I've been trying to read a file in bash, and keep all the lines in a single variable, printing it at once after the loop:<\/p>\n
However the output was only: EVIL_BASH, <\/strong>instead of having the lines of the \/tmp\/myfile<\/em> appended.<\/p>\n WHAT THE HELL?<\/strong><\/span><\/p>\n Because of the PIPE, the whole 'while' loop runs in another subshell<\/strong>. This means that $all<\/strong> outside the loop\u00c2\u00a0 is not the same $all from within the loop!<\/strong><\/p>\n Sounds simply like scoping (as in perl), but a really awkward one. Beware.<\/p>\n","protected":false},"excerpt":{"rendered":" I’ve been trying to read a file in bash, and keep all the lines in a single variable, printing it at once after the loop: all=”EVIL_BASH” cat \/tmp\/myfile | while read line; do all=”$all $line” done echo $all However the output was only: EVIL_BASH, instead of having the lines of the \/tmp\/myfile appended. WHAT THE […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[75],"tags":[22,198,203,103],"_links":{"self":[{"href":"http:\/\/www.held.org.il\/blog\/wp-json\/wp\/v2\/posts\/57"}],"collection":[{"href":"http:\/\/www.held.org.il\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.held.org.il\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.held.org.il\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.held.org.il\/blog\/wp-json\/wp\/v2\/comments?post=57"}],"version-history":[{"count":0,"href":"http:\/\/www.held.org.il\/blog\/wp-json\/wp\/v2\/posts\/57\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.held.org.il\/blog\/wp-json\/wp\/v2\/media?parent=57"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.held.org.il\/blog\/wp-json\/wp\/v2\/categories?post=57"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.held.org.il\/blog\/wp-json\/wp\/v2\/tags?post=57"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nall=\"EVIL_BASH<\/strong>\"
\ncat \/tmp\/myfile | while read line; do
\nall=\"$all $line\"
\ndone
\necho $all
\n<\/code><\/p>\n