From 8fca82f148fcf227e655591410f11e85d2edadb1 Mon Sep 17 00:00:00 2001
From: Sami Kerola <kerolasa@iki.fi>
Date: Fri, 4 Dec 2015 20:35:35 +0000
Subject: [PATCH] print include system error message when output fails

Users want to know why write fail - was it because disk full, or destination
read-only, or IO error, and so on.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
---
 src/other.c  |  2 +-
 src/output.c | 24 ++++++++++++------------
 2 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/src/other.c b/src/other.c
index 91cde58..f4cf877 100644
--- a/src/other.c
+++ b/src/other.c
@@ -405,7 +405,7 @@ void clean_up(void)
 
 	/* Just in case there something in buffers */
 	if (fflush(NULL))
-		error(0, 0, "clean_up: fflush");
+		error(EXIT_FAILURE, errno, "clean_up: fflush");
 	free(config.dhcpdconf_file);
 	free(config.dhcpdlease_file);
 	free(config.output_file);
diff --git a/src/output.c b/src/output.c
index 2574d18..203fd65 100644
--- a/src/output.c
+++ b/src/output.c
@@ -200,12 +200,12 @@ int output_txt(void)
 	if (outfile == stdout) {
 		ret = fflush(stdout);
 		if (ret) {
-			error(0, 0, "output_txt: fflush");
+			error(EXIT_FAILURE, errno, "output_txt: fflush");
 		}
 	} else {
 		ret = close_stream(outfile);
 		if (ret) {
-			error(0, 0, "output_txt: fclose");
+			error(EXIT_FAILURE, errno, "output_txt: fclose");
 		}
 	}
 
@@ -303,12 +303,12 @@ int output_xml(void)
 	if (outfile == stdout) {
 		ret = fflush(stdout);
 		if (ret) {
-			error(0, 0, "output_xml: fflush");
+			error(EXIT_FAILURE, errno, "output_xml: fflush");
 		}
 	} else {
 		ret = close_stream(outfile);
 		if (ret) {
-			error(0, 0, "output_xml: fclose");
+			error(EXIT_FAILURE, errno, "output_xml: fclose");
 		}
 	}
 
@@ -440,12 +440,12 @@ int output_json(void)
 	if (outfile == stdout) {
 		ret = fflush(stdout);
 		if (ret) {
-			error(0, 0, "output_json: fflush");
+			error(EXIT_FAILURE, errno, "output_json: fflush");
 		}
 	} else {
 		ret = close_stream(outfile);
 		if (ret) {
-			error(0, 0, "output_json: fclose");
+			error(EXIT_FAILURE, errno, "output_json: fclose");
 		}
 	}
 
@@ -769,12 +769,12 @@ int output_html(void)
 	if (outfile == stdout) {
 		ret = fflush(stdout);
 		if (ret) {
-			error(0, 0, "output_html: fflush");
+			error(EXIT_FAILURE, errno, "output_html: fflush");
 		}
 	} else {
 		ret = close_stream(outfile);
 		if (ret) {
-			error(0, 0, "output_html: fclose");
+			error(EXIT_FAILURE, errno, "output_html: fclose");
 		}
 	}
 	return 0;
@@ -911,12 +911,12 @@ int output_csv(void)
 	if (outfile == stdout) {
 		ret = fflush(stdout);
 		if (ret) {
-			error(0, 0, "output_cvs: fflush");
+			error(EXIT_FAILURE, errno, "output_cvs: fflush");
 		}
 	} else {
 		ret = close_stream(outfile);
 		if (ret) {
-			error(0, 0, "output_cvs: fclose");
+			error(EXIT_FAILURE, errno, "output_cvs: fclose");
 		}
 	}
 	return 0;
@@ -1032,12 +1032,12 @@ int output_alarming(void)
 	if (outfile == stdout) {
 		ret = fflush(stdout);
 		if (ret) {
-			error(0, 0, "output_alarming: fflush");
+			error(EXIT_FAILURE, errno, "output_alarming: fflush");
 		}
 	} else {
 		ret = close_stream(outfile);
 		if (ret) {
-			error(0, 0, "output_alarming: fclose");
+			error(EXIT_FAILURE, errno, "output_alarming: fclose");
 		}
 	}
 	return ret_val;