file.c

   1 /*
   2  * rpcd - UBUS RPC server
   3  *
   4  *   Copyright (C) 2013-2014 Jo-Philipp Wich <jow@openwrt.org>
   5  *   Copyright (C) 2016 Luka Perkov <luka@openwrt.org>
   6  *
   7  * Permission to use, copy, modify, and/or distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 #include <fcntl.h>
  21 #include <errno.h>
  22 #include <unistd.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <limits.h>
  26 #include <dirent.h>
  27 #include <sys/stat.h>
  28 #include <sys/wait.h>
  29 #include <libubus.h>
  30 #include <libubox/blobmsg.h>
  31 #include <libubox/md5.h>
  32 #include <libubox/ustream.h>
  33 #include <libubox/utils.h>
  34
  35 #include <rpcd/plugin.h>
  36
  37 /* limit of sys & proc files */
  38 #define RPC_FILE_MIN_SIZE               (128)
  39
  40 /* limit of regular files and command output data */
  41 #define RPC_FILE_MAX_SIZE               (4096 * 64)
  42
  43 #define ustream_for_each_read_buffer(stream, ptr, len) \
  44         for (ptr = ustream_get_read_buf(stream, &len);     \
  45              ptr != NULL && len > 0;                       \
  46              ustream_consume(stream, len), ptr = ustream_get_read_buf(stream, &len))
  47
  48 #define ustream_declare(us, fd, name)                     \
  49         us.stream.string_data   = true;                       \
  50         us.stream.r.buffer_len  = 4096;                       \
  51         us.stream.r.max_buffers = RPC_FILE_MAX_SIZE / 4096;   \
  52         us.stream.notify_read   = rpc_file_##name##_read_cb;  \
  53         us.stream.notify_state  = rpc_file_##name##_state_cb; \
  54         ustream_fd_init(&us, fd);
  55
  56 static const struct rpc_daemon_ops *ops;
  57
  58 struct rpc_file_exec_context {
  59         struct ubus_context *context;
  60         struct ubus_request_data request;
  61         struct uloop_timeout timeout;
  62         struct uloop_process process;
  63         struct ustream_fd opipe;
  64         struct ustream_fd epipe;
  65         int outlen;
  66         char *out;
  67         int errlen;
  68         char *err;
  69         int stat;
  70 };
  71
  72
  73 static struct blob_buf buf;
  74
  75 enum {
  76         RPC_F_R_PATH,
  77         __RPC_F_R_MAX,
  78 };
  79
  80 static const struct blobmsg_policy rpc_file_r_policy[__RPC_F_R_MAX] = {
  81         [RPC_F_R_PATH] = { .name = "path", .type = BLOBMSG_TYPE_STRING },
  82 };
  83
  84 enum {
  85         RPC_F_RB_PATH,
  86         RPC_F_RB_BASE64,
  87         __RPC_F_RB_MAX,
  88 };
  89
  90 static const struct blobmsg_policy rpc_file_rb_policy[__RPC_F_RB_MAX] = {
  91         [RPC_F_RB_PATH]   = { .name = "path",   .type = BLOBMSG_TYPE_STRING },
  92         [RPC_F_RB_BASE64] = { .name = "base64", .type = BLOBMSG_TYPE_BOOL   },
  93 };
  94
  95 enum {
  96         RPC_F_RW_PATH,
  97         RPC_F_RW_DATA,
  98         RPC_F_RW_APPEND,
  99         RPC_F_RW_MODE,
 100         RPC_F_RW_BASE64,
 101         __RPC_F_RW_MAX,
 102 };
 103
 104 static const struct blobmsg_policy rpc_file_rw_policy[__RPC_F_RW_MAX] = {
 105         [RPC_F_RW_PATH]   = { .name = "path",   .type = BLOBMSG_TYPE_STRING },
 106         [RPC_F_RW_DATA]   = { .name = "data",   .type = BLOBMSG_TYPE_STRING },
 107         [RPC_F_RW_APPEND] = { .name = "append", .type = BLOBMSG_TYPE_BOOL  },
 108         [RPC_F_RW_MODE]   = { .name = "mode",   .type = BLOBMSG_TYPE_INT32  },
 109         [RPC_F_RW_BASE64] = { .name = "base64", .type = BLOBMSG_TYPE_BOOL   },
