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AW: mkcramfs under cygwin ??


thanks "CM" ,
but that doesn't seem to help

perhaps this is interesting:
only symlinks which point to different directories get garbled.


under cygwin:
Administrator@CELERON300A /tmp/netstation-0.8/pkg-tree/base
$ ls -al
total 36
drwxr-xr-x    9 Administ Kein         4096 Apr 26 22:42 .
drwxr-xr-x   67 Administ Kein        16384 Apr 26 22:43 ..
drwxr-xr-x    2 Administ Kein         8192 Apr 26 22:42 bin
drwxr-xr-x    2 Administ Kein            0 May 10  2002 dev
drwxr-xr-x    3 Administ Kein         4096 May 14  2002 etc
drwxr-xr-x    5 Administ Kein         4096 Apr 26 22:42 lib
lrwxrwxrwx    1 Administ Kein          102 Apr 26 22:42 linuxrc -> bin/busybox
drwxr-xr-x    2 Administ Kein            0 Nov 24  2000 proc
drwxr-xr-x    2 Administ Kein            0 Dec 12  2000 root
lrwxrwxrwx    1 Administ Kein           86 Apr 26 22:42 sbin -> bin
drwxr-xr-x    2 Administ Kein            0 Nov 25  2000 tmp
lrwxrwxrwx    1 Administ Kein           86 Apr 26 22:42 usr -> tmp
lrwxrwxrwx    1 Administ Kein           94 Apr 26 22:42 var -> tmp/var


this is the "base"-dir compressed with mkcramfs under windows, transferred to
linux and mounted there:

linux:/mnt # ls -al
drwxr-xr-x    1 vmware   bin           736 Apr 27 00:10 bin
drwxr-xr-x    1 vmware   bin            36 Apr 27 00:44 dev
drwxr-xr-x    1 vmware   bin           452 Apr  9 16:55 etc
drwxr-xr-x    1 vmware   bin           392 Apr 26 23:49 lib
lrwxrwxrwx    1 vmware   bin           102 Apr 27 00:44 linuxrc -> bin/busybox??
drwxr-xr-x    1 vmware   bin             0 Apr  9 17:11 proc
drwxr-xr-x    1 vmware   bin             0 Apr 27 00:44 root
lrwxrwxrwx    1 vmware   bin            86 Jan  1  1970 sbin ->
binaÐ??aà(??ø)???+??Ð,??è-??
drwxr-xr-x    1 vmware   bin             0 Apr 27 00:30 tmp
lrwxrwxrwx    1 vmware   bin            86 Apr 27 00:30 usr ->
tmpa Ý??n\tmp\netstation-0.8\pkg-tree\base\tmp\*
lrwxrwxrwx    1 vmware   bin            94 Apr 27 00:30 var -> tmp/vara

usr -> tmpa Ý??n\tmp\netstation-0.8\pkg-tree\base\tmp\*

interesting stuff - there are BACKSLASHES inside !!! Is this some
memory-fragment which got incorrectly
referenced when mkcramfs'sing the dir? (we know - f...n C and that pointer
stuff...) ;) ?


"simple" symlinks are just ok....
linux:/mnt/bin # ls -la
-rw-r--r--    1 vmware   bin         90736 Apr 27 00:45 ash
lrwxrwxrwx    1 vmware   bin            86 Apr 27 00:45 bash -> ash
-rw-r--r--    1 vmware   bin        102556 Apr 27 00:45 busybox
lrwxrwxrwx    1 vmware   bin            94 Apr 27 00:45 cat -> busybox
lrwxrwxrwx    1 vmware   bin            94 Jan  1  1970 clear -> busybox
lrwxrwxrwx    1 vmware   bin            94 Jan  1  1970 date -> busybox
-rw-r--r--    1 vmware   bin         32896 Jan  1  1970 dhcpcd
lrwxrwxrwx    1 vmware   bin            94 Jan  1  1970 echo -> busybox
lrwxrwxrwx    1 vmware   bin            94 Jan  1  1970 grep -> busybox
lrwxrwxrwx    1 vmware   bin            94 Jan  1  1970 gunzip -> busybox


any further hints how to get this "debugged" ?
regards
Roland


-----Ursprüngliche Nachricht-----
Von: CM [mailto:cmml@btinternet.com]
Gesendet: Sonntag, 26. Mai 2002 23:07
An: 'gmx'
Betreff: RE: mkcramfs under cygwin ??


I don’t know much about cygwin, but I would guess that this is because
of cygwin not supporting 64-bit fie io. You might want to try "typedef
long off_t;" instead of "long long".

CM

-----Original Message-----
From: cygwin-owner@cygwin.com [mailto:cygwin-owner@cygwin.com] On Behalf
Of gmx
Sent: 26 April 2002 21:59
To: cygwin@cygwin.com
Subject: mkcramfs under cygwin ??

