749 lines
20 KiB
Plaintext
749 lines
20 KiB
Plaintext
if [ ! "$_SYSRC_SUBR" ]; then _SYSRC_SUBR=1
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#
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# Copyright (c) 2006-2015 Devin Teske
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# $FreeBSD$
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#
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############################################################ INCLUDES
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BSDCFG_SHARE="/usr/share/bsdconfig"
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[ "$_COMMON_SUBR" ] || . $BSDCFG_SHARE/common.subr || exit 1
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BSDCFG_LIBE="/usr/libexec/bsdconfig"
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if [ ! "$_SYSRC_JAILED" ]; then
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f_dprintf "%s: loading includes..." sysrc.subr
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f_include_lang $BSDCFG_LIBE/include/messages.subr
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fi
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############################################################ CONFIGURATION
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#
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# Standard pathnames (inherit values from shell if available)
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#
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: ${RC_DEFAULTS:="/etc/defaults/rc.conf"}
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############################################################ GLOBALS
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#
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# Global exit status variables
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#
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SUCCESS=0
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FAILURE=1
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#
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# Valid characters that can appear in an sh(1) variable name
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#
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# Please note that the character ranges A-Z and a-z should be avoided because
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# these can include accent characters (which are not valid in a variable name).
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# For example, A-Z matches any character that sorts after A but before Z,
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# including A and Z. Although ASCII order would make more sense, that is not
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# how it works.
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#
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VALID_VARNAME_CHARS="0-9ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz_"
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############################################################ FUNCTIONS
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# f_clean_env [ --except $varname ... ]
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#
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# Unset all environment variables in the current scope. An optional list of
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# arguments can be passed, indicating which variables to avoid unsetting; the
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# `--except' is required to enable the exclusion-list as the remainder of
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# positional arguments.
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#
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# Be careful not to call this in a shell that you still expect to perform
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# $PATH expansion in, because this will blow $PATH away. This is best used
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# within a sub-shell block "(...)" or "$(...)" or "`...`".
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#
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f_clean_env()
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{
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local var arg except=
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#
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# Should we process an exclusion-list?
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#
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if [ "$1" = "--except" ]; then
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except=1
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shift 1
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fi
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#
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# Loop over a list of variable names from set(1) built-in.
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#
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for var in $( set | awk -F= \
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'/^[[:alpha:]_][[:alnum:]_]*=/ {print $1}' \
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| grep -v '^except$'
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); do
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#
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# In POSIX bourne-shell, attempting to unset(1) OPTIND results
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# in "unset: Illegal number:" and causes abrupt termination.
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#
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[ "$var" = OPTIND ] && continue
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#
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# Process the exclusion-list?
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#
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if [ "$except" ]; then
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for arg in "$@" ""; do
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[ "$var" = "$arg" ] && break
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done
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[ "$arg" ] && continue
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fi
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unset "$var"
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done
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}
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# f_sysrc_get $varname
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#
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# Get a system configuration setting from the collection of system-
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# configuration files (in order: /etc/defaults/rc.conf /etc/rc.conf and
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# /etc/rc.conf.local)
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#
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# NOTE: Additional shell parameter-expansion formats are supported. For
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# example, passing an argument of "hostname%%.*" (properly quoted) will
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# return the hostname up to (but not including) the first `.' (see sh(1),
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# "Parameter Expansion" for more information on additional formats).
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#
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f_sysrc_get()
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{
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# Sanity check
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[ -f "$RC_DEFAULTS" -a -r "$RC_DEFAULTS" ] || return $FAILURE
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# Taint-check variable name
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case "$1" in
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[0-9]*)
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# Don't expand possible positional parameters
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return $FAILURE ;;
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*)
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[ "$1" ] || return $FAILURE
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esac
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( # Execute within sub-shell to protect parent environment
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#
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# Clear the environment of all variables, preventing the
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# expansion of normals such as `PS1', `TERM', etc.
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#
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f_clean_env --except IFS RC_CONFS RC_DEFAULTS
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. "$RC_DEFAULTS" > /dev/null 2>&1
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unset RC_DEFAULTS
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# no longer needed
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#
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# If the query is for `rc_conf_files' then store the value that
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# we inherited from sourcing RC_DEFAULTS (above) so that we may
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# conditionally restore this value after source_rc_confs in the
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# event that RC_CONFS does not customize the value.
