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setenv(): Delete 0-length environment variables

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Previously setenv() would only delete an environment variable if it
was passed a NULL string pointer as a value.  It should also delete an
environment variable when it encounters a valid string pointer of
0-length.

This change/fix is generally useful and is necessary for the upcoming
"editenv" command.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
This commit is contained in:
Peter Tyser 2009-10-25 15:12:55 -05:00 committed by Wolfgang Denk
parent ecc5500ee4
commit b0fa8e5063
1 changed files with 1 additions and 1 deletions
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2
common/cmd_nvedit.c
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@ -400,7 +400,7 @@ int _do_setenv (int flag, int argc, char *argv[])
int setenv (char *varname, char *varvalue)
{
char *argv[4] = { "setenv", varname, varvalue, NULL };
if (varvalue == NULL)
if ((varvalue == NULL) || (varvalue[0] == '\0'))
return _do_setenv (0, 2, argv);
else
return _do_setenv (0, 3, argv);