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-rw-r--r--src/sysusers/sysusers.c255
1 files changed, 238 insertions, 17 deletions
diff --git a/src/sysusers/sysusers.c b/src/sysusers/sysusers.c
index 446b36eb2b..7daea28073 100644
--- a/src/sysusers/sysusers.c
+++ b/src/sysusers/sysusers.c
@@ -23,6 +23,7 @@
#include <pwd.h>
#include <grp.h>
#include <shadow.h>
+#include <gshadow.h>
#include <getopt.h>
#include <utmp.h>
@@ -298,22 +299,70 @@ static int putgrent_with_members(const struct group *gr, FILE *group) {
return 0;
}
+static int putsgent_with_members(const struct sgrp *sg, FILE *gshadow) {
+ char **a;
+
+ assert(sg);
+ assert(gshadow);
+
+ a = hashmap_get(members, sg->sg_namp);
+ if (a) {
+ _cleanup_strv_free_ char **l = NULL;
+ bool added = false;
+ char **i;
+
+ l = strv_copy(sg->sg_mem);
+ if (!l)
+ return -ENOMEM;
+
+ STRV_FOREACH(i, a) {
+ if (strv_find(l, *i))
+ continue;
+
+ if (strv_extend(&l, *i) < 0)
+ return -ENOMEM;
+
+ added = true;
+ }
+
+ if (added) {
+ struct sgrp t;
+
+ strv_uniq(l);
+ strv_sort(l);
+
+ t = *sg;
+ t.sg_mem = l;
+
+ errno = 0;
+ if (putsgent(&t, gshadow) != 0)
+ return errno ? -errno : -EIO;
+
+ return 1;
+ }
+ }
+
+ errno = 0;
+ if (putsgent(sg, gshadow) != 0)
+ return errno ? -errno : -EIO;
+
+ return 0;
+}
+
static int write_files(void) {
- _cleanup_fclose_ FILE *passwd = NULL, *group = NULL;
- _cleanup_free_ char *passwd_tmp = NULL, *group_tmp = NULL;
- const char *passwd_path = NULL, *group_path = NULL;
+ _cleanup_fclose_ FILE *passwd = NULL, *group = NULL, *shadow = NULL, *gshadow = NULL;
+ _cleanup_free_ char *passwd_tmp = NULL, *group_tmp = NULL, *shadow_tmp = NULL, *gshadow_tmp = NULL;
+ const char *passwd_path = NULL, *group_path = NULL, *shadow_path = NULL, *gshadow_path = NULL;
bool group_changed = false;
Iterator iterator;
Item *i;
int r;
- /* We don't patch /etc/shadow or /etc/gshadow here, since we
- * only create user accounts without passwords anyway. */
-
if (hashmap_size(todo_gids) > 0 || hashmap_size(members) > 0) {
_cleanup_fclose_ FILE *original = NULL;
+ /* First we update the actual group list file */
group_path = fix_root("/etc/group");
r = fopen_temporary_label("/etc/group", group_path, &group, &group_tmp);
if (r < 0)
@@ -352,7 +401,6 @@ static int write_files(void) {
r = putgrent_with_members(gr, group);
if (r < 0)
goto finish;
-
if (r > 0)
group_changed = true;
@@ -385,11 +433,77 @@ static int write_files(void) {
r = fflush_and_check(group);
if (r < 0)
goto finish;
+
+ if (original) {
+ fclose(original);
+ original = NULL;
+ }
+
+ /* OK, now also update the shadow file for the group list */
+ gshadow_path = fix_root("/etc/gshadow");
+ r = fopen_temporary_label("/etc/gshadow", gshadow_path, &gshadow, &gshadow_tmp);
+ if (r < 0)
+ goto finish;
+
+ if (fchmod(fileno(gshadow), 0000) < 0) {
+ r = -errno;
+ goto finish;
+ }
+
+ original = fopen(gshadow_path, "re");
+ if (original) {
+ struct sgrp *sg;
+
+ errno = 0;
+ while ((sg = fgetsgent(original))) {
+
+ i = hashmap_get(groups, sg->sg_namp);
+ if (i && i->todo_group) {
+ r = -EEXIST;
+ goto finish;
+ }
+
+ r = putsgent_with_members(sg, gshadow);
+ if (r < 0)
+ goto finish;
+ if (r > 0)
+ group_changed = true;
+
+ errno = 0;
+ }
+ if (!IN_SET(errno, 0, ENOENT)) {
+ r = -errno;
+ goto finish;
+ }
+
+ } else if (errno != ENOENT) {
+ r = -errno;
+ goto finish;
+ }
+
+ HASHMAP_FOREACH(i, todo_gids, iterator) {
+ struct sgrp n = {
+ .sg_namp = i->name,
+ .sg_passwd = (char*) "!!",
