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Topic: Cond statements, BASH

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mikshaw

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Posted: Sep. 09 2007,02:56

I think there's something screwy with your bash.

Are you using #!/bin/sh as an interpreter instead of #!/bin/bash? I've read that Bash behaves differently if it's called as sh

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jpeters

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Posted: Sep. 09 2007,03:18

Quote (mikshaw @ Sep. 08 2007,22:56)

I think there's something screwy with your bash.

Are you using #!/bin/sh as an interpreter instead of #!/bin/bash? I've read that Bash behaves differently if it's called as sh

Same result using /bin/sh (as /bin/bash). I've tried it on two computers with the same results.

EDIT: I just compiled BASH 3.2, and got the same results! Now I'm really baffled.

EDIT2: Okay; got it working. Problem was that there needs to be a space before and after the brackets: if [ 3 -eq 3 ]
(I put in several, just to make sure...it's hard to see single spaces in print )

mikshaw

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Posted: Sep. 09 2007,13:43

"[" is a command, just as "test" is a command. If you think about it that way it might not even occur to you to _not_ include the spaces. After all, you wouldn't use the test command this way: if test23 == 23

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curaga

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Posted: Sep. 09 2007,15:14

actually [ is an alias for test..

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^thehatsrule^ Offline

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Posted: Sep. 09 2007,15:39

If you really want to be technical, I think [ and test are separate binaries (different invokes I suppose - though I guess busybox would have all symlinks directing back to it)

Quote

(I put in several, just to make sure...it's hard to see single spaces in print )

I like to have an electronic source as well for learning things like this, due to an easy copy and paste, or zoom.

15 replies since Sep. 08 2007,19:00

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Damn Small Linux Board » Damn Small Linux » Other Help Topics » Cond statements, BASH