WebSVN – HelenOS – Diff – /branches/dynload/uspace/lib/libc/generic/task.c


/*
 * Copyright (c) 2006 Jakub Jermar
 * Copyright (c) 2008 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
/** @addtogroup libc
 * @{
 */
/** @file
 */
 
#include <task.h>
#include <ipc/ipc.h>
#include <ipc/loader.h>
#include <libc.h>
#include <string.h>
#include <stdlib.h>
#include <async.h>
#include <errno.h>
 
task_id_t task_get_id(void)
{
    task_id_t task_id;
 
    (void) __SYSCALL1(SYS_TASK_GET_ID, (sysarg_t) &task_id);
 
    return task_id;
}
 
static int task_spawn_loader(void)
{
    int phone_id, rc;
 
    rc = __SYSCALL1(SYS_TASK_SPAWN_LOADER, (sysarg_t) &phone_id);
    if (rc != 0)
        return rc;
 
    return phone_id;
}
 
static int loader_set_args(int phone_id, const char *argv[])
{
    aid_t req;
    ipc_call_t answer;
    int rc;
 
    const char **ap;
    char *dp;
    char *arg_buf;
    size_t buffer_size;
    size_t len;
 
    /*
     * Serialize the arguments into a single array. First
     * compute size of the buffer needed.
     */
    ap = argv;
    buffer_size = 0;
    while (*ap != NULL) {
        buffer_size += strlen(*ap) + 1;
        ++ap;
    }
 
    arg_buf = malloc(buffer_size);
    if (arg_buf == NULL) return ENOMEM;
 
    /* Now fill the buffer with null-terminated argument strings */
    ap = argv;
    dp = arg_buf;
    while (*ap != NULL) {
        strcpy(dp, *ap);
        dp += strlen(*ap) + 1;
 
        ++ap;
    }
 
    /* Send serialized arguments to the loader */
 
    req = async_send_0(phone_id, LOADER_SET_ARGS, &answer);
    rc = ipc_data_write_start(phone_id, (void *)arg_buf, buffer_size);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        return rc;
    }
 
    async_wait_for(req, &rc);
    if (rc != EOK) return rc;
 
    /* Free temporary buffer */
    free(arg_buf);
 
    return EOK;
}
 
/** Create a new task by running an executable from VFS.
 *
 * @param path  pathname of the binary to execute
 * @param argv  command-line arguments
 * @return  ID of the newly created task or zero on error.
 */
task_id_t task_spawn(const char *path, const char *argv[])
{
    int phone_id;
    ipc_call_t answer;
    aid_t req;
    int rc;
 
    /* Spawn a program loader */   
    phone_id = task_spawn_loader();
    if (phone_id < 0) return 0;
 
    /*
     * Say hello so that the loader knows the incoming connection's
     * phone hash.
     */
    rc = async_req_0_0(phone_id, LOADER_HELLO);
    if (rc != EOK) return 0;
 
    /* Send program pathname */
    req = async_send_0(phone_id, LOADER_SET_PATHNAME, &answer);
    rc = ipc_data_write_start(phone_id, (void *)path, strlen(path));
    if (rc != EOK) {
        async_wait_for(req, NULL);
        return 1;
    }
 
    async_wait_for(req, &rc);
    if (rc != EOK) goto error;
 
    /* Send arguments */
    rc = loader_set_args(phone_id, argv);
    if (rc != EOK) goto error;
 
    /* Request loader to start the program */  
    rc = async_req_0_0(phone_id, LOADER_RUN);
    if (rc != EOK) goto error;
 
    /* Success */
    ipc_hangup(phone_id);
    return 1;
 
    /* Error exit */
error:
    ipc_hangup(phone_id);
    return 0;
}
 
 
 
 
 
