/*
* grp_update - update group file entries
*
* grp_update() writes the new records to the group files.
*/
static void grp_update (void)
{
/*
* To add the group, we need to update /etc/group.
* Make sure failures will be reported.
*/
add_cleanup (cleanup_report_del_group_group, group_name);
#ifdef SHADOWGRP
if (is_shadow_grp) {
/* We also need to update /etc/gshadow */
add_cleanup (cleanup_report_del_group_gshadow, group_name);
}
#endif
/*
* Delete the group entry.
*/
if (gr_remove (group_name) == 0) {
fprintf (stderr,
_("%s: cannot remove entry '%s' from %s\n"),
Prog, group_name, gr_dbname ());
exit (E_GRP_UPDATE);
}
#ifdef SHADOWGRP
/*
* Delete the shadow group entries as well.
*/
if (is_shadow_grp && (sgr_locate (group_name) != NULL)) {
if (sgr_remove (group_name) == 0) {
fprintf (stderr,
_("%s: cannot remove entry '%s' from %s\n"),
Prog, group_name, sgr_dbname ());
exit (E_GRP_UPDATE);
}
}
#endif /* SHADOWGRP */
}
/*
* grp_update - update group file entries
*
* grp_update() updates the new records in the memory databases.
*/
static void grp_update (void)
{
struct group grp;
const struct group *ogrp;
#ifdef SHADOWGRP
struct sgrp sgrp;
const struct sgrp *osgrp = NULL;
#endif /* SHADOWGRP */
/*
* Get the current settings for this group.
*/
ogrp = gr_locate (group_name);
if (!ogrp) {
fprintf (stderr,
_("%s: group '%s' does not exist in %s\n"),
Prog, group_name, gr_dbname ());
exit (E_GRP_UPDATE);
}
grp = *ogrp;
new_grent (&grp);
#ifdef SHADOWGRP
if ( is_shadow_grp
&& (pflg || nflg)) {
osgrp = sgr_locate (group_name);
if (NULL != osgrp) {
sgrp = *osgrp;
new_sgent (&sgrp);
if (pflg) {
grp.gr_passwd = SHADOW_PASSWD_STRING;
}
}
}
#endif /* SHADOWGRP */
if (gflg) {
update_primary_groups (ogrp->gr_gid, group_newid);
}
/*
* Write out the new group file entry.
*/
if (gr_update (&grp) == 0) {
fprintf (stderr,
_("%s: failed to prepare the new %s entry '%s'\n"),
Prog, gr_dbname (), grp.gr_name);
exit (E_GRP_UPDATE);
}
if (nflg && (gr_remove (group_name) == 0)) {
fprintf (stderr,
_("%s: cannot remove entry '%s' from %s\n"),
Prog, grp.gr_name, gr_dbname ());
exit (E_GRP_UPDATE);
}
#ifdef SHADOWGRP
/*
* Make sure there was a shadow entry to begin with.
*/
if ( (NULL != osgrp)
&& (pflg || nflg)) {
/*
* Write out the new shadow group entries as well.
*/
if (sgr_update (&sgrp) == 0) {
fprintf (stderr,
_("%s: failed to prepare the new %s entry '%s'\n"),
Prog, sgr_dbname (), sgrp.sg_name);
exit (E_GRP_UPDATE);
}
if (nflg && (sgr_remove (group_name) == 0)) {
fprintf (stderr,
_("%s: cannot remove entry '%s' from %s\n"),
Prog, group_name, sgr_dbname ());
exit (E_GRP_UPDATE);
}
}
#endif /* SHADOWGRP */
}
/*
* remove_usergroup - delete the user's group if it is a usergroup
*
* An usergroup is removed if
* + it has the same name as the user
* + it is the primary group of the user
* + it has no other members
* + it is not the primary group of any other user
*/
static void remove_usergroup (void)
{
const struct group *grp;
const struct passwd *pwd = NULL;
grp = gr_locate (user_name);
if (NULL == grp) {
/* This user has no usergroup. */
return;
}
if (grp->gr_gid != user_gid) {
fprintf (stderr,
_("%s: group %s not removed because it is not the primary group of user %s.\n"),
Prog, grp->gr_name, user_name);
return;
}
if (NULL != grp->gr_mem[0]) {
/* The usergroup has other members. */
fprintf (stderr,
_("%s: group %s not removed because it has other members.\n"),
Prog, grp->gr_name);
return;
}
if (!fflg) {
/*
* Scan the passwd file to check if this group is still
* used as a primary group.
*/
setpwent ();
while ((pwd = getpwent ()) != NULL) {
if (strcmp (pwd->pw_name, user_name) == 0) {
continue;
}
if (pwd->pw_gid == grp->gr_gid) {
fprintf (stderr,
_("%s: group %s is the primary group of another user and is not removed.\n"),
Prog, grp->gr_name);
break;
}
}
endpwent ();
}
if (NULL == pwd) {
/*
* We can remove this group, it is not the primary
* group of any remaining user.
