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  1. # -*-Shell-script-*-
  2. #
  3. # functions     This file contains functions to be used by most or all
  4. #               shell scripts in the /etc/init.d directory.
  5. #
  6.  
  7. TEXTDOMAIN=initscripts
  8.  
  9. # Make sure umask is sane
  10. umask 022
  11.  
  12. # Set up a default search path.
  13. PATH="/sbin:/usr/sbin:/bin:/usr/bin"
  14. export PATH
  15.  
  16. # Get a sane screen width
  17. [ -z "${COLUMNS:-}" ] && COLUMNS=80
  18.  
  19. [ -z "${CONSOLETYPE:-}" ] && CONSOLETYPE="`/sbin/consoletype`"
  20.  
  21. if [ -f /etc/sysconfig/i18n -a -z "${NOLOCALE:-}" -a -z "${LANGSH_SOURCED:-}" ] ; then
  22.   . /etc/profile.d/lang.sh 2>/dev/null
  23.   # avoid propagating LANGSH_SOURCED any further
  24.   unset LANGSH_SOURCED
  25. fi
  26.  
  27. # Read in our configuration
  28. if [ -z "${BOOTUP:-}" ]; then
  29.   if [ -f /etc/sysconfig/init ]; then
  30.       . /etc/sysconfig/init
  31.   else
  32.     # This all seem confusing? Look in /etc/sysconfig/init,
  33.     # or in /usr/doc/initscripts-*/sysconfig.txt
  34.     BOOTUP=color
  35.     RES_COL=60
  36.     MOVE_TO_COL="echo -en \\033[${RES_COL}G"
  37.     SETCOLOR_SUCCESS="echo -en \\033[1;32m"
  38.     SETCOLOR_FAILURE="echo -en \\033[1;31m"
  39.     SETCOLOR_WARNING="echo -en \\033[1;33m"
  40.     SETCOLOR_NORMAL="echo -en \\033[0;39m"
  41.     LOGLEVEL=1
  42.   fi
  43.   if [ "$CONSOLETYPE" = "serial" ]; then
  44.       BOOTUP=serial
  45.       MOVE_TO_COL=
  46.       SETCOLOR_SUCCESS=
  47.       SETCOLOR_FAILURE=
  48.       SETCOLOR_WARNING=
  49.       SETCOLOR_NORMAL=
  50.   fi
  51. fi
  52.  
  53. # Interpret escape sequences in an fstab entry
  54. fstab_decode_str() {
  55.         fstab-decode echo "$1"
  56. }
  57.  
  58. # Check if $pid (could be plural) are running
  59. checkpid() {
  60.         local i
  61.  
  62.         for i in $* ; do
  63.                 [ -d "/proc/$i" ] && return 0
  64.         done
  65.         return 1
  66. }
  67.  
  68. __readlink() {
  69.     ls -bl "$@" 2>/dev/null| awk '{ print $NF }'
  70. }
  71.  
  72. __fgrep() {
  73.     s=$1
  74.     f=$2
  75.     while read line; do
  76.         if strstr "$line" "$s"; then
  77.             echo $line
  78.             return 0
  79.         fi
  80.     done < $f
  81.     return 1
  82. }
  83.  
  84. # __umount_loop awk_program fstab_file first_msg retry_msg umount_args
  85. # awk_program should process fstab_file and return a list of fstab-encoded
  86. # paths; it doesn't have to handle comments in fstab_file.
  87. __umount_loop() {
  88.         local remaining sig=
  89.         local retry=3 count
  90.  
  91.         remaining=$(LC_ALL=C awk "/^#/ {next} $1" "$2" | sort -r)
  92.         while [ -n "$remaining" -a "$retry" -gt 0 ]; do
  93.                 if [ "$retry" -eq 3 ]; then
  94.                         action "$3" fstab-decode umount $5 $remaining
  95.                 else
  96.                         action "$4" fstab-decode umount $5 $remaining
  97.                 fi
  98.                 count=4
  99.                 remaining=$(LC_ALL=C awk "/^#/ {next} $1" "$2" | sort -r)
  100.                 while [ "$count" -gt 0 ]; do
  101.                         [ -z "$remaining" ] && break
  102.                         count=$(($count-1))
  103.                         usleep 500000
  104.                         remaining=$(LC_ALL=C awk "/^#/ {next} $1" "$2" | sort -r)
  105.                 done
  106.                 [ -z "$remaining" ] && break
  107.                 fstab-decode /sbin/fuser -k -m $sig $remaining >/dev/null
  108.                 sleep 3
  109.                 retry=$(($retry -1))
  110.                 sig=-9
  111.         done
  112. }
  113.  
