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cat without cat
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| # minimal example just for reference, not pointful by itself | |
| # binary-safe read/write file without cp/cat/dd etc, pure bash, no subshell | |
| while LANG=C IFS= read -d '' -r -n 1 x ;do printf '%c' "$x" ;done <bin1 >bin2 | |
| # slightly useful example, count bytes to get filesize without stat/ls/wc etc | |
| n=0 ;while LANG=C IFS= read -d '' -r -n 1 ;do ((n++)) ;done <bin # filesize = $n bytes |
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from a comment on another gist, slightly different version that reads non-nulls contiguously instead of every single byte individually
https://gist.github.com/bkw777/ddde771cc85fdd888c7ec74953193d66?permalink_comment_id=5686772#gistcomment-5686772