sudo fastboot reboot-bootloader

$ strace -f sudo ./fastboot reboot-bootloader
execve("/usr/bin/sudo", ["sudo", "./fastboot", "reboot-bootloader"], [/* 63 vars */]) = 0
brk(0)                                  = 0x21a3000
fcntl(0, F_GETFD)                       = 0
fcntl(1, F_GETFD)                       = 0
fcntl(2, F_GETFD)                       = 0
access("/etc/suid-debug", F_OK)         = -1 ENOENT (No such file or directory)
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f568fdb8000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=168882, ...}) = 0
mmap(NULL, 168882, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f568fd8e000
close(3)                                = 0
open("/lib/libutil.so.1", O_RDONLY)     = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20\16\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=10632, ...}) = 0
mmap(NULL, 2105608, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f568f999000
mprotect(0x7f568f99b000, 2093056, PROT_NONE) = 0
mmap(0x7f568fb9a000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1000) = 0x7f568fb9a000
close(3)                                = 0
open("/lib/libdl.so.2", O_RDONLY)       = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340\r\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=14688, ...}) = 0
mmap(NULL, 2109688, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f568f795000
mprotect(0x7f568f797000, 2097152, PROT_NONE) = 0
mmap(0x7f568f997000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7f568f997000
close(3)                                = 0
open("/lib/libc.so.6", O_RDONLY)        = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200\20\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1420688, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f568fd8d000
mmap(NULL, 3529416, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f568f437000
mprotect(0x7f568f58b000, 2097152, PROT_NONE) = 0
mmap(0x7f568f78b000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x154000) = 0x7f568f78b000
mmap(0x7f568f790000, 19144, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f568f790000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f568fd8c000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f568fd8b000
arch_prctl(ARCH_SET_FS, 0x7f568fd8c700) = 0
mprotect(0x7f568f78b000, 16384, PROT_READ) = 0
mprotect(0x7f568f997000, 4096, PROT_READ) = 0
mprotect(0x7f568fb9a000, 4096, PROT_READ) = 0
mprotect(0x7f568fdb9000, 4096, PROT_READ) = 0
munmap(0x7f568fd8e000, 168882)          = 0
brk(0)                                  = 0x21a3000
brk(0x21c4000)                          = 0x21c4000
open("/usr/lib/locale/locale-archive", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=1779408, ...}) = 0
mmap(NULL, 1779408, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f568fbd8000
close(3)                                = 0
geteuid()                               = 200
write(2, "sudo", 4sudo)                     = 4
write(2, ": ", 2: )                       = 2
write(2, "must be setuid root", 19must be setuid root)     = 19
write(2, "\n", 1
)                       = 1
access("/var/run/utmpx", F_OK)          = -1 ENOENT (No such file or directory)
open("/var/run/utmp", O_RDONLY|O_CLOEXEC) = 3
lseek(3, 0, SEEK_SET)                   = 0
alarm(0)                                = 0
rt_sigaction(SIGALRM, {0x7f568f53bad0, [], SA_RESTORER, 0x7f568f46b780}, {SIG_DFL, [], 0}, 8) = 0
alarm(10)                               = 0
fcntl(3, F_SETLKW, {type=F_RDLCK, whence=SEEK_SET, start=0, len=0}) = 0
read(3, "\10\0\0\0\346\1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 384) = 384
read(3, "\2\0\0\0\0\0\0\0~\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 384) = 384
read(3, "\1\0\0\0005N\0\0~\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 384) = 384
read(3, "\10\0\0\0w\4\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 384) = 384
read(3, "\6\0\0\0>\5\0\0tty4\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 384) = 384
read(3, "\6\0\0\0?\5\0\0tty5\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 384) = 384
read(3, "\6\0\0\0@\5\0\0tty6\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 384) = 384
read(3, "\5\0\0\0A\5\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 384) = 384
read(3, "\6\0\0\0\210\6\0\0tty1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 384) = 384
read(3, "\6\0\0\0<\5\0\0tty2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 384) = 384
read(3, "\6\0\0\0=\5\0\0tty3\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 384) = 384
read(3, "\7\0\0\0\251\6\0\0tty7\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 384) = 384
read(3, "\7\0\0\0\205\6\0\0pts/0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 384) = 384
read(3, "", 384)                        = 0
fcntl(3, F_SETLKW, {type=F_UNLCK, whence=SEEK_SET, start=0, len=0}) = 0
alarm(0)                                = 10
rt_sigaction(SIGALRM, {SIG_DFL, [], SA_RESTORER, 0x7f568f46b780}, NULL, 8) = 0
exit_group(1)                           = ?