mirror of
https://github.com/percona/percona-toolkit.git
synced 2025-09-11 21:51:21 +00:00
75 lines
2.5 KiB
Bash
75 lines
2.5 KiB
Bash
# This program is copyright 2011 Percona Inc.
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# Feedback and improvements are welcome.
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#
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# THIS PROGRAM IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
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# WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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# MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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#
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# This program is free software; you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free Software
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# Foundation, version 2; OR the Perl Artistic License. On UNIX and similar
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# systems, you can issue `man perlgpl' or `man perlartistic' to read these
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# licenses.
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#
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# You should have received a copy of the GNU General Public License along with
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# this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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# Place, Suite 330, Boston, MA 02111-1307 USA.
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# ###########################################################################
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# safeguards package
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# ###########################################################################
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# Package: safeguards
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# safeguards is a collection of function to help avoid blowing things up.
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set -u
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disk_space() {
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local filesystem=${1:-"$PWD"}
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# Filesystem 1M-blocks Used Available Capacity Mounted on
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# /dev/disk0s2 115383 92637 22496 81% /
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df -m $filesystem
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}
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# Sub: check_disk_space
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# Check if there is or will be enough disk space.
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#
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# Arguments:
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# file - File with output from <disk_space()>.
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# mb - Minimum MB free.
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# pc - Minimum percent free.
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# margin - Add this many MB to the real MB used.
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#
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# Returns:
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# 0 if there is/will be enough disk space, else 1.
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check_disk_space() {
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local file=$1
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local mb=${2:-"0"}
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local pc=${3:-"0"}
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local margin=${4:-"0"}
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local mb_used=$(cat $file | awk '/^\//{print $3}');
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local mb_free=$(cat $file | awk '/^\//{print $4}');
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local pc_used=$(cat $file | awk '/^\//{print $5}' | sed -e 's/%//g');
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if [ "$margin" -gt "0" ]; then
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local mb_total=$(($mb_used + $mb_free))
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mb_used=$(($mb_used + $margin))
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mb_free=$(($mb_free - $margin))
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pc_used=$(awk "BEGIN { printf(\"%d\", $mb_used/$mb_total * 100) }")
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fi
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local pc_free=$((100 - $pc_used))
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if [ "$mb_free" -le "$mb" -o "$pc_free" -le "$pc" ]; then
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warn "Not enough free disk space: ${pc_free}% free, ${mb_free} MB free; wanted more than ${pc}% free or ${mb} MB free"
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return 1
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fi
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return 0
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}
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# ###########################################################################
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# End safeguards package
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# ###########################################################################
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