de-rpm.sh

来自「一本完整的描述Unix Shell 编程的工具书的所有范例」· Shell 代码 · 共 21 行

#!/bin/bash
# de-rpm.sh: Unpack an 'rpm' archive

: ${1?"Usage: `basename $0` target-file"}
# Must specify 'rpm' archive name as an argument.


TEMPFILE=$$.cpio                         # Tempfile with "unique" name.
                                         # $$ is process ID of script.

rpm2cpio < $1 > $TEMPFILE                # Converts rpm archive into cpio archive.
cpio --make-directories -F $TEMPFILE -i  # Unpacks cpio archive.
rm -f $TEMPFILE                          # Deletes cpio archive.

exit 0

#  Exercise:
#  Add check for whether 1) "target-file" exists and
#+                       2) it is really an rpm archive.
#  Hint:                    parse output of 'file' command.