master - lvcreate: LVM_VG_NAME applies even without name arg

[David Teigland]

Gitweb:        http://git.fedorahosted.org/git/?p=lvm2.git;a=commitdiff;h=d3af0e7528dbba308...
Commit:        d3af0e7528dbba30824379fc98cb4db437559ad5
Parent:        7417c8acfa0e9274fbfcf3220630ac3b66e88fb4
Author:        David Teigland 
AuthorDate:    Wed Feb 15 12:07:51 2017 -0600
Committer:     David Teigland 
CommitterDate: Wed Feb 15 12:07:51 2017 -0600

lvcreate: LVM_VG_NAME applies even without name arg

There was a small flaw in the logic regarding when LVM_VG_NAME
can replace a VG position arg.
---
 tools/lvmcmdline.c |   14 ++++++++++----
 1 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/tools/lvmcmdline.c b/tools/lvmcmdline.c
index 02aaff2..41ae8c4 100644
--- a/tools/lvmcmdline.c
+++ b/tools/lvmcmdline.c
@@ -1280,6 +1280,7 @@ check_val:
 static int _command_required_pos_matches(struct cmd_context *cmd, int ci, int rp, char **argv)
 {
    const char *name;
+	char *gotenv = NULL;

/*
     * rp is the index in required_pos_args[] of the required positional arg.
@@ -1311,14 +1312,19 @@ static int _command_required_pos_matches(struct cmd_context *cmd, int ci, int rp
    if (!strcmp(cmd->name, "lvcreate") &&
        (rp == 0) &&
        val_bit_is_set(commands[ci].required_pos_args[rp].def.val_bits, vg_VAL) &&
-	    (arg_is_set(cmd, name_ARG) || arg_is_set(cmd, thinpool_ARG) || arg_is_set(cmd, cachepool_ARG))) {
+	    (arg_is_set(cmd, name_ARG) ||
+	     arg_is_set(cmd, thinpool_ARG) ||
+	     arg_is_set(cmd, cachepool_ARG) ||
+	     (gotenv = getenv("LVM_VG_NAME")))) {
+
+		if (gotenv)
+			return 1;
+
    	if ((name = arg_str_value(cmd, name_ARG, NULL))) {
-			if (strstr(name, "/") || getenv("LVM_VG_NAME"))
+			if (strstr(name, "/"))
    			return 1;
    	}

-		/* FIXME: does LVM_VG_NAME also work with --thinpool/--cachepool ? */
-
    	if ((name = arg_str_value(cmd, thinpool_ARG, NULL))) {
    		if (strstr(name, "/"))
    			return 1;