lib/libc_r/uthread/uthread_open.c

   1 /*
   2  * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by John Birrell.
  16  * 4. Neither the name of the author nor the names of any co-contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * $FreeBSD: src/lib/libc_r/uthread/uthread_open.c,v 1.9.2.2 2002/10/22 14:44:03 fjoe Exp $
  33  * $DragonFly: src/lib/libc_r/uthread/uthread_open.c,v 1.2 2003/06/17 04:26:48 dillon Exp $
  34  *
  35  */
  36 #include <stdarg.h>
  37 #include <unistd.h>
  38 #include <fcntl.h>
  39 #include <dirent.h>
  40 #include <errno.h>
  41 #include <pthread.h>
  42 #include "pthread_private.h"
  43
  44 int
  45 _open(const char *path, int flags,...)
  46 {
  47         int     fd;
  48         int     mode = 0;
  49         va_list ap;
  50
  51         /* Check if the file is being created: */
  52         if (flags & O_CREAT) {
  53                 /* Get the creation mode: */
  54                 va_start(ap, flags);
  55                 mode = va_arg(ap, int);
  56                 va_end(ap);
  57         }
  58         /* Open the file: */
  59         if ((fd = __sys_open(path, flags, mode)) < 0) {
  60         }
  61         /* Initialise the file descriptor table entry: */
  62         else if (_thread_fd_table_init(fd) != 0) {
  63                 /* Quietly close the file: */
  64                 __sys_close(fd);
  65
  66                 /* Reset the file descriptor: */
  67                 fd = -1;
  68         }
  69
  70         /* Return the file descriptor or -1 on error: */
  71         return (fd);
  72 }
  73
  74 int
  75 open(const char *path, int flags,...)
  76 {
  77         int     ret;
  78         int     mode = 0;
  79         va_list ap;
  80
  81         _thread_enter_cancellation_point();
  82
  83         /* Check if the file is being created: */
  84         if (flags & O_CREAT) {
  85                 /* Get the creation mode: */
  86                 va_start(ap, flags);
  87                 mode = va_arg(ap, int);
  88                 va_end(ap);
  89         }
  90
  91         ret = _open(path, flags, mode);
  92         _thread_leave_cancellation_point();
  93
  94         return ret;
  95 }
  96
  97 int
  98 _openat(int fdbase, const char *path, int flags,...)
  99 {
 100         int     fd;
 101         int     mode = 0;
 102         va_list ap;
 103         int     error;
 104
 105         if ((error = _FD_LOCK(fdbase, FD_READ, NULL)) != 0)
 106                 return (error);
 107
 108         /* Check if the file is being created: */
 109         if (flags & O_CREAT) {
 110                 /* Get the creation mode: */
 111                 va_start(ap, flags);
 112                 mode = va_arg(ap, int);
 113                 va_end(ap);
 114         }
 115         /* Open the file: */
 116         if ((fd = __sys_openat(fdbase, path, flags, mode)) < 0) {
 117         }
 118         /* Initialise the file descriptor table entry: */
 119         else if (_thread_fd_table_init(fd) != 0) {
 120                 /* Quietly close the file: */
 121                 __sys_close(fd);
 122
 123                 /* Reset the file descriptor: */
 124                 fd = -1;
 125         }
 126
 127         _FD_UNLOCK(fdbase, FD_READ);
 128
 129         /* Return the file descriptor or -1 on error: */
 130         return (fd);
 131 }
 132
 133 int
 134 openat(int fd, const char *path, int flags,...)
 135 {
 136         int     ret;
 137         int     mode = 0;
 138         va_list ap;
 139
 140         _thread_enter_cancellation_point();
 141
 142         /* Check if the file is being created: */
 143         if (flags & O_CREAT) {
 144                 /* Get the creation mode: */
 145                 va_start(ap, flags);
 146                 mode = va_arg(ap, int);
 147                 va_end(ap);
 148         }
 149
 150         ret = _openat(fd, path, flags, mode);
 151         _thread_leave_cancellation_point();
 152
 153         return ret;
 154 }