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Old 11-04-2004, 09:23 AM   #1
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Registered: Nov 2004
Location: India,Bangalore
Posts: 5

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Smile Problem in setgroups system call

I am running the following code on two different distributions on different machines ,

int ret;

ret = setgroups(33,0);
printf("ret %d error %d\n",ret,errno);
perror(" ");

I am getting different outputs like :

machine 1, distribution 1 :
ret -1 error 14
: bad address
Hardware details : Intel Xeon P4 2ghz, 256mb ram
Distribution : my own build system

machine 2, distribution 2 :
ret -1 error 22
: Invalid argument
Hardware details : Intel P4 2ghz, 256mb ram
Distribution : Redhat fedora v10

Why is this so ?

Thanks in adavance,
Prashant P Y
Old 11-04-2004, 09:52 AM   #2
Senior Member
Registered: Aug 2002
Location: Groningen, The Netherlands
Distribution: ubuntu
Posts: 2,530

Rep: Reputation: 110Reputation: 110
Re: Problem in setgroups system call

Originally posted by ppy
ret = setgroups(33,0);
The prototype for setgroups() is:
int setgroups(size_t size, const gid_t *list);
So, when you call
You are passing 0 as the pointer where setgroups() can find 33 gid's ?!?!?
"bas address" it says. Not really surprising IMHO...


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