From: Simon Glass <sjg@chromium.org>
Date: Wed, 26 Feb 2014 22:59:15 +0000 (-0700)
Subject: Add cmd_process_error() to report and process errors
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=16ff9902468088a0a559b3db95421355ef60d366;p=u-boot.git

Add cmd_process_error() to report and process errors

U-Boot now uses errors defined in include/errno.h which are negative
integers. Commands which fail need to report the error and return 1
to indicate failure. Add this functionality in cmd_process_error().

For now this merely reports the error number. It would be possible
also to produce a helpful error message by storing the error strings
in U-Boot.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

diff --git a/common/command.c b/common/command.c
index 597ab4cb4d..26c37f2b9d 100644
--- a/common/command.c
+++ b/common/command.c
@@ -538,3 +538,13 @@ enum command_ret_t cmd_process(int flag, int argc, char * const argv[],
 		rc = cmd_usage(cmdtp);
 	return rc;
 }
+
+int cmd_process_error(cmd_tbl_t *cmdtp, int err)
+{
+	if (err) {
+		printf("Command '%s' failed: Error %d\n", cmdtp->name, err);
+		return 1;
+	}
+
+	return 0;
+}
diff --git a/include/command.h b/include/command.h
index f782779d8b..d3f700fc3c 100644
--- a/include/command.h
+++ b/include/command.h
@@ -64,6 +64,15 @@ extern int var_complete(int argc, char * const argv[], char last_char, int maxv,
 extern int cmd_auto_complete(const char *const prompt, char *buf, int *np, int *colp);
 #endif
 
+/**
+ * cmd_process_error() - report and process a possible error
+ *
+ * @cmdtp: Command which caused the error
+ * @err: Error code (0 if none, -ve for error, like -EIO)
+ * @return 0 if there is not error, 1 (CMD_RET_FAILURE) if an error is found
+ */
+int cmd_process_error(cmd_tbl_t *cmdtp, int err);
+
 /*
  * Monitor Command
  *