int main (int argc, char **argv)
{
char buf[BUFSIZ];
char *name;
char *newpwd;
char *cp;
#ifdef SHADOWGRP
const struct sgrp *sg;
struct sgrp newsg;
#endif
const struct group *gr;
struct group newgr;
int errors = 0;
int line = 0;
Prog = Basename (argv[0]);
(void) setlocale (LC_ALL, "");
(void) bindtextdomain (PACKAGE, LOCALEDIR);
(void) textdomain (PACKAGE);
process_root_flag ("-R", argc, argv);
process_flags (argc, argv);
OPENLOG ("chgpasswd");
check_perms ();
#ifdef SHADOWGRP
is_shadow_grp = sgr_file_present ();
#endif
open_files ();
/*
* Read each line, separating the group name from the password. The
* group entry for each group will be looked up in the appropriate
* file (gshadow or group) and the password changed.
*/
while (fgets (buf, (int) sizeof buf, stdin) != (char *) 0) {
line++;
cp = strrchr (buf, '\n');
if (NULL != cp) {
*cp = '\0';
} else {
fprintf (stderr, _("%s: line %d: line too long\n"),
Prog, line);
errors++;
continue;
}
/*
* The group's name is the first field. It is separated from
* the password with a ":" character which is replaced with a
* NUL to give the new password. The new password will then
* be encrypted in the normal fashion with a new salt
* generated, unless the '-e' is given, in which case it is
* assumed to already be encrypted.
*/
name = buf;
cp = strchr (name, ':');
if (NULL != cp) {
*cp = '\0';
cp++;
} else {
fprintf (stderr,
_("%s: line %d: missing new password\n"),
Prog, line);
errors++;
continue;
}
newpwd = cp;
if ( (!eflg)
&& ( (NULL == crypt_method)
|| (0 != strcmp (crypt_method, "NONE")))) {
void *arg = NULL;
const char *salt;
if (md5flg) {
crypt_method = "MD5";
}
#ifdef USE_SHA_CRYPT
if (sflg) {
arg = &sha_rounds;
}
#endif
salt = crypt_make_salt (crypt_method, arg);
cp = pw_encrypt (newpwd, salt);
if (NULL == cp) {
fprintf (stderr,
_("%s: failed to crypt password with salt '%s': %s\n"),
Prog, salt, strerror (errno));
fail_exit (1);
}
}
/*
* Get the group file entry for this group. The group must
* already exist.
*/
gr = gr_locate (name);
if (NULL == gr) {
fprintf (stderr,
_("%s: line %d: group '%s' does not exist\n"), Prog,
line, name);
errors++;
continue;
}
#ifdef SHADOWGRP
if (is_shadow_grp) {
/* The gshadow entry should be updated if the
* group entry has a password set to 'x'.
* But on the other hand, if there is already both
* a group and a gshadow password, it's preferable
* to update both.
*/
sg = sgr_locate (name);
if ( (NULL == sg)
&& (strcmp (gr->gr_passwd,
SHADOW_PASSWD_STRING) == 0)) {
static char *empty = NULL;
/* If the password is set to 'x' in
* group, but there are no entries in
* gshadow, create one.
*/
newsg.sg_name = name;
/* newsg.sg_passwd = NULL; will be set later */
newsg.sg_adm = ∅
newsg.sg_mem = dup_list (gr->gr_mem);
sg = &newsg;
}
} else {
sg = NULL;
}
#endif
/*
* The freshly encrypted new password is merged into the
* group's entry.
*/
#ifdef SHADOWGRP
if (NULL != sg) {
newsg = *sg;
newsg.sg_passwd = cp;
}
if ( (NULL == sg)
|| (strcmp (gr->gr_passwd, SHADOW_PASSWD_STRING) != 0))
#endif
{
newgr = *gr;
newgr.gr_passwd = cp;
}
/*
* The updated group file entry is then put back and will
* be written to the group file later, after all the
* other entries have been updated as well.