 110 };
 111
 112 enum {
 113         RPC_E_CMD,
 114         RPC_E_PARM,
 115         RPC_E_ENV,
 116         __RPC_E_MAX,
 117 };
 118
 119 static const struct blobmsg_policy rpc_exec_policy[__RPC_E_MAX] = {
 120         [RPC_E_CMD]  = { .name = "command", .type = BLOBMSG_TYPE_STRING },
 121         [RPC_E_PARM] = { .name = "params",  .type = BLOBMSG_TYPE_ARRAY  },
 122         [RPC_E_ENV]  = { .name = "env",     .type = BLOBMSG_TYPE_TABLE  },
 123 };
 124
 125 static const char *d_types[] = {
 126         [DT_BLK]     = "block",
 127         [DT_CHR]     = "char",
 128         [DT_DIR]     = "directory",
 129         [DT_FIFO]    = "fifo",
 130         [DT_LNK]     = "symlink",
 131         [DT_REG]     = "file",
 132         [DT_SOCK]    = "socket",
 133         [DT_UNKNOWN] = "unknown",
 134 };
 135
 136
 137 static int
 138 rpc_errno_status(void)
 139 {
 140         switch (errno)
 141         {
 142         case EACCES:
 143                 return UBUS_STATUS_PERMISSION_DENIED;
 144
 145         case ENOTDIR:
 146                 return UBUS_STATUS_INVALID_ARGUMENT;
 147
 148         case ENOENT:
 149                 return UBUS_STATUS_NOT_FOUND;
 150
 151         case EINVAL:
 152                 return UBUS_STATUS_INVALID_ARGUMENT;
 153
 154         default:
 155                 return UBUS_STATUS_UNKNOWN_ERROR;
 156         }
 157 }
 158
 159 static struct blob_attr **
 160 rpc_check_path(struct blob_attr *msg, char **path, struct stat *s)
 161 {
 162         static struct blob_attr *tb[__RPC_F_R_MAX];
 163
 164         blobmsg_parse(rpc_file_r_policy, __RPC_F_R_MAX, tb, blob_data(msg), blob_len(msg));
 165
 166         if (!tb[RPC_F_R_PATH])
 167         {
 168                 errno = EINVAL;
 169                 return NULL;
 170         }
 171
 172         *path = blobmsg_data(tb[RPC_F_R_PATH]);
 173
 174         if (stat(*path, s))
 175                 return NULL;
 176
 177         return tb;
 178 }
 179
 180 static int
 181 rpc_file_read(struct ubus_context *ctx, struct ubus_object *obj,
 182               struct ubus_request_data *req, const char *method,
 183               struct blob_attr *msg)
 184 {
 185         static struct blob_attr *tb[__RPC_F_RB_MAX];
 186         bool base64 = false;
 187         int fd, rv;
 188         ssize_t len;
 189         char *path;
 190         struct stat s;
 191         char *wbuf;
 192
 193         blobmsg_parse(rpc_file_rb_policy, __RPC_F_RB_MAX, tb, blob_data(msg), blob_len(msg));
 194
 195         if (!tb[RPC_F_RB_PATH])
 196                 return rpc_errno_status();
 197
 198         path = blobmsg_data(tb[RPC_F_RB_PATH]);
 199
 200         if (stat(path, &s))
 201                 return rpc_errno_status();
 202
 203         if (s.st_size >= RPC_FILE_MAX_SIZE)
 204                 return UBUS_STATUS_NOT_SUPPORTED;
 205
 206         if ((fd = open(path, O_RDONLY)) < 0)
 207                 return rpc_errno_status();
 208
 209         /* some sysfs files do not report a length */
 210         if (s.st_size == 0)
 211                 s.st_size = RPC_FILE_MIN_SIZE;
 212
 213         blob_buf_init(&buf, 0);
 214
 215         if (tb[RPC_F_RB_BASE64])
 216                 base64 = blobmsg_get_bool(tb[RPC_F_RB_BASE64]);
 217
 218         len = s.st_size + 1;
 219         if (base64)
 220                 len = B64_ENCODE_LEN(s.st_size);
 221         wbuf = blobmsg_alloc_string_buffer(&buf, "data", len);
 222
 223         if (!wbuf)
 224         {
