openSUSE Programming November 2006

programming@lists.opensuse.org

7 participants
9 discussions

by Oliver Block

Hello, I was facing a problem with a functio I wrote, checking if a file exists withing the fs. When I was debuggin that , I set 2 breakpoints, the first to the function file_exists and the second to the function call of file_exists inside the program. I got the following output **************************** gdb ************************************ Breakpoint 2, main (argc=1, argv=0xbffff1c4) at ddnscli.c:712 712 if(file_exists(lockfile)) (gdb) s Breakpoint 1, file_exists (fname=0xbffff110 "disabled") at ddnscli.c:689 689 if( (rval = stat( fname, &attribut)) == -1) (gdb) s __stat (file=0xbffff070 "\200", buf=0xbffff070) at stat.c:51 51 stat.c: Datei oder Verzeichnis nicht gefunden. in stat.c (gdb) bt full #0 __stat (file=0xbffff070 "\200", buf=0xbffff070) at stat.c:51 No locals. #1 0x0804a56b in file_exists (fname=0xbffff110 "disabled") at ddnscli.c:689 attribut = {st_dev = 128, __pad1 = 34760, st_ino = 7, st_mode = 53, st_nlink = 1075277812, st_uid = 1075283840, st_gid = 134522768, st_rdev = 4615200421588234412, __pad2 = 34688, st_size = 40, st_blksize = 1075277812, st_blocks = 1073835200, st_atime = 134522768, st_atimensec = 3221221564, st_mtime = 1074560382, st_mtimensec = 40, st_ctime = 1075277812, st_ctimensec = 3221221592, __unused4 = 1074559989, __unused5 = 40} rval = 1075277812 ************************************************************************************* __stat (file=0xbffff070 "\200", buf=0xbffff070) at stat.c:51 both arguments of stat hold the same address. file should be AFAIK fname=0xbffff110. I isolated the function to a test_program and it works fine there. Any ideas? Regards, Oliver -- Leben ist mehr als ... <http://www.nak-nrw.de/index.php?id=71> --------------------------------------------------------------------- To unsubscribe, e-mail: opensuse-programming+unsubscribe(a)opensuse.org For additional commands, e-mail: opensuse-programming+help(a)opensuse.org

15 years, 5 months

[opensuse-programming] Threadsafe STL

by Jerry Feldman

The Linux C++ STL (Standard Template Library) is not threadsafe. I'm working on a project where I will need the functionality of the STL but it also must be threadsafe. Currently, the only Rogue Wave® SourcePro® C++. I've used this before, and the company I am working with has used it in some of their products, but their version is several years old. Other than STL, Rogue Wave® contains libraries for things like Linear Algebra (LAPACK). What I would like to know is if there are other good commercial (or OpenSource) threadsafe STLs. BTW: The C++ standards committee will probably never endorse threadsafeness. -- Jerry Feldman <gaf(a)blu.org> Boston Linux and Unix user group http://www.blu.org PGP key id:C5061EA9 PGP Key fingerprint:053C 73EC 3AC1 5C44 3E14 9245 FB00 3ED5 C506 1EA9

15 years, 6 months

[opensuse-programming] Re: [suse-programming-e] configuration file handling

by Bernhard Walle

* Oliver Block <lists(a)block-online.eu> [2006-11-09 16:34]: > > does anybody know if there is a C library for configuration file handling > shipped with suse? What do you consider as "configuration file"? Simple property files like Windows .ini? [section] key1=value1 key2=value2 A parser for such things is in glib2, which is of course shipped with SUSE. See http://developer.gnome.org/doc/API/2.0/glib/glib-Key-value-file-parser.html for a documentation. Bernhard -- "Der Mensch erfand die Atombombe, doch keine Maus der Welt würde eine Mausefalle konstruieren." -- Albert Einstein

