bash Sed 错误“命令 a 需要 \ 后跟文本”

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时间:2020-09-18 14:39:22  来源:igfitidea点击:

Sed error "command a expects \ followed by text"

bashsedopenscad

提问by

Here is my script:

这是我的脚本:

openscad  -D generate=1 -o .csg 2>&1 >/dev/null |
sed 's/ECHO: \"\[LC\] //' |
sed 's/"$//' |
sed '$a;' >./2d_

That output:

那个输出:

sed: 1: "$a;": command a expects \ followed by text

采纳答案by Jonathan Leffler

Your version of sedis not GNU sedwhich allows what you use. You need to write:

您的版本sed不是 GNU sed,它允许您使用什么。你需要写:

openscad  -D generate=1 -o .csg 2>&1 >/dev/null |
sed 's/ECHO: \"\[LC\] //' |
sed 's/"$//' |
sed '$a\
;' >./2d_

Also, three copies of sedis a little excessive (to be polite); one suffices:

另外,三份sed有点过分(礼貌);一个就够了:

openscad  -D generate=1 -o .csg 2>&1 >/dev/null |
sed -e 's/ECHO: \"\[LC\] //' \
    -e 's/"$//' \
    -e '$a\' \
    -e ';' >./2d_

or:

或者:

openscad  -D generate=1 -o .csg 2>&1 >/dev/null |
sed -e 's/ECHO: \"\[LC\] //' -e 's/"$//' -e '$a\' -e ';' >./2d_