 225                 rv = UBUS_STATUS_UNKNOWN_ERROR;
 226                 goto out;
 227         }
 228
 229         if ((len = read(fd, wbuf, s.st_size)) <= 0)
 230         {
 231                 rv = UBUS_STATUS_NO_DATA;
 232                 goto out;
 233         }
 234
 235         if (base64)
 236         {
 237                 uint8_t *data = calloc(len, sizeof(uint8_t));
 238                 if (!data)
 239                 {
 240                         rv = UBUS_STATUS_UNKNOWN_ERROR;
 241                         goto out;
 242                 }
 243                 memcpy(data, wbuf, len);
 244
 245                 len = b64_encode(data, len, wbuf, B64_ENCODE_LEN(len));
 246                 free(data);
 247                 if (len < 0)
 248                 {
 249                         rv = UBUS_STATUS_UNKNOWN_ERROR;
 250                         goto out;
 251                 }
 252         }
 253
 254         *(wbuf + len) = '\0';
 255         blobmsg_add_string_buffer(&buf);
 256
 257         ubus_send_reply(ctx, req, buf.head);
 258         rv = UBUS_STATUS_OK;
 259
 260 out:
 261         blob_buf_free(&buf);
 262         close(fd);
 263         return rv;
 264 }
 265
 266 static int
 267 rpc_file_write(struct ubus_context *ctx, struct ubus_object *obj,
 268                struct ubus_request_data *req, const char *method,
 269                struct blob_attr *msg)
 270 {
 271         struct blob_attr *tb[__RPC_F_RW_MAX];
 272         int append = O_TRUNC;
 273         mode_t prev_mode, mode = 0666;
 274         int fd, rv = 0;
 275         void *data = NULL;
 276         ssize_t data_len = 0;
 277
 278         blobmsg_parse(rpc_file_rw_policy, __RPC_F_RW_MAX, tb,
 279                       blob_data(msg), blob_len(msg));
 280
 281         if (!tb[RPC_F_RW_PATH] || !tb[RPC_F_RW_DATA])
 282                 return UBUS_STATUS_INVALID_ARGUMENT;
 283
 284         data = blobmsg_data(tb[RPC_F_RW_DATA]);
 285         data_len = blobmsg_data_len(tb[RPC_F_RW_DATA]) - 1;
 286
 287         if (tb[RPC_F_RW_APPEND] && blobmsg_get_bool(tb[RPC_F_RW_APPEND]))
 288                 append = O_APPEND;
 289
 290         if (tb[RPC_F_RW_MODE])
 291                 mode = blobmsg_get_u32(tb[RPC_F_RW_MODE]);
 292
 293         prev_mode = umask(0);
 294         fd = open(blobmsg_data(tb[RPC_F_RW_PATH]), O_CREAT | O_WRONLY | append, mode);
 295         umask(prev_mode);
 296         if (fd < 0)
 297                 return rpc_errno_status();
 298
 299         if (tb[RPC_F_RW_BASE64] && blobmsg_get_bool(tb[RPC_F_RW_BASE64]))
 300         {
 301                 data_len = b64_decode(data, data, data_len);
 302                 if (data_len < 0)
 303                 {
 304                         rv = UBUS_STATUS_UNKNOWN_ERROR;
 305                         goto out;
 306                 }
 307         }
 308
 309         if (write(fd, data, data_len) < 0)
 310                 rv = -1;
 311
 312 out:
 313         if (fsync(fd) < 0)
 314                 rv = -1;
 315
 316         close(fd);
 317         sync();
 318
 319         if (rv)
 320                 return rpc_errno_status();
 321
 322         return 0;
 323 }
 324
 325 static int
 326 rpc_file_md5(struct ubus_context *ctx, struct ubus_object *obj,
 327              struct ubus_request_data *req, const char *method,
 328              struct blob_attr *msg)
 329 {
 330         int rv, i;
 331         char *path;
 332         struct stat s;
 333         uint8_t md5[16];
