44 lines
1.2 KiB
Bash
44 lines
1.2 KiB
Bash
#!/bin/zsh
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# vim:ft=zsh
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local ALPHA_SET='A-Za-z'
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local NUMERIC_SET='0-9'
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local SYM_SET='!@#$%^&*'
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local XSYM_SET="${SYM_SET}.;:-+="
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local ALNUM_SET="${ALPHA_SET}${NUMERIC_SET}"
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local ALL_SET="${ALNUM_SET}${SYM_SET}"
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local XALL_SET="${ALNUM_SET}${XSYM_SET}"
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local -i length=16 count=1
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local charset="$ALL_SET"
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while getopts 'c:l:s:' opt; do
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case $opt in
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c) count=$OPTARG;;
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l) length=$OPTARG;;
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s) case $OPTARG in
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alpha) charset="$ALPHA_SET";;
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num) charset="$NUMERIC_SET";;
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alnum) charset="$ALNUM_SET";;
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sym) charset="$SYM_SET";;
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xsym) charset="$XSYM_SET";;
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all) charset="$ALL_SET";;
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xall) charset="$XALL_SET";;
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*) echo "Invalid set name: $OPTARG" 1>&2; return -2;;
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esac
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;;
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*) echo "Invalid argument: $opt" 1>&2; return -1;;
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esac
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done
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local cmd='tr -dc "$charset" < /dev/urandom | fold -w $length | head -n $count'
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if [[ $SYS == 'darwin' ]]; then
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# The way OS X >=10.6 handles unicode characters causes tr to fail with an
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# 'Illegal byte sequence' error. Setting the locale here fixes that.
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#
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# See: http://nerdbynature.de/s9y/?176
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cmd="LC_CTYPE=C $cmd"
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fi
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eval "$cmd"
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