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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,
  73.             &r1) < 0) {
  74.             return -1;
  75.         }
  76.         ((char *) buf)[i++] = r0;
  77.     }
  78.     return i;
  79. }
  80.  
  81. static ssize_t write_stdout(void *param, const void *buf, size_t count)
  82. {
  83.     int i;
  84.  
  85.     for (i = 0; i < count; i++)
  86.         async_msg(streams[1].phone, CONSOLE_PUTCHAR,
  87.             ((const char *) buf)[i]);
  88.    
  89.     return count;
  90. }
  91.  
  92. static stream_t open_stdin(void)
  93. {
  94.     stream_t stream;
  95.    
  96.     if (console_phone < 0) {
  97.         while ((console_phone = ipc_connect_me_to(PHONE_NS,
  98.             SERVICE_CONSOLE, 0)) < 0) {
  99.             usleep(10000);
  100.         }
  101.     }
  102.    
  103.     stream.r = read_stdin;
  104.     stream.w = NULL;
  105.     stream.param = 0;
  106.     stream.phone = console_phone;
  107.    
  108.     return stream;
  109. }
  110.  
  111. static stream_t open_stdout(void)
  112. {
  113.     stream_t stream;
  114.  
  115.     if (console_phone < 0) {
  116.         while ((console_phone = ipc_connect_me_to(PHONE_NS,
  117.             SERVICE_CONSOLE, 0)) < 0) {
  118.             usleep(10000);
  119.         }
  120.     }
  121.    
  122.     stream.r = NULL;
  123.     stream.w = write_stdout;
  124.     stream.phone = console_phone;
  125.     stream.param = 0;
  126.    
  127.     return stream;
  128. }
  129.  
  130. static ssize_t write_null(void *param, const void *buf, size_t count)
  131. {
  132.     return count;
  133. }
  134.  
  135. fd_t open(const char *fname, int flags)
  136. {
  137.     int c = 0;
  138.  
  139.     while (((streams[c].w) || (streams[c].r)) && (c < FDS))
  140.         c++;
  141.    
  142.     if (c == FDS)
  143.         return EMFILE;
  144.    
  145.     if (!strcmp(fname, "stdin")) {
  146.         streams[c] = open_stdin();
  147.         return c;
  148.     }
  149.    
  150.     if (!strcmp(fname, "stdout")) {
  151.         streams[c] = open_stdout();
  152.         return c;
  153.     }
  154.    
  155.     if (!strcmp(fname, "stderr")) {
  156.         streams[c].w = write_stderr;
  157.         return c;
  158.     }
  159.    
  160.     if (!strcmp(fname, "null")) {
  161.         streams[c].w = write_null;
  162.         return c;
  163.     }
  164.    
  165.     return -1;
  166. }
  167.  
  168.  
  169. ssize_t write(int fd, const void *buf, size_t count)
  170. {
  171.     if (fd < FDS && streams[fd].w)
  172.         return streams[fd].w(streams[fd].param, buf, count);
  173.    
  174.     return 0;
  175. }
  176.  
  177. ssize_t read(int fd, void *buf, size_t count)
  178. {
  179.     if (fd < FDS && streams[fd].r)
  180.         return streams[fd].r(streams[fd].param, buf, count);
  181.    
  182.     return 0;
  183. }
  184.  
  185. int get_fd_phone(int fd)
  186. {
  187.     if (fd >= FDS || fd < 0)
  188.         return -1;
  189.     return streams[fd].phone;
  190. }
  191.  
  192. /** @}
  193.  */
  194.