Bug#804944: dtach seems broken on arm64

On Wed, May 04, 2016 at 09:01:35PM +0200, Stefan Völkel wrote: > I can reproduce the problem inside a chroot without /dev/pts mounted. Once I > mount /dev/pts the error is gone. > > I'd say lets go with the patch. Thanks. I've applied the patch and released dtach version 0.9. -- Ned T. Crigler

Bug#804944: dtach seems broken on arm64

On Thu, 17 Dec 2015 16:18:17 -0800 "Ned T. Crigler" wrote: Something like the following could be an improvement to the error message, though I can't think of a portable way to determine if forkpty is looking for /dev/pts and a devpts filesystem, so that a hint

Bug#804944: dtach seems broken on arm64

Something like the following could be an improvement to the error message, though I can't think of a portable way to determine if forkpty is looking for /dev/pts and a devpts filesystem, so that a hint could also be added to the error message. Did mounting devpts on /dev/pts fix the problem? ---

Bug#804944: dtach seems broken on arm64

Hi, please take a look at https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=804944 and keep 804944-forwar...@bugs.debian.org on CC to record your messages in the BTS. Stefan

Bug#804944: dtach seems broken on arm64

Stefan writes: > Can you strace detach to see where it looks for ptys ? Sorry, I missed this message. Here is the output from strace -f execve("/usr/bin/dtach", ["dtach", "-A", "/tmp/foo", "bash"], [/* 21 vars */]) = 0 brk(0) = 0x19793000

Bug#804944: dtach seems broken on arm64

Can you strace detach to see where it looks for ptys ?

Bug#804944: dtach seems broken on arm64

Comparing your strace: [pid 28825] openat(AT_FDCWD, "/dev/ptmx", O_RDWR) = 4 [pid 28825] statfs("/dev/pts", {f_type="TMPFS_MAGIC", f_bsize=4096, f_blocks=2560, f_bfree=2560, f_bavail=2560, f_files=2063331, f_ffree=2063053, f_fsid={0, 0}, f_namelen=255, f_frsize=4096}) = 0 [pid 28825]

Bug#804944: dtach seems broken on arm64

Stefan writes: > > i am guessing the difference hides in forkpty. could you > > cd /tmp > apt-get source dtach > cd dtach-0.8 > ./configure > > and attach config.h? > Here it is. This is run inside the unstable chroot. /* config.h. Generated from

Bug#804944: dtach seems broken on arm64

Package: dtach Version: 0.8-2.1 Severity: important The only arm64 box I have access to is asachi.debian.org, but there dtach seems not to work at all. Here notmuch is an existing schroot session with dtach installed in it. bremner@asachi ~ % schroot -c notmuch -r bremner@asachi ~ % dtach -A