I have a problem getting the Octet String Variable value. I always get the 0, instead of value. Here is my code:
--------
U_CHAR *GetTsInfo(INT32 *varValLen, U_CHAR *status)
{
    FILE *fp;
    extern FILE *popen();
    char buff[1024];
 
    DEBUGMSG1("\n\t@@@@@ Inside GetTsInfo() @@@@@\n");

    system("date > /root/date.txt");
    fp = fopen("/root/date.txt", "r");

    if (fp != NULL)
    {
        fgets(buff, 1024, fp);
        fclose(fp);
    }
    else
    {
        sprintf(buff, "%s", "error");
    }
 
    memcpy(gv_tsInfo, buff, strlen(buff) + 1);
    CHECK_FOR_NULL(gv_tsInfo);

    *varValLen = gv_tsInfoLen;
    return (U_CHAR *)gv_tsInfo;
}
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from MIB file:

tsInfo    OBJECT-TYPE   
    SYNTAX            OCTET STRING
    MAX-ACCESS        read-only
    STATUS            current
    DESCRIPTION        "TS Info"
    ::=  {  management  1  }

I tried directly sprintf to gv_tsInfo, it doesn't help.
How can I receive the value for Octet String in the code?