X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=common%2Fcmd_nvedit.c;h=5bcc324675eb7535c9e103cd473134122b83e376;hb=8ad59c9a7bef49a18078888ad8eba8e87737c3b2;hp=ba9ba16972cda0c3502fd24399f2666f20544046;hpb=9cc18042e61275210cf888e5759347eeb2a2e297;p=u-boot

diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c
index ba9ba16972..5bcc324675 100644
--- a/common/cmd_nvedit.c
+++ b/common/cmd_nvedit.c
@@ -157,10 +157,8 @@ static int do_env_grep(cmd_tbl_t *cmdtp, int flag,
 	grep_how  = H_MATCH_SUBSTR;	/* default: substring search	*/
 	grep_what = H_MATCH_BOTH;	/* default: grep names and values */
 
-	while (argc > 1 && **(argv + 1) == '-') {
-		char *arg = *++argv;
-
-		--argc;
+	while (--argc > 0 && **++argv == '-') {
+		char *arg = *argv;
 		while (*++arg) {
 			switch (*arg) {
 #ifdef CONFIG_REGEX
@@ -1059,6 +1057,23 @@ sep_err:
 }
 #endif
 
+#if defined(CONFIG_CMD_ENV_EXISTS)
+static int do_env_exists(cmd_tbl_t *cmdtp, int flag, int argc,
+		       char * const argv[])
+{
+	ENTRY e, *ep;
+
+	if (argc < 2)
+		return CMD_RET_USAGE;
+
+	e.key = argv[1];
+	e.data = NULL;
+	hsearch_r(e, FIND, &ep, &env_htab, 0);
+
+	return (ep == NULL) ? 1 : 0;
+}
+#endif
+
 /*
  * New command line interface: "env" command with subcommands
  */
@@ -1094,6 +1109,9 @@ static cmd_tbl_t cmd_env_sub[] = {
 	U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
 #endif
 	U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
+#if defined(CONFIG_CMD_ENV_EXISTS)
+	U_BOOT_CMD_MKENT(exists, 2, 0, do_env_exists, "", ""),
+#endif
 };
 
 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
@@ -1136,6 +1154,9 @@ static char env_help_text[] =
 #if defined(CONFIG_CMD_EDITENV)
 	"env edit name - edit environment variable\n"
 #endif
+#if defined(CONFIG_CMD_ENV_EXISTS)
+	"env exists name - tests for existence of variable\n"
+#endif
 #if defined(CONFIG_CMD_EXPORTENV)
 	"env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
 #endif