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  1. /*
  2.  * Copyright (c) 2006 Josef Cejka
  3.  * Copyright (c) 2006 Jakub Vana
  4.  * All rights reserved.
  5.  *
  6.  * Redistribution and use in source and binary forms, with or without
  7.  * modification, are permitted provided that the following conditions
  8.  * are met:
  9.  *
  10.  * - Redistributions of source code must retain the above copyright
  11.  *   notice, this list of conditions and the following disclaimer.
  12.  * - Redistributions in binary form must reproduce the above copyright
  13.  *   notice, this list of conditions and the following disclaimer in the
  14.  *   documentation and/or other materials provided with the distribution.
  15.  * - The name of the author may not be used to endorse or promote products
  16.  *   derived from this software without specific prior written permission.
  17.  *
  18.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28.  */
  29.  
  30. /** @addtogroup libc
  31.  * @{
  32.  */
  33. /** @file
  34.  */
  35.  
  36. #include <io/io.h>
  37. #include <io/stream.h>
  38. #include <string.h>
  39. #include <malloc.h>
  40. #include <libc.h>
  41. #include <ipc/ipc.h>
  42. #include <ipc/ns.h>
  43. #include <ipc/fb.h>
  44. #include <ipc/services.h>
  45. #include <console.h>
  46. #include <unistd.h>
  47. #include <async.h>
  48.  
  49. #define FDS 32
  50.  
  51. typedef struct stream_t {
  52.     pwritefn_t w;
  53.     preadfn_t r;
  54.     void * param;
  55.     int phone;
  56. } stream_t;
  57.  
  58. static int console_phone = -1;
  59. static stream_t streams[FDS];
  60.  
  61. static ssize_t write_stderr(void *param, const void *buf, size_t count)
  62. {
  63.     return count;
  64. }
  65.  
  66. static ssize_t read_stdin(void *param, void *buf, size_t count)
  67. {
  68.     ipcarg_t r0,r1;
  69.     size_t i = 0;
  70.  
  71.     while (i < count) {
  72.         if (async_req_2(streams[0].phone, CONSOLE_GETCHAR, 0, 0, &r0, &r1) < 0) {
  73.             return -1;
  74.         }
  75.         ((char *) buf)[i++] = r0;
  76.     }
  77.     return i;
  78. }
  79.  
  80. static ssize_t write_stdout(void *param, const void *buf, size_t count)
  81. {
  82.     int i;
  83.  
  84.     for (i = 0; i < count; i++)
  85.         async_msg(streams[1].phone, CONSOLE_PUTCHAR, ((const char *) buf)[i]);
  86.    
  87.     return count;
  88. }
  89.  
  90. static stream_t open_stdin(void)
  91. {
  92.     stream_t stream;
  93.    
  94.     if (console_phone < 0) {
  95.         while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {
  96.             usleep(10000);
  97.         }
  98.     }
  99.    
  100.     stream.r = read_stdin;
  101.     stream.w = NULL;
  102.     stream.param = 0;
  103.     stream.phone = console_phone;
  104.    
  105.     return stream;
  106. }
  107.  
  108. static stream_t open_stdout(void)
  109. {
  110.     stream_t stream;
  111.  
  112.     if (console_phone < 0) {
  113.         while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {
  114.             usleep(10000);
  115.         }
  116.     }
  117.    
  118.     stream.r = NULL;
  119.     stream.w = write_stdout;
  120.     stream.phone = console_phone;
  121.     stream.param = 0;
  122.    
  123.     return stream;
  124. }
  125.  
  126. static ssize_t write_null(void *param, const void *buf, size_t count)
  127. {
  128.     return count;
  129. }
  130.  
  131. fd_t open(const char *fname, int flags)
  132. {
  133.     int c = 0;
  134.  
  135.     while (((streams[c].w) || (streams[c].r)) && (c < FDS))
  136.         c++;
  137.    
  138.     if (c == FDS)
  139.         return EMFILE;
  140.    
  141.     if (!strcmp(fname, "stdin")) {
  142.         streams[c] = open_stdin();
  143.         return c;
  144.     }
  145.    
  146.     if (!strcmp(fname, "stdout")) {
  147.         streams[c] = open_stdout();
  148.         return c;
  149.     }
  150.    
  151.     if (!strcmp(fname, "stderr")) {
  152.         streams[c].w = write_stderr;
  153.         return c;
  154.     }
  155.    
  156.     if (!strcmp(fname, "null")) {
  157.         streams[c].w = write_null;
  158.         return c;
  159.     }
  160.    
  161.     return -1;
  162. }
  163.  
  164.  
  165. ssize_t write(int fd, const void *buf, size_t count)
  166. {
  167.     if (fd < FDS && streams[fd].w)
  168.         return streams[fd].w(streams[fd].param, buf, count);
  169.    
  170.     return 0;
  171. }
  172.  
  173. ssize_t read(int fd, void *buf, size_t count)
  174. {
  175.     if (fd < FDS && streams[fd].r)
  176.         return streams[fd].r(streams[fd].param, buf, count);
  177.    
  178.     return 0;
  179. }
  180.  
  181. int get_fd_phone(int fd)
  182. {
  183.     if (fd >= FDS || fd < 0)
  184.         return -1;
  185.     return streams[fd].phone;
  186. }
  187.  
  188. /** @}
  189.  */
  190.