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#
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if [ "$1" = "rc_conf_files" ]; then
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_rc_conf_files="$rc_conf_files"
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fi
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#
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# If RC_CONFS is defined, set $rc_conf_files to an explicit
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# value, modifying the default behavior of source_rc_confs().
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#
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if [ "${RC_CONFS+set}" ]; then
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rc_conf_files="$RC_CONFS"
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_rc_confs_set=1
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fi
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source_rc_confs > /dev/null 2>&1
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#
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# If the query was for `rc_conf_files' AND after calling
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# source_rc_confs the value has not changed, then we should
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# restore the value to the one inherited from RC_DEFAULTS
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# before performing the final query (preventing us from
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# returning what was set via RC_CONFS when the intent was
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# instead to query the value from the file(s) specified).
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#
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if [ "$1" = "rc_conf_files" -a \
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"$_rc_confs_set" -a \
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"$rc_conf_files" = "$RC_CONFS" \
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]; then
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rc_conf_files="$_rc_conf_files"
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unset _rc_conf_files
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unset _rc_confs_set
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fi
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unset RC_CONFS
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# no longer needed
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#
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# This must be the last functional line for both the sub-shell
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# and the function to preserve the return status from formats
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# such as "${varname?}" and "${varname:?}" (see "Parameter
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# Expansion" in sh(1) for more information).
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#
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eval echo '"${'"$1"'}"' 2> /dev/null
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)
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}
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# f_sysrc_service_configs [-a|-p] $name [$var_to_set]
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#
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# Get a list of optional `rc.conf.d' entries sourced by system `rc.d' script
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# $name (see rc.subr(8) for additional information on `rc.conf.d'). If $name
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# exists in `/etc/rc.d' or $local_startup directories and is an rc(8) script
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# the result is a space separated list of `rc.conf.d' entries sourced by the
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# $name `rc.d' script. Otherwise, if $name exists as a binary `rc.d' script,
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# the result is ``/etc/rc.conf.d/$name /usr/local/etc/rc.conf.d/$name''. The
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# result is NULL if $name does not exist.
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#
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# If $var_to_set is missing or NULL, output is to standard out. Returns success
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# if $name was found, failure otherwise.
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#
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# If `-a' flag is given and $var_to_set is non-NULL, append result to value of
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# $var_to_set rather than overwriting current contents.
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#
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# If `-p' flag is given and $var_to_set is non-NULL, prepend result to value of
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# $var_to_set rather than overwriting current contents.
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#
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# NB: The `-a' and `-p' option flags are mutually exclusive.
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#
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f_sysrc_service_configs()
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{
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local OPTIND=1 OPTARG __flag __append= __prepend=
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local __local_startup __dir __spath __stype __names=
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while getopts ap __flag; do
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case "$__flag" in
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a) __append=1 __prepend= ;;
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p) __prepend=1 __append= ;;
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esac
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done
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shift $(( $OPTIND - 1 ))
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[ $# -gt 0 ] || return $FAILURE
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local __sname="$1" __var_to_set="$2"
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__local_startup=$( f_sysrc_get local_startup )
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for __dir in /etc/rc.d $__local_startup; do
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__spath="$__dir/$__sname"
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[ -f "$__spath" -a -x "$__spath" ] || __spath= continue
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break
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done
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[ "$__spath" ] || return $FAILURE
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__stype=$( file -b "$__spath" 2> /dev/null )
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case "$__stype" in
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*"shell script"*)
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__names=$( exec 9<&1 1>&- 2>&-
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last_name=
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print_name() {
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local name="$1"
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case "$name" in
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""|.|..|*/*|"$last_name") return ;;
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esac
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echo "$name" >&9
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last_name="$name"
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}
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eval "$( awk '{
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gsub(/load_rc_config /, "print_name ")
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gsub(/run_rc_command /, ": ")
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print
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}' "$__spath" )"
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) ;;
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*)
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__names="$__sname"
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esac
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local __name __test_path __configs=
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for __name in $__names; do
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for __dir in /etc/rc.d $__local_startup; do
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__test_path="${__dir%/rc.d}/rc.conf.d/$__name"
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[ -d "$__test_path" ] ||
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__configs="$__configs $__test_path" continue
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for __test_path in "$__test_path"/*; do
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[ -f "$__test_path" ] || continue
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__configs="$__configs $__test_path"
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done
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done
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done
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__configs="${__configs# }"
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if [ "$__var_to_set" ]; then
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local __cur=
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[ "$__append" -o "$__prepend" ] &&
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f_getvar "$__var_to_set" __cur
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[ "$__append" ] && __configs="$__cur{$__cur:+ }$__configs"
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[ "$__prepend" ] && __configs="$__configs${__cur:+ }$__cur"
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setvar "$__var_to_set" "$__configs"
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else
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echo "$__configs"
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fi
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return $SUCCESS
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}
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# f_sysrc_get_default $varname
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#
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# Get a system configuration default setting from the default rc.conf(5) file
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# (or whatever RC_DEFAULTS points at).
