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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. #include <sys/types.h>
  49.  
  50. #define FDS 32
  51.  
  52. typedef struct stream_t {
  53.     pwritefn_t w;
  54.     preadfn_t r;
  55.     void * param;
  56.     int phone;
  57. } stream_t;
  58.  
  59. static int console_phone = -1;
  60. static stream_t streams[FDS];
  61.  
  62. static ssize_t write_stderr(void *param, const void *buf, size_t count)
  63. {
  64.     return count;
  65. }
  66.  
  67. static ssize_t read_stdin(void *param, void *buf, size_t count)
  68. {
  69.     ipcarg_t r0, r1;
  70.     size_t i = 0;
  71.  
  72.     while (i < count) {
  73.         if (async_req_2(streams[0].phone, CONSOLE_GETCHAR, 0, 0, &r0,
  74.             &r1) < 0) {
  75.             return -1;
  76.         }
  77.         ((char *) buf)[i++] = r0;
  78.     }
  79.     return i;
  80. }
  81.  
  82. static ssize_t write_stdout(void *param, const void *buf, size_t count)
  83. {
  84.     int i;
  85.  
  86.     for (i = 0; i < count; i++)
  87.         async_msg(streams[1].phone, CONSOLE_PUTCHAR,
  88.             ((const char *) buf)[i]);
  89.    
  90.     return count;
  91. }
  92.  
  93. static stream_t open_stdin(void)
  94. {
  95.     stream_t stream;
  96.    
  97.     if (console_phone < 0) {
  98.         while ((console_phone = ipc_connect_me_to(PHONE_NS,
  99.             SERVICE_CONSOLE, 0)) < 0) {
  100.             usleep(10000);
  101.         }
  102.     }
  103.    
  104.     stream.r = read_stdin;
  105.     stream.w = NULL;
  106.     stream.param = 0;
  107.     stream.phone = console_phone;
  108.    
  109.     return stream;
  110. }
  111.  
  112. static stream_t open_stdout(void)
  113. {
  114.     stream_t stream;
  115.  
  116.     if (console_phone < 0) {
  117.         while ((console_phone = ipc_connect_me_to(PHONE_NS,
  118.             SERVICE_CONSOLE, 0)) < 0) {
  119.             usleep(10000);
  120.         }
  121.     }
  122.    
  123.     stream.r = NULL;
  124.     stream.w = write_stdout;
  125.     stream.phone = console_phone;
  126.     stream.param = 0;
  127.    
  128.     return stream;
  129. }
  130.  
  131. static ssize_t write_null(void *param, const void *buf, size_t count)
  132. {
  133.     return count;
  134. }
  135.  
  136. fd_t open(const char *fname, int flags)
  137. {
  138.     int c = 0;
  139.  
  140.     while (((streams[c].w) || (streams[c].r)) && (c < FDS))
  141.         c++;
  142.    
  143.     if (c == FDS)
  144.         return EMFILE;
  145.    
  146.     if (!strcmp(fname, "stdin")) {
  147.         streams[c] = open_stdin();
  148.         return c;
  149.     }
  150.    
  151.     if (!strcmp(fname, "stdout")) {
  152.         streams[c] = open_stdout();
  153.         return c;
  154.     }
  155.    
  156.     if (!strcmp(fname, "stderr")) {
  157.         streams[c].w = write_stderr;
  158.         return c;
  159.     }
  160.    
  161.     if (!strcmp(fname, "null")) {
  162.         streams[c].w = write_null;
  163.         return c;
  164.     }
  165.    
  166.     return -1;
  167. }
  168.  
  169.  
  170. ssize_t write(int fd, const void *buf, size_t count)
  171. {
  172.     if (fd < FDS && streams[fd].w)
  173.         return streams[fd].w(streams[fd].param, buf, count);
  174.    
  175.     return 0;
  176. }
  177.  
  178. ssize_t read(int fd, void *buf, size_t count)
  179. {
  180.     if (fd < FDS && streams[fd].r)
  181.         return streams[fd].r(streams[fd].param, buf, count);
  182.    
  183.     return 0;
  184. }
  185.  
  186. int get_fd_phone(int fd)
  187. {
  188.     if (fd >= FDS || fd < 0)
  189.         return -1;
  190.     return streams[fd].phone;
  191. }
  192.  
  193. /** @}
  194.  */
  195.