Bugzilla – Bug 549447
unscd does not share resolver options across sub-processes, causing DNS hangs when single-request is needed
Last modified: 2013-07-09 10:35:44 UTC
User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.3) Gecko/20090909 SUSE/3.5.3-3.1 Firefox/3.5.3 1. able to ping 2. firefox does not work 3. no repositories available. 4. resolve.conf is blank 5. if in firefox <about:config> and set network.dns.disableIPv6 to true then firefox work. Then I set it back to false as default. 6. Now yast/network devices/network setting/Hostname-DNS and I add the DNS from the router then all is back to normal. 7. resolve.conf ### /etc/resolv.conf file autogenerated by netconfig! # # Before you change this file manually, consider to define the # static DNS configuration using the following variables in the 8. Remove the DNS from the Hostname-DNS field and firefox does not work and the resolve.conf files is blanc again. There is a similar problem under Bug 546213 but I think there are difference. I reported what looks like the same problem under opensuse 11.1 The solution there was perfect. Here are bug reported under 11.1 which I believe is the same. Bug 463015 - Able to ping unable to connect Bug 441947 - getaddrinfo() breaks when resolv.conf points at buggy nameservers Reproducible: Always Steps to Reproduce: 1.able to ping. firefox unable to connect 2.if I change to true <network.dns.disableIPv6> in firefox, it works. 3.If I add DNS servers to the network device everything work Under opensuse 11.1 the problem was resolved replacing glibc.
The initial report was based on openSUSE-DVD-Build0334-x86_64.iso It is also in the openSUSE-KDE4-LiveCD-Build0336-x86_64.iso both when I run it from the CD or using the usb_stick. Besides using in my system I also create a vmware image and the same problem occur (which was expected becasue the basic system and router are the same)
Sorry, but I can't follow ... could you provide additional infos about the configuration that you're using in each step? (In reply to comment #0) > User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.3) > Gecko/20090909 SUSE/3.5.3-3.1 Firefox/3.5.3 > > 1. able to ping By IP or by name? What is in your resolv.conf? When it is empty, is there a local nameserver running? > 2. firefox does not work [...] > Steps to Reproduce: > 1.able to ping. firefox unable to connect > 2.if I change to true <network.dns.disableIPv6> in firefox, it works. > 3.If I add DNS servers to the network device everything work > > > > Under opensuse 11.1 the problem was resolved replacing glibc. Petr, do you have an idea what happens here?
For me it sounds like the problem in bug 441947, comment 25. Is it back?
Marius thxs for your reply I will use a the liveCD version. 1. Click on Firefox > server not found 2. Yast/software manager >cannot access installation media .....check wheather the server is accessible 3. open a terminal $ ping -c1 google.com $ ping -c1 74.125.67.100 both work OK. 4. /etc/resolv.conf nameserver 192.168.0.1 This is the address of the router. 5. Open firefox and access the router http:/192.168.0.1 and get the qwest DNS from there 205.171.3.25 205.171.2.25 6. Open yast/network devices/network setting Select Traditional Method with ifup Select Hostnamee/DNS and add Name server 1 -> 205.171.3.25 Name server 2 -> 205.171.2.25 No I can use firefox OK. 7. I replace those qwest DNS servers I got from the router with 2 public DNS servers 208.67.222.222 208.67.220.220 Also firefox works well. So it seems the system can not get the DNS from the router.
(In reply to comment #4) OK. This means there is nothing wrong with the setup netconfig does. I guess this is some variant of the problem described in bug 441947, comment 25 and you have one of the routers that gets confused. I reassign it to Petr, who knows what the glibc resolver is currently doing. Petr, similar strange things happen also when I install "bind" and set NETCONFIG_DNS_FORWARDER="bind" in /etc/sysconfig/network/config to use a local bind forwarder, so there is no nameserver in /etc/resolv.conf. balios:~ # host www.novell.com www.novell.com has address 130.57.5.25 balios:~ # ping www.novell.com ping: unknown host www.novell.com
I have just repeated all the steps done above but using RC2 openSUSE-DVD-Build0339-x86_64.iso openSUSE-KDE4-LiveCD-Build0339-x86_64.iso the same results.
>...you have one of the routers that gets confused Yes Marius, I know and the easy way would be to get a different one but this is a popular dsl modem/router (http://www.qwest.com/internethelp/modems/motorola-3347/index.html) that is the one that Qwest gives you so I though is important to have it fix.
it's said but true that popular dsl modems are the worst, but it's not _that_ popular that we will delay 11.2 because of this problem. And this glibc is shared with all new linux distributions coming out now, so if linux is popular among quest customers, a new firmware will appear before christmas.
