This file is indexed.

/lib/init/bootclean.sh is in initscripts 2.88dsf-59.9.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
# bootclean
#
# Clean /tmp, /run and /var/lock if not mounted as tmpfs
#
# DO NOT RUN AFTER S:55bootmisc.sh and do not run this script directly
# in runlevel S. Instead write an initscript to call it.
#

. /lib/init/vars.sh
. /lib/lsb/init-functions

# Should be called outside verbose message block
mkflagfile()
{
	# Prevent symlink attack  (See #264234.)
	[ -L "$1" ] && log_warning_msg "bootclean: Deleting symbolic link '$1'."
	rm -f "$1" || { log_failure_msg "bootclean: Failure deleting '$1'." ; return 1 ; }
	# No user processes should be running, so no one should be
	# able to introduce a symlink here.  As an extra precaution,
	# set noclobber.
	set -o noclobber
	:> "$1" || { log_failure_msg "bootclean: Failure creating '$1'." ; return 1 ; }
	return 0
}

checkflagfile()
{
	if [ -f $1/.clean ]
	then
		which stat >/dev/null 2>&1 && cleanuid="$(stat -c %u $1/.clean)"
		# Poor's man stat %u, since stat (and /usr) might not
		# be available in some bootup stages
		[ "$cleanuid" ] || cleanuid="$(find $1/.clean -printf %U)"
		[ "$cleanuid" ] || { log_failure_msg "bootclean: Could not stat '$1/.clean'." ; return 1 ; }
		if [ "$cleanuid" -ne 0 ]
		then
			rm -f $1/.clean || { log_failure_msg "bootclean: Could not delete '$1/.clean'." ; return 1 ; }
		fi
	fi
	return 0
}

	report_err()
	{
		dir="$1"
		if [ "$VERBOSE" = no ]
		then
			log_failure_msg "bootclean: Failure cleaning ${dir}."
		else
			log_action_end_msg 1 "bootclean: Failure cleaning ${dir}"
		fi
	}

clean_tmp() {
	# Does not exist
	[ -d /tmp ] || return 1
	# tmpfs does not require cleaning
	[ -f /tmp/.tmpfs ] && return 0
	# Can clean?
	checkflagfile /tmp || return 0
	# Already cleaned
	[ -f /tmp/.clean ] && return 0
	# Can't clean yet?
	which find >/dev/null 2>&1 || return 1

	cd /tmp || { log_failure_msg "bootclean: Could not cd to /tmp." ; return 1 ; }

	#
	# Only clean out /tmp if it is world-writable. This ensures
	# it really is a/the temp directory we're cleaning.
	#
	[ "$(find . -maxdepth 0 -perm -002)" = "." ] || return 0

	if [ ! "$TMPTIME" ]
	then
		log_warning_msg "Using default TMPTIME 0."
		TMPTIME=0
	fi

	[ "$VERBOSE" = no ] || log_action_begin_msg "Cleaning /tmp"

	#
	# Remove regardless of TMPTIME setting
	#
	rm -f .X*-lock

	#
	# Don't clean remaining files if TMPTIME is negative or 'infinite'
	#
	case "$TMPTIME" in
	  -*|infinite|infinity)
		[ "$VERBOSE" = no ] || log_action_end_msg 0 "skipped"
		return 0
		;;
	esac

	#
	# Wipe /tmp, excluding system files, but including lost+found
	#
	# If TMPTIME is set to 0, we do not use any ctime expression
	# at all, so we can also delete files with timestamps
	# in the future!
	#
	if [ "$TMPTIME" = 0 ]
	then
		TEXPR=""
		DEXPR=""
	else
		TEXPR="-mtime +$TMPTIME -ctime +$TMPTIME -atime +$TMPTIME"
		DEXPR="-mtime +$TMPTIME -ctime +$TMPTIME"
	fi

	EXCEPT='! -name .
		! ( -path ./lost+found -uid 0 )
		! ( -path ./quota.user -uid 0 )
		! ( -path ./aquota.user -uid 0 )
		! ( -path ./quota.group -uid 0 )
		! ( -path ./aquota.group -uid 0 )
		! ( -path ./.journal -uid 0 )
		! ( -path ./.clean -uid 0 )
		! ( -path './...security*' -uid 0 )'

	mkflagfile /tmp/.clean || return 1

	#
	# First remove all old files...
	#
	find . -depth -xdev $TEXPR $EXCEPT ! -type d -delete \
		|| { report_err "/tmp"; return 1 ; }

	#
	# ...and then all empty directories
	#
	find . -depth -xdev $DEXPR $EXCEPT -type d -empty -delete \
		|| { report_err "/tmp"; return 1 ; }

	[ "$VERBOSE" = no ] || log_action_end_msg 0
	log_progress_msg "/tmp"
	return 0
}

clean() {
	dir="$1"
	findopts="$2"

	# Does not exist
	[ -d "$dir" ] || return 1
	# tmpfs does not require cleaning
	[ -f "$dir/.tmpfs" ] && return 0
	# Can clean?
	checkflagfile "$dir" || return 0
	# Already cleaned
	[ -f "${dir}/.clean" ] && return 0
	# Can't clean yet?
	which find >/dev/null 2>&1 || return 1

	cd "$dir" || { log_action_end_msg 1 "bootclean: Could not cd to ${dir}." ; return 1 ; }

	[ "$VERBOSE" = no ] || log_action_begin_msg "Cleaning $dir"

	find . $findopts -delete \
		|| { report_err "$dir"; return 1 ; }
	[ "$VERBOSE" = no ] || log_action_end_msg 0
	mkflagfile "${dir}/.clean" || return 1
	log_progress_msg "$dir"
	return 0
}

clean_all()
{
	which find >/dev/null 2>&1 || return 0
	log_begin_msg "Cleaning up temporary files..."
	ES=0
	clean_tmp || ES=1
	clean /run "! -xtype d ! -name utmp ! -name innd.pid" || ES=1
	clean /run/lock "! -type d" || ES=1
	clean /run/shm "! -type d" || ES=1
	log_end_msg $ES
	return $ES
}