Mailinglist Archive: opensuse-factory (1578 mails)

[Anders Johansson <ajh@xxxxxxxx>]

On Saturday 12 November 2011 21:05:10 Carlos E. R. wrote:
> On Saturday, 2011-11-12 at 19:50 +0100, Rüdiger Meier wrote:
> > strace -f init 3
>
> Looks like greek to me.

The condensed version of your strace reveals the relevant parts

[...]
> socket(PF_FILE, SOCK_STREAM|SOCK_CLOEXEC, 0) = 3
> connect(3, {sa_family=AF_FILE, path="/run/systemd/private"}, 22) = 0

connecting to systemd

> sendto(3, "AUTH EXTERNAL 30\r\n", 18, MSG_NOSIGNAL, NULL, 0) = 18
> read(3, "OK 581621e96ee78e1ab08a929b00000"..., 2048) = 37
> sendto(3, "NEGOTIATE_UNIX_FD\r\n", 19, MSG_NOSIGNAL, NULL, 0) = 19
> read(3, "AGREE_UNIX_FD\r\n", 2048)      = 15
> sendto(3, "BEGIN\r\n", 7, MSG_NOSIGNAL, NULL, 0) = 7

The hand shake

> gettid()                                = 19366
> mmap(NULL, 548864, PROT_READ|PROT_WRITE, MAP_PRIVATE|
MAP_ANONYMOUS, -1, 0) =
> 0x7ffbcd8cd000 sendmsg(3, {msg_name(0)=NULL,
> msg_iov(2)=[{"l\1\0\1$\0\0\0\1\0\0\0\240\0\0\0\1\1o\0\31\0\0\0/org/fre"...,
> 176}, {"\20\0\0\0runlevel3.target\0\0\0\0\7\0\0\0isol"..., 36}],
> msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 212 poll([{fd=3,
> events=POLLIN}], 1, 25000) = 1 ([{fd=3, revents=POLLIN}])

Telling systemd to go to runlevel 3

> recvmsg(3,
> {msg_name(0)=NULL,
> msg_iov(1)=[{"l\2\1\1'\0\0\0\1\0\0\0\17\0\0\0\5\1u\0\1\0\0\0\10\1g\0\1o\0\0
> "..., 2048}], msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC},
> MSG_CMSG_CLOEXEC) = 71 recvmsg(3, 0x7fffb23c6e90, 
MSG_CMSG_CLOEXEC) = -1

This presumably contains the result, but unfortunately only the first few 
bytes are included in this strace (use -s with some suitably large value to 
capture the entirety of such strings)

I'd say the tool does what it's supposed to, and if it doesn't work, systemd 
will have to reveal why. Maybe there is a permission problem? Maybe some other 
error? Doesn't it log anything?

Anders
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