X-Git-Url: https://arthur.barton.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=etc%2Fafpd%2Fmain.c;h=68785537e3d7c945e7035577989a5aa3e73a47f7;hb=b0bcb8f6b0571592a50ce039882c9319e012a270;hp=434ca5ad173fc58f78e4dc50117975cba36d16d2;hpb=7952e70aaf2ed18f2225f6f15d3ac2d2c68b4053;p=netatalk.git diff --git a/etc/afpd/main.c b/etc/afpd/main.c index 434ca5ad..68785537 100644 --- a/etc/afpd/main.c +++ b/etc/afpd/main.c @@ -1,6 +1,4 @@ /* - * $Id: main.c,v 1.10 2001-06-25 15:18:01 rufustfirefly Exp $ - * * Copyright (c) 1990,1993 Regents of The University of Michigan. * All Rights Reserved. See COPYRIGHT. */ @@ -12,41 +10,38 @@ #include #include #include -#ifdef HAVE_UNISTD_H -#include -#endif /* HAVE_UNISTD_H */ -#ifdef HAVE_FCNTL_H -#include -#endif /* HAVE_FCNTL_H */ #include - -#include -#include #include #include -#include #include #include - +#include #include +#include +#include -#include -#include +#include +#include #include #include -#include -#include #include -#include #include #include #include +#include +#include +#include +#include + +#include "event2/event.h" +#include "event2/http.h" +#include "event2/rpc.h" -#include "globals.h" #include "afp_config.h" #include "status.h" #include "fork.h" #include "uam_auth.h" +#include "afp_zeroconf.h" #ifdef TRU64 #include @@ -57,96 +52,172 @@ static int argc = 0; static char **argv = NULL; #endif /* TRU64 */ -#ifdef DID_MTAB -#include "parse_mtab.h" -#endif /* DID_MTAB */ - unsigned char nologin = 0; struct afp_options default_options; + static AFPConfig *configs; static server_child *server_children; -static fd_set save_rfds; +static sig_atomic_t reloadconfig = 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) { - *ac = argc; - *av = argv; + *ac = argc; + *av = argv; } #endif /* TRU64 */ -static void afp_exit(const int i) +/* This is registered with atexit() */ +static void afp_exit(void) +{ + if (parent_or_child == 0) + /* Only do this in the parent */ + server_unlock(default_options.pidfile); +} + + +/* ------------------ + initialize fd set we are waiting for. +*/ +static void fd_set_listening_sockets(void) { - server_unlock(default_options.pidfile); - exit(i); + AFPConfig *config; + + 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(&fdset, &polldata, &fdset_used, &fdset_size, disasociated_ipc_fd, DISASOCIATED_IPC_FD, NULL); } + +static void fd_reset_listening_sockets(void) +{ + AFPConfig *config; + for (config = configs; config; config = config->next) { + if (config->fd < 0) /* for proxies */ + continue; + fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, config->fd); + } + fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, disasociated_ipc_fd); +} + +/* ------------------ */ static void afp_goaway(int sig) { -#ifndef NO_DDP - asp_kill(sig); -#endif /* ! NO_DDP */ - dsi_kill(sig); + AFPConfig *config; + switch( sig ) { - case SIGTERM : - syslog( LOG_INFO, "shutting down on signal %d", sig ); - break; + + case SIGTERM: + case SIGQUIT: + switch (sig) { + case SIGTERM: + LOG(log_note, logtype_afpd, "AFP Server shutting down on SIGTERM"); + break; + case SIGQUIT: + LOG(log_note, logtype_afpd, "AFP Server shutting down on SIGQUIT, NOT disconnecting clients"); + 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); + server_unlock(default_options.pidfile); + exit(0); + break; + + case SIGUSR1 : + nologin++; + auth_unload(); + LOG(log_info, logtype_afpd, "disallowing logins"); + + if (server_children) + server_child_kill(server_children, CHILD_DSIFORK, sig); + break; + case SIGHUP : - /* w/ a configuration file, we can force a re-read if we want */ - nologin++; - if ((nologin + 1) & 1) { - AFPConfig *config; - - syslog(LOG_INFO, "re-reading configuration file"); - for (config = configs; config; config = config->next) - if (config->server_cleanup) - config->server_cleanup(config); - - configfree(configs, NULL); - if (!