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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.  
  31. #include <io/io.h>
  32. #include <io/stream.h>
  33. #include <string.h>
  34. #include <malloc.h>
  35. #include <libc.h>
  36. #include <ipc/ipc.h>
  37. #include <ipc/ns.h>
  38. #include <ipc/fb.h>
  39. #include <ipc/services.h>
  40. #include <console.h>
  41. #include <unistd.h>
  42.  
  43. #define FDS 32
  44.  
  45. typedef struct stream_t {
  46.     pwritefn_t w;
  47.     preadfn_t r;
  48.     void * param;
  49. } stream_t;
  50.  
  51. int console_phone = -1;
  52.  
  53. stream_t streams[FDS] = {{0, 0, 0}};
  54.  
  55. static ssize_t write_stderr(void *param, const void *buf, size_t count)
  56. {
  57.     return count;
  58. }
  59.  
  60. static ssize_t read_stdin(void *param, void *buf, size_t count)
  61. {
  62.     ipcarg_t r0,r1;
  63.     size_t i = 0;
  64.  
  65.     while (i < count) {
  66.         if (ipc_call_sync_2(console_phone, CONSOLE_GETCHAR, 0, 0, &r0, &r1) < 0) {
  67.             return -1;
  68.         }
  69.         ((char *)buf)[i++] = r0;
  70.     }
  71.     return i;
  72. }
  73.  
  74. static ssize_t write_stdout(void *param, const void *buf, size_t count)
  75. {
  76.     int i;
  77.     ipcarg_t r0,r1;
  78.  
  79.     for (i = 0; i < count; i++)
  80.         send_call(console_phone, CONSOLE_PUTCHAR, ((const char *)buf)[i]);
  81.    
  82.     return count;
  83. }
  84.  
  85.  
  86.  
  87. static stream_t open_stdin(void)
  88. {
  89.     stream_t stream;
  90.     int phoneid;
  91.     int res;
  92.    
  93.     if (console_phone < 0) {
  94.         while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {
  95.             usleep(10000);
  96.         }
  97.     }
  98.    
  99.     stream.r = read_stdin;
  100.     stream.param = 0;
  101.     return stream;
  102. }
  103.  
  104. static stream_t open_stdout(void)
  105. {
  106.     stream_t stream;
  107.     int res;
  108.    
  109.     if (console_phone < 0) {
  110.         while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {
  111.             usleep(10000);
  112.         }
  113.     }
  114.    
  115.     stream.w = write_stdout;
  116.     stream.param = 0;
  117.     return stream;
  118. }
  119.  
  120. static ssize_t write_null(void *param, const void *buf, size_t count)
  121. {
  122.     return count;
  123. }
  124.  
  125.  
  126. fd_t open(const char *fname, int flags)
  127. {
  128.     int c = 0;
  129.    
  130.     while (((streams[c].w) || (streams[c].r)) && (c < FDS))
  131.         c++;
  132.     if (c == FDS)
  133.         return EMFILE;
  134.    
  135.     if (!strcmp(fname, "stdin")) {
  136.         streams[c] = open_stdin();
  137.         return c;
  138.     }
  139.    
  140.     if (!strcmp(fname, "stdout")) {
  141.         //streams[c].w = write_stdout;
  142.         //return c;
  143.         streams[c] = open_stdout();
  144.         return c;
  145.     }
  146.    
  147.     if (!strcmp(fname, "stderr")) {
  148.         streams[c].w = write_stderr;
  149.         return c;
  150.     }
  151.     if (!strcmp(fname, "null")) {
  152.         streams[c].w = write_null;
  153.         return c;
  154.     }
  155. }
  156.  
  157.  
  158. ssize_t write(int fd, const void *buf, size_t count)
  159. {
  160.     if (fd < FDS)
  161.         return streams[fd].w(streams[fd].param, buf, count);
  162.    
  163.     return 0;
  164. }
  165.  
  166. ssize_t read(int fd, void *buf, size_t count)
  167. {
  168.     if (fd < FDS)
  169.         return streams[fd].r(streams[fd].param, buf, count);
  170.    
  171.     return 0;
  172. }
  173.  
  174.