On Mon, Dec 31, 2012 at 12:16 AM, <qi.c...@windriver.com> wrote:
> From: Chen Qi <qi.c...@windriver.com>
>
> To support a read-only rootfs, we use symbolic links which point
> to volatile storage to create the illusion that some directories
> are writable.
>
> Improve populate-volatile.sh script to support read-only rootfs.
Good.
> Add two default config files specific to read-only-rootfs image.
I'd prefer it to be in another package.
> [YOCTO #3406]
>
> Signed-off-by: Chen Qi <qi.c...@windriver.com>
> ---
> .../initscripts/initscripts-1.0/bootmisc.sh | 9 +-
> .../initscripts-1.0/populate-volatile.sh | 281
> ++++++++++----------
> .../initscripts/initscripts-1.0/volatiles | 1 +
> .../initscripts-1.0/volatiles-readonly-minimal | 8 +
> .../initscripts-1.0/volatiles-readonly-sato | 14 +
> meta/recipes-core/initscripts/initscripts_1.0.bb | 11 +-
> 6 files changed, 171 insertions(+), 153 deletions(-)
> create mode 100644
> meta/recipes-core/initscripts/initscripts-1.0/volatiles-readonly-minimal
> create mode 100644
> meta/recipes-core/initscripts/initscripts-1.0/volatiles-readonly-sato
>
> diff --git a/meta/recipes-core/initscripts/initscripts-1.0/bootmisc.sh
> b/meta/recipes-core/initscripts/initscripts-1.0/bootmisc.sh
> index 4f76cb4..3b5a47f 100755
> --- a/meta/recipes-core/initscripts/initscripts-1.0/bootmisc.sh
> +++ b/meta/recipes-core/initscripts/initscripts-1.0/bootmisc.sh
> @@ -54,14 +54,7 @@ fi
>
> #
> # This is as good a place as any for a sanity check
> -# /tmp should be a symlink to /var/tmp to cut down on the number
> -# of mounted ramdisks.
> -if test ! -L /tmp && test -d /var/tmp
> -then
> - rm -rf /tmp
> - ln -sf /var/tmp /tmp
> -fi
> -
> +#
> # Set the system clock from hardware clock
> # If the timestamp is more recent than the current time,
> # use the timestamp instead.
> diff --git
> a/meta/recipes-core/initscripts/initscripts-1.0/populate-volatile.sh
> b/meta/recipes-core/initscripts/initscripts-1.0/populate-volatile.sh
> index d2175d7..2691173 100755
> --- a/meta/recipes-core/initscripts/initscripts-1.0/populate-volatile.sh
> +++ b/meta/recipes-core/initscripts/initscripts-1.0/populate-volatile.sh
> @@ -8,192 +8,187 @@
> # Short-Description: Populate the volatile filesystem
> ### END INIT INFO
>
> -. /etc/default/rcS
> -
> -CFGDIR="/etc/default/volatiles"
> -TMPROOT="/var/tmp"
> +# Get ROOT_DIR
> +DIRNAME=`dirname $0`
> +ROOT_DIR=`echo $DIRNAME | sed -ne 's:etc/.*::p'`
> +
> +. ${ROOT_DIR}/etc/default/rcS
> +# When running populat-volatile.sh at rootfs time, disable cache.
> +[ "$ROOT_DIR" != "/" ] && VOLATILE_ENABLE_CACHE=no
> +# If rootfs is read-only, disable cache.
> +[ "$ROOTFS_READ_ONLY" = "yes" ] && VOLATILE_ENABLE_CACHE=no
> +# All above statements will be moved to a central place, say var.sh which
> +# encapsulates '. /etc/default/rcS'.
> +
> +CFGDIR="${ROOT_DIR}/etc/default/volatiles"
> +TMPROOT="${ROOT_DIR}/var/volatile/tmp"
> COREDEF="00_core"
> +COREDEF_READONLY="00_core_readonly"
Why a specific readonly file?
Couldn't it be done using a 01_sato_readonly? for example?
> -[ "${VERBOSE}" != "no" ] && echo "Populating volatile Filesystems."
> +[ "${VERBOSE}" != "no" ] && echo "Setting up basic files related to volatile
> storage under ${ROOT_DIR}."
