46 lines
1.2 KiB
C
46 lines
1.2 KiB
C
--- common/cmd_nvedit.c.orig 2014-08-14 14:51:10 UTC
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+++ common/cmd_nvedit.c
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@@ -1061,6 +1061,23 @@ sep_err:
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}
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#endif
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+#if defined(CONFIG_CMD_ENV_EXISTS)
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+static int do_env_exists(cmd_tbl_t *cmdtp, int flag, int argc,
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+ char * const argv[])
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+{
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+ ENTRY e, *ep;
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+
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+ if (argc < 2)
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+ return CMD_RET_USAGE;
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+
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+ e.key = argv[1];
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+ e.data = NULL;
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+ hsearch_r(e, FIND, &ep, &env_htab, 0);
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+
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+ return (ep == NULL) ? 1 : 0;
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+}
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+#endif
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+
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/*
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* New command line interface: "env" command with subcommands
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*/
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@@ -1096,6 +1113,9 @@ static cmd_tbl_t cmd_env_sub[] = {
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U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
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#endif
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U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
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+#if defined(CONFIG_CMD_ENV_EXISTS)
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+ U_BOOT_CMD_MKENT(exists, 2, 0, do_env_exists, "", ""),
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+#endif
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};
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#if defined(CONFIG_NEEDS_MANUAL_RELOC)
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@@ -1138,6 +1158,9 @@ static char env_help_text[] =
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#if defined(CONFIG_CMD_EDITENV)
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"env edit name - edit environment variable\n"
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#endif
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+#if defined(CONFIG_CMD_ENV_EXISTS)
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+ "env exists name - tests for existence of variable\n"
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+#endif
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#if defined(CONFIG_CMD_EXPORTENV)
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"env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
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#endif
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