  114. # Similar to __umount loop above, specialized for loopback devices
  115. __umount_loopback_loop() {
  116.         local remaining devremaining sig=
  117.         local retry=3
  118.  
  119.         remaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $2}' /proc/mounts)
  120.         devremaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $1}' /proc/mounts)
  121.         while [ -n "$remaining" -a "$retry" -gt 0 ]; do
  122.                 if [ "$retry" -eq 3 ]; then
  123.                         action $"Unmounting loopback filesystems: " \
  124.                                 fstab-decode umount $remaining
  125.                 else
  126.                         action $"Unmounting loopback filesystems (retry):" \
  127.                                 fstab-decode umount $remaining
  128.                 fi
  129.                 for dev in $devremaining ; do
  130.                         losetup $dev > /dev/null 2>&1 && \
  131.                                 action $"Detaching loopback device $dev: " \
  132.                                 losetup -d $dev
  133.                 done
  134.                 remaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $2}' /proc/mounts)
  135.                 devremaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $1}' /proc/mounts)
  136.                 [ -z "$remaining" ] && break
  137.                 fstab-decode /sbin/fuser -k -m $sig $remaining >/dev/null
  138.                 sleep 3
  139.                 retry=$(($retry -1))
  140.                 sig=-9
  141.         done
  142. }
  143.  
  144. # __proc_pids {program} [pidfile]
  145. # Set $pid to pids from /var/run* for {program}.  $pid should be declared
  146. # local in the caller.
  147. # Returns LSB exit code for the 'status' action.
  148. __pids_var_run() {
  149.         local base=${1##*/}
  150.         local pid_file=${2:-/var/run/$base.pid}
  151.  
  152.         pid=
  153.         if [ -f "$pid_file" ] ; then
  154.                 local line p
  155.  
  156.                 while : ; do
  157.                         read line
  158.                         [ -z "$line" ] && break
  159.                         for p in $line ; do
  160.                                 [ -z "${p//[0-9]/}" -a -d "/proc/$p" ] && pid="$pid $p"
  161.                         done
  162.                 done < "$pid_file"
  163.  
  164.                 if [ -n "$pid" ]; then
  165.                         return 0
  166.                 fi
  167.                 return 1 # "Program is dead and /var/run pid file exists"
  168.         fi
  169.         return 3 # "Program is not running"
  170. }
  171.  
  172. # Output PIDs of matching processes, found using pidof
  173. __pids_pidof() {
  174.         pidof -c -o $$ -o $PPID -o %PPID -x "$1" || \
  175.                 pidof -c -o $$ -o $PPID -o %PPID -x "${1##*/}"
  176. }
  177.  
  178.  
  179. # A function to start a program.
  180. daemon() {
  181.         # Test syntax.
  182.         local gotbase= force= nicelevel corelimit
  183.         local pid base= user= nice= bg= pid_file=
  184.         local cgroup=
  185.         nicelevel=0
  186.         while [ "$1" != "${1##[-+]}" ]; do
  187.           case $1 in
  188.             '')    echo $"$0: Usage: daemon [+/-nicelevel] {program}"
  189.                    return 1;;
  190.             --check)
  191.                    base=$2
  192.                    gotbase="yes"
  193.                    shift 2
  194.                    ;;
  195.             --check=?*)
  196.                    base=${1#--check=}
  197.                    gotbase="yes"
  198.                    shift
  199.                    ;;
  200.             --user)
  201.                    user=$2
  202.                    shift 2
  203.                    ;;
  204.             --user=?*)
  205.                    user=${1#--user=}
  206.                    shift
  207.                    ;;
  208.             --pidfile)
  209.                    pid_file=$2
  210.                    shift 2
  211.                    ;;
  212.             --pidfile=?*)
  213.                    pid_file=${1#--pidfile=}
  214.                    shift
  215.                    ;;
  216.             --force)
  217.                    force="force"
  218.                    shift
  219.                    ;;
  220.             [-+][0-9]*)
  221.                    nice="nice -n $1"
  222.                    shift
  223.                    ;;
  224.             *)     echo $"$0: Usage: daemon [+/-nicelevel] {program}"
  225.                    return 1;;
  226.           esac
  227.         done
  228.  