>
> create_file() {
> - EXEC="
> - touch \"$1\";
> - chown ${TUSER}.${TGROUP} $1 || echo \"Failed to set owner -${TUSER}-
> for -$1-.\" >/dev/tty0 2>&1;
> - chmod ${TMODE} $1 || echo \"Failed to set mode -${TMODE}- for -$1-.\"
> >/dev/tty0 2>&1 "
> + EXEC="
> + touch \"$1\";
> + chown ${TUSER}.${TGROUP} $1 || echo \"Failed to set owner -${TUSER}-
> for -$1-.\" > /dev/null 2>&1;
> + chmod ${TMODE} $1 || echo \"Failed to set mode -${TMODE}- for -$1-.\"
> > /dev/null 2>&1 "
>
> test "$VOLATILE_ENABLE_CACHE" = yes && echo "$EXEC" >>
> /etc/volatile.cache.build
>
> [ -e "$1" ] && {
> - [ "${VERBOSE}" != "no" ] && echo "Target already exists. Skipping."
> + [ "${VERBOSE}" != "no" ] && echo "Target $1 already exists.
> Skipping."
> } || {
> - eval $EXEC &
> + if [ "$ROOT_DIR" = "/" ]; then
> + eval $EXEC
> + else
> + # Some operations at rootfs time may fail and should
> fail,
> + # but these failures should not be logged.
> + eval $EXEC > /dev/null 2>&1
> + fi
> }
> }
>
> mk_dir() {
> EXEC="
> mkdir -p \"$1\";
> - chown ${TUSER}.${TGROUP} $1 || echo \"Failed to set owner -${TUSER}-
> for -$1-.\" >/dev/tty0 2>&1;
> - chmod ${TMODE} $1 || echo \"Failed to set mode -${TMODE}- for -$1-.\"
> >/dev/tty0 2>&1 "
> + chown ${TUSER}.${TGROUP} $1 || echo \"Failed to set owner -${TUSER}-
> for -$1-.\" 2>&1;
> + chmod ${TMODE} $1 || echo \"Failed to set mode -${TMODE}- for -$1-.\"
> 2>&1 "
>
> test "$VOLATILE_ENABLE_CACHE" = yes && echo "$EXEC" >>
> /etc/volatile.cache.build
>
> [ -e "$1" ] && {
> - [ "${VERBOSE}" != "no" ] && echo "Target already exists. Skipping."
> + [ "${VERBOSE}" != "no" ] && echo "Target ${1} already exists.
> Skipping."
> } || {
> - eval $EXEC
> + if [ "$ROOT_DIR" = "/" ]; then
> + eval $EXEC
> + else
> + # Some operations at rootfs time may fail and should
> fail,
> + # but these failures should not be logged.
> + eval $EXEC > /dev/null 2>&1
> + fi
> }
> }
>
> link_file() {
> - EXEC="test -e \"$2\" -o -L $2 || ln -s \"$1\" \"$2\" >/dev/tty0 2>&1"
> -
> - test "$VOLATILE_ENABLE_CACHE" = yes && echo " $EXEC" >>
> /etc/volatile.cache.build
> -
> - [ -e "$2" ] && {
> - echo "Cannot create link over existing -${TNAME}-." >&2
> - } || {
> - eval $EXEC &
> - }
> + EXEC="
> + if [ -L \"$2\" ]; then
> + [ \"$(readlink -f \"$2\")\" != \"$(readlink -f \"$1\")\" ] &&
> { rm -f \"$2\"; ln -sf \"$1\" \"$2\"; };
> + elif [ -d \"$2\" ]; then
> + rm -rf \"$2\";
> + ln -sf \"$1\" \"$2\";
> + else
> + ln -sf \"$1\" \"$2\";
> + fi
> + "
> + test "$VOLATILE_ENABLE_CACHE" = yes && echo " $EXEC" >>
> /etc/volatile.cache.build
> + if [ "$ROOT_DIR" = "/" ]; then
> + eval $EXEC
> + else
> + # Some operations at rootfs time may fail and should fail,
