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 --- Changes in v3: None Changes in v2: None
common/command.c | 10 ++++++++++ include/command.h | 9 +++++++++ 2 files changed, 19 insertions(+)
diff --git a/common/command.c b/common/command.c index 305a236..70faa60 100644 --- a/common/command.c +++ b/common/command.c @@ -554,3 +554,13 @@ 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 65692fd..e82c555 100644 --- a/include/command.h +++ b/include/command.h @@ -80,6 +80,15 @@ 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 *