[pkg-lighttpd] Bug#564556: Bug#564556: lighttpd: can't bind to port: :: 80 Address already in use

[Jonathan Nieder]

Olaf van der Spek wrote:

> Lighttpd actually sets v6only = 1 itself (AFAIK) now.

Hmm, right (r2758: bind to IPV6-only if ipv6 address was specified).

> Could you try with a clean conf and post a strace of the error?

 $ ltrace lighttpd -f /etc/lighttpd/lighttpd.conf
...
 memcpy(0x081319b0, ":80", 3)                     = 0x081319b0
 strrchr(":80", ':')                              = ":80"
 strtol(0x81319b1, 0, 10, 0xb7584ff4, 0xb75863a0) = 80
 socket(2, 1, 6)                                  = 4
 fcntl(4, 2, 1, 0xb7584ff4, 0xb75863a0)           = 0
 setsockopt(4, 1, 2, 0xbfa119fc, 4)               = 0
 bind(4, 0x81318c8, 16, 0xbfa119fc, 4)            = -1
...

So: use_ipv6 is not 1 because host_token has no [::] for some reason.

Extract from strace follows.

 # dpkg --purge lighttpd
 # dpkg --install /var/cache/apt/archives/lighttpd_1.4.28-1_i386.deb
...
 Errors were encountered while processing:
  lighttpd
 # strace -f /var/lib/dpkg/info/lighttpd.postinst configure
...
 socket(PF_INET6, SOCK_STREAM, IPPROTO_IP) = 3
 ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, 0xbf84d648) = -1 EINVAL (Invalid argument)
 _llseek(3, 0, 0xbf84d690, SEEK_CUR) = -1 ESPIPE (Illegal seek)
 ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, 0xbf84d648) = -1 EINVAL (Invalid argument)
 _llseek(3, 0, 0xbf84d690, SEEK_CUR) = -1 ESPIPE (Illegal seek)
 fcntl64(3, F_SETFD, FD_CLOEXEC) = 0
 close(3)                    = 0
 write(1, "$SERVER[\"socket\"] == \"[::]:80\" {"..., 35) = 35
...
 munmap(0xb725d000, 89487)   = 0
 open("/etc/passwd", O_RDONLY|O_CLOEXEC) = 4
 fcntl64(4, F_GETFD)         = 0x1 (flags FD_CLOEXEC)
 _llseek(4, 0, [0], SEEK_CUR) = 0
 fstat64(4, {st_mode=S_IFREG|0644, st_size=1199, ...}) = 0
 mmap2(NULL, 1199, PROT_READ, MAP_SHARED, 4, 0) = 0xb7719000
 _llseek(4, 1199, [1199], SEEK_SET) = 0
 munmap(0xb7719000, 1199)    = 0
 close(4)                    = 0
 socket(PF_FILE, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 4
 connect(4, {sa_family=AF_FILE, path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory)
 close(4)                    = 0
 socket(PF_FILE, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 4
 connect(4, {sa_family=AF_FILE, path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory)
 close(4)                    = 0
 open("/etc/group", O_RDONLY|O_CLOEXEC) = 4
 _llseek(4, 0, [0], SEEK_CUR) = 0
 fstat64(4, {st_mode=S_IFREG|0644, st_size=702, ...}) = 0
 mmap2(NULL, 702, PROT_READ, MAP_SHARED, 4, 0) = 0xb7719000
 _llseek(4, 702, [702], SEEK_SET) = 0
 munmap(0xb7719000, 702)     = 0
 close(4)                    = 0
 socket(PF_INET, SOCK_STREAM, IPPROTO_TCP) = 4
 fcntl64(4, F_SETFD, FD_CLOEXEC) = 0
 setsockopt(4, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
 bind(4, {sa_family=AF_INET, sin_port=htons(80), sin_addr=inet_addr("0.0.0.0")}, 16) = -1 EADDRINUSE (Address already in use)
...