Prep v225: Applying various fixes and changes to src/login that got lost during git...

[elogind.git] / src / login / logind-user.c

diff --git a/src/login/logind-user.c b/src/login/logind-user.c
index 3847496c15cb5d574e56cb5cfe4a328ee4fed9c5..987244e27ec1f2cfd5e55e699ca0376dce8ae0a9 100644 (file)
--- a/src/login/logind-user.c
+++ b/src/login/logind-user.c
@@ -26,8 +26,8 @@
 
 #include "util.h"
 #include "mkdir.h"
+#include "rm-rf.h"
 #include "hashmap.h"
-#include "strv.h"
 #include "fileio.h"
 #include "path-util.h"
 #include "special.h"
@@ -38,6 +38,7 @@
 #include "clean-ipc.h"
 #include "logind-user.h"
 #include "smack-util.h"
+#include "formats-util.h"
 
 User* user_new(Manager *m, uid_t uid, gid_t gid, const char *name) {
         User *u;
@@ -56,7 +57,7 @@ User* user_new(Manager *m, uid_t uid, gid_t gid, const char *name) {
         if (asprintf(&u->state_file, "/run/systemd/users/"UID_FMT, uid) < 0)
                 goto fail;
 
-        if (hashmap_put(m->users, ULONG_TO_PTR((unsigned long) uid), u) < 0)
+        if (hashmap_put(m->users, UID_TO_PTR(uid), u) < 0)
                 goto fail;
 
         u->manager = m;
@@ -97,7 +98,7 @@ void user_free(User *u) {
 
         free(u->runtime_path);
 
-        hashmap_remove(u->manager->users, ULONG_TO_PTR((unsigned long) u->uid));
+        hashmap_remove(u->manager->users, UID_TO_PTR(u->uid));
 
         free(u->name);
         free(u->state_file);
@@ -117,11 +118,11 @@ int user_save(User *u) {
 
         r = mkdir_safe_label("/run/systemd/users", 0755, 0, 0);
         if (r < 0)
-                goto finish;
+                goto fail;
 
         r = fopen_temporary(u->state_file, &f, &temp_path);
         if (r < 0)
-                goto finish;
+                goto fail;
 
         fchmod(fileno(f), 0644);
 
@@ -242,19 +243,24 @@ int user_save(User *u) {
                 fputc('\n', f);
         }
 
-        fflush(f);
+        r = fflush_and_check(f);
+        if (r < 0)
+                goto fail;
 
-        if (ferror(f) || rename(temp_path, u->state_file) < 0) {
+        if (rename(temp_path, u->state_file) < 0) {
                 r = -errno;
-                unlink(u->state_file);
-                unlink(temp_path);
+                goto fail;
         }
 
-finish:
-        if (r < 0)
-                log_error("Failed to save user data %s: %s", u->state_file, strerror(-r));
+        return 0;
 
-        return r;
+fail:
+        (void) unlink(u->state_file);
+
+        if (temp_path)
+                (void) unlink(temp_path);
+
+        return log_error_errno(r, "Failed to save user data %s: %m", u->state_file);
 }
 
 int user_load(User *u) {
@@ -278,7 +284,7 @@ int user_load(User *u) {
                 if (r == -ENOENT)
                         return 0;
 
-                log_error("Failed to read %s: %s", u->state_file, strerror(-r));
+                log_error_errno(r, "Failed to read %s: %m", u->state_file);
                 return r;
         }
 
@@ -310,10 +316,8 @@ static int user_mkdir_runtime_path(User *u) {
         assert(u);
 
         r = mkdir_safe_label("/run/user", 0755, 0, 0);
-        if (r < 0) {
-                log_error("Failed to create /run/user: %s", strerror(-r));
-                return r;
-        }
+        if (r < 0)
+                return log_error_errno(r, "Failed to create /run/user: %m");
 
         if (!u->runtime_path) {
                 if (asprintf(&p, "/run/user/" UID_FMT, u->uid) < 0)
@@ -324,13 +328,12 @@ static int user_mkdir_runtime_path(User *u) {
         if (path_is_mount_point(p, false) <= 0) {
                 _cleanup_free_ char *t = NULL;
 
-                mkdir(p, 0700);
+                (void) mkdir(p, 0700);
 
