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#!/usr/bin/env bash |
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|
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### Here string |
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cat <<< 'hi' |
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# stdout-json: "hi\n" |
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# N-I dash stdout-json: "" |
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# N-I dash status: 2 |
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|
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### Here string with $ |
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cat <<< $'one\ntwo\n' |
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# stdout-json: "one\ntwo\n\n" |
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# N-I dash stdout-json: "" |
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# N-I dash status: 2 |
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|
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### Here redirect with explicit descriptor |
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# A space betwen 0 and <<EOF causes it to pass '0' as an arg to cat. |
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cat 0<<EOF |
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one |
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EOF |
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# stdout: one |
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|
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### Here doc from another input file descriptor |
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# NOTE: OSH fails on descriptor 9, but not descriptor 8? Is this because of |
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# the Python VM? How to inspect state? |
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read_from_fd.py 8 8<<EOF |
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here doc on descriptor |
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EOF |
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# stdout: 8: here doc on descriptor |
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|
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### Multiple here docs with different descriptors |
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read_from_fd.py 0 3 <<EOF 3<<EOF3 |
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fd0 |
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EOF |
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fd3 |
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EOF3 |
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# stdout-json: "0: fd0\n3: fd3\n" |
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|
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### Here doc with bad var delimiter |
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cat <<${a} |
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here |
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${a} |
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# stdout: here |
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|
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### Here doc with bad comsub delimiter |
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# bash is OK with this; dash isn't. Should be a parse error. |
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cat <<$(a) |
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here |
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$(a) |
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# stdout-json: "" |
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# status: 2 |
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# BUG bash stdout: here |
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# BUG bash status: 0 |
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# OK mksh status: 1 |
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|
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### Here doc and < redirect -- last one wins |
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echo hello >$TMP/hello.txt # temporary fix |
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cat <<EOF <$TMP/hello.txt |
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here |
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EOF |
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# stdout: hello |
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|
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### < redirect and here doc -- last one wins |
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cat <$TMP/hello.txt <<EOF |
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here |
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EOF |
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# stdout: here |
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|
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### Here doc with var sub, command sub, arith sub |
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var=v |
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cat <<EOF |
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var: ${var} |
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command: $(echo hi) |
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arith: $((1+2)) |
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EOF |
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# stdout-json: "var: v\ncommand: hi\narith: 3\n" |
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|
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### Here doc in middle. And redirects in the middle. |
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# This isn't specified by the POSIX grammar, but it's accepted by both dash and |
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# bash! |
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echo foo > _tmp/foo.txt |
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echo bar > _tmp/bar.txt |
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cat <<EOF 1>&2 _tmp/foo.txt - _tmp/bar.txt |
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here |
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EOF |
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# stderr-json: "foo\nhere\nbar\n" |
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|
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### Here doc line continuation |
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cat <<EOF \ |
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; echo two |
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one |
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EOF |
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# stdout-json: "one\ntwo\n" |
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|
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### Here doc with quote expansion in terminator |
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cat <<'EOF'"2" |
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one |
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two |
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EOF2 |
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# stdout-json: "one\ntwo\n" |
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|
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### Here doc with multiline double quoted string |
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cat <<EOF; echo "two |
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three" |
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one |
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EOF |
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# stdout-json: "one\ntwo\nthree\n" |
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|
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### Two here docs -- first is ignored; second ones wins! |
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<<EOF1 cat <<EOF2 |
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hello |
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EOF1 |
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there |
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EOF2 |
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# stdout: there |
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|
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### Here doc with line continuation, then pipe. Syntax error. |
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cat <<EOF \ |
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1 |
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2 |
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3 |
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EOF |
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| tac |
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# status: 2 |
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# OK mksh status: 1 |
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|
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### Here doc with pipe on first line |
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cat <<EOF | tac |
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1 |
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2 |
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3 |
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EOF |
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# stdout-json: "3\n2\n1\n" |
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|
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### Here doc with pipe continued on last line |
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cat <<EOF | |
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1 |
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2 |
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3 |
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EOF |
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tac |
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# stdout-json: "3\n2\n1\n" |
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|
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### Here doc with builtin 'read' |
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# read can't be run in a subshell. |
