From 2c740afd1613a7ab5e70e39251767a3429c543cc Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Sat, 1 Sep 2018 23:12:47 +0900
Subject: [PATCH] tree-wide: do not assign unused return values

---
 src/cryptsetup/cryptsetup.c | 16 +++++-----------
 src/fsck/fsck.c             |  3 +--
 src/network/networkctl.c    | 19 +++++++------------
 3 files changed, 13 insertions(+), 25 deletions(-)

diff --git a/src/cryptsetup/cryptsetup.c b/src/cryptsetup/cryptsetup.c
index a622db8..b590d70 100644
--- a/src/cryptsetup/cryptsetup.c
+++ b/src/cryptsetup/cryptsetup.c
@@ -271,7 +271,6 @@ static int parse_options(const char *options) {
 }
 
 static char* disk_description(const char *path) {
-
         static const char name_fields[] =
                 "ID_PART_ENTRY_NAME\0"
                 "DM_NAME\0"
@@ -279,9 +278,8 @@ static char* disk_description(const char *path) {
                 "ID_MODEL\0";
 
         _cleanup_(sd_device_unrefp) sd_device *device = NULL;
+        const char *i, *name;
         struct stat st;
-        const char *i;
-        int r;
 
         assert(path);
 
@@ -291,17 +289,13 @@ static char* disk_description(const char *path) {
         if (!S_ISBLK(st.st_mode))
                 return NULL;
 
-        r = sd_device_new_from_devnum(&device, 'b', st.st_rdev);
-        if (r < 0)
+        if (sd_device_new_from_devnum(&device, 'b', st.st_rdev) < 0)
                 return NULL;
 
-        NULSTR_FOREACH(i, name_fields) {
-                const char *name;
-
-                r = sd_device_get_property_value(device, i, &name);
-                if (r >= 0 && !isempty(name))
+        NULSTR_FOREACH(i, name_fields)
+                if (sd_device_get_property_value(device, i, &name) >= 0 &&
+                    !isempty(name))
                         return strdup(name);
-        }
 
         return NULL;
 }
diff --git a/src/fsck/fsck.c b/src/fsck/fsck.c
index 50f838a..132714f 100644
--- a/src/fsck/fsck.c
+++ b/src/fsck/fsck.c
@@ -357,8 +357,7 @@ int main(int argc, char *argv[]) {
                 root_directory = true;
         }
 
-        r = sd_device_get_property_value(dev, "ID_FS_TYPE", &type);
-        if (r >= 0) {
+        if (sd_device_get_property_value(dev, "ID_FS_TYPE", &type) >= 0) {
                 r = fsck_exists(type);
                 if (r < 0)
                         log_warning_errno(r, "Couldn't detect if fsck.%s may be used for %s, proceeding: %m", type, device);
diff --git a/src/network/networkctl.c b/src/network/networkctl.c
index aaf1a14..c4a8fc8 100644
--- a/src/network/networkctl.c
+++ b/src/network/networkctl.c
@@ -39,16 +39,13 @@ static bool arg_legend = true;
 static bool arg_all = false;
 
 static char *link_get_type_string(unsigned short iftype, sd_device *d) {
-        const char *t;
+        const char *t, *devtype;
         char *p;
 
-        if (d) {
-                const char *devtype = NULL;
-
-                (void) sd_device_get_devtype(d, &devtype);
-                if (!isempty(devtype))
-                        return strdup(devtype);
-        }
+        if (d &&
+            sd_device_get_devtype(d, &devtype) >= 0 &&
+            !isempty(devtype))
+                return strdup(devtype);
 
         t = arphrd_to_name(iftype);
         if (!t)
@@ -768,12 +765,10 @@ static int link_status_one(
                 (void) sd_device_get_property_value(d, "ID_NET_DRIVER", &driver);
                 (void) sd_device_get_property_value(d, "ID_PATH", &path);
 
-                r = sd_device_get_property_value(d, "ID_VENDOR_FROM_DATABASE", &vendor);
-                if (r < 0)
+                if (sd_device_get_property_value(d, "ID_VENDOR_FROM_DATABASE", &vendor) < 0)
                         (void) sd_device_get_property_value(d, "ID_VENDOR", &vendor);
 
-                r = sd_device_get_property_value(d, "ID_MODEL_FROM_DATABASE", &model);
-                if (r < 0)
+                if (sd_device_get_property_value(d, "ID_MODEL_FROM_DATABASE", &model) < 0)
                         (void) sd_device_get_property_value(d, "ID_MODEL", &model);
         }
 
-- 
2.7.4