[PATCH v2 08/16] lib: Implement error properly even when not HAVE_ERR_H

[Yonggang Luo <luoyonggang@gmail.com>]

on win32, there is no err.h

Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
---
 lib/error.c  | 16 +++++++++++++++-
 lib/system.h |  4 +---
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/lib/error.c b/lib/error.c
index 5186fc15..d4cbf0ff 100644
--- a/lib/error.c
+++ b/lib/error.c
@@ -28,12 +28,14 @@
 
 #include <config.h>
 
-#if !defined(HAVE_ERROR_H) && defined(HAVE_ERR_H)
+#if !defined(HAVE_ERROR_H)
 #include <errno.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
+#if defined(HAVE_ERR_H)
 #include <err.h>
+#endif
 
 unsigned int error_message_count = 0;
 
@@ -44,6 +46,7 @@ void error(int status, int errnum, const char *format, ...) {
   fflush (stdout);
 
   va_start(argp, format);
+#if defined(HAVE_ERR_H)
   if (status)
     {
       if (errnum)
@@ -64,6 +67,17 @@ void error(int status, int errnum, const char *format, ...) {
       else
         vwarnx (format, argp);
     }
+#else
+  if (errnum)
+    {
+      errno = errnum;
+    }
+  vfprintf(stderr, format, argp);
+  if (status)
+    {
+      _exit(status);
+    }
+#endif
   va_end(argp);
 
   fflush (stderr);
diff --git a/lib/system.h b/lib/system.h
index 561d3e03..7f9f2a91 100644
--- a/lib/system.h
+++ b/lib/system.h
@@ -50,11 +50,9 @@
 
 #if defined(HAVE_ERROR_H)
 #include <error.h>
-#elif defined(HAVE_ERR_H)
+#else
 extern int error_message_count;
 void error(int status, int errnum, const char *format, ...);
-#else
-#error "err.h or error.h must be available"
 #endif
 
 /* error (EXIT_FAILURE, ...) should be noreturn but on some systems it
-- 
2.36.1.windows.1