`XrdSecsssID::genID(int)` constructs an `XrdSecEntity` object:
```
myID.name = (Secure || XrdOucUtils:: UserName(geteuid(), pBuff, pgSz))
? (char *)"nobody" : pBuff;
myID.grps = (Secure || XrdOucUtils::GroupName(getegid(), gBuff, pgSz))
? (char *)"nogroup" : gBuff;
```
`XrdOucUtils:: UserName` returns 0 on success, however `XrdOucUtils::GroupName` returns the length of the group name. This means on group name of length 0 ( a 'failure') the un-initialized `gBuff` will be saved in `myID.grps`. To avoid changing the behavior of `XrdOucutils::GroupName` solution is:
```
myID.name = (Secure || XrdOucUtils:: UserName(geteuid(), pBuff, pgSz))
? (char *)"nobody" : pBuff;
myID.grps = (Secure || XrdOucUtils::GroupName(getegid(), gBuff, pgSz) == 0)
? (char *)"nogroup" : gBuff;
```
---
Reply to this email directly or view it on GitHub:
https://github.com/xrootd/xrootd/issues/53
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