Fix: lttng UST and kernel consumer: fix ret vs errno mixup
authorMathieu Desnoyers <mathieu.desnoyers@efficios.com>
Fri, 24 Feb 2012 19:41:49 +0000 (14:41 -0500)
committerMathieu Desnoyers <mathieu.desnoyers@efficios.com>
Fri, 24 Feb 2012 19:41:49 +0000 (14:41 -0500)
- errno should be set to -ret (not the opposite!)
  The main effect is that the perror errors were meaningless.

- errno should always be compared with positive values.
  This was also causing consumerd error handling mistakes.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

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