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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1175 | jermar | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2006 Jakub Jermar |
| 3222 | svoboda | 3 | * Copyright (c) 2008 Jiri Svoboda |
| 1175 | jermar | 4 | * All rights reserved. |
| 5 | * |
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| 6 | * Redistribution and use in source and binary forms, with or without |
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| 7 | * modification, are permitted provided that the following conditions |
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| 8 | * are met: |
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| 9 | * |
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| 10 | * - Redistributions of source code must retain the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer. |
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| 12 | * - Redistributions in binary form must reproduce the above copyright |
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| 13 | * notice, this list of conditions and the following disclaimer in the |
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| 14 | * documentation and/or other materials provided with the distribution. |
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| 15 | * - The name of the author may not be used to endorse or promote products |
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| 16 | * derived from this software without specific prior written permission. |
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| 17 | * |
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| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 1653 | cejka | 28 | */ |
| 29 | |||
| 1866 | jermar | 30 | /** @addtogroup libc |
| 1653 | cejka | 31 | * @{ |
| 32 | */ |
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| 33 | /** @file |
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| 1175 | jermar | 34 | */ |
| 35 | |||
| 36 | #include <task.h> |
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| 3222 | svoboda | 37 | #include <ipc/ipc.h> |
| 38 | #include <ipc/loader.h> |
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| 1175 | jermar | 39 | #include <libc.h> |
| 3222 | svoboda | 40 | #include <string.h> |
| 41 | #include <stdlib.h> |
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| 42 | #include <async.h> |
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| 43 | #include <errno.h> |
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| 3306 | jermar | 44 | #include <vfs/vfs.h> |
| 1175 | jermar | 45 | |
| 1228 | jermar | 46 | task_id_t task_get_id(void) |
| 1175 | jermar | 47 | { |
| 48 | task_id_t task_id; |
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| 49 | |||
| 1228 | jermar | 50 | (void) __SYSCALL1(SYS_TASK_GET_ID, (sysarg_t) &task_id); |
| 1175 | jermar | 51 | |
| 52 | return task_id; |
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| 53 | } |
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| 1653 | cejka | 54 | |
| 3222 | svoboda | 55 | static int task_spawn_loader(void) |
| 3073 | decky | 56 | { |
| 3222 | svoboda | 57 | int phone_id, rc; |
| 58 | |||
| 59 | rc = __SYSCALL1(SYS_PROGRAM_SPAWN_LOADER, (sysarg_t) &phone_id); |
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| 60 | if (rc != 0) |
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| 61 | return rc; |
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| 62 | |||
| 63 | return phone_id; |
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| 3073 | decky | 64 | } |
| 65 | |||
| 3222 | svoboda | 66 | static int loader_set_args(int phone_id, const char *argv[]) |
| 67 | { |
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| 68 | aid_t req; |
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| 69 | ipc_call_t answer; |
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| 70 | ipcarg_t rc; |
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| 71 | |||
| 72 | const char **ap; |
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| 73 | char *dp; |
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| 74 | char *arg_buf; |
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| 75 | size_t buffer_size; |
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| 76 | size_t len; |
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| 77 | |||
| 78 | /* |
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| 79 | * Serialize the arguments into a single array. First |
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| 80 | * compute size of the buffer needed. |
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| 81 | */ |
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| 82 | ap = argv; |
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| 83 | buffer_size = 0; |
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| 84 | while (*ap != NULL) { |
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| 85 | buffer_size += strlen(*ap) + 1; |
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| 86 | ++ap; |
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| 87 | } |
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| 88 | |||
| 89 | arg_buf = malloc(buffer_size); |
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| 90 | if (arg_buf == NULL) return ENOMEM; |
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| 91 | |||
| 92 | /* Now fill the buffer with null-terminated argument strings */ |
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| 93 | ap = argv; |
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| 94 | dp = arg_buf; |
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| 95 | while (*ap != NULL) { |
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| 96 | strcpy(dp, *ap); |
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| 97 | dp += strlen(*ap) + 1; |
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| 98 | |||
| 99 | ++ap; |
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| 100 | } |
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| 101 | |||
| 102 | /* Send serialized arguments to the loader */ |
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| 103 | |||
| 104 | req = async_send_0(phone_id, LOADER_SET_ARGS, &answer); |
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| 105 | rc = ipc_data_write_start(phone_id, (void *)arg_buf, buffer_size); |
