rpm-build

History

Arseny Maslennikov 5e1278ff0a CanonPath: reimplement, use an "ignore list" of path components

If e.g. /bin is a symbolic link, it is canonicalized into /usr/bin, so
packages get auto-generated dependencies on paths like /usr/bin/sh and
/usr/sbin/blkid.

Here is an example error message:
  The following packages have unmet dependencies:
    chrooted: Depends: /usr/bin/sh but it is not installable
              PreDepends: /usr/bin/sh but it is not installable
  E: Broken packages
  hsh-install: Failed to calculate package file list.
  hsh-install: Failed to generate package file list.

Try to work around this by replacing the current sorta-canonicalization
written in shell with a small C program which implements an algorithm
akin to realpath. It deviates from `realpath` and `readlink -e` in 3
following ways:
* it allows all path components to be missing, like `readlink -m` and
  like the previous CanonPath impl);
* it ignores the last path component even if it is present, like the
  previous CanonPath impl;
* it reserves the right to not follow some symlinks as each path
  component is traversed: if the component is a symbolic link and is
  present in the ignore-list (we set it to /bin and /sbin for now), the
  link is not followed.

Here are some observations on a merged-usr system:
  bash-5.2# readlink -vm -- /bin/sh
  /usr/bin/sh5
  bash-5.2# /bin/sh -ec '. /usr/lib/rpm/functions; CanonPath /bin/sh'
  /usr/bin/sh
  bash-5.2# /usr/lib/rpm/remappath2 '/bin:/sbin' /bin/sh
  /bin/sh

  bash-5.2# readlink -vm -- /bin/ping
  /usr/libexec/ping/ping
  bash-5.2# /bin/sh -ec '. /usr/lib/rpm/functions; CanonPath /bin/ping'
  /usr/bin/ping
  bash-5.2# /usr/lib/rpm/remappath2 '/bin:/sbin' /bin/ping
  /bin/ping

  bash-5.2# readlink -vm -- /sbin/blkid
  /usr/sbin/blkid
  bash-5.2# /bin/sh -ec '. /usr/lib/rpm/functions; CanonPath /sbin/blkid'
  /usr/sbin/blkid
  bash-5.2# /usr/lib/rpm/remappath2 '/bin:/sbin' /sbin/blkid
  /sbin/blkid

Also, explicitly add -D_FILE_OFFSET_BITS=64 to the remappath2 tool's
cflags.

2024-03-11 17:00:00 +03:00

dump_ld_config.c

tools: build dump_ld_config and filesize with -D_FILE_OFFSET_BITS=64

2019-01-10 23:20:03 +00:00

dump.c

sync with rpm4 branch: include local headers

2002-03-25 22:02:39 +00:00

dumpdb.c

fixed options processing

2005-10-16 16:52:49 +00:00

filesize.c

tools: build dump_ld_config and filesize with -D_FILE_OFFSET_BITS=64