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tracing/fastboot: put error message on stderr

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Since this scripts output is usually redirected, put error messages
on standard error and exit with error code if no data is found.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Stephen Hemminger 2008-11-13 08:33:00 -08:00 committed by Ingo Molnar
parent 24de38620d
commit d1aaf8cf8a
1 changed files with 7 additions and 5 deletions
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12
scripts/bootgraph.pl
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@ -78,11 +78,13 @@ while (<>) {
} }
if ($count == 0) { if ($count == 0) {
print "No data found in the dmesg. Make sure that 'printk.time=1' and\n"; print STDERR <<END;
print "'initcall_debug' are passed on the kernel command line.\n\n"; No data found in the dmesg. Make sure that 'printk.time=1' and
print "Usage: \n"; 'initcall_debug' are passed on the kernel command line.
print " dmesg | perl scripts/bootgraph.pl > output.svg\n\n"; Usage:
exit; dmesg | perl scripts/bootgraph.pl > output.svg
END
exit 1;
} }
print "<?xml version=\"1.0\" standalone=\"no\"?> \n"; print "<?xml version=\"1.0\" standalone=\"no\"?> \n";