-                if (use_smack())
+                if (mac_smack_use())
                         r = asprintf(&t, "mode=0700,smackfsroot=*,uid=" UID_FMT ",gid=" GID_FMT ",size=%zu", u->uid, u->gid, u->manager->runtime_dir_size);
                 else
                         r = asprintf(&t, "mode=0700,uid=" UID_FMT ",gid=" GID_FMT ",size=%zu", u->uid, u->gid, u->manager->runtime_dir_size);
-
                 if (r < 0) {
                         r = log_oom();
                         goto fail;
@@ -338,8 +341,20 @@ static int user_mkdir_runtime_path(User *u) {
 
                 r = mount("tmpfs", p, "tmpfs", MS_NODEV|MS_NOSUID, t);
                 if (r < 0) {
-                        log_error("Failed to mount per-user tmpfs directory %s: %s", p, strerror(-r));
-                        goto fail;
+                        if (errno != EPERM) {
+                                r = log_error_errno(errno, "Failed to mount per-user tmpfs directory %s: %m", p);
+                                goto fail;
+                        }
+
+                        /* Lacking permissions, maybe
+                         * CAP_SYS_ADMIN-less container? In this case,
+                         * just use a normal directory. */
+
+                        r = chmod_and_chown(p, 0700, u->uid, u->gid);
+                        if (r < 0) {
+                                log_error_errno(r, "Failed to change runtime directory ownership and mode: %m");
+                                goto fail;
+                        }
                 }
         }
 
@@ -347,7 +362,12 @@ static int user_mkdir_runtime_path(User *u) {
         return 0;
 
 fail:
-        free(p);
+        if (p) {
+                /* Try to clean up, but ignore errors */
+                (void) rmdir(p);
+                free(p);
+        }
+
         u->runtime_path = NULL;
         return r;
 }
@@ -363,7 +383,7 @@ static int user_start_slice(User *u) {
                 char lu[DECIMAL_STR_MAX(uid_t) + 1], *slice;
                 sprintf(lu, UID_FMT, u->uid);
 
-                r = build_subslice(SPECIAL_USER_SLICE, lu, &slice);
+                r = slice_build_subslice(SPECIAL_USER_SLICE, lu, &slice);
                 if (r < 0)
                         return r;
 
@@ -396,9 +416,9 @@ static int user_start_service(User *u) {
                 char lu[DECIMAL_STR_MAX(uid_t) + 1], *service;
                 sprintf(lu, UID_FMT, u->uid);
 
-                service = unit_name_build("user", lu, ".service");
-                if (!service)
-                        return log_oom();
+                r = unit_name_build("user", lu, ".service", &service);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to build service name: %m");
 
                 r = manager_start_unit(u->manager, service, &error, &job);
                 if (r < 0) {
@@ -508,16 +528,20 @@ static int user_remove_runtime_path(User *u) {
         if (!u->runtime_path)
                 return 0;
 
-        r = rm_rf(u->runtime_path, false, false, false);
+        r = rm_rf(u->runtime_path, 0);
         if (r < 0)
-                log_error("Failed to remove runtime directory %s: %s", u->runtime_path, strerror(-r));
+                log_error_errno(r, "Failed to remove runtime directory %s: %m", u->runtime_path);
 
-        if (umount2(u->runtime_path, MNT_DETACH) < 0)
-                log_error("Failed to unmount user runtime directory %s: %m", u->runtime_path);
+        /* Ignore cases where the directory isn't mounted, as that's
+         * quite possible, if we lacked the permissions to mount
+         * something */
+        r = umount2(u->runtime_path, MNT_DETACH);
+        if (r < 0 && errno != EINVAL && errno != ENOENT)
+                log_error_errno(errno, "Failed to unmount user runtime directory %s: %m", u->runtime_path);
 
-        r = rm_rf(u->runtime_path, false, true, false);
+        r = rm_rf(u->runtime_path, REMOVE_ROOT);
         if (r < 0)
-                log_error("Failed to remove runtime directory %s: %s", u->runtime_path, strerror(-r));
+                log_error_errno(r, "Failed to remove runtime directory %s: %m", u->runtime_path);
 
         free(u->runtime_path);
         u->runtime_path = NULL;
@@ -641,7 +665,7 @@ int user_check_linger_file(User *u) {
         if (!cc)
                 return -ENOMEM;
 
-        p = strappenda("/var/lib/systemd/linger/", cc);
+        p = strjoina("/var/lib/systemd/linger/", cc);
 
         return access(p, F_OK) >= 0;
 }