[Bug 416404] New: Resolver blocks and cannot be aborted (ping)
https://bugzilla.novell.com/show_bug.cgi?id=416404 Summary: Resolver blocks and cannot be aborted (ping) Product: openSUSE 11.0 Version: Final Platform: Other OS/Version: Other Status: NEW Severity: Normal Priority: P5 - None Component: Basesystem AssignedTo: bnc-team-screening@forge.provo.novell.com ReportedBy: lmb@novell.com QAContact: qa@suse.de Found By: Development Created an attachment (id=232808) --> (https://bugzilla.novell.com/attachment.cgi?id=232808) strace -ro from ping If I call "ping dale.suse.de" on my 11.0 system, tries to lookup the address, which can take a while. That is annoying, but more annoying is that I cannot abort the lookup: ping dale.suse.de PING dale.suse.de (10.10.2.87) 56(84) bytes of data. ^C^C^C^C^C^C^C^C64 bytes from 10.10.2.87: icmp_seq=1 ttl=62 time=38.0 ms --- dale.suse.de ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 38.037/38.037/38.037/0.000 ms As you can see, the system did not respond to the SIGINT immediately; in fact, this takes >5 seconds! A direct strace to the console can be aborted immediately: connect(4, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.1.1")}, 28) = 0 fcntl64(4, F_GETFL) = 0x2 (flags O_RDWR) fcntl64(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0 gettimeofday({1218486639, 30936}, NULL) = 0 poll([{fd=4, events=POLLOUT, revents=POLLOUT}], 1, 0) = 1 send(4, "\370\210\1\0\0\1\0\0\0\0\0\0\00287\0012\00210\00210\7in-addr\4"..., 41, MSG_NOSIGNAL) = 41 poll(^C <unfinished ...> If I instruct syslog to log to a file (attached), it exhibits the same behaviour of being uninterruptible. It seems that ping blocks SIGINT to terminate cleanly and with printing the summary stats, but it does so before the possibly time-consuming lookup has completed. (This is also obvious from the fact that it is impossible to abort before the first ping packet has been sent.) I suggest to move the signal trickery to a later point in the code. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=416404 Cyril Hrubis <chrubis@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |chrubis@novell.com AssignedTo|bnc-team-screening@forge.provo.novell.com |pbaudis@novell.com -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=416404 User chrubis@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=416404#c1 Cyril Hrubis <chrubis@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|pbaudis@novell.com |ms@novell.com --- Comment #1 from Cyril Hrubis <chrubis@novell.com> 2008-08-15 06:49:49 MDT --- Oh sorry, it's not in glibc but in ping. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=416404 Marcus Schaefer <ms@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|Resolver blocks and cannot be aborted (ping) |iputils: ping, resolver blocks and cannot be | |aborted -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=416404 User ms@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=416404#c2 --- Comment #2 from Marcus Schaefer <ms@novell.com> 2008-08-18 03:21:07 MDT --- that's correct there is some lookup before setup() is called which sets the signals. Would the following patch solve your problem -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=416404 User ms@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=416404#c3 --- Comment #3 from Marcus Schaefer <ms@novell.com> 2008-08-18 03:21:52 MDT --- Created an attachment (id=233826) --> (https://bugzilla.novell.com/attachment.cgi?id=233826) ping.c patch -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=416404 Marcus Schaefer <ms@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |NEEDINFO Info Provider| |lmb@novell.com -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=416404 Marcus Schaefer <ms@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Priority|P5 - None |P2 - High -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=416404 User ms@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=416404#c4 --- Comment #4 from Marcus Schaefer <ms@novell.com> 2008-08-25 03:38:17 MDT --- any news here ? -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=416404 Marcus Schaefer <ms@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Priority|P2 - High |P5 - None -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=416404 User ms@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=416404#c5 --- Comment #5 from Marcus Schaefer <ms@novell.com> 2008-09-04 04:41:03 MDT --- last chance to respond with at least some comment before closing this one -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=416404 User lmb@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=416404#c6 Lars Marowsky-Bree <lmb@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |NEW Info Provider|lmb@novell.com | --- Comment #6 from Lars Marowsky-Bree <lmb@novell.com> 2008-09-04 04:47:26 MDT --- I think the patch looks good. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=416404 User ms@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=416404#c7 Marcus Schaefer <ms@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED --- Comment #7 from Marcus Schaefer <ms@novell.com> 2008-09-04 06:42:55 MDT --- ok, done, package submitted -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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