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Kernel and Embedded Linux
Bootlin training courses
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strchr("fooeyfooeyfoo", 'f') = "fooeyfooeyfoo" strrchr("fooeyfooeyfoo", 'f') = "foo" strchr("fooeyfooeyfoo", 'y') = "yfooeyfoo" strrchr("fooeyfooeyfoo", 'y') = "yfoo" strrchr("yfooeyfoo", 'y') = "yfoo"