Subversion Repositories HelenOS

Rev

Rev 4327 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
3469 svoboda 1
/*
2
 * Copyright (c) 2008 Jiri Svoboda
3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
29
/** @addtogroup libc
30
 * @{
31
 */
32
/** @file
4581 mejdrech 33
 */
3469 svoboda 34
 
35
#include <ipc/ipc.h>
36
#include <ipc/loader.h>
3896 svoboda 37
#include <ipc/services.h>
3469 svoboda 38
#include <libc.h>
3475 svoboda 39
#include <task.h>
3469 svoboda 40
#include <string.h>
41
#include <stdlib.h>
42
#include <async.h>
43
#include <errno.h>
44
#include <vfs/vfs.h>
45
#include <loader/loader.h>
46
 
47
/** Connect to a new program loader.
48
 *
49
 * Spawns a new program loader task and returns the connection structure.
4581 mejdrech 50
 *
51
 * @param name Symbolic name to set on the newly created task.
52
 *
53
 * @return Pointer to the loader connection structure (should be
54
 *         deallocated using free() after use).
55
 *
3469 svoboda 56
 */
3896 svoboda 57
int loader_spawn(const char *name)
3469 svoboda 58
{
3896 svoboda 59
    return __SYSCALL2(SYS_PROGRAM_SPAWN_LOADER,
4263 mejdrech 60
        (sysarg_t) name, str_size(name));
3896 svoboda 61
}
62
 
63
loader_t *loader_connect(void)
64
{
4581 mejdrech 65
    int phone_id = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_LOAD, 0, 0);
3896 svoboda 66
    if (phone_id < 0)
3469 svoboda 67
        return NULL;
4581 mejdrech 68
 
69
    loader_t *ldr = malloc(sizeof(loader_t));
3469 svoboda 70
    if (ldr == NULL)
71
        return NULL;
4581 mejdrech 72
 
3469 svoboda 73
    ldr->phone_id = phone_id;
4581 mejdrech 74
    return ldr;
3469 svoboda 75
}
76
 
77
/** Get ID of the new task.
78
 *
79
 * Retrieves the ID of the new task from the loader.
80
 *
4581 mejdrech 81
 * @param ldr     Loader connection structure.
82
 * @param task_id Points to a variable where the ID should be stored.
83
 *
84
 * @return Zero on success or negative error code.
85
 *
3469 svoboda 86
 */
87
int loader_get_task_id(loader_t *ldr, task_id_t *task_id)
88
{
4581 mejdrech 89
    /* Get task ID. */
3469 svoboda 90
    ipc_call_t answer;
4581 mejdrech 91
    aid_t req = async_send_0(ldr->phone_id, LOADER_GET_TASKID, &answer);
92
    int rc = ipc_data_read_start(ldr->phone_id, task_id, sizeof(task_id_t));
3469 svoboda 93
    if (rc != EOK) {
94
        async_wait_for(req, NULL);
95
        return rc;
96
    }
4581 mejdrech 97
 
98
    ipcarg_t retval;
3469 svoboda 99
    async_wait_for(req, &retval);
4581 mejdrech 100
    return (int) retval;
3469 svoboda 101
}
102
 
103
/** Set pathname of the program to load.
104
 *
105
 * Sets the name of the program file to load. The name can be relative
106
 * to the current working directory (it will be absolutized before
107
 * sending to the loader).
108
 *
4581 mejdrech 109
 * @param ldr  Loader connection structure.
110
 * @param path Pathname of the program file.
111
 *
112
 * @return Zero on success or negative error code.
113
 *
3469 svoboda 114
 */
115
int loader_set_pathname(loader_t *ldr, const char *path)
116
{
117
    size_t pa_len;
4581 mejdrech 118
    char *pa = absolutize(path, &pa_len);
3469 svoboda 119
    if (!pa)
120
        return 0;
4581 mejdrech 121
 
3469 svoboda 122
    /* Send program pathname */
4581 mejdrech 123
    ipc_call_t answer;
124
    aid_t req = async_send_0(ldr->phone_id, LOADER_SET_PATHNAME, &answer);
125
    int rc = ipc_data_write_start(ldr->phone_id, (void *) pa, pa_len);
3469 svoboda 126
    if (rc != EOK) {
127
        async_wait_for(req, NULL);
128
        return rc;
129
    }
4581 mejdrech 130
 
3469 svoboda 131
    free(pa);
4581 mejdrech 132
 
133
    ipcarg_t retval;
3469 svoboda 134
    async_wait_for(req, &retval);
4581 mejdrech 135
    return (int) retval;
3469 svoboda 136
}
137
 
138
/** Set command-line arguments for the program.
139
 *
140
 * Sets the vector of command-line arguments to be passed to the loaded
141
 * program. By convention, the very first argument is typically the same as
142
 * the command used to execute the program.
143
 *
4581 mejdrech 144
 * @param ldr  Loader connection structure.
145
 * @param argv NULL-terminated array of pointers to arguments.
146
 *
147
 * @return Zero on success or negative error code.
148
 *
3469 svoboda 149
 */
150
int loader_set_args(loader_t *ldr, char *const argv[])
151
{
4581 mejdrech 152
    /*
3469 svoboda 153
     * Serialize the arguments into a single array. First
154
     * compute size of the buffer needed.
155
     */
4581 mejdrech 156
    char *const *ap = argv;
157
    size_t buffer_size = 0;
3469 svoboda 158
    while (*ap != NULL) {
4263 mejdrech 159
        buffer_size += str_size(*ap) + 1;
4581 mejdrech 160
        ap++;
3469 svoboda 161
    }
4581 mejdrech 162
 