Teruel, can you check if unscd is running on your system? Please paste output of `ps axu | grep nscd`. If nscd is running, second, can you please check if `wget http://www.google.com/` works? If not, can you prefix the command with `strace ` and attach the output to this bug? Thank you! Marius, can you please open a separate bug? In the meantime, are you running nscd?
Hi Petr thxs for coming to the rescue again ;-). The work all of you have done with 11.2 is fantastic BIG THANKS! (1) tdec@linux-lrmo:~> ps axu | grep nscd root 4615 0.0 0.0 174572 1248 ? Ssl 16:04 0:00 /usr/sbin/nscd tdec 6656 0.0 0.0 5288 828 pts/1 S+ 21:56 0:00 grep nscd (2) tdec@linux-lrmo:~> wget http://www.google.com/ --2009-10-31 21:55:55-- http://www.google.com/ Resolving www.google.com... 74.125.65.99, 74.125.65.147, 74.125.65.104, ... Connecting to www.google.com|74.125.65.99|:80... connected. HTTP request sent, awaiting response... 200 OK Length: unspecified [text/html] Saving to: `index.html.1' [ <=> ] 5,417 --.-K/s in 0.07s 2009-10-31 21:55:55 (80.4 KB/s) - `index.html.1' saved [5417] Ciao
Petr the previous message was wrong and I could not delete it. It was done under 11.1 :-( Here is the real one under RC2 Live CD 64b 1. I change to ifup and I add the 2 DNS servers into the network settings 1.1 linux@linux:~> ps axu | grep nscd nobody 3233 0.0 0.0 3840 448 ? Rs 04:06 0:00 /usr/sbin/nscd linux 6325 0.0 0.0 7396 848 pts/0 S+ 04:11 0:00 grep nscd 1.2 linux@linux:~> wget http://www.google.com/ --2009-11-01 04:12:07-- http://www.google.com/ Resolving www.google.com... 74.125.65.106, 74.125.65.104, 74.125.65.105, ... Connecting to www.google.com|74.125.65.106|:80... connected. HTTP request sent, awaiting response... 200 OK Length: unspecified [text/html] Saving to: `index.html' [ <=> ] 5,417 --.-K/s in 0.06s 2009-11-01 04:12:07 (88.4 KB/s) - `index.html' saved [5417] 1.3 /etc/resolv.conf nameserver 205.171.3.25 nameserver 205.171.2.25 nameserver 192.168.0.1 2. Here I restore the knetwork manager after delete the 2 DNS 2.1 linux@linux:~> ps axu | grep nscd nobody 3233 0.0 0.0 3840 452 ? Rs 04:06 0:00 /usr/sbin/nscd linux 7826 0.0 0.0 7396 848 pts/0 S+ 04:15 0:00 grep nscd 2.2 linux@linux:~> wget http://www.google.com/ --2009-11-01 04:16:14-- http://www.google.com/ Resolving www.google.com... failed: Name or service not known. wget: unable to resolve host address `www.google.com' 2.3 linux@linux:~> strace wget http://www.google.com/ execve("/usr/bin/wget", ["wget", "http://www.google.com/"], [/* 78 vars */]) = 0 brk(0) = 0x645000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6ca7bb9000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6ca7bb8000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=74407, ...}) = 0 mmap(NULL, 74407, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f6ca7ba5000 close(3) = 0 open("/lib64/librt.so.1", O_RDONLY) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340\"\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=36016, ...}) = 0 mmap(NULL, 2132976, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f6ca7794000 fadvise64(3, 0, 2132976, POSIX_FADV_WILLNEED) = 0 mprotect(0x7f6ca779c000, 2093056, PROT_NONE) = 0 mmap(0x7f6ca799b000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x7000) = 0x7f6ca799b000 close(3) = 0 open("/usr/lib64/libssl.so.0.9.8", O_RDONLY) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\220=\1\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0555, st_size=326256, ...}) = 0 mmap(NULL, 2421456, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f6ca7544000 fadvise64(3, 0, 2421456, POSIX_FADV_WILLNEED) = 0 mprotect(0x7f6ca758d000, 2093056, PROT_NONE) = 0 mmap(0x7f6ca778c000, 32768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x48000) = 0x7f6ca778c000 close(3) = 0 open("/usr/lib64/libcrypto.so.0.9.8", O_RDONLY) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\220\245\6\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0555, st_size=1605840, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6ca7ba4000 mmap(NULL, 3715896, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f6ca71b8000 fadvise64(3, 0, 3715896, POSIX_FADV_WILLNEED) = 0 mprotect(0x7f6ca731b000, 2093056, PROT_NONE) = 0 mmap(0x7f6ca751a000, 155648, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x162000) = 0x7f6ca751a000 mmap(0x7f6ca7540000, 13112, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f6ca7540000 close(3) = 0 open("/lib64/libc.so.6", O_RDONLY) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\220\353\1\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1408560, ...}) = 0 mmap(NULL, 3516488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f6ca6e5d000 fadvise64(3, 0, 3516488, POSIX_FADV_WILLNEED) = 0 mprotect(0x7f6ca6fae000, 2097152, PROT_NONE) = 0 mmap(0x7f6ca71ae000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x151000) = 0x7f6ca71ae000 mmap(0x7f6ca71b3000, 18504, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f6ca71b3000 close(3) = 0 open("/lib64/libpthread.so.0", O_RDONLY) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360X\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=131260, ...