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  1. /*
  2.  * Copyright (c) 2006 Jakub Jermar
  3.  * Copyright (c) 2008 Jiri Svoboda
  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 <task.h>
  37. #include <libc.h>
  38. #include <stdlib.h>
  39. #include <errno.h>
  40. #include <loader/loader.h>
  41. #include <string.h>
  42. #include <ipc/ns.h>
  43. #include <macros.h>
  44. #include <async.h>
  45.  
  46. task_id_t task_get_id(void)
  47. {
  48.     task_id_t task_id;
  49.     (void) __SYSCALL1(SYS_TASK_GET_ID, (sysarg_t) &task_id);
  50.    
  51.     return task_id;
  52. }
  53.  
  54. /** Set the task name.
  55.  *
  56.  * @param name The new name, typically the command used to execute the
  57.  *             program.
  58.  *
  59.  * @return Zero on success or negative error code.
  60.  *
  61.  */
  62. int task_set_name(const char *name)
  63. {
  64.     return __SYSCALL2(SYS_TASK_SET_NAME, (sysarg_t) name, str_size(name));
  65. }
  66.  
  67. /** Create a new task by running an executable from the filesystem.
  68.  *
  69.  * This is really just a convenience wrapper over the more complicated
  70.  * loader API.
  71.  *
  72.  * @param path pathname of the binary to execute
  73.  * @param argv command-line arguments
  74.  *
  75.  * @return ID of the newly created task or zero on error.
  76.  *
  77.  */
  78. task_id_t task_spawn(const char *path, char *const args[])
  79. {
  80.     /* Connect to a program loader. */
  81.     loader_t *ldr = loader_connect();
  82.     if (ldr == NULL)
  83.         return 0;
  84.    
  85.     /* Get task ID. */
  86.     task_id_t task_id;
  87.     int rc = loader_get_task_id(ldr, &task_id);
  88.     if (rc != EOK)
  89.         goto error;
  90.    
  91.     /* Send program pathname. */
  92.     rc = loader_set_pathname(ldr, path);
  93.     if (rc != EOK)
  94.         goto error;
  95.    
  96.     /* Send arguments. */
  97.     rc = loader_set_args(ldr, args);
  98.     if (rc != EOK)
  99.         goto error;
  100.    
  101.    
  102.     /* Send default files */
  103.     inode_t *files[4];
  104.     inode_t stdin_node;
  105.     inode_t stdout_node;
  106.     inode_t stderr_node;
  107.    
  108.     if ((stdin != NULL) && (stdin != &stdin_null)) {
  109.         fnode(stdin, &stdin_node);
  110.         files[0] = &stdin_node;
  111.     } else
  112.         files[0] = NULL;
  113.    
  114.     if ((stdout != NULL) && (stdout != &stdout_klog)) {
  115.         fnode(stdout, &stdout_node);
  116.         files[1] = &stdout_node;
  117.     } else
  118.         files[1] = NULL;
  119.    
  120.     if ((stderr != NULL) && (stderr != &stdout_klog)) {
  121.         fnode(stderr, &stderr_node);
  122.         files[2] = &stderr_node;
  123.     } else
  124.         files[2] = NULL;
  125.    
  126.     files[3] = NULL;
  127.    
  128.     rc = loader_set_files(ldr, files);
  129.     if (rc != EOK)
  130.         goto error;
  131.    
  132.     /* Load the program. */
  133.     rc = loader_load_program(ldr);
  134.     if (rc != EOK)
  135.         goto error;
  136.    
  137.     /* Run it. */
  138.     rc = loader_run(ldr);
  139.     if (rc != EOK)
  140.         goto error;
  141.    
  142.     /* Success */
  143.     free(ldr);
  144.     return task_id;
  145.    
  146. error:
  147.     /* Error exit */
  148.     loader_abort(ldr);
  149.     free(ldr);
  150.    
  151.     return 0;
  152. }
  153.  
  154. int task_wait(task_id_t id)
  155. {
  156.     return (int) async_req_2_0(PHONE_NS, NS_TASK_WAIT, LOWER32(id), UPPER32(id));
  157. }
  158.  
  159. /** @}
  160.  */
  161.