 
/** @}
 */
 

Rev 3174	Rev 3190
1	/*	1	/*
2	* Copyright (c) 2006 Jakub Jermar	2	* Copyright (c) 2006 Jakub Jermar
3	* Copyright (c) 2008 Jiri Svoboda	3	* Copyright (c) 2008 Jiri Svoboda
4	* All rights reserved.	4	* All rights reserved.
5	*	5	*
6	* Redistribution and use in source and binary forms, with or without	6	* Redistribution and use in source and binary forms, with or without
7	* modification, are permitted provided that the following conditions	7	* modification, are permitted provided that the following conditions
8	* are met:	8	* are met:
9	*	9	*
10	* - Redistributions of source code must retain the above copyright	10	* - Redistributions of source code must retain the above copyright
11	* notice, this list of conditions and the following disclaimer.	11	* notice, this list of conditions and the following disclaimer.
12	* - Redistributions in binary form must reproduce the above copyright	12	* - Redistributions in binary form must reproduce the above copyright
13	* notice, this list of conditions and the following disclaimer in the	13	* notice, this list of conditions and the following disclaimer in the
14	* documentation and/or other materials provided with the distribution.	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	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.	16	* derived from this software without specific prior written permission.
17	*	17	*
18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	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	19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	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	24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	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	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.	27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	28	*/
29		29
30	/** @addtogroup libc	30	/** @addtogroup libc
31	* @{	31	* @{
32	*/	32	*/
33	/** @file	33	/** @file
34	*/	34	*/
35		35
36	#include <task.h>	36	#include <task.h>
37	#include <ipc/ipc.h>	37	#include <ipc/ipc.h>
38	#include <ipc/loader.h>	38	#include <ipc/loader.h>
39	#include <libc.h>	39	#include <libc.h>
40	#include <string.h>	40	#include <string.h>
41	#include <stdlib.h>	41	#include <stdlib.h>
42	#include <async.h>	42	#include <async.h>
43	#include <errno.h>	43	#include <errno.h>
44		44
45	task_id_t task_get_id(void)	45	task_id_t task_get_id(void)
46	{	46	{
47	task_id_t task_id;	47	task_id_t task_id;
48		48
49	(void) __SYSCALL1(SYS_TASK_GET_ID, (sysarg_t) &task_id);	49	(void) __SYSCALL1(SYS_TASK_GET_ID, (sysarg_t) &task_id);
50		50
51	return task_id;	51	return task_id;
52	}	52	}
53		53
54	static int task_spawn_loader(void)	54	static int task_spawn_loader(void)
55	{	55	{
56	int phone_id, rc;	56	int phone_id, rc;
57		57
58	rc = __SYSCALL1(SYS_TASK_SPAWN_LOADER, (sysarg_t) &phone_id);	58	rc = __SYSCALL1(SYS_TASK_SPAWN_LOADER, (sysarg_t) &phone_id);
59	if (rc != 0)	59	if (rc != 0)
60	return rc;	60	return rc;
61		61
62	return phone_id;	62	return phone_id;
63	}	63	}
64		64
65	static int loader_set_args(int phone_id, const char *argv[])	65	static int loader_set_args(int phone_id, const char *argv[])
66	{	66	{
67	aid_t req;	67	aid_t req;
68	ipc_call_t answer;	68	ipc_call_t answer;
69	int rc;	69	int rc;
70		70
71	const char **ap;	71	const char **ap;
72	char *dp;	72	char *dp;
73	char *arg_buf;	73	char *arg_buf;
74	size_t buffer_size;	74	size_t buffer_size;
75	size_t len;	75	size_t len;
76		76
77	/*	77	/*
78	* Serialize the arguments into a single array. First	78	* Serialize the arguments into a single array. First
79	* compute size of the buffer needed.	79	* compute size of the buffer needed.
80	*/	80	*/
81	ap = argv;	81	ap = argv;
82	buffer_size = 0;	82	buffer_size = 0;
83	while (*ap != NULL) {	83	while (*ap != NULL) {
84	buffer_size += strlen(*ap) + 1;	84	buffer_size += strlen(*ap) + 1;
85	++ap;	85	++ap;
86	}	86	}
87		87
88	arg_buf = malloc(buffer_size);	88	arg_buf = malloc(buffer_size);
89	if (arg_buf == NULL) return ENOMEM;	89	if (arg_buf == NULL) return ENOMEM;
90		90
91	/* Now fill the buffer with null-terminated argument strings */	91	/* Now fill the buffer with null-terminated argument strings */
