[sanlock] 04/07: Add environment variables helpers

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teigland pushed a commit to branch master
in repository sanlock.

commit 54d51a3cba0c5896fdbaac328ba833a31ef61f95
Author: Nir Soffer <nsoffer(a)redhat.com&gt;
Date:   Thu Jan 11 04:46:17 2018 +0200

    Add environment variables helpers
    
    These helpers make it easy to get an environment variable falling back
    to default value if the environment variable is not set. This will be
    used for using a special sanlock run directory and disabling privileged
    operations when running sanlock in the tests.
    
    Signed-off-by: Nir Soffer <nsoffer(a)redhat.com&gt;
---
 src/Makefile |  9 ++++++---
 src/env.c    | 34 ++++++++++++++++++++++++++++++++++
 src/env.h    | 15 +++++++++++++++
 3 files changed, 55 insertions(+), 3 deletions(-)

diff --git a/src/Makefile b/src/Makefile
index 69fcd13..3ca25c9 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -37,7 +37,8 @@ CMD_SOURCE = \
 	monotime.c \
 	cmd.c \
 	client_cmd.c \
-	sanlock_sock.c
+	sanlock_sock.c \
+	env.c
 
 LIB_ENTIRE_SOURCE = \
 	client.c \
@@ -51,11 +52,13 @@ LIB_ENTIRE_SOURCE = \
 	task.c \
 	timeouts.c \
 	direct_lib.c \
-	monotime.c
+	monotime.c \
+	env.c
 
 LIB_CLIENT_SOURCE = \
 	client.c \
-	sanlock_sock.c
+	sanlock_sock.c \
+	env.c
 
 LIBPC_ENTIRE_SOURCE = libsanlock.pc.in
 LIBPC_CLIENT_SOURCE = libsanlock_client.pc.in
diff --git a/src/env.c b/src/env.c
new file mode 100644
index 0000000..e1d2f3a
--- /dev/null
+++ b/src/env.c
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2018 Red Hat, Inc.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU General Public License v2 or (at your option) any later version.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "env.h"
+
+const char *env_get(const char *key, const char *defval)
+{
+	const char *val;
+
+	val = getenv(key);
+	if (val == NULL)
+		return defval;
+
+	return val;
+}
+
+int env_get_bool(const char *key, int defval)
+{
+	const char *val;
+
+	val = getenv(key);
+	if (val == NULL)
+		return defval;
+
+	return strcmp(val, "1") ? 0 : 1;
+}
diff --git a/src/env.h b/src/env.h
new file mode 100644
index 0000000..ca3a3ff
--- /dev/null
+++ b/src/env.h
@@ -0,0 +1,15 @@
+/*
+ * Copyright 2018 Red Hat, Inc.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU General Public License v2 or (at your option) any later version.
+ */
+
+#ifndef	__ENV_H__
+#define	__ENV_H__
+
+const char *env_get(const char *key, const char *defval);
+int env_get_bool(const char *key, int defval);
+
+#endif

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