 334         char *wbuf;
 335
 336         if (!rpc_check_path(msg, &path, &s))
 337                 return rpc_errno_status();
 338
 339         if (!S_ISREG(s.st_mode))
 340                 return UBUS_STATUS_NOT_SUPPORTED;
 341
 342         if ((rv = md5sum(path, md5)) <= 0)
 343                 return rpc_errno_status();
 344
 345         blob_buf_init(&buf, 0);
 346         wbuf = blobmsg_alloc_string_buffer(&buf, "md5", 33);
 347
 348         for (i = 0; i < 16; i++)
 349                 sprintf(wbuf + (i * 2), "%02x", (uint8_t) md5[i]);
 350
 351         blobmsg_add_string_buffer(&buf);
 352         ubus_send_reply(ctx, req, buf.head);
 353         blob_buf_free(&buf);
 354
 355         return UBUS_STATUS_OK;
 356 }
 357
 358 static int
 359 rpc_file_list(struct ubus_context *ctx, struct ubus_object *obj,
 360               struct ubus_request_data *req, const char *method,
 361               struct blob_attr *msg)
 362 {
 363         DIR *fd;
 364         void *c, *d;
 365         char *path;
 366         struct stat s;
 367         struct dirent *e;
 368
 369         if (!rpc_check_path(msg, &path, &s))
 370                 return rpc_errno_status();
 371
 372         if ((fd = opendir(path)) == NULL)
 373                 return rpc_errno_status();
 374
 375         blob_buf_init(&buf, 0);
 376         c = blobmsg_open_array(&buf, "entries");
 377
 378         while ((e = readdir(fd)) != NULL)
 379         {
 380                 if (!strcmp(e->d_name, ".") || !strcmp(e->d_name, ".."))
 381                         continue;
 382
 383                 d = blobmsg_open_table(&buf, NULL);
 384                 blobmsg_add_string(&buf, "name", e->d_name);
 385                 blobmsg_add_string(&buf, "type", d_types[e->d_type]);
 386                 blobmsg_close_table(&buf, d);
 387         }
 388
 389         closedir(fd);
 390
 391         blobmsg_close_array(&buf, c);
 392         ubus_send_reply(ctx, req, buf.head);
 393         blob_buf_free(&buf);
 394
 395         return 0;
 396 }
 397
 398 static int
 399 rpc_file_stat(struct ubus_context *ctx, struct ubus_object *obj,
 400               struct ubus_request_data *req, const char *method,
 401               struct blob_attr *msg)
 402 {
 403         int type;
 404         char *path;
 405         struct stat s;
 406
 407         if (!rpc_check_path(msg, &path, &s))
 408                 return rpc_errno_status();
 409
 410         blob_buf_init(&buf, 0);
 411
 412         type = S_ISREG(s.st_mode) ? DT_REG :
 413                 S_ISDIR(s.st_mode) ? DT_DIR :
 414                  S_ISCHR(s.st_mode) ? DT_CHR :
 415                   S_ISBLK(s.st_mode) ? DT_BLK :
 416                    S_ISFIFO(s.st_mode) ? DT_FIFO :
 417                     S_ISLNK(s.st_mode) ? DT_LNK :
 418                      S_ISSOCK(s.st_mode) ? DT_SOCK :
 419                       DT_UNKNOWN;
 420
 421         blobmsg_add_string(&buf, "path", path);
 422         blobmsg_add_string(&buf, "type", d_types[type]);
 423         blobmsg_add_u32(&buf, "size",  s.st_size);
 424         blobmsg_add_u32(&buf, "mode",  s.st_mode);
 425         blobmsg_add_u32(&buf, "atime", s.st_atime);
 426         blobmsg_add_u32(&buf, "mtime", s.st_mtime);
 427         blobmsg_add_u32(&buf, "ctime", s.st_ctime);
 428         blobmsg_add_u32(&buf, "inode", s.st_ino);
 429         blobmsg_add_u32(&buf, "uid",   s.st_uid);
 430         blobmsg_add_u32(&buf, "gid",   s.st_gid);
 431
