all,
i'm having serious problems getting amanda to function on a server
running xinetd. the amanda setup on this particular box runs fine with
inetd, but i cannot get xinetd to cooperate with me.
the skinny:
upon amcheck, xinetd attempts to spawn 25 amandad processes,
generating 25 pairs of START/FAIL lines in my logs. after the 25
attempts, xinetd disables the service.
amanda functions as expected under inetd.
the error reported by amcheck:
WARNING: copernicus.sheergenius.com: selfcheck request timed out. Host
down?
my xinetd entry:
service amanda
{
protocol = udp
socket_type = dgram
wait = yes
user = amanda
group = disk
groups = yes
server = /usr/local/libexec/amandad
server_args = amandad
}
my .amandahosts file has appropriate entries and is 0600. stracing
xinetd gives me much information, but no leads. strace output,
verbatim, from xinetd's socket() call amandad's exit() call, follows:
* note that, for tracing purposes, i changed user/group to root/root
for the service so that ptrace() would attach to the new process.
enlighten me if there is a safe way to follow processes across
forks() that are setuid() under linux.
* aaa.bbb.ccc.ddd references the amanda server in question;
www.xxx.yyy.zzz references the dns server
[pid 27743] socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP) = 5
[pid 27743] fcntl64(5, F_SETFD, FD_CLOEXEC) = 0
[pid 27743] setsockopt(5, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
[pid 27743] bind(5, {sin_family=AF_INET, sin_port=htons(10080),
sin_addr=inet_addr("0.0.0.0")}}, 16) = 0
[pid 27743] socket(PF_INET, SOCK_STREAM, IPPROTO_TCP) = 6
[pid 27743] fcntl64(6, F_SETFD, FD_CLOEXEC) = 0
[pid 27743] setsockopt(6, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
[pid 27743] bind(6, {sin_family=AF_INET, sin_port=htons(901),
sin_addr=inet_addr("0.0.0.0")}}, 16) = 0
[pid 27743] listen(6, 7) = 0
[pid 27743] chdir("/") = 0
[pid 27743] time([1055179791]) = 1055179791
[pid 27743] getpid() = 27743
[pid 27743] rt_sigaction(SIGPIPE, {0x401592c0, [], 0x4000000}, {SIG_IGN},
8) = 0 [pid 27743] send(7, "<29>Jun 9 12:29:51 xinetd[27743"..., 108, 0) =
108
[pid 27743] rt_sigaction(SIGPIPE, {SIG_IGN}, NULL, 8) = 0
[pid 27743] time([1055179791]) = 1055179791
[pid 27743] getpid() = 27743
[pid 27743] rt_sigaction(SIGPIPE, {0x401592c0, [], 0x4000000}, {SIG_IGN},
8) = 0
[pid 27743] send(7, "<29>Jun 9 12:29:51 xinetd[27743"..., 72, 0) = 72
[pid 27743] rt_sigaction(SIGPIPE, {SIG_IGN}, NULL, 8) = 0
[pid 27743] time([1055179791]) = 1055179791
[pid 27743] getpid() = 27743
[pid 27743] rt_sigaction(SIGPIPE, {0x401592c0, [], 0x4000000}, {SIG_IGN},
8) = 0
[pid 27743] send(7, "<29>Jun 9 12:29:51 xinetd[27743"..., 72, 0) = 72
[pid 27743] rt_sigaction(SIGPIPE, {SIG_IGN}, NULL, 8) = 0
[pid 27743] rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
[pid 27743] select(7, [3 5 6], NULL, NULL, NULL <unfinished ...>
[pid 27742] <... nanosleep resumed> {3, 0}) = 0
[pid 27742] _exit(0) = ?
