int main (int argc, char const *const *argv, char const *const *envp)
{
unsigned int backlog = 20 ;
int flagreuse = 1 ;
PROG = "s6-ipcserver-socketbinder" ;
{
subgetopt_t l = SUBGETOPT_ZERO ;
for (;;)
{
register int opt = subgetopt_r(argc, argv, "Ddb:", &l) ;
if (opt == -1) break ;
switch (opt)
{
case 'D' : flagreuse = 0 ; break ;
case 'd' : flagreuse = 1 ; break ;
case 'b' : if (!uint0_scan(l.arg, &backlog)) dieusage() ; break ;
default : dieusage() ;
}
}
argc -= l.ind ; argv += l.ind ;
}
if (argc < 2) dieusage() ;
close(0) ;
if (ipc_stream()) strerr_diefu1sys(111, "create socket") ;
{
mode_t m = umask(0) ;
if ((flagreuse ? ipc_bind_reuse(0, argv[0]) : ipc_bind(0, argv[0])) < 0)
strerr_diefu2sys(111, "bind to ", argv[0]) ;
umask(m) ;
}
if (ipc_listen(0, backlog) < 0) strerr_diefu2sys(111, "listen to ", argv[0]) ;
pathexec_run(argv[1], argv + 1, envp) ;
strerr_dieexec(111, argv[1]) ;
}
int ipc_bind_reuse (int s, char const *p)
{
unsigned int opt = 1 ;
setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof opt) ;
unlink(p) ;
return ipc_bind(s, p) ;
}
