Parent: [5370b3] (diff)

Child: [86e64d] (diff)

Download this file

execmd.cpp    1494 lines (1355 with data), 43.6 kB

   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
/* Copyright (C) 2004 J.F.Dockes
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef TEST_EXECMD
#ifdef BUILDING_RECOLL
#include "autoconfig.h"
#else
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/select.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <fcntl.h>
#include <errno.h>
#include <signal.h>
#include <time.h>
#include <vector>
#include <string>
#include <stdexcept>
#ifdef HAVE_SPAWN_H
#ifndef __USE_GNU
#define __USE_GNU
#define undef__USE_GNU
#endif
#include <spawn.h>
#ifdef undef__USE_GNU
#undef __USE_GNU
#endif
#endif
#include "execmd.h"
#include "netcon.h"
#include "closefrom.h"
#include "smallut.h"
#include "log.h"
using namespace std;
extern char **environ;
class ExecCmd::Internal {
public:
Internal()
: m_advise(0), m_provide(0), m_timeoutMs(1000),
m_rlimit_as_mbytes(0) {
}
static bool o_useVfork;
std::vector<std::string> m_env;
ExecCmdAdvise *m_advise;
ExecCmdProvide *m_provide;
bool m_killRequest;
int m_timeoutMs;
int m_rlimit_as_mbytes;
string m_stderrFile;
// Pipe for data going to the command
int m_pipein[2];
STD_SHARED_PTR<NetconCli> m_tocmd;
// Pipe for data coming out
int m_pipeout[2];
STD_SHARED_PTR<NetconCli> m_fromcmd;
// Subprocess id
pid_t m_pid;
// Saved sigmask
sigset_t m_blkcld;
// Reset internal state indicators. Any resources should have been
// previously freed
void reset() {
m_killRequest = false;
m_pipein[0] = m_pipein[1] = m_pipeout[0] = m_pipeout[1] = -1;
m_pid = -1;
sigemptyset(&m_blkcld);
}
// Child process code
inline void dochild(const std::string& cmd, const char **argv,
const char **envv, bool has_input, bool has_output);
};
bool ExecCmd::Internal::o_useVfork = false;
ExecCmd::ExecCmd(int)
{
m = new Internal();
if (m) {
m->reset();
}
}
void ExecCmd::setAdvise(ExecCmdAdvise *adv)
{
m->m_advise = adv;
}
void ExecCmd::setProvide(ExecCmdProvide *p)
{
m->m_provide = p;
}
void ExecCmd::setTimeout(int mS)
{
if (mS > 30) {
m->m_timeoutMs = mS;
}
}
void ExecCmd::setStderr(const std::string& stderrFile)
{
m->m_stderrFile = stderrFile;
}
pid_t ExecCmd::getChildPid()
{
return m->m_pid;
}
void ExecCmd::setKill()
{
m->m_killRequest = true;
}
void ExecCmd::zapChild()
{
setKill();
(void)wait();
}
bool ExecCmd::requestChildExit()
{
if (m->m_pid > 0) {
if (kill(m->m_pid, SIGTERM) == 0) {
return true;
}
}
return false;
}
/* From FreeBSD's which command */
static bool exec_is_there(const char *candidate)
{
struct stat fin;
/* XXX work around access(2) false positives for superuser */
if (access(candidate, X_OK) == 0 &&
stat(candidate, &fin) == 0 &&
S_ISREG(fin.st_mode) &&
(getuid() != 0 ||
(fin.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH)) != 0)) {
return true;
}
return false;
}
bool ExecCmd::which(const string& cmd, string& exepath, const char* path)
{
if (cmd.empty()) {
return false;
}
if (cmd[0] == '/') {
if (exec_is_there(cmd.c_str())) {
exepath = cmd;
return true;
} else {
return false;
}
}
const char *pp;
if (path) {
pp = path;
} else {
pp = getenv("PATH");
}
if (pp == 0) {
return false;
}
vector<string> pels;
stringToTokens(pp, pels, ":");
for (vector<string>::iterator it = pels.begin(); it != pels.end(); it++) {
if (it->empty()) {
*it = ".";
}
string candidate = (it->empty() ? string(".") : *it) + "/" + cmd;
if (exec_is_there(candidate.c_str())) {
exepath = candidate;
return true;
}
}
return false;
}
void ExecCmd::useVfork(bool on)
{
// Just in case: there are competent people who believe that the
// dynamic linker can sometimes deadlock if execve() is resolved
// inside the vfork/exec window. Make sure it's done now. If "/" is
// an executable file, we have a problem.