CygWinners - hi again,

since i got no reply to my mkcramfs porting question (ok - mybe it's too
special
and i'm too impatiently - sorry),
i spend some time on trying it myself.
I was really wondering how far I git -  better said, it's nearly done!
:)

Beside of a little bug, it works basically - i can create compressed ram
filesystems under windows now.

I don`t really know, if i can expect being helped by this list - but i
think
this question is cygwin specific.
If i'm wrong here and I inconvenience you - sorry - please tell me
where/whom to
ask (maybe "alt.comp.programming.linux.rookies" or such ??)

The only thing i had to fix was to add "typedef long long int loff_t;"
to
mkcramfs.c because it's not defined in cygwin's types.h.
Surprisingly, it compiled successfully - just with some warnings.

But there is a bug inside: The created filesystem contains
"inconsistent"
symlink entries if i unpack them again with uncramfs on a
linux box - i.e. they are garbled.

linux:/tmp/testdir3/base # ls -la
insgesamt 7
drwxr-xr-x    9 vmware   bin           251 Apr 26 21:34 .
drwxr-xr-x   67 vmware   bin          1653 Apr 26 21:34 ..
drwxr-xr-x    2 vmware   bin           883 Apr 26 21:34 bin
drwxr-xr-x    2 vmware   bin            75 Apr 26 21:34 dev
drwxr-xr-x    3 vmware   bin           532 Apr 26 21:34 etc
drwxr-xr-x    5 vmware   bin           459 Apr 26 21:34 lib
lrwxrwxrwx    1 vmware   bin            13 Apr 26 21:34 linuxrc ->
bin/busybox??
drwxr-xr-x    2 vmware   bin            35 Apr 26 21:34 proc
drwxr-xr-x    2 vmware   bin            35 Apr 26 21:34 root
lrwxrwxrwx    1 vmware   bin            86 Apr 26 21:34 sbin ->
binaÐ??a(u??@v??Xw???y??0z??H{??`|??x}???~??¨???À???Ø???ð???????
???8???drwxr-xr-x    2 vmware   bin            35 Apr 26 21:34 tmp
lrwxrwxrwx    1 vmware   bin            49 Apr 26 21:34 usr ->
tmpaè??aee//base/tmp/ion-0.8\pkg-tree\base\root\8
lrwxrwxrwx    1 vmware   bin             8 Apr 26 21:34 var -> tmp/vara


I think this maybe a result of the compile warning
$ make
gcc -Wall -O3    mkcramfs.c  -lz -o mkcramfs
mkcramfs.c: In function `parse_directory':
mkcramfs.c:177: warning: passing arg 4 of `scandir' from incompatible
pointer
type
mkcramfs.c: In function `main':
mkcramfs.c:750: warning: int format, ssize_t arg (arg 2)
mkcramfs.c:757: warning: int format, ssize_t arg (arg 2)
mkcramfs.c:771: warning: int format, ssize_t arg (arg 4)
mkcramfs.c:781: warning: int format, ssize_t arg (arg 3)
mkcramfs.c:781: warning: int format, ssize_t arg (arg 4)

I think, the warnings for Lines 750 - 781 don't matter at all and can be
ignored, because it's just printf's/fprintf(stderr,....)'s

but what about this one :
mkcramfs.c:177: warning: passing arg 4 of `scandir' from incompatible
pointer
type
?????

Line 177 is:
/* read in the directory and sort */
dircount = scandir(name, &dirlist, 0, cramsort);

I searched for scandir and found the declaration - but I have no clue,
what this
means and how to interpret that.
Why does the error happen only with symlinks and not with normal files ?

sadly,I'm on war with pointers and all that stuff - last programming i
did was
shell and some java....
(hey, i'm systems administrator - not programmer ;)))

Could someone please(please!) point me to some docs or give me some
advice, how
to fix this problem ?
It will cost me weeks to find out, by myself, i think.....

cygwin:
int scandir (const char *__dir,
	     struct dirent ***__namelist,
	     int (*select) (const struct dirent *),
	     int (*compar) (const struct dirent **,const struct dirent
**));


i compared that to my linux box:

linux:
extern int scandir (__const char *__restrict __dir,
		    struct dirent ***__restrict __namelist,
		    int (*__selector) (__const struct dirent *),
		    int (*__cmp) (__const void *, __const void *))
__THROW;

looks a little bit different.....

Thanks in advance 4 helping and best regards
Roland

References:
mkcramfs & sources:
http://home.austarnet.com.au/paul1/vr/mkcramfs249.tar.gz
uncramfs & sources:
http://agenda.fatcathk.com/romdisk/uncramfs-0.6.tar.gz


AUTHOR 1: I hear if you play the NT 4.0 CD backwards, you get a Satanic
message.
AUTHOR 2: That's nothing. If you play it forward, it installs NT 4.0.


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