  229.         # Save basename.
  230.         [ -z "$gotbase" ] && base=${1##*/}
  231.  
  232.         # See if it's already running. Look *only* at the pid file.
  233.         __pids_var_run "$base" "$pid_file"
  234.  
  235.         [ -n "$pid" -a -z "$force" ] && return
  236.  
  237.         # make sure it doesn't core dump anywhere unless requested
  238.         corelimit="ulimit -S -c ${DAEMON_COREFILE_LIMIT:-0}"
  239.        
  240.         # if they set NICELEVEL in /etc/sysconfig/foo, honor it
  241.         [ -n "${NICELEVEL:-}" ] && nice="nice -n $NICELEVEL"
  242.        
  243.         # if they set CGROUP_DAEMON in /etc/sysconfig/foo, honor it
  244.         if [ -n "${CGROUP_DAEMON}" ]; then
  245.                 if [ ! -x /bin/cgexec ]; then
  246.                         echo -n "Cgroups not installed"; warning
  247.                         echo
  248.                 else
  249.                         cgroup="/bin/cgexec";
  250.                         for i in $CGROUP_DAEMON; do
  251.                                 cgroup="$cgroup -g $i";
  252.                         done
  253.                 fi
  254.         fi
  255.  
  256.         # Echo daemon
  257.         [ "${BOOTUP:-}" = "verbose" -a -z "${LSB:-}" ] && echo -n " $base"
  258.  
  259.         # And start it up.
  260.         if [ -z "$user" ]; then
  261.            $cgroup $nice /bin/bash -c "$corelimit >/dev/null 2>&1 ; $*"
  262.         else
  263.            $cgroup $nice runuser -s /bin/bash - $user -c "$corelimit >/dev/null 2>&1 ; $*"
  264.         fi
  265.  
  266.         [ "$?" -eq 0 ] && success $"$base startup" || failure $"$base startup"
  267. }
  268.  
  269. # A function to stop a program.
  270. killproc() {
  271.         local RC killlevel= base pid pid_file= delay
  272.  
  273.         RC=0; delay=3
  274.         # Test syntax.
  275.         if [ "$#" -eq 0 ]; then
  276.                 echo $"Usage: killproc [-p pidfile] [ -d delay] {program} [-signal]"
  277.                 return 1
  278.         fi
  279.         if [ "$1" = "-p" ]; then
  280.                 pid_file=$2
  281.                 shift 2
  282.         fi
  283.         if [ "$1" = "-d" ]; then
  284.                 delay=$2
  285.                 shift 2
  286.         fi
  287.        
  288.  
  289.         # check for second arg to be kill level
  290.         [ -n "${2:-}" ] && killlevel=$2
  291.  
  292.         # Save basename.
  293.         base=${1##*/}
  294.  
  295.         # Find pid.
  296.         __pids_var_run "$1" "$pid_file"
  297.         if [ -z "$pid_file" -a -z "$pid" ]; then
  298.                 pid="$(__pids_pidof "$1")"
  299.         fi
  300.  
  301.         # Kill it.
  302.         if [ -n "$pid" ] ; then
  303.                 [ "$BOOTUP" = "verbose" -a -z "${LSB:-}" ] && echo -n "$base "
