Make errno a positive value

Normally errno contains a positive error value. A certain unnamed developer
mixed this up while implementing U-Boot-v2. Also, normally errno is never
set to zero by any library function.
This patch fixes this.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

3 files changed, 5 insertions, 5 deletions

diff --git a/common/env.c b/common/env.c
index e57a520a35..a01a27e24f 100644
--- a/common/env.c
+++ b/common/env.c
@@ -219,7 +219,7 @@ int setenv(const char *_name, const char *value)
 		else
 			ret = -ENODEV;
 
-		errno = ret;
+		errno = -ret;
 
 		if (ret < 0)
 			perror("set parameter");
diff --git a/common/environment.c b/common/environment.c
index 0fdbd03e00..52ce0de1da 100644
--- a/common/environment.c
+++ b/common/environment.c
@@ -187,7 +187,7 @@ int envfs_load(char *filename, char *dir)
 	ret = read(envfd, &super, sizeof(struct envfs_super));
 	if ( ret < sizeof(struct envfs_super)) {
 		perror("read");
-		ret = errno;
+		ret = -errno;
 		goto out;
 	}
 
@@ -210,7 +210,7 @@ int envfs_load(char *filename, char *dir)
 	ret = read(envfd, buf, size);
 	if (ret < size) {
 		perror("read");
-		ret = errno;
+		ret = -errno;
 		goto out;
 	}
 
@@ -256,7 +256,7 @@ int envfs_load(char *filename, char *dir)
 				inode_size);
 		if (ret < inode_size) {
 			perror("write");
-			ret = errno;
+			ret = -errno;
 			close(fd);
 			goto out;
 		}
diff --git a/common/misc.c b/common/misc.c
index b31a45c1a4..01e1b19e0d 100644
--- a/common/misc.c
+++ b/common/misc.c
@@ -112,7 +112,7 @@ EXPORT_SYMBOL(strerror);
 
 const char *errno_str(void)
 {
-	return strerror(-errno);
+	return strerror(errno);
 }
 EXPORT_SYMBOL(errno_str);