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#
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f_sysrc_get_default()
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{
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# Sanity check
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[ -f "$RC_DEFAULTS" -a -r "$RC_DEFAULTS" ] || return $FAILURE
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# Taint-check variable name
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case "$1" in
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[0-9]*)
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# Don't expand possible positional parameters
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return $FAILURE ;;
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*)
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[ "$1" ] || return $FAILURE
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esac
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( # Execute within sub-shell to protect parent environment
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#
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# Clear the environment of all variables, preventing the
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# expansion of normals such as `PS1', `TERM', etc.
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#
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f_clean_env --except RC_DEFAULTS
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. "$RC_DEFAULTS" > /dev/null 2>&1
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unset RC_DEFAULTS
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# no longer needed
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#
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# This must be the last functional line for both the sub-shell
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# and the function to preserve the return status from formats
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# such as "${varname?}" and "${varname:?}" (see "Parameter
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# Expansion" in sh(1) for more information).
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#
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eval echo '"${'"$1"'}"' 2> /dev/null
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)
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}
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# f_sysrc_find $varname
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#
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# Find which file holds the effective last-assignment to a given variable
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# within the rc.conf(5) file(s).
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#
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# If the variable is found in any of the rc.conf(5) files, the function prints
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# the filename it was found in and then returns success. Otherwise output is
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# NULL and the function returns with error status.
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#
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f_sysrc_find()
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{
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local varname="${1%%[!$VALID_VARNAME_CHARS]*}"
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local regex="^[[:space:]]*$varname="
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local rc_conf_files="$( f_sysrc_get rc_conf_files )"
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local conf_files=
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local file
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# Check parameters
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case "$varname" in
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""|[0-9]*) return $FAILURE
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esac
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#
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# If RC_CONFS is defined, set $rc_conf_files to an explicit
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# value, modifying the default behavior of source_rc_confs().
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#
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[ "${RC_CONFS+set}" ] && rc_conf_files="$RC_CONFS"
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#
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# Reverse the order of files in rc_conf_files (the boot process sources
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# these in order, so we will search them in reverse-order to find the
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# last-assignment -- the one that ultimately effects the environment).
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#
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for file in $rc_conf_files; do
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conf_files="$file${conf_files:+ }$conf_files"
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done
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#
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# Append the defaults file (since directives in the defaults file
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# indeed affect the boot process, we'll want to know when a directive
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# is found there).
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#
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conf_files="$conf_files${conf_files:+ }$RC_DEFAULTS"
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#
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# Find which file matches assignment to the given variable name.
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#
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for file in $conf_files; do
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[ -f "$file" -a -r "$file" ] || continue
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if grep -Eq "$regex" $file; then
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echo $file
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return $SUCCESS
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fi
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done
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return $FAILURE # Not found
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}
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# f_sysrc_desc $varname
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#
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# Attempts to return the comments associated with varname from the rc.conf(5)
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# defaults file `/etc/defaults/rc.conf' (or whatever RC_DEFAULTS points to).
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#
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# Multi-line comments are joined together. Results are NULL if no description
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# could be found.
