Hello,
getcwd() seems also buggy on an external FAT12 image. On 4.11 there is no crash but this behavior:
RAM disks registered
disk addr 1: 0x400c6fa0, size: 1000000
disk addr 2: 0x40074060, size: 262144
format /dev/rda done.
mount return: 0
mount return: 0
Starting 1 threads...
started thread 0: id: 0x0b010002, prio: 10
=========================
starting shell
=========================
RTEMS SHELL (Ver.1.0-FRC):/dev/console. Oct 14 2014. 'help' to list commands.
[/] #
[/] #
[/] #
[/] # pwd
/
[/] # ls
dev mram sdram
[/] # cdhello dude, this is tick nr: 0
[/] # cd mram
hello dude, this is tick nr: 1
[/mram] # cd template
[/mram/template] # pwd
/mram/template
[/mram/template] # ls
logs param
[/mram/template] #
[/mram/template] # cd logs
hello dude, this is tick nr: 0
RAM disks registered
disk addr 1: 0x400c6fa0, size: 1000000
disk addr 2: 0x40074060, size: 262144
format /dev/rda done.
mount return: 0
mount return: 0
Starting 1 threads...
started thread 0: id: 0x0b010002, prio: 10
=========================
starting shell
=========================
RTEMS SHELL (Ver.1.0-FRC):/dev/console. Oct 14 2014. 'help' to list commands.
[/] #
[/] #
[/] #
[/] # pwd
/
[/] # ls
dev mram sdram
[/] # cd mram
[/mram] # cd template
[/mram/template] # pwd
/mram/template
[/mram/template] # ls
logs param
[/mram/template] #
[/mram/template] # cd logs
[?] # pwd
ￜ
I'll be happy to forward the test case to an rtems developer.
This behavior occurs only when mounting an external fat12 image generated this way:
NAME = libfatfsimg
BUILDDIR = build
all: $(NAME).a
.PHONY: $(NAME).a
$(NAME).o:
@echo [GEN FATFS] $@
@dd if=/dev/zero of=$(NAME) bs=256 count=1024 > /dev/null
/sbin/mkfs.vfat -F 12 -S 512 -s 1 -r 512 -f 1 -v $(NAME)
mcopy -b/ -i $(NAME) content/* ::/
@xxd -i $(NAME) > $(NAME).c
@echo [CC] $@
@$(CC) -c $(CFLAGS) -o $@ $(NAME).c
$(NAME).a: $(NAME).o
@$(AR) rcs $@ $^
The object file is then linked against the rtems test application.
Marco
________________________________
From: users [mailto:users-bounces-***@public.gmane.org] On Behalf Of Rohner Thomas
Sent: Donnerstag, 2. Oktober 2014 12:11
To: Joel Sherrill; rtems-users-***@public.gmane.org
Subject: RE: Bug in getcwd()
Hello,
We have a system with the following configuration.
·Chip GR712RC
·Board: GR712 Development Board
·Compiler RTEMS RCC (according to your websites version)
·RTOS: RTEMS
·Library: GR-RTEMS-DRIVER Version 1.2.1.0
I'm using FAT as filesystem. We have same phenomenon for FAT12 or FAT16!
Freundliche Grüsse / Kind regards,
Thomas Rohner
Entwicklungsingenieur Software
nanoTRONIC GmbH
Werkstrasse 27, CH - 3250 Lyss
T: +41 32 384 69 30, F: +41 32 384 69 31
www.nanotronic.ch <http://www.nanotronic.ch/> | thomas.rohner-3eeWUiZ0u1f/***@public.gmane.org
From: Joel Sherrill [mailto:joel.sherrill-lGxtRh3/***@public.gmane.org]
Sent: Mittwoch, 1. Oktober 2014 20:11
To: Rohner Thomas; rtems-users-***@public.gmane.org
Subject: Re: Bug in getcwd()
On 10/1/2014 9:26 AM, Rohner Thomas wrote:
Hello,
maybe I found a bug in getcwd().
We're using RTEMS 4.0 with Gaisler-Aeroflex....
With our libraries I get an erroneous string when directory-depth is about 4 folders from root!
When I use this string to read directory it crahes!
Is there a limitation of string-length?
I get the same results for
Char buffer[200];
getcwd(buffer,sizeof(buffer));
or
char* ret = getcwd(NULL,0);
Is this with the IMFS? What BSP?
Can you put together a full test example so we can
see what is really happening?
There is a POSIX constant for PATH_MAX as I recall but
it is quite large.
Freundliche Grüsse / Kind regards,
Thomas Rohner
Entwicklungsingenieur Software
nanoTRONIC GmbH
Werkstrasse 27, CH - 3250 Lyss
T: +41 32 384 69 30, F: +41 32 384 69 31
www.nanotronic.ch <http://www.nanotronic.ch/> | thomas.rohner-3eeWUiZ0u1f/***@public.gmane.org
--
Joel Sherrill, Ph.D. Director of Research & Development
joel.sherrill-***@public.gmane.org On-Line Applications Research
Ask me about RTEMS: a free RTOS Huntsville AL 35805
Support Available (256) 722-9985