strace -t WhatIDo

13:04:18 munmap(0x7feba2d9c000, 315636) = 0
13:04:18 dup(2)                         = 3
13:04:18 fcntl(3, F_GETFL)              = 0x8002 (flags O_RDWR|O_LARGEFILE)
13:04:18 brk(0)                         = 0x91c000
13:04:18 brk(0x93d000)                  = 0x93d000
13:04:18 fstat(3, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0
13:04:18 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7feba2de9000
13:04:18 lseek(3, 0, SEEK_CUR)          = -1 ESPIPE (Illegal seek)
13:04:18 write(3, "Only a single argument is suppor"..., 36Only a single argument is supported
) = 36
13:04:18 write(3, ": Success\n", 10: Success
)    = 10
13:04:18 close(3)                       = 0
13:04:18 munmap(0x7feba2de9000, 4096)   = 0
13:04:18 exit_group(0)                  = ?
13:04:18 +++ exited with 0 +++


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1.