Be more careful when checking for empty files

[elogind.git] / src / udev / net / link-config.c

diff --git a/src/udev/net/link-config.c b/src/udev/net/link-config.c
index 345a380d8526ccab5d29c050bcce20040d26c4ae..512885f9c8604ced0757f4dd476133e7b3ab9dc8 100644 (file)
--- a/src/udev/net/link-config.c
+++ b/src/udev/net/link-config.c
@@ -92,14 +92,20 @@ static int link_config_ctx_connect(link_config_ctx *ctx) {
 
         if (ctx->ethtool_fd == -1) {
                 r = ethtool_connect(&ctx->ethtool_fd);
-                if (r < 0)
+                if (r < 0) {
+                        log_warning("link_config: could not connect to ethtool: %s",
+                                    strerror(-r));
                         return r;
+                }
         }
 
         if (!ctx->rtnl) {
                 r = sd_rtnl_open(&ctx->rtnl, 0);
-                if (r < 0)
+                if (r < 0) {
+                        log_warning("link_config: could not connect to rtnl: %s",
+                                    strerror(-r));
                         return r;
+                }
         }
 
         return 0;
@@ -118,6 +124,7 @@ static void link_configs_free(link_config_ctx *ctx) {
                 free(link->match_type);
                 free(link->description);
                 free(link->alias);
+                free(link->name_policy);
 
                 free(link);
         }
@@ -140,17 +147,12 @@ void link_config_ctx_free(link_config_ctx *ctx) {
 
 static int load_link(link_config_ctx *ctx, const char *filename) {
         _cleanup_free_ link_config *link = NULL;
-        _cleanup_fclose_ FILE *file;
+        _cleanup_fclose_ FILE *file = NULL;
         int r;
 
         assert(ctx);
         assert(filename);
 
-        if (null_or_empty_path(filename)) {
-                log_debug("skipping empty file: %s", filename);
-                return 0;
-        }
-
         file = fopen(filename, "re");
         if (!file) {
                 if (errno == ENOENT)
@@ -159,6 +161,11 @@ static int load_link(link_config_ctx *ctx, const char *filename) {
                         return -errno;
         }
 
+        if (null_or_empty_fd(fileno(file))) {
+                log_debug("Skipping empty file: %s", filename);
+                return 0;
+        }
+
         link = new0(link_config, 1);
         if (!link)
                 return log_oom();
@@ -167,12 +174,13 @@ static int load_link(link_config_ctx *ctx, const char *filename) {
         link->wol = _WOL_INVALID;
         link->duplex = _DUP_INVALID;
 
-        r = config_parse(NULL, filename, file, "Match\0Link\0Ethernet\0", config_item_perf_lookup,
-                         (void*) link_config_gperf_lookup, false, false, link);
-        if (r < 0) {
-                log_warning("Could not parse config file %s: %s", filename, strerror(-r));
+        r = config_parse(NULL, filename, file,
+                         "Match\0Link\0Ethernet\0",
+                         config_item_perf_lookup, link_config_gperf_lookup,
+                         false, false, true, link);
+        if (r < 0)
                 return r;
-        } else
+        else
                 log_debug("Parsed configuration file %s", filename);
 
         link->filename = strdup(filename);
@@ -184,7 +192,7 @@ static int load_link(link_config_ctx *ctx, const char *filename) {
 }
 
 static bool enable_name_policy(void) {
-        _cleanup_free_ char *line;
+        _cleanup_free_ char *line = NULL;
         char *w, *state;
         int r;
         size_t l;
@@ -204,7 +212,8 @@ static bool enable_name_policy(void) {
 
 int link_config_load(link_config_ctx *ctx) {
         int r;
-        char **files, **f;
+        _cleanup_strv_free_ char **files;
+        char **f;
 
         link_configs_free(ctx);
 
@@ -278,22 +287,6 @@ static bool mac_is_random(struct udev_device *device) {
         return type == 1;
 }
 
-static bool mac_is_permanent(struct udev_device *device) {
-        const char *s;
-        unsigned type;
-        int r;
-
-        s = udev_device_get_sysattr_value(device, "addr_assign_type");
-        if (!s)
-                return true; /* if we don't know, assume it is permanent */
-        r = safe_atou(s, &type);
-        if (r < 0)
-                return true;
-
-        /* check for NET_ADDR_PERM */
-        return type == 0;
-}
-
 static int get_mac(struct udev_device *device, bool want_random, struct ether_addr *mac) {
         int r;
 
@@ -389,9 +382,11 @@ int link_config_apply(link_config_ctx *ctx, link_config *config, struct udev_dev
 
         switch (config->mac_policy) {
                 case MACPOLICY_PERSISTENT:
-                        if (!mac_is_permanent(device)) {
+                        if (mac_is_random(device)) {
                                 r = get_mac(device, false, &generated_mac);
-                                if (r < 0)
+                                if (r == -ENOENT)
+                                        break;
+                                else if (r < 0)
                                         return r;
                                 mac = &generated_mac;
                         }
@@ -399,7 +394,9 @@ int link_config_apply(link_config_ctx *ctx, link_config *config, struct udev_dev
                 case MACPOLICY_RANDOM:
                         if (!mac_is_random(device)) {
                                 r = get_mac(device, true, &generated_mac);
-                                if (r < 0)
+                                if (r == -ENOENT)
+                                        break;
+                                else if (r < 0)
                                         return r;
                                 mac = &generated_mac;
                         }