getpwent / getgrent for system accounts. Trying the low-IDs with
getpwuid / getgrgid should be more efficient on LDAP configured
systems with many accounts.
+ * NEWS, libmisc/find_new_gid.c, libmisc/find_new_uid.c: Since
+ system accounts are allocated from SYS_?ID_MIN to SYS_?ID_MAX in
+ reverse order, accounts are packed close to SYS_?ID_MAX if
+ SYS_?ID_MIN is already used but there are still dome gaps.
2009-07-05 Piarres Beobide <pi+debian@beobide.net>
- addition of system users or groups
* Speed improvement. This should be noticeable in case of LDAP configured
systems. This should impact useradd, groupadd, and newusers
+ * Since system accounts are allocated from SYS_?ID_MIN to SYS_?ID_MAX in
+ reverse order, accounts are packed close to SYS_?ID_MAX if SYS_?ID_MIN
+ is already used but there are still dome gaps.
- su
* Preserve the DISPLAY and XAUTHORITY environment variables. This was
/*@null@*/gid_t const *preferred_gid)
{
const struct group *grp;
- gid_t gid_min, gid_max, group_id;
+ gid_t gid_min, gid_max, group_id, id;
bool *used_gids;
assert (gid != NULL);
gid_min = (gid_t) getdef_ulong ("GID_MIN", 1000UL);
gid_max = (gid_t) getdef_ulong ("GID_MAX", 60000UL);
} else {
- gid_min = (gid_t) getdef_ulong ("SYS_GID_MIN", 1UL);
+ gid_min = (gid_t) getdef_ulong ("SYS_GID_MIN", 101UL);
gid_max = (gid_t) getdef_ulong ("GID_MIN", 1000UL) - 1;
gid_max = (gid_t) getdef_ulong ("SYS_GID_MAX", (unsigned long) gid_max);
}
return 0;
}
- group_id = gid_min;
/*
* Search the entire group file,
* but we also check the local database (gr_rewind/gr_next) in case
* some groups were created but the changes were not committed yet.
*/
- if (sys_group ) {
+ if (sys_group) {
/* setgrent / getgrent / endgrent can be very slow with
* LDAP configurations (and many accounts).
* Since there is a limited amount of IDs to be tested
* for system accounts, we just check the existence
* of IDs with getgrgid.
*/
- for (group_id = gid_min; group_id <= gid_max; group_id++) {
- if (getgrgid (group_id) != NULL) {
+ group_id = gid_max;
+ for (id = gid_max; id >= gid_min; id--) {
+ if (getgrgid (id) != NULL) {
+ group_id = id - 1;
+ used_gids[id] = true;
+ }
+ }
+
+ gr_rewind ();
+ while ((grp = gr_next ()) != NULL) {
+ if ((grp->gr_gid <= group_id) && (grp->gr_gid >= gid_min)) {
+ group_id = grp->gr_gid - 1;
+ }
+ /* create index of used GIDs */
+ if (grp->gr_gid <= gid_max) {
used_gids[grp->gr_gid] = true;
}
}
} else {
+ group_id = gid_min;
setgrent ();
while ((grp = getgrent ()) != NULL) {
if ((grp->gr_gid >= group_id) && (grp->gr_gid <= gid_max)) {
}
}
endgrent ();
- }
- gr_rewind ();
- while ((grp = gr_next ()) != NULL) {
- if ((grp->gr_gid >= group_id) && (grp->gr_gid <= gid_max)) {
- group_id = grp->gr_gid + 1;
- }
- /* create index of used GIDs */
- if (grp->gr_gid <= gid_max) {
- used_gids[grp->gr_gid] = true;
- }
- }
- /* find free system account in reverse order */
- if (sys_group) {
- for (group_id = gid_max; group_id >= gid_min; group_id--) {
- if (false == used_gids[group_id]) {
- break;
+ gr_rewind ();
+ while ((grp = gr_next ()) != NULL) {
+ if ((grp->gr_gid >= group_id) && (grp->gr_gid <= gid_max)) {
+ group_id = grp->gr_gid + 1;
+ }
+ /* create index of used GIDs */
+ if (grp->gr_gid <= gid_max) {
+ used_gids[grp->gr_gid] = true;
}
- }
- if ( group_id < gid_min ) {
- fprintf (stderr,
- _("%s: Can't get unique GID (no more available GIDs)\n"),
- Prog);
- SYSLOG ((LOG_WARN,
- "no more available GID on the system"));
- return -1;
}
}
* will give us GID_MAX+1 even if not unique. Search for the first
* free GID starting with GID_MIN.