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#
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# This function is a two-parter. Below is the awk(1) portion of the function,
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# afterward is the sh(1) function which utilizes the below awk script.
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#
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f_sysrc_desc_awk='
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# Variables that should be defined on the invocation line:
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# -v varname="varname"
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#
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BEGIN {
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regex = "^[[:space:]]*"varname"="
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found = 0
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buffer = ""
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}
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{
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if ( ! found )
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{
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if ( ! match($0, regex) ) next
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found = 1
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sub(/^[^#]*(#[[:space:]]*)?/, "")
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buffer = $0
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next
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}
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if ( !/^[[:space:]]*#/ ||
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/^[[:space:]]*[[:alpha:]_][[:alnum:]_]*=/ ||
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/^[[:space:]]*#[[:alpha:]_][[:alnum:]_]*=/ ||
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/^[[:space:]]*$/ ) exit
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sub(/(.*#)*[[:space:]]*/, "")
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buffer = buffer" "$0
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}
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END {
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# Clean up the buffer
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sub(/^[[:space:]]*/, "", buffer)
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sub(/[[:space:]]*$/, "", buffer)
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print buffer
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exit ! found
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}
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'
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f_sysrc_desc()
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{
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awk -v varname="$1" "$f_sysrc_desc_awk" < "$RC_DEFAULTS"
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}
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# f_sysrc_set $varname $new_value
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#
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# Change a setting in the system configuration files (edits the files in-place
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# to change the value in the last assignment to the variable). If the variable
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# does not appear in the source file, it is appended to the end of the primary
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# system configuration file `/etc/rc.conf'.
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#
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# This function is a two-parter. Below is the awk(1) portion of the function,
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# afterward is the sh(1) function which utilizes the below awk script.
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#
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f_sysrc_set_awk='
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# Variables that should be defined on the invocation line:
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# -v varname="varname"
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# -v new_value="new_value"
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#
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|
BEGIN {
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regex = "^[[:space:]]*"varname"="
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found = retval = 0
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}
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|
{
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|
# If already found... just spew
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|
if ( found ) { print; next }
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# Does this line match an assignment to our variable?
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|
if ( ! match($0, regex) ) { print; next }
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|
# Save important match information
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found = 1
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matchlen = RSTART + RLENGTH - 1
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# Store the value text for later munging
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value = substr($0, matchlen + 1, length($0) - matchlen)
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# Store the first character of the value
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t1 = t2 = substr(value, 0, 1)
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# Assignment w/ back-ticks, expression, or misc.
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|
# We ignore these since we did not generate them
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|
#
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|
if ( t1 ~ /[`$\\]/ ) { retval = 1; print; next }
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# Assignment w/ single-quoted value
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|
else if ( t1 == "'\''" ) {
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sub(/^'\''[^'\'']*/, "", value)
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if ( length(value) == 0 ) t2 = ""
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sub(/^'\''/, "", value)
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}
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# Assignment w/ double-quoted value
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|
else if ( t1 == "\"" ) {
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|
sub(/^"(.*\\\\+")*[^"]*/, "", value)
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|
if ( length(value) == 0 ) t2 = ""
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|
sub(/^"/, "", value)
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|
}
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# Assignment w/ non-quoted value
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|
else if ( t1 ~ /[^[:space:];]/ ) {
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t1 = t2 = "\""
|
|
sub(/^[^[:space:]]*/, "", value)
|
|
}
|
|
|
|
# Null-assignment
|
|
else if ( t1 ~ /[[:space:];]/ ) { t1 = t2 = "\"" }
|
|
|
|
printf "%s%c%s%c%s\n", substr($0, 0, matchlen), \
|
|
t1, new_value, t2, value
|
|
}
|
|
END { exit retval }
|
|
'
|
|
f_sysrc_set()
|
|
{
|
|
local funcname=f_sysrc_set
|
|
local varname="$1" new_value="$2"
|
|
|
|
# Check arguments
|
|
[ "$varname" ] || return $FAILURE
|
|
|
|
#
|
|
# Find which rc.conf(5) file contains the last-assignment
|
|
#
|
|
local not_found=
|
|
local file="$( f_sysrc_find "$varname" )"
