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1175 jermar 1 
/*
2071 jermar 2 
 * Copyright (c) 2006 Jakub Jermar
3148 svoboda 3 
 * Copyright (c) 2008 Jiri Svoboda
1175 jermar 4 
 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1653 cejka 28 
 */
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1866 jermar 30 
/** @addtogroup libc
1653 cejka 31 
 * @{
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 */
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/** @file
4691 svoboda 34 
 */
1175 jermar 35 
 
36 
#include <task.h>
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#include <libc.h>
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#include <stdlib.h>
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#include <errno.h>
3474 svoboda 40 
#include <loader/loader.h>
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#include <string.h>
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#include <ipc/ns.h>
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#include <macros.h>
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#include <async.h>
1175 jermar 45 
 
1228 jermar 46 
task_id_t task_get_id(void)
1175 jermar 47 
{
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    task_id_t task_id;
1228 jermar 49 
    (void) __SYSCALL1(SYS_TASK_GET_ID, (sysarg_t) &task_id);
4691 svoboda 50 
 
1175 jermar 51 
    return task_id;
52 
}
1653 cejka 53 
 
4344 svoboda 54 
/** Set the task name.
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 *
4691 svoboda 56 
 * @param name The new name, typically the command used to execute the
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 *             program.
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 *
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 * @return Zero on success or negative error code.
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 *
4344 svoboda 61 
 */
62 
int task_set_name(const char *name)
63 
{
4348 svoboda 64 
    return __SYSCALL2(SYS_TASK_SET_NAME, (sysarg_t) name, str_size(name));
4344 svoboda 65 
}
66 
 
3474 svoboda 67 
/** Create a new task by running an executable from the filesystem.
3148 svoboda 68 
 *
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 * This is really just a convenience wrapper over the more complicated
70 
 * loader API.
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 *
4691 svoboda 72 
 * @param path pathname of the binary to execute
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 * @param argv command-line arguments
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 *
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 * @return ID of the newly created task or zero on error.
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 *
3148 svoboda 77 
 */
4691 svoboda 78 
task_id_t task_spawn(const char *path, char *const args[])
3004 svoboda 79 
{
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    /* Connect to a program loader. */
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    loader_t *ldr = loader_connect();
3474 svoboda 82 
    if (ldr == NULL)
3403 svoboda 83 
        return 0;
4691 svoboda 84 
 
3474 svoboda 85 
    /* Get task ID. */
4691 svoboda 86 
    task_id_t task_id;
87 
    int rc = loader_get_task_id(ldr, &task_id);
3403 svoboda 88 
    if (rc != EOK)
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        goto error;
4691 svoboda 90 
 
3474 svoboda 91 
    /* Send program pathname. */
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    rc = loader_set_pathname(ldr, path);
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    if (rc != EOK)
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        goto error;
4691 svoboda 95 
 
3474 svoboda 96 
    /* Send arguments. */
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    rc = loader_set_args(ldr, args);
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    if (rc != EOK)
3403 svoboda 99 
        goto error;
4691 svoboda 100 
 
101 
 
102 
    /* Send default files */
103 
    fdi_node_t *files[4];
104 
    fdi_node_t stdin_node;
105 
    fdi_node_t stdout_node;
106 
    fdi_node_t stderr_node;
107 
 
108 
    if ((stdin != NULL) && (fnode(stdin, &stdin_node) == EOK))
109 
        files[0] = &stdin_node;
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    else
111 
        files[0] = NULL;
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113 
    if ((stdout != NULL) && (fnode(stdout, &stdout_node) == EOK))
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        files[1] = &stdout_node;
115 
    else
116 
        files[1] = NULL;
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118 
    if ((stderr != NULL) && (fnode(stderr, &stderr_node) == EOK))
119 
        files[2] = &stderr_node;
120 
    else
121 
        files[2] = NULL;
122 
 
123 
    files[3] = NULL;
124 
 
125 
    rc = loader_set_files(ldr, files);
126 
    if (rc != EOK)
127 
        goto error;
128 
 
3474 svoboda 129 
    /* Load the program. */
130 
    rc = loader_load_program(ldr);
3403 svoboda 131 
    if (rc != EOK)
132 
        goto error;
4691 svoboda 133 
 
3474 svoboda 134 
    /* Run it. */
135 
    rc = loader_run(ldr);
3403 svoboda 136 
    if (rc != EOK)
137 
        goto error;
4691 svoboda 138 
 
3174 svoboda 139 
    /* Success */
3474 svoboda 140 
    free(ldr);
3448 svoboda 141 
    return task_id;
4691 svoboda 142 
 
143 
error:
3174 svoboda 144 
    /* Error exit */
3474 svoboda 145 
    loader_abort(ldr);
146 
    free(ldr);
4691 svoboda 147 
 
3174 svoboda 148 
    return 0;
3004 svoboda 149 
}
150 
 
4691 svoboda 151 
int task_wait(task_id_t id, task_exit_t *texit, int *retval)
152 
{
153 
    ipcarg_t te, rv;
154 
    int rc;
155 
 
156 
    rc = (int) async_req_2_2(PHONE_NS, NS_TASK_WAIT, LOWER32(id),
157 
        UPPER32(id), &te, &rv);
158 
    *texit = te;
159 
    *retval = rv;
160 
 
161 
    return rc;
162 
}
163 
 
164 
int task_retval(int val)
165 
{
166 
    return (int) async_req_1_0(PHONE_NS, NS_RETVAL, val);
167 
}
168 
 
1866 jermar 169 
/** @}
1653 cejka 170 
 */