+ };
+
+ r = putsgent_with_members(&n, gshadow);
+ if (r < 0)
+ goto finish;
+
+ group_changed = true;
+ }
+
+ r = fflush_and_check(gshadow);
+ if (r < 0)
+ goto finish;
}
if (hashmap_size(todo_uids) > 0) {
_cleanup_fclose_ FILE *original = NULL;
+ long lstchg;
+ /* First we update the user database itself */
passwd_path = fix_root("/etc/passwd");
r = fopen_temporary_label("/etc/passwd", passwd_path, &passwd, &passwd_tmp);
if (r < 0)
@@ -466,13 +580,91 @@ static int write_files(void) {
r = fflush_and_check(passwd);
if (r < 0)
goto finish;
- }
- /* Make a backup of the old files */
- if (group && group_changed) {
- r = make_backup("/etc/group", group_path);
+ if (original) {
+ fclose(original);
+ original = NULL;
+ }
+
+ /* The we update the shadow database */
+ shadow_path = fix_root("/etc/shadow");
+ r = fopen_temporary_label("/etc/shadow", shadow_path, &shadow, &shadow_tmp);
if (r < 0)
goto finish;
+
+ if (fchmod(fileno(shadow), 0000) < 0) {
+ r = -errno;
+ goto finish;
+ }
+
+ original = fopen(shadow_path, "re");
+ if (original) {
+ struct spwd *sp;
+
+ errno = 0;
+ while ((sp = fgetspent(original))) {
+
+ i = hashmap_get(users, sp->sp_namp);
+ if (i && i->todo_user) {
+ r = -EEXIST;
+ goto finish;
+ }
+
+ errno = 0;
+ if (putspent(sp, shadow) < 0) {
+ r = errno ? -errno : -EIO;
+ goto finish;
+ }
+
+ errno = 0;
+ }
+ if (!IN_SET(errno, 0, ENOENT)) {
+ r = -errno;
+ goto finish;
+ }
+ } else if (errno != ENOENT) {
+ r = -errno;
+ goto finish;
+ }
+
+ lstchg = (long) (now(CLOCK_REALTIME) / USEC_PER_DAY);
+ HASHMAP_FOREACH(i, todo_uids, iterator) {
+ struct spwd n = {
+ .sp_namp = i->name,
+ .sp_pwdp = (char*) "!!",
+ .sp_lstchg = lstchg,
+ .sp_min = -1,
+ .sp_max = -1,
+ .sp_warn = -1,
+ .sp_inact = -1,
+ .sp_expire = -1,
+ .sp_flag = (unsigned long) -1, /* this appears to be what everybody does ... */
+ };
+
+ errno = 0;
+ if (putspent(&n, shadow) != 0) {
+ r = errno ? -errno : -EIO;
+ goto finish;
+ }
+ }
+
+ r = fflush_and_check(shadow);
+ if (r < 0)
+ goto finish;
+ }
+
+ /* Make a backup of the old files */
+ if (group_changed) {
+ if (group) {
+ r = make_backup("/etc/group", group_path);
+ if (r < 0)
+ goto finish;
+ }
+ if (gshadow) {
+ r = make_backup("/etc/gshadow", gshadow_path);
+ if (r < 0)
+ goto finish;
+ }
}
if (passwd) {
@@ -480,16 +672,32 @@ static int write_files(void) {
if (r < 0)
goto finish;
}
+ if (shadow) {
+ r = make_backup("/etc/shadow", shadow_path);
+ if (r < 0)
+ goto finish;
+ }
/* And make the new files count */
- if (group && group_changed) {
- if (rename(group_tmp, group_path) < 0) {
- r = -errno;
- goto finish;
+ if (group_changed) {
+ if (group) {
+ if (rename(group_tmp, group_path) < 0) {
+ r = -errno;
+ goto finish;
+ }
+
+ free(group_tmp);
+ group_tmp = NULL;
}
+ if (gshadow) {
+ if (rename(gshadow_tmp, gshadow_path) < 0) {
+ r = -errno;
+ goto finish;
+ }
- free(group_tmp);
- group_tmp = NULL;
+ free(gshadow_tmp);
+ gshadow_tmp = NULL;
+ }
}
if (passwd) {
@@ -501,14 +709,27 @@ static int write_files(void) {
free(passwd_tmp);
passwd_tmp = NULL;
}
+ if (shadow) {
+ if (rename(shadow_tmp, shadow_path) < 0) {
+ r = -errno;
+ goto finish;
+ }
+
+ free(shadow_tmp);
+ shadow_tmp = NULL;
+ }
r = 0;
finish:
if (passwd_tmp)
unlink(passwd_tmp);
+ if (shadow_tmp)
+ unlink(shadow_tmp);
if (group_tmp)
unlink(group_tmp);
+ if (gshadow_tmp)
+ unlink(gshadow_tmp);
return r;
}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-10 00:40:06 +0000