Date: Tue, 16 Feb 2021 17:22:43 -0800 From: Mark Millard <marklmi@yahoo.com> To: freebsd-current <freebsd-current@freebsd.org> Subject: "grep -rI ... /" vs. processing of /dev/ : should "--exclude-dir /dev" be required in order to avoid /dev/? Message-ID: <B822DED7-0607-47F3-8C1F-4C814D2A9EF5@yahoo.com> References: <B822DED7-0607-47F3-8C1F-4C814D2A9EF5.ref@yahoo.com>
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I historically on occasion have done something like: # grep -rI ... / in order to find all instances of a text, including in build trees and such. I now find that I need to do something more like (using a more specific example): # grep -rI --exclude-dir /dev '#define.*__FreeBSD_version' otherwise the grep ends up reading from the tty and waits for it. Top shows, for example, 13470 root 22 0 12848Ki 2692Ki ttyin 11 0:00 0.00% = grep -rI #define.*__FreeBSD_version / Is this expected? Should I have always been using "--exclude-dir /dev"? What lead to the behavior change? (FYI: The activity is normally as root.) I'll note that I also got a couple of other messages first: grep: /dev/log: Operation not supported grep: /dev/reroot/reroot: Operation not supported by device I do not remember getting these in the past. The issue happens with or without the -I part of the grep command. The context for the above is based on main 3acea07c1873 , or, in more detail, # ~/fbsd-based-on-what-freebsd-main.sh merge-base: 3acea07c1873b1e4042f4a4fa8668745ee59f15b merge-base: CommitDate: 2021-02-08 19:15:21 +0000 c1845d00f818 (HEAD -> mm-src) mm-src snapshot for mm's patched build in = git context. 3acea07c1873 (pure-src) Restore the augmented strlen commentary FreeBSD FBSDFHUGE 14.0-CURRENT FreeBSD 14.0-CURRENT = mm-src-n244686-c1845d00f818 GENERIC-NODBG amd64 amd64 1400004 1400004 =3D=3D=3D Mark Millard marklmi at yahoo.com ( dsl-only.net went away in early 2018-Mar)
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