_IFREG|0664, st_size=3, ...}) = 0
stat("/nfs_dir/test.txt", {st_mode=S_IFREG|0664, st_size=3, ...}) = 0
openat(AT_FDCWD, "test.txt", O_RDONLY)  = 3
fstat(3, {st_mode=S_IFREG|0664, st_size=3, ...}) = 0
openat(AT_FDCWD, "/nfs_dir/test.txt", O_WRONLY|O_TRUNC) = 4
fstat(4, {st_mode=S_IFREG|0664, st_size=0, ...}) = 0
fadvise64(3, 0, 0, POSIX_FADV_SEQUENTIAL) = 0
mmap(NULL, 1056768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc9e9499000
read(3, "OK\n", 1048576)                = 3
write(4, "OK\n", 3)                     = 3
read(3, "", 1048576)                    = 0
close(4)                                = 0
close(3)                                = 0
munmap(0x7fc9e9499000, 1056768)         = 0
lseek(0, 0, SEEK_CUR)                   = -1 ESPIPE (Illegal seek)
close(0)                                = 0
close(1)                                = 0
close(2)                                = 0
exit_group(0)                           = ?
+++ exited with 0 +++
[ec2-user@ip-172-31-19-78 tmp]$