X-Git-Url: https://arthur.barton.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=etc%2Fafpd%2Fmain.c;h=edcfe6a7565d8339e5239b8ecead0a39fb66a821;hb=b1de2399f759e2e5b2c9b8b32087fea98a030833;hp=6fa49cf4017f07919ff84e55ddc14c0d42f82049;hpb=d28f176330075b2789ce4d50a64fc3fe5d6bbe9b;p=netatalk.git diff --git a/etc/afpd/main.c b/etc/afpd/main.c index 6fa49cf4..edcfe6a7 100644 --- a/etc/afpd/main.c +++ b/etc/afpd/main.c @@ -20,6 +20,7 @@ #include #include #include +#include #include @@ -33,8 +34,8 @@ #include #include #include +#include -#include "globals.h" #include "afp_config.h" #include "status.h" #include "fork.h" @@ -50,19 +51,22 @@ static int argc = 0; static char **argv = NULL; #endif /* TRU64 */ -unsigned char nologin = 0; +#define AFP_LISTENERS 32 +#define FDSET_SAFETY 5 +unsigned char nologin = 0; struct afp_options default_options; static AFPConfig *configs; static server_child *server_children; static sig_atomic_t reloadconfig = 0; +static sig_atomic_t gotsigchld = 0; /* Two pointers to dynamic allocated arrays which store pollfds and associated data */ static struct pollfd *fdset; static struct polldata *polldata; static int fdset_size; /* current allocated size */ static int fdset_used; /* number of used elements */ - +static int disasociated_ipc_fd; /* disasociated sessions uses this fd for IPC */ #ifdef TRU64 void afp_get_cmdline( int *ac, char ***av) @@ -91,8 +95,25 @@ static void fd_set_listening_sockets(void) for (config = configs; config; config = config->next) { if (config->fd < 0) /* for proxies */ continue; - fdset_add_fd(&fdset, &polldata, &fdset_used, &fdset_size, config->fd, LISTEN_FD, config); + fdset_add_fd(default_options.connections + AFP_LISTENERS + FDSET_SAFETY, + &fdset, + &polldata, + &fdset_used, + &fdset_size, + config->fd, + LISTEN_FD, + config); } + + if (default_options.flags & OPTION_KEEPSESSIONS) + fdset_add_fd(default_options.connections + AFP_LISTENERS + FDSET_SAFETY, + &fdset, + &polldata, + &fdset_used, + &fdset_size, + disasociated_ipc_fd, + DISASOCIATED_IPC_FD, + NULL); } static void fd_reset_listening_sockets(void) @@ -104,25 +125,40 @@ static void fd_reset_listening_sockets(void) continue; fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, config->fd); } - fd_set_listening_sockets(); + + if (default_options.flags & OPTION_KEEPSESSIONS) + fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, disasociated_ipc_fd); } /* ------------------ */ static void afp_goaway(int sig) { + AFPConfig *config; #ifndef NO_DDP asp_kill(sig); #endif /* ! NO_DDP */ - if (server_children) - server_child_kill(server_children, CHILD_DSIFORK, sig); - switch( sig ) { - case SIGTERM : - LOG(log_note, logtype_afpd, "AFP Server shutting down on SIGTERM"); - AFPConfig *config; + case SIGTERM: + case SIGQUIT: + switch (sig) { + case SIGTERM: + LOG(log_note, logtype_afpd, "AFP Server shutting down on SIGTERM"); + break; + case SIGQUIT: + if (default_options.flags & OPTION_KEEPSESSIONS) { + LOG(log_note, logtype_afpd, "AFP Server shutting down on SIGQUIT, NOT disconnecting clients"); + } else { + LOG(log_note, logtype_afpd, "AFP Server shutting down on SIGQUIT"); + sig = SIGTERM; + } + break; + } + if (server_children) + server_child_kill(server_children, CHILD_DSIFORK, sig); + for (config = configs; config; config = config->next) if (config->server_cleanup) config->server_cleanup(config); @@ -134,6 +170,9 @@ static void afp_goaway(int sig) nologin++; auth_unload(); LOG(log_info, logtype_afpd, "disallowing logins"); + + if (server_children) + server_child_kill(server_children, CHILD_DSIFORK, sig); break; case SIGHUP : @@ -141,13 +180,18 @@ static void afp_goaway(int sig) reloadconfig = 1; break; + case SIGCHLD: + /* w/ a configuration file, we can force a re-read if we want */ + gotsigchld = 1; + break; + default : LOG(log_error, logtype_afpd, "afp_goaway: bad signal" ); } return; } -static void child_handler(int sig _U_) +static void child_handler(void) { int fd; int status, i; @@ -179,6 +223,26 @@ static void child_handler(int sig _U_) } } +static int setlimits(void) +{ + struct rlimit rlim; + + if (getrlimit(RLIMIT_NOFILE, &rlim) != 0) { + LOG(log_warning, logtype_afpd, "setlimits: reading current limits failed: %s", strerror(errno)); + return -1; + } + if (rlim.rlim_cur != RLIM_INFINITY && rlim.rlim_cur < 65535) { + rlim.rlim_cur = 65535; + if (rlim.rlim_max != RLIM_INFINITY && rlim.rlim_max < 65535) + rlim.rlim_max = 65535; + if (setrlimit(RLIMIT_NOFILE, &rlim) != 0) { + LOG(log_warning, logtype_afpd, "setlimits: increasing limits failed: %s", strerror(errno)); + return -1; + } + } + return 0; +} + int main(int ac, char **av) { AFPConfig *config; @@ -194,29 +258,30 @@ int main(int ac, char **av) set_auth_parameters( ac, av ); #endif /* TRU64 */ + /* Parse argv args and initialize default options */ + afp_options_init(&default_options); + if (!afp_options_parse(ac, av, &default_options)) + exit(EXITERR_CONF); + + if (check_lockfile("afpd", default_options.pidfile) != 0) + exit(EXITERR_SYS); + + if (!(default_options.flags & OPTION_DEBUG) && (daemonize(0, 0) != 0)) + exit(EXITERR_SYS); + + if (create_lockfile("afpd", default_options.pidfile) != 0) + exit(EXITERR_SYS); + /* Log SIGBUS/SIGSEGV SBT */ fault_setup(NULL); /* Default log setup: log to syslog */ + set_processname("afpd"); setuplog("default log_note"); - afp_options_init(&default_options); - if (!afp_options_parse(ac, av, &default_options)) - exit(EXITERR_CONF); - - /* Save the user's current umask for use with CNID (and maybe some - * other things, too). */ + /* Save the user's current umask */ default_options.save_mask = umask( default_options.umask ); - switch(server_lock("afpd", default_options.pidfile, - default_options.flags & OPTION_DEBUG)) { - case -1: /* error */ - exit(EXITERR_SYS); - case 0: /* child */ - break; - default: /* server */ - exit(0); - } atexit(afp_exit); /* install child handler for asp and dsi. we do this before afp_goaway @@ -229,7 +294,6 @@ int main(int ac, char **av) } memset(&sv, 0, sizeof(sv)); -#ifdef AFP3x /* linux at least up to 2.4.22 send a SIGXFZ for vfat fs, even if the file is open with O_LARGEFILE ! */ #ifdef SIGXFSZ @@ -239,28 +303,28 @@ int main(int ac, char **av) LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) ); exit(EXITERR_SYS); } -#endif #endif - sv.sa_handler = child_handler; + sv.sa_handler = afp_goaway; /* handler for all sigs */ + sigemptyset( &sv.sa_mask ); sigaddset(&sv.sa_mask, SIGALRM); sigaddset(&sv.sa_mask, SIGHUP); sigaddset(&sv.sa_mask, SIGTERM); sigaddset(&sv.sa_mask, SIGUSR1); - + sigaddset(&sv.sa_mask, SIGQUIT); sv.sa_flags = SA_RESTART; if ( sigaction( SIGCHLD, &sv, NULL ) < 0 ) { LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) ); exit(EXITERR_SYS); } - sv.sa_handler = afp_goaway; sigemptyset( &sv.sa_mask ); sigaddset(&sv.sa_mask, SIGALRM); sigaddset(&sv.sa_mask, SIGTERM); sigaddset(&sv.sa_mask, SIGHUP); sigaddset(&sv.sa_mask, SIGCHLD); + sigaddset(&sv.sa_mask, SIGQUIT); sv.sa_flags = SA_RESTART; if ( sigaction( SIGUSR1, &sv, NULL ) < 0 ) { LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) ); @@ -272,6 +336,7 @@ int main(int ac, char **av) sigaddset(&sv.sa_mask, SIGTERM); sigaddset(&sv.sa_mask, SIGUSR1); sigaddset(&sv.sa_mask, SIGCHLD); + sigaddset(&sv.sa_mask, SIGQUIT); sv.sa_flags = SA_RESTART; if ( sigaction( SIGHUP, &sv, NULL ) < 0 ) { LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) ); @@ -284,12 +349,25 @@ int main(int ac, char **av) sigaddset(&sv.sa_mask, SIGHUP); sigaddset(&sv.sa_mask, SIGUSR1); sigaddset(&sv.sa_mask, SIGCHLD); + sigaddset(&sv.sa_mask, SIGQUIT); sv.sa_flags = SA_RESTART; if ( sigaction( SIGTERM, &sv, NULL ) < 0 ) { LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) ); exit(EXITERR_SYS); } + sigemptyset( &sv.sa_mask ); + sigaddset(&sv.sa_mask, SIGALRM); + sigaddset(&sv.sa_mask, SIGHUP); + sigaddset(&sv.sa_mask, SIGUSR1); + sigaddset(&sv.sa_mask, SIGCHLD); + sigaddset(&sv.sa_mask, SIGTERM); + sv.sa_flags = SA_RESTART; + if (sigaction(SIGQUIT, &sv, NULL ) < 0 ) { + LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) ); + exit(EXITERR_SYS); + } + /* afpd.conf: not in config file: lockfile, connections, configfile * preference: command-line provides defaults. * config file over-writes defaults. @@ -319,9 +397,21 @@ int main(int ac, char **av) cnid_init(); /* watch atp, dsi sockets and ipc parent/child file descriptor. */ + + if (default_options.flags & OPTION_KEEPSESSIONS) { + LOG(log_note, logtype_afpd, "Activating continous service"); + disasociated_ipc_fd = ipc_server_uds(_PATH_AFP_IPC); + } + fd_set_listening_sockets(); + /* set limits */ + (void)setlimits(); + afp_child_t *child; + int fd[2]; /* we only use one, but server_child_add expects [2] */ + pid_t pid; + int saveerrno; /* wait for an appleshare connection. parent remains in the loop * while the children get handled by afp_over_{asp,dsi}. this is @@ -334,11 +424,18 @@ int main(int ac, char **av) pthread_sigmask(SIG_UNBLOCK, &sigs, NULL); ret = poll(fdset, fdset_used, -1); pthread_sigmask(SIG_BLOCK, &sigs, NULL); - int saveerrno = errno; + saveerrno = errno; + + if (gotsigchld) { + gotsigchld = 0; + child_handler(); + continue; + } if (reloadconfig) { nologin++; auth_unload(); + fd_reset_listening_sockets(); LOG(log_info, logtype_afpd, "re-reading configuration file"); for (config = configs; config; config = config->next) @@ -352,10 +449,13 @@ int main(int ac, char **av) LOG(log_error, logtype_afpd, "config re-read: no servers configured"); exit(EXITERR_CONF); } - fd_reset_listening_sockets(); + + fd_set_listening_sockets(); + nologin = 0; reloadconfig = 0; errno = saveerrno; + continue; } if (ret == 0) @@ -369,25 +469,68 @@ int main(int ac, char **av) } for (int i = 0; i < fdset_used; i++) { - if (fdset[i].revents & POLLIN) { + if (fdset[i].revents & (POLLIN | POLLERR | POLLHUP)) { switch (polldata[i].fdtype) { + case LISTEN_FD: config = (AFPConfig *)polldata[i].data; /* config->server_start is afp_config.c:dsi_start() for DSI */ if (child = config->server_start(config, configs, server_children)) { /* Add IPC fd to select fd set */ - fdset_add_fd(&fdset, &polldata, &fdset_used, &fdset_size, child->ipc_fds[0], IPC_FD, child); + fdset_add_fd(default_options.connections + AFP_LISTENERS + FDSET_SAFETY, + &fdset, + &polldata, + &fdset_used, + &fdset_size, + child->ipc_fds[0], + IPC_FD, + child); } break; + case IPC_FD: child = (afp_child_t *)polldata[i].data; LOG(log_debug, logtype_afpd, "main: IPC request from child[%u]", child->pid); - if ((ret = ipc_server_read(server_children, child->ipc_fds[0])) == 0) { + + if (ipc_server_read(server_children, child->ipc_fds[0]) != 0) { fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, child->ipc_fds[0]); close(child->ipc_fds[0]); child->ipc_fds[0] = -1; + if ((default_options.flags & OPTION_KEEPSESSIONS) && child->disasociated) { + LOG(log_note, logtype_afpd, "main: removing reattached child[%u]", child->pid); + server_child_remove(server_children, CHILD_DSIFORK, child->pid); + } + } + break; + + case DISASOCIATED_IPC_FD: + LOG(log_debug, logtype_afpd, "main: IPC reconnect request"); + if ((fd[0] = accept(disasociated_ipc_fd, NULL, NULL)) == -1) { + LOG(log_error, logtype_afpd, "main: accept: %s", strerror(errno)); + break; + } + if (readt(fd[0], &pid, sizeof(pid_t), 0, 1) != sizeof(pid_t)) { + LOG(log_error, logtype_afpd, "main: readt: %s", strerror(errno)); + close(fd[0]); + break; } + LOG(log_note, logtype_afpd, "main: IPC reconnect from pid [%u]", pid); + if ((child = server_child_add(server_children, CHILD_DSIFORK, pid, fd)) == NULL) { + LOG(log_error, logtype_afpd, "main: server_child_add"); + close(fd[0]); + break; + } + child->disasociated = 1; + fdset_add_fd(default_options.connections + AFP_LISTENERS + FDSET_SAFETY, + &fdset, + &polldata, + &fdset_used, + &fdset_size, + fd[0], + IPC_FD, + child); break; + default: LOG(log_debug, logtype_afpd, "main: IPC request for unknown type"); break;