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[patch] setenv(...) can delete environmentalvariables

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update setenv() function so that entering a NULL value for the
variable's value will delete the environmental variable

Signed-off-by: Jeffrey Mann <mannj@embeddedplanet.com>
Acked-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Jeffrey Mann 2007-04-23 14:00:11 +02:00 committed by Wolfgang Denk
parent ebd0a0ae05
commit 9ffd451afe
1 changed files with 4 additions and 1 deletions
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5
common/cmd_nvedit.c
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@ -391,7 +391,10 @@ int _do_setenv (int flag, int argc, char *argv[])
void setenv (char *varname, char *varvalue)
{
char *argv[4] = { "setenv", varname, varvalue, NULL };
_do_setenv (0, 3, argv);
if (varvalue == NULL)
_do_setenv (0, 2, argv);
else
_do_setenv (0, 3, argv);
}
int do_setenv ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])