 432         ubus_send_reply(ctx, req, buf.head);
 433         blob_buf_free(&buf);
 434
 435         return 0;
 436 }
 437
 438 static const char *
 439 rpc_file_exec_lookup(const char *cmd)
 440 {
 441         struct stat s;
 442         int plen = 0, clen = strlen(cmd) + 1;
 443         char *search, *p;
 444         static char path[PATH_MAX];
 445
 446         if (!stat(cmd, &s) && S_ISREG(s.st_mode))
 447                 return cmd;
 448
 449         search = getenv("PATH");
 450
 451         if (!search)
 452                 search = "/bin:/usr/bin:/sbin:/usr/sbin";
 453
 454         p = search;
 455
 456         do
 457         {
 458                 if (*p != ':' && *p != '\0')
 459                         continue;
 460
 461                 plen = p - search;
 462
 463                 if ((plen + clen) >= sizeof(path))
 464                         continue;
 465
 466                 strncpy(path, search, plen);
 467                 sprintf(path + plen, "/%s", cmd);
 468
 469                 if (!stat(path, &s) && S_ISREG(s.st_mode))
 470                         return path;
 471
 472                 search = p + 1;
 473         }
 474         while (*p++);
 475
 476         return NULL;
 477 }
 478
 479
 480 static void
 481 rpc_ustream_to_blobmsg(struct ustream *s, const char *name)
 482 {
 483         int len;
 484         char *rbuf, *wbuf;
 485
 486         if ((len = ustream_pending_data(s, false)) > 0)
 487         {
 488                 wbuf = blobmsg_alloc_string_buffer(&buf, name, len + 1);
 489
 490                 if (!wbuf)
 491                         return;
 492
 493                 ustream_for_each_read_buffer(s, rbuf, len)
 494                 {
 495                         memcpy(wbuf, rbuf, len);
 496                         wbuf += len;
 497                 }
 498
 499                 *wbuf = 0;
 500                 blobmsg_add_string_buffer(&buf);
 501         }
 502 }
 503
 504 static void
 505 rpc_file_exec_reply(struct rpc_file_exec_context *c, int rv)
 506 {
 507         uloop_timeout_cancel(&c->timeout);
 508         uloop_process_delete(&c->process);
 509
 510         if (rv == UBUS_STATUS_OK)
 511         {
 512                 blob_buf_init(&buf, 0);
 513
 514                 blobmsg_add_u32(&buf, "code", WEXITSTATUS(c->stat));
 515
 516                 rpc_ustream_to_blobmsg(&c->opipe.stream, "stdout");
 517                 rpc_ustream_to_blobmsg(&c->epipe.stream, "stderr");
 518
 519                 ubus_send_reply(c->context, &c->request, buf.head);
 520                 blob_buf_free(&buf);
 521         }
 522
 523         ubus_complete_deferred_request(c->context, &c->request, rv);
 524
 525         ustream_free(&c->opipe.stream);
 526         ustream_free(&c->epipe.stream);
 527
 528         close(c->opipe.fd.fd);
 529         close(c->epipe.fd.fd);
 530
 531         free(c);
 532 }
 533
 534 static void
 535 rpc_file_exec_timeout_cb(struct uloop_timeout *t)
 536 {
 537         struct rpc_file_exec_context *c =
 538                 container_of(t, struct rpc_file_exec_context, timeout);
 539
 540         kill(c->process.pid, SIGKILL);
 541         rpc_file_exec_reply(c, UBUS_STATUS_TIMEOUT);
 542 }
 543
 544 static void
 545 rpc_file_exec_process_cb(struct uloop_process *p, int stat)
 546 {
 547         struct rpc_file_exec_context *c =
 548                 container_of(p, struct rpc_file_exec_context, process);
 549
 550         c->stat = stat;
 551
 552         ustream_poll(&c->opipe.stream);