15 years, 6 months

[opensuse-programming] Re: [SLE] [owner] Heads up! Migration around 12:30 GMT

by Greg Freemyer

On 11/10/06, Henne Vogelsang <hvogel(a)opensuse.org> wrote: > Hey people, > > as promised heres the heads up mail about the list migration. We will > start to migrate lists around 12:30 GMT [1]. After noon i wont > accept new subscribers anymore and by 12:35 everything should be > migrated. > > Henne > > [1] To see what time that is in your timezone use > > date -d "12:30 GMT" > > -- > Henne Vogelsang, Core Services > "Rules change. The Game remains the same." > - Omar (The Wire) I know it is late to complain, but I've just tried to update my filter. First you can see the I'm subscribed via a gmail address. I don't download the msgs but work with them directly at gmail.com. I suspect that there are a lot of us doing that on this list, but I have not paid that much attention to the various subscribers domains. gmail has very limited filtering cabability. In the past I filtered on subject; [SLE]. Without testing I assumed I could change that to [opensuse] and all would be well. Unfortunately gmail ignores the [] chars and is finding opensuse in any subject line. I subscribe to a number of lists which might have opensuse in the subject line. Specifically when I applied this rule to my e-mail archive it picked up dozens of old non-SLE msgs and tagged them as SLE. Earlier proposals of opensuse-en are sounding even better to me because it would provide a more unusual filter item in the subject line. Note that for gmail users all we care about is what the pretag in the subject says. The details in the xmailinglist header entry are not a concern to gmail users, so there is no need to change that aspect, just the subject pretag. Thanks Greg -- Greg Freemyer The Norcross Group Forensics for the 21st Century --------------------------------------------------------------------- To unsubscribe, e-mail: opensuse-programming+unsubscribe(a)opensuse.org For additional commands, e-mail: opensuse-programming+help(a)opensuse.org

15 years, 6 months

[opensuse-programming] Re: [owner] Heads up! Migration around 12:30 GMT

by Henne Vogelsang

Hi, > by 12:35 everything should be migrated. It is now. If you encounter any problem let me know! Henne -- Henne Vogelsang, Core Services "Rules change. The Game remains the same." - Omar (The Wire) --------------------------------------------------------------------- To unsubscribe, e-mail: opensuse-programming+unsubscribe(a)opensuse.org For additional commands, e-mail: opensuse-programming+help(a)opensuse.org

15 years, 6 months

This list will be migrated to opensuse-programming@opensuse.org

by Henne Vogelsang

Hi, as announced a while ago on the big lists [1] we will move this list to the new mailinglist server. We have also decided to rename it while moving it. All this will happen this friday (2006.11.10). I cant say exactly at which time but i will send a short heads-up mail right before we are doing it. This means a few things for you. 1. This list, suse-programming-e(a)suse.com, will be renamed to opensuse-programming(a)opensuse.org This means that mails to you will come from the new address and for posting you also have to send mail to opensuse-programming(a)opensuse.org. The old list adress will still work but is depreceated. I will turn it off in the future (with notice). 2. Your subscription will get transfered to the new listserver. No action on your part is required to continue reciving mails from this list. 3. Because of the renaming the mailinglist headers will change. If you filter for headers in your mail setup please adopt your setup accordingly. New headers will look like this: Delivered-To: opensuse-programming(a)lists4.opensuse.org Mailing-List: contact opensuse-programming+help(a)opensuse.org; run by mlmmj X-Mailinglist: opensuse-programming List-Post: <mailto:opensuse-programming@opensuse.org> List-Help: <mailto:opensuse-programming+help@opensuse.org> List-Subscribe: <mailto:opensuse-programming+subscribe@opensuse.org> List-Unsubscribe: <mailto:opensuse-programming+unsubscribe@opensuse.org> List-Owner: <mailto:opensuse-programming+owner@opensuse.org> 4. Mails will originate from the new server. If you accepts listmails only from the listserver adopt your setup accordingly. The mails will originate from DNS: lists4.suse.de IP: 195.135.221.135 5. The webarchive of this list is located at http://lists.opensuse.org/opensuse-programming/ 6. We are using a new mailinglist manager on the new server. This means some aspects of using the list changed. Some features are dropped and some new features are added. For a complete list check out this post: http://lists.opensuse.org/opensuse-announce/2006-08/msg00005.html 7. If you have any problems at all with the new setup please dont hesitate to contact me! Henne [1] http://lists.suse.com/archive/suse-linux-e/2006-Nov/1464.html http://lists.suse.com/archive/suse-linux/2006-Nov/0440.html -- ml-admin