const char *argv[] = {"/", 0};
execve("/", (char *const *)argv, environ);
Internal::o_useVfork = on;
}
void ExecCmd::putenv(const string& ea)
{
m->m_env.push_back(ea);
}
void ExecCmd::putenv(const string& name, const string& value)
{
string ea = name + "=" + value;
putenv(ea);
}
static void msleep(int millis)
{
struct timespec spec;
spec.tv_sec = millis / 1000;
spec.tv_nsec = (millis % 1000) * 1000000;
nanosleep(&spec, 0);
}
/** A resource manager to ensure that execcmd cleans up if an exception is
* raised in the callback, or at different places on errors occurring
* during method executions */
class ExecCmdRsrc {
public:
ExecCmdRsrc(ExecCmd::Internal *parent)
: m_parent(parent), m_active(true) {
}
void inactivate() {
m_active = false;
}
~ExecCmdRsrc() {
if (!m_active || !m_parent) {
return;
}
LOGDEB1("~ExecCmdRsrc: working. mypid: " << getpid() << "\n");
// Better to close the descs first in case the child is waiting in read
if (m_parent->m_pipein[0] >= 0) {
close(m_parent->m_pipein[0]);
}
if (m_parent->m_pipein[1] >= 0) {
close(m_parent->m_pipein[1]);
}
if (m_parent->m_pipeout[0] >= 0) {
close(m_parent->m_pipeout[0]);
}
if (m_parent->m_pipeout[1] >= 0) {
close(m_parent->m_pipeout[1]);
}
// It's apparently possible for m_pid to be > 0 and getpgid to fail. In
// this case, we have to conclude that the child process does
// not exist. Not too sure what causes this, but the previous code
// definitely tried to call killpg(-1,) from time to time.
pid_t grp;
if (m_parent->m_pid > 0 && (grp = getpgid(m_parent->m_pid)) > 0) {
LOGDEB("ExecCmd: killpg(" << (grp) << ", SIGTERM)\n");
int ret = killpg(grp, SIGTERM);
if (ret == 0) {
for (int i = 0; i < 3; i++) {
msleep(i == 0 ? 5 : (i == 1 ? 100 : 2000));
int status;
(void)waitpid(m_parent->m_pid, &status, WNOHANG);
if (kill(m_parent->m_pid, 0) != 0) {
break;
}
if (i == 2) {
LOGDEB("ExecCmd: killpg(" << (grp) << ", SIGKILL)\n");
killpg(grp, SIGKILL);
(void)waitpid(m_parent->m_pid, &status, WNOHANG);
}
}
} else {
LOGERR("ExecCmd: error killing process group " << (grp) <<
": " << errno << "\n");
}
}
m_parent->m_tocmd.reset();
m_parent->m_fromcmd.reset();
pthread_sigmask(SIG_UNBLOCK, &m_parent->m_blkcld, 0);
m_parent->reset();
}
private:
ExecCmd::Internal *m_parent;
bool m_active;
};
ExecCmd::~ExecCmd()
{
ExecCmdRsrc(this->m);
if (m) {
delete m;
}
}
// In child process. Set up pipes and exec command.
// This must not return. _exit() on error.
// *** This can be called after a vfork, so no modification of the
// process memory at all is allowed ***
// The LOGXX calls should not be there, but they occur only after "impossible"
// errors, which we would most definitely want to have a hint about.
//
// Note that any of the LOGXX calls could block on a mutex set in the
// father process, so that only absolutely exceptional conditions,
// should be logged, for debugging and post-mortem purposes
// If one of the calls block, the problem manifests itself by 20mn
// (filter timeout) of looping on "ExecCmd::doexec: selectloop
// returned 1', because the father is waiting on the read descriptor
inline void ExecCmd::Internal::dochild(const string& cmd, const char **argv,
const char **envv,
bool has_input, bool has_output)
{
// Start our own process group
if (setpgid(0, getpid())) {
LOGINFO("ExecCmd::DOCHILD: setpgid(0, " << getpid() <<
") failed: errno " << errno << "\n");
}
// Restore SIGTERM to default. Really, signal handling should be
// specified when creating the execmd, there might be other
// signals to reset. Resetting SIGTERM helps Recoll get rid of its
// filter children for now though. To be fixed one day...
// Note that resetting to SIG_DFL is a portable use of
// signal(). No need for sigaction() here.
