Add support for systemd ExecReload option. (#623)

Author: DimCitus

src/bin/pg_autoctl/systemd_config.c

@@ -53,6 +53,10 @@
 	make_int_option_default("Service", "StartLimitBurst", NULL, true, \
 							&(config->StartLimitBurst), 20)
 
+#define OPTION_SYSTEMD_EXECRELOAD(config) \
+	make_strbuf_option_default("Service", "ExecReload", NULL, true, BUFSIZE, \
+							   config->ExecReload, "/usr/bin/pg_autoctl reload")
+
 #define OPTION_SYSTEMD_WANTEDBY(config) \
 	make_strbuf_option_default("Install", "WantedBy", NULL, true, BUFSIZE, \
 							   config->WantedBy, "multi-user.target")
@@ -66,6 +70,7 @@
 		OPTION_SYSTEMD_EXECSTART(config), \
 		OPTION_SYSTEMD_RESTART(config), \
 		OPTION_SYSTEMD_STARTLIMITBURST(config), \
+		OPTION_SYSTEMD_EXECRELOAD(config), \
 		OPTION_SYSTEMD_WANTEDBY(config), \
 		INI_OPTION_LAST \
 	}
@@ -108,6 +113,7 @@ systemd_config_init(SystemdServiceConfig *config, const char *pgdata)
 
 	/* adjust the program to the current full path of argv[0] */
 	sformat(config->ExecStart, BUFSIZE, "%s run", pg_autoctl_program);
+	sformat(config->ExecReload, BUFSIZE, "%s reload", pg_autoctl_program);
 
 	if (!ini_validate_options(systemdOptions))
 	{

src/bin/pg_autoctl/systemd_config.h

@@ -29,6 +29,7 @@ typedef struct SystemdServiceConfig
 	char ExecStart[BUFSIZE];
 	char Restart[BUFSIZE];
 	int StartLimitBurst;
+	char ExecReload[BUFSIZE];
 
 	/* Install */
 	char WantedBy[BUFSIZE];