source: trunk/kernel/syscalls/sys_mkfifo.c @ 569

Last change on this file since 569 was 566, checked in by alain, 6 years ago

Complete restructuration of kernel locks.

File size: 2.1 KB
RevLine 
[1]1/*
[23]2 * sys_mkfifo.c - creates a named FIFO file.
[304]3 *
[23]4 * Author    Alain Greiner (2016,2017)
[1]5 *
[23]6 * Copyright (c) UPMC Sorbonne Universites
[1]7 *
[23]8 * This file is part of ALMOS-MKH.
9 *
10 * ALMOS-MKH is free software; you can redistribute it and/or modify it
[1]11 * under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; version 2.0 of the License.
13 *
[23]14 * ALMOS-MKH is distributed in the hope that it will be useful, but
[1]15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
[23]20 * along with ALMOS-MKH; if not, write to the Free Software Foundation,
[1]21 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
[457]24#include <hal_kernel_types.h>
[23]25#include <hal_uspace.h>
26#include <printk.h>
[1]27#include <vfs.h>
[23]28#include <process.h>
[1]29#include <thread.h>
30
[23]31////////////////////////////////////
32int sys_mkfifo ( char    * pathname,
[566]33                 uint32_t  mode __attribute__((unused)) )
[1]34{
[23]35    error_t        error;
36    char           kbuf[CONFIG_VFS_MAX_PATH_LENGTH];
[1]37
[23]38    thread_t  * this    = CURRENT_THREAD;
[304]39    process_t * process = this->process;
[1]40
[23]41    // check fd_array not full
[304]42    if( process_fd_array_full() )
43    {
[23]44        printk("\n[ERROR] in %s : file descriptor array full for process %x\n",
45               __FUNCTION__ , process->pid );
[304]46        this->errno = ENFILE;
[23]47        return -1;
[304]48    }
[23]49
[407]50    // check pathname length
51    if( hal_strlen_from_uspace( pathname ) >= CONFIG_VFS_MAX_PATH_LENGTH )
[23]52    {
53        printk("\n[ERROR] in %s : pathname too long\n", __FUNCTION__ );
[304]54        this->errno = ENFILE;
[23]55        return -1;
56    }
57
[407]58    // copy pathname in kernel space
59    hal_strcpy_from_uspace( kbuf , pathname , CONFIG_VFS_MAX_PATH_LENGTH );
60
[566]61    printk("\n[ERROR] in %s : not implemented yet\n", __FUNCTION__ );
62    return -1;
[23]63
64    if( error )
[304]65    {
[23]66        printk("\n[ERROR] in %s : cannot create named FIFO %s\n",
67               __FUNCTION__ , kbuf );
[304]68        this->errno = error;
69        return -1;
70    }
[23]71
[304]72    return 0;
73
[23]74} // end sys_mkfifo()
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