Changeset b19e892 in mainline for uspace/lib/c/generic/vfs/vfs.c

Timestamp:

2017-04-02T10:39:13Z (8 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

9c4cf0d

Parents:

80743a1

Message:

Merge open() with posix_open() and provide vfs_lookup_open() instead

vfs_lookup_open() is really just a convenience wrapper around
vfs_lookup() and vfs_open().

File:

• uspace/lib/c/generic/vfs/vfs.c (modified) (4 diffs)

uspace/lib/c/generic/vfs/vfs.c

@@ -41 +41 @@
 #include <unistd.h>
 #include <dirent.h>
-#include <fcntl.h>
 #include <stdio.h>
 #include <sys/types.h>
@@ -155 +154 @@
 }
 
-int _vfs_open(int fildes, int mode)
-{
-        async_exch_t *exch = vfs_exchange_begin();
-        sysarg_t rc = async_req_2_0(exch, VFS_IN_OPEN, fildes, mode);
-        vfs_exchange_end(exch);
-        
-        return (int) rc;
+int vfs_open(int file, int mode)
+{
+        async_exch_t *exch = vfs_exchange_begin();
+        int rc = async_req_2_0(exch, VFS_IN_OPEN, file, mode);
+        vfs_exchange_end(exch);
+        
+        return rc;
+}
+
+int vfs_lookup_open(const char *path, int flags, int mode)
+{
+        int file = vfs_lookup(path, flags);
+        if (file < 0)
+                return file;
+
+        int rc = vfs_open(file, mode);
+        if (rc != EOK) {
+                close(file);
+                return rc;
+        }
+        
+        return file;
 }
 
@@ -353 +367 @@
 }
 
-static int walk_flags(int oflags)
-{
-        int flags = 0;
-        if (oflags & O_CREAT) {
-                if (oflags & O_EXCL)
-                        flags |= WALK_MUST_CREATE;
-                else
-                        flags |= WALK_MAY_CREATE;
-        }
-        return flags;
-}
-
-/** Open file.
- *
- * @param path File path
- * @param oflag O_xxx flags
- * @param mode File mode (only with O_CREAT)
- *
- * @return Nonnegative file descriptor on success. On error -1 is returned
- *         and errno is set.
- */
-int open(const char *path, int oflag, ...)
-{
-        if (((oflag & (O_RDONLY | O_WRONLY | O_RDWR)) == 0) ||
-            ((oflag & (O_RDONLY | O_WRONLY)) == (O_RDONLY | O_WRONLY)) ||
-            ((oflag & (O_RDONLY | O_RDWR)) == (O_RDONLY | O_RDWR)) ||
-            ((oflag & (O_WRONLY | O_RDWR)) == (O_WRONLY | O_RDWR))) {
-                errno = EINVAL;
-                return -1;
-        }
-        
-        int fd = vfs_lookup(path, walk_flags(oflag) | WALK_REGULAR);
-        if (fd < 0) {
-                errno = fd;
-                return -1;
-        }
-        
-        int mode =
-            ((oflag & O_RDWR) ? MODE_READ | MODE_WRITE : 0) |
-            ((oflag & O_RDONLY) ? MODE_READ : 0) |
-            ((oflag & O_WRONLY) ? MODE_WRITE : 0) |
-            ((oflag & O_APPEND) ? MODE_APPEND : 0);
-        
-        int rc = _vfs_open(fd, mode); 
-        if (rc < 0) {
-                close(fd);
-                errno = rc;
-                return -1;
-        }
-        
-        if (oflag & O_TRUNC) {
-                assert(oflag & O_WRONLY || oflag & O_RDWR);
-                assert(!(oflag & O_APPEND));
-                
-                (void) vfs_resize(fd, 0);
-        }
-
-        return fd;
-}
-
 /** Close file.
  *
@@ -703 +657 @@
         }
         
-        int rc = _vfs_open(fd, MODE_READ);
+        int rc = vfs_open(fd, MODE_READ);
         if (rc < 0) {
                 free(dirp);