Date: 20 Feb 2001 22:43:10 +0100 From: Dag-Erling Smorgrav <des@ofug.org> To: Luigi Rizzo <luigi@info.iet.unipi.it> Cc: Greg Lehey <grog@lemis.com>, Luigi Rizzo <luigi@FreeBSD.org>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/release/picobsd/build Makefile.mfs Message-ID: <xzpwvalf2tt.fsf@flood.ping.uio.no> In-Reply-To: Dag-Erling Smorgrav's message of "20 Feb 2001 14:15:04 %2B0100" References: <200102200128.CAA37354@info.iet.unipi.it> <xzplmr1jy1z.fsf@flood.ping.uio.no>
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Dag-Erling Smorgrav <des@ofug.org> writes: > You could write a short Perl script (or C program) that scans a > directory and generates C code (using only mkdir(2), mknod(2), > symlink(2) and chown(2)) that recreates the device nodes. I suspect > the resulting code, when crunched, would consume less space than the > device nodes themselves. <URL:http://people.freebsd.org/~des/software/makedev.pl>; Populate a directory with the desired device nodes, then generate the C source code as follows: $ ./makedev.pl -o makedev.c /path/to/populated/dev Starting from an empty directory, the resulting binary weighs in at 5432 bytes; 34360 bytes when starting from /dev on my laptop (1092 nodes including directories). You can further reduce the size of the binary if you realize that device nodes are invariably owned by system users and groups, which have UIDs and GIDs low enough to fit in a char. If you don't care about ownership, you can drop the UID and GID (and the associated code). In that case you can probably drop the mode as well. Note that the current implementation doesn't support symlinks, but this shouldn't be hard to add if necessary. I don't know if this actually saves you anything; it'll probably reduce the size of a compressed fs image, but I don't know by how much. DES -- Dag-Erling Smorgrav - des@ofug.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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