> + # but these failures should not be logged
> + eval $EXEC > /dev/null 2>&1
> + fi
> }
>
> check_requirements() {
> + cleanup() {
> + rm "${TMP_INTERMED}"
> + rm "${TMP_DEFINED}"
> + rm "${TMP_COMBINED}"
> + }
> +
> + CFGFILE="$1"
> + [ `basename "${CFGFILE}"` = "${COREDEF}" ] && return 0
> + # $COREDEF_READONLY conf file should only be applied when rootfs is
> read-only
> + if [ `basename "${CFGFILE}"` = "${COREDEF_READONLY}" ]; then
> + [ "$ROOTFS_READ_ONLY" = "yes" ] && return 0 || return 1
> + fi
> +
> + TMP_INTERMED="${TMPROOT}/tmp.$$"
> + TMP_DEFINED="${TMPROOT}/tmpdefined.$$"
> + TMP_COMBINED="${TMPROOT}/tmpcombined.$$"
> +
> + cat ${ROOT_DIR}/etc/passwd | sed 's@\(^:\)*:.*@\1@' | sort | uniq >
> "${TMP_DEFINED}"
> + cat ${CFGFILE} | grep -v "^#" | cut -d " " -f 2 > "${TMP_INTERMED}"
> + cat "${TMP_DEFINED}" "${TMP_INTERMED}" | sort | uniq >
> "${TMP_COMBINED}"
> + NR_DEFINED_USERS="`cat "${TMP_DEFINED}" | wc -l`"
> + NR_COMBINED_USERS="`cat "${TMP_COMBINED}" | wc -l`"
> +
> + [ "${NR_DEFINED_USERS}" -ne "${NR_COMBINED_USERS}" ] && {
> + echo "Undefined users:"
> + diff "${TMP_DEFINED}" "${TMP_COMBINED}" | grep "^>"
> + cleanup
> + return 1
> + }
>
> - cleanup() {
> - rm "${TMP_INTERMED}"
> - rm "${TMP_DEFINED}"
> - rm "${TMP_COMBINED}"
> - }
> -
> - CFGFILE="$1"
> -
> - [ `basename "${CFGFILE}"` = "${COREDEF}" ] && return 0
> -
> - TMP_INTERMED="${TMPROOT}/tmp.$$"
> - TMP_DEFINED="${TMPROOT}/tmpdefined.$$"
> - TMP_COMBINED="${TMPROOT}/tmpcombined.$$"
> -
> -
> - cat /etc/passwd | sed 's@\(^:\)*:.*@\1@' | sort | uniq > "${TMP_DEFINED}"
> - cat ${CFGFILE} | grep -v "^#" | cut -d " " -f 2 > "${TMP_INTERMED}"
> - cat "${TMP_DEFINED}" "${TMP_INTERMED}" | sort | uniq > "${TMP_COMBINED}"
> -
> - NR_DEFINED_USERS="`cat "${TMP_DEFINED}" | wc -l`"
> - NR_COMBINED_USERS="`cat "${TMP_COMBINED}" | wc -l`"
> -
> - [ "${NR_DEFINED_USERS}" -ne "${NR_COMBINED_USERS}" ] && {
> - echo "Undefined users:"
> - diff "${TMP_DEFINED}" "${TMP_COMBINED}" | grep "^>"
> - cleanup
> - return 1
> - }
> -
> -
> - cat /etc/group | sed 's@\(^:\)*:.*@\1@' | sort | uniq > "${TMP_DEFINED}"
> - cat ${CFGFILE} | grep -v "^#" | cut -d " " -f 3 > "${TMP_INTERMED}"
> - cat "${TMP_DEFINED}" "${TMP_INTERMED}" | sort | uniq > "${TMP_COMBINED}"
>
> - NR_DEFINED_GROUPS="`cat "${TMP_DEFINED}" | wc -l`"
> - NR_COMBINED_GROUPS="`cat "${TMP_COMBINED}" | wc -l`"
> + cat ${ROOT_DIR}/etc/group | sed 's@\(^:\)*:.*@\1@' | sort | uniq >
> "${TMP_DEFINED}"
> + cat ${CFGFILE} | grep -v "^#" | cut -d " " -f 3 > "${TMP_INTERMED}"
> + cat "${TMP_DEFINED}" "${TMP_INTERMED}" | sort | uniq >
> "${TMP_COMBINED}"
>
> - [ "${NR_DEFINED_GROUPS}" -ne "${NR_COMBINED_GROUPS}" ] && {
> - echo "Undefined groups:"
