#2646: scripts should use printf instead of echo
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Reporter: tito_puentes | Owner: lfs-b...@…
Type: defect | Status: new
Priority: low | Milestone: 6.7
Component: Bootscripts | Version: SVN
Severity: minor | Keywords: echo printf POSIX
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Comment(by tito_puentes):
Replying to [comment:1 bdu...@…]:
> I don't think this is necessary. We never use echo with flags. We do
used ECHO which is defined as /bin/echo which is defined in the functions.
I don't think you've looked at the patch, nor at the lfs script
themselves.
You use echo -ne, and not sparingly.
>
> The 'expensive' part is pretty much a non-starter. On a slow machine,
how expensive is it (in microseconds)?
Test it yourself?
time for i in $(seq 1 1000); do echo str >/dev/null; done
real 0m0.119s
user 0m0.123s
sys 0m0.000s
time for i in $(seq 1 1000); do /bin/echo str >/dev/null; done
real 0m2.403s
user 0m0.000s
sys 0m0.540s
>
> I don't know of any distros that don't use echo, but I only checked RH
and Ubuntu.
>
> Recommend closing as works for me, but I'll leave it open for other
comments.
1. Even if it didn't add portability bonuses, it makes the functions less
complicated and removes a potential dep on a binary.
2. Ubuntu either uses the binary or doesn't use flags, because they use
dash by default.
3. Archlinux uses printf instead of echo.
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Ticket URL: <http://wiki.linuxfromscratch.org/lfs/ticket/2646#comment:2>
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