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From: "Matwey V. Kornilov" <matwey.kornilov@gmail.com>
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Date: Tue, 17 Dec 2013 18:16:56 +0400
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Subject: [PATCH] Add -systemd option to empd. Check for include
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systemd/sd-daemon.h and wrap systemd code into ifdef-s.
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diff --git a/erts/configure.in b/erts/configure.in
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index 9ad3671..125e579 100644
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--- a/erts/configure.in
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+++ b/erts/configure.in
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@@ -1565,6 +1565,8 @@ AC_CHECK_MEMBERS([struct ifreq.ifr_enaddr], [], [],
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#endif
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])
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+AC_CHECK_HEADERS(systemd/sd-daemon.h)
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+
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dnl ----------------------------------------------------------------------
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dnl Check the availability for libdlpi
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dnl ----------------------------------------------------------------------
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diff --git a/erts/epmd/src/epmd.c b/erts/epmd/src/epmd.c
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index 2d55b37..fc58882 100644
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--- a/erts/epmd/src/epmd.c
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+++ b/erts/epmd/src/epmd.c
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@@ -175,6 +175,9 @@ int main(int argc, char** argv)
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g->nodes.reg = g->nodes.unreg = g->nodes.unreg_tail = NULL;
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g->nodes.unreg_count = 0;
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g->active_conn = 0;
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+#ifdef HAVE_SYSTEMD_SD_DAEMON_H
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+ g->is_systemd = 0;
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+#endif
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for (i = 0; i < MAX_LISTEN_SOCKETS; i++)
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g->listenfd[i] = -1;
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@@ -248,8 +251,12 @@ int main(int argc, char** argv)
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else
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usage(g);
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epmd_cleanup_exit(g,0);
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- }
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- else
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+#ifdef HAVE_SYSTEMD_SD_DAEMON_H
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+ } else if (strcmp(argv[0], "-systemd") == 0) {
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+ g->is_systemd = 1;
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+ argv++; argc--;
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+#endif
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+ } else
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usage(g);
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}
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dbg_printf(g,1,"epmd running - daemon = %d",g->is_daemon);
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@@ -454,6 +461,11 @@ static void usage(EpmdVars *g)
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fprintf(stderr, " Forcibly unregisters a name with epmd\n");
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fprintf(stderr, " (only allowed if -relaxed_command_check was given when \n");
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fprintf(stderr, " epmd was started).\n");
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+#ifdef HAVE_SYSTEMD_SD_DAEMON_H
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+ fprintf(stderr, " -systemd\n");
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+ fprintf(stderr, " Wait for socket from systemd. The option makes sense\n");
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+ fprintf(stderr, " when started from .socket unit.\n");
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+#endif
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epmd_cleanup_exit(g,1);
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}
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diff --git a/erts/epmd/src/epmd_int.h b/erts/epmd/src/epmd_int.h
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index 656dbd1..bf1ddd8 100644
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--- a/erts/epmd/src/epmd_int.h
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+++ b/erts/epmd/src/epmd_int.h
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@@ -321,6 +321,9 @@ typedef struct {
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int listenfd[MAX_LISTEN_SOCKETS];
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char *addresses;
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char **argv;
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+#ifdef HAVE_SYSTEMD_SD_DAEMON_H
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+ int is_systemd;
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+#endif
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} EpmdVars;
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void dbg_printf(EpmdVars*,int,const char*,...);
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