[LTP] test specific command line options

[Jan Stancek <jstancek@redhat.com>]

----- Original Message -----
> From: "Han Pingtian" <hanpt@linux.vnet.ibm.com>
> To: ltp@lists.linux.it
> Sent: Thursday, 28 July, 2016 10:12:49 AM
> Subject: [LTP] test specific command line options
> 
> Hi,
> 
> From the doc I read:
> 
> ... The 'arg' is where 'optarg' is stored upon match. If option has no
> parameter it's set to non-'NULL' value if option was present.
> 
> But looks like if a option was present which has no parameter, the 'arg'
> will set to NULL?

You're right, that looks like a BUG. If you don't provide colon,
then "arg" stays NULL, but doc say it should be non-NULL:

diff --git a/lib/tst_test.c b/lib/tst_test.c
index 4f417ea345e7..0b99bedd8d81 100644
--- a/lib/tst_test.c
+++ b/lib/tst_test.c
@@ -384,6 +384,7 @@ static void parse_topt(unsigned int topts_len, int opt, char *optarg)
 {
        unsigned int i;
        struct tst_option *toptions = tst_test->options;
+       static char *match = "";
 
        for (i = 0; i < topts_len; i++) {
                if (toptions[i].optstr[0] == opt)
@@ -393,7 +394,10 @@ static void parse_topt(unsigned int topts_len, int opt, char *optarg)
        if (i >= topts_len)
                tst_brk(TBROK, "Invalid option '%c' (should not happen)", opt);
 
-       *(toptions[i].arg) = optarg;
+       if (optarg)
+               *(toptions[i].arg) = optarg;
+       else
+               *(toptions[i].arg) = match;
 }
 
 /* see self_exec.c */


Regards,
Jan

> 
> Thanks in advance.
> 
> 
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