*/
#ifdef SHADOWGRP
if (NULL != sg) {
if (sgr_update (&newsg) == 0) {
fprintf (stderr,
_("%s: line %d: failed to prepare the new %s entry '%s'\n"),
Prog, line, sgr_dbname (), newsg.sg_name);
errors++;
continue;
}
}
if ( (NULL == sg)
|| (strcmp (gr->gr_passwd, SHADOW_PASSWD_STRING) != 0))
#endif
{
if (gr_update (&newgr) == 0) {
fprintf (stderr,
_("%s: line %d: failed to prepare the new %s entry '%s'\n"),
Prog, line, gr_dbname (), newgr.gr_name);
errors++;
continue;
}
}
}
/*
* Any detected errors will cause the entire set of changes to be
* aborted. Unlocking the group file will cause all of the
* changes to be ignored. Otherwise the file is closed, causing the
* changes to be written out all at once, and then unlocked
* afterwards.
*/
if (0 != errors) {
fprintf (stderr,
_("%s: error detected, changes ignored\n"), Prog);
fail_exit (1);
}
close_files ();
nscd_flush_cache ("group");
return (0);
}
static void get_group (struct group *gr)
#endif
{
struct group const*tmpgr = NULL;
#ifdef SHADOWGRP
struct sgrp const*tmpsg = NULL;
#endif
if (gr_open (O_RDONLY) == 0) {
fprintf (stderr, _("%s: cannot open %s\n"), Prog, gr_dbname ());
SYSLOG ((LOG_WARN, "cannot open %s", gr_dbname ()));
exit (E_NOPERM);
}
tmpgr = gr_locate (group);
if (NULL == tmpgr) {
fprintf (stderr,
_("%s: group '%s' does not exist in %s\n"),
Prog, group, gr_dbname ());
exit (E_BAD_ARG);
}
*gr = *tmpgr;
gr->gr_name = xstrdup (tmpgr->gr_name);
gr->gr_passwd = xstrdup (tmpgr->gr_passwd);
gr->gr_mem = dup_list (tmpgr->gr_mem);
if (gr_close () == 0) {
fprintf (stderr,
_("%s: failure while closing read-only %s\n"),
Prog, gr_dbname ());
SYSLOG ((LOG_ERR,
"failure while closing read-only %s",
gr_dbname ()));
exit (E_NOPERM);
}
#ifdef SHADOWGRP
if (is_shadowgrp) {
if (sgr_open (O_RDONLY) == 0) {
fprintf (stderr,
_("%s: cannot open %s\n"),
Prog, sgr_dbname ());
SYSLOG ((LOG_WARN, "cannot open %s", sgr_dbname ()));
exit (E_NOPERM);
}
tmpsg = sgr_locate (group);
if (NULL != tmpsg) {
*sg = *tmpsg;
sg->sg_name = xstrdup (tmpsg->sg_name);
sg->sg_passwd = xstrdup (tmpsg->sg_passwd);
sg->sg_mem = dup_list (tmpsg->sg_mem);
sg->sg_adm = dup_list (tmpsg->sg_adm);
} else {
sg->sg_name = xstrdup (group);
sg->sg_passwd = gr->gr_passwd;
gr->gr_passwd = SHADOW_PASSWD_STRING; /* XXX warning: const */
sg->sg_mem = dup_list (gr->gr_mem);
sg->sg_adm = (char **) xmalloc (sizeof (char *) * 2);
#ifdef FIRST_MEMBER_IS_ADMIN
if (sg->sg_mem[0]) {
sg->sg_adm[0] = xstrdup (sg->sg_mem[0]);
sg->sg_adm[1] = NULL;
} else
#endif
{
sg->sg_adm[0] = NULL;
}
}
if (sgr_close () == 0) {
fprintf (stderr,
_("%s: failure while closing read-only %s\n"),
Prog, sgr_dbname ());
SYSLOG ((LOG_ERR,
"failure while closing read-only %s",
sgr_dbname ()));
exit (E_NOPERM);
}
}
#endif /* SHADOWGRP */
}
/*
* add_group - create a new group or add a user to an existing group
*/
static int add_group (const char *name, const char *gid, gid_t *ngid, uid_t uid)
{
const struct group *grp;
struct group grent;
char *members[1];
#ifdef SHADOWGRP
const struct sgrp *sg;
#endif
/*
* Start by seeing if the named group already exists. This will be
* very easy to deal with if it does.
*/
grp = getgrnam (gid);
if (NULL == grp) {
grp = gr_locate (gid);
}
if (NULL != grp) {
/* The user will use this ID for her primary group */
*ngid = grp->gr_gid;
/* Don't check gshadow */
return 0;
}
if (isdigit (gid[0])) {
/*
* The GID is a number, which means either this is a brand
* new group, or an existing group.
