fileio: use take_fdopen_unlocked()

This fixes maybe-uninitialized warning: ``` ../src/basic/fileio.c: In function ‘chase_symlinks_and_fopen_unlocked’: ../src/basic/fileio.c:1026:19: warning: ‘f’ may be used uninitialized in this function [-Wmaybe-uninitialized] 1026 | *ret_file = f; | ~~~~~~~~~~^~~ ```
Merge pull request #19332 from yuwata/log_xxx_yyy_errno-follow-ups-19317
2025-10-08 05:04:45 +02:00 · 2021-04-17 00:22:12 +09:00 · 2021-04-16 23:44:32 +09:00 · 2021-04-16 19:48:54 +09:00 · 2021-04-16 09:17:28 +09:00 · 2021-04-16 08:46:51 +09:00
6 changed files with 64 additions and 44 deletions
--- a/src/basic/fileio.c
+++ b/src/basic/fileio.c
@ -1004,7 +1004,6 @@ int chase_symlinks_and_fopen_unlocked(
        _cleanup_close_ int fd = -1;
        _cleanup_free_ char *final_path = NULL;
        int mode_flags, r;
-        FILE *f;

        assert(path);
        assert(open_flags);
@ -1018,12 +1017,10 @@ int chase_symlinks_and_fopen_unlocked(
        if (fd < 0)
                return fd;

-        r = fdopen_unlocked(fd, open_flags, &f);
+        r = take_fdopen_unlocked(&fd, open_flags, ret_file);
        if (r < 0)
                return r;
-        TAKE_FD(fd);

-        *ret_file = f;
        if (ret_path)
                *ret_path = TAKE_PTR(final_path);
        return 0;
--- a/src/core/unit.h
+++ b/src/core/unit.h
@ -919,7 +919,7 @@ int unit_thaw_vtable_common(Unit *u);

 /* Macros which append UNIT= or USER_UNIT= to the message */

-#define log_unit_full_errno(unit, level, error, ...)                    \
+#define log_unit_full_errno_zerook(unit, level, error, ...)             \
        ({                                                              \
                const Unit *_u = (unit);                                \
                (log_get_max_level() < LOG_PRI(level)) ? -ERRNO_VALUE(error) : \
@ -927,9 +927,16 @@ int unit_thaw_vtable_common(Unit *u);
                                log_internal(level, error, PROJECT_FILE, __LINE__, __func__, ##__VA_ARGS__); \
        })

-#define log_unit_full(unit, level, ...) (void) log_unit_full_errno(unit, level, 0, __VA_ARGS__)
+#define log_unit_full_errno(unit, level, error, ...) \
+        ({                                                              \
+                int _error = (error);                                   \
+                ASSERT_NON_ZERO(_error);                                \
+                log_unit_full_errno_zerook(unit, level, _error, ##__VA_ARGS__); \
+        })

-#define log_unit_debug(unit, ...)   log_unit_full_errno(unit, LOG_DEBUG, 0, __VA_ARGS__)
+#define log_unit_full(unit, level, ...) (void) log_unit_full_errno_zerook(unit, level, 0, __VA_ARGS__)
+
+#define log_unit_debug(unit, ...)   log_unit_full(unit, LOG_DEBUG, __VA_ARGS__)
 #define log_unit_info(unit, ...)    log_unit_full(unit, LOG_INFO, __VA_ARGS__)
 #define log_unit_notice(unit, ...)  log_unit_full(unit, LOG_NOTICE, __VA_ARGS__)
 #define log_unit_warning(unit, ...) log_unit_full(unit, LOG_WARNING, __VA_ARGS__)
--- a/src/network/netdev/netdev.c
+++ b/src/network/netdev/netdev.c
@ -747,8 +747,7 @@ int netdev_load_one(Manager *manager, const char *filename) {
                r = netdev_get_mac(netdev->ifname, &netdev->mac);
                if (r < 0)
                        return log_netdev_error_errno(netdev, r,
-                                                      "Failed to generate predictable MAC address for %s: %m",
-                                                      netdev->ifname);
+                                                      "Failed to generate predictable MAC address: %m");
        }

        r = hashmap_ensure_put(&netdev->manager->netdevs, &string_hash_ops, netdev->ifname, netdev);
@ -760,8 +759,8 @@ int netdev_load_one(Manager *manager, const char *filename) {
                assert(n);
                if (!streq(netdev->filename, n->filename))
                        log_netdev_warning_errno(netdev, r,
-                                                 "The setting Name=%s in %s conflicts with the one in %s, ignoring",
-                                                 netdev->ifname, netdev->filename, n->filename);
+                                                 "Device was already configured by file %s, ignoring %s.",
+                                                 n->filename, netdev->filename);

