--- /dev/null
+--- a/include/common.h
++++ b/include/common.h
+@@ -1081,4 +1081,7 @@ int parse_serveractive_element(char *str
+ #define ZBX_SESSION_ACTIVE 0
+ #define ZBX_SESSION_PASSIVE 1
+
++#define ZBX_RUN_BACKGROUND 0
++#define ZBX_RUN_FOREGROUND 1
++
+ #endif
+--- a/include/daemon.h
++++ b/include/daemon.h
+@@ -28,7 +28,7 @@ extern char *CONFIG_PID_FILE;
+
+ #include "threads.h"
+
+-int daemon_start(int allow_root, const char *user);
++int daemon_start(int allow_root, const char *user, int run_foreground);
+ void daemon_stop();
+
+ int zbx_sigusr_send(int flags);
+@@ -36,6 +36,6 @@ int zbx_sigusr_send(int flags);
+ #define ZBX_IS_RUNNING() 1
+ #define ZBX_DO_EXIT()
+
+-#define START_MAIN_ZABBIX_ENTRY(a, u) daemon_start(a, u)
++#define START_MAIN_ZABBIX_ENTRY(a, u, f) daemon_start(a, u, f)
+
+ #endif /* ZABBIX_DAEMON_H */
+--- a/src/libs/zbxnix/daemon.c
++++ b/src/libs/zbxnix/daemon.c
+@@ -272,16 +272,17 @@ static void set_daemon_signal_handlers()
+ * *
+ * Purpose: init process as daemon *
+ * *
+- * Parameters: allow_root - allow root permission for application *
+- * user - user on the system to which to drop the *
+- * privileges *
++ * Parameters: allow_root - allow root permission for application *
++ * user - user on the system to which to drop the *
++ * privileges *
++ * run_foreground - should it close its controling tty *
+ * *
+ * Author: Alexei Vladishev *
+ * *
+ * Comments: it doesn't allow running under 'root' if allow_root is zero *
+ * *
+ ******************************************************************************/
+-int daemon_start(int allow_root, const char *user)
++int daemon_start(int allow_root, const char *user, int run_foreground)
+ {
+ pid_t pid;
+ struct passwd *pwd;
+@@ -336,15 +337,22 @@ int daemon_start(int allow_root, const c
+ #endif
+ }
+
+- if (0 != (pid = zbx_fork()))
+- exit(EXIT_SUCCESS);
++ if ( ZBX_RUN_FOREGROUND != run_foreground)
++ if (0 != (pid = zbx_fork()))
++ exit(EXIT_SUCCESS);
+
+ setsid();
+
+ signal(SIGHUP, SIG_IGN);
+
+- if (0 != (pid = zbx_fork()))
+- exit(EXIT_SUCCESS);
++ if ( ZBX_RUN_FOREGROUND == run_foreground) {
++ zabbix_log(LOG_LEVEL_INFORMATION, "Running in foreground...");
++ } else {
++ if (0 != (pid = zbx_fork()))
++ exit(EXIT_SUCCESS);
++ }
++
++
+
+ if (-1 == chdir("/")) /* this is to eliminate warning: ignoring return value of chdir */
+ assert(0);
+--- a/src/zabbix_agent/zabbix_agentd.c
++++ b/src/zabbix_agent/zabbix_agentd.c
+@@ -62,6 +62,8 @@ const char *progname = NULL;
+ static char DEFAULT_CONFIG_FILE[] = SYSCONFDIR "/zabbix_agentd.conf";
+ #endif
+
++int CONFIG_FOREGROUND = ZBX_RUN_BACKGROUND;
++
+ /* application TITLE */
+ const char title_message[] = APPLICATION_NAME
+ #if defined(_WIN64)
+@@ -93,6 +95,7 @@ const char usage_message[] =
+ const char *help_message[] = {
+ "Options:",
+ " -c --config <config-file> Absolute path to the configuration file",
++ " -f --foreground Run in foreground don't fork",
+ " -p --print Print known items and exit",
+ " -t --test <item key> Test specified item and exit",
+ " -h --help Display help information",
+@@ -127,6 +130,7 @@ const char *help_message[] = {
+ /* COMMAND LINE OPTIONS */
+ static struct zbx_option longopts[] =
+ {
++ {"foreground", 0, NULL, 'f'},
+ {"config", 1, NULL, 'c'},
+ {"help", 0, NULL, 'h'},
+ {"version", 0, NULL, 'V'},
+@@ -147,7 +151,7 @@ static struct zbx_option longopts[] =
+ };
+
+ static char shortopts[] =
+- "c:hVpt:"
++ "c:hfVpt:"
+ #ifndef _WINDOWS
+ "R:"
+ #else
