JezK
Edit File: tmpfs.sh
# # Set tmpfs vars # # Get size of physical RAM in kiB ram_size () { [ -r /proc/meminfo ] && \ grep MemTotal /proc/meminfo | \ sed -e 's;.*[[:space:]]\([0-9][0-9]*\)[[:space:]]kB.*;\1;' || : } # Get size of swap space in kiB swap_size () { [ -r /proc/meminfo ] && \ grep SwapTotal /proc/meminfo | \ sed -e 's;.*[[:space:]]\([0-9][0-9]*\)[[:space:]]kB.*;\1;' || : } # # Get total VM size in kiB. Prints nothing if no RAM and/or swap was # detectable. # vm_size () { RAM=$(ram_size) SWAP=$(swap_size) RAM="${RAM:=0}" SWAP="${SWAP:=0}" echo $((RAM + SWAP)) return 0; } # # Get size of tmpfs. If the size is absolute or a percentage, return # that unchanged. If suffixed with "%VM", return the absolute size as # a percentage of RAM and swap combined. If no swap was available, # return as a percentage (tmpfs will use a percentage of RAM only). # tmpfs_size_vm () { # Handle the no-swap case here, i.e. core memory only. Also handle no # memory either (no proc) by just returning the original value. RET="$1" VMTOTAL="$(vm_size)" VMPCT="${RET%\%VM}" if [ "$VMPCT" != "$RET" ]; then if [ -n "$VMTOTAL" ]; then RET=$(((VMTOTAL / 100) * VMPCT)) RET="${RET}k" else RET="${VMPCT}%" fi fi echo "$RET" } # Free space on /tmp in kiB. tmp_free_space () { LC_ALL=C df -kP /tmp | grep -v Filesystem | sed -e 's;^[^[:space:]][^[:space:]]*[[:space:]][[:space:]]*[0-9][0-9]*[[:space:]][[:space:]]*[0-9][0-9]*[[:space:]][[:space:]]*\([0-9][0-9]*\)[[:space:]][[:space:]]*.*$;\1;' } # Check if an emergency tmpfs is needed need_overflow_tmp () { [ "$VERBOSE" != no ] && log_action_begin_msg "Checking minimum space in /tmp" ROOT_FREE_SPACE=$(tmp_free_space) [ "$VERBOSE" != no ] && log_action_end_msg 0 if [ -n "$ROOT_FREE_SPACE" ] && [ -n "$TMP_OVERFLOW_LIMIT" ] \ && [ $((ROOT_FREE_SPACE < TMP_OVERFLOW_LIMIT)) = "1" ]; then return 0 fi return 1 } # Set defaults for /etc/default/tmpfs, in case any options are # commented out which are needed for booting. So that an empty or # outdated file missing newer options works correctly, set the default # values here. RAMLOCK=yes # These might be overridden by /etc/default/rcS if test -z "${RAMSHM}" ; then # tmpfs can not be used for shm yet, see #923078 case "$(uname -s)" in (GNU) RAMSHM=no ;; (*) RAMSHM=yes ;; esac fi if [ -z "$RAMTMP" ]; then RAMTMP=no; fi TMPFS_SIZE=20%VM TMPFS_MODE=755 RUN_SIZE=10% RUN_MODE=755 LOCK_SIZE=5242880 # 5MiB LOCK_MODE=1777 SHM_SIZE= SHM_MODE=1777 TMP_SIZE= TMP_MODE=1777 TMP_OVERFLOW_LIMIT=1024 # Source conffile if [ -f /etc/default/tmpfs ]; then . /etc/default/tmpfs fi TMPFS_SIZE="$(tmpfs_size_vm "$TMPFS_SIZE")" RUN_SIZE="$(tmpfs_size_vm "$RUN_SIZE")" LOCK_SIZE="$(tmpfs_size_vm "$LOCK_SIZE")" SHM_SIZE="$(tmpfs_size_vm "$SHM_SIZE")" TMP_SIZE="$(tmpfs_size_vm "$TMP_SIZE")" RUN_OPT= [ "${RUN_SIZE:=$TMPFS_SIZE}" ] && RUN_OPT=",size=$RUN_SIZE" [ "${RUN_MODE:=$TMPFS_MODE}" ] && RUN_OPT="$RUN_OPT,mode=$RUN_MODE" LOCK_OPT= [ "${LOCK_SIZE:=$TMPFS_SIZE}" ] && LOCK_OPT=",size=$LOCK_SIZE" [ "${LOCK_MODE:=$TMPFS_MODE}" ] && LOCK_OPT="$LOCK_OPT,mode=$LOCK_MODE" SHM_OPT= [ "${SHM_SIZE:=$TMPFS_SIZE}" ] && SHM_OPT=",size=$SHM_SIZE" [ "${SHM_MODE:=$TMPFS_MODE}" ] && SHM_OPT="$SHM_OPT,mode=$SHM_MODE" TMP_OPT= [ "${TMP_SIZE:=$TMPFS_SIZE}" ] && TMP_OPT=",size=$TMP_SIZE" [ "${TMP_MODE:=$TMPFS_MODE}" ] && TMP_OPT="$TMP_OPT,mode=$TMP_MODE"