                /* Clear ifname before netdev_free() is called. Otherwise, the NetDev object 'n' is
                 * removed from the hashmap 'manager->netdevs'. */
--- a/src/network/netdev/netdev.h
+++ b/src/network/netdev/netdev.h
@ -5,6 +5,7 @@

 #include "conf-parser.h"
 #include "list.h"
+#include "log-link.h"
 #include "networkd-link.h"
 #include "time-util.h"

@ -223,24 +224,32 @@ const struct ConfigPerfItem* network_netdev_gperf_lookup(const char *key, GPERF_

 /* Macros which append INTERFACE= to the message */

-#define log_netdev_full(netdev, level, error, ...)                      \
+#define log_netdev_full_errno_zerook(netdev, level, error, ...)         \
        ({                                                              \
                const NetDev *_n = (netdev);                            \
-                _n ? log_object_internal(level, error, PROJECT_FILE, __LINE__, __func__, "INTERFACE=", _n->ifname, NULL, NULL, ##__VA_ARGS__) : \
-                        log_internal(level, error, PROJECT_FILE, __LINE__, __func__, ##__VA_ARGS__); \
+                log_interface_full_errno_zerook(_n ? _n->ifname : NULL, level, error, __VA_ARGS__); \
        })

-#define log_netdev_debug(netdev, ...)       log_netdev_full(netdev, LOG_DEBUG, 0, ##__VA_ARGS__)
-#define log_netdev_info(netdev, ...)        log_netdev_full(netdev, LOG_INFO, 0, ##__VA_ARGS__)
-#define log_netdev_notice(netdev, ...)      log_netdev_full(netdev, LOG_NOTICE, 0, ##__VA_ARGS__)
-#define log_netdev_warning(netdev, ...)     log_netdev_full(netdev, LOG_WARNING, 0, ## __VA_ARGS__)
-#define log_netdev_error(netdev, ...)       log_netdev_full(netdev, LOG_ERR, 0, ##__VA_ARGS__)
+#define log_netdev_full_errno(netdev, level, error, ...) \
+        ({                                                              \
+                int _error = (error);                                   \
+                ASSERT_NON_ZERO(_error);                                \
+                log_netdev_full_errno_zerook(netdev, level, _error, __VA_ARGS__); \
+        })

-#define log_netdev_debug_errno(netdev, error, ...)   log_netdev_full(netdev, LOG_DEBUG, error, ##__VA_ARGS__)
-#define log_netdev_info_errno(netdev, error, ...)    log_netdev_full(netdev, LOG_INFO, error, ##__VA_ARGS__)
-#define log_netdev_notice_errno(netdev, error, ...)  log_netdev_full(netdev, LOG_NOTICE, error, ##__VA_ARGS__)
-#define log_netdev_warning_errno(netdev, error, ...) log_netdev_full(netdev, LOG_WARNING, error, ##__VA_ARGS__)
-#define log_netdev_error_errno(netdev, error, ...)   log_netdev_full(netdev, LOG_ERR, error, ##__VA_ARGS__)
+#define log_netdev_full(netdev, level, ...) (void) log_netdev_full_errno_zerook(netdev, level, 0, __VA_ARGS__)
+
+#define log_netdev_debug(netdev, ...)   log_netdev_full(netdev, LOG_DEBUG, __VA_ARGS__)
+#define log_netdev_info(netdev, ...)    log_netdev_full(netdev, LOG_INFO, __VA_ARGS__)
+#define log_netdev_notice(netdev, ...)  log_netdev_full(netdev, LOG_NOTICE, __VA_ARGS__)
+#define log_netdev_warning(netdev, ...) log_netdev_full(netdev, LOG_WARNING,  __VA_ARGS__)
+#define log_netdev_error(netdev, ...)   log_netdev_full(netdev, LOG_ERR, __VA_ARGS__)
+
+#define log_netdev_debug_errno(netdev, error, ...)   log_netdev_full_errno(netdev, LOG_DEBUG, error, __VA_ARGS__)
+#define log_netdev_info_errno(netdev, error, ...)    log_netdev_full_errno(netdev, LOG_INFO, error, __VA_ARGS__)
+#define log_netdev_notice_errno(netdev, error, ...)  log_netdev_full_errno(netdev, LOG_NOTICE, error, __VA_ARGS__)
+#define log_netdev_warning_errno(netdev, error, ...) log_netdev_full_errno(netdev, LOG_WARNING, error, __VA_ARGS__)
+#define log_netdev_error_errno(netdev, error, ...)   log_netdev_full_errno(netdev, LOG_ERR, error, __VA_ARGS__)