+@@ -241,6 +245,9 @@ static void parse_commandline(int argc,
+ {
+ switch (ch)
+ {
++ case 'f':
++ CONFIG_FOREGROUND = ZBX_RUN_FOREGROUND;
++ break;
+ case 'c':
+ CONFIG_FILE = strdup(zbx_optarg);
+ break;
+@@ -944,7 +951,7 @@ int main(int argc, char **argv)
+ break;
+ }
+
+- START_MAIN_ZABBIX_ENTRY(CONFIG_ALLOW_ROOT, CONFIG_USER);
++ START_MAIN_ZABBIX_ENTRY(CONFIG_ALLOW_ROOT, CONFIG_USER, CONFIG_FOREGROUND);
+
+ exit(EXIT_SUCCESS);
+ }
+--- a/src/zabbix_proxy/proxy.c
++++ b/src/zabbix_proxy/proxy.c
+@@ -60,6 +60,7 @@ const char usage_message[] = "[-hV] [-c
+
+ const char *help_message[] = {
+ "Options:",
++ " -f --foreground Run in foreground don't fork",
+ " -c --config <file> Absolute path to the configuration file",
+ " -R --runtime-control <option> Perform administrative functions",
+ "",
+@@ -84,6 +85,7 @@ const char *help_message[] = {
+ /* long options */
+ static struct zbx_option longopts[] =
+ {
++ {"foreground", 0, NULL, 'f'},
+ {"config", 1, NULL, 'c'},
+ {"runtime-control", 1, NULL, 'R'},
+ {"help", 0, NULL, 'h'},
+@@ -92,7 +94,7 @@ static struct zbx_option longopts[] =
+ };
+
+ /* short options */
+-static char shortopts[] = "c:n:hVR:";
++static char shortopts[] = "c:n:fhVR:";
+
+ /* end of COMMAND LINE OPTIONS */
+
+@@ -202,6 +204,7 @@ char *CONFIG_LOAD_MODULE_PATH = NULL;
+ char **CONFIG_LOAD_MODULE = NULL;
+
+ char *CONFIG_USER = NULL;
++int CONFIG_FOREGROUND = ZBX_RUN_BACKGROUND;
+
+ /* web monitoring */
+ #ifdef HAVE_LIBCURL
+@@ -666,6 +669,9 @@ int main(int argc, char **argv)
+ {
+ switch (ch)
+ {
++ case 'f':
++ CONFIG_FOREGROUND = ZBX_RUN_FOREGROUND;
++ break;
+ case 'c':
+ CONFIG_FILE = zbx_strdup(CONFIG_FILE, zbx_optarg);
+ break;
+@@ -705,7 +711,7 @@ int main(int argc, char **argv)
+ init_ipmi_handler();
+ #endif
+
+- return daemon_start(CONFIG_ALLOW_ROOT, CONFIG_USER);
++ return daemon_start(CONFIG_ALLOW_ROOT, CONFIG_USER, CONFIG_FOREGROUND);
+ }
+
+ int MAIN_ZABBIX_ENTRY()
+--- a/src/zabbix_server/server.c
++++ b/src/zabbix_server/server.c
+@@ -64,6 +64,7 @@ const char usage_message[] = "[-hV] [-c
+
+ const char *help_message[] = {
+ "Options:",
++ " -f --foreground Run in foreground don't fork",
+ " -c --config <file> Absolute path to the configuration file",
+ " -R --runtime-control <option> Perform administrative functions",
+ "",
+@@ -88,6 +89,7 @@ const char *help_message[] = {
+ /* long options */
+ static struct zbx_option longopts[] =
+ {
++ {"foreground", 0, NULL, 'f'},
+ {"config", 1, NULL, 'c'},
+ {"runtime-control", 1, NULL, 'R'},
+ {"help", 0, NULL, 'h'},
+@@ -96,7 +98,7 @@ static struct zbx_option longopts[] =
+ };
+
+ /* short options */
+-static char shortopts[] = "c:n:hVR:";
++static char shortopts[] = "c:n:fhVR:";
+
+ /* end of COMMAND LINE OPTIONS */
+
+@@ -197,6 +199,7 @@ char *CONFIG_LOAD_MODULE_PATH = NULL;
+ char **CONFIG_LOAD_MODULE = NULL;
+
+ char *CONFIG_USER = NULL;
++int CONFIG_FOREGROUND = ZBX_RUN_BACKGROUND;
+
+ /* web monitoring */
+ #ifdef HAVE_LIBCURL
+@@ -631,6 +634,9 @@ int main(int argc, char **argv)
+ {
+ switch (ch)
+ {
++ case 'f':
++ CONFIG_FOREGROUND = ZBX_RUN_FOREGROUND;
++ break;
+ case 'c':
+ CONFIG_FILE = zbx_strdup(CONFIG_FILE, zbx_optarg);
+ break;
+@@ -670,7 +676,7 @@ int main(int argc, char **argv)
+ init_ipmi_handler();
+ #endif
+
+- return daemon_start(CONFIG_ALLOW_ROOT, CONFIG_USER);
++ return daemon_start(CONFIG_ALLOW_ROOT, CONFIG_USER, CONFIG_FOREGROUND);
+ }
+
+ int MAIN_ZABBIX_ENTRY()
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