confd: Allow usage of asprintf

src/confd/configure.ac

@@ -15,6 +15,10 @@ AC_CONFIG_FILES([
 AC_PROG_CC
 AC_PROG_INSTALL
 
+AC_CONFIG_LIBOBJ_DIR(lib)
+AC_REPLACE_FUNCS(vasprintf)
+AC_REPLACE_FUNCS(asprintf)
+
 # Check for pkg-config first, warn if it's not installed
 PKG_PROG_PKG_CONFIG
 

src/confd/lib/asprintf.c

@@ -0,0 +1,18 @@
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifndef HAVE_VASPRINTF
+int vasprintf(char **strp, const char *fmt, va_list ap);
+#endif
+
+int asprintf(char **strp, const char *fmt, ...)
+{
+    va_list ap;
+    int len;
+
+    va_start(ap, fmt);
+    len = vasprintf(strp, fmt, ap);
+    va_end(ap);
+    return len;
+}

src/confd/lib/vasprintf.c

@@ -0,0 +1,25 @@
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int vasprintf(char **strp, const char *fmt, va_list ap)
+{
+    va_list apdup;
+    char *str;
+    int len;
+
+    va_copy(apdup, ap);
+    len = vsnprintf(0, 0, fmt, apdup);
+    va_end(apdup);
+
+    if (len < 0)
+	    return -1;
+
+    len++;
+    str = malloc(len);
+    if (!str)
+        return -1;
+
+    *strp = str;
+    return vsnprintf(str, len, fmt, ap);
+}

src/confd/src/Makefile.am

@@ -1,5 +1,5 @@
 CFLAGS                  = -Wall -Wextra -Werror -Wno-unused-parameter
-AM_CPPFLAGS             = -D_DEFAULT_SOURCE -D_XOPEN_SOURCE -DYANG_PATH_=\"$(YANGDIR)/\"
+AM_CPPFLAGS             = -D_DEFAULT_SOURCE -D_XOPEN_SOURCE -D_GNU_SOURCE -DYANG_PATH_=\"$(YANGDIR)/\"
 
 plugindir               = $(srpdplugindir)
 plugin_LTLIBRARIES      = confd-plugin.la

src/confd/src/core.h

@@ -17,6 +17,12 @@
 #include <sysrepo/values.h>
 #include <sysrepo/xpath.h>
 
+#ifndef HAVE_VASPRINTF
+int vasprintf(char **strp, const char *fmt, va_list ap);
+#endif
+#ifndef HAVE_ASPRINTF
+int asprintf(char **strp, const char *fmt, ...);
+#endif
 
 #define NELEMS(arr) (sizeof(arr) / sizeof(arr[0]))