92	ap = argv;	92	ap = argv;
93	dp = arg_buf;	93	dp = arg_buf;
94	while (*ap != NULL) {	94	while (*ap != NULL) {
95	strcpy(dp, *ap);	95	strcpy(dp, *ap);
96	dp += strlen(*ap) + 1;	96	dp += strlen(*ap) + 1;
97		97
98	++ap;	98	++ap;
99	}	99	}
100		100
101	/* Send serialized arguments to the loader */	101	/* Send serialized arguments to the loader */
102		102
103	req = async_send_0(phone_id, LOADER_SET_ARGS, &answer);	103	req = async_send_0(phone_id, LOADER_SET_ARGS, &answer);
104	rc = ipc_data_write_start(phone_id, (void *)arg_buf, buffer_size);	104	rc = ipc_data_write_start(phone_id, (void *)arg_buf, buffer_size);
105	if (rc != EOK) {	105	if (rc != EOK) {
106	async_wait_for(req, NULL);	106	async_wait_for(req, NULL);
107	return rc;	107	return rc;
108	}	108	}
109		109
110	async_wait_for(req, &rc);	110	async_wait_for(req, &rc);
111	if (rc != EOK) return rc;	111	if (rc != EOK) return rc;
112		112
113	/* Free temporary buffer */	113	/* Free temporary buffer */
114	free(arg_buf);	114	free(arg_buf);
115		115
116	return EOK;	116	return EOK;
117	}	117	}
118		118
119	/** Create a new task by running an executable from VFS.	119	/** Create a new task by running an executable from VFS.
120	*	120	*
121	* @param path pathname of the binary to execute	121	* @param path pathname of the binary to execute
122	* @param argv command-line arguments	122	* @param argv command-line arguments
123	* @return ID of the newly created task or zero on error.	123	* @return ID of the newly created task or zero on error.
124	*/	124	*/
125	task_id_t task_spawn_ex(const char path, const char argv[])	125	task_id_t task_spawn(const char path, const char argv[])
126	{	126	{
127	int phone_id;	127	int phone_id;
128	ipc_call_t answer;	128	ipc_call_t answer;
129	aid_t req;	129	aid_t req;
130	int rc;	130	int rc;
131		131
132	/* Spawn a program loader */	132	/* Spawn a program loader */
133	phone_id = task_spawn_loader();	133	phone_id = task_spawn_loader();
134	if (phone_id < 0) return 0;	134	if (phone_id < 0) return 0;
135		135
136	/*	136	/*
137	* Say hello so that the loader knows the incoming connection's	137	* Say hello so that the loader knows the incoming connection's
138	* phone hash.	138	* phone hash.
139	*/	139	*/
140	rc = async_req_0_0(phone_id, LOADER_HELLO);	140	rc = async_req_0_0(phone_id, LOADER_HELLO);
141	if (rc != EOK) return 0;	141	if (rc != EOK) return 0;
142		142
143	/* Send program pathname */	143	/* Send program pathname */
144	req = async_send_0(phone_id, LOADER_SET_PATHNAME, &answer);	144	req = async_send_0(phone_id, LOADER_SET_PATHNAME, &answer);
145	rc = ipc_data_write_start(phone_id, (void *)path, strlen(path));	145	rc = ipc_data_write_start(phone_id, (void *)path, strlen(path));
146	if (rc != EOK) {	146	if (rc != EOK) {
147	async_wait_for(req, NULL);	147	async_wait_for(req, NULL);
148	return 1;	148	return 1;
149	}	149	}
150		150
151	async_wait_for(req, &rc);	151	async_wait_for(req, &rc);
152	if (rc != EOK) goto error;	152	if (rc != EOK) goto error;
153		153
154	/* Send arguments */	154	/* Send arguments */
155	rc = loader_set_args(phone_id, argv);	155	rc = loader_set_args(phone_id, argv);
156	if (rc != EOK) goto error;	156	if (rc != EOK) goto error;
157		157
158	/* Request loader to start the program */	158	/* Request loader to start the program */
159	rc = async_req_0_0(phone_id, LOADER_RUN);	159	rc = async_req_0_0(phone_id, LOADER_RUN);
160	if (rc != EOK) goto error;	160	if (rc != EOK) goto error;
161		161
162	/* Success */	162	/* Success */
163	ipc_hangup(phone_id);	163	ipc_hangup(phone_id);
164	return 1;	164	return 1;
165		165
166	/* Error exit */	166	/* Error exit */
167	error:	167	error:
168	ipc_hangup(phone_id);	168	ipc_hangup(phone_id);
169	return 0;	169	return 0;
170	}	170	}
171		-
172	int task_spawn(void *image, size_t size)	-
173	{	-
174	return __SYSCALL2(SYS_TASK_SPAWN, (sysarg_t) image, (sysarg_t) size);	-
175	}	-
176		171
177	/** @}	172	/** @}
178	*/	173	*/
179		174

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(root)/branches/dynload/uspace/lib/libc/generic/task.c – Rev 3174 → 3190