"env grep" - add support for regular expression matches
When CONFIG_REGEX is enabled, the new option "-e" becomes available
which causes regular expression matches to be used. This allows for
example things like these:
- print all MAC addresses:
=> env grep -e eth.*addr
eth1addr=00:10:ec:80:c5:15
ethaddr=00:10:ec:00:c5:15
- print all variables that have at least 2 colons in their value:
=> env grep -v -e :.*:
addip=setenv bootargs ${bootargs} ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}:${netdev}:off
panic=1
eth1addr=00:10:ec:80:c5:15
ethaddr=00:10:ec:00:c5:15
ver=U-Boot 2013.04-rc1-00289-g497746b-dirty (Mar 22 2013 - 12:50:25)
etc.
Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c
index 9158b96..f8dc38e 100644
--- a/common/cmd_nvedit.c
+++ b/common/cmd_nvedit.c
@@ -165,12 +165,13 @@
int argc, char * const argv[])
{
char *res = NULL;
- int len, grep_flags;
+ int len, grep_how, grep_what;
if (argc < 2)
return CMD_RET_USAGE;
- grep_flags = H_MATCH_BOTH;
+ 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;
@@ -178,14 +179,19 @@
--argc;
while (*++arg) {
switch (*arg) {
+#ifdef CONFIG_REGEX
+ case 'e': /* use regex matching */
+ grep_how = H_MATCH_REGEX;
+ break;
+#endif
case 'n': /* grep for name */
- grep_flags = H_MATCH_KEY;
+ grep_what = H_MATCH_KEY;
break;
case 'v': /* grep for value */
- grep_flags = H_MATCH_DATA;
+ grep_what = H_MATCH_DATA;
break;
case 'b': /* grep for both */
- grep_flags = H_MATCH_BOTH;
+ grep_what = H_MATCH_BOTH;
break;
case '-':
goto DONE;
@@ -197,7 +203,7 @@
DONE:
len = hexport_r(&env_htab, '\n',
- flag | grep_flags | H_MATCH_SUBSTR,
+ flag | grep_what | grep_how,
&res, 0, argc, argv);
if (len > 0) {
@@ -1153,8 +1159,12 @@
"env flags - print variables that have non-default flags\n"
#endif
#if defined(CONFIG_CMD_GREPENV)
+#ifdef CONFIG_REGEX
+ "env grep [-e] [-n | -v | -b] string [...] - search environment\n"
+#else
"env grep [-n | -v | -b] string [...] - search environment\n"
#endif
+#endif
#if defined(CONFIG_CMD_IMPORTENV)
"env import [-d] [-t | -b | -c] addr [size] - import environment\n"
#endif
@@ -1200,8 +1210,15 @@
U_BOOT_CMD_COMPLETE(
grepenv, CONFIG_SYS_MAXARGS, 0, do_env_grep,
"search environment variables",
+#ifdef CONFIG_REGEX
+ "[-e] [-n | -v | -b] string ...\n"
+#else
"[-n | -v | -b] string ...\n"
+#endif
" - list environment name=value pairs matching 'string'\n"
+#ifdef CONFIG_REGEX
+ " \"-e\": enable regular expressions;\n"
+#endif
" \"-n\": search variable names; \"-v\": search values;\n"
" \"-b\": search both names and values (default)",
var_complete