static char** arg_listen = NULL;
static bool arg_accept = false;
static char** arg_args = NULL;
-static char** arg_environ = NULL;
+static char** arg_setenv = NULL;
static int add_epoll(int epoll_fd, int fd) {
+ struct epoll_event ev = {
+ .events = EPOLLIN
+ };
int r;
- struct epoll_event ev = {EPOLLIN};
- ev.data.fd = fd;
assert(epoll_fd >= 0);
assert(fd >= 0);
+ ev.data.fd = fd;
r = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fd, &ev);
- if (r < 0)
- log_error("Failed to add event on epoll fd:%d for fd:%d: %s",
- epoll_fd, fd, strerror(-r));
- return r;
-}
-
-static int print_socket(const char* desc, int fd) {
- int r;
- SocketAddress addr = {
- .size = sizeof(union sockaddr_union),
- .type = SOCK_STREAM,
- };
- int family;
-
- r = getsockname(fd, &addr.sockaddr.sa, &addr.size);
if (r < 0) {
- log_warning("Failed to query socket on fd:%d: %m", fd);
- return 0;
- }
-
- family = socket_address_family(&addr);
- switch(family) {
- case AF_INET:
- case AF_INET6: {
- char* _cleanup_free_ a = NULL;
- r = socket_address_print(&addr, &a);
- if (r < 0)
- log_warning("socket_address_print(): %s", strerror(-r));
- else
- log_info("%s %s address %s",
- desc,
- family == AF_INET ? "IP" : "IPv6",
- a);
- break;
- }
- default:
- log_warning("Connection with unknown family %d", family);
+ log_error("Failed to add event on epoll fd:%d for fd:%d: %m", epoll_fd, fd);
+ return -errno;
}
return 0;
}
-static int make_socket_fd(const char* address, int flags) {
- _cleanup_free_ char *p = NULL;
- SocketAddress a;
- int fd, r;
-
- r = socket_address_parse(&a, address);
- if (r < 0) {
- log_error("Failed to parse socket: %s", strerror(-r));
- return r;
- }
-
- fd = socket_address_listen(&a, flags, SOMAXCONN, SOCKET_ADDRESS_DEFAULT, NULL, false, false, 0755, 0644, NULL);
- if (fd < 0) {
- log_error("Failed to listen: %s", strerror(-r));
- return fd;
- }
-
- r = socket_address_print(&a, &p);
- if (r < 0) {
- log_error("socket_address_print(): %s", strerror(-r));
- close_nointr_nofail(fd);
- return r;
- }
-
- log_info("Listening on %s", p);
-
- return fd;
-}
-
static int open_sockets(int *epoll_fd, bool accept) {
+ char **address;
int n, fd, r;
int count = 0;
- char **address;
n = sd_listen_fds(true);
if (n < 0) {
strerror(-n));
return n;
}
- log_info("Received %d descriptors", n);
+ if (n > 0) {
+ log_info("Received %i descriptors via the environment.", n);
+
+ for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) {
+ r = fd_cloexec(fd, arg_accept);
+ if (r < 0)
+ return r;
+
+ count ++;
+ }
+ }
- for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) {
- log_debug("Received descriptor fd:%d", fd);
- print_socket("Listening on", fd);
+ /* Close logging and all other descriptors */
+ if (arg_listen) {
+ int except[3 + n];
- r = fd_cloexec(fd, arg_accept);
- if (r < 0)
- return r;
+ for (fd = 0; fd < SD_LISTEN_FDS_START + n; fd++)
+ except[fd] = fd;
- count ++;
+ log_close();
+ close_all_fds(except, 3 + n);
}
/** Note: we leak some fd's on error here. I doesn't matter
*/
STRV_FOREACH(address, arg_listen) {
- log_info("Opening address %s", *address);
- fd = make_socket_fd(*address, SOCK_STREAM | (arg_accept*SOCK_CLOEXEC));
+ fd = make_socket_fd(LOG_DEBUG, *address, SOCK_STREAM | (arg_accept*SOCK_CLOEXEC));
if (fd < 0) {
+ log_open();
log_error("Failed to open '%s': %s", *address, strerror(-fd));
return fd;
}
count ++;
}
+ if (arg_listen)
+ log_open();
+
*epoll_fd = epoll_create1(EPOLL_CLOEXEC);
if (*epoll_fd < 0) {
log_error("Failed to create epoll object: %m");
return -errno;
}
-
for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + count; fd++) {
+ _cleanup_free_ char *name = NULL;
+
+ getsockname_pretty(fd, &name);
+ log_info("Listening on %s as %i.", strna(name), fd);
+
r = add_epoll(*epoll_fd, fd);
if (r < 0)
return r;
}
static int launch(char* name, char **argv, char **env, int fds) {
- unsigned n_env = 0, length;
- _cleanup_strv_free_ char **envp = NULL;
- char **s;
+
static const char* tocopy[] = {"TERM=", "PATH=", "USER=", "HOME="};