 #define LOG_NETDEV_MESSAGE(netdev, fmt, ...) "MESSAGE=%s: " fmt, (netdev)->ifname, ##__VA_ARGS__
 #define LOG_NETDEV_INTERFACE(netdev) "INTERFACE=%s", (netdev)->ifname
--- a/src/network/netdev/wireguard.c
+++ b/src/network/netdev/wireguard.c
@ -914,14 +914,13 @@ static int wireguard_verify(NetDev *netdev, const char *filename) {
        r = wireguard_read_key_file(w->private_key_file, w->private_key);
        if (r < 0)
                return log_netdev_error_errno(netdev, r,
-                                              "Failed to read private key from %s. Dropping network device %s.",
-                                              w->private_key_file, netdev->ifname);
+                                              "Failed to read private key from %s. Ignoring network device.",
+                                              w->private_key_file);

        if (eqzero(w->private_key))
                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
                                              "%s: Missing PrivateKey= or PrivateKeyFile=, "
-                                              "Dropping network device %s.",
-                                              filename, netdev->ifname);
+                                              "Ignoring network device.", filename);

        LIST_FOREACH_SAFE(peers, peer, peer_next, w->peers)
                if (wireguard_peer_verify(peer) < 0)
--- a/src/timedate/timedated.c
+++ b/src/timedate/timedated.c
@ -65,24 +65,33 @@ typedef struct Context {
        LIST_HEAD(UnitStatusInfo, units);
 } Context;

-#define log_unit_full(unit, level, error, ...)                          \
+#define log_unit_full_errno_zerook(unit, level, error, ...)             \
        ({                                                              \
                const UnitStatusInfo *_u = (unit);                      \
-                log_object_internal(level, error, PROJECT_FILE, __LINE__, __func__, \
-                                    "UNIT=", _u->name, NULL, NULL, ##__VA_ARGS__); \
+                _u ? log_object_internal(level, error, PROJECT_FILE, __LINE__, __func__, "UNIT=", _u->name, NULL, NULL, ##__VA_ARGS__) : \
+                        log_internal(level, error, PROJECT_FILE, __LINE__, __func__, ##__VA_ARGS__); \
        })

-#define log_unit_debug(unit, ...)   log_unit_full(unit, LOG_DEBUG, 0, ##__VA_ARGS__)
-#define log_unit_info(unit, ...)    log_unit_full(unit, LOG_INFO, 0, ##__VA_ARGS__)
-#define log_unit_notice(unit, ...)  log_unit_full(unit, LOG_NOTICE, 0, ##__VA_ARGS__)
-#define log_unit_warning(unit, ...) log_unit_full(unit, LOG_WARNING, 0, ##__VA_ARGS__)
-#define log_unit_error(unit, ...)   log_unit_full(unit, LOG_ERR, 0, ##__VA_ARGS__)
+#define log_unit_full_errno(unit, level, error, ...) \
+        ({                                                              \
+                int _error = (error);                                   \
+                ASSERT_NON_ZERO(_error);                                \
+                log_unit_full_errno_zerook(unit, level, _error, ##__VA_ARGS__); \
+        })