// There is supposedely a risk of problems if another thread was
// calling a signal-affecting function when vfork was called. This
// seems acceptable though as no self-respecting thread is going
// to mess with the global process signal disposition.
if (signal(SIGTERM, SIG_DFL) == SIG_ERR) {
//LOGERR("ExecCmd::DOCHILD: signal() failed, errno " << errno << "\n");
}
sigset_t sset;
sigfillset(&sset);
pthread_sigmask(SIG_UNBLOCK, &sset, 0);
sigprocmask(SIG_UNBLOCK, &sset, 0);
#ifdef HAVE_SETRLIMIT
#if defined RLIMIT_AS || defined RLIMIT_VMEM || defined RLIMIT_DATA
if (m_rlimit_as_mbytes > 2000 && sizeof(rlim_t) < 8) {
// Impossible limit, don't use it
m_rlimit_as_mbytes = 0;
}
if (m_rlimit_as_mbytes > 0) {
struct rlimit ram_limit = {
static_cast<rlim_t>(m_rlimit_as_mbytes * 1024 * 1024),
RLIM_INFINITY
};
int resource;
// RLIMIT_AS and RLIMIT_VMEM are usually synonyms when VMEM is
// defined. RLIMIT_AS is Posix. Both don't really do what we
// want, because they count e.g. shared lib mappings, which we
// don't really care about.
// RLIMIT_DATA only limits the data segment. Modern mallocs
// use mmap and will not be bound. (Otoh if we only have this,
// we're probably not modern).
// So we're unsatisfied either way.
#ifdef RLIMIT_AS
resource = RLIMIT_AS;
#elif defined RLIMIT_VMEM
resource = RLIMIT_VMEM;
#else
resource = RLIMIT_DATA;
#endif
setrlimit(resource, &ram_limit);
}
#endif
#endif // have_setrlimit
if (has_input) {
close(m_pipein[1]);
if (m_pipein[0] != 0) {
dup2(m_pipein[0], 0);
close(m_pipein[0]);
}
}
if (has_output) {
close(m_pipeout[0]);
if (m_pipeout[1] != 1) {
if (dup2(m_pipeout[1], 1) < 0) {
LOGERR("ExecCmd::DOCHILD: dup2() failed. errno " <<
errno << "\n");
}
if (close(m_pipeout[1]) < 0) {
LOGERR("ExecCmd::DOCHILD: close() failed. errno " <<
errno << "\n");
}
}
}
// Do we need to redirect stderr ?
if (!m_stderrFile.empty()) {
int fd = open(m_stderrFile.c_str(), O_WRONLY | O_CREAT
#ifdef O_APPEND
| O_APPEND
#endif
, 0600);
if (fd < 0) {
close(2);
} else {
if (fd != 2) {
dup2(fd, 2);
}
lseek(2, 0, 2);
}
}
// Close all descriptors except 0,1,2
libclf_closefrom(3);
execve(cmd.c_str(), (char *const*)argv, (char *const*)envv);
// Hu ho. This should never have happened as we checked the
// existence of the executable before calling dochild... Until we
// did this check, this was the chief cause of LOG mutex deadlock
LOGERR("ExecCmd::DOCHILD: execve(" << cmd << ") failed. errno " <<
errno << "\n");
_exit(127);
}
void ExecCmd::setrlimit_as(int mbytes)
{
m->m_rlimit_as_mbytes = mbytes;
}
int ExecCmd::startExec(const string& cmd, const vector<string>& args,
bool has_input, bool has_output)
{
{
// Debug and logging
string command = cmd + " ";
for (vector<string>::const_iterator it = args.begin();
it != args.end(); it++) {
command += "{" + *it + "} ";
}
LOGDEB("ExecCmd::startExec: (" << has_input << "|" << has_output <<
") " << command << "\n");
}
// The resource manager ensures resources are freed if we return early
ExecCmdRsrc e(this->m);
if (has_input && pipe(m->m_pipein) < 0) {
LOGERR("ExecCmd::startExec: pipe(2) failed. errno " << errno << "\n" );
return -1;
}
if (has_output && pipe(m->m_pipeout) < 0) {
LOGERR("ExecCmd::startExec: pipe(2) failed. errno " << errno << "\n");
return -1;
}
//////////// vfork setup section
// We do here things that we could/should do after a fork(), but
// not a vfork(). Does no harm to do it here in both cases, except
// that it needs cleanup (as compared to doing it just before
// exec()).
