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Diffstat (limited to '')
| -rw-r--r-- | README | 13 |
1 files changed, 8 insertions, 5 deletions
@@ -11,7 +11,7 @@ programs. In particular the option '--recursive' is very efficient in those utilities supporting it. The utilities provided are zcat, zcmp, zdiff, zgrep, ztest, and zupdate. -The formats supported are bzip2, gzip, lzip, and xz. +The formats supported are bzip2, gzip, lzip, xz, and zstd. Zutils uses external compressors. The compressor to be used for each format is configurable at runtime. @@ -21,11 +21,14 @@ gzip's znew. NOTE: Bzip2 and lzip provide well-defined values of exit status, which makes them safe to use with zutils. Gzip and xz may return ambiguous warning -values, making them less reliable back ends for zutils. +values, making them less reliable back ends for zutils. Zstd currently does +not even document its exit status in its man page. FORMAT NOTE 1: The option '--format' allows the processing of a subset -of formats in recursive mode and when trying compressed file names: -'zgrep foo -r --format=bz2,lz somedir somefile.tar'. +of formats in recursive mode and when trying compressed file names. For +example, use the following command to search for the string 'foo' in +gzip and lzip files only: +'zgrep foo -r --format=gz,lz somedir somefile.tar'. FORMAT NOTE 2: If the option '--force-format' is given, the files are passed to the corresponding decompressor without verifying their format, @@ -37,7 +40,7 @@ been compressed. Decompressed is used to refer to data which have undergone the process of decompression. -Copyright (C) 2009-2021 Antonio Diaz Diaz. +Copyright (C) 2009-2022 Antonio Diaz Diaz. This file is free documentation: you have unlimited permission to copy, distribute, and modify it. |