*/
if (gr_remove (user_name) == 0) {
fprintf (stderr,
_("%s: cannot remove entry '%s' from %s\n"),
Prog, user_name, gr_dbname ());
fail_exit (E_GRP_UPDATE);
}
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_GROUP, Prog,
"deleting group",
user_name, AUDIT_NO_ID,
SHADOW_AUDIT_SUCCESS);
#endif /* WITH_AUDIT */
SYSLOG ((LOG_INFO,
"removed group '%s' owned by '%s'\n",
user_name, user_name));
#ifdef SHADOWGRP
if (sgr_locate (user_name) != NULL) {
if (sgr_remove (user_name) == 0) {
fprintf (stderr,
_("%s: cannot remove entry '%s' from %s\n"),
Prog, user_name, sgr_dbname ());
fail_exit (E_GRP_UPDATE);
}
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_GROUP, Prog,
"deleting shadow group",
user_name, AUDIT_NO_ID,
SHADOW_AUDIT_SUCCESS);
#endif /* WITH_AUDIT */
SYSLOG ((LOG_INFO,
"removed shadow group '%s' owned by '%s'\n",
user_name, user_name));
}
#endif /* SHADOWGRP */
}
}
/*
* grp_update - update group file entries
*
* grp_update() updates the new records in the memory databases.
*/
static void grp_update (void)
{
struct group grp;
const struct group *ogrp;
#ifdef SHADOWGRP
struct sgrp sgrp;
const struct sgrp *osgrp = NULL;
#endif /* SHADOWGRP */
/*
* Get the current settings for this group.
*/
ogrp = gr_locate (group_name);
if (NULL == ogrp) {
fprintf (stderr,
_("%s: group '%s' does not exist in %s\n"),
Prog, group_name, gr_dbname ());
exit (E_GRP_UPDATE);
}
grp = *ogrp;
new_grent (&grp);
#ifdef SHADOWGRP
if ( is_shadow_grp
&& (pflg || nflg)) {
osgrp = sgr_locate (group_name);
if (NULL != osgrp) {
sgrp = *osgrp;
new_sgent (&sgrp);
} else if ( pflg
&& (strcmp (grp.gr_passwd, SHADOW_PASSWD_STRING) == 0)) {
static char *empty = NULL;
/* If there is a gshadow file with no entries for
* the group, but the group file indicates a
* shadowed password, we force the creation of a
* gshadow entry when a new password is requested.
*/
memset (&sgrp, 0, sizeof sgrp);
sgrp.sg_name = xstrdup (grp.gr_name);
sgrp.sg_passwd = xstrdup (grp.gr_passwd);
sgrp.sg_adm = ∅
sgrp.sg_mem = dup_list (grp.gr_mem);
new_sgent (&sgrp);
osgrp = &sgrp; /* entry needs to be committed */
}
}
#endif /* SHADOWGRP */
if (gflg) {
update_primary_groups (ogrp->gr_gid, group_newid);
}
/*
* Write out the new group file entry.
*/
if (gr_update (&grp) == 0) {
fprintf (stderr,
_("%s: failed to prepare the new %s entry '%s'\n"),
Prog, gr_dbname (), grp.gr_name);
exit (E_GRP_UPDATE);
}
if (nflg && (gr_remove (group_name) == 0)) {
fprintf (stderr,
_("%s: cannot remove entry '%s' from %s\n"),
Prog, grp.gr_name, gr_dbname ());
exit (E_GRP_UPDATE);
}
#ifdef SHADOWGRP
/*
* Make sure there was a shadow entry to begin with.
*/
if (NULL != osgrp) {
/*
* Write out the new shadow group entries as well.
*/
if (sgr_update (&sgrp) == 0) {
fprintf (stderr,
_("%s: failed to prepare the new %s entry '%s'\n"),
Prog, sgr_dbname (), sgrp.sg_name);
exit (E_GRP_UPDATE);
}
if (nflg && (sgr_remove (group_name) == 0)) {
fprintf (stderr,
_("%s: cannot remove entry '%s' from %s\n"),
Prog, group_name, sgr_dbname ());
exit (E_GRP_UPDATE);
}
}
#endif /* SHADOWGRP */
}
/*
* update_groups - delete user from secondary group set
*
* update_groups() takes the user name that was given and searches
* the group files for membership in any group.
*
* we also check to see if they have any groups they own (the same
* name is their user name) and delete them too (only if USERGROUPS_ENAB
* is enabled).
*/
static void update_groups (void)
{
const struct group *grp;
struct group *ngrp;
struct passwd *pwd;
#ifdef SHADOWGRP
bool deleted_user_group = false;
const struct sgrp *sgrp;
struct sgrp *nsgrp;
#endif /* SHADOWGRP */
/*
* Scan through the entire group file looking for the groups that
* the user is a member of.
