1 #if defined(HAVE_CONFIG_H)
10 #include <talloc/talloc.h>
11 #include <system/system.h>
12 #include <process/process.h>
18 #define DEVICE_MOUNT_BASE (LOCAL_STATE_DIR "/petitboot/mnt")
22 struct process *process;
23 struct load_url_result *result;
25 load_url_complete async_cb;
29 const char *mount_base(void)
31 return DEVICE_MOUNT_BASE;
34 char *join_paths(void *alloc_ctx, const char *a, const char *b)
38 full_path = talloc_array(alloc_ctx, char, strlen(a) + strlen(b) + 2);
41 if (b[0] != '/' && a[strlen(a) - 1] != '/')
42 strcat(full_path, "/");
49 static char *local_name(void *ctx)
51 char *ret, tmp[] = "/tmp/pb-XXXXXX";
61 ret = talloc_strdup(ctx, tmp);
66 static void load_url_result_cleanup_local(struct load_url_result *result)
68 if (result->cleanup_local)
69 unlink(result->local);
72 static void load_url_process_exit(struct process *process)
74 struct load_task *task = process->data;
75 struct load_url_result *result;
79 pb_debug("The download client '%s' [pid %d, url %s] exited, rc %d\n",
80 process->path, process->pid, task->url->full,
81 process->exit_status);
83 result = task->result;
84 data = task->async_data;
87 if (result->status == LOAD_CANCELLED) {
88 load_url_result_cleanup_local(result);
89 } else if (process->exit_status == 0) {
90 result->status = LOAD_OK;
92 result->status = LOAD_ERROR;
93 load_url_result_cleanup_local(result);
96 /* The load callback may well free the ctx, which was the
97 * talloc parent of the task. Therefore, we want to do our cleanup
100 process_release(process);
107 static void load_process_to_local_file(struct load_task *task,
108 const char **argv, int argv_local_idx)
112 task->result->local = local_name(task->result);
113 if (!task->result->local) {
114 task->result->status = LOAD_ERROR;
117 task->result->cleanup_local = true;
120 argv[argv_local_idx] = task->result->local;
122 task->process->argv = argv;
123 task->process->path = argv[0];
126 rc = process_run_async(task->process);
128 process_release(task->process);
129 task->process = NULL;
131 task->result->status = rc ? LOAD_ERROR : LOAD_ASYNC;
133 rc = process_run_sync(task->process);
134 task->result->status = rc ? LOAD_ERROR : LOAD_OK;
135 process_release(task->process);
136 task->process = NULL;
141 * pb_load_nfs - Create a mountpoint, set the local file within that
142 * mountpoint, and run the appropriate mount command
145 static void load_nfs(struct load_task *task)
147 char *mountpoint, *opts;
149 const char *argv[] = {
150 pb_system_apps.mount,
155 NULL, /* 6: mountpoint */
159 task->result->status = LOAD_ERROR;
160 mountpoint = local_name(task->result);
163 task->result->cleanup_local = true;
164 argv[6] = mountpoint;
166 rc = pb_mkdir_recursive(mountpoint);
170 opts = talloc_strdup(NULL, "ro,nolock,nodiratime");
174 opts = talloc_asprintf_append(opts, ",port=%s",
177 task->result->local = talloc_asprintf(task->result, "%s/%s",
181 task->process->path = pb_system_apps.mount;
182 task->process->argv = argv;
185 rc = process_run_async(task->process);
187 process_release(task->process);
188 task->process = NULL;
190 task->result->status = rc ? LOAD_ERROR : LOAD_ASYNC;
192 rc = process_run_sync(task->process);
193 task->result->status = rc ? LOAD_ERROR : LOAD_OK;
194 process_release(task->process);
195 task->process = NULL;
201 static void load_sftp(struct load_task *task)
203 const char *argv[] = {
205 NULL, /* 1: host:path */
206 NULL, /* 2: local file */
210 argv[1] = talloc_asprintf(task, "%s:%s",
211 task->url->host, task->url->path);
212 load_process_to_local_file(task, argv, 2);
215 static enum tftp_type check_tftp_type(void *ctx)
217 const char *argv[] = { pb_system_apps.tftp, "-V", NULL };
218 struct process *process;
221 process = process_create(ctx);
222 process->path = pb_system_apps.tftp;
223 process->argv = argv;
224 process->keep_stdout = true;