}) = 0 mmap(NULL, 2208640, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f6ca6c41000 fadvise64(3, 0, 2208640, POSIX_FADV_WILLNEED) = 0 mprotect(0x7f6ca6c57000, 2097152, PROT_NONE) = 0 mmap(0x7f6ca6e57000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x16000) = 0x7f6ca6e57000 mmap(0x7f6ca6e59000, 13184, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f6ca6e59000 close(3) = 0 open("/lib64/libdl.so.2", O_RDONLY) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360\r\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=14872, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6ca7ba3000 mmap(NULL, 2109696, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f6ca6a3d000 fadvise64(3, 0, 2109696, POSIX_FADV_WILLNEED) = 0 mprotect(0x7f6ca6a3f000, 2097152, PROT_NONE) = 0 mmap(0x7f6ca6c3f000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7f6ca6c3f000 close(3) = 0 open("/lib64/libz.so.1", O_RDONLY) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20\36\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=88640, ...}) = 0 mmap(NULL, 2183664, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f6ca6827000 fadvise64(3, 0, 2183664, POSIX_FADV_WILLNEED) = 0 mprotect(0x7f6ca683b000, 2097152, PROT_NONE) = 0 mmap(0x7f6ca6a3b000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x14000) = 0x7f6ca6a3b000 close(3) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6ca7ba2000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6ca7ba1000 arch_prctl(ARCH_SET_FS, 0x7f6ca7ba16f0) = 0 mprotect(0x7f6ca6a3b000, 4096, PROT_READ) = 0 mprotect(0x7f6ca6c3f000, 4096, PROT_READ) = 0 mprotect(0x7f6ca6e57000, 4096, PROT_READ) = 0 mprotect(0x7f6ca71ae000, 16384, PROT_READ) = 0 mprotect(0x7f6ca751a000, 57344, PROT_READ) = 0 mprotect(0x7f6ca778c000, 8192, PROT_READ) = 0 mprotect(0x7f6ca799b000, 4096, PROT_READ) = 0 mprotect(0x636000, 4096, PROT_READ) = 0 mprotect(0x7f6ca7bba000, 4096, PROT_READ) = 0 munmap(0x7f6ca7ba5000, 74407) = 0 set_tid_address(0x7f6ca7ba17c0) = 7955 set_robust_list(0x7f6ca7ba17d0, 0x18) = 0 futex(0x7fffe0eac5bc, FUTEX_WAKE_PRIVATE, 1) = 0 futex(0x7fffe0eac5bc, 0x189 /* FUTEX_??? */, 1, NULL, 7f6ca7ba16f0) = -1 EAGAIN (Resource temporarily unavailable) rt_sigaction(SIGRTMIN, {0x7f6ca6c46780, [], SA_RESTORER|SA_SIGINFO, 0x7f6ca6c4fc00}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {0x7f6ca6c46810, [], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x7f6ca6c4fc00}, NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM_INFINITY}) = 0 brk(0) = 0x645000 brk(0x666000) = 0x666000 open("/usr/lib/locale/locale-archive", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/locale.alias", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=2512, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6ca7bb7000 read(3, "# Locale name alias data base.\n#"..., 4096) = 2512 read(3, "", 4096) = 0 close(3) = 0 munmap(0x7f6ca7bb7000, 4096) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_IDENTIFICATION", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=373, ...}) = 0 mmap(NULL, 373, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f6ca7bb7000 close(3) = 0 open("/usr/lib64/gconv/gconv-modules.cache", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=26050, ...}) = 0 mmap(NULL, 26050, PROT_READ, MAP_SHARED, 3, 0) = 0x7f6ca7bb0000 close(3) = 0 futex(0x7f6ca71b2f60, FUTEX_WAKE_PRIVATE, 2147483647) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_MEASUREMENT", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_MEASUREMENT", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=23, ...}) = 0 mmap(NULL, 23, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f6ca7baf000 close(3) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_TELEPHONE", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_TELEPHONE", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=59, ...}) = 0 mmap(NULL, 59, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f6ca7bae000 close(3) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_ADDRESS", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_ADDRESS", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=155, ...}) = 0 mmap(NULL, 155, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f6ca7bad000 close(3) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_NAME", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_NAME", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=77, ...}) = 0 mmap(NULL, 77, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f6ca7bac000 close(3) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_PAPER", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_PAPER", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=34, ...