15 years, 6 months

SIGSEGV / gethostbyname

by Oliver Block

Hello everybody, yesterday I was facing a problem. A system function gethostbyname() that expects one argument, a const char* causes a segmentation fault. The function call code is - probably not saying much - the following: char *http_send_recv(char *hostname, char *request) { struct hostent *hptr; ... if( hptr = gethostbyname( hostname )) memcpy(&sin.sin_addr, hptr->h_addr, hptr->h_length); else { /* error */ } ... } gdb output: (gdb) p hostname $1 = 0x804916b "www.oliver-block.eu" (gdb) s 5701: symbol=gethostbyname; lookup in file=/home/oblock/programming/c/tcp/ddnscli 5701: symbol=gethostbyname; lookup in file=/lib/tls/libc.so.6 lookup 0x08048000 0x00000284 -> 0x40034000 0x000c9ae0 /1 gethostbyname 5701: symbol=malloc; lookup in file=/home/oblock/programming/c/tcp/ddnscli 5701: symbol=malloc; lookup in file=/lib/tls/libc.so.6 Program received signal SIGSEGV, Segmentation fault. 0x40007b46 in do_lookup_x () from /lib/ld-linux.so.2 (gdb) bt #0 0x40007b46 in do_lookup_x () from /lib/ld-linux.so.2 #1 0x400084ae in _dl_lookup_symbol_x () from /lib/ld-linux.so.2 #2 0x4000cc26 in fixup () from /lib/ld-linux.so.2 #3 0x4000c9f0 in _dl_runtime_resolve () from /lib/ld-linux.so.2 #4 0x400fdb3f in gethostbyname () from /lib/tls/libc.so.6 #5 0x08048d1b in http_send_recv (hostname=0x804916b "www.oliver-block.eu", request=0x804914f "GET /checkip.php /HTTP1.1\r\n") at ddnscli.c:161 #6 0x08048e12 in get_ip () at ddnscli.c:191 #7 0x08048f01 in main (argc=6, argv=0xbffff174) at ddnscli.c:243 (gdb) Help is appreciated. Best regards, Oliver -- Leben ist mehr als ... <http://www.nak-nrw.de/index.php?id=71>

15 years, 6 months

... continued SIGSEGV

by Oliver Block

On a ...ahem ... Debian sarge box ... ahem ... I get another gdb, not stating gethostbyname but getservbyname which is called right after gethostbyname() gdb output; (gdb) bt #0 0x40011a14 in realloc () from /lib/ld-linux.so.2 #1 0x40006381 in _dl_map_object () from /lib/ld-linux.so.2 #2 0x40123e3a in getutmpx () from /lib/libc.so.6 #3 0x4000c016 in _dl_catch_error () from /lib/ld-linux.so.2 #4 0x40124676 in _dl_open () from /lib/libc.so.6 #5 0x401259b3 in _dl_mcount_wrapper_check () from /lib/libc.so.6 #6 0x4000c016 in _dl_catch_error () from /lib/ld-linux.so.2 #7 0x4012596e in _dl_mcount_wrapper_check () from /lib/libc.so.6 #8 0x40125a68 in __libc_dlopen_mode () from /lib/libc.so.6 #9 0x40104478 in __nss_lookup_function () from /lib/libc.so.6 #10 0x4010403f in __nss_database_lookup () from /lib/libc.so.6 #11 0x40105e73 in __nss_hostname_digits_dots () from /lib/libc.so.6 #12 0x401095c8 in getservbyname_r () from /lib/libc.so.6 #13 0x40109416 in getservbyname () from /lib/libc.so.6 #14 0x08048d34 in http_send_recv (hostname=0x804919b "www.oliver-block.eu", request=0x804917f "GET /checkip.php /HTTP1.1\r\n") at ddnscli.c:166 #15 0x08048e14 in get_ip () at ddnscli.c:191 #16 0x08048ef6 in main (argc=5, argv=0xbffffb24) at ddnscli.c:243 -- Leben ist mehr als ... <http://www.nak-nrw.de/index.php?id=71>

15 years, 6 months

[owner] List migration

by Henne Vogelsang

Hi, sorry for the massive crosspost but this is important and urgent. We have a situation with lists.suse.com and we want to migrate lists to a new server. Details about this you can read on the big lists. Please discuss there too. English: http://lists.suse.com/archive/suse-linux-e/2006-Nov/1464.html German: http://lists.suse.com/archive/suse-linux/2006-Nov/0440.html Henne -- Henne Vogelsang, ml-admin "Rules change. The Game remains the same." - Omar (The Wire)

15 years, 6 months

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openSUSE Programming November 2006