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"env grep" - add options to grep in name, value, or both.

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Add options to "env grep" command:

-n : search only the envrironment variable names
-v : search only their values
-b : search both names and values (= default)

An option "--" will stop parsing options, so to print variables that
contain the striing "- " please use:

	env grep -- "- "

Or to print all environment varioables which have a '-' in their name,
use:

	env grep -n -- -

Signed-off-by: Wolfgang Denk <wd@denx.de>
This commit is contained in:
Wolfgang Denk 2013-03-23 23:50:30 +00:00 • committed by Tom Rini
parent 5a31ea04c9
commit d87244d5af
1 changed files with 33 additions and 5 deletions
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38
common/cmd_nvedit.c
View file

@ -165,13 +165,39 @@ static int do_env_grep(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[]) int argc, char * const argv[])
{ {
char *res = NULL; char *res = NULL;
int len; int len, grep_flags;
if (argc < 2) if (argc < 2)
return CMD_RET_USAGE; return CMD_RET_USAGE;
grep_flags = H_MATCH_BOTH;
while (argc > 1 && **(argv + 1) == '-') {
char *arg = *++argv;
--argc;
while (*++arg) {
switch (*arg) {
case 'n': /* grep for name */
grep_flags = H_MATCH_KEY;
break;
case 'v': /* grep for value */
grep_flags = H_MATCH_DATA;
break;
case 'b': /* grep for both */
grep_flags = H_MATCH_BOTH;
break;
case '-':
goto DONE;
default:
return CMD_RET_USAGE;
}
}
}
DONE:
len = hexport_r(&env_htab, '\n', len = hexport_r(&env_htab, '\n',
flag | H_MATCH_BOTH | H_MATCH_SUBSTR, flag | grep_flags | H_MATCH_SUBSTR,
&res, 0, argc, argv); &res, 0, argc, argv);
if (len > 0) { if (len > 0) {
@ -1127,7 +1153,7 @@ static char env_help_text[] =
"env flags - print variables that have non-default flags\n" "env flags - print variables that have non-default flags\n"
#endif #endif
#if defined(CONFIG_CMD_GREPENV) #if defined(CONFIG_CMD_GREPENV)
"env grep string [...] - search environment\n" "env grep [-n | -v | -b] string [...] - search environment\n"
#endif #endif
#if defined(CONFIG_CMD_IMPORTENV) #if defined(CONFIG_CMD_IMPORTENV)
"env import [-d] [-t | -b | -c] addr [size] - import environment\n" "env import [-d] [-t | -b | -c] addr [size] - import environment\n"
@ -1174,8 +1200,10 @@ U_BOOT_CMD_COMPLETE(
U_BOOT_CMD_COMPLETE( U_BOOT_CMD_COMPLETE(
grepenv, CONFIG_SYS_MAXARGS, 0, do_env_grep, grepenv, CONFIG_SYS_MAXARGS, 0, do_env_grep,
"search environment variables", "search environment variables",
"string ...\n" "[-n | -v | -b] string ...\n"
" - list environment name=value pairs matching 'string'", " - list environment name=value pairs matching 'string'\n"
" \"-n\": search variable names; \"-v\": search values;\n"
" \"-b\": search both names and values (default)",
var_complete var_complete
); );
#endif #endif