  304.                 if [ -z "$killlevel" ] ; then
  305.                        if checkpid $pid 2>&1; then
  306.                            # TERM first, then KILL if not dead
  307.                            kill -TERM $pid >/dev/null 2>&1
  308.                            usleep 100000
  309.                            if checkpid $pid && sleep 1 &&
  310.                               checkpid $pid && sleep $delay &&
  311.                               checkpid $pid ; then
  312.                                 kill -KILL $pid >/dev/null 2>&1
  313.                                 usleep 100000
  314.                            fi
  315.                         fi
  316.                         checkpid $pid
  317.                         RC=$?
  318.                         [ "$RC" -eq 0 ] && failure $"$base shutdown" || success $"$base shutdown"
  319.                         RC=$((! $RC))
  320.                 # use specified level only
  321.                 else
  322.                         if checkpid $pid; then
  323.                                 kill $killlevel $pid >/dev/null 2>&1
  324.                                 RC=$?
  325.                                 [ "$RC" -eq 0 ] && success $"$base $killlevel" || failure $"$base $killlevel"
  326.                         elif [ -n "${LSB:-}" ]; then
  327.                                 RC=7 # Program is not running
  328.                         fi
  329.                 fi
  330.         else
  331.                 if [ -n "${LSB:-}" -a -n "$killlevel" ]; then
  332.                         RC=7 # Program is not running
  333.                 else
  334.                         failure $"$base shutdown"
  335.                         RC=0
  336.                 fi
  337.         fi
  338.  
  339.         # Remove pid file if any.
  340.         if [ -z "$killlevel" ]; then
  341.             rm -f "${pid_file:-/var/run/$base.pid}"
  342.         fi
  343.         return $RC
  344. }
  345.  
  346. # A function to find the pid of a program. Looks *only* at the pidfile
  347. pidfileofproc() {
  348.         local pid
  349.  
  350.         # Test syntax.
  351.         if [ "$#" = 0 ] ; then
  352.                 echo $"Usage: pidfileofproc {program}"
  353.                 return 1
  354.         fi
  355.  
  356.         __pids_var_run "$1"
  357.         [ -n "$pid" ] && echo $pid
  358.         return 0
  359. }
  360.  
  361. # A function to find the pid of a program.
  362. pidofproc() {
  363.         local RC pid pid_file=
  364.  
  365.         # Test syntax.
  366.         if [ "$#" = 0 ]; then
  367.                 echo $"Usage: pidofproc [-p pidfile] {program}"
  368.                 return 1
  369.         fi
  370.         if [ "$1" = "-p" ]; then
  371.                 pid_file=$2
  372.                 shift 2
  373.         fi
  374.         fail_code=3 # "Program is not running"
  375.  
  376.         # First try "/var/run/*.pid" files
  377.         __pids_var_run "$1" "$pid_file"
  378.         RC=$?
  379.         if [ -n "$pid" ]; then
  380.                 echo $pid
  381.                 return 0
  382.         fi
  383.  
  384.         [ -n "$pid_file" ] && return $RC
  385.         __pids_pidof "$1" || return $RC
  386. }
  387.  
  388. status() {
  389.         local base pid pid_file=
  390.  
  391.         # Test syntax.
  392.         if [ "$#" = 0 ] ; then
  393.                 echo $"Usage: status [-p pidfile] {program}"
  394.                 return 1
  395.         fi
  396.         if [ "$1" = "-p" ]; then
  397.                 pid_file=$2
  398.                 shift 2
  399.         fi
  400.         base=${1##*/}
  401.  
  402.         # First try "pidof"
  403.         __pids_var_run "$1" "$pid_file"
  404.         RC=$?
  405.         if [ -z "$pid_file" -a -z "$pid" ]; then
  406.                 pid="$(__pids_pidof "$1")"
  407.         fi
  408.         if [ -n "$pid" ]; then
  409.                 echo $"${base} (pid $pid) is running..."
  410.                 return 0
  411.         fi
  412.  
  413.         case "$RC" in
  414.                 0)
  415.                         echo $"${base} (pid $pid) is running..."
  416.                         return 0
  417.                         ;;
  418.                 1)
  419.                         echo $"${base} dead but pid file exists"
  420.                         return 1
  421.                         ;;
  422.         esac
  423.         # See if /var/lock/subsys/${base} exists
  424.         if [ -f /var/lock/subsys/${base} ]; then
  425.                 echo $"${base} dead but subsys locked"
  426.                 return 2
  427.         fi
  428.         echo $"${base} is stopped"
  429.         return 3
  430. }
  431.  
  432. echo_success() {
  433.   [ "$BOOTUP" = "color" ] && $MOVE_TO_COL
  434.   echo -n "["
  435.   [ "$BOOTUP" = "color" ] && $SETCOLOR_SUCCESS
  436.   echo -n $"  OK  "
  437.   [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  438.   echo -n "]"
  439.   echo -ne "\r"
  440.   return 0
  441. }
  442.  