225 process_run_sync(process);
227 if (!process->stdout_buf || process->stdout_len == 0) {
228 pb_log("Can't check TFTP client type!\n");
229 type = TFTP_TYPE_BROKEN;
231 } else if (memmem(process->stdout_buf, process->stdout_len,
232 "tftp-hpa", strlen("tftp-hpa"))) {
233 pb_debug("Found TFTP client type: tftp-hpa\n");
234 type = TFTP_TYPE_HPA;
236 } else if (memmem(process->stdout_buf, process->stdout_len,
237 "BusyBox", strlen("BusyBox"))) {
238 pb_debug("Found TFTP client type: BusyBox tftp\n");
239 type = TFTP_TYPE_BUSYBOX;
242 pb_log("Unknown TFTP client type!\n");
243 type = TFTP_TYPE_BROKEN;
246 process_release(process);
250 static void load_tftp(struct load_task *task)
252 const char *port = "69";
253 const char *argv[10] = {
258 port = task->url->port;
260 if (tftp_type == TFTP_TYPE_UNKNOWN)
261 tftp_type = check_tftp_type(task);
263 if (tftp_type == TFTP_TYPE_BUSYBOX) {
266 argv[3] = NULL; /* 3: local file */
268 argv[5] = task->url->path;
269 argv[6] = task->url->host;
273 load_process_to_local_file(task, argv, 3);
275 } else if (tftp_type == TFTP_TYPE_HPA) {
278 argv[3] = task->url->host;
282 argv[7] = task->url->path;
283 argv[8] = NULL; /* 8: local file */
285 load_process_to_local_file(task, argv, 8);
288 task->result->status = LOAD_ERROR;
293 wget_no_check_certificate = 1,
297 * pb_load_wget - Loads a remote file via wget and returns the local file path.
299 * Returns the local file path in a talloc'ed character string on success,
303 static void load_wget(struct load_task *task, int flags)
305 const char *argv[] = {
308 NULL, /* 2: local file */
317 argv[i++] = "--quiet";
319 if (flags & wget_no_check_certificate)
320 argv[i++] = "--no-check-certificate";
322 argv[i] = task->url->full;
324 load_process_to_local_file(task, argv, 2);
327 /* Although we don't need to load anything for a local path (we just return
328 * the path from the file:// URL), the other load helpers will error-out on
329 * non-existant files. So, do the same here with an access() check on the local
332 static void load_local(struct load_task *task)
336 rc = access(task->url->path, F_OK);
338 task->result->status = LOAD_ERROR;
340 task->result->local = talloc_strdup(task->result,
342 task->result->status = LOAD_OK;
347 * load_url - Loads a (possibly) remote URL and returns the local file
349 * @ctx: The talloc context to associate with the returned string.
350 * @url: The remote file URL.
351 * @tempfile: An optional variable pointer to be set when a temporary local
353 * @url_cb: An optional callback pointer if the caller wants to load url
356 * Returns the local file path in a talloc'ed character string on success,
360 struct load_url_result *load_url_async(void *ctx, struct pb_url *url,
361 load_url_complete async_cb, void *async_data)
363 struct load_url_result *result;
364 struct load_task *task;
369 task = talloc_zero(ctx, struct load_task);
371 task->async = async_cb != NULL;
372 task->result = talloc_zero(ctx, struct load_url_result);
373 task->result->task = task;
374 task->process = process_create(task);
376 task->async_cb = async_cb;
377 task->async_data = async_data;
378 task->process->exit_cb = load_url_process_exit;
379 task->process->data = task;
382 switch (url->scheme) {
388 load_wget(task, wget_no_check_certificate);
404 result = task->result;
405 if (result->status == LOAD_ERROR) {
406 load_url_result_cleanup_local(task->result);
418 struct load_url_result *load_url(void *ctx, struct pb_url *url)
420 return load_url_async(ctx, url, NULL, NULL);
423 void load_url_async_cancel(struct load_url_result *res)
425 struct load_task *task = res->task;
427 /* the completion callback may have already been called; this clears
432 if (res->status == LOAD_CANCELLED)
436 assert(task->process);
438 res->status = LOAD_CANCELLED;
439 process_stop_async(task->process);