|
|
if [ "$file" = "$RC_DEFAULTS" -o ! "$file" ]; then
|
|
#
|
|
# We either got a null response (not found) or the variable
|
|
# was only found in the rc.conf(5) defaults. In either case,
|
|
# let's instead modify the first file from $rc_conf_files.
|
|
#
|
|
|
|
not_found=1
|
|
|
|
#
|
|
# If RC_CONFS is defined, use $RC_CONFS
|
|
# rather than $rc_conf_files.
|
|
#
|
|
if [ "${RC_CONFS+set}" ]; then
|
|
file="${RC_CONFS%%[$IFS]*}"
|
|
else
|
|
file=$( f_sysrc_get 'rc_conf_files%%[$IFS]*' )
|
|
fi
|
|
fi
|
|
|
|
#
|
|
# If not found, append new value to last file and return.
|
|
#
|
|
if [ "$not_found" ]; then
|
|
echo "$varname=\"$new_value\"" >> "$file"
|
|
return $?
|
|
fi
|
|
|
|
#
|
|
# Perform sanity checks.
|
|
#
|
|
if [ ! -w "$file" ]; then
|
|
f_err "$msg_cannot_create_permission_denied\n" \
|
|
"$pgm" "$file"
|
|
return $FAILURE
|
|
fi
|
|
|
|
#
|
|
# Create a new temporary file to write to.
|
|
#
|
|
local tmpfile
|
|
if ! f_eval_catch -dk tmpfile $funcname mktemp 'mktemp -t "%s"' "$pgm"
|
|
then
|
|
echo "$tmpfile" >&2
|
|
return $FAILURE
|
|
fi
|
|
|
|
#
|
|
# Fixup permissions (else we're in for a surprise, as mktemp(1) creates
|
|
# the temporary file with 0600 permissions, and if we simply mv(1) the
|
|
# temporary file over the destination, the destination will inherit the
|
|
# permissions from the temporary file).
|
|
#
|
|
local mode
|
|
f_eval_catch -dk mode $funcname stat 'stat -f "%%#Lp" "%s"' "$file" ||
|
|
mode=0644
|
|
f_eval_catch -d $funcname chmod 'chmod "%s" "%s"' "$mode" "$tmpfile"
|
|
|
|
#
|
|
# Fixup ownership. The destination file _is_ writable (we tested
|
|
# earlier above). However, this will fail if we don't have sufficient
|
|
# permissions (so we throw stderr into the bit-bucket).
|
|
#
|
|
local owner
|
|
f_eval_catch -dk owner $funcname stat \
|
|
'stat -f "%%u:%%g" "%s"' "$file" || owner="root:wheel"
|
|
f_eval_catch -d $funcname chown 'chown "%s" "%s"' "$owner" "$tmpfile"
|
|
|
|
#
|
|
# Operate on the matching file, replacing only the last occurrence.
|
|
#
|
|
local new_contents retval
|
|
new_contents=$( tail -r $file 2> /dev/null )
|
|
new_contents=$( echo "$new_contents" | awk -v varname="$varname" \
|
|
-v new_value="$new_value" "$f_sysrc_set_awk" )
|
|
retval=$?
|
|
|
|
#
|
|
# Write the temporary file contents.
|
|
#
|
|
echo "$new_contents" | tail -r > "$tmpfile" || return $FAILURE
|
|
if [ $retval -ne $SUCCESS ]; then
|
|
echo "$varname=\"$new_value\"" >> "$tmpfile"
|
|
fi
|
|
|
|
#
|
|
# Taint-check our results.
|
|
#
|
|
if ! f_eval_catch -d $funcname sh '/bin/sh -n "%s"' "$tmpfile"; then
|
|
f_err "$msg_previous_syntax_errors\n" "$pgm" "$file"
|
|
rm -f "$tmpfile"
|
|
return $FAILURE
|
|
fi
|
|
|
|
#
|
|
# Finally, move the temporary file into place.
|
|
#
|
|
f_eval_catch -de $funcname mv 'mv "%s" "%s"' "$tmpfile" "$file"
