152 lines
3.8 KiB
Bash
152 lines
3.8 KiB
Bash
#!/bin/bash
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# Install abrt coredump hook
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#
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# chkconfig: 35 82 16
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# description: Installs coredump handler which saves segfault data
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### BEGIN INIT INFO
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# Provides: abrt-ccpp
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# Required-Start: $abrtd
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# Default-Stop: 0 1 2 6
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# Default-Start: 3 5
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# Short-Description: Installs coredump handler which saves segfault data
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# Description: Installs coredump handler which saves segfault data
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### END INIT INFO
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# Source function library.
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. /etc/rc.d/init.d/functions
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# For debugging
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dry_run=false
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verbose=false
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# We don't have pid files, therefore have to use
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# a flag file in /var/lock/subsys to enable GUI service tools
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# to figure out our status
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LOCK="/var/lock/subsys/abrt-ccpp"
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PATTERN_FILE="/proc/sys/kernel/core_pattern"
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SAVED_PATTERN_FILE="/var/run/abrt/saved_core_pattern"
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HOOK_BIN="/usr/libexec/abrt-hook-ccpp"
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PATTERN="|$HOOK_BIN /var/spool/abrt %s %c %p %u %g %t %h %e"
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# core_pipe_limit specifies how many dump_helpers can run at the same time
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# 0 - means unlimited, but it's not guaranteed that /proc/<pid> of crashing
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# process will be available for dump_helper.
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# 4 - means that 4 dump_helpers can run at the same time (the rest will also
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# run, but they will fail to read /proc/<pid>).
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#
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# This should be enough for ABRT, we can miss some crashes, but what are
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# the odds that more processes crash at the same time? And moreover,
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# do people want to save EVERY ONE of the crashes when they have
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# a crash storm? I don't think so.
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# The value of 4 has been recommended by nhorman.
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#
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CORE_PIPE_LIMIT_FILE="/proc/sys/kernel/core_pipe_limit"
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CORE_PIPE_LIMIT="4"
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RETVAL=0
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check() {
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# Check that we're a privileged user
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[ "`id -u`" = 0 ] || exit 4
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}
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start() {
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check
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cur=`cat "$PATTERN_FILE"`
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cur_first=`printf "%s" "$cur" | sed 's/ .*//'`
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$verbose && printf "cur:'%s'\n" "$cur"
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# Is it already installed?
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if test x"$cur_first" != x"|$HOOK_BIN"; then # no
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# It is not installed
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printf "%s\n" "$cur" >"$SAVED_PATTERN_FILE"
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OLD_PATTERN=""
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# Does old pattern start with '|'?
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if test x"${cur#|}" = x"$cur"; then # no
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# Encode it as hex string, NUL terminated
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OLD_PATTERN=`printf "%s" "$cur" | od -tx1 | sed 's/000[^ ]*//' | xargs | sed 's/ //g'`
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$verbose && printf "OLD_PATTERN:'%s'\n" "$OLD_PATTERN"
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OLD_PATTERN=" ${OLD_PATTERN}00"
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fi
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# Install new handler
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$verbose && printf "Installing to %s:'%s'\n" "$PATTERN_FILE" "${PATTERN}${OLD_PATTERN}"
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$dry_run || echo "${PATTERN}${OLD_PATTERN}" >"$PATTERN_FILE"
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$dry_run || touch -- "$LOCK"
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# Check core_pipe_limit and change it if it's 0,
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# otherwise the abrt-hook-ccpp won't be able to read /proc/<pid>
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# of the crashing process
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if test x"`cat "$CORE_PIPE_LIMIT_FILE"`" = x"0"; then
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echo "$CORE_PIPE_LIMIT" >"$CORE_PIPE_LIMIT_FILE"
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fi
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fi
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return $RETVAL
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}
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stop() {
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check
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if test -f "$SAVED_PATTERN_FILE"; then
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$verbose && printf "Restoring to %s:'%s'\n" "$PATTERN_FILE" "`cat "$SAVED_PATTERN_FILE"`"
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$dry_run || cat "$SAVED_PATTERN_FILE" >"$PATTERN_FILE"
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fi
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$dry_run || rm -f -- "$LOCK"
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return $RETVAL
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}
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restart() {
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stop
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start
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}
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reload() {
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restart
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}
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case "$1" in
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start)
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start
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;;
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stop)
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stop
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;;
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reload)
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reload
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;;
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force-reload)
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echo "$0: Unimplemented feature."
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RETVAL=3
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;;
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restart)
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restart
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;;
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condrestart)
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cur=`cat "$PATTERN_FILE"`
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cur_first=`printf "%s" "$cur" | sed 's/ .*//'`
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# Is it already installed?
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if test x"$cur_first" = x"|$HOOK_BIN"; then # yes
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$verbose && printf "Installed, re-installing\n"
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restart
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fi
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;;
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status)
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cur=`cat "$PATTERN_FILE"`
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cur_first=`printf "%s" "$cur" | sed 's/ .*//'`
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# Is it already installed?
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if test x"$cur_first" = x"|$HOOK_BIN"; then # yes
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$verbose && printf "Installed\n"
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RETVAL=0
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else
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$verbose && printf "Not installed\n"
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RETVAL=3 # "stopped normally"
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fi
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;;
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*)
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echo $"Usage: $0 {start|stop|status|restart|condrestart|reload|force-reload}"
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RETVAL=2
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esac
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exit $RETVAL
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