 553         ustream_poll(&c->epipe.stream);
 554 }
 555
 556 static void
 557 rpc_file_exec_opipe_read_cb(struct ustream *s, int bytes)
 558 {
 559         struct rpc_file_exec_context *c =
 560                 container_of(s, struct rpc_file_exec_context, opipe.stream);
 561
 562         if (ustream_read_buf_full(s))
 563                 rpc_file_exec_reply(c, UBUS_STATUS_NOT_SUPPORTED);
 564 }
 565
 566 static void
 567 rpc_file_exec_epipe_read_cb(struct ustream *s, int bytes)
 568 {
 569         struct rpc_file_exec_context *c =
 570                 container_of(s, struct rpc_file_exec_context, epipe.stream);
 571
 572         if (ustream_read_buf_full(s))
 573                 rpc_file_exec_reply(c, UBUS_STATUS_NOT_SUPPORTED);
 574 }
 575
 576 static void
 577 rpc_file_exec_opipe_state_cb(struct ustream *s)
 578 {
 579         struct rpc_file_exec_context *c =
 580                 container_of(s, struct rpc_file_exec_context, opipe.stream);
 581
 582         if (c->opipe.stream.eof && c->epipe.stream.eof)
 583                 rpc_file_exec_reply(c, UBUS_STATUS_OK);
 584 }
 585
 586 static void
 587 rpc_file_exec_epipe_state_cb(struct ustream *s)
 588 {
 589         struct rpc_file_exec_context *c =
 590                 container_of(s, struct rpc_file_exec_context, epipe.stream);
 591
 592         if (c->opipe.stream.eof && c->epipe.stream.eof)
 593                 rpc_file_exec_reply(c, UBUS_STATUS_OK);
 594 }
 595
 596 static int
 597 rpc_file_exec_run(const char *cmd,
 598                   const struct blob_attr *arg, const struct blob_attr *env,
 599                   struct ubus_context *ctx, struct ubus_request_data *req)
 600 {
 601         pid_t pid;
 602
 603         int opipe[2];
 604         int epipe[2];
 605
 606         int rem;
 607         struct blob_attr *cur;
 608
 609         char arglen;
 610         char **args;
 611
 612         struct rpc_file_exec_context *c;
 613
 614         cmd = rpc_file_exec_lookup(cmd);
 615
 616         if (!cmd)
 617                 return UBUS_STATUS_NOT_FOUND;
 618
 619         c = malloc(sizeof(*c));
 620
 621         if (!c)
 622                 return UBUS_STATUS_UNKNOWN_ERROR;
 623
 624         if (pipe(opipe) || pipe(epipe))
 625                 return rpc_errno_status();
 626
 627         switch ((pid = fork()))
 628         {
 629         case -1:
 630                 return rpc_errno_status();
 631
 632         case 0:
 633                 uloop_done();
 634
 635                 dup2(opipe[1], 1);
 636                 dup2(epipe[1], 2);
 637
 638                 close(0);
 639                 close(opipe[0]);
 640                 close(opipe[1]);
 641                 close(epipe[0]);
 642                 close(epipe[1]);
 643
 644                 arglen = 2;
 645                 args = malloc(sizeof(char *) * arglen);
 646
 647                 if (!args)
 648                         return UBUS_STATUS_UNKNOWN_ERROR;
 649
 650                 args[0] = (char *)cmd;
 651                 args[1] = NULL;
 652
 653                 if (arg)
 654                 {
 655                         blobmsg_for_each_attr(cur, arg, rem)
 656                         {
 657                                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
 658                                         continue;
 659
 660                                 arglen++;
 661
 662                                 if (!(args = realloc(args, sizeof(char *) * arglen)))