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read v1 v2 <<EOF |
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val1 val2 |
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EOF |
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echo =$v1= =$v2= |
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# stdout: =val1= =val2= |
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|
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### Compound command here doc |
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while read line; do |
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echo X $line |
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done <<EOF |
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1 |
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2 |
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3 |
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EOF |
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# stdout-json: "X 1\nX 2\nX 3\n" |
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|
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|
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### Here doc in while condition and here doc in body |
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while cat <<E1 && cat <<E2; do cat <<E3; break; done |
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1 |
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E1 |
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2 |
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E2 |
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3 |
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E3 |
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# stdout-json: "1\n2\n3\n" |
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|
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### Here doc in while condition and here doc in body on multiple lines |
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while cat <<E1 && cat <<E2 |
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1 |
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E1 |
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2 |
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E2 |
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do |
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cat <<E3 |
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3 |
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E3 |
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break |
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done |
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# stdout-json: "1\n2\n3\n" |
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|
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### Here doc in while loop split up more |
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while cat <<E1 |
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1 |
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E1 |
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|
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cat <<E2 |
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2 |
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E2 |
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|
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do |
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cat <<E3 |
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3 |
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E3 |
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break |
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done |
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# stdout-json: "1\n2\n3\n" |
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|
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### Mixing << and <<- |
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cat <<-EOF; echo --; cat <<EOF2 |
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one |
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EOF |
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two |
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EOF2 |
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# stdout-json: "one\n--\ntwo\n" |
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|
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|
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|
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### Two compound commands with two here docs |
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while read line; do echo X $line; done <<EOF; echo ==; while read line; do echo Y $line; done <<EOF2 |
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1 |
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2 |
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EOF |
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3 |
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4 |
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EOF2 |
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# stdout-json: "X 1\nX 2\n==\nY 3\nY 4\n" |
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|
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### Function def and execution with here doc |
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func() { cat; } <<EOF; echo before; func; echo after |
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1 |
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2 |
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EOF |
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# stdout-json: "before\n1\n2\nafter\n" |
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|
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### Here doc as command prefix |
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<<EOF tac |
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1 |
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2 |
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3 |
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EOF |
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# stdout-json: "3\n2\n1\n" |
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|
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# NOTE that you can have redirection AFTER the here doc thing. And you don't |
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# need a space! Those are operators. |
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# |
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# POSIX doesn't seem to have this? They have io_file, which is for |
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# filenames, and io_here, which is here doc. But about 1>&2 syntax? Geez. |
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### Redirect after here doc |
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cat <<EOF 1>&2 |
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out |
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EOF |
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# stderr: out |
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|
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### here doc stripping tabs |
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cat <<-EOF |
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1 |
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2 |
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3 |
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EOF |
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# stdout-json: "1\n2\n 3\n" |
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|
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### Here doc within subshell with boolean |
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[[ $(cat <<EOF |
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foo |
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EOF |
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) == foo ]]; echo $? |
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# stdout: 0 |
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# N-I dash stdout: 127 |
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|
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### Here Doc in if condition |
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if cat <<EOF; then |
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here doc in IF CONDITION |
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EOF |
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echo THEN executed |
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fi |
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# stdout-json: "here doc in IF CONDITION\nTHEN executed\n" |
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|
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### Multiple here docs in pipeline |
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# SKIPPED: hangs with osh on Debian |
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# The second instance reads its stdin from the pipe, and fd 5 from a here doc. |
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read_from_fd.py 3 3<<EOF3 | read_from_fd.py 0 5 5<<EOF5 |
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fd3 |
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EOF3 |
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fd5 |
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EOF5 |
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# stdout-json: "0: 3: fd3\n5: fd5\n" |
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|
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### Multiple here docs in pipeline on multiple lines |
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# SKIPPED: hangs with osh on Debian |
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# The second instance reads its stdin from the pipe, and fd 5 from a here doc. |
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read_from_fd.py 3 3<<EOF3 | |
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fd3 |
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EOF3 |
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read_from_fd.py 0 5 5<<EOF5 |
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fd5 |
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EOF5 |
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# stdout-json: "0: 3: fd3\n5: fd5\n" |