> - diff "${TMP_DEFINED}" "${TMP_COMBINED}" | grep "^>"
> - cleanup
> - return 1
> - }
> + NR_DEFINED_GROUPS="`cat "${TMP_DEFINED}" | wc -l`"
> + NR_COMBINED_GROUPS="`cat "${TMP_COMBINED}" | wc -l`"
>
> - # Add checks for required directories here
> + [ "${NR_DEFINED_GROUPS}" -ne "${NR_COMBINED_GROUPS}" ] && {
> + echo "Undefined groups:"
> + diff "${TMP_DEFINED}" "${TMP_COMBINED}" | grep "^>"
> + cleanup
> + return 1
> + }
>
> - cleanup
> - return 0
> - }
> + cleanup
> + return 0
> +}
>
> apply_cfgfile() {
> + CFGFILE="$1"
> + [ ${VERBOSE} != "no" ] && echo "Applying config file: $CFGFILE"
> +
> + check_requirements "${CFGFILE}" || {
> + echo "Skipping ${CFGFILE}"
> + return 1
> + }
> +
> + cat ${CFGFILE} | grep -v "^#" | sed -e '/^$/ d' | \
> + while read LINE; do
> + eval `echo "$LINE" | sed -n "s/\(.*\)\ \(.*\) \(.*\)\ \(.*\)\
> \(.*\)\ \(.*\)/TTYPE=\1 ; TUSER=\2; TGROUP=\3; TMODE=\4; TNAME=\5
> TLTARGET=\6/p"`
> + TNAME=${ROOT_DIR}/${TNAME}
> + [ "${VERBOSE}" != "no" ] && echo "Checking for -${TNAME}-."
> +
> + [ "${TTYPE}" = "l" ] && {
> + TSOURCE="$TLTARGET"
> + [ "${VERBOSE}" != "no" ] && echo "Creating link
> -${TNAME}- pointing to -${TSOURCE}-."
> + link_file "${TSOURCE}" "${TNAME}"
> + continue
> + }
> + case "${TTYPE}" in
> + "f") [ "${VERBOSE}" != "no" ] && echo "Creating file
> -${TNAME}-."
> + create_file "${TNAME}"
> + ;;
> + "d") [ "${VERBOSE}" != "no" ] && echo "Creating
> directory -${TNAME}-."
> + mk_dir "${TNAME}"
> + ;;
> + *) [ "${VERBOSE}" != "no" ] && echo "Invalid type
> -${TTYPE}-."
> + continue
> + ;;
> + esac
> + done
> + return 0
> +}
>
> - CFGFILE="$1"
> -
> - check_requirements "${CFGFILE}" || {
> - echo "Skipping ${CFGFILE}"
> - return 1
> - }
> -
> - cat ${CFGFILE} | grep -v "^#" | \
> - while read LINE; do
> -
> - eval `echo "$LINE" | sed -n "s/\(.*\)\ \(.*\) \(.*\)\ \(.*\)\ \(.*\)\
> \(.*\)/TTYPE=\1 ; TUSER=\2; TGROUP=\3; TMODE=\4; TNAME=\5 TLTARGET=\6/p"`
> -
> - [ "${VERBOSE}" != "no" ] && echo "Checking for -${TNAME}-."
> -
> -
> - [ "${TTYPE}" = "l" ] && {
> - TSOURCE="$TLTARGET"
> - [ -L "${TNAME}" ] || {
> - [ "${VERBOSE}" != "no" ] && echo "Creating link -${TNAME}- pointing
> to -${TSOURCE}-."
> - link_file "${TSOURCE}" "${TNAME}" &
> - }
> - continue
> - }
> -
> - [ -L "${TNAME}" ] && {
> - [ "${VERBOSE}" != "no" ] && echo "Found link."
> - NEWNAME=`ls -l "${TNAME}" | sed -e 's/^.*-> \(.*\)$/\1/'`
> - echo ${NEWNAME} | grep -v "^/" >/dev/null && {
> - TNAME="`echo ${TNAME} | sed -e 's@\(.*\)/.*@\1@'`/${NEWNAME}"
> - [ "${VERBOSE}" != "no" ] && echo "Converted relative linktarget to
> absolute path -${TNAME}-."
> - } || {
> - TNAME="${NEWNAME}"
> - [ "${VERBOSE}" != "no" ] && echo "Using absolute link target
> -${TNAME}-."