*/
if (get_gid (gid, &grent.gr_gid) == 0) {
fprintf (stderr,
_("%s: invalid group ID '%s'\n"),
Prog, gid);
return -1;
}
/* Look in both the system database (getgrgid) and in the
* internal database (gr_locate_gid), which may contain
* uncommitted changes */
if ( (getgrgid ((gid_t) grent.gr_gid) != NULL)
|| (gr_locate_gid ((gid_t) grent.gr_gid) != NULL)) {
/* The user will use this ID for her
* primary group */
*ngid = (gid_t) grent.gr_gid;
return 0;
}
/* Do not create groups with GID == (gid_t)-1 */
if (grent.gr_gid == (gid_t)-1) {
fprintf (stderr,
_("%s: invalid group ID '%s'\n"),
Prog, gid);
return -1;
}
} else {
/* The gid parameter can be "" or a name which is not
* already the name of an existing group.
* In both cases, figure out what group ID can be used.
*/
if (find_new_gid(rflg, &grent.gr_gid, &uid) < 0) {
return -1;
}
}
/*
* Now I have all of the fields required to create the new group.
*/
if (('\0' != gid[0]) && (!isdigit (gid[0]))) {
grent.gr_name = xstrdup (gid);
} else {
grent.gr_name = xstrdup (name);
/* FIXME: check if the group exists */
}
/* Check if this is a valid group name */
if (!is_valid_group_name (grent.gr_name)) {
fprintf (stderr,
_("%s: invalid group name '%s'\n"),
Prog, grent.gr_name);
if (grent.gr_name)
free (grent.gr_name);
return -1;
}
grent.gr_passwd = "*"; /* XXX warning: const */
members[0] = NULL;
grent.gr_mem = members;
*ngid = grent.gr_gid;
#ifdef SHADOWGRP
if (is_shadow_grp) {
sg = sgr_locate (grent.gr_name);
if (NULL != sg) {
fprintf (stderr,
_("%s: group '%s' is a shadow group, but does not exist in /etc/group\n"),
Prog, grent.gr_name);
return -1;
}
}
#endif
#ifdef SHADOWGRP
if (is_shadow_grp) {
struct sgrp sgrent;
char *admins[1];
sgrent.sg_name = grent.gr_name;
sgrent.sg_passwd = "*"; /* XXX warning: const */
grent.gr_passwd = "x"; /* XXX warning: const */
admins[0] = NULL;
sgrent.sg_adm = admins;
sgrent.sg_mem = members;
if (sgr_update (&sgrent) == 0) {
return -1;
}
}
#endif
if (gr_update (&grent) == 0) {
return -1;
}
return 0;
}
/*
* check_sgr_file - check the content of the shadowed group file (gshadow)
*/
static void check_sgr_file (int *errors, bool *changed)
{
struct group *grp;
struct commonio_entry *sge, *tsge;
struct sgrp *sgr;
/*
* Loop through the entire shadow group file.
*/
for (sge = __sgr_get_head (); NULL != sge; sge = sge->next) {
/*
* Start with the entries that are completely corrupt. They
* have no (struct sgrp) entry because they couldn't be
* parsed properly.
*/
if (NULL == sge->eptr) {
/*
* Tell the user this entire line is bogus and ask
* them to delete it.
*/
(void) puts (_("invalid shadow group file entry"));
printf (_("delete line '%s'? "), sge->line);
*errors += 1;
/*
* prompt the user to delete the entry or not
*/
if (!yes_or_no (read_only)) {
continue;
}
/*
* All shadow group file deletions wind up here.
* This code removes the current entry from the
* linked list. When done, it skips back to the top
* of the loop to try out the next list element.
*/
delete_sg:
SYSLOG ((LOG_INFO, "delete shadow line '%s'",
sge->line));
*changed = true;
__sgr_del_entry (sge);
continue;
}
/*
* Shadow group structure is good, start using it.
*/
sgr = sge->eptr;
/*
* Make sure this entry has a unique name.
*/
for (tsge = __sgr_get_head (); NULL != tsge; tsge = tsge->next) {
const struct sgrp *ent = tsge->eptr;
/*
* Don't check this entry
*/
if (tsge == sge) {
continue;
}
/*
* Don't check invalid entries.
