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|
#! /bin/sh
#
# descend - walk down a directory tree and execute a command at each node
fullname=$0
name=descend
usage="Usage: $name [-afqrv] command [directory ...]\n
\040\040-a\040\040All: descend into directories starting with '.'\n
\040\040-f\040\040Force: ignore errors during descent\n
\040\040-q\040\040Quiet: don't print directory names\n
\040\040-r\040\040Restricted: don't descend into RCS, CVS.adm, SCCS directories\n
\040\040-v\040\040Verbose: print command before executing it"
# Scan for options
while getopts afqrv option; do
case $option in
a)
alldirs=$option
options=$options" "-$option
;;
f)
force=$option
options=$options" "-$option
;;
q)
verbose=
quiet=$option
options=$options" "-$option
;;
r)
restricted=$option
options=$options" "-$option
;;
v)
verbose=$option
quiet=
options=$options" "-$option
;;
\?)
/usr/5bin/echo $usage 1>&2
exit 1
;;
esac
done
shift `expr $OPTIND - 1`
# Get command to execute
if [ $# -lt 1 ] ; then
/usr/5bin/echo $usage 1>&2
exit 1
else
command=$1
shift
fi
# If no directory specified, use '.'
if [ $# -lt 1 ] ; then
default_dir=.
fi
# For each directory specified
for dir in $default_dir "$@" ; do
# Spawn sub-shell so we return to starting directory afterward
(cd $dir
# Execute specified command
if [ -z "$quiet" ] ; then
echo In directory `hostname`:`pwd`
fi
if [ -n "$verbose" ] ; then
echo $command
fi
eval "$command" || if [ -z "$force" ] ; then exit 1; fi
# Collect dot file names if necessary
if [ -n "$alldirs" ] ; then
dotfiles=.*
else
dotfiles=
fi
# For each file in current directory
for file in $dotfiles * ; do
# Skip '.' and '..'
if [ "$file" = "." -o "$file" = ".." ] ; then
continue
fi
# If a directory but not a symbolic link
if [ -d "$file" -a ! -h "$file" ] ; then
# If not skipping this type of directory
if [ \( "$file" != "RCS" -a \
"$file" != "SCCS" -a \
"$file" != "CVS" -a \
"$file" != "CVS.adm" \) \
-o -z "$restricted" ] ; then
# Recursively descend into it
$fullname $options "$command" "$file" \
|| if [ -z "$force" ] ; then exit 1; fi
fi
# Else if a directory AND a symbolic link
elif [ -d "$file" -a -h "$file" ] ; then
if [ -z "$quiet" ] ; then
echo In directory `hostname`:`pwd`/$file: symbolic link: skipping
fi
fi
done
) || if [ -z "$force" ] ; then exit 1; fi
done
|
