From 26f923c7cff1a46d465efcd3b8f2240523c7ab08 Mon Sep 17 00:00:00 2001 From: Evgeny Bachinin Date: Mon, 20 Mar 2023 11:23:11 +0300 Subject: cli: run_commandf(): small fixups MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit * vsnprintf() can truncate cmd, hence it makes no sense to launch such command (it's broken). Moreover, it's better to signalize to the caller about such case (for facilitating debugging or bug hunting). * Fix kernel-doc warnings: include/command.h:264: info: Scanning doc for run_commandf include/command.h:268: warning: contents before sections include/command.h:271: warning: No description found for return value of 'run_commandf' * Add printf-like format attribute to validate at compile-time the format string against parameters's type. * Fix compilation error in case of -Wall, -Werror, -Wextra: error: variable ‘i’ set but not used [-Werror=unused-but-set-variable] * Drop extra ret variable. Signed-off-by: Evgeny Bachinin Reviewed-by: Simon Glass --- common/cli.c | 25 +++++++++++++++++++------ 1 file changed, 19 insertions(+), 6 deletions(-) (limited to 'common/cli.c') diff --git a/common/cli.c b/common/cli.c index 9451e6a1426..3916a7b10a7 100644 --- a/common/cli.c +++ b/common/cli.c @@ -8,6 +8,8 @@ * JinHua Luo, GuangDong Linux Center, */ +#define pr_fmt(fmt) "cli: %s: " fmt, __func__ + #include #include #include @@ -20,6 +22,7 @@ #include #include #include +#include #ifdef CONFIG_CMDLINE /* @@ -129,16 +132,26 @@ int run_command_list(const char *cmd, int len, int flag) int run_commandf(const char *fmt, ...) { va_list args; - char cmd[128]; - int i, ret; + int nbytes; va_start(args, fmt); - i = vsnprintf(cmd, sizeof(cmd), fmt, args); + /* + * Limit the console_buffer space being used to CONFIG_SYS_CBSIZE, + * because its last byte is used to fit the replacement of \0 by \n\0 + * in underlying hush parser + */ + nbytes = vsnprintf(console_buffer, CONFIG_SYS_CBSIZE, fmt, args); va_end(args); - ret = run_command(cmd, 0); - - return ret; + if (nbytes < 0) { + pr_debug("I/O internal error occurred.\n"); + return -EIO; + } else if (nbytes >= CONFIG_SYS_CBSIZE) { + pr_debug("'fmt' size:%d exceeds the limit(%d)\n", + nbytes, CONFIG_SYS_CBSIZE); + return -ENOSPC; + } + return run_command(console_buffer, 0); } /****************************************************************************/ -- cgit v1.2.3