*/
if (NULL == ent) {
continue;
}
if (strcmp (sgr->sg_name, ent->sg_name) != 0) {
continue;
}
/*
* Tell the user this entry is a duplicate of
* another and ask them to delete it.
*/
(void) puts (_("duplicate shadow group entry"));
printf (_("delete line '%s'? "), sge->line);
*errors += 1;
/*
* prompt the user to delete the entry or not
*/
if (yes_or_no (read_only)) {
goto delete_sg;
}
}
/*
* Make sure this entry exists in the /etc/group file.
*/
grp = (struct group *) gr_locate (sgr->sg_name);
if (grp == NULL) {
printf (_("no matching group file entry in %s\n"),
grp_file);
printf (_("delete line '%s'? "), sge->line);
*errors += 1;
if (yes_or_no (read_only)) {
goto delete_sg;
}
} else {
/**
* Verify that the all members defined in /etc/gshadow are also
* present in /etc/group.
*/
compare_members_lists (sgr->sg_name,
sgr->sg_mem, grp->gr_mem,
sgr_file, grp_file);
}
/*
* Make sure each administrator exists
*/
if (check_members (sgr->sg_name, sgr->sg_adm,
_("shadow group %s: no administrative user %s\n"),
_("delete administrative member '%s'? "),
"delete admin '%s' from shadow group '%s'",
errors) == 1) {
*changed = true;
sge->changed = true;
__sgr_set_changed ();
}
/*
* Make sure each member exists
*/
if (check_members (sgr->sg_name, sgr->sg_mem,
_("shadow group %s: no user %s\n"),
_("delete member '%s'? "),
"delete member '%s' from shadow group '%s'",
errors) == 1) {
*changed = true;
sge->changed = true;
__sgr_set_changed ();
}
}
}
/*
* 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 */
}
/*
* 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 */
}
/*
* 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 */
}
}
int main (int argc, char **argv)
{
const struct group *gr;
struct group grent;
const struct sgrp *sg;
struct sgrp sgent;
Prog = Basename (argv[0]);
(void) setlocale (LC_ALL, "");
(void) bindtextdomain (PACKAGE, LOCALEDIR);
(void) textdomain (PACKAGE);
process_root_flag ("-R", argc, argv);
OPENLOG ("grpconv");
process_flags (argc, argv);
if (gr_lock () == 0) {
fprintf (stderr,
_("%s: cannot lock %s; try again later.\n"),
Prog, gr_dbname ());
fail_exit (5);
}
gr_locked = true;
if (gr_open (O_CREAT | O_RDWR) == 0) {
fprintf (stderr, _("%s: cannot open %s\n"), Prog, gr_dbname ());
fail_exit (1);
}
if (sgr_lock () == 0) {
fprintf (stderr,
_("%s: cannot lock %s; try again later.\n"),
Prog, sgr_dbname ());
fail_exit (5);
}
sgr_locked = true;
if (sgr_open (O_CREAT | O_RDWR) == 0) {
fprintf (stderr, _("%s: cannot open %s\n"), Prog, sgr_dbname ());
fail_exit (1);
}
/*
* Remove /etc/gshadow entries for groups not in /etc/group.
*/
(void) sgr_rewind ();
while ((sg = sgr_next ()) != NULL) {
if (gr_locate (sg->sg_name) != NULL) {
continue;
}
if (sgr_remove (sg->sg_name) == 0) {
/*
* This shouldn't happen (the entry exists) but...
*/
fprintf (stderr,
_("%s: cannot remove entry '%s' from %s\n"),
Prog, sg->sg_name, sgr_dbname ());
fail_exit (3);
}
}
/*
* Update shadow group passwords if non-shadow password is not "x".
* Add any missing shadow group entries.
*/
(void) gr_rewind ();
while ((gr = gr_next ()) != NULL) {
sg = sgr_locate (gr->gr_name);
if (NULL != sg) {
/* update existing shadow group entry */
sgent = *sg;
if (strcmp (gr->gr_passwd, SHADOW_PASSWD_STRING) != 0)
sgent.sg_passwd = gr->gr_passwd;
} else {
static char *empty = 0;
/* add new shadow group entry */
memset (&sgent, 0, sizeof sgent);
sgent.sg_name = gr->gr_name;
sgent.sg_passwd = gr->gr_passwd;
sgent.sg_adm = ∅
}
/*
* XXX - sg_mem is redundant, it is currently always a copy
* of gr_mem. Very few programs actually use sg_mem, and all
* of them are in the shadow suite. Maybe this field could
* be used for something else? Any suggestions?
