add function get_statfs_by_path

HISTORY

@@ -1,4 +1,8 @@
 
+Version 1.76  2024-10-31
+  * get_mounted_filesystems act as program df
+  * add function get_statfs_by_path
+
 Version 1.75  2024-09-22
   * task init callback support extra argument
   * connection pool performance optimization

src/system_info.c

@@ -334,6 +334,52 @@ int get_mounted_filesystems(struct fast_statfs *stats,
 #endif
 }
 
+int get_statfs_by_path(const char *path, FastStatFS *statfs)
+{
+#define MAX_STATFS_COUNT  256
+    int result;
+    int count;
+    int path_len;
+    int mnt_len;
+    int matched_len;
+    char resolved_path[PATH_MAX];
+    struct fast_statfs stats[MAX_STATFS_COUNT];
+    struct fast_statfs *entry;
+    struct fast_statfs *end;
+
+    if ((result=get_mounted_filesystems(stats, MAX_STATFS_COUNT,
+                    &count)) != 0)
+    {
+        return result;
+    }
+
+    realpath(path, resolved_path);
+    path_len = strlen(resolved_path);
+    matched_len = 0;
+    end = stats + count;
+    for (entry=stats; entry<end; entry++)
+    {
+        mnt_len = strlen(entry->f_mntonname);
+        if (mnt_len <= path_len && memcmp(resolved_path, entry->
+                    f_mntonname, mnt_len) == 0)
+        {
+            if ((mnt_len > 1 && mnt_len < path_len) &&
+                    *(resolved_path + mnt_len) != '/')
+            {
+                continue;
+            }
+
+            if (mnt_len > matched_len)
+            {
+                matched_len = mnt_len;
+                *statfs = *entry;
+            }
+        }
+    }
+
+    return (matched_len > 0 ? 0 : ENOENT);
+}
+
 #if defined(OS_LINUX) || defined(OS_FREEBSD)
 
 typedef struct fast_process_array {

src/system_info.h

@@ -151,6 +151,15 @@ int get_boot_time(struct timeval *boot_time);
 int get_mounted_filesystems(struct fast_statfs *stats,
         const int size, int *count);
 
+/** get statfs by path
+ *  parameters:
+ *      path: the path
+ *      statfs: return the statfs
+ *  return: error no, 0 success, != 0 fail
+*/
+int get_statfs_by_path(const char *path, FastStatFS *statfs);
+
+
 #if defined(OS_LINUX) || defined(OS_FREEBSD)
 /** get processes
  *  parameters:

src/tests/test_mblock.c

@@ -64,6 +64,8 @@ int main(int argc, char *argv[])
     volatile bool continue_flag = true;
     FastIFConfig if_configs[32];
     struct fast_statfs stats[32];
+    char *path;
+    FastStatFS statfs;
 
     start_time = get_current_time_ms();
     srand(time(NULL));
@@ -92,6 +94,13 @@ int main(int argc, char *argv[])
                 stats[i].f_ffree);
     }
 
+    path = "/root";
+    if (get_statfs_by_path(path, &statfs) == 0) {
+        printf("\ninput path: %s, %s => %s, type: %s\n\n", path,
+                statfs.f_mntfromname, statfs.f_mntonname,
+                statfs.f_fstypename);
+    }
+
 #if defined(OS_LINUX) || defined(OS_FREEBSD)
     {
         FastProcessInfo *processes;
@@ -139,31 +148,6 @@ int main(int argc, char *argv[])
 
 #endif
 
-    /*
-    {
-    int result;
-    char *filename;
-    IniContext iniContext;
-    if (argc > 1) {
-        filename  = argv[1];
-    } else {
-        filename = "/etc/mc/worker.conf";
-    }
-
-
-    if ((result=iniLoadFromFile(filename, &iniContext)) != 0) {
-        logError("file: "__FILE__", line: %d, "
-                "load conf file \"%s\" fail, ret code: %d",
-                __LINE__, filename, result);
-        return result;
-    }
-
-
-    //iniPrintItems(&iniContext);
-    iniFreeContext(&iniContext);
-    }
-    */
-
     sched_enable_delay_task();
     scheduleArray.entries = scheduleEntries;
     scheduleArray.count = 0;