*/
- if (group_id == gid_max + 1) {
- for (group_id = gid_min; group_id < gid_max; group_id++) {
- if (false == used_gids[group_id]) {
- break;
+ if (sys_group) {
+ if (group_id == gid_min - 1) {
+ for (group_id = gid_max; group_id >= gid_min; group_id--) {
+ if (false == used_gids[group_id]) {
+ break;
+ }
+ }
+ if ( group_id < gid_min ) {
+ fprintf (stderr,
+ _("%s: Can't get unique system GID (no more available GIDs)\n"),
+ Prog);
+ SYSLOG ((LOG_WARN,
+ "no more available GID on the system"));
+ return -1;
}
}
- if (group_id == gid_max) {
- fprintf (stderr, _("%s: Can't get unique GID (no more available GIDs)\n"), Prog);
- SYSLOG ((LOG_WARN, "no more available GID on the system"));
- return -1;
+ } else {
+ if (group_id == gid_max + 1) {
+ for (group_id = gid_min; group_id < gid_max; group_id++) {
+ if (false == used_gids[group_id]) {
+ break;
+ }
+ }
+ if (group_id == gid_max) {
+ fprintf (stderr,
+ _("%s: Can't get unique GID (no more available GIDs)\n"),
+ Prog);
+ SYSLOG ((LOG_WARN, "no more available GID on the system"));
+ return -1;
+ }
}
}
/*@null@*/uid_t const *preferred_uid)
{
const struct passwd *pwd;
- uid_t uid_min, uid_max, user_id;
+ uid_t uid_min, uid_max, user_id, id;
bool *used_uids;
assert (uid != NULL);
uid_min = (uid_t) getdef_ulong ("UID_MIN", 1000UL);
uid_max = (uid_t) getdef_ulong ("UID_MAX", 60000UL);
} else {
- uid_min = (uid_t) getdef_ulong ("SYS_UID_MIN", 1UL);
+ uid_min = (uid_t) getdef_ulong ("SYS_UID_MIN", 101UL);
uid_max = (uid_t) getdef_ulong ("UID_MIN", 1000UL) - 1;
uid_max = (uid_t) getdef_ulong ("SYS_UID_MAX", (unsigned long) uid_max);
}
return 0;
}
- user_id = uid_min;
/*
* Search the entire password file,
* for system accounts, we just check the existence
* of IDs with getpwuid.
*/
- for (user_id = uid_min; user_id <= uid_max; user_id++) {
- if (getpwuid (user_id) != NULL) {
- used_uids[user_id] = true;
+ user_id = uid_max;
+ for (id = uid_max; id >= uid_min; id--) {
+ if (getpwuid (id) != NULL) {
+ user_id = id - 1;
+ used_uids[id] = true;
+ }
+ }
+
+ pw_rewind ();
+ while ((pwd = pw_next ()) != NULL) {
+ if ((pwd->pw_uid <= user_id) && (pwd->pw_uid >= uid_min)) {
+ user_id = pwd->pw_uid - 1;
+ }
+ /* create index of used UIDs */
+ if (pwd->pw_uid <= uid_max) {
+ used_uids[pwd->pw_uid] = true;
}
}
} else {
+ user_id = uid_min;
setpwent ();
while ((pwd = getpwent ()) != NULL) {
if ((pwd->pw_uid >= user_id) && (pwd->pw_uid <= uid_max)) {
}
}
endpwent ();
- }
- pw_rewind ();
- while ((pwd = pw_next ()) != NULL) {
- if ((pwd->pw_uid >= user_id) && (pwd->pw_uid <= uid_max)) {
- user_id = pwd->pw_uid + 1;
- }
- /* create index of used UIDs */
- if (pwd->pw_uid <= uid_max) {
- used_uids[pwd->pw_uid] = true;
- }
- }
- /* find free system account in reverse order */
- if (sys_user) {
- for (user_id = uid_max; user_id >= uid_min; user_id--) {
- if (false == used_uids[user_id]) {
- break;
+ pw_rewind ();
+ while ((pwd = pw_next ()) != NULL) {
+ if ((pwd->pw_uid >= user_id) && (pwd->pw_uid <= uid_max)) {
+ user_id = pwd->pw_uid + 1;
+ }
+ /* create index of used UIDs */
+ if (pwd->pw_uid <= uid_max) {
+ used_uids[pwd->pw_uid] = true;
}
- }
- if (user_id < uid_min ) {
- fprintf (stderr,
- _("%s: Can't get unique system UID (no more available UIDs)\n"),
- Prog);
- SYSLOG ((LOG_WARN,
- "no more available UID on the system"));
- return -1;
}
}
* will give us UID_MAX+1 even if not unique. Search for the first
* free UID starting with UID_MIN.
*/
- if (user_id == uid_max + 1) {
- for (user_id = uid_min; user_id < uid_max; user_id++) {
- if (false == used_uids[user_id]) {
- break;
+ if (sys_user) {
+ if (user_id == uid_min - 1) {
+ for (user_id = uid_max; user_id >= uid_min; user_id--) {
+ if (false == used_uids[user_id]) {
+ break;
+ }
+ }
+ if (user_id < uid_min ) {
+ fprintf (stderr,
+ _("%s: Can't get unique system UID (no more available UIDs)\n"),
+ Prog);
+ SYSLOG ((LOG_WARN,
+ "no more available UID on the system"));
+ return -1;
}
}
- if (user_id == uid_max) {
- fprintf (stderr, _("%s: Can't get unique UID (no more available UIDs)\n"), Prog);
- SYSLOG ((LOG_WARN, "no more available UID on the system"));
- return -1;
+ } else {
+ if (user_id == uid_max + 1) {
+ for (user_id = uid_min; user_id < uid_max; user_id++) {
+ if (false == used_uids[user_id]) {
+ break;
+ }
+ }
+ if (user_id == uid_max) {
+ fprintf (stderr,
+ _("%s: Can't get unique UID (no more available UIDs)\n"),
+ Prog);
+ SYSLOG ((LOG_WARN, "no more available UID on the system"));
+ return -1;
+ }
}
}
projects / shadow / commitdiff