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useradd: Add support for subordinate user identifiers

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Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2013-01-22 01:17:30 -08:00 committed by Serge Hallyn
parent 7296cbdbfe
commit 87253ca906
1 changed files with 140 additions and 1 deletions
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141
src/useradd.c
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@ -65,6 +65,7 @@
#include "sgroupio.h" #include "sgroupio.h"
#endif #endif
#include "shadowio.h" #include "shadowio.h"
#include "subordinateio.h"
#ifdef WITH_TCB #ifdef WITH_TCB
#include "tcbfuncs.h" #include "tcbfuncs.h"
#endif #endif
@ -121,12 +122,20 @@ static bool is_shadow_pwd;
static bool is_shadow_grp; static bool is_shadow_grp;
static bool sgr_locked = false; static bool sgr_locked = false;
#endif #endif
static bool is_sub_uid = false;
static bool is_sub_gid = false;
static bool pw_locked = false; static bool pw_locked = false;
static bool gr_locked = false; static bool gr_locked = false;
static bool spw_locked = false; static bool spw_locked = false;
static bool sub_uid_locked = false;
static bool sub_gid_locked = false;
static char **user_groups; /* NULL-terminated list */ static char **user_groups; /* NULL-terminated list */
static long sys_ngroups; static long sys_ngroups;
static bool do_grp_update = false; /* group files need to be updated */ static bool do_grp_update = false; /* group files need to be updated */
static uid_t sub_uid_start; /* New subordinate uid range */
static unsigned long sub_uid_count;
static gid_t sub_gid_start; /* New subordinate gid range */
static unsigned long sub_gid_count;
static bool static bool
bflg = false, /* new default root of home directory */ bflg = false, /* new default root of home directory */
@ -168,6 +177,8 @@ static bool home_added = false;
#define E_GRP_UPDATE 10 /* can't update group file */ #define E_GRP_UPDATE 10 /* can't update group file */
#define E_HOMEDIR 12 /* can't create home directory */ #define E_HOMEDIR 12 /* can't create home directory */
#define E_SE_UPDATE 14 /* can't update SELinux user mapping */ #define E_SE_UPDATE 14 /* can't update SELinux user mapping */
#define E_SUB_UID_UPDATE 16 /* can't update the subordinate uid file */
#define E_SUB_GID_UPDATE 18 /* can't update the subordinate gid file */
#define DGROUP "GROUP=" #define DGROUP "GROUP="
#define DHOME "HOME=" #define DHOME "HOME="
@ -268,6 +279,32 @@ static void fail_exit (int code)
} }
} }
#endif #endif
if (sub_uid_locked) {
if (sub_uid_unlock () == 0) {
fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, sub_uid_dbname ());
SYSLOG ((LOG_ERR, "failed to unlock %s", sub_uid_dbname ()));
#ifdef WITH_AUDIT
audit_logger (AUDIT_ADD_USER, Prog,
"unlocking subodinate user file",
user_name, AUDIT_NO_ID,
SHADOW_AUDIT_FAILURE);
#endif
/* continue */
}
}
if (sub_gid_locked) {
if (sub_gid_unlock () == 0) {
fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, sub_gid_dbname ());
SYSLOG ((LOG_ERR, "failed to unlock %s", sub_gid_dbname ()));
#ifdef WITH_AUDIT
audit_logger (AUDIT_ADD_USER, Prog,
"unlocking subodinate group file",
user_name, AUDIT_NO_ID,
SHADOW_AUDIT_FAILURE);
#endif
/* continue */
}
}
#ifdef WITH_AUDIT #ifdef WITH_AUDIT
audit_logger (AUDIT_ADD_USER, Prog, audit_logger (AUDIT_ADD_USER, Prog,
@ -1378,6 +1415,18 @@ static void close_files (void)
} }
#endif #endif
} }
if (is_sub_uid && (sub_uid_close () == 0)) {
fprintf (stderr,
_("%s: failure while writing changes to %s\n"), Prog, sub_uid_dbname ());
SYSLOG ((LOG_ERR, "failure while writing changes to %s", sub_uid_dbname ()));
fail_exit (E_SUB_UID_UPDATE);
}
if (is_sub_gid && (sub_gid_close () == 0)) {
fprintf (stderr,