}) = 0 mmap(NULL, 34, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f6ca7bab000 close(3) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_MESSAGES", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_MESSAGES", O_RDONLY) = 3 fstat(3, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 close(3) = 0 open("/usr/lib/locale/en_US.utf8/LC_MESSAGES/SYS_LC_MESSAGES", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=52, ...}) = 0 mmap(NULL, 52, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f6ca7baa000 close(3) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_MONETARY", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_MONETARY", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=286, ...}) = 0 mmap(NULL, 286, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f6ca7ba9000 close(3) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_COLLATE", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_COLLATE", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=966938, ...}) = 0 mmap(NULL, 966938, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f6ca7ab4000 close(3) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_TIME", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_TIME", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=2454, ...}) = 0 mmap(NULL, 2454, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f6ca7ba8000 close(3) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_NUMERIC", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_NUMERIC", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=54, ...}) = 0 mmap(NULL, 54, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f6ca7ba7000 close(3) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_CTYPE", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_CTYPE", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=256316, ...}) = 0 mmap(NULL, 256316, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f6ca7a75000 close(3) = 0 stat("/etc/wgetrc", {st_mode=S_IFREG|0644, st_size=4306, ...}) = 0 open("/etc/wgetrc", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=4306, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6ca7a74000 read(3, "###\n### Sample Wget initializati"..., 4096) = 4096 read(3, "to on:\n#backup_converted = off\n\n"..., 4096) = 210 read(3, "", 4096) = 0 close(3) = 0 munmap(0x7f6ca7a74000, 4096) = 0 stat("/home/linux/.wgetrc", 0x7fffe0eac3c0) = -1 ENOENT (No such file or directory) ioctl(2, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 ioctl(2, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 rt_sigaction(SIGHUP, {0x1, [HUP], SA_RESTORER|SA_RESTART, 0x7f6ca6e8f560}, {SIG_DFL, [], 0}, 8) = 0 rt_sigaction(SIGHUP, {0x41c8b0, [HUP], SA_RESTORER|SA_RESTART, 0x7f6ca6e8f560}, {0x1, [HUP], SA_RESTORER|SA_RESTART, 0x7f6ca6e8f560}, 8) = 0 rt_sigaction(SIGUSR1, {0x41c8b0, [USR1], SA_RESTORER|SA_RESTART, 0x7f6ca6e8f560}, {SIG_DFL, [], 0}, 8) = 0 rt_sigaction(SIGPIPE, {0x1, [PIPE], SA_RESTORER|SA_RESTART, 0x7f6ca6e8f560}, {SIG_DFL, [], 0}, 8) = 0 rt_sigaction(SIGWINCH, {0x41d190, [WINCH], SA_RESTORER|SA_RESTART, 0x7f6ca6e8f560}, {SIG_DFL, [], 0}, 8) = 0 stat("index.html", {st_mode=S_IFREG|0644, st_size=5417, ...}) = 0 stat("index.html.1", 0x7fffe0eabf40) = -1 ENOENT (No such file or directory) stat("index.html.1", 0x7fffe0eac030) = -1 ENOENT (No such file or directory) gettimeofday({1257049187, 252541}, NULL) = 0 open("/etc/localtime", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=118, ...}) = 0 fstat(3, {st_mode=S_IFREG|0644, st_size=118, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6ca7a74000 read(3, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0\1\0\0\0\0"..., 4096) = 118 lseek(3, -62, SEEK_CUR) = 56 read(3, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0\1\0\0\0\0"..., 4096) = 62 close(3) = 0 munmap(0x7f6ca7a74000, 4096) = 0 write(2, "--2009-11-01 04:19:47-- http://"..., 48--2009-11-01 04:19:47-- http://www.google.com/ ) = 48 stat("/home/linux/.netrc", 0x7fffe0eabd30) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en_US.UTF-8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en_US.UTF-8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en_US.UTF-8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en_US.utf8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en_US.utf8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en_US.utf8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en_US/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en_US/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en_US/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en.UTF-8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en.UTF-8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en.UTF-8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en.utf8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en.utf8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en.utf8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) write(2, "Resolving www.google.com... ", 28Resolving www.google.com... ) = 28 socket(PF_NETLINK, SOCK_RAW, 0) = 3 bind(3, {sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 0 getsockname(3, {sa_family=AF_NETLINK, pid=7955, groups=00000000}, [12]) = 0 gettimeofday({1257049187, 254019}, NULL) = 0 sendto(3, "\24\0\0\0\26\0\1\3c\f\355J\0\0\0\0\0\0\0\0", 20, 0, {sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 20 recvmsg(3, {msg_name(12)={sa_family=AF_NETLINK, pid=0, groups=00000000}, msg_iov(1)=[{"8\0\0\0\24\0\2\0c\f\355J\23\37\0\0\2\10\200\376\1\0\0\0\10\0\1\0\177\0\0\1"..