6a4fc7e052
The content of this branch was automatically imported from Fedora ELN with the following as its source: https://src.fedoraproject.org/rpms/kernel#351b480089e439ed4f8da85787b1b002d1b53a62
27 lines
731 B
Bash
Executable File
27 lines
731 B
Bash
Executable File
#!/bin/sh
|
|
# Reads filenames on stdin, xz-compresses each in place.
|
|
# Not optimal for "compress relatively few, large files" scenario!
|
|
|
|
# How many xz's to run in parallel:
|
|
procgroup=""
|
|
while test "$#" != 0; do
|
|
# Get it from -jNUM
|
|
N="${1#-j}"
|
|
if test "$N" = "$1"; then
|
|
# Not -j<something> - warn and ignore
|
|
echo "parallel_xz: warning: unrecognized argument: '$1'"
|
|
else
|
|
procgroup="$N"
|
|
fi
|
|
shift
|
|
done
|
|
|
|
# If told to use only one cpu:
|
|
test "$procgroup" || exec xargs -r xz
|
|
test "$procgroup" = 1 && exec xargs -r xz
|
|
|
|
# xz has some startup cost. If files are really small,
|
|
# this cost might be significant. To combat this,
|
|
# process several files (in sequence) by each xz process via -n 16:
|
|
exec xargs -r -n 16 -P $procgroup xz
|