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lib/vsprintf: add %*pE[achnops] format specifier
This allows user to print a given buffer as an escaped string. The rules are applied according to an optional mix of flags provided by additional format letters. For example, if the given buffer is: 1b 62 20 5c 43 07 22 90 0d 5d The result strings would be: %*pE "\eb \C\a"\220\r]" %*pEhp "\x1bb \C\x07"\x90\x0d]" %*pEa "\e\142\040\\\103\a\042\220\r\135" Please, read Documentation/printk-formats.txt and lib/string_helpers.c kernel documentation to get further information. [[email protected]: tidy up comment layout, per Joe] Signed-off-by: Andy Shevchenko <[email protected]> Suggested-by: Joe Perches <[email protected]> Cc: "John W . Linville" <[email protected]> Cc: Johannes Berg <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
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