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-rw-r--r--src/shared/libosmocore/src/application.c102
1 files changed, 102 insertions, 0 deletions
diff --git a/src/shared/libosmocore/src/application.c b/src/shared/libosmocore/src/application.c
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+++ b/src/shared/libosmocore/src/application.c
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+/* Utility functions to setup applications */
+/*
+ * (C) 2010 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2011 by Holger Hans Peter Freyther
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <osmocom/core/application.h>
+#include <osmocom/core/logging.h>
+
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/stat.h>
+
+struct log_target *osmo_stderr_target;
+
+void osmo_init_ignore_signals(void)
+{
+ /* Signals that by default would terminate */
+ signal(SIGPIPE, SIG_IGN);
+ signal(SIGALRM, SIG_IGN);
+ signal(SIGHUP, SIG_IGN);
+ signal(SIGIO, SIG_IGN);
+}
+
+int osmo_init_logging(const struct log_info *log_info)
+{
+ log_init(log_info, NULL);
+ osmo_stderr_target = log_target_create_stderr();
+ if (!osmo_stderr_target)
+ return -1;
+
+ log_add_target(osmo_stderr_target);
+ log_set_all_filter(osmo_stderr_target, 1);
+ return 0;
+}
+
+int osmo_daemonize(void)
+{
+ int rc;
+ pid_t pid, sid;
+
+ /* Check if parent PID == init, in which case we are already a daemon */
+ if (getppid() == 1)
+ return -EEXIST;
+
+ /* Fork from the parent process */
+ pid = fork();
+ if (pid < 0) {
+ /* some error happened */
+ return pid;
+ }
+
+ if (pid > 0) {
+ /* if we have received a positive PID, then we are the parent
+ * and can exit */
+ exit(0);
+ }
+
+ /* FIXME: do we really want this? */
+ umask(0);
+
+ /* Create a new session and set process group ID */
+ sid = setsid();
+ if (sid < 0)
+ return sid;
+
+ /* Change to the /tmp directory, which prevents the CWD from being locked
+ * and unable to remove it */
+ rc = chdir("/tmp");
+ if (rc < 0)
+ return rc;
+
+ /* Redirect stdio to /dev/null */
+/* since C89/C99 says stderr is a macro, we can safely do this! */
+#ifdef stderr
+ freopen("/dev/null", "r", stdin);
+ freopen("/dev/null", "w", stdout);
+ freopen("/dev/null", "w", stderr);
+#endif
+
+ return 0;
+}