<... select resumed> ) = 1 (in [5])
recvfrom(5, "A", 1, MSG_PEEK, {sin_family=AF_INET, sin_port=htons(647),
sin_addr=inet_addr("aaa.bbb.ccc.ddd")}}, [16]) = 1
time(NULL) = 1055179822
fork() = 27764
[pid 27764] rt_sigaction(SIGPIPE, {SIG_DFL}, {SIG_IGN}, 8) = 0
[pid 27764] rt_sigaction(SIGTSTP, {SIG_DFL}, {SIG_IGN}, 8) = 0
[pid 27764] rt_sigaction(SIGTTIN, {SIG_DFL}, {SIG_IGN}, 8) = 0
[pid 27764] rt_sigaction(SIGTTOU, {SIG_DFL}, {SIG_IGN}, 8) = 0
[pid 27764] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid 27764] close(3) = 0
[pid 27764] close(4) = 0
[pid 27764] close(0) = 0
[pid 27764] close(1) = 0
[pid 27764] close(2) = 0
[pid 27764] setgid32(0) = 0
[pid 27764] open("/etc/passwd", O_RDONLY) = 0
[pid 27764] fcntl64(0, F_GETFD) = 0
[pid 27764] fcntl64(0, F_SETFD, FD_CLOEXEC) = 0
[pid 27764] fstat64(0, {st_mode=S_IFREG|0644, st_size=3196, ...}) = 0
[pid 27764] mmap2(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40014000
[pid 27764] _llseek(0, 0, [0], SEEK_CUR) = 0
[pid 27764] read(0, "root:x:0:0:root:/root:/bin/bash\n"..., 4096) = 3196
[pid 27764] close(0) = 0
[pid 27764] munmap(0x40014000, 4096) = 0
[pid 27764] open("/etc/group", O_RDONLY <unfinished ...>
[pid 27743] time( <unfinished ...>
[pid 27764] <... open resumed> ) = 0
[pid 27743] <... time resumed> [1055179822]) = 1055179822
[pid 27764] fcntl64(0, F_GETFD <unfinished ...>
[pid 27743] time( <unfinished ...>
[pid 27764] <... fcntl64 resumed> ) = 0
[pid 27743] <... time resumed> [1055179822]) = 1055179822
[pid 27764] fcntl64(0, F_SETFD, FD_CLOEXEC <unfinished ...>
[pid 27743] getpid( <unfinished ...>
[pid 27764] <... fcntl64 resumed> ) = 0
[pid 27743] <... getpid resumed> ) = 27743
[pid 27764] fstat64(0, <unfinished ...>
[pid 27743] rt_sigaction(SIGPIPE, {0x401592c0, [], 0x4000000},
<unfinished ...>
[pid 27764] <... fstat64 resumed> {st_mode=S_IFREG|0644, st_size=1057,
...}) = 0
[pid 27743] <... rt_sigaction resumed> {SIG_IGN}, 8) = 0
[pid 27764] mmap2(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 <unfinished ...>
[pid 27743] send(7, "<86>Jun 9 12:30:22 xinetd[27743"..., 78, 0
<unfinished ...>
[pid 27764] <... mmap2 resumed> ) = 0x40014000
[pid 27743] <... send resumed> ) = 78
[pid 27764] _llseek(0, 0, <unfinished ...>
[pid 27743] rt_sigaction(SIGPIPE, {SIG_IGN}, <unfinished ...>
[pid 27764] <... _llseek resumed> [0], SEEK_CUR) = 0
[pid 27743] <... rt_sigaction resumed> NULL, 8) = 0
[pid 27764] read(0, <unfinished ...>
[pid 27743] select(7, [3 6], NULL, NULL, NULL <unfinished ...>
[pid 27764] <... read resumed> "root::0:root\nbin::1:root,bin,dae"...,
4096) = 1057
[pid 27764] read(0, "", 4096) = 0
[pid 27764] close(0) = 0
[pid 27764] munmap(0x40014000, 4096) = 0
[pid 27764] setgroups32(0xb, 0x8087340) = 0
[pid 27764] setuid32(0) = 0
[pid 27764] socket(PF_UNIX, SOCK_STREAM, 0) = 0
[pid 27764] connect(0, {sin_family=AF_UNIX, path="/var/run/.nscd_socket"},
110) = -1 ENOENT (No such file or directory)
[pid 27764] close(0) = 0
[pid 27764] open("/etc/hosts", O_RDONLY) = 0
[pid 27764] fcntl64(0, F_GETFD) = 0
[pid 27764] fcntl64(0, F_SETFD, FD_CLOEXEC) = 0
[pid 27764] fstat64(0, {st_mode=S_IFREG|0644, st_size=553, ...}) = 0
[pid 27764] mmap2(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40014000
[pid 27764] read(0, "# /etc/hosts: This file describ"..., 4096) = 553
[pid 27764] read(0, "", 4096) = 0
[pid 27764] close(0) = 0
[pid 27764] munmap(0x40014000, 4096) = 0
[pid 27764] socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 0
[pid 27764] connect(0, {sin_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("www.xxx.yyy.zzz")}}, 28) = 0
[pid 27764] send(0,
"Il\1\0\0\1\0\0\0\0\0\0\003141\00259\003149\003209\7in-"..., 45, 0) = 45
[pid 27764] gettimeofday({1055179822, 161471}, NULL) = 0
[pid 27764] poll([{fd=0, events=POLLIN, revents=POLLIN}], 1, 5000) = 1
[pid 27764] recvfrom(0,
"Il\201\200\0\1\0\1\0\2\0\0\003141\00259\003149\003209\7"..., 65536, 0,
{sin_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("www.xxx.yyy.zzz")}}, [16]) = 128
[pid 27764] close(0) = 0
[pid 27764] time([1055179822]) = 1055179822
[pid 27764] time([1055179822]) = 1055179822
[pid 27764] getpid() = 27764
[pid 27764] rt_sigaction(SIGPIPE, {0x401592c0, [], 0x4000000}, {SIG_DFL},
8) = 0
[pid 27764] send(7, "<86>Jun 9 12:30:22 xinetd[27764"..., 75, 0) = 75
[pid 27764] rt_sigaction(SIGPIPE, {SIG_DFL}, NULL, 8) = 0
[pid 27764] _exit(0)
the last syscall of note is the recvfrom() call to the dns server. the
hostname in .amandahosts is correct.
no files are generated in /tmp/amanda (in fact, the directory is not
even created, amanda/disk or root/root). i've been banging my head
against a solid brick wall for weeks regarding this issue. any ideas
are greatly appreciated.
-mike
------------------------------------------------------------------------
/~\ the ascii "life would be so much easier if we
\ / ribbon campaign could just look at the source code"
X against html -- dave olson
/ \ email!
|
