- Split out filesystem functions in filesystem.h/.cpp

- Update Jamfile

efiler/Jamfile

@@ -10,7 +10,7 @@
 
 SubDir TOP efiler ;
 
-SOURCE = Fl_Icon_Browser.cxx EDE_Browser.cpp Util.cpp efiler.cpp ;
+SOURCE = Fl_Icon_Browser.cxx EDE_Browser.cpp Util.cpp efiler.cpp fileops.cpp filesystem.cpp ;
 
 EdeProgram efiler : $(SOURCE) ;
 #EdeManual doc/efiler.txt : doc/efiler.jpg ;

efiler/filesystem.cpp

@@ -0,0 +1,102 @@
+/*
+ * $Id$
+ *
+ * EFiler - EDE File Manager
+ * Part of Equinox Desktop Environment (EDE).
+ * Copyright (c) 2000-2006 EDE Authors.
+ *
+ * This program is licenced under terms of the
+ * GNU General Public Licence version 2 or newer.
+ * See COPYING for details.
+ */
+
+// Functions for filesystems
+
+#include "filesystem.h"
+
+#include <string.h>
+#include <stdio.h>
+#include <sys/vfs.h> // used for statfs()
+
+// for fltk compatibility:
+#define PATH_MAX 256
+
+char filesystems[50][PATH_MAX]; // must be global
+
+
+// Read filesystems - adapted from fltk file chooser
+int get_filesystems() {
+	FILE	*mtab;		// /etc/mtab or /etc/mnttab file
+
+	// Results are cached in a static array
+	static int fs_number=0;
+
+	// On first access read filesystems
+	if (fs_number == 0) {
+		mtab = fopen("/etc/mnttab", "r");	// Fairly standard
+		if (mtab == NULL)
+			mtab = fopen("/etc/mtab", "r");	// More standard
+		if (mtab == NULL)
+			mtab = fopen("/etc/fstab", "r");	// Otherwise fallback to full list
+		if (mtab == NULL)
+			mtab = fopen("/etc/vfstab", "r");	// Alternate full list file
+
+		char	line[PATH_MAX];	// Input line
+		char	device[PATH_MAX], mountpoint[PATH_MAX], fs[PATH_MAX];
+		while (mtab!= NULL && fgets(line, sizeof(line), mtab) != NULL) {
+			if (line[0] == '#' || line[0] == '\n')
+				continue;
+			if (sscanf(line, "%s%s%s", device, mountpoint, fs) != 3)
+				continue;
+			strcpy(filesystems[fs_number],mountpoint);
+			fs_number++;
+		}	
+		fclose (mtab);
+
+		if (fs_number == 0) return 0; // error reading mtab/fstab
+	}
+	return fs_number;
+}
+
+
+// Get mount point of filesystem for given file
+const char* find_fs_for(const char* file) {
+	int fs_number = get_filesystems();
+	if (fs_number==0) return 0; // error reading mtab/fstab
+
+	// Find filesystem for file (largest mount point match)
+	char *max;
+	int maxlen = 0;
+	for (int i=0; i<fs_number; i++) {
+		int mylen = strlen(filesystems[i]);
+		if ((strncmp(file,filesystems[i],mylen)==0) && (mylen>maxlen)) {
+			maxlen=mylen;
+			max = (char*)filesystems[i];
+		}
+	}
+	if (maxlen == 0) return 0; // doesn't match any fs? there should always be root
+	return max;
+}
+
+
+// Tests if two files are on the same filesystem
+// This can't use statfs cause there is no way to compare 
+// two "struct statfs" values
+bool is_on_same_fs(const char* file1, const char* file2) {
+	const char* fs1 = find_fs_for(file1);
+	const char* fs2 = find_fs_for(file2);
+	// See if file2 matches the same filesystem
+	return (strcmp(fs1,fs2)==0);
+}
+
+
+// Find filesystem total size and free space (in bytes)
+// dir is any directory on the filesystem
+bool fs_usage(const char* dir, double &total, double &free) {
+	static struct statfs statfs_buffer;
+	if (statfs(dir, &statfs_buffer)!=0) return false;
+
+	total = double(statfs_buffer.f_bsize) * statfs_buffer.f_blocks;
+	free = double(statfs_buffer.f_bsize) * statfs_buffer.f_bavail; // This is what df returns
+	return true;
+}

efiler/filesystem.h

@@ -0,0 +1,23 @@
+/*
+ * $Id$
+ *
+ * EFiler - EDE File Manager
+ * Part of Equinox Desktop Environment (EDE).
+ * Copyright (c) 2000-2006 EDE Authors.
+ *
+ * This program is licenced under terms of the
+ * GNU General Public Licence version 2 or newer.
+ * See COPYING for details.
+ */
+
+// Functions for filesystems
+
+// Get mount point of filesystem for given file
+const char* find_fs_for(const char* file);
+
+// Tests if two files are on the same filesystem
+bool is_on_same_fs(const char* file1, const char* file2);
+
+// Find filesystem total size and free space (in bytes)
+// dir is any directory on the filesystem
+bool fs_usage(const char* dir, double &total, double &free);