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 172 recvmsg(3, {msg_name(12)={sa_family=AF_NETLINK, pid=0, groups=00000000}, msg_iov(1)=[{"@\0\0\0\24\0\2\0c\f\355J\23\37\0\0\n\200\200\376\1\0\0\0\24\0\1\0\0\0\0\0"..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 128 recvmsg(3, {msg_name(12)={sa_family=AF_NETLINK, pid=0, groups=00000000}, msg_iov(1)=[{"\24\0\0\0\3\0\2\0c\f\355J\23\37\0\0\0\0\0\0\1\0\0\0\24\0\1\0\0\0\0\0"..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 20 close(3) = 0 socket(PF_FILE, 0x80801 /* SOCK_??? */, 0) = 3 connect(3, {sa_family=AF_FILE, path="/var/run/nscd/socket"}, 110) = 0 sendto(3, "\2\0\0\0\r\0\0\0\6\0\0\0hosts\0", 18, MSG_NOSIGNAL, NULL, 0) = 18 poll([{fd=3, events=POLLIN|POLLERR|POLLHUP}], 1, 5000) = 1 ([{fd=3, revents=POLLIN|POLLHUP}]) recvmsg(3, {msg_name(0)=NULL, msg_iov(2)=[{"\321x\36\247\0\0", 6}, {"\340\314\350\246l\177\0\0", 8}], msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_CMSG_CLOEXEC) = 0 close(3) = 0 socket(PF_FILE, 0x80801 /* SOCK_??? */, 0) = 3 connect(3, {sa_family=AF_FILE, path="/var/run/nscd/socket"}, 110) = 0 sendto(3, "\2\0\0\0\16\0\0\0\17\0\0\0www.google.com\0", 27, MSG_NOSIGNAL, NULL, 0) = 27 poll([{fd=3, events=POLLIN|POLLERR|POLLHUP}], 1, 5000) = 1 ([{fd=3, revents=POLLIN}]) read(3, "\2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 24) = 24 close(3) = 0 open("/usr/share/locale-langpack/en_US.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en_US.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en_US.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en_US.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en_US.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en_US.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en_US/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en_US/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en_US/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) write(2, "failed: Name or service not know"..., 35failed: Name or service not known. ) = 35 write(2, "wget: unable to resolve host add"..., 54wget: unable to resolve host address `www.google.com' ) = 54 gettimeofday({1257049187, 356010}, NULL) = 0 stat("/etc/localtime", {st_mode=S_IFREG|0644, st_size=118, ...}) = 0 close(2) = 0 exit_group(1) = ? 2.4 /etc/resolv.conf nameserver 192.168.0.1 3. Here I keep ifup and I delete the two DNS 3.1 linux@linux:~> ps axu | grep nscd nobody 3233 0.0 0.0 3840 452 ? Rs 04:06 0:00 /usr/sbin/nscd linux 12446 0.0 0.0 7396 848 pts/0 R+ 04:28 0:00 grep nscd 3.2 linux@linux:~> wget http://www.google.com/ --2009-11-01 04:28:28-- http://www.google.com/ Resolving www.google.com... failed: Name or service not known. wget: unable to resolve host address `www.google.com' 3.3 linux@linux:~> strace wget http://www.google.com/ execve("/usr/bin/wget", ["wget", "http://www.google.com/"], [/* 78 vars */]) = 0 brk(0) = 0x645000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0ad05e8000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0ad05e7000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=74407, ...}) = 0 mmap(NULL, 74407, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f0ad05d4000 close(3) = 0 open("/lib64/librt.so.1", O_RDONLY) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340\"\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=36016, ...}) = 0 mmap(NULL, 2132976, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f0ad01c3000 fadvise64(3, 0, 2132976, POSIX_FADV_WILLNEED) = 0 mprotect(0x7f0ad01cb000, 2093056, PROT_NONE) = 0 mmap(0x7f0ad03ca000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x7000) = 0x7f0ad03ca000 close(3) = 0 open("/usr/lib64/libssl.so.0.9.8", O_RDONLY) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\220=\1\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0555, st_size=326256, ...}) = 0 mmap(NULL, 2421456, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f0acff73000 fadvise64(3, 0, 2421456, POSIX_FADV_WILLNEED) = 0 mprotect(0x7f0acffbc000, 2093056, PROT_NONE) = 0 mmap(0x7f0ad01bb000, 32768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x48000) = 0x7f0ad01bb000 close(3) = 0 open("/usr/lib64/libcrypto.so.0.9.8", O_RDONLY) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\220\245\6\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0555, st_size=1605840, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0ad05d3000 mmap(NULL, 3715896, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f0acfbe7000 fadvise64(3, 0, 3715896, POSIX_FADV_WILLNEED) = 0 mprotect(0x7f0acfd4a000, 2093056, PROT_NONE) = 0 mmap(0x7f0acff49000, 155648, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x162000) = 0x7f0acff49000 mmap(0x7f0acff6f000, 13112, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f0acff6f000 close(3) = 0 open("/lib64/libc.so.6", O_RDONLY) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\220\353\1\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1408560, ...