[#6282] hush: write errors in redirects write too much data(2010)

[#6282] hush: write errors in redirects write too much data

Submitted By: Martin Strubel

Open Date

2010-10-05 07:25:50

Priority:

Low Assignee:

Nobody

Status:

Open Fixed In Release:

N/A

Found In Release:

snaps Release:

trunk svn9843

Category:

Kernel Functions Board:

Custom

Processor:

ALL Silicon Revision:

Is this bug repeatable?:

Yes Resolution:

N/A

Uboot version or rev.:

Toolchain version or rev.:

trunk

App binary format:

N/A

Summary: hush: write errors in redirects write too much data

Details:

If a GPIO is exported from a script twice, like shown below, it obviously causes the wrong GPIO to be exported.

Reproduce:

/ # echo 11 >/sys/class/gpio/export ; ls /sys/class/gpio/

export gpio11 gpiochip0 unexport

/ # echo 11 >/sys/class/gpio/export ; ls /sys/class/gpio/

export gpio1 gpio11 gpiochip0 unexport

^^^^^

Follow-ups

--- Mike Frysinger 2010-10-06 02:52:13

not a GPIO bug. this is how the shell works when a redirected write fails.

simply strace it and you'll see that it writes too many bytes.

...

write(1, "11\n", 3) = -1 EBUSY (Device or

resource busy)

write(1, "1", 1) = 1

...

not that big of a deal. dont write incorrect shell scripts.

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