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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.  
  42. task_id_t task_get_id(void)
  43. {
  44.     task_id_t task_id;
  45.  
  46.     (void) __SYSCALL1(SYS_TASK_GET_ID, (sysarg_t) &task_id);
  47.  
  48.     return task_id;
  49. }
  50.  
  51. /** Create a new task by running an executable from the filesystem.
  52.  *
  53.  * This is really just a convenience wrapper over the more complicated
  54.  * loader API.
  55.  *
  56.  * @param path  pathname of the binary to execute
  57.  * @param argv  command-line arguments
  58.  * @return  ID of the newly created task or zero on error.
  59.  */
  60. task_id_t task_spawn(const char *path, char *const argv[])
  61. {
  62.     loader_t *ldr;
  63.     task_id_t task_id;
  64.     int rc;
  65.  
  66.     /* Spawn a program loader */   
  67.     ldr = loader_spawn();
  68.     if (ldr == NULL)
  69.         return 0;
  70.  
  71.     /* Get task ID. */
  72.     rc = loader_get_task_id(ldr, &task_id);
  73.     if (rc != EOK)
  74.         goto error;
  75.  
  76.     /* Send program pathname */
  77.     rc = loader_set_pathname(ldr, path);
  78.     if (rc != EOK)
  79.         goto error;
  80.  
  81.     /* Send arguments */
  82.     rc = loader_set_args(ldr, argv);
  83.     if (rc != EOK)
  84.         goto error;
  85.  
  86.     /* Request loader to start the program */  
  87.     rc = loader_start_program(ldr);
  88.     if (rc != EOK)
  89.         goto error;
  90.  
  91.     /* Success */
  92.     return task_id;
  93.  
  94.     /* Error exit */
  95. error:
  96.     loader_abort(ldr);
  97.     return 0;
  98. }
  99.  
  100. /** @}
  101.  */
  102.