diff options
Diffstat (limited to 'common/cmd_nvedit.c')
| -rw-r--r-- | common/cmd_nvedit.c | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c index ba9ba1697..5bcc32467 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 |