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"env grep" - add support for regular expression matches

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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>
This commit is contained in:
Wolfgang Denk
2013-03-23 23:50:32 +00:00
committed by Tom Rini
parent a5ecbe62c2
commit be29df6a1a
3 changed files with 52 additions and 11 deletions
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5
include/search.h
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@@ -129,7 +129,8 @@ extern int hwalk_r(struct hsearch_data *__htab, int (*callback)(ENTRY *));
#define H_MATCH_DATA (1 << 5) /* search/grep data = variable values */
#define H_MATCH_BOTH (H_MATCH_KEY | H_MATCH_DATA) /* search/grep both */
#define H_MATCH_IDENT (1 << 6) /* search for indentical strings */
#define H_MATCH_SUBSTR (1 << 7) /* search for substring matches */
#define H_MATCH_METHOD (H_MATCH_IDENT | H_MATCH_SUBSTR)
#define H_MATCH_SUBSTR (1 << 7) /* search for substring matches */
#define H_MATCH_REGEX (1 << 8) /* search for regular expression matches */
#define H_MATCH_METHOD (H_MATCH_IDENT | H_MATCH_SUBSTR | H_MATCH_REGEX)
#endif /* search.h */