163
    char *arg_buf = malloc(buffer_size);
164
    if (arg_buf == NULL)
165
        return ENOMEM;
166
 
3469 svoboda 167
    /* Now fill the buffer with null-terminated argument strings */
168
    ap = argv;
4581 mejdrech 169
    char *dp = arg_buf;
170
 
3469 svoboda 171
    while (*ap != NULL) {
4327 mejdrech 172
        str_cpy(dp, buffer_size - (dp - arg_buf), *ap);
4263 mejdrech 173
        dp += str_size(*ap) + 1;
4581 mejdrech 174
        ap++;
3469 svoboda 175
    }
4581 mejdrech 176
 
3469 svoboda 177
    /* Send serialized arguments to the loader */
4581 mejdrech 178
    ipc_call_t answer;
179
    aid_t req = async_send_0(ldr->phone_id, LOADER_SET_ARGS, &answer);
180
    ipcarg_t rc = ipc_data_write_start(ldr->phone_id, (void *) arg_buf, buffer_size);
3469 svoboda 181
    if (rc != EOK) {
182
        async_wait_for(req, NULL);
183
        return rc;
184
    }
4581 mejdrech 185
 
3469 svoboda 186
    async_wait_for(req, &rc);
4581 mejdrech 187
    if (rc != EOK)
188
        return rc;
189
 
3469 svoboda 190
    /* Free temporary buffer */
191
    free(arg_buf);
4581 mejdrech 192
 
193
    return EOK;
194
}
3469 svoboda 195
 
4581 mejdrech 196
/** Set preset files for the program.
197
 *
198
 * Sets the vector of preset files to be passed to the loaded
199
 * program. By convention, the first three files represent stdin,
200
 * stdout and stderr respectively.
201
 *
202
 * @param ldr   Loader connection structure.
203
 * @param files NULL-terminated array of pointers to files.
204
 *
205
 * @return Zero on success or negative error code.
206
 *
207
 */
208
int loader_set_files(loader_t *ldr, fdi_node_t *const files[])
209
{
210
    /*
211
     * Serialize the arguments into a single array. First
212
     * compute size of the buffer needed.
213
     */
214
    fdi_node_t *const *ap = files;
215
    size_t count = 0;
216
    while (*ap != NULL) {
217
        count++;
218
        ap++;
219
    }
220
 
221
    fdi_node_t *files_buf;
222
    files_buf = (fdi_node_t *) malloc(count * sizeof(fdi_node_t));
223
    if (files_buf == NULL)
224
        return ENOMEM;
225
 
226
    /* Fill the buffer */
227
    size_t i;
228
    for (i = 0; i < count; i++)
229
        files_buf[i] = *files[i];
230
 
231
    /* Send serialized files to the loader */
232
    ipc_call_t answer;
233
    aid_t req = async_send_0(ldr->phone_id, LOADER_SET_FILES, &answer);
234
    ipcarg_t rc = ipc_data_write_start(ldr->phone_id, (void *) files_buf,
235
        count * sizeof(fdi_node_t));
236
    if (rc != EOK) {
237
        async_wait_for(req, NULL);
238
        return rc;
239
    }
240
 
241
    async_wait_for(req, &rc);
242
    if (rc != EOK)
243
        return rc;
244
 
245
    /* Free temporary buffer */
246
    free(files_buf);
247
 
3469 svoboda 248
    return EOK;
249
}
250
 
3470 svoboda 251
/** Instruct loader to load the program.
252
 *
253
 * If this function succeeds, the program has been successfully loaded
254
 * and is ready to be executed.
255
 *
4581 mejdrech 256
 * @param ldr Loader connection structure.
257
 *
258
 * @return Zero on success or negative error code.
259
 *
3470 svoboda 260
 */
261
int loader_load_program(loader_t *ldr)
262
{
4581 mejdrech 263
    return (int) async_req_0_0(ldr->phone_id, LOADER_LOAD);
3470 svoboda 264
}
265
 
3469 svoboda 266
/** Instruct loader to execute the program.
267
 *
3470 svoboda 268
 * Note that this function blocks until the loader actually replies
269
 * so you cannot expect this function to return if you are debugging
270
 * the task and its thread is stopped.
271
 *
3469 svoboda 272
 * After using this function, no further operations must be performed
273
 * on the loader structure. It should be de-allocated using free().
274
 *
4581 mejdrech 275
 * @param ldr Loader connection structure.
276
 *
277
 * @return Zero on success or negative error code.
278
 *
3469 svoboda 279
 */
3470 svoboda 280
int loader_run(loader_t *ldr)
3469 svoboda 281
{
4581 mejdrech 282
    int rc = async_req_0_0(ldr->phone_id, LOADER_RUN);
3469 svoboda 283
    if (rc != EOK)
284
        return rc;
4581 mejdrech 285
 
4263 mejdrech 286
    ipc_hangup(ldr->phone_id);
287
    ldr->phone_id = 0;
3469 svoboda 288
    return EOK;
289
}
290
 
291
/** Cancel the loader session.
292
 *
293
 * Tells the loader not to load any program and terminate.
294
 * After using this function, no further operations must be performed
295
 * on the loader structure. It should be de-allocated using free().
296
 *
4581 mejdrech 297
 * @param ldr Loader connection structure.
298
 *
299
 * @return Zero on success or negative error code.
300
 *
3469 svoboda 301
 */
302
void loader_abort(loader_t *ldr)
303
{
304
    ipc_hangup(ldr->phone_id);
305
    ldr->phone_id = 0;
306
}
307
 
308
/** @}
309
 */