*/
sgent.sg_mem = gr->gr_mem;
if (sgr_update (&sgent) == 0) {
fprintf (stderr,
_("%s: failed to prepare the new %s entry '%s'\n"),
Prog, sgr_dbname (), sgent.sg_name);
fail_exit (3);
}
/* remove password from /etc/group */
grent = *gr;
grent.gr_passwd = SHADOW_PASSWD_STRING; /* XXX warning: const */
if (gr_update (&grent) == 0) {
fprintf (stderr,
_("%s: failed to prepare the new %s entry '%s'\n"),
Prog, gr_dbname (), grent.gr_name);
fail_exit (3);
}
}
if (sgr_close () == 0) {
fprintf (stderr,
_("%s: failure while writing changes to %s\n"),
Prog, sgr_dbname ());
SYSLOG ((LOG_ERR, "failure while writing changes to %s", sgr_dbname ()));
fail_exit (3);
}
if (gr_close () == 0) {
fprintf (stderr,
_("%s: failure while writing changes to %s\n"),
Prog, gr_dbname ());
SYSLOG ((LOG_ERR, "failure while writing changes to %s", gr_dbname ()));
fail_exit (3);
}
if (sgr_unlock () == 0) {
fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, sgr_dbname ());
SYSLOG ((LOG_ERR, "failed to unlock %s", sgr_dbname ()));
/* continue */
}
if (gr_unlock () == 0) {
fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, gr_dbname ());
SYSLOG ((LOG_ERR, "failed to unlock %s", gr_dbname ()));
/* continue */
}
nscd_flush_cache ("group");
return 0;
}
/*
* grpck - verify group file integrity
*/
int main (int argc, char **argv)
{
int arg;
int errors = 0;
int deleted = 0;
int i;
struct commonio_entry *gre, *tgre;
struct group *grp;
int sort_mode = 0;
#ifdef SHADOWGRP
struct commonio_entry *sge, *tsge;
struct sgrp *sgr;
int is_shadow = 0;
#endif
/*
* Get my name so that I can use it to report errors.
*/
Prog = Basename (argv[0]);
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
OPENLOG ("grpck");
/*
* Parse the command line arguments
*/
while ((arg = getopt (argc, argv, "qrs")) != EOF) {
switch (arg) {
case 'q':
/* quiet - ignored for now */
break;
case 'r':
read_only = 1;
break;
case 's':
sort_mode = 1;
break;
default:
usage ();
}
}
if (sort_mode && read_only) {
fprintf (stderr, _("%s: -s and -r are incompatibile\n"), Prog);
exit (E_USAGE);
}
/*
* Make certain we have the right number of arguments
*/
#ifdef SHADOWGRP
if (optind != argc && optind + 1 != argc && optind + 2 != argc)
#else
if (optind != argc && optind + 1 != argc)
#endif
usage ();
/*
* If there are two left over filenames, use those as the group and
* group password filenames.
*/
if (optind != argc) {
grp_file = argv[optind];
gr_name (grp_file);
}
#ifdef SHADOWGRP
if (optind + 2 == argc) {
sgr_file = argv[optind + 1];
sgr_name (sgr_file);
is_shadow = 1;
} else if (optind == argc)
is_shadow = sgr_file_present ();
#endif
/*
* Lock the files if we aren't in "read-only" mode
*/
if (!read_only) {
if (!gr_lock ()) {
fprintf (stderr, _("%s: cannot lock file %s\n"),
Prog, grp_file);
if (optind == argc)
SYSLOG ((LOG_WARN, "cannot lock %s", grp_file));
closelog ();
exit (E_CANT_LOCK);
}
#ifdef SHADOWGRP
if (is_shadow && !sgr_lock ()) {
fprintf (stderr, _("%s: cannot lock file %s\n"),
Prog, sgr_file);
if (optind == argc)
SYSLOG ((LOG_WARN, "cannot lock %s", sgr_file));
closelog ();
exit (E_CANT_LOCK);
}
#endif
}
/*
* Open the files. Use O_RDONLY if we are in read_only mode,
* O_RDWR otherwise.
