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doc: cksum: --check: improve supported formats description

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* doc/coreutils.texi (cksum common options): Reorder and tweak the info
to make it clearer that --check does not support the legacy crc output
from the cksum command.
Reported at https://bugs.debian.org/1108363
This commit is contained in:
Pádraig Brady
2025-06-27 15:02:50 +01:00
parent 5a5b4a7810
commit 7c2729cb58
1 changed files with 9 additions and 7 deletions
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doc/coreutils.texi
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@@ -4204,13 +4204,17 @@ for reading standard input when standard input is a terminal.
Read file names and checksum information (not data) from each
@var{file} (or from standard input if no @var{file} was specified) and report
whether the checksums match the contents of the named files.
The input to this mode is usually the output of
a prior, checksum-generating run of the command.
The input to this mode is usually the output of a prior,
checksum-generating run of the command. However the
@command{cksum} command does not support @option{--check}
with the legacy output format from the @samp{sysv}, @samp{bsd},
@samp{crc} or @samp{crc32b} algorithms.
Three input formats are supported. Either the default output
format described above, the @option{--tag} output format,
or the BSD reversed mode format which is similar to the default mode,
Three input formats are supported. Either the "untagged" output format,
the "tagged" output format, or the BSD reversed mode format
which is similar to the "untagged" output format
but doesn't use a character to distinguish binary and text modes.
@xref{cksum output modes} for details of these formats.
For the @command{cksum} command, the @option{--check} option
supports auto-detecting the digest algorithm to use,
@@ -4236,8 +4240,6 @@ If any listed file cannot be opened or read, if any valid line has
a checksum inconsistent with the associated file, or if no valid
line is found, @command{cksum} exits with nonzero status. Otherwise,
it exits successfully.
The @command{cksum} command does not support @option{--check}
with the older @samp{sysv}, @samp{bsd}, @samp{crc} or @samp{crc32b} algorithms.
@item --ignore-missing
@opindex --ignore-missing