[patch] fuse_main.3 - fix example to compile without warnings and apply style changes

[Edgar Pettijohn]

Index: fuse_main.3
===================================================================
RCS file: /cvs/src/lib/libfuse/fuse_main.3,v
retrieving revision 1.6
diff -u -p -u -r1.6 fuse_main.3
--- fuse_main.3 28 Nov 2018 21:19:11 -0000      1.6
+++ fuse_main.3 23 May 2020 18:11:16 -0000
@@ -56,39 +56,46 @@ Here is a simple example of a FUSE imple
 
 static int
 fs_readdir(const char *path, void *data, fuse_fill_dir_t filler,
-    off_t off, struct fuse_file_info *ffi)
+           off_t off, struct fuse_file_info *ffi)
 {
        if (strcmp(path, "/") != 0)
-               return (-ENOENT);
+               return -ENOENT;
 
        filler(data, ".", NULL, 0);
        filler(data, "..", NULL, 0);
        filler(data, "file", NULL, 0);
-       return (0);
+       return 0;
 }
 
 static int
 fs_read(const char *path, char *buf, size_t size, off_t off,
-    struct fuse_file_info *ffi)
+        struct fuse_file_info *ffi)
 {
-       if (off >= 5)
-               return (0);
+       size_t len;
+       const char *file_contents = "fuse filesystem example\\n";
 
-       size = 5 - off;
-       memcpy(buf, "data." + off, size);
-       return (size);
+       len = strlen(file_contents);
+
+       if (off < len) {
+               if (off + size > len)
+                       size = len - off;
+               memcpy(buf, file_contents + off, size);
+       } else
+               size = 0;
+
+       return size;
 }
 
 static int
 fs_open(const char *path, struct fuse_file_info *ffi)
 {
        if (strncmp(path, "/file", 10) != 0)
-               return (-ENOENT);
+               return -ENOENT;
 
        if ((ffi->flags & 3) != O_RDONLY)
-               return (-EACCES);
+               return -EACCES;
 
-       return (0);
+       return 0;
 }
 
 static int
@@ -104,10 +111,10 @@ fs_getattr(const char *path, struct stat
                st->st_nlink = 1;
                st->st_size = 5;
        } else {
-               return (-ENOENT);
+               return -ENOENT;
        }
 
-       return (0);
+       return 0;
 }
 
 struct fuse_operations fsops = {
@@ -118,9 +125,9 @@ struct fuse_operations fsops = {
 };
 
 int
-main(int ac, char **av)
+main(int argc, char **argv)
 {
-       return (fuse_main(ac, av, &fsops, NULL));
+       return (fuse_main(argc, argv, &fsops, NULL));
 }
 .Ed
 .Sh SEE ALSO