shell编程的问题请教。
#!/bin/sh# $XConsortium: startx.cpp,v 1.4 91/08/22 11:41:29 rws Exp $
# $XFree86: xc/programs/xinit/startx.cpp,v 3.2 1998/12/20 11:58:22 dawes Exp $
#
# This is just a sample implementation of a slightly less primitive
# interface than xinit. It looks for user .xinitrc and .xserverrc
# files, then system xinitrc and xserverrc files, else lets xinit choose
# its default. The system xinitrc should probably do things like check
# for .Xresources files and merge them in, startup up a window manager,
# and pop a clock and serveral xterms.
#
# Site administrators are STRONGLY urged to write nicer versions.
#
userclientrc=$HOME/.xinitrc
userserverrc=$HOME/.xserverrc
sysclientrc=/usr/X11R6/lib/X11/xinit/xinitrc
sysserverrc=/usr/X11R6/lib/X11/xinit/xserverrc
clientargs=""
serverargs="-s 0"
if [ -f $userclientrc ]; then
clientargs=$userclientrc
else if [ -f $sysclientrc ]; then
clientargs=$sysclientrc
fi
fi
if [ -f $userserverrc ]; then
serverargs=$userserverrc
else if [ -f $sysserverrc ]; then
serverargs=$sysserverrc
fi
fi
whoseargs="client"
while [ "x$1" != "x" ]; do #x$1表示什么参数？？
case "$1" in
/''*|\.*) if [ "$whoseargs" = "client" ]; then #/‘，，和\.*表示什么文件类型？？
if [ "x$clientargs" = x ]; then
clientargs="$1"
else
clientargs="$clientargs $1"
fi
else
if [ "x$serverargs" = x ]; then
serverargs="$1"
else
serverargs="$serverargs $1"
fi
fi ;;
--) whoseargs="server" ;; --）表示什么意思？？？
*) if [ "$whoseargs" = "client" ]; then
clientargs="$clientargs $1"
else
serverargs="$serverargs $1"
fi ;;
esac
shift
done
xinit $clientargs -- $serverargs 1). $1表示传给脚本的第一个参数.
2). \.*表示当前目录以及上一级目录
3). --表示option flag,即脚本参数--
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