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userdel: Add support for removing subordinate user and group ids.

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Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman
2013-01-22 01:16:51 -08:00
committed by Serge Hallyn
parent a8f26262cf
commit 7296cbdbfe
1 changed files with 115 additions and 0 deletions
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115
src/userdel.c
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@@ -65,6 +65,7 @@
#endif /* WITH_TCB */
/*@-exitarg@*/
#include "exitcodes.h"
#include "subordinateio.h"
/*
* exit status values
@@ -75,6 +76,8 @@
#define E_GRP_UPDATE 10 /* can't update group file */
#define E_HOMEDIR 12 /* can't remove home directory */
#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 */
/*
* Global variables
@@ -96,9 +99,13 @@ static bool is_shadow_pwd;
static bool is_shadow_grp;
static bool sgr_locked = false;
#endif /* SHADOWGRP */
static bool is_sub_uid;
static bool is_sub_gid;
static bool pw_locked = false;
static bool gr_locked = false;
static bool spw_locked = false;
static bool sub_uid_locked = false;
static bool sub_gid_locked = false;
/* local function prototypes */
static void usage (int status);
@@ -437,6 +444,34 @@ static void close_files (void)
sgr_locked = false;
}
#endif /* SHADOWGRP */
if (is_sub_uid) {
if (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 (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 ()));
/* continue */
}
sub_uid_locked = false;
}
if (is_sub_gid) {
if (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 (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 ()));
/* continue */
}
sub_gid_locked = false;
}
}
/*
@@ -474,6 +509,20 @@ static void fail_exit (int code)
}
}
#endif /* SHADOWGRP */
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 ()));
/* 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 ()));
/* continue */
}
}
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
@@ -595,6 +644,58 @@ static void open_files (void)
}
}
#endif /* SHADOWGRP */
if (is_sub_uid) {
if (sub_uid_lock () == 0) {
fprintf (stderr,
_("%s: cannot lock %s; try again later.\n"),
Prog, sub_uid_dbname ());
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"locking subordinate user file",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_FAILURE);
#endif /* WITH_AUDIT */
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 ());
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"opening subordinate user file",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_FAILURE);
#endif /* WITH_AUDIT */
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 ());
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"locking subordinate group file",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_FAILURE);
#endif /* WITH_AUDIT */
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 ());
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"opening subordinate group file",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_FAILURE);
#endif /* WITH_AUDIT */
fail_exit (E_SUB_GID_UPDATE);
}
}
}
/*
@@ -619,6 +720,18 @@ static void update_user (void)
Prog, user_name, spw_dbname ());
fail_exit (E_PW_UPDATE);
}
if (is_sub_uid && sub_uid_remove(user_name, 0, ULONG_MAX) == 0) {
fprintf (stderr,
_("%s: cannot remove entry %lu from %s\n"),
Prog, (unsigned long)user_id, sub_uid_dbname ());
fail_exit (E_SUB_UID_UPDATE);
}
if (is_sub_gid && sub_gid_remove(user_name, 0, ULONG_MAX) == 0) {
fprintf (stderr,
_("%s: cannot remove entry %lu from %s\n"),
Prog, (unsigned long)user_id, sub_gid_dbname ());
fail_exit (E_SUB_GID_UPDATE);
}
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"deleting user entries",
@@ -966,6 +1079,8 @@ int main (int argc, char **argv)
#ifdef SHADOWGRP
is_shadow_grp = sgr_file_present ();
#endif /* SHADOWGRP */
is_sub_uid = sub_uid_file_present ();
is_sub_gid = sub_gid_file_present ();
/*
* Start with a quick check to see if the user exists.