Timeline for Getting the last argument passed to a shell script
Current License: CC BY-SA 3.0
14 events
| when toggle format | what | by | license | comment | |
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| Jan 13 at 18:33 | comment | added | midnite |
To my opinion this is the best and neat answer. But why you guys do not quote shift "${1}"?
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| Mar 7, 2023 at 18:18 | comment | added | Adam Katz |
@polynomial_donut – last() { shift $(($# - 1)) 2>/dev/null && printf %s "$1"; } will silently exit (with error code 1) if not given an argument
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| Feb 5, 2023 at 19:06 | comment | added | polynomial_donut | I'm getting "0" returned if there are no arguments passed, that should be considered | |
| Dec 2, 2020 at 13:20 | comment | added | Léa Gris | @MichałŠrajer i Think if you are the guy tasked to write scripts for that 40 years old legacy SCO Unix, you are likely to know your way with the man pages and printed manual because browsing stackoverflow with Mozaic is going to be quite challenging on its own. | |
| Dec 2, 2020 at 12:37 | comment | added | Michał Šrajer |
@LéaGris I believe you wound need to use expr instead of $(()) to make it work on all unix systems.
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| Nov 19, 2020 at 15:03 | comment | added | Léa Gris |
Alternatively: last() { shift $(($# - 1));printf %s "$1";}
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| Jan 10, 2018 at 18:20 | comment | added | joki |
@MichałŠrajer consider the case where "$1" is "-n" or "--", so for example ntharg 1 -n or ntharg 1 -- may yield different results on various systems. The code you have now is safe!
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| Jan 9, 2018 at 14:11 | comment | added | Michał Šrajer |
thanks @joki I worked with many different unix systems and I wouldn't trust echo -n either, however I am not aware on any posix system where echo "$1" would fail. Anyhow, printf is indeed more predictable - updated.
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| Jan 9, 2018 at 14:08 | history | edited | Michał Šrajer | CC BY-SA 3.0 |
updated as suggested in comment
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| Jan 4, 2018 at 9:37 | comment | added | joki |
This is a great idea, but I have a couple of suggestions: Firstly quoting should be added both around "$1" and "$#" (see this great answer unix.stackexchange.com/a/171347). Secondly, echo is sadly non-portable (particularly for -n), so printf '%s\n' "$1" should be used instead.
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| Oct 7, 2016 at 9:45 | comment | added | Ján Lalinský | Great answer - short, portable, safe. Thanks! | |
| Feb 20, 2013 at 8:46 | history | edited | Michał Šrajer | CC BY-SA 3.0 |
added 6 characters in body
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| Feb 1, 2013 at 16:47 | history | edited | Michał Šrajer | CC BY-SA 3.0 |
extended description
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| Feb 1, 2013 at 15:47 | history | answered | Michał Šrajer | CC BY-SA 3.0 |