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[Bug 1001466] /dev/null serial driver
- From: bugzilla-daemon at bugs dot ecos dot sourceware dot org
- To: ecos-patches at ecos dot sourceware dot org
- Date: Thu, 16 Feb 2012 16:25:46 +0000
- Subject: [Bug 1001466] /dev/null serial driver
- Auto-submitted: auto-generated
- References: <bug-1001466-104@http.bugs.ecos.sourceware.org/>
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--- Comment #10 from Bernard Fouchà <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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