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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.  
  43. task_id_t task_get_id(void)
  44. {
  45.     task_id_t task_id;
  46.  
  47.     (void) __SYSCALL1(SYS_TASK_GET_ID, (sysarg_t) &task_id);
  48.  
  49.     return task_id;
  50. }
  51.  
  52. /** Set the task name.
  53.  *
  54.  * @param name  The new name, typically the command used to execute the
  55.  *      program.
  56.  * @return  Zero on success or negative error code.
  57.  */
  58. int task_set_name(const char *name)
  59. {
  60.     return __SYSCALL2(SYS_TASK_SET_NAME, (sysarg_t) name, strlen(name));
  61. }
  62.  
  63. /** Create a new task by running an executable from the filesystem.
  64.  *
  65.  * This is really just a convenience wrapper over the more complicated
  66.  * loader API.
  67.  *
  68.  * @param path  pathname of the binary to execute
  69.  * @param argv  command-line arguments
  70.  * @return  ID of the newly created task or zero on error.
  71.  */
  72. task_id_t task_spawn(const char *path, char *const argv[])
  73. {
  74.     loader_t *ldr;
  75.     task_id_t task_id;
  76.     int rc;
  77.  
  78.     /* Connect to a program loader. */
  79.     ldr = loader_connect();
  80.     if (ldr == NULL)
  81.         return 0;
  82.  
  83.     /* Get task ID. */
  84.     rc = loader_get_task_id(ldr, &task_id);
  85.     if (rc != EOK)
  86.         goto error;
  87.  
  88.     /* Send program pathname. */
  89.     rc = loader_set_pathname(ldr, path);
  90.     if (rc != EOK)
  91.         goto error;
  92.  
  93.     /* Send arguments. */
  94.     rc = loader_set_args(ldr, argv);
  95.     if (rc != EOK)
  96.         goto error;
  97.  
  98.     /* Load the program. */
  99.     rc = loader_load_program(ldr);
  100.     if (rc != EOK)
  101.         goto error;
  102.  
  103.     /* Run it. */
  104.     rc = loader_run(ldr);
  105.     if (rc != EOK)
  106.         goto error;
  107.  
  108.     /* Success */
  109.  
  110.     free(ldr);
  111.     return task_id;
  112.  
  113.     /* Error exit */
  114. error:
  115.     loader_abort(ldr);
  116.     free(ldr);
  117.  
  118.     return 0;
  119. }
  120.  
  121. /** @}
  122.  */
  123.