> - }
> - }
> -
> - case "${TTYPE}" in
> - "f") [ "${VERBOSE}" != "no" ] && echo "Creating file -${TNAME}-."
> - create_file "${TNAME}" &
> - ;;
> - "d") [ "${VERBOSE}" != "no" ] && echo "Creating directory -${TNAME}-."
> - mk_dir "${TNAME}"
> - # Add check to see if there's an entry in fstab to mount.
> - ;;
> - *) [ "${VERBOSE}" != "no" ] && echo "Invalid type -${TTYPE}-."
> - continue
> - ;;
> - esac
> -
> -
> - done
> -
> - return 0
> -
> - }
> -
> -clearcache=0
> -exec 9</proc/cmdline
> -while read line <&9
> -do
> - case "$line" in
> - *clearcache*) clearcache=1
> - ;;
> - *) continue
> - ;;
> - esac
> -done
> -exec 9>&-
> -
> -if test -e /etc/volatile.cache -a "$VOLATILE_ENABLE_CACHE" = "yes" -a "x$1"
> != "xupdate" -a "x$clearcache" = "x0"
> +if test -e ${ROOT_DIR}/etc/volatile.cache -a $VOLATILE_ENABLE_CACHE = yes -a
> x$1 != xupdate
> then
> - sh /etc/volatile.cache
> + sh ${ROOT_DIR}/etc/volatile.cache
> else
> - rm -f /etc/volatile.cache /etc/volatile.cache.build
> + rm -f ${ROOT_DRI}/etc/volatile.cache
> ${ROOT_DIR}/etc/volatile.cache.build
> for file in `ls -1 "${CFGDIR}" | sort`; do
> apply_cfgfile "${CFGDIR}/${file}"
> done
>
> - [ -e /etc/volatile.cache.build ] && sync && mv
> /etc/volatile.cache.build /etc/volatile.cache
> + [ -e ${ROOT_DIR}/etc/volatile.cache.build ] && sync && mv
> ${ROOT_DIR}/etc/volatile.cache.build ${ROOT_DIR}/etc/volatile.cache
> fi
>
> -if test -f /etc/ld.so.cache -a ! -f /var/run/ld.so.cache
> +if [ "${ROOT_DIR}" = "/" ] && [ -f /etc/ld.so.cache ] && [ ! -f
> /var/run/ld.so.cache ]
> then
> ln -s /etc/ld.so.cache /var/run/ld.so.cache
> fi
> diff --git a/meta/recipes-core/initscripts/initscripts-1.0/volatiles
> b/meta/recipes-core/initscripts/initscripts-1.0/volatiles
> index e0741aa..f7e2ef7 100644
> --- a/meta/recipes-core/initscripts/initscripts-1.0/volatiles
> +++ b/meta/recipes-core/initscripts/initscripts-1.0/volatiles
> @@ -31,6 +31,7 @@ l root root 1777 /var/lock /var/volatile/lock
> l root root 0755 /var/log /var/volatile/log
> l root root 0755 /var/run /var/volatile/run
> l root root 1777 /var/tmp /var/volatile/tmp
> +l root root 1777 /tmp /var/tmp
> d root root 0755 /var/lock/subsys none
> f root root 0664 /var/log/wtmp none
> f root root 0664 /var/run/utmp none
> diff --git
> a/meta/recipes-core/initscripts/initscripts-1.0/volatiles-readonly-minimal
> b/meta/recipes-core/initscripts/initscripts-1.0/volatiles-readonly-minimal
> new file mode 100644
> index 0000000..aea5a53
> --- /dev/null
> +++ b/meta/recipes-core/initscripts/initscripts-1.0/volatiles-readonly-minimal
> @@ -0,0 +1,8 @@
> +# This configuration file lists filesystem objects specific to minimal image
> +# with read-only rootfs.
> +# This configuration file will only be applied if the image is minimal and
> the
> +# rootfs is read-only.
> +# For the detailed format information, refer to
> /etc/default/volatiles/00_core.