}) = 0 mmap(NULL, 3516488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f0acf88c000 fadvise64(3, 0, 3516488, POSIX_FADV_WILLNEED) = 0 mprotect(0x7f0acf9dd000, 2097152, PROT_NONE) = 0 mmap(0x7f0acfbdd000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x151000) = 0x7f0acfbdd000 mmap(0x7f0acfbe2000, 18504, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f0acfbe2000 close(3) = 0 open("/lib64/libpthread.so.0", O_RDONLY) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360X\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=131260, ...}) = 0 mmap(NULL, 2208640, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f0acf670000 fadvise64(3, 0, 2208640, POSIX_FADV_WILLNEED) = 0 mprotect(0x7f0acf686000, 2097152, PROT_NONE) = 0 mmap(0x7f0acf886000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x16000) = 0x7f0acf886000 mmap(0x7f0acf888000, 13184, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f0acf888000 close(3) = 0 open("/lib64/libdl.so.2", O_RDONLY) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360\r\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=14872, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0ad05d2000 mmap(NULL, 2109696, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f0acf46c000 fadvise64(3, 0, 2109696, POSIX_FADV_WILLNEED) = 0 mprotect(0x7f0acf46e000, 2097152, PROT_NONE) = 0 mmap(0x7f0acf66e000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7f0acf66e000 close(3) = 0 open("/lib64/libz.so.1", O_RDONLY) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20\36\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=88640, ...}) = 0 mmap(NULL, 2183664, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f0acf256000 fadvise64(3, 0, 2183664, POSIX_FADV_WILLNEED) = 0 mprotect(0x7f0acf26a000, 2097152, PROT_NONE) = 0 mmap(0x7f0acf46a000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x14000) = 0x7f0acf46a000 close(3) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0ad05d1000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0ad05d0000 arch_prctl(ARCH_SET_FS, 0x7f0ad05d06f0) = 0 mprotect(0x7f0acf46a000, 4096, PROT_READ) = 0 mprotect(0x7f0acf66e000, 4096, PROT_READ) = 0 mprotect(0x7f0acf886000, 4096, PROT_READ) = 0 mprotect(0x7f0acfbdd000, 16384, PROT_READ) = 0 mprotect(0x7f0acff49000, 57344, PROT_READ) = 0 mprotect(0x7f0ad01bb000, 8192, PROT_READ) = 0 mprotect(0x7f0ad03ca000, 4096, PROT_READ) = 0 mprotect(0x636000, 4096, PROT_READ) = 0 mprotect(0x7f0ad05e9000, 4096, PROT_READ) = 0 munmap(0x7f0ad05d4000, 74407) = 0 set_tid_address(0x7f0ad05d07c0) = 12458 set_robust_list(0x7f0ad05d07d0, 0x18) = 0 futex(0x7fff502e765c, FUTEX_WAKE_PRIVATE, 1) = 0 futex(0x7fff502e765c, 0x189 /* FUTEX_??? */, 1, NULL, 7f0ad05d06f0) = -1 EAGAIN (Resource temporarily unavailable) rt_sigaction(SIGRTMIN, {0x7f0acf675780, [], SA_RESTORER|SA_SIGINFO, 0x7f0acf67ec00}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {0x7f0acf675810, [], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x7f0acf67ec00}, NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM_INFINITY}) = 0 brk(0) = 0x645000 brk(0x666000) = 0x666000 open("/usr/lib/locale/locale-archive", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/locale.alias", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=2512, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0ad05e6000 read(3, "# Locale name alias data base.\n#"..., 4096) = 2512 read(3, "", 4096) = 0 close(3) = 0 munmap(0x7f0ad05e6000, 4096) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_IDENTIFICATION", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=373, ...}) = 0 mmap(NULL, 373, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f0ad05e6000 close(3) = 0 open("/usr/lib64/gconv/gconv-modules.cache", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=26050, ...}) = 0 mmap(NULL, 26050, PROT_READ, MAP_SHARED, 3, 0) = 0x7f0ad05df000 close(3) = 0 futex(0x7f0acfbe1f60, FUTEX_WAKE_PRIVATE, 2147483647) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_MEASUREMENT", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_MEASUREMENT", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=23, ...}) = 0 mmap(NULL, 23, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f0ad05de000 close(3) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_TELEPHONE", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_TELEPHONE", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=59, ...}) = 0 mmap(NULL, 59, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f0ad05dd000 close(3) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_ADDRESS", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_ADDRESS", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=155, ...