(configs = configinit(&default_options))) { - syslog(LOG_ERR, "config re-read: no servers configured"); - afp_exit(1); - } - FD_ZERO(&save_rfds); - for (config = configs; config; config = config->next) { - if (config->fd < 0) - continue; - FD_SET(config->fd, &save_rfds); - } - } else { - syslog(LOG_INFO, "disallowing logins"); - auth_unload(); - } - break; + /* w/ a configuration file, we can force a re-read if we want */ + reloadconfig = 1; + break; + default : - syslog( LOG_ERR, "afp_goaway: bad signal" ); - } - if ( sig == SIGTERM ) { - AFPConfig *config; - - for (config = configs; config; config = config->next) - if (config->server_cleanup) - config->server_cleanup(config); - - afp_exit(0); + LOG(log_error, logtype_afpd, "afp_goaway: bad signal" ); } return; } -static void child_handler() +static void child_handler(int sig _U_) { - server_child_handler(server_children); + int fd; + int status, i; + pid_t pid; + +#ifndef WAIT_ANY +#define WAIT_ANY (-1) +#endif /* ! WAIT_ANY */ + + while ((pid = waitpid(WAIT_ANY, &status, WNOHANG)) > 0) { + for (i = 0; i < server_children->nforks; i++) { + if ((fd = server_child_remove(server_children, i, pid)) != -1) { + fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, fd); + break; + } + } + + if (WIFEXITED(status)) { + if (WEXITSTATUS(status)) + LOG(log_info, logtype_afpd, "child[%d]: exited %d", pid, WEXITSTATUS(status)); + else + LOG(log_info, logtype_afpd, "child[%d]: done", pid); + } else { + if (WIFSIGNALED(status)) + LOG(log_info, logtype_afpd, "child[%d]: killed by signal %d", pid, WTERMSIG(status)); + else + LOG(log_info, logtype_afpd, "child[%d]: died", pid); + } + } } -int main( ac, av ) - int ac; - char **av; +static int setlimits(void) +{ + struct rlimit rlim; + + if (getrlimit(RLIMIT_NOFILE, &rlim) != 0) { + LOG(log_error, logtype_afpd, "setlimits: %s", strerror(errno)); + exit(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_error, logtype_afpd, "setlimits: %s", strerror(errno)); + exit(1); + } + } + return 0; +} + +int main(int ac, char **av) { AFPConfig *config; fd_set rfds; + void *ipc; struct sigaction sv; sigset_t sigs; + int ret; #ifdef TRU64 argc = ac; @@ -154,59 +225,115 @@ int main( ac, av ) set_auth_parameters( ac, av ); #endif /* TRU64 */ - umask( 0 ); /* so inherited file permissions work right */ + /* Log SIGBUS/SIGSEGV SBT */ + fault_setup(NULL); + + /* Default log setup: log to syslog */ + setuplog("default log_note"); afp_options_init(&default_options); if (!afp_options_parse(ac, av, &default_options)) - exit(1); - - switch(server_lock("afpd", default_options.pidfile, - default_options.flags & OPTION_DEBUG)) { + exit(EXITERR_CONF); + + /* Save the user's current umask for use with CNID (and maybe some + * other things, too). */ + default_options.save_mask = umask( default_options.umask ); + + switch(server_lock("afpd", default_options.pidfile, + default_options.flags & OPTION_DEBUG)) { case -1: /* error */ - exit(1); + exit(EXITERR_SYS); case 0: /* child */ - break; + break; default: /* server */ - exit(0); + exit(0); } - -#ifdef DID_MTAB - /* if we are going to use afpd.mtab, load the file */ - afpd_mount_table = afpd_mtab_parse ( AFPD_MTAB_FILE ); -#endif /* DID_MTAB */ + atexit(afp_exit); /* install child handler for asp and dsi. we do this before afp_goaway * as afp_goaway references stuff from here. * XXX: this should really be setup after the initial connections. */ if (!(server_children = server_child_alloc(default_options.connections, - CHILD_NFORKS))) { - syslog(LOG_ERR, "main: server_child alloc: %m"); - afp_exit(1); + CHILD_NFORKS))) { + LOG(log_error, logtype_afpd, "main: server_child alloc: %s", strerror(errno) ); + exit(EXITERR_SYS); } - - memset(&sv, 0, sizeof(sv)); + + memset(&sv, 0, sizeof(sv)); + /* 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 + sv.sa_handler = SIG_IGN; + sigemptyset( &sv.sa_mask ); + if (sigaction(SIGXFSZ, &sv, NULL ) < 0 ) { + LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) ); + exit(EXITERR_SYS); + } +#endif + sv.sa_handler = child_handler; 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, 0 ) < 0 ) { - syslog( LOG_ERR, "main: sigaction: %m" ); - afp_exit(1); + 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) ); + exit(EXITERR_SYS); + } + + sigemptyset( &sv.sa_mask ); + sigaddset(&sv.sa_mask, SIGALRM); 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, 0 ) < 0 ) { - syslog( LOG_ERR, "main: sigaction: %m" ); - afp_exit(1); + if ( sigaction( SIGHUP, &sv, NULL ) < 0 ) { + LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) ); + exit(EXITERR_SYS); } - if ( sigaction( SIGTERM, &sv, 0 ) < 0 ) { - syslog( LOG_ERR, "main: sigaction: %m" ); - afp_exit(1); + + + 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, 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. @@ -216,23 +343,42 @@ int main( ac, av ) */ sigemptyset(&sigs); + sigaddset(&sigs, SIGALRM); sigaddset(&sigs, SIGHUP); + sigaddset(&sigs, SIGUSR1); +#if 0 + /* don't block SIGTERM */ sigaddset(&sigs, SIGTERM); - sigprocmask(SIG_BLOCK, &sigs, NULL); +#endif + sigaddset(&sigs, SIGCHLD); + + pthread_sigmask(SIG_BLOCK, &sigs, NULL); if (!(configs = configinit(&default_options))) { - syslog(LOG_ERR, "main: no servers configured: %m\n"); - afp_exit(1); + LOG(log_error, logtype_afpd, "main: no servers configured"); + exit(EXITERR_CONF); } - sigprocmask(SIG_UNBLOCK, &sigs, NULL); + pthread_sigmask(SIG_UNBLOCK, &sigs, NULL); - /* watch atp and dsi sockets. */ - FD_ZERO(&save_rfds); - for (config = configs; config; config = config->next) { - if (config->fd < 0) /* for proxies */ - continue; - FD_SET(config->fd, &save_rfds); - } + /* Initialize */ + cnid_init(); + if (locktable_init("XXX") != 0) + exit(EXITERR_SYS); +#if 0 + if (rpc_init("127.0.0.1", 4701) != 0) + exit(EXITERR_SYS); +#endif + /* watch atp, dsi sockets and ipc parent/child file descriptor. */ + 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; + /* wait for an appleshare connection. parent remains in the loop * while the children get handled by afp_over_{asp,dsi}. this is * currently vulnerable to a denial-of-service attack if a @@ -240,21 +386,103 @@ int main( ac, av ) * afterwards. establishing timeouts for logins is a possible * solution. */ while (1) { - rfds = save_rfds; - if (select(FD_SETSIZE, &rfds, NULL, NULL, NULL) < 0) { - if (errno == EINTR) - continue; - syslog(LOG_ERR, "main: can't wait for input: %m"); - break; - } - - for (config = configs; config; config = config->next) { - if (config->fd < 0) - continue; - if (FD_ISSET(config->fd, &rfds)) - config->server_start(config, configs, server_children); - } - } + LOG(log_maxdebug, logtype_afpd, "main: polling %i fds", fdset_used); + pthread_sigmask(SIG_UNBLOCK, &sigs, NULL); + ret = poll(fdset, fdset_used, -1); + pthread_sigmask(SIG_BLOCK, &sigs, NULL); + int saveerrno = errno; + + 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) + if (config->server_cleanup) + config->server_cleanup(config); + + /* configfree close atp socket used for DDP tickle, there's an issue + * with atp tid. */ + configfree(configs, NULL); + if (!(configs = configinit(&default_options))) { + LOG(log_error, logtype_afpd, "config re-read: no servers configured"); + exit(EXITERR_CONF); + } + + fd_set_listening_sockets(); + + nologin = 0; + reloadconfig = 0; + errno = saveerrno; + continue; + } + + if (ret == 0) + continue; + + if (ret < 0) { + if (errno == EINTR) + continue; + LOG(log_error, logtype_afpd, "main: can't wait for input: %s", strerror(errno)); + break; + } + + for (int i = 0; i < fdset_used; i++) { + 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); + } + 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) { + fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, child->ipc_fds[0]); + close(child->ipc_fds[0]); + child->ipc_fds[0] = -1; + if (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]); + } + LOG(log_note, logtype_afpd, "main: IPC reconnect from [%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(&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; + } /* switch */ + } /* if */ + } /* for (i)*/ + } /* while (1) */ return 0; }