main: moved code to daemon.c

Moved changeToUser(), cleanUpPidFile(), killFromPidFile() to
daemon.c.  These are daemonization functions.

1 files changed, 97 insertions, 0 deletions

diff --git a/src/daemon.c b/src/daemon.c
index 566c5925..99ba4d9d 100644
--- a/src/daemon.c
+++ b/src/daemon.c
@@ -28,6 +28,46 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 
+#ifndef WIN32
+#include <signal.h>
+#include <pwd.h>
+#include <grp.h>
+#endif
+
+void
+daemonize_kill(void)
+{
+#ifndef WIN32
+	FILE *fp;
+	struct config_param *param =
+		parseConfigFilePath(CONF_PID_FILE, 0);
+	int pid, ret;
+
+	if (param == NULL)
+		g_error("no pid_file specified in the config file");
+
+	fp = fopen(param->value, "r");
+	if (fp == NULL)
+		g_error("unable to open %s \"%s\": %s",
+			CONF_PID_FILE, param->value, g_strerror(errno));
+
+	if (fscanf(fp, "%i", &pid) != 1) {
+		g_error("unable to read the pid from file \"%s\"",
+			param->value);
+	}
+	fclose(fp);
+
+	ret = kill(pid, SIGTERM);
+	if (ret < 0)
+		g_error("unable to kill proccess %i: %s",
+			pid, g_strerror(errno));
+
+	exit(EXIT_SUCCESS);
+#else
+	g_error("--kill is not available on WIN32");
+#endif
+}
+
 void
 daemonize_close_stdin(void)
 {
@@ -42,6 +82,50 @@ daemonize_close_stdin(void)
 }
 
 void
+daemonize_set_user(void)
+{
+#ifndef WIN32
+	struct config_param *param = config_get_param(CONF_USER);
+
+	if (param && strlen(param->value)) {
+		/* get uid */
+		struct passwd *userpwd;
+		if ((userpwd = getpwnam(param->value)) == NULL) {
+			g_error("no such user \"%s\" at line %i",
+				param->value, param->line);
+		}
+
+		if (setgid(userpwd->pw_gid) == -1) {
+			g_error("cannot setgid for user \"%s\" at line %i: %s",
+				param->value, param->line, strerror(errno));
+		}
+#ifdef _BSD_SOURCE
+		/* init suplementary groups
+		 * (must be done before we change our uid)
+		 */
+		if (initgroups(param->value, userpwd->pw_gid) == -1) {
+			g_warning("cannot init supplementary groups "
+				  "of user \"%s\" at line %i: %s",
+				  param->value, param->line, strerror(errno));
+		}
+#endif
+
+		/* set uid */
+		if (setuid(userpwd->pw_uid) == -1) {
+			g_error("cannot change to uid of user "
+				"\"%s\" at line %i: %s",
+				param->value, param->line, strerror(errno));
+		}
+
+		/* this is needed by libs such as arts */
+		if (userpwd->pw_dir) {
+			g_setenv("HOME", userpwd->pw_dir, true);
+		}
+	}
+#endif
+}
+
+void
 daemonize(Options *options)
 {
 #ifndef WIN32
@@ -91,3 +175,16 @@ daemonize(Options *options)
 	(void)options;
 #endif
 }
+
+void
+daemonize_delete_pidfile(void)
+{
+	struct config_param *param = parseConfigFilePath(CONF_PID_FILE, 0);
+
+	if (param == NULL)
+		return;
+
+	g_debug("cleaning up pid file");
+
+	unlink(param->value);
+}