Changeset 2b88074b in mainline for uspace/lib/libc/include/unistd.h

Timestamp:

2009-10-29T22:06:46Z (16 years ago)

Author:

Martin Decky <martin@…>

Branches:

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

Children:

2e983c7

Parents:

14ecd6c

Message:

vfs: file descriptors housekeeping changes

• add support for allocating new file descriptors from the end of the fd range (O_DESC)
• add support for assigning of an already opened file to a free file descriptor

vfs: VFS_OUT_CLOSE is called only when the file reference count is about to drop to zero
vfs: implement VFS_IN_DUP

libc: optimize current working directory housekeeping

• using opendir() was an overkill
• allocate current working directory file descriptor from the end of the fd range using O_DESC (so it doesn't mess with the well-known descriptors 0, 1 and 2)

libc: implement dup2() (via VFS_IN_DUP)

getvc: change stdin/stdout/stderr by a slightly more elegant way (using dup2())

File:

• uspace/lib/libc/include/unistd.h (modified) (1 diff)

uspace/lib/libc/include/unistd.h

@@ -51 +51 @@
 #endif
 
+extern int dup2(int oldfd, int newfd);
+
 extern ssize_t write(int, const void *, size_t);
 extern ssize_t read(int, void *, size_t);