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Revision 989b697d

ID989b697ddd46769b0999e8cd16b5ecd393204734

Added by Peter Maydell about 11 years ago

qemu-log: default to stderr for logging output

Switch the default for qemu_log logging output from "/tmp/qemu.log"
to stderr. This is an incompatible change in some sense, but logging
is mostly used for debugging purposes so it shouldn't affect production
use. The previous behaviour can be obtained by adding "-D /tmp/qemu.log"
to the command line.

This change requires us to: * update all the documentation/help text (we take the opportunity
to smooth out minor inconsistencies between the phrasing in
linux-user/bsd-user/system help messages) * make linux-user and bsd-user defer to qemu-log for the default
logging destination rather than overriding it themselves * ensure that all logfile closing is done via qemu_log_close()
and that that function doesn't close stderr
as well as the obvious change to the behaviour of do_qemu_set_log()
when no logfile name has been specified.

Signed-off-by: Peter Maydell <>
Reviewed-by: Stefan Hajnoczi <>
Reviewed-by: Markus Armbruster <>
Message-id:
Signed-off-by: Anthony Liguori <>

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