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Operating Systems HP-UX Adding user to a group without SAM Post 302131964 by paqman on Tuesday 14th of August 2007 02:27:55 PM
Old 08-14-2007
Adding user to a group without SAM

How can I add a user to a specific group without using SAM? I know I can user modprpw -G, but that will overwrite any groups the user is in with the ones I specify.

I need to assume that I do not know what groups the user is already in, so I can't put them in the modprpw command. I just need to add this user to a few groups without changing the ones they are already in.

FYI, i'm talking about secondary groups, not their primary group. And I'm scripting this, so I can't just go into /etc/group and edit it manually.

Thanks!
 

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GETGROUPLIST(3) 					   BSD Library Functions Manual 					   GETGROUPLIST(3)

NAME
getgrouplist -- calculate group access list LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <unistd.h> int getgrouplist(const char *name, gid_t basegid, gid_t *groups, int *ngroups); DESCRIPTION
The getgrouplist() function reads through the group file and calculates the group access list for the user specified in name. The basegid is automatically included in the groups list. Typically this value is given as the group number from the password file. The resulting group list is returned in the array pointed to by groups. The caller specifies the size of the groups array in the integer pointed to by ngroups; the actual number of groups found is returned in ngroups. RETURN VALUES
The getgrouplist() function returns 0 on success and -1 if the size of the group list is too small to hold all the user's groups. Here, the group array will be filled with as many groups as will fit. FILES
/etc/group group membership list SEE ALSO
setgroups(2), initgroups(3) HISTORY
The getgrouplist() function first appeared in 4.4BSD. BSD
October 26, 2014 BSD
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