+ _cleanup_strv_free_ char **envp = NULL;
_cleanup_free_ char *tmp = NULL;
+ unsigned n_env = 0, length;
+ char **s;
unsigned i;
- length = strv_length(arg_environ);
+ length = strv_length(arg_setenv);
+
/* PATH, TERM, HOME, USER, LISTEN_FDS, LISTEN_PID, NULL */
envp = new0(char *, length + 7);
+ if (!envp)
+ return log_oom();
- STRV_FOREACH(s, arg_environ) {
+ STRV_FOREACH(s, arg_setenv) {
if (strchr(*s, '='))
envp[n_env++] = *s;
else {
log_info("Execing %s (%s)", name, tmp);
execvpe(name, argv, envp);
log_error("Failed to execp %s (%s): %m", name, tmp);
+
return -errno;
}
static int launch1(const char* child, char** argv, char **env, int fd) {
+ _cleanup_free_ char *tmp = NULL;
pid_t parent_pid, child_pid;
int r;
- _cleanup_free_ char *tmp = NULL;
tmp = strv_join(argv, " ");
if (!tmp)
return log_oom();
}
static int do_accept(const char* name, char **argv, char **envp, int fd) {
- SocketAddress addr = {
- .size = sizeof(union sockaddr_union),
- .type = SOCK_STREAM,
- };
- int fd2, r;
+ _cleanup_free_ char *local = NULL, *peer = NULL;
+ int fd2;
- fd2 = accept(fd, &addr.sockaddr.sa, &addr.size);
+ fd2 = accept(fd, NULL, NULL);
if (fd2 < 0) {
log_error("Failed to accept connection on fd:%d: %m", fd);
return fd2;
}
- print_socket("Connection from", fd2);
+ getsockname_pretty(fd2, &local);
+ getpeername_pretty(fd2, &peer);
+ log_info("Connection from %s to %s", strna(peer), strna(local));
- r = launch1(name, argv, envp, fd2);
- return r;
+ return launch1(name, argv, envp, fd2);
}
/* SIGCHLD handler. */
static void sigchld_hdl(int sig, siginfo_t *t, void *data) {
+ PROTECT_ERRNO;
+
log_info("Child %d died with code %d", t->si_pid, t->si_status);
/* Wait for a dead child. */
waitpid(t->si_pid, NULL, 0);
static int install_chld_handler(void) {
int r;
- struct sigaction act;
- zero(act);
- act.sa_flags = SA_SIGINFO;
- act.sa_sigaction = sigchld_hdl;
+ struct sigaction act = {
+ .sa_flags = SA_SIGINFO,
+ .sa_sigaction = sigchld_hdl,
+ };
r = sigaction(SIGCHLD, &act, 0);
if (r < 0)
printf("%s [OPTIONS...]\n\n"
"Listen on sockets and launch child on connection.\n\n"
"Options:\n"
- " -l --listen=ADDR Listen for raw connections at ADDR\n"
- " -a --accept Spawn separate child for each connection\n"
- " -h --help Show this help and exit\n"
- " --version Print version string and exit\n"
+ " -l --listen=ADDR Listen for raw connections at ADDR\n"
+ " -a --accept Spawn separate child for each connection\n"
+ " -h --help Show this help and exit\n"
+ " -E --setenv=NAME[=VALUE] Pass an environment variable to children\n"
+ " --version Print version string and exit\n"
"\n"
"Note: file descriptors from sd_listen_fds() will be passed through.\n"
, program_invocation_short_name
};
static const struct option options[] = {
- { "help", no_argument, NULL, 'h' },
- { "version", no_argument, NULL, ARG_VERSION },
- { "listen", required_argument, NULL, 'l' },
- { "accept", no_argument, NULL, 'a' },
- { "environment", required_argument, NULL, 'E' },
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ { "listen", required_argument, NULL, 'l' },
+ { "accept", no_argument, NULL, 'a' },
+ { "setenv", required_argument, NULL, 'E' },
+ { "environment", required_argument, NULL, 'E' }, /* alias */
{}
};
assert(argc >= 0);
assert(argv);
- while ((c = getopt_long(argc, argv, "+hl:saE:", options, NULL)) >= 0)
+ while ((c = getopt_long(argc, argv, "+hl:aE:", options, NULL)) >= 0)
switch(c) {
case 'h':
return help();
break;
case 'E': {
- int r = strv_extend(&arg_environ, optarg);
+ int r = strv_extend(&arg_setenv, optarg);
if (r < 0)
return r;
n = open_sockets(&epoll_fd, arg_accept);
if (n < 0)
return EXIT_FAILURE;
+ if (n == 0) {
+ log_error("No sockets to listen on specified or passed in.");
+ return EXIT_FAILURE;
+ }
for (;;) {
struct epoll_event event;
return EXIT_FAILURE;
}
- log_info("Communication attempt on fd:%d", event.data.fd);
+ log_info("Communication attempt on fd %i.", event.data.fd);
if (arg_accept) {
r = do_accept(argv[optind], argv + optind, envp,
event.data.fd);
~ianmdlvl / elogind.git / blobdiff