}) = 0 mmap(NULL, 155, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f0ad05dc000 close(3) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_NAME", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_NAME", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=77, ...}) = 0 mmap(NULL, 77, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f0ad05db000 close(3) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_PAPER", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_PAPER", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=34, ...}) = 0 mmap(NULL, 34, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f0ad05da000 close(3) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_MESSAGES", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_MESSAGES", O_RDONLY) = 3 fstat(3, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 close(3) = 0 open("/usr/lib/locale/en_US.utf8/LC_MESSAGES/SYS_LC_MESSAGES", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=52, ...}) = 0 mmap(NULL, 52, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f0ad05d9000 close(3) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_MONETARY", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_MONETARY", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=286, ...}) = 0 mmap(NULL, 286, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f0ad05d8000 close(3) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_COLLATE", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_COLLATE", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=966938, ...}) = 0 mmap(NULL, 966938, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f0ad04e3000 close(3) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_TIME", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_TIME", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=2454, ...}) = 0 mmap(NULL, 2454, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f0ad05d7000 close(3) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_NUMERIC", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_NUMERIC", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=54, ...}) = 0 mmap(NULL, 54, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f0ad05d6000 close(3) = 0 open("/usr/lib/locale/en_US.UTF-8/LC_CTYPE", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/en_US.utf8/LC_CTYPE", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=256316, ...}) = 0 mmap(NULL, 256316, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f0ad04a4000 close(3) = 0 stat("/etc/wgetrc", {st_mode=S_IFREG|0644, st_size=4306, ...}) = 0 open("/etc/wgetrc", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=4306, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0ad04a3000 read(3, "###\n### Sample Wget initializati"..., 4096) = 4096 read(3, "to on:\n#backup_converted = off\n\n"..., 4096) = 210 read(3, "", 4096) = 0 close(3) = 0 munmap(0x7f0ad04a3000, 4096) = 0 stat("/home/linux/.wgetrc", 0x7fff502e7460) = -1 ENOENT (No such file or directory) ioctl(2, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 ioctl(2, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 rt_sigaction(SIGHUP, {0x1, [HUP], SA_RESTORER|SA_RESTART, 0x7f0acf8be560}, {SIG_DFL, [], 0}, 8) = 0 rt_sigaction(SIGHUP, {0x41c8b0, [HUP], SA_RESTORER|SA_RESTART, 0x7f0acf8be560}, {0x1, [HUP], SA_RESTORER|SA_RESTART, 0x7f0acf8be560}, 8) = 0 rt_sigaction(SIGUSR1, {0x41c8b0, [USR1], SA_RESTORER|SA_RESTART, 0x7f0acf8be560}, {SIG_DFL, [], 0}, 8) = 0 rt_sigaction(SIGPIPE, {0x1, [PIPE], SA_RESTORER|SA_RESTART, 0x7f0acf8be560}, {SIG_DFL, [], 0}, 8) = 0 rt_sigaction(SIGWINCH, {0x41d190, [WINCH], SA_RESTORER|SA_RESTART, 0x7f0acf8be560}, {SIG_DFL, [], 0}, 8) = 0 stat("index.html", {st_mode=S_IFREG|0644, st_size=5417, ...}) = 0 stat("index.html.1", 0x7fff502e6fe0) = -1 ENOENT (No such file or directory) stat("index.html.1", 0x7fff502e70d0) = -1 ENOENT (No such file or directory) gettimeofday({1257049713, 677754}, NULL) = 0 open("/etc/localtime", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=118, ...}) = 0 fstat(3, {st_mode=S_IFREG|0644, st_size=118, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0ad04a3000 read(3, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0\1\0\0\0\0"..., 4096) = 118 lseek(3, -62, SEEK_CUR) = 56 read(3, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0\1\0\0\0\0"..., 4096) = 62 close(3) = 0 munmap(0x7f0ad04a3000, 4096) = 0 write(2, "--2009-11-01 04:28:33-- http://"..., 48--2009-11-01 04:28:33-- http://www.google.com/ ) = 48 stat("/home/linux/.netrc", 0x7fff502e6dd0) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en_US.UTF-8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en_US.UTF-8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en_US.UTF-8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en_US.utf8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en_US.utf8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en_US.utf8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en_US/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en_US/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en_US/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en.UTF-8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en.UTF-8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en.UTF-8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en.utf8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en.utf8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en.utf8/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en/LC_MESSAGES/wget.mo", O_RDONLY) = -1 