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ssh_filter_btrbk.sh: support zstd --long[=#] --adapt #617

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ssh_filter_btrbk.sh: support zstd --long[=#] --adapt #617

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5915866
ssh_filter_btrbk.sh: support zstd `--long[=#] --adapt`
HaleTom Apr 21, 2025
e68430c
Use grep -q rather than producing output to /dev/null
HaleTom Apr 22, 2025
03c1d7f
Allow 2 digits as argument to compressor's `-c`
HaleTom Apr 25, 2025
de22086
Revert grep -q option change in ssh_filter_btrbk.sh
HaleTom Oct 4, 2025
6e0917b
Complete reversion of grep -q in ssh_filter_btrbk.sh
HaleTom Oct 4, 2025
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8 changes: 4 additions & 4 deletions ssh_filter_btrbk.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -78,8 +78,8 @@ reject_filtered_cmd()
path_match="(${path_match}|${path_match_legacy})"

if [ -n "${allow_compress}" ]; then
decompress_match="(${compress_list}) -d -c( -[pT][0-9]+)?"
compress_match="(${compress_list}) -c( -[0-9])?( -[pT][0-9]+)?"
decompress_match="(${compress_list}) -d -c( -[pT][0-9]+)?( --long(=[0-9]+)?)?( --adapt)?"
compress_match="(${compress_list}) -c( -[0-9]{1,2})?( -[pT][0-9]+)?( --long(=[0-9]+)?)?( --adapt)?"
else
decompress_match=
compress_match=
Expand All @@ -102,12 +102,12 @@ reject_filtered_cmd()
# when an error occurred.

allow_stream_match="^${stream_in_match}${allow_cmd_match}${stream_out_match}"
if printf '%s' "${SSH_ORIGINAL_COMMAND}" | grep -E "${allow_stream_match}" >/dev/null 2>/dev/null; then
if printf '%s' "${SSH_ORIGINAL_COMMAND}" | grep -E -- "${allow_stream_match}" >/dev/null 2>/dev/null; then
return 0
fi

exact_cmd_match="^(${allow_exact_list})$";
if printf '%s' "${SSH_ORIGINAL_COMMAND}" | grep -E "${exact_cmd_match}" >/dev/null 2>/dev/null; then
if printf '%s' "${SSH_ORIGINAL_COMMAND}" | grep -E -- "${exact_cmd_match}" >/dev/null 2>/dev/null; then
return 0
fi

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