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functionname()
{
# inside the body $1 is the first argument given to the function
# $2 the second ...
body
}
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ÕâÀïʹÓÃÁËÒ»¸ö½Ð×öhelpµÄº¯Êý¡£ÕýÈçÄú¿ÉÒÔ¿´µ½µÄÄÇÑù£¬Õâ¸ö¶¨ÒåµÄº¯Êý±»Ê¹ÓÃÁËÁ½´Î¡£
#!/bin/sh
# vim: set sw=4 ts=4 et:
help()
{
cat <
xtitlebar -- change the name of an xterm, gnome-terminal or kde konsole
USAGE: xtitlebar [-h] "string_for_titelbar"
OPTIONS: -h help text
EXAMPLE: xtitlebar "cvs"
HELP
exit 0
}
# in case of error or if -h is given we call the function help:
[ -z "$1" ] && help
[ "$1" = "-h" ] && help
# send the escape sequence to change the xterm titelbar:
echo -e "33]0;$107"
#
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ÃüÁîÐвÎÊý
ÎÒÃÇÒѾ­¼û¹ý$* ºÍ $1, $2 ... $9 µÈÌØÊâ±äÁ¿£¬ÕâÐ©ÌØÊâ±äÁ¿°üº¬ÁËÓû§´ÓÃüÁîÐÐÊäÈëµÄ²ÎÊý¡£Æù½ñΪֹ£¬ÎÒÃǽö½öÁ˽âÁËһЩ¼òµ¥µÄÃüÁîÐÐÓï·¨£¨±ÈÈçÒ»Ð©Ç¿ÖÆÐԵIJÎÊýºÍ²é¿´°ïÖúµÄ-hÑ¡Ï¡£µ«ÊÇÔÚ±àд¸ü¸´ÔӵijÌÐòʱ£¬Äú¿ÉÄܻᷢÏÖÄúÐèÒª¸ü¶àµÄ×Ô¶¨ÒåµÄÑ¡Ïͨ³£µÄ¹ßÀýÊÇÔÚËùÓпÉÑ¡µÄ²ÎÊý֮ǰ¼ÓÒ»¸ö¼õºÅ£¬ºóÃæÔÙ¼ÓÉϲÎÊýÖµ (±ÈÈçÎļþÃû)¡£Óкö෽·¨¿ÉÒÔʵÏÖ¶ÔÊäÈë²ÎÊýµÄ·ÖÎö£¬µ«ÊÇÏÂÃæµÄʹÓÃcase±í´ïʽµÄÀý×ÓÎÞÒÅÊÇÒ»¸ö²»´íµÄ·½·¨¡£
#!/bin/sh
help()
{
cat <
This is a generic command line parser demo.
USAGE EXAMPLE: cmdparser -l hello -f -- -somefile1 somefile2
HELP
exit 0
}
while [ -n "$1" ]; do
case $1 in
-h) help;shift 1;; # function help is called
-f) opt_f=1;shift 1;; # variable opt_f is set
-l) opt_l=$2;shift 2;; # -l takes an argument -> shift by 2
--) shift;break;; # end of options
-*) echo "error: no such option $1. -h for help";exit 1;;
*) break;;
esac
done
echo "opt_f is $opt_f"
echo "opt_l is $opt_l"
echo "first arg is $1"


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