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| author | Lasse Collin <lasse.collin@tukaani.org> | 2021-01-11 23:41:16 +0200 |
|---|---|---|
| committer | Lasse Collin <lasse.collin@tukaani.org> | 2022-07-24 13:29:42 +0300 |
| commit | 63e3cdef805a4d9ea94c76c36cbabe4dc76abe36 (patch) | |
| tree | d77c9a416fb7a7e2d88fc54b7edb06b21f871b3c | |
| parent | xzgrep man page: Document exit statuses. (diff) | |
| download | xz-63e3cdef805a4d9ea94c76c36cbabe4dc76abe36.tar.xz | |
xz: Make --keep accept symlinks, hardlinks, and setuid/setgid/sticky.
Previously this required using --force but that has other
effects too which might be undesirable. Changing the behavior
of --keep has a small risk of breaking existing scripts but
since this is a fairly special corner case I expect the
likehood of breakage to be low enough.
I think the new behavior is more logical. The only reason for
the old behavior was to be consistent with gzip and bzip2.
Thanks to Vincent Lefevre and Sebastian Andrzej Siewior.
| -rw-r--r-- | src/xz/file_io.c | 9 | ||||
| -rw-r--r-- | src/xz/xz.1 | 16 |
2 files changed, 20 insertions, 5 deletions
diff --git a/src/xz/file_io.c b/src/xz/file_io.c index 3aadb225..01abc1ba 100644 --- a/src/xz/file_io.c +++ b/src/xz/file_io.c @@ -543,8 +543,9 @@ io_open_src_real(file_pair *pair) } // Symlinks are not followed unless writing to stdout or --force - // was used. - const bool follow_symlinks = opt_stdout || opt_force; + // or --keep was used. + const bool follow_symlinks + = opt_stdout || opt_force || opt_keep_original; // We accept only regular files if we are writing the output // to disk too. bzip2 allows overriding this with --force but @@ -681,7 +682,7 @@ io_open_src_real(file_pair *pair) } #ifndef TUKLIB_DOSLIKE - if (reg_files_only && !opt_force) { + if (reg_files_only && !opt_force && !opt_keep_original) { if (pair->src_st.st_mode & (S_ISUID | S_ISGID)) { // gzip rejects setuid and setgid files even // when --force was used. bzip2 doesn't check @@ -690,7 +691,7 @@ io_open_src_real(file_pair *pair) // and setgid bits there. // // We accept setuid and setgid files if - // --force was used. We drop these bits + // --force or --keep was used. We drop these bits // explicitly in io_copy_attr(). message_warning(_("%s: File has setuid or " "setgid bit set, skipping"), diff --git a/src/xz/xz.1 b/src/xz/xz.1 index 11473ed7..c5ac032e 100644 --- a/src/xz/xz.1 +++ b/src/xz/xz.1 @@ -5,7 +5,7 @@ .\" This file has been put into the public domain. .\" You can do whatever you want with this file. .\" -.TH XZ 1 "2022-07-12" "Tukaani" "XZ Utils" +.TH XZ 1 "2022-07-24" "Tukaani" "XZ Utils" . .SH NAME xz, unxz, xzcat, lzma, unlzma, lzcat \- Compress or decompress .xz and .lzma files @@ -392,6 +392,20 @@ should be used. .TP .BR \-k ", " \-\-keep Don't delete the input files. +.IP "" +Since +.B xz +5.2.6, +this option also makes +.B xz +compress or decompress even if the input is +a symbolic link to a regular file, +has more than one hard link, +or has the setuid, setgid, or sticky bit set. +The setuid, setgid, and sticky bits are not copied +to the target file. +In earlier versions this was only done with +.BR \-\-force . .TP .BR \-f ", " \-\-force This option has several effects: |