File sysklogd-1.4.1-systemd.dif of Package syslogd

---
 Makefile  |    4 +--
 syslogd.c |   68 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 2 files changed, 67 insertions(+), 5 deletions(-)

--- Makefile
+++ Makefile	2022-10-17 09:00:32.945828594 +0000
@@ -20,7 +20,7 @@
 CC= gcc
 #SKFLAGS= -g -DSYSV -Wall
 #LDFLAGS= -g
-SKFLAGS= $(RPM_OPT_FLAGS) -DINET6 -O3 -DSYSV -fomit-frame-pointer -Wall -fno-strength-reduce
+SKFLAGS= $(RPM_OPT_FLAGS) -DINET6 -O3 -DSYSV -fomit-frame-pointer -Wall -fno-strength-reduce -I.
 # -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
 # -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE
 # $(shell getconf LFS_SKFLAGS)
@@ -43,7 +43,7 @@ MANDIR = $(prefix)/usr/share/man
 # specific to the ALPHA.  If you are attempting to build this package under
 # an ALPHA and linking fails with unresolved references please try
 # uncommenting the following define.
-# LIBS = ${LIBS} -linux
+LIBS += $(shell pkg-config libsystemd --libs)
 
 # Define the following to impart start-up delay in klogd.  This is
 # useful if klogd is started simultaneously or in close-proximity to syslogd.
--- syslogd.c
+++ syslogd.c	2022-10-17 08:59:33.354879789 +0000
@@ -558,6 +558,7 @@ static char sccsid[]  __attribute__ ((un
 
 #if defined(__linux__)
 #include <paths.h>
+#include <systemd/sd-daemon.h>
 #endif
 
 #ifndef UTMP_FILE
@@ -1047,8 +1048,11 @@ int main(argc, argv)
 				}
 
 				num_fds = getdtablesize();
-				for (i = 0; i < num_fds; i++)
-					(void) close(i);
+#if defined(__linux__)
+				if (sd_listen_fds(0) <= 0)
+#endif
+					for (i = 0; i < num_fds; i++)
+						(void) close(i);
 				untty();
 				break;
 			}
@@ -1362,6 +1366,59 @@ static int create_unix_socket(const char
 	if (path[0] == '\0')
 		return -1;
 
+#if defined(__linux__)
+	if (strcmp(path, _PATH_LOG) == 0) {
+		int r;
+ 
+		/* Check whether an FD was passed in from systemd. If
+		 * so, it's the /dev/log socket, so use it. */
+ 
+		r = sd_listen_fds(0);
+		if (r < 0) {
+			logerror("Failed to acquire systemd socket");
+#ifndef SYSV
+			dienow();
+#else
+			return -1;
+#endif
+		}
+
+ 
+		if (r > 1) {
+			logerror("Wrong number of systemd sockets passed");
+#ifndef SYSV
+			dienow();
+#else
+			return -1;
+#endif
+		}
+ 
+		if (r == 1) {
+			fd = SD_LISTEN_FDS_START;
+			r = sd_is_socket_unix(fd, SOCK_DGRAM, -1, _PATH_LOG, 0);
+			if (r < 0) {
+				logerror("Failed to verify systemd socket type");
+#ifndef SYSV
+				dienow();
+#else
+				return -1;
+#endif
+			}
+ 
+			if (!r) {
+				logerror("Passed systemd socket of wrong type");
+#ifndef SYSV
+				dienow();
+#else
+				return -1;
+#endif
+			}
+ 
+			return fd;
+		}
+	}
+#endif
+
 	(void) unlink(path);
 
 	memset(&sunx, 0, sizeof(sunx));
@@ -2480,7 +2537,12 @@ void dienow(void)
 	if (InetInuse) close(inetm);
 
 	/* Clean-up files. */
-	for (i = 0; i < nfunix; i++)
+	i = 0;
+#if defined(__linux__)
+	if (sd_listen_fds(0) > 0)
+		i = 1;
+#endif
+	for (; i < nfunix; i++)
 		if (funixn[i] && funix[i] != -1)
 			(void)unlink(funixn[i]);