  443. echo_failure() {
  444.   [ "$BOOTUP" = "color" ] && $MOVE_TO_COL
  445.   echo -n "["
  446.   [ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
  447.   echo -n $"FAILED"
  448.   [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  449.   echo -n "]"
  450.   echo -ne "\r"
  451.   return 1
  452. }
  453.  
  454. echo_passed() {
  455.   [ "$BOOTUP" = "color" ] && $MOVE_TO_COL
  456.   echo -n "["
  457.   [ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
  458.   echo -n $"PASSED"
  459.   [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  460.   echo -n "]"
  461.   echo -ne "\r"
  462.   return 1
  463. }
  464.  
  465. echo_warning() {
  466.   [ "$BOOTUP" = "color" ] && $MOVE_TO_COL
  467.   echo -n "["
  468.   [ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
  469.   echo -n $"WARNING"
  470.   [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  471.   echo -n "]"
  472.   echo -ne "\r"
  473.   return 1
  474. }
  475.  
  476. # Inform the graphical boot of our current state
  477. update_boot_stage() {
  478.   if [ -x /usr/bin/plymouth ]; then
  479.       /usr/bin/plymouth --update="$1"
  480.   fi
  481.   return 0
  482. }
  483.  
  484. # Log that something succeeded
  485. success() {
  486.   [ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_success
  487.   return 0
  488. }
  489.  
  490. # Log that something failed
  491. failure() {
  492.   local rc=$?
  493.   [ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_failure
  494.   [ -x /usr/bin/plymouth ] && /usr/bin/plymouth --details
  495.   return $rc
  496. }
  497.  
  498. # Log that something passed, but may have had errors. Useful for fsck
  499. passed() {
  500.   local rc=$?
  501.   [ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_passed
  502.   return $rc
  503. }  
  504.  
  505. # Log a warning
  506. warning() {
  507.   local rc=$?
  508.   [ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_warning
  509.   return $rc
  510. }  
  511.  
  512. # Run some action. Log its output.
  513. action() {
  514.   local STRING rc
  515.  
  516.   STRING=$1
  517.   echo -n "$STRING "
  518.   shift
  519.   "$@" && success $"$STRING" || failure $"$STRING"
  520.   rc=$?
  521.   echo
  522.   return $rc
  523. }
  524.  
  525. # returns OK if $1 contains $2
  526. strstr() {
  527.   [ "${1#*$2*}" = "$1" ] && return 1
  528.   return 0
  529. }
  530.  
  531. # Confirm whether we really want to run this service
  532. confirm() {
  533.   [ -x /usr/bin/plymouth ] && /usr/bin/plymouth --hide-splash
  534.   while : ; do
  535.       echo -n $"Start service $1 (Y)es/(N)o/(C)ontinue? [Y] "
  536.       read answer
  537.       if strstr $"yY" "$answer" || [ "$answer" = "" ] ; then
  538.          return 0
  539.       elif strstr $"cC" "$answer" ; then
  540.          rm -f /var/run/confirm
  541.          [ -x /usr/bin/plymouth ] && /usr/bin/plymouth --show-splash
  542.          return 2
  543.       elif strstr $"nN" "$answer" ; then
  544.          return 1
  545.       fi
  546.   done
  547. }
  548.  
  549. # resolve a device node to its major:minor numbers in decimal or hex
  550. get_numeric_dev() {
  551. (
  552.     fmt="%d:%d"
  553.     if [ "$1" == "hex" ]; then
  554.         fmt="%x:%x"
  555.     fi
  556.     ls -lH "$2" | awk '{ sub(/,/, "", $5); printf("'"$fmt"'", $5, $6); }'
  557. ) 2>/dev/null
  558. }
  559.  
  560. # Check whether file $1 is a backup or rpm-generated file and should be ignored
  561. is_ignored_file() {
  562.     case "$1" in
  563.         *~ | *.bak | *.orig | *.rpmnew | *.rpmorig | *.rpmsave)
  564.             return 0
  565.             ;;
  566.     esac
  567.     return 1
  568. }
  569. # A sed expression to filter out the files that is_ignored_file recognizes
  570. __sed_discard_ignored_files='/\(~\|\.bak\|\.orig\|\.rpmnew\|\.rpmorig\|\.rpmsave\)$/d'
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