Right after I posted it I realized the dummy question I made; in fact in almost all machines I own what you said is true, however only on this one, from where I took the info to paste here that isn't. Wonder why is this machine different from all others on my organization. There is another place that it can be stored?
Hi!!,
I am on HP UX -11. I have created a new group and want to assign some the users to this group without changing their existing group ( The new group is the secondary group for them)
Any ideas how to do it??
SAM doesnt seem to be working.. Any way of doing it from command line??
... (1 Reply)
Hi friends,
I urgently need to know if there is any tool called source reader in C or Unix or Linux......
If so ..plz let me know the details.I am running out of time..... (0 Replies)
Is there a command or better combination of cmds that will give me the list of Unix users in a particular Unix group whether their primary group is that group in question (information stored in /etc/passwd) or they are in a secondary group (information stored in /etc/group).
So far all I got... (5 Replies)
Hi,
When I include a user to the secondary group "sys" GID=3 in Solaris 9 OS I'm not able to login. I get these error. The user home directory and the shell exists. Is this because of any security hardening.
# su - agent
No directory!
# su agent
su: No shell
# grep taddm /etc/passwd... (14 Replies)
We have created ACL's to allow two differnet groups to access some directories. You can see output from getfacl below.
group::rwx
group:rbauser:r--
The original group has full access, the secondary group has read only. However users in the secondary group can't see the directories. Think this... (1 Reply)
Hi,
I would like to know how to find our secondary group of user only.
I have used the command id -Gn user1
it is showing both groups of user.
Primary and secondary group. (2 Replies)
Hello,
i try to add user john to secondary group, named groupB
this will add as primary group,
how can i add to secondary group??
dn: cn=groupB,ou=Groups,dc=ldap-server,dc=com
changetype: modify
add: memberuid
memberuid: john (1 Reply)
Oracle Linux 6.6
grid user's secondary groups are asmadmin,asmdba,asmoper and dba
# id -a grid
uid=638(grid) gid=2000(oinstall) groups=2000(oinstall),2100(asmadmin),2200(dba),2300(asmdba),2301(asmoper)
I want to remove dba as the secondary group for grid and keep the remaining ones.
ie. I... (5 Replies)
Discussion started by: John K
5 Replies
LEARN ABOUT OPENDARWIN
getgrouplist
GETGROUPLIST(3) Linux Programmer's Manual GETGROUPLIST(3)NAME
getgrouplist - get list of groups to which a user belongs
SYNOPSIS
#include <grp.h>
int getgrouplist(const char *user, gid_t group,
gid_t *groups, int *ngroups);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
getgrouplist():
Since glibc 2.19:
_DEFAULT_SOURCE
Glibc 2.19 and earlier:
_BSD_SOURCE
DESCRIPTION
The getgrouplist() function scans the group database (see group(5)) to obtain the list of groups that user belongs to. Up to *ngroups of
these groups are returned in the array groups.
If it was not among the groups defined for user in the group database, then group is included in the list of groups returned by getgrou-
plist(); typically this argument is specified as the group ID from the password record for user.
The ngroups argument is a value-result argument: on return it always contains the number of groups found for user, including group; this
value may be greater than the number of groups stored in groups.
RETURN VALUE
If the number of groups of which user is a member is less than or equal to *ngroups, then the value *ngroups is returned.
If the user is a member of more than *ngroups groups, then getgrouplist() returns -1. In this case, the value returned in *ngroups can be
used to resize the buffer passed to a further call getgrouplist().
VERSIONS
This function is present since glibc 2.2.4.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
+---------------+---------------+----------------+
|Interface | Attribute | Value |
+---------------+---------------+----------------+
|getgrouplist() | Thread safety | MT-Safe locale |
+---------------+---------------+----------------+
CONFORMING TO
This function is nonstandard; it appears on most BSDs.
BUGS
In glibc versions before 2.3.3, the implementation of this function contains a buffer-overrun bug: it returns the complete list of groups
for user in the array groups, even when the number of groups exceeds *ngroups.
EXAMPLE
The program below displays the group list for the user named in its first command-line argument. The second command-line argument speci-
fies the ngroups value to be supplied to getgrouplist(). The following shell session shows examples of the use of this program:
$ ./a.out cecilia 0
getgrouplist() returned -1; ngroups = 3
$ ./a.out cecilia 3
ngroups = 3
16 (dialout)
33 (video)
100 (users)
Program source
#include <stdio.h>
#include <stdlib.h>
#include <grp.h>
#include <pwd.h>
int
main(int argc, char *argv[])
{
int j, ngroups;
gid_t *groups;
struct passwd *pw;
struct group *gr;
if (argc != 3) {
fprintf(stderr, "Usage: %s <user> <ngroups>
", argv[0]);
exit(EXIT_FAILURE);
}
ngroups = atoi(argv[2]);
groups = malloc(ngroups * sizeof (gid_t));
if (groups == NULL) {
perror("malloc");
exit(EXIT_FAILURE);
}
/* Fetch passwd structure (contains first group ID for user) */
pw = getpwnam(argv[1]);
if (pw == NULL) {
perror("getpwnam");
exit(EXIT_SUCCESS);
}
/* Retrieve group list */
if (getgrouplist(argv[1], pw->pw_gid, groups, &ngroups) == -1) {
fprintf(stderr, "getgrouplist() returned -1; ngroups = %d
",
ngroups);
exit(EXIT_FAILURE);
}
/* Display list of retrieved groups, along with group names */
fprintf(stderr, "ngroups = %d
", ngroups);
for (j = 0; j < ngroups; j++) {
printf("%d", groups[j]);
gr = getgrgid(groups[j]);
if (gr != NULL)
printf(" (%s)", gr->gr_name);
printf("
");
}
exit(EXIT_SUCCESS);
}
SEE ALSO getgroups(2), setgroups(2), getgrent(3), group_member(3), group(5), passwd(5)COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the
latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
GNU 2017-09-15 GETGROUPLIST(3)