On Thu, Jun 16, 2016 at 10:47:42PM +0200, Irrwahn wrote:
> For the record: Should I ever find myself sitting at a
> machine running a Perl interpreter for PID1, I'd either
> immediately kill myself or drink the SystemD Kool-Aid
> by the gallon. (The net effect not being that different.)
On Thu, Jun 16, 2016 at 02:14:48PM -1000, Joel Roth wrote:
> I did a test with Memory::Usage, that reports the
> interpreter's virtual memory size as 22MB. Seems cheap
> to me.
Yeah, we need to use an efficient language!
.globl _start
.data
nopid1: .ascii "No pid 1, no fun.\n"
command: .ascii "/sbin/osloader.sh"
norc: .ascii "Starting /sbin/osloader.sh failed!\n"
.text
_start:
mov $39, %rax # getpid
syscall
cmp $1, %rax
je pid1
mov $1, %rax # write
mov $1, %rdi
mov $nopid1, %rsi
mov $18, %rdx
syscall
mov $60, %rax # _exit
mov $1, %rdi
syscall
pid1:
mov $57, %rax # fork
syscall
cmp $0, %rax
jne child
parent:
mov $61, %rax # wait4
mov $-1, %rdi
xor %rsi, %rsi
xor %rdx, %rdx
syscall
jmp parent
child:
mov $59, %rax # execve
mov $command, %rdi
xor %rsi, %rsi
xor %rdx, %rdx
syscall
mov $1, %rax # write
mov $1, %rdi
mov $norc, %rsi
mov $36, %rdx
syscall
mov $60, %rax # _exit
mov $1, %rdi
syscall
Hmmm... I think I'd go with Perl after all.
Meow!
--
An imaginary friend squared is a real enemy.
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