*/
for (gr_rewind (), grp = gr_next (); NULL != grp; grp = gr_next ()) {
/*
* See if the user specified this group as one of their
* concurrent groups.
*/
if (!is_on_list (grp->gr_mem, user_name)) {
continue;
}
/*
* Delete the username from the list of group members and
* update the group entry to reflect the change.
*/
ngrp = __gr_dup (grp);
if (NULL == ngrp) {
fprintf (stderr,
_("%s: Out of memory. Cannot update %s.\n"),
Prog, gr_dbname ());
exit (13); /* XXX */
}
ngrp->gr_mem = del_list (ngrp->gr_mem, user_name);
if (gr_update (ngrp) == 0) {
fprintf (stderr,
_("%s: failed to prepare the new %s entry '%s'\n"),
Prog, gr_dbname (), ngrp->gr_name);
exit (E_GRP_UPDATE);
}
/*
* Update the DBM group file with the new entry as well.
*/
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"deleting user from group",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_SUCCESS);
#endif
SYSLOG ((LOG_INFO, "delete '%s' from group '%s'\n",
user_name, ngrp->gr_name));
}
/*
* we've removed their name from all the groups above, so
* now if they have a group with the same name as their
* user name, with no members, we delete it.
* FIXME: below, the check for grp->gr_mem[0] is not sufficient.
* We should retrieve the group with gr_locate and check
* that gr_mem is empty.
*/
grp = xgetgrnam (user_name);
if ( (NULL != grp)
&& getdef_bool ("USERGROUPS_ENAB")
&& ( (NULL == grp->gr_mem[0])
|| ( (NULL == grp->gr_mem[1])
&& (strcmp (grp->gr_mem[0], user_name) == 0)))) {
pwd = NULL;
if (!fflg) {
/*
* Scan the passwd file to check if this group is still
* used as a primary group.
*/
setpwent ();
while ((pwd = getpwent ()) != NULL) {
if (strcmp (pwd->pw_name, user_name) == 0) {
continue;
}
if (pwd->pw_gid == grp->gr_gid) {
fprintf (stderr,
_("%s: group %s is the primary group of another user and is not removed.\n"),
Prog, grp->gr_name);
break;
}
}
endpwent ();
}
if (NULL == pwd) {
/*
* We can remove this group, it is not the primary
* group of any remaining user.
*/
if (gr_remove (grp->gr_name) == 0) {
fprintf (stderr,
_("%s: cannot remove entry '%s' from %s\n"),
Prog, grp->gr_name, gr_dbname ());
fail_exit (E_GRP_UPDATE);
}
#ifdef SHADOWGRP
deleted_user_group = true;
#endif
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_GROUP, Prog,
"deleting group",
grp->gr_name, AUDIT_NO_ID,
SHADOW_AUDIT_SUCCESS);
#endif
SYSLOG ((LOG_INFO,
"removed group '%s' owned by '%s'\n",
grp->gr_name, user_name));
}
}
#ifdef SHADOWGRP
if (!is_shadow_grp) {
return;
}
/*
* Scan through the entire shadow group file looking for the groups
* that the user is a member of. Both the administrative list and
* the ordinary membership list is checked.
*/
for (sgr_rewind (), sgrp = sgr_next ();
NULL != sgrp;
sgrp = sgr_next ()) {
bool was_member, was_admin;
/*
* See if the user specified this group as one of their
* concurrent groups.
*/
was_member = is_on_list (sgrp->sg_mem, user_name);
was_admin = is_on_list (sgrp->sg_adm, user_name);
if (!was_member && !was_admin) {
continue;
}
nsgrp = __sgr_dup (sgrp);
if (NULL == nsgrp) {
fprintf (stderr,
_("%s: Out of memory. Cannot update %s.\n"),
Prog, sgr_dbname ());
exit (13); /* XXX */
}
if (was_member) {
nsgrp->sg_mem = del_list (nsgrp->sg_mem, user_name);
}
if (was_admin) {
nsgrp->sg_adm = del_list (nsgrp->sg_adm, user_name);
}
if (sgr_update (nsgrp) == 0) {
fprintf (stderr,
_("%s: failed to prepare the new %s entry '%s'\n"),
Prog, sgr_dbname (), nsgrp->sg_name);
exit (E_GRP_UPDATE);
}
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"deleting user from shadow group",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_SUCCESS);
#endif
SYSLOG ((LOG_INFO, "delete '%s' from shadow group '%s'\n",
user_name, nsgrp->sg_name));
}
if ( deleted_user_group
&& (sgr_locate (user_name) != NULL)) {
if (sgr_remove (user_name) == 0) {
fprintf (stderr,
_("%s: cannot remove entry '%s' from %s\n"),
Prog, user_name, sgr_dbname ());
fail_exit (E_GRP_UPDATE);
}
}
#endif /* SHADOWGRP */
}
