Chore: fix code smell

Author: CarterLi

src/detection/disk/disk_bsd.c

@@ -36,7 +36,7 @@ static const char* detectFsLabel(struct statfs* fs, FFDisk* disk)
             return "geom_gettree() failed";
         }
 
-        for (cLabels = geomTree.lg_class.lh_first; !ffStrEquals(cLabels->lg_name, "LABEL"); cLabels = cLabels->lg_class.le_next);
+        for (cLabels = geomTree.lg_class.lh_first; cLabels && !ffStrEquals(cLabels->lg_name, "LABEL"); cLabels = cLabels->lg_class.le_next);
         if (!cLabels)
             return "Class LABEL is not found";
     }
@@ -165,7 +165,7 @@ const char* ffDetectDisksImpl(FFDiskOptions* options, FFlist* disks)
         disk->bytesUsed = 0; // To be filled in ./disk.c
 
         disk->filesTotal = (uint32_t) fs->f_files;
-        disk->filesUsed = (uint32_t) (disk->filesTotal - (uint64_t)fs->f_ffree);
+        disk->filesUsed = (uint32_t) (fs->f_files - fs->f_ffree);
 
         ffStrbufInitS(&disk->mountFrom, fs->f_mntfromname);
         ffStrbufInitS(&disk->mountpoint, fs->f_mntonname);
@@ -185,7 +185,7 @@ const char* ffDetectDisksImpl(FFDiskOptions* options, FFlist* disks)
         #ifndef __DragonFly__
         struct stat st;
         if(stat(fs->f_mntonname, &st) == 0 && st.st_birthtimespec.tv_sec > 0)
-            disk->createTime = (uint64_t)((st.st_birthtimespec.tv_sec * 1000) + (st.st_birthtimespec.tv_nsec / 1000000));
+            disk->createTime = (uint64_t)(((uint64_t) st.st_birthtimespec.tv_sec * 1000) + (st.st_birthtimespec.tv_nsec / 1000000));
         #endif
     }
 

src/detection/disk/disk_haiku.cpp

@@ -14,7 +14,7 @@ const char* ffDetectDisksImpl(FFDiskOptions* options, FFlist* disks)
     for (dev_t dev; (dev = next_dev(&pos)) >= B_OK;)
     {
         fs_info fs;
-        if (fs_stat_dev(dev, &fs) < -1) continue;
+        if (fs_stat_dev(dev, &fs) < 0) continue;
 
         node_ref node(fs.dev, fs.root);
         BDirectory dir(&node);
@@ -32,10 +32,10 @@ const char* ffDetectDisksImpl(FFDiskOptions* options, FFlist* disks)
         disk->bytesTotal = (uint64_t)fs.total_blocks * (uint64_t) fs.block_size;
         disk->bytesFree = (uint64_t)fs.free_blocks * (uint64_t) fs.block_size;
         disk->bytesAvailable = disk->bytesFree;
-        disk->bytesUsed = 0; // To be filled in ./disk. c
+        disk->bytesUsed = 0; // To be filled in ./disk.c
 
         disk->filesTotal = (uint32_t) fs.total_nodes;
-        disk->filesUsed = (uint32_t) (disk->filesTotal - (uint64_t)fs.free_nodes);
+        disk->filesUsed = (uint32_t) (fs.total_nodes - fs.free_nodes);
 
         ffStrbufInitS(&disk->mountFrom, fs.device_name);
         ffStrbufInitS(&disk->mountpoint, path.Path());

src/detection/disk/disk_linux.c

@@ -209,7 +209,10 @@ static bool isRemovable(FFDisk* currentDisk)
     char sysBlockVolume[PATH_MAX]; // /sys/devices/pci0000:00/0000:00:14.0/usb4/4-3/4-3:1.0/host0/target0:0:0/0:0:0:0/block/sda/sda1
     if (realpath(sysBlockPartition, sysBlockVolume) == NULL)
         return false;
-    strcpy(strrchr(sysBlockVolume, '/') + 1, "removable");
+    char* lastSlash = strrchr(sysBlockVolume, '/');
+    if (lastSlash == NULL)
+        return false;
+    strcpy(lastSlash + 1, "removable");
 
     char removableChar = '0';
     return ffReadFileData(sysBlockVolume, 1, &removableChar) > 0 && removableChar == '1';

src/detection/diskio/diskio_bsd.c

@@ -13,14 +13,18 @@
 
 const char* ffDiskIOGetIoCounters(FFlist* result, FFDiskIOOptions* options)
 {
-    struct gmesh geomTree;
+    __attribute__((__cleanup__(geom_deletetree)))
+    struct gmesh geomTree = {};
     if (geom_gettree(&geomTree) < 0)
         return "geom_gettree() failed";
 
     if (geom_stats_open() < 0)
         return "geom_stats_open() failed";
 
     void* snap = geom_stats_snapshot_get();
+    if (!snap)
+        return "geom_stats_snapshot_get() failed";
+
     struct devstat* snapIter;
     while ((snapIter = geom_stats_snapshot_next(snap)) != NULL)
     {