udev: rules ignore whitespace but not case

Eric C. Cooper

author

2004-11-15 20:40 UTC #0 lore raw

I use a rule like this

    BUS="scsi", SYSFS{model}="iPod", KERNEL="sd[a-z]2", SYMLINK="ipod"

and it works even though the model field is actually
"iPod "

But a rule like this

    BUS="scsi", SYSFS{vendor}="KINGSTON", KERNEL="sd[a-z]1", SYMLINK="flash"

fails with my flash disk because the vendor field is actually "Kingston".

I think that if the pattern matching is going to trim whitespace, it should also ignore case. That would be more consistent and more resilient to errors.

Signature · 12 lines

Eric C. Cooper          e c c @ c m u . e d u


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Kay Sievers

2004-11-15 20:51 UTC #1 lore raw

Quoted 5 lines · Eric C. Cooper

I use a rule like this
    BUS="scsi", SYSFS{model}="iPod", KERNEL="sd[a-z]2", SYMLINK="ipod"
and it works even though the model field is actually
"iPod "

Quoted 7 lines

But a rule like this
    BUS="scsi", SYSFS{vendor}="KINGSTON", KERNEL="sd[a-z]1", SYMLINK="flash"
fails with my flash disk because the vendor field is actually "Kingston".
I think that if the pattern matching is going to trim whitespace, it should also ignore case. That would be more consistent and more resilient to errors.

That's on purpose. The whitespace is ignored only if your key value does not end with whitespace. So it's still possible to distinguish fields with differences only in the whitespace.

Thanks,
Kay

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Greg KH

2004-11-15 21:12 UTC #2 lore raw

In reply to Eric C. Cooper

Quoted 5 lines · Eric C. Cooper

I use a rule like this
    BUS="scsi", SYSFS{model}="iPod", KERNEL="sd[a-z]2", SYMLINK="ipod"
and it works even though the model field is actually
"iPod "

Quoted 7 lines

But a rule like this
    BUS="scsi", SYSFS{vendor}="KINGSTON", KERNEL="sd[a-z]1", SYMLINK="flash"
fails with my flash disk because the vendor field is actually "Kingston".
I think that if the pattern matching is going to trim whitespace, it should also ignore case. That would be more consistent and more resilient to errors.

No, we want to only trim whitespace, as that's the most common issue for people. Case sensitivity is still important to keep.

thanks,

greg k-h

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