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Date: Fri, 23 Feb 2007 11:06:48 +0300 (MSK) From: "Mockern" <Mockern@...dex.ru> To: linux-kernel@...r.kernel.org Subject: cat reading problem Hello, I tried to cat < /dev/mytty/ttyS3, but cat shows nothing. I attached here strace cat < /dev/mytty/ttyS3 and cat < hello. Hello is just a file. As you can see the result of strace cat is identical, but in tty case I can't see nothing. Why does cat write nothing at my console? Thank you, ------------------------------------------------------------------------------------ root@...t:/home# strace cat < hello │c│c│c│c│c│c│c│c│c│c│c│c.. munmap(0x40017000, 5664) = 0 getuid32() = 0 getgid32() = 0 setgid32(0) = 0 setuid32(0) = 0 read(0, "Hello World!", 8192) = 12 write(1, "Hello World!", 12Hello World!) = 12 read(0, "", 8192) = 0 io_submit(0, 0x40200164, 0 <unfinished ... exit status 0> Process 1520 detached root@...t:/home# strace cat < /dev/mytty/ttyS3 │c│c│c│c│c│c│c│c│c│c│c│c│c. getuid32() = 0 getgid32() = 0 setgid32(0) = 0 setuid32(0) = 0 read(0, "\376\377\377f\377\330\0000", 8192) = 8 write(1, "\376\377\377f\377\330\0000", 8│║ f0) = 8 read(0, "", 8192) = 0 io_submit(0, 0x40200164, 0 <unfinished ... exit status 0> Process 1522 detached root@...t:/home# - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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