-#define log_unit_debug_errno(unit, error, ...)   log_unit_full(unit, LOG_DEBUG, error, ##__VA_ARGS__)
-#define log_unit_info_errno(unit, error, ...)    log_unit_full(unit, LOG_INFO, error, ##__VA_ARGS__)
-#define log_unit_notice_errno(unit, error, ...)  log_unit_full(unit, LOG_NOTICE, error, ##__VA_ARGS__)
-#define log_unit_warning_errno(unit, error, ...) log_unit_full(unit, LOG_WARNING, error, ##__VA_ARGS__)
-#define log_unit_error_errno(unit, error, ...)   log_unit_full(unit, LOG_ERR, error, ##__VA_ARGS__)
+#define log_unit_full(unit, level, ...) (void) log_unit_full_errno_zerook(unit, level, 0, ##__VA_ARGS__)
+
+#define log_unit_debug(unit, ...)   log_unit_full(unit, LOG_DEBUG, ##__VA_ARGS__)
+#define log_unit_info(unit, ...)    log_unit_full(unit, LOG_INFO, ##__VA_ARGS__)
+#define log_unit_notice(unit, ...)  log_unit_full(unit, LOG_NOTICE, ##__VA_ARGS__)
+#define log_unit_warning(unit, ...) log_unit_full(unit, LOG_WARNING, ##__VA_ARGS__)
+#define log_unit_error(unit, ...)   log_unit_full(unit, LOG_ERR, ##__VA_ARGS__)
+
+#define log_unit_debug_errno(unit, error, ...)   log_unit_full_errno(unit, LOG_DEBUG, error, ##__VA_ARGS__)
+#define log_unit_info_errno(unit, error, ...)    log_unit_full_errno(unit, LOG_INFO, error, ##__VA_ARGS__)
+#define log_unit_notice_errno(unit, error, ...)  log_unit_full_errno(unit, LOG_NOTICE, error, ##__VA_ARGS__)
+#define log_unit_warning_errno(unit, error, ...) log_unit_full_errno(unit, LOG_WARNING, error, ##__VA_ARGS__)
+#define log_unit_error_errno(unit, error, ...)   log_unit_full_errno(unit, LOG_ERR, error, ##__VA_ARGS__)

 static void unit_status_info_clear(UnitStatusInfo *p) {
        assert(p);
@ -485,7 +494,7 @@ static int unit_start_or_stop(UnitStatusInfo *u, sd_bus *bus, sd_bus_error *erro
                "ss",
                u->name,
                "replace");
-        log_unit_full(u, r < 0 ? LOG_WARNING : LOG_DEBUG, r,
+        log_unit_full_errno_zerook(u, r < 0 ? LOG_WARNING : LOG_DEBUG, r,
                                   "%s unit: %m", start ? "Starting" : "Stopping");
        if (r < 0)
                return r;
Author	SHA1	Message	Date
Yu Watanabe	6604fb0207	fileio: use take_fdopen_unlocked() This fixes maybe-uninitialized warning: ``` ../src/basic/fileio.c: In function ‘chase_symlinks_and_fopen_unlocked’: ../src/basic/fileio.c:1026:19: warning: ‘f’ may be used uninitialized in this function [-Wmaybe-uninitialized] 1026 \| *ret_file = f; \| ~~~~~~~~~~^~~ ```	2021-04-17 00:22:12 +09:00
Yu Watanabe	b4bc798f87	Merge pull request #19332 from yuwata/log_xxx_yyy_errno-follow-ups-19317 core,timedate,network: make log_unit_error_errno() or friends refuse zero errno	2021-04-16 23:44:32 +09:00
Yu Watanabe	74bd6ad016	network: update log message In some optimization level with gcc, including netdev->ifname in log message causes error.	2021-04-16 19:48:54 +09:00
Yu Watanabe	6064344894	network: make log_netdev_xxx_errno() refuse zero errno	2021-04-16 09:17:28 +09:00
Yu Watanabe	5b098203fd	timedate: make log_unit_xxx_errno() refuse zero errno	2021-04-16 08:46:51 +09:00
Yu Watanabe	ac51363496	core: make log_unit_xxx_errno() refuse zero errno	2021-04-16 08:46:11 +09:00