__NR_dup2          67 arch/x86/include/generated/uapi/asm/unistd_32.h #define __NR_dup2 63
__NR_dup2          37 arch/x86/include/generated/uapi/asm/unistd_64.h #define __NR_dup2 33
__NR_dup2          32 arch/x86/include/generated/uapi/asm/unistd_x32.h #define __NR_dup2 (__X32_SYSCALL_BIT + 33)