Date: Wed, 26 Nov 2003 10:16:09 -0500 From: Mike Tancsa <mike@sentex.net> To: freebsd-security@freebsd.org Subject: perms of /dev/uhid0 Message-ID: <6.0.1.1.0.20031126101602.06e8e9f0@209.112.4.2>
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I wrote a small app that monitors a Back-UPS ES500 UPS via the uhid0
interface. I want to run the daemon with as little privs as possible.
gastest# ls -l /dev/uhid0
crw-rw---- 1 root operator 122, 0 Nov 12 05:26 /dev/uhid0
gastest#
Is it safe to chmod o+r /dev/uhid0 ? Or is there a better way to drop
privs of the daemon yet still be able to read from the device ?
All I am doing is
char *devname = "/dev/uhid0";
fd = open( devname, O_RDONLY );
if( fd < 0 ) {
perror( "open" );
return -1;
}
do {
count = read( fd, buff, sizeof( buff ) );
.... rest of the program
--------------------------------------------------------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike@sentex.net
Providing Internet since 1994 www.sentex.net
Cambridge, Ontario Canada www.sentex.net/mike
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