diff options
| -rw-r--r-- | erts/configure.in | 4 | ||||
| -rw-r--r-- | erts/epmd/src/epmd.c | 16 | ||||
| -rw-r--r-- | erts/epmd/src/epmd_int.h | 6 | ||||
| -rw-r--r-- | erts/epmd/src/epmd_srv.c | 46 |
4 files changed, 70 insertions, 2 deletions
diff --git a/erts/configure.in b/erts/configure.in index 208c294106..9ebb56e3bc 100644 --- a/erts/configure.in +++ b/erts/configure.in @@ -1042,6 +1042,8 @@ AC_CHECK_LIB(dl, dlopen) AC_CHECK_LIB(inet, main) AC_CHECK_LIB(util, openpty) +AC_CHECK_LIB(systemd-daemon, sd_listen_fds) + dnl Try to find a thread library. dnl dnl ETHR_LIB_NAME, ETHR_LIBS, ETHR_X_LIBS, ETHR_THR_LIB_BASE and ETHR_DEFS @@ -1677,6 +1679,8 @@ AC_CHECK_MEMBERS([struct ifreq.ifr_enaddr], [], [], #endif ]) +AC_CHECK_HEADERS(systemd/sd-daemon.h) + dnl ---------------------------------------------------------------------- dnl Check the availability for libdlpi dnl ---------------------------------------------------------------------- diff --git a/erts/epmd/src/epmd.c b/erts/epmd/src/epmd.c index 1678d537d1..3cfa7a782f 100644 --- a/erts/epmd/src/epmd.c +++ b/erts/epmd/src/epmd.c @@ -175,6 +175,9 @@ int main(int argc, char** argv) g->nodes.reg = g->nodes.unreg = g->nodes.unreg_tail = NULL; g->nodes.unreg_count = 0; g->active_conn = 0; +#ifdef HAVE_SYSTEMD_SD_DAEMON_H + g->is_systemd = 0; +#endif for (i = 0; i < MAX_LISTEN_SOCKETS; i++) g->listenfd[i] = -1; @@ -248,8 +251,12 @@ int main(int argc, char** argv) else usage(g); epmd_cleanup_exit(g,0); - } - else +#ifdef HAVE_SYSTEMD_SD_DAEMON_H + } else if (strcmp(argv[0], "-systemd") == 0) { + g->is_systemd = 1; + argv++; argc--; +#endif + } else usage(g); } dbg_printf(g,1,"epmd running - daemon = %d",g->is_daemon); @@ -454,6 +461,11 @@ static void usage(EpmdVars *g) fprintf(stderr, " Forcibly unregisters a name with epmd\n"); fprintf(stderr, " (only allowed if -relaxed_command_check was given when \n"); fprintf(stderr, " epmd was started).\n"); +#ifdef HAVE_SYSTEMD_SD_DAEMON_H + fprintf(stderr, " -systemd\n"); + fprintf(stderr, " Wait for socket from systemd. The option makes sense\n"); + fprintf(stderr, " when started from .socket unit.\n"); +#endif epmd_cleanup_exit(g,1); } diff --git a/erts/epmd/src/epmd_int.h b/erts/epmd/src/epmd_int.h index d4597be30c..c8f2192f7f 100644 --- a/erts/epmd/src/epmd_int.h +++ b/erts/epmd/src/epmd_int.h @@ -125,6 +125,9 @@ # include "sys/select.h" #endif +#ifdef HAVE_SYSTEMD_SD_DAEMON_H +# include <systemd/sd-daemon.h> +#endif /* ************************************************************************ */ /* Replace some functions by others by making the function name a macro */ @@ -337,6 +340,9 @@ typedef struct { int listenfd[MAX_LISTEN_SOCKETS]; char *addresses; char **argv; +#ifdef HAVE_SYSTEMD_SD_DAEMON_H + int is_systemd; +#endif } EpmdVars; void dbg_printf(EpmdVars*,int,const char*,...); diff --git a/erts/epmd/src/epmd_srv.c b/erts/epmd/src/epmd_srv.c index 247fd34d5a..93982c2f60 100644 --- a/erts/epmd/src/epmd_srv.c +++ b/erts/epmd/src/epmd_srv.c @@ -213,6 +213,39 @@ void run(EpmdVars *g) node_init(g); g->conn = conn_init(g); +#ifdef HAVE_SYSTEMD_SD_DAEMON_H + if (g->is_systemd) + { + int n; + + dbg_printf(g,2,"try to obtain sockets from systemd"); + + n = sd_listen_fds(0); + if (n < 0) + { + dbg_perror(g,"cannot obtain sockets from systemd"); + epmd_cleanup_exit(g,1); + } + else if (n == 0) + { + dbg_tty_printf(g,0,"systemd provides no sockets"); + epmd_cleanup_exit(g,1); + } + else if (n > MAX_LISTEN_SOCKETS) + { + dbg_tty_printf(g,0,"cannot listen on more than %d IP addresses", MAX_LISTEN_SOCKETS); + epmd_cleanup_exit(g,1); + } + num_sockets = n; + for (i = 0; i < num_sockets; i++) + { + g->listenfd[i] = listensock[i] = SD_LISTEN_FDS_START + i; + } + } + else + { +#endif + dbg_printf(g,2,"try to initiate listening port %d", g->port); if (g->addresses != NULL && /* String contains non-separator characters if: */ @@ -277,6 +310,9 @@ void run(EpmdVars *g) SET_ADDR(iserv_addr[0],EPMD_ADDR_ANY,sport); num_sockets = 1; } +#ifdef HAVE_SYSTEMD_SD_DAEMON_H + } +#endif #if !defined(__WIN32__) && !defined(__OSE__) /* We ignore the SIGPIPE signal that is raised when we call write @@ -294,6 +330,13 @@ void run(EpmdVars *g) FD_ZERO(&g->orig_read_mask); g->select_fd_top = 0; +#ifdef HAVE_SYSTEMD_SD_DAEMON_H + if (g->is_systemd) + for (i = 0; i < num_sockets; i++) + select_fd_set(g, listensock[i]); + else + { +#endif for (i = 0; i < num_sockets; i++) { if ((listensock[i] = socket(FAMILY,SOCK_STREAM,0)) < 0) @@ -356,6 +399,9 @@ void run(EpmdVars *g) } select_fd_set(g, listensock[i]); } +#ifdef HAVE_SYSTEMD_SD_DAEMON_H + } +#endif dbg_tty_printf(g,2,"entering the main select() loop"); |