[Bug 1001466] /dev/null serial driver

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--- Comment #10 from Bernard Fouché <bernard.fouche@kuantic.com> 2012-02-16 16:25:43 GMT ---
(In reply to comment #9)
> (In reply to comment #6)
> 
> > Maybe the proper solution is in the stdio lib?
> 
> My check for eCos fopen("/dev/null", ...) from the box
> 
> The eCos template:
> 
>   cdl_configuration eCos {
>       template    default ;
>       package CYGPKG_IO_FILEIO current ;
>   };
> 
> Example of GDB session:
> 
>   % arm-eabi-gdb -q examples/hello
>   (gdb) target remote /dev/ttyUSB0
>   Remote debugging using /dev/ttyUSB0
>   0x00002d48 in ?? ()
>   (gdb) load
>   Loading section .rom_vectors, size 0x40 lma 0x81008000
>   Loading section .text, size 0x9714 lma 0x81008040
>   Loading section .rodata, size 0x344 lma 0x81011754
>   Loading section .data, size 0x484 lma 0x81011a98
>   Start address 0x81008040, load size 40732
>   Transfer rate: 3 KB/sec, 299 bytes/write.
>   (gdb) b main
>   Breakpoint 1 at 0x81008534: file hello.c, line 7.
>   (gdb) b exit
>   Breakpoint 2 at 0x81010ad0: file
> /home/sg/repo/ecos-hg/packages/language/c/libc/startup/current/src/exit.cxx,
> line 74.
>   (gdb) cont
>   Continuing.
>   [New Thread 2]
>   [Switching to Thread 2]
> 
>   Breakpoint 1, main () at hello.c:7
>   7        FILE           *fh = fopen("/dev/null", "r+");
>   (gdb) l
>   2    #include <stdlib.h>
>   3    
>   4    int
>   5    main(void)
>   6    {
>   7        FILE           *fh = fopen("/dev/null", "r+");
>   8        fprintf(stdout, "Hello, eCos world! (at stdout)\n");
>   9        fprintf(fh, "Hello, eCos world! (at /dev/null)\n");
>   10        fclose(fh);
>   11        fprintf(stdout, "Bye! (at stdout)\n");
>   (gdb) cont
>   Continuing.
>   Hello, eCos world! (at stdout)
>   Bye! (at stdout)
> 
>   Breakpoint 2, exit (status=0)
>       at
> /home/sg/repo/ecos-hg/packages/language/c/libc/startup/current/src/exit.cxx:74
>   74    exit( int status )
>   Current language:  auto; currently c++
>   (gdb) 
> 
> And what you get?

Excellent! Just need some documentation and then /dev/null can go to itself ;-)

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