mirror of https://github.com/tLDP/LDP
28 lines
706 B
Bash
28 lines
706 B
Bash
#!/bin/bash
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# shft.sh: Using 'shift' to step through all the positional parameters.
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# Name this script something like shft.sh,
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#+ and invoke it with some parameters.
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#+ For example:
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# sh shft.sh a b c def 83 barndoor
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until [ -z "$1" ] # Until all parameters used up . . .
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do
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echo -n "$1 "
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shift
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done
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echo # Extra linefeed.
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# But, what happens to the "used-up" parameters?
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echo "$2"
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# Nothing echoes!
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# When $2 shifts into $1 (and there is no $3 to shift into $2)
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#+ then $2 remains empty.
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# So, it is not a parameter *copy*, but a *move*.
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exit
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# See also the echo-params.sh script for a "shiftless"
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#+ alternative method of stepping through the positional params.
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