On Tue, Mar 05, 2013 at 08:59:09PM +0100, Hartmann, O. wrote: > A "truss top" reveals this, is this of help? > [...] > stat("/etc/nsswitch.conf",{ mode=-rw-r--r-- > ,inode=162310,size=1007,blksize=32768 }) = 0 (0x0) > stat("/etc/nsswitch.conf",{ mode=-rw-r--r-- > ,inode=162310,size=1007,blksize=32768 }) = 0 (0x0) > stat("/etc/nsswitch.conf",{ mode=-rw-r--r-- > ,inode=162310,size=1007,blksize=32768 }) = 0 (0x0) > stat("/etc/nsswitch.conf",{ mode=-rw-r--r-- > ,inode=162310,size=1007,blksize=32768 }) = 0 (0x0) > stat("/etc/nsswitch.conf",{ mode=-rw-r--r-- > ,inode=162310,size=1007,blksize=32768 }) = 0 (0x0) > socket(PF_LOCAL,SOCK_STREAM,0) = 4 (0x4) > connect(4,{ AF_UNIX "/var/run/nscd" },15) = 0 (0x0) > fcntl(4,F_SETFL,O_NONBLOCK) = 0 (0x0) > kqueue(0x80183b000,0x80122fc58,0x10,0x80062b308,0x80183b010,0x2) = 5 (0x5) > kevent(5,{0x4,EVFILT_WRITE,EV_ADD,0,0x0,0x0},1,0x0,0,0x0) = 0 (0x0) > kqueue(0x5,0x7fffffffd2e0,0x1,0x0,0x0,0x0) = 6 (0x6) > kevent(6,{0x4,EVFILT_READ,EV_ADD,0,0x0,0x0},1,0x0,0,0x0) = 0 (0x0) > kevent(5,{0x4,EVFILT_WRITE,EV_ADD,1,0x4,0x0},1,0x0,0,0x0) = 0 (0x0) > kevent(5,0x0,0,{0x4,EVFILT_WRITE,EV_EOF,0,0x2000,0x0},1,0x0) = 1 (0x1) > sendmsg(0x4,0x7fffffffd290,0x0,0x1,0x1,0x0) ERR#32 'Broken pipe' > SIGNAL 13 (SIGPIPE) > process exit, rval = 0 Apparently there is a bug that causes nscd to close the connection immediately but even then it is wrong that this terminates the calling program with SIGPIPE. The below patch prevents the SIGPIPE but cannot revive the connection to nscd. This may cause numeric UIDs in top or increase the load on the directory server. It is compile tested only. Index: lib/libc/net/nscachedcli.c =================================================================== --- lib/libc/net/nscachedcli.c (revision 247710) +++ lib/libc/net/nscachedcli.c (working copy) _at__at_ -75,9 +75,9 _at__at_ nevents = _kevent(connection->write_queue, NULL, 0, &eventlist, 1, &timeout); if ((nevents == 1) && (eventlist.filter == EVFILT_WRITE)) { - s_result = _write(connection->sockfd, data + result, + s_result = send(connection->sockfd, data + result, eventlist.data < data_size - result ? - eventlist.data : data_size - result); + eventlist.data : data_size - result, MSG_NOSIGNAL); if (s_result == -1) return (-1); else _at__at_ -175,8 +175,8 _at__at_ nevents = _kevent(connection->write_queue, NULL, 0, &eventlist, 1, NULL); if (nevents == 1 && eventlist.filter == EVFILT_WRITE) { - result = (_sendmsg(connection->sockfd, &cred_hdr, 0) == -1) ? - -1 : 0; + result = (_sendmsg(connection->sockfd, &cred_hdr, + MSG_NOSIGNAL) == -1) ? -1 : 0; EV_SET(&eventlist, connection->sockfd, EVFILT_WRITE, EV_ADD, 0, 0, NULL); _kevent(connection->write_queue, &eventlist, 1, NULL, 0, NULL); -- Jilles TjoelkerReceived on Wed Mar 06 2013 - 20:24:10 UTC
This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:40:35 UTC