Thread: What is the maximum number of members that a group can have?

Does anyone of you knows the maximum number of members that a group can have?
Kernel 2.4 / 2.6..........
)

In older implementations (glibc), a group cannot have more than 200 members. The maximum line length of /etc/group is 1024 characters. Longer lines will be skipped. This limitation disappeared in newer version of glibc. Older binaries that are statically linked, depend on old shared libraries, may still have this limit.

More info can be found at The GNU C Library docs : http://www.gnu.org/software/libc/man...ode/index.html

Try command:

Code:

grep GID /etc/login.defs

Write c program:

Code:

vi test.c

Type following program:

Code:

#include <unistd.h>
#include <stdio.h>
int main&#40;void&#41;&#123;
 long n = sysconf&#40;_SC_NGROUPS_MAX&#41;;
 printf&#40;"Max Groups &#58; %ld\n",n&#41;;
 return 0;
&#125;

Compile

Code:

gcc test.c -o test

Run program:

Code:

./test

Output:

Code:

Max Groups : 65536

Yes the problem is the limitation of 1024 characters for /etc/group.
Upgraded the version glibc and everything now works smoothly.

thanks to everybody.....