*/
if (!gr_open (read_only ? O_RDONLY : O_RDWR)) {
fprintf (stderr, _("%s: cannot open file %s\n"), Prog,
grp_file);
if (optind == argc)
SYSLOG ((LOG_WARN, "cannot open %s", grp_file));
closelog ();
exit (E_CANT_OPEN);
}
#ifdef SHADOWGRP
if (is_shadow && !sgr_open (read_only ? O_RDONLY : O_RDWR)) {
fprintf (stderr, _("%s: cannot open file %s\n"), Prog,
sgr_file);
if (optind == argc)
SYSLOG ((LOG_WARN, "cannot open %s", sgr_file));
closelog ();
exit (E_CANT_OPEN);
}
#endif
if (sort_mode) {
gr_sort ();
#ifdef SHADOWGRP
if (is_shadow)
sgr_sort ();
#endif
goto write_and_bye;
}
/*
* Loop through the entire group file.
*/
for (gre = __gr_get_head (); gre; gre = gre->next) {
/*
* Skip all NIS entries.
*/
if (gre->line[0] == '+' || gre->line[0] == '-')
continue;
/*
* Start with the entries that are completely corrupt. They
* have no (struct group) entry because they couldn't be
* parsed properly.
*/
if (!gre->eptr) {
/*
* Tell the user this entire line is bogus and ask
* them to delete it.
*/
printf (_("invalid group file entry\n"));
printf (_("delete line `%s'? "), gre->line);
errors++;
/*
* prompt the user to delete the entry or not
*/
if (!yes_or_no ())
continue;
/*
* All group file deletions wind up here. This code
* removes the current entry from the linked list.
* When done, it skips back to the top of the loop
* to try out the next list element.
*/
delete_gr:
SYSLOG ((LOG_INFO, "delete group line `%s'",
gre->line));
deleted++;
__gr_del_entry (gre);
continue;
}
/*
* Group structure is good, start using it.
*/
grp = gre->eptr;
/*
* Make sure this entry has a unique name.
*/
for (tgre = __gr_get_head (); tgre; tgre = tgre->next) {
const struct group *ent = tgre->eptr;
/*
* Don't check this entry
*/
if (tgre == gre)
continue;
/*
* Don't check invalid entries.
*/
if (!ent)
continue;
if (strcmp (grp->gr_name, ent->gr_name) != 0)
continue;
/*
* Tell the user this entry is a duplicate of
* another and ask them to delete it.
*/
printf (_("duplicate group entry\n"));
printf (_("delete line `%s'? "), gre->line);
errors++;
/*
* prompt the user to delete the entry or not
*/
if (yes_or_no ())
goto delete_gr;
}
/*
* Check for invalid group names. --marekm
*/
if (!check_group_name (grp->gr_name)) {
errors++;
printf (_("invalid group name `%s'\n"), grp->gr_name);
}
/*
* Workaround for a NYS libc 5.3.12 bug on RedHat 4.2 -
* groups with no members are returned as groups with one
* member "", causing grpck to fail. --marekm
*/
if (grp->gr_mem[0] && !grp->gr_mem[1]
&& *(grp->gr_mem[0]) == '\0')
grp->gr_mem[0] = (char *) 0;
/*
* Make sure each member exists
*/
for (i = 0; grp->gr_mem[i]; i++) {
if (getpwnam (grp->gr_mem[i]))
continue;
/*
* Can't find this user. Remove them
* from the list.
*/
errors++;
printf (_("group %s: no user %s\n"),
grp->gr_name, grp->gr_mem[i]);
printf (_("delete member `%s'? "), grp->gr_mem[i]);
if (!yes_or_no ())
continue;
SYSLOG ((LOG_INFO, "delete member `%s' group `%s'",
grp->gr_mem[i], grp->gr_name));
deleted++;
delete_member (grp->gr_mem, grp->gr_mem[i]);
gre->changed = 1;
__gr_set_changed ();
}
}
#ifdef SHADOWGRP
if (!is_shadow)
goto shadow_done;
/*
* Loop through the entire shadow group file.
*/
for (sge = __sgr_get_head (); sge; sge = sge->next) {
/*
* Start with the entries that are completely corrupt. They
* have no (struct sgrp) entry because they couldn't be
* parsed properly.
