Implemented some more calls in unistd.h.

Replaced the unused syscall for getdtablesize() with one for access().
Implemented sys_access() and added it to the file system interface.
Removed the fs function interface from vfs.h.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@738 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kernel/Jamfile

@@ -348,6 +348,8 @@ KernelStaticLibraryObjects libc.a :
 	<$(SOURCE_GRIST)!libc!system>wrappers.o
 	<$(SOURCE_GRIST)!libc!system!arch!$(OBOS_ARCH)>atomic.o
 
+	<$(SOURCE_GRIST)!libc!unistd>access.o
+	<$(SOURCE_GRIST)!libc!unistd>chown.o
 	<$(SOURCE_GRIST)!libc!unistd>close.o
 	<$(SOURCE_GRIST)!libc!unistd>dup.o
 	<$(SOURCE_GRIST)!libc!unistd>dup2.o
@@ -360,6 +362,7 @@ KernelStaticLibraryObjects libc.a :
 	<$(SOURCE_GRIST)!libc!unistd>write.o
 	<$(SOURCE_GRIST)!libc!unistd>sleep.o
 	<$(SOURCE_GRIST)!libc!unistd>usleep.o
+	<$(SOURCE_GRIST)!libc!unistd>truncate.o
 	<$(SOURCE_GRIST)!libc!unistd>ioctl.o
 	<$(SOURCE_GRIST)!libc!unistd>mount.o
 	<$(SOURCE_GRIST)!libc!unistd>conf.o
@@ -466,6 +469,8 @@ KernelLd libc.so :
 	<$(SOURCE_GRIST)!libc!system>wrappers.o
 	<$(SOURCE_GRIST)!libc!system!arch!$(OBOS_ARCH)>atomic.o
 
+	<$(SOURCE_GRIST)!libc!unistd>access.o
+	<$(SOURCE_GRIST)!libc!unistd>chown.o
 	<$(SOURCE_GRIST)!libc!unistd>close.o
 	<$(SOURCE_GRIST)!libc!unistd>dup.o
 	<$(SOURCE_GRIST)!libc!unistd>dup2.o
@@ -478,6 +483,7 @@ KernelLd libc.so :
 	<$(SOURCE_GRIST)!libc!unistd>write.o
 	<$(SOURCE_GRIST)!libc!unistd>sleep.o
 	<$(SOURCE_GRIST)!libc!unistd>usleep.o
+	<$(SOURCE_GRIST)!libc!unistd>truncate.o
 	<$(SOURCE_GRIST)!libc!unistd>ioctl.o
 	<$(SOURCE_GRIST)!libc!unistd>mount.o
 	<$(SOURCE_GRIST)!libc!unistd>conf.o

src/kernel/core/fs/bootfs.c

@@ -1034,6 +1034,7 @@ static struct fs_calls bootfs_calls = {
 	&bootfs_unlink,
 	&bootfs_rename,
 
+	NULL,	// access
 	&bootfs_read_stat,
 	&bootfs_write_stat,
 

src/kernel/core/fs/devfs.c

@@ -1072,6 +1072,7 @@ static struct fs_calls devfs_calls = {
 	&devfs_unlink,
 	&devfs_rename,
 
+	NULL,	// access
 	&devfs_read_stat,
 	&devfs_write_stat,
 

src/kernel/core/fs/rootfs.c

@@ -925,6 +925,7 @@ static struct fs_calls rootfs_calls = {
 	&rootfs_unlink,
 	&rootfs_rename,
 
+	NULL,	// fs_access()
 	&rootfs_read_stat,
 	&rootfs_write_stat,
 

src/kernel/core/fs/vfs.c

@@ -2111,6 +2111,27 @@ common_unlink(char *path, bool kernel)
 }
 
 
+static int
+common_access(char *path, int mode, bool kernel)
+{
+	struct vnode *vnode;
+	int status;
+
+	status = path_to_vnode(path, true, &vnode, kernel);
+	if (status < B_OK)
+		return status;
+
+	if (FS_CALL(vnode,fs_access) != NULL)
+		status = FS_CALL(vnode,fs_access)(vnode->mount->cookie, vnode->private_node, mode);
+	else
+		status = EOPNOTSUPP;
+
+	put_vnode(vnode);
+
+	return status;
+}
+
+
 static int
 common_rename(char *path, char *newPath, bool kernel)
 {
@@ -2749,6 +2770,18 @@ sys_rename(const char *oldpath, const char *newpath)
 }
 
 
+int
+sys_access(const char *path, int mode)
+{
+	char pathCopy[SYS_MAX_PATH_LEN + 1];
+	int status;
+
+	strlcpy(pathCopy, path, SYS_MAX_PATH_LEN - 1);
+
+	return common_access(pathCopy, mode, true);
+}
+
+
 int
 sys_read_stat(const char *path, bool traverseLeafLink, struct stat *stat)
 {
@@ -3127,18 +3160,18 @@ user_create_symlink(const char *userPath, const char *userToPath, int mode)
 
 
 int
-user_unlink(const char *upath)
+user_unlink(const char *userPath)
 {
 	char path[SYS_MAX_PATH_LEN + 1];
-	int rc;
+	int status;
 
-	if ((addr)upath >= KERNEL_BASE && (addr)upath <= KERNEL_TOP)
-		return ERR_VM_BAD_USER_MEMORY;
+	if (!CHECK_USER_ADDRESS(userPath))
+		return B_BAD_ADDRESS;
 
-	rc = user_strncpy(path, upath, SYS_MAX_PATH_LEN);
-	if (rc < 0)
-		return rc;
-	path[SYS_MAX_PATH_LEN] = 0;
+	status = user_strncpy(path, userPath, SYS_MAX_PATH_LEN - 1);
+	if (status < 0)
+		return status;
+	path[SYS_MAX_PATH_LEN - 1] = '\0';
 
 	return common_unlink(path, false);
 }
@@ -3171,6 +3204,24 @@ user_rename(const char *uoldpath, const char *unewpath)
 }
 
 
+int
+user_access(const char *userPath, int mode)
+{
+	char path[SYS_MAX_PATH_LEN + 1];
+	int status;
+
+	if (!CHECK_USER_ADDRESS(userPath))
+		return B_BAD_ADDRESS;
+
+	status = user_strncpy(path, userPath, SYS_MAX_PATH_LEN - 1);
+	if (status < 0)
+		return status;
+	path[SYS_MAX_PATH_LEN - 1] = '\0';
+
+	return common_access(path, mode, false);
+}
+
+
 int
 user_read_stat(const char *userPath, bool traverseLink, struct stat *userStat)
 {

src/kernel/core/syscalls.c

@@ -126,12 +126,15 @@ int syscall_dispatcher(unsigned long call_num, void *arg_buffer, uint64 *call_re
 		case SYSCALL_READ_STAT:
 			*call_ret = user_read_stat((const char *)arg0, (bool)arg1, (struct stat *)arg2);
 			break;
-		case SYSCALL_FD_STAT:
+		case SYSCALL_READ_STAT_FD:
 			*call_ret = user_fstat((int)arg0, (struct stat*)arg1);
 			break;
 		case SYSCALL_WRITE_STAT:
 			*call_ret = user_write_stat((int)arg0, (const char *)arg1, (bool)arg2, (struct stat *)arg3, (int)arg4);
 			break;
+		case SYSCALL_ACCESS:
+			*call_ret = user_access((const char *)arg0, (int)arg1);
+			break;
 		case SYSCALL_SYSTEM_TIME:
 			*call_ret = system_time();
 			break;