> +d root root 0755 /var/volatile/lib/ none
> +d root root 0755 /var/volatile/lib/urandom/ none
> +l root root 0755 /var/lib/urandom /var/volatile/lib/urandom
> \ No newline at end of file
> diff --git
> a/meta/recipes-core/initscripts/initscripts-1.0/volatiles-readonly-sato
> b/meta/recipes-core/initscripts/initscripts-1.0/volatiles-readonly-sato
> new file mode 100644
> index 0000000..4a56b81
> --- /dev/null
> +++ b/meta/recipes-core/initscripts/initscripts-1.0/volatiles-readonly-sato
> @@ -0,0 +1,14 @@
> +# This configuration file lists filesystem objects specific to sato image
> +# with read-only rootfs.
> +# This configuration file will only be applied if the image is sato and the
> +# rootfs is read-only.
> +# For the detailed format information, refer to
> /etc/default/volatiles/00_core.
> +d root root 0755 /var/volatile/lib/ none
> +d root root 0755 /var/volatile/lib/urandom/ none
> +d root root 0755 /var/volatile/lib/dropbear/ none
> +d root root 0755 /var/volatile/lib/nfs/ none
> +d root root 0755 /var/volatile/lib/dbus/ none
> +l root root 0755 /var/lib/urandom /var/volatile/lib/urandom
> +l root root 0755 /var/lib/dropbear /var/volatile/lib/dropbear
> +l root root 0755 /var/lib/nfs /var/volatile/lib/nfs
> +l root root 0755 /var/lib/dbus /var/volatile/lib/dbus
> diff --git a/meta/recipes-core/initscripts/initscripts_1.0.bb
> b/meta/recipes-core/initscripts/initscripts_1.0.bb
> index 39be9a8..f111e91 100644
> --- a/meta/recipes-core/initscripts/initscripts_1.0.bb
> +++ b/meta/recipes-core/initscripts/initscripts_1.0.bb
> @@ -3,7 +3,7 @@ DESCRIPTION = "Initscripts provide the basic system startup
> initialization scrip
> SECTION = "base"
> LICENSE = "GPLv2"
> LIC_FILES_CHKSUM = "file://COPYING;md5=751419260aa954499f7abaabaa882bbe"
> -PR = "r138"
> +PR = "r139"
>
> INHIBIT_DEFAULT_DEPS = "1"
>
> @@ -30,8 +30,10 @@ SRC_URI = "file://functions \
> file://device_table.txt \
> file://populate-volatile.sh \
> file://volatiles \
> + file://volatiles-readonly-minimal \
> + file://volatiles-readonly-sato \
> file://save-rtc.sh \
> - file://GPLv2.patch"
> + file://GPLv2.patch"
>
> SRC_URI_append_arm = " file://alignment.sh"
>
> @@ -65,6 +67,7 @@ do_install () {
> install -d ${D}${sysconfdir}/rc6.d
> install -d ${D}${sysconfdir}/default
> install -d ${D}${sysconfdir}/default/volatiles
> + install -d ${D}${sysconfdir}/default/volatiles_stage
>
> install -m 0644 ${WORKDIR}/functions
> ${D}${sysconfdir}/init.d
> install -m 0755 ${WORKDIR}/bootmisc.sh
> ${D}${sysconfdir}/init.d
> @@ -86,6 +89,10 @@ do_install () {
> install -m 0755 ${WORKDIR}/populate-volatile.sh
> ${D}${sysconfdir}/init.d
> install -m 0755 ${WORKDIR}/save-rtc.sh
> ${D}${sysconfdir}/init.d
> install -m 0644 ${WORKDIR}/volatiles
> ${D}${sysconfdir}/default/volatiles/00_core
> + # Install read-only rootfs specific config files
> + install -m 0644 ${WORKDIR}/volatiles-readonly-sato
> ${D}${sysconfdir}/default/volatiles_stage/volatiles-readonly-sato
> + install -m 0644 ${WORKDIR}/volatiles-readonly-minimal
> ${D}${sysconfdir}/default/volatiles_stage/volatiles-readonly-minimal
> +
> if [ "${TARGET_ARCH}" = "arm" ]; then
> install -m 0755 ${WORKDIR}/alignment.sh
> ${D}${sysconfdir}/init.d
> fi
> --
> 1.7.9.5
>
>
> _______________________________________________
> Openembedded-core mailing list
> Openembedded-core@lists.openembedded.org
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--
Otavio Salvador O.S. Systems
E-mail: ota...@ossystems.com.br http://www.ossystems.com.br
Mobile: +55 53 9981-7854 http://projetos.ossystems.com.br
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