sys/confd: expose systemv functions in new header

Expose systemv() and systemv_silent() to confd code that includes
core.h or systemv.h explicitly.

Signed-off-by: Richard Alpe <richard@bit42.se>

src/confd/src/Makefile.am

@@ -8,4 +8,4 @@ confd_plugin_la_CFLAGS  = $(augeas_CFLAGS) $(libite_CFLAGS) $(sysrepo_CFLAGS) $(
 confd_plugin_la_LIBADD  = $(augeas_LIBS)   $(libite_LIBS)   $(sysrepo_LIBS)
 confd_plugin_la_LDFLAGS = -module -avoid-version -shared
 confd_plugin_la_SOURCES = core.c core.h helpers.c helpers.h srx_module.c srx_module.h srx_val.c srx_val.h \
-			  ietf-system.c ietf-interfaces.c systemv.c
+			  ietf-system.c ietf-interfaces.c systemv.c systemv.h

src/confd/src/core.h

@@ -21,6 +21,7 @@
 #include <sysrepo/xpath.h>
 
 #include "helpers.h"
+#include "systemv.h"
 
 #ifndef HAVE_VASPRINTF
 int vasprintf(char **strp, const char *fmt, va_list ap);

src/confd/src/systemv.c

@@ -12,7 +12,7 @@
 /**
  * Reimplementation of system() without /bin/sh intermediary
  */
-int fsystemv(char **args, FILE *in, FILE *out, FILE *err)
+static int fsystemv(char **args, FILE *in, FILE *out, FILE *err)
 {
 	struct sigaction sa = { .sa_handler = SIG_IGN };
 	sigset_t oldmask;

src/confd/src/systemv.h

@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+
+#ifndef CONFD_SYSTEMV_H_
+#define CONFD_SYSTEMV_H_
+
+int systemv(char **args);
+int systemv_silent(char **args);
+
+#endif /* CONFD_SYSTEMV_H_ */