*/
if (!sge->eptr) {
/*
* Tell the user this entire line is bogus and ask
* them to delete it.
*/
printf (_("invalid shadow group file entry\n"));
printf (_("delete line `%s'? "), sge->line);
errors++;
/*
* prompt the user to delete the entry or not
*/
if (!yes_or_no ())
continue;
/*
* All shadow group file deletions wind up here.
* This code removes the current entry from the
* linked list. When done, it skips back to the top
* of the loop to try out the next list element.
*/
delete_sg:
SYSLOG ((LOG_INFO, "delete shadow line `%s'",
sge->line));
deleted++;
__sgr_del_entry (sge);
continue;
}
/*
* Shadow group structure is good, start using it.
*/
sgr = sge->eptr;
/*
* Make sure this entry has a unique name.
*/
for (tsge = __sgr_get_head (); tsge; tsge = tsge->next) {
const struct sgrp *ent = tsge->eptr;
/*
* Don't check this entry
*/
if (tsge == sge)
continue;
/*
* Don't check invalid entries.
*/
if (!ent)
continue;
if (strcmp (sgr->sg_name, ent->sg_name) != 0)
continue;
/*
* Tell the user this entry is a duplicate of
* another and ask them to delete it.
*/
printf (_("duplicate shadow group entry\n"));
printf (_("delete line `%s'? "), sge->line);
errors++;
/*
* prompt the user to delete the entry or not
*/
if (yes_or_no ())
goto delete_sg;
}
/*
* Make sure this entry exists in the /etc/group file.
*/
if (!gr_locate (sgr->sg_name)) {
printf (_("no matching group file entry\n"));
printf (_("delete line `%s'? "), sge->line);
errors++;
if (yes_or_no ())
goto delete_sg;
}
/*
* Make sure each administrator exists
*/
for (i = 0; sgr->sg_adm[i]; i++) {
if (getpwnam (sgr->sg_adm[i]))
continue;
/*
* Can't find this user. Remove them
* from the list.
*/
errors++;
printf (_
("shadow group %s: no administrative user %s\n"),
sgr->sg_name, sgr->sg_adm[i]);
printf (_("delete administrative member `%s'? "),
sgr->sg_adm[i]);
if (!yes_or_no ())
continue;
SYSLOG ((LOG_INFO,
"delete admin `%s' from shadow group `%s'",
sgr->sg_adm[i], sgr->sg_name));
deleted++;
delete_member (sgr->sg_adm, sgr->sg_adm[i]);
sge->changed = 1;
__sgr_set_changed ();
}
/*
* Make sure each member exists
*/
for (i = 0; sgr->sg_mem[i]; i++) {
if (getpwnam (sgr->sg_mem[i]))
continue;
/*
* Can't find this user. Remove them from the list.
*/
errors++;
printf (_("shadow group %s: no user %s\n"),
sgr->sg_name, sgr->sg_mem[i]);
printf (_("delete member `%s'? "), sgr->sg_mem[i]);
if (!yes_or_no ())
continue;
SYSLOG ((LOG_INFO,
"delete member `%s' from shadow group `%s'",
sgr->sg_mem[i], sgr->sg_name));
deleted++;
delete_member (sgr->sg_mem, sgr->sg_mem[i]);
sge->changed = 1;
__sgr_set_changed ();
}
}
shadow_done:
#endif /* SHADOWGRP */
/*
* All done. If there were no deletions we can just abandon any
* changes to the files.
*/
if (deleted) {
write_and_bye:
if (!gr_close ()) {
fprintf (stderr, _("%s: cannot update file %s\n"),
Prog, grp_file);
exit (E_CANT_UPDATE);
}
#ifdef SHADOWGRP
if (is_shadow && !sgr_close ()) {
fprintf (stderr, _("%s: cannot update file %s\n"),
Prog, sgr_file);
exit (E_CANT_UPDATE);
}
#endif
}
/*
* Don't be anti-social - unlock the files when you're done.
*/
#ifdef SHADOWGRP
if (is_shadow)
sgr_unlock ();
#endif
(void) gr_unlock ();
nscd_flush_cache ("group");
/*
* Tell the user what we did and exit.
*/
if (errors)
printf (deleted ?
_("%s: the files have been updated\n") :
_("%s: no changes\n"), Prog);
exit (errors ? E_BAD_ENTRY : E_OKAY);
}