ENOENT (No such file or directory) write(2, "Resolving www.google.com... ", 28Resolving www.google.com... ) = 28 socket(PF_NETLINK, SOCK_RAW, 0) = 3 bind(3, {sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 0 getsockname(3, {sa_family=AF_NETLINK, pid=12458, groups=00000000}, [12]) = 0 gettimeofday({1257049713, 679554}, NULL) = 0 sendto(3, "\24\0\0\0\26\0\1\3q\16\355J\0\0\0\0\0\0\0\0", 20, 0, {sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 20 recvmsg(3, {msg_name(12)={sa_family=AF_NETLINK, pid=0, groups=00000000}, msg_iov(1)=[{"8\0\0\0\24\0\2\0q\16\355J\2520\0\0\2\10\200\376\1\0\0\0\10\0\1\0\177\0\0\1"..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 172 recvmsg(3, {msg_name(12)={sa_family=AF_NETLINK, pid=0, groups=00000000}, msg_iov(1)=[{"@\0\0\0\24\0\2\0q\16\355J\2520\0\0\n\200\200\376\1\0\0\0\24\0\1\0\0\0\0\0"..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 128 recvmsg(3, {msg_name(12)={sa_family=AF_NETLINK, pid=0, groups=00000000}, msg_iov(1)=[{"\24\0\0\0\3\0\2\0q\16\355J\2520\0\0\0\0\0\0\1\0\0\0\24\0\1\0\0\0\0\0"..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 20 close(3) = 0 socket(PF_FILE, 0x80801 /* SOCK_??? */, 0) = 3 connect(3, {sa_family=AF_FILE, path="/var/run/nscd/socket"}, 110) = 0 sendto(3, "\2\0\0\0\r\0\0\0\6\0\0\0hosts\0", 18, MSG_NOSIGNAL, NULL, 0) = 18 poll([{fd=3, events=POLLIN|POLLERR|POLLHUP}], 1, 5000) = 1 ([{fd=3, revents=POLLIN|POLLHUP}]) recvmsg(3, {msg_name(0)=NULL, msg_iov(2)=[{"\321h\301\317\0\0", 6}, {"\340\274\213\317\n\177\0\0", 8}], msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_CMSG_CLOEXEC) = 0 close(3) = 0 socket(PF_FILE, 0x80801 /* SOCK_??? */, 0) = 3 connect(3, {sa_family=AF_FILE, path="/var/run/nscd/socket"}, 110) = 0 sendto(3, "\2\0\0\0\16\0\0\0\17\0\0\0www.google.com\0", 27, MSG_NOSIGNAL, NULL, 0) = 27 poll([{fd=3, events=POLLIN|POLLERR|POLLHUP}], 1, 5000) = 1 ([{fd=3, revents=POLLIN}]) read(3, "\2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 24) = 24 close(3) = 0 open("/usr/share/locale-langpack/en_US.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en_US.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en_US.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en_US.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en_US.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en_US.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en_US/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en_US/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en_US/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-langpack/en/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale/en/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/share/locale-bundle/en/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) write(2, "failed: Name or service not know"..., 35failed: Name or service not known. ) = 35 write(2, "wget: unable to resolve host add"..., 54wget: unable to resolve host address `www.google.com' ) = 54 gettimeofday({1257049713, 780570}, NULL) = 0 stat("/etc/localtime", {st_mode=S_IFREG|0644, st_size=118, ...}) = 0 close(2) = 0 exit_group(1) = ? 3.4 /etc/resolv.conf nameserver 192.168.0.1 Ciao
Oh. So what's going on I think is that unscd actually doesn't cope with this case well, since it does each resolution in a sub-process and thus the fact that the DNS server is broken is never shared between the sub-processes - bad that I didn't actually realize that earlier. :-( There are two basic ways to fix this, one is to randomly resolve a certain hostname within the main program (probably in a parallel thread, which would mean adding some threading after all), or copying acquired resolver settings along the reply from the sub-process (which would probably be heavily glibc-specific, but I'm not sure yet). Hopefully either way will not be too big change...
*** Bug 547658 has been marked as a duplicate of this bug. ***
Good Petr! Sorry I did not place the strace as attachment, I was so tired that day and I wanted to reply asap. If you need any info let me know it.
Another workaround! This is how to be able to use the knetworkmanger 1. R click on the knetworkmanager on the system tray 2. Manage Connection/Wireless/Edit/IP Adress 3. Configure dropdown menu and select <Automatic (DHCP) adress only> 4. Add the DNS servers 5. OK For the wired connection I have to create a new connection and make it active and of course do similar changes as the one for the wireless. -=terry=-
*** Bug 618050 has been marked as a duplicate of this bug. ***
unscd has been dropped.