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| author | Mike Frysinger <vapier@gentoo.org> | 2013-02-27 01:01:43 -0500 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2013-02-27 01:01:43 -0500 |
| commit | 39b8fb41c50e6ee0aaca81cde2a4dec98d45ef9a (patch) | |
| tree | 44f4d1a9b44bbaf98e28e94d8c20c784e5882f63 /examples | |
| parent | 40b97fb31ec7c24db706b47182f400f2a13dbbfc (diff) | |
| download | busybox-w32-39b8fb41c50e6ee0aaca81cde2a4dec98d45ef9a.tar.gz busybox-w32-39b8fb41c50e6ee0aaca81cde2a4dec98d45ef9a.tar.bz2 busybox-w32-39b8fb41c50e6ee0aaca81cde2a4dec98d45ef9a.zip | |
udhcpc: support resolv.conf symlinks
Often it is desirable to have /etc/ be on read-only storage (well, the
whole rootfs) but have things like /etc/resolv.conf be symlinks to a
writable location. Tweak the simple script to support that.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'examples')
| -rwxr-xr-x | examples/udhcp/simple.script | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/examples/udhcp/simple.script b/examples/udhcp/simple.script index 40ee73822..d42f2d3d5 100755 --- a/examples/udhcp/simple.script +++ b/examples/udhcp/simple.script | |||
| @@ -34,13 +34,17 @@ case "$1" in | |||
| 34 | fi | 34 | fi |
| 35 | 35 | ||
| 36 | echo "Recreating $RESOLV_CONF" | 36 | echo "Recreating $RESOLV_CONF" |
| 37 | echo -n > $RESOLV_CONF-$$ | 37 | # If the file is a symlink somewhere (like /etc/resolv.conf |
| 38 | [ -n "$domain" ] && echo "search $domain" >> $RESOLV_CONF-$$ | 38 | # pointing to /run/resolv.conf), make sure things work. |
| 39 | realconf=$(realpath "$RESOLV_CONF" 2>/dev/null || echo "$RESOLV_CONF") | ||
| 40 | tmpfile="$realconf-$$" | ||
| 41 | > "$tmpfile" | ||
| 42 | [ -n "$domain" ] && echo "search $domain" >> "$tmpfile" | ||
| 39 | for i in $dns ; do | 43 | for i in $dns ; do |
| 40 | echo " Adding DNS server $i" | 44 | echo " Adding DNS server $i" |
| 41 | echo "nameserver $i" >> $RESOLV_CONF-$$ | 45 | echo "nameserver $i" >> "$tmpfile" |
| 42 | done | 46 | done |
| 43 | mv $RESOLV_CONF-$$ $RESOLV_CONF | 47 | mv "$tmpfile" "$realconf" |
| 44 | ;; | 48 | ;; |
| 45 | esac | 49 | esac |
| 46 | 50 | ||