Date: Mon, 8 Jan 2018 14:29:59 +0700 From: Victor Sudakov <vas@mpeks.tomsk.su> To: Polytropon <freebsd@edvax.de> Cc: FreeBSD Mailing List <freebsd-questions@freebsd.org>, Ultima <ultima1252@gmail.com> Subject: Re: Convert .flac and .ape to mp3 Message-ID: <20180108072958.GA52639@admin.sibptus.transneft.ru> In-Reply-To: <20180106170352.ce49b320.freebsd@edvax.de> References: <20180104163421.GA15692@admin.sibptus.transneft.ru> <20180104175156.440fa0c2.freebsd@edvax.de> <20180106063934.GA32231@admin.sibptus.transneft.ru> <CANJ8om7LJqAG%2BX0dn1JDZn1WYJtxZtX9SAK2yQU74om7-SSQRQ@mail.gmail.com> <20180106085528.GA33117@admin.sibptus.transneft.ru> <CANJ8om7zUoLM9HCB_5rzC9uWRaPRhCNKcS4-WsXyjZOGGKwDig@mail.gmail.com> <CANJ8om4W7JTxSYxrLjxkDjDVE8b6CxBcOwPV%2BPMQ-oQJYuNW9g@mail.gmail.com> <20180106150753.GA35605@admin.sibptus.transneft.ru> <20180106170352.ce49b320.freebsd@edvax.de>
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Polytropon wrote: > On Sat, 6 Jan 2018 22:07:53 +0700, Victor Sudakov wrote: > > Ultima wrote: > > > Actually, that wont work either. I decided to go look at some of my scripts > > > where I had to do something similar, the solution was setting IFS. > > > > > > IFS=$'\n' > > > > What's the dollar sign here for? Why not IFS='\n'? > > It can be seen as "evaluation symbol" (as known from $FOO > being "FOO evaluated"), or "value of" ($FOO = the value > of FOO). > > Another way (convenient, but doesn't look good" is to do > something like this: > > IFS=" > " > > This is a newline as well. In the case above, you want to > set IFS to an _actual_ newline, not to \n. Remember _when_ > the shell evaluates something: Variables like $IFS will > be evaluated when being accessed, not when they are being > declared (even with an initial value). The $'\n' makes > sure that IFS will be assigned an actual (non-escaped) > newline, so when constructs like for() or while read > access $IFS, they find a "real" newline there. The world is full of wonders. Indeed, from sh, echo $'\n' produces a real newline, while echo '\n' produces just a literal "\n". Thank you. -- Victor Sudakov, VAS4-RIPE, VAS47-RIPN AS43859
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