 663                                         return UBUS_STATUS_UNKNOWN_ERROR;
 664
 665                                 args[arglen-2] = blobmsg_data(cur);
 666                                 args[arglen-1] = NULL;
 667                         }
 668                 }
 669
 670                 if (env)
 671                 {
 672                         blobmsg_for_each_attr(cur, env, rem)
 673                         {
 674                                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
 675                                         continue;
 676
 677                                 setenv(blobmsg_name(cur), blobmsg_data(cur), 1);
 678                         }
 679                 }
 680
 681                 if (execv(cmd, args))
 682                         return rpc_errno_status();
 683
 684         default:
 685                 memset(c, 0, sizeof(*c));
 686
 687                 ustream_declare(c->opipe, opipe[0], exec_opipe);
 688                 ustream_declare(c->epipe, epipe[0], exec_epipe);
 689
 690                 c->process.pid = pid;
 691                 c->process.cb = rpc_file_exec_process_cb;
 692                 uloop_process_add(&c->process);
 693
 694                 c->timeout.cb = rpc_file_exec_timeout_cb;
 695                 uloop_timeout_set(&c->timeout, *ops->exec_timeout);
 696
 697                 close(opipe[1]);
 698                 close(epipe[1]);
 699
 700                 c->context = ctx;
 701                 ubus_defer_request(ctx, req, &c->request);
 702         }
 703
 704         return UBUS_STATUS_OK;
 705 }
 706
 707 static int
 708 rpc_file_exec(struct ubus_context *ctx, struct ubus_object *obj,
 709               struct ubus_request_data *req, const char *method,
 710               struct blob_attr *msg)
 711 {
 712         struct blob_attr *tb[__RPC_E_MAX];
 713
 714         blobmsg_parse(rpc_exec_policy, __RPC_E_MAX, tb,
 715                       blob_data(msg), blob_len(msg));
 716
 717         if (!tb[RPC_E_CMD])
 718                 return UBUS_STATUS_INVALID_ARGUMENT;
 719
 720         return rpc_file_exec_run(blobmsg_data(tb[RPC_E_CMD]),
 721                                               tb[RPC_E_PARM], tb[RPC_E_ENV], ctx, req);
 722 }
 723
 724
 725 static int
 726 rpc_file_api_init(const struct rpc_daemon_ops *o, struct ubus_context *ctx)
 727 {
 728         static const struct ubus_method file_methods[] = {
 729                 UBUS_METHOD("read",    rpc_file_read,  rpc_file_rb_policy),
 730                 UBUS_METHOD("write",   rpc_file_write, rpc_file_rw_policy),
 731                 UBUS_METHOD("list",    rpc_file_list,  rpc_file_r_policy),
 732                 UBUS_METHOD("stat",    rpc_file_stat,  rpc_file_r_policy),
 733                 UBUS_METHOD("md5",     rpc_file_md5,   rpc_file_r_policy),
 734                 UBUS_METHOD("exec",    rpc_file_exec,  rpc_exec_policy),
 735         };
 736
 737         static struct ubus_object_type file_type =
 738                 UBUS_OBJECT_TYPE("luci-rpc-file", file_methods);
 739
 740         static struct ubus_object obj = {
 741                 .name = "file",
 742                 .type = &file_type,
 743                 .methods = file_methods,
 744                 .n_methods = ARRAY_SIZE(file_methods),
 745         };
 746
 747         ops = o;
 748
 749         return ubus_add_object(ctx, &obj);
 750 }
 751
 752 struct rpc_plugin rpc_plugin = {
 753         .init = rpc_file_api_init
 754 };