|
|
}
|
|
|
|
# f_sysrc_delete $varname
|
|
#
|
|
# Remove a setting from the system configuration files (edits files in-place).
|
|
# Deletes all assignments to the given variable in all config files. If the
|
|
# `-f file' option is passed, the removal is restricted to only those files
|
|
# specified, otherwise the system collection of rc_conf_files is used.
|
|
#
|
|
# This function is a two-parter. Below is the awk(1) portion of the function,
|
|
# afterward is the sh(1) function which utilizes the below awk script.
|
|
#
|
|
f_sysrc_delete_awk='
|
|
# Variables that should be defined on the invocation line:
|
|
# -v varname="varname"
|
|
#
|
|
BEGIN {
|
|
regex = "^[[:space:]]*"varname"="
|
|
found = 0
|
|
}
|
|
{
|
|
if ( $0 ~ regex )
|
|
found = 1
|
|
else
|
|
print
|
|
}
|
|
END { exit ! found }
|
|
'
|
|
f_sysrc_delete()
|
|
{
|
|
local funcname=f_sysrc_delete
|
|
local varname="$1"
|
|
local file
|
|
|
|
# Check arguments
|
|
[ "$varname" ] || return $FAILURE
|
|
|
|
#
|
|
# Operate on each of the specified files
|
|
#
|
|
local tmpfile
|
|
for file in ${RC_CONFS-$( f_sysrc_get rc_conf_files )}; do
|
|
[ -e "$file" ] || continue
|
|
|
|
#
|
|
# Create a new temporary file to write to.
|
|
#
|
|
if ! f_eval_catch -dk tmpfile $funcname mktemp \
|
|
'mktemp -t "%s"' "$pgm"
|
|
then
|
|
echo "$tmpfile" >&2
|
|
return $FAILURE
|
|
fi
|
|
|
|
#
|
|
# Fixup permissions and ownership (mktemp(1) defaults to 0600
|
|
# permissions) to instead match the destination file.
|
|
#
|
|
local mode owner
|
|
f_eval_catch -dk mode $funcname stat \
|
|
'stat -f "%%#Lp" "%s"' "$file" || mode=0644
|
|
f_eval_catch -dk owner $funcname stat \
|
|
'stat -f "%%u:%%g" "%s"' "$file" || owner="root:wheel"
|
|
f_eval_catch -d $funcname chmod \
|
|
'chmod "%s" "%s"' "$mode" "$tmpfile"
|
|
f_eval_catch -d $funcname chown \
|
|
'chown "%s" "%s"' "$owner" "$tmpfile"
|
|
|
|
#
|
|
# Operate on the file, removing all occurrences, saving the
|
|
# output in our temporary file.
|
|
#
|
|
awk -v varname="$varname" "$f_sysrc_delete_awk" "$file" \
|
|
> "$tmpfile"
|
|
if [ $? -ne $SUCCESS ]; then
|
|
# The file didn't contain any assignments
|
|
rm -f "$tmpfile"
|
|
continue
|
|
fi
|
|
|
|
#
|
|
# Taint-check our results.
|
|
#
|
|
if ! f_eval_catch -d $funcname sh '/bin/sh -n "%s"' "$tmpfile"
|
|
then
|
|
f_err "$msg_previous_syntax_errors\n" \
|
|
"$pgm" "$file"
|
|
rm -f "$tmpfile"
|
|
return $FAILURE
|
|
fi
|
|
|
|
#
|
|
# Perform sanity checks
|
|
#
|
|
if [ ! -w "$file" ]; then
|
|
f_err "$msg_permission_denied\n" "$pgm" "$file"
|
|
rm -f "$tmpfile"
|
|
return $FAILURE
|
|
fi
|
|
|
|
#
|
|
# Finally, move the temporary file into place.
|
|
#
|
|
f_eval_catch -de $funcname mv \
|
|
'mv "%s" "%s"' "$tmpfile" "$file" || return $FAILURE
|
|
done
|
|
}
|
|
|
|
############################################################ MAIN
|
|
|
|
f_dprintf "%s: Successfully loaded." sysrc.subr
|
|
|
|
fi # ! $_SYSRC_SUBR
|