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Bug#1082647: copy_exec: [regression] ignores trailing slash, installs file as directory name

Cross-posted to 2 groups.

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Package: initramfs-tools-core
Version: 0.142+deb12u1
Severity: serious
Justification: hidden breakage for users, ought to be fixed in stable-pu
X-Debbugs-Cc: tg@mirbsd.de

In bullseye, this would work:

copy_exec /usr/lib/klibc/bin/rnd_shuf /usr/libexec/
copy_exec /usr/sbin/rdate /usr/libexec/

In bookworm, the first line instead of copying the
file rnd_shuf to /usr/libexec/rnd_shuf it copies it
to /usr/libexec and the second does no better.

Incidentally…

copy_exec /usr/lib/klibc/bin/rnd_shuf /usr/libexec/
copy_exec /usr/sbin/rdate /usr/libexec/rdate

… makes the second line fail:

mkdir: cannot create directory ‘/var/tmp/mkinitramfs_eQ7nC7//usr/libexec’: File exists

So copy_exec clearly still i̲s̲ capable of creating missing
intermediate directories, but something made it stop
honouring trailing slashes.

I wonder what else, other than my script to enable the
network interface, get the clocktime, and disable it
again, on an RPi that has no RTC, will break on users’
systems from this. This really needs to be fixed in
stable-pu.


-- System Information:
Debian Release: 12.7
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'proposed-updates'), (500, 'stable')
Architecture: armel (armv6l)

Kernel: Linux 6.1.0-25-rpi (UP)
Locale: LANG=C, LC_CTYPE=C (charmap=UTF-8) (ignored: LC_ALL set to C.UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/lksh
Init: sysvinit (via /sbin/init)

Versions of packages initramfs-tools-core depends on:
ii  coreutils    9.1-1
ii  cpio         2.13+dfsg-7.1
ii  e2fsprogs    1.47.0-2
ii  klibc-utils  2.0.12-1
ii  kmod         30+20221128-1
ii  logsave      1.47.0-2
ii  udev         252.30-1~deb12u2

Versions of packages initramfs-tools-core recommends:
ii  busybox  1:1.35.0-4+b3
ii  zstd     1.5.4+dfsg2-5

Versions of packages initramfs-tools-core suggests:
pn  bash-completion  <none>

-- Configuration Files:
/etc/initramfs-tools/initramfs.conf changed:
MODULES=dep
BUSYBOX=auto
KEYMAP=n
COMPRESS=zstd
DEVICE=
NFSROOT=auto
RUNSIZE=10%
FSTYPE=auto


-- no debconf information

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Bug#1082647: copy_exec: [regression] ignores trailing slash, installs file as directory name Thorsten Glaser <tg@mirbsd.de> - 2024-09-24 03:00 +0200
  Bug#1082647: copy_exec: [regression] ignores trailing slash, installs file as directory name Thorsten Glaser <tg@mirbsd.de> - 2024-09-24 17:30 +0200

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