_("%s: failure while writing changes to %s\n"), Prog, sub_gid_dbname ());
SYSLOG ((LOG_ERR, "failure while writing changes to %s", sub_gid_dbname ()));
fail_exit (E_SUB_GID_UPDATE);
}
if (is_shadow_pwd) { if (is_shadow_pwd) {
if (spw_unlock () == 0) { if (spw_unlock () == 0) {
fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, spw_dbname ()); fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, spw_dbname ());
@ -1432,6 +1481,34 @@ static void close_files (void)
sgr_locked = false; sgr_locked = false;
} }
#endif #endif
if (is_sub_uid) {
if (sub_uid_unlock () == 0) {
fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, sub_uid_dbname ());
SYSLOG ((LOG_ERR, "failed to unlock %s", sub_uid_dbname ()));
#ifdef WITH_AUDIT
audit_logger (AUDIT_ADD_USER, Prog,
"unlocking subordinate user file",
user_name, AUDIT_NO_ID,
SHADOW_AUDIT_FAILURE);
#endif
/* continue */
}
sub_uid_locked = false;
}
if (is_sub_gid) {
if (sub_gid_unlock () == 0) {
fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, sub_gid_dbname ());
SYSLOG ((LOG_ERR, "failed to unlock %s", sub_gid_dbname ()));
#ifdef WITH_AUDIT
audit_logger (AUDIT_ADD_USER, Prog,
"unlocking subordinate group file",
user_name, AUDIT_NO_ID,
SHADOW_AUDIT_FAILURE);
#endif
/* continue */
}
sub_gid_locked = false;
}
} }
/* /*
@ -1486,6 +1563,36 @@ static void open_files (void)
} }
} }
#endif #endif
if (is_sub_uid) {
if (sub_uid_lock () == 0) {
fprintf (stderr,
_("%s: cannot lock %s; try again later.\n"),
Prog, sub_uid_dbname ());
fail_exit (E_SUB_UID_UPDATE);
}
sub_uid_locked = true;
if (sub_uid_open (O_RDWR) == 0) {
fprintf (stderr,
_("%s: cannot open %s\n"),
Prog, sub_uid_dbname ());
fail_exit (E_SUB_UID_UPDATE);
}
}
if (is_sub_gid) {
if (sub_gid_lock () == 0) {
fprintf (stderr,
_("%s: cannot lock %s; try again later.\n"),
Prog, sub_gid_dbname ());
fail_exit (E_SUB_GID_UPDATE);
}
sub_gid_locked = true;
if (sub_gid_open (O_RDWR) == 0) {
fprintf (stderr,
_("%s: cannot open %s\n"),
Prog, sub_gid_dbname ());
fail_exit (E_SUB_GID_UPDATE);
}
}
} }
static void open_shadow (void) static void open_shadow (void)
@ -1732,13 +1839,27 @@ static void usr_update (void)
#endif #endif
fail_exit (E_PW_UPDATE); fail_exit (E_PW_UPDATE);
} }
if (is_sub_uid &&
(sub_uid_add(user_name, sub_uid_start, sub_uid_count) == 0)) {
fprintf (stderr,
_("%s: failed to prepare the new %s entry\n"),
Prog, sub_uid_dbname ());
fail_exit (E_SUB_UID_UPDATE);
}
if (is_sub_gid &&
(sub_gid_add(user_name, sub_gid_start, sub_gid_count) == 0)) {
fprintf (stderr,
_("%s: failed to prepare the new %s entry\n"),
Prog, sub_uid_dbname ());
fail_exit (E_SUB_GID_UPDATE);
}
#ifdef WITH_AUDIT #ifdef WITH_AUDIT
audit_logger (AUDIT_ADD_USER, Prog, audit_logger (AUDIT_ADD_USER, Prog,
"adding user", "adding user",
user_name, (unsigned int) user_id, user_name, (unsigned int) user_id,
SHADOW_AUDIT_SUCCESS); SHADOW_AUDIT_SUCCESS);
#endif #endif
/* /*
* Do any group file updates for this user. * Do any group file updates for this user.
*/ */
@ -1884,6 +2005,8 @@ int main (int argc, char **argv)
#ifdef SHADOWGRP #ifdef SHADOWGRP
is_shadow_grp = sgr_file_present (); is_shadow_grp = sgr_file_present ();
#endif #endif
is_sub_uid = sub_uid_file_present ();
is_sub_gid = sub_gid_file_present ();
get_defaults (); get_defaults ();
@ -2034,6 +2157,22 @@ int main (int argc, char **argv)
grp_add (); grp_add ();
} }
if (is_sub_uid) {
if (find_new_sub_uids(user_name, &sub_uid_start, &sub_uid_count) < 0) {
fprintf (stderr,
_("%s: can't find subordinate user range\n"),
Prog);
fail_exit(E_SUB_UID_UPDATE);
}
}
if (is_sub_gid) {
if (find_new_sub_gids(user_name, &sub_gid_start, &sub_gid_count) < 0) {
fprintf (stderr,
_("%s: can't find subordinate group range\n"),
Prog);
fail_exit(E_SUB_GID_UPDATE);
}
}
usr_update (); usr_update ();
if (mflg) { if (mflg) {