Fix rev 1.12.
/tmp may not be writeable yet when dhclient is first run via /etc/rc.d/netif so using it may not work. Also, writing to a predictable file in /tmp as root is a really bad idea since a malicious user may be able to win a race and insert a symlink which will allow them to cause any file to be overwritten. To solve these problems, create the tempory file in /var/run which will exist this early and is writable only by root. Security: Local risk if users can cause dhclient to run on demand (such as by unplugging and replugging the network cable).
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=154869
@ -135,7 +135,7 @@ add_new_resolv_conf() {
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# thus broke the script. This code creates the resolv.conf if either
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# thus broke the script. This code creates the resolv.conf if either
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# are provided.
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# are provided.
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local tmpres=${TMPDIR:-/tmp}/resolv.conf.std
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local tmpres=/var/run/resolv.conf.${interface}
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rm -f $tmpres
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rm -f $tmpres
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if [ -n "$new_domain_name" ]; then
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if [ -n "$new_domain_name" ]; then
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