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| 106 | if (rc != EOK) { |
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| 107 | async_wait_for(req, NULL); |
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| 108 | return rc; |
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| 109 | } |
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| 110 | |||
| 111 | async_wait_for(req, &rc); |
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| 112 | if (rc != EOK) return rc; |
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| 113 | |||
| 114 | /* Free temporary buffer */ |
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| 115 | free(arg_buf); |
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| 116 | |||
| 117 | return EOK; |
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| 118 | } |
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| 119 | |||
| 120 | /** Create a new task by running an executable from VFS. |
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| 121 | * |
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| 122 | * @param path pathname of the binary to execute |
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| 123 | * @param argv command-line arguments |
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| 124 | * @return ID of the newly created task or zero on error. |
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| 125 | */ |
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| 3462 | svoboda | 126 | task_id_t task_spawn(const char *path, char *const argv[]) |
| 3222 | svoboda | 127 | { |
| 128 | int phone_id; |
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| 129 | ipc_call_t answer; |
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| 130 | aid_t req; |
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| 131 | int rc; |
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| 132 | ipcarg_t retval; |
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| 133 | |||
| 3306 | jermar | 134 | char *pa; |
| 135 | size_t pa_len; |
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| 3447 | svoboda | 136 | task_id_t task_id; |
| 3306 | jermar | 137 | |
| 138 | pa = absolutize(path, &pa_len); |
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| 139 | if (!pa) |
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| 140 | return 0; |
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| 141 | |||
| 3222 | svoboda | 142 | /* Spawn a program loader */ |
| 143 | phone_id = task_spawn_loader(); |
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| 3306 | jermar | 144 | if (phone_id < 0) |
| 145 | return 0; |
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| 3222 | svoboda | 146 | |
| 147 | /* |
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| 148 | * Say hello so that the loader knows the incoming connection's |
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| 149 | * phone hash. |
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| 150 | */ |
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| 151 | rc = async_req_0_0(phone_id, LOADER_HELLO); |
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| 3306 | jermar | 152 | if (rc != EOK) |
| 153 | return 0; |
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| 3222 | svoboda | 154 | |
| 3447 | svoboda | 155 | /* Get task ID. */ |
| 156 | req = async_send_0(phone_id, LOADER_GET_TASKID, &answer); |
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| 157 | rc = ipc_data_read_start(phone_id, &task_id, sizeof(task_id)); |
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| 158 | if (rc != EOK) { |
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| 159 | async_wait_for(req, NULL); |
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| 160 | goto error; |
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| 161 | } |
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| 162 | |||
| 163 | async_wait_for(req, &retval); |
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| 164 | if (retval != EOK) |
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| 165 | goto error; |
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| 166 | |||
| 3222 | svoboda | 167 | /* Send program pathname */ |
| 168 | req = async_send_0(phone_id, LOADER_SET_PATHNAME, &answer); |
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| 3306 | jermar | 169 | rc = ipc_data_write_start(phone_id, (void *)pa, pa_len); |
| 3222 | svoboda | 170 | if (rc != EOK) { |
| 171 | async_wait_for(req, NULL); |
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| 172 | return 1; |
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| 173 | } |
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| 174 | |||
| 175 | async_wait_for(req, &retval); |
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| 3306 | jermar | 176 | if (retval != EOK) |
| 177 | goto error; |
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| 3222 | svoboda | 178 | |
| 179 | /* Send arguments */ |
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| 180 | rc = loader_set_args(phone_id, argv); |
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| 3306 | jermar | 181 | if (rc != EOK) |
| 182 | goto error; |
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| 3222 | svoboda | 183 | |
| 184 | /* Request loader to start the program */ |
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| 185 | rc = async_req_0_0(phone_id, LOADER_RUN); |
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| 3306 | jermar | 186 | if (rc != EOK) |
| 187 | goto error; |
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| 3222 | svoboda | 188 | |
| 189 | /* Success */ |
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| 190 | ipc_hangup(phone_id); |
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| 3447 | svoboda | 191 | return task_id; |
| 3222 | svoboda | 192 | |
| 193 | /* Error exit */ |
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| 194 | error: |
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| 195 | ipc_hangup(phone_id); |
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| 196 | return 0; |
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| 197 | } |
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| 198 | |||
| 1866 | jermar | 199 | /** @} |
| 1653 | cejka | 200 | */ |