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Impact: - More verbose help/usage message. - Make the option -f an alias for --file. - On -h, --help, and --version display help message and exit(0). - With no FILE(s) given, exit(1) with "no input files". - On invalid options display help/usage and exit(1). Based on a patch by Pavel Machek. Signed-off-by: Hannes Eder <hannes@hanneseder.net> Acked-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Andy Whitcroft <apw@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>