// Allocate arg vector (2 more for arg0 + final 0)
typedef const char *Ccharp;
Ccharp *argv;
argv = (Ccharp *)malloc((args.size() + 2) * sizeof(char *));
if (argv == 0) {
LOGERR("ExecCmd::doexec: malloc() failed. errno " << errno << "\n");
return -1;
}
// Fill up argv
argv[0] = cmd.c_str();
int i = 1;
vector<string>::const_iterator it;
for (it = args.begin(); it != args.end(); it++) {
argv[i++] = it->c_str();
}
argv[i] = 0;
Ccharp *envv;
int envsize;
for (envsize = 0; ; envsize++)
if (environ[envsize] == 0) {
break;
}
envv = (Ccharp *)malloc((envsize + m->m_env.size() + 2) * sizeof(char *));
if (envv == 0) {
LOGERR("ExecCmd::doexec: malloc() failed. errno " << errno << "\n");
free(argv);
return -1;
}
int eidx;
for (eidx = 0; eidx < envsize; eidx++) {
envv[eidx] = environ[eidx];
}
for (vector<string>::const_iterator it = m->m_env.begin();
it != m->m_env.end(); it++) {
envv[eidx++] = it->c_str();
}
envv[eidx] = 0;
// As we are going to use execve, not execvp, do the PATH thing.
string exe;
if (!which(cmd, exe)) {
LOGERR("ExecCmd::startExec: " << (cmd) << " not found\n");
free(argv);
free(envv);
return -1;
}
//////////////////////////////// End vfork child prepare section.
#if HAVE_POSIX_SPAWN && USE_POSIX_SPAWN
// Note that posix_spawn provides no way to setrlimit() the child.
{
posix_spawnattr_t attrs;
posix_spawnattr_init(&attrs);
short flags;
posix_spawnattr_getflags(&attrs, &flags);
flags |= POSIX_SPAWN_USEVFORK;
posix_spawnattr_setpgroup(&attrs, 0);
flags |= POSIX_SPAWN_SETPGROUP;
sigset_t sset;
sigemptyset(&sset);
posix_spawnattr_setsigmask(&attrs, &sset);
flags |= POSIX_SPAWN_SETSIGMASK;
sigemptyset(&sset);
sigaddset(&sset, SIGTERM);
posix_spawnattr_setsigdefault(&attrs, &sset);
flags |= POSIX_SPAWN_SETSIGDEF;
posix_spawnattr_setflags(&attrs, flags);
posix_spawn_file_actions_t facts;
posix_spawn_file_actions_init(&facts);
if (has_input) {
posix_spawn_file_actions_addclose(&facts, m->m_pipein[1]);
if (m->m_pipein[0] != 0) {
posix_spawn_file_actions_adddup2(&facts, m->m_pipein[0], 0);
posix_spawn_file_actions_addclose(&facts, m->m_pipein[0]);
}
}
if (has_output) {
posix_spawn_file_actions_addclose(&facts, m->m_pipeout[0]);
if (m->m_pipeout[1] != 1) {
posix_spawn_file_actions_adddup2(&facts, m->m_pipeout[1], 1);
posix_spawn_file_actions_addclose(&facts, m->m_pipeout[1]);
}
}
// Do we need to redirect stderr ?
if (!m->m_stderrFile.empty()) {
int oflags = O_WRONLY | O_CREAT;
#ifdef O_APPEND
oflags |= O_APPEND;
#endif
posix_spawn_file_actions_addopen(&facts, 2, m->m_stderrFile.c_str(),
oflags, 0600);
}
LOGDEB1("using SPAWN\n");
// posix_spawn() does not have any standard way to ask for
// calling closefrom(). Afaik there is a solaris extension for this,
// but let's just add all fds
for (int i = 3; i < libclf_maxfd(); i++) {
posix_spawn_file_actions_addclose(&facts, i);
}
int ret = posix_spawn(&m->m_pid, exe.c_str(), &facts, &attrs,
(char *const *)argv, (char *const *)envv);
posix_spawnattr_destroy(&attrs);
posix_spawn_file_actions_destroy(&facts);
if (ret) {
LOGERR("ExecCmd::startExec: posix_spawn() failed. errno " << ret <<
"\n");
return -1;
}
}
#else
if (Internal::o_useVfork) {
LOGDEB1("using VFORK\n");
m->m_pid = vfork();
} else {
LOGDEB1("using FORK\n");
m->m_pid = fork();
}
if (m->m_pid < 0) {
LOGERR("ExecCmd::startExec: fork(2) failed. errno " << errno << "\n");
return -1;
}
if (m->m_pid == 0) {
// e.inactivate() is not needed. As we do not return, the call
// stack won't be unwound and destructors of local objects
// won't be called.
m->dochild(exe, argv, envv, has_input, has_output);
// dochild does not return. Just in case...
_exit(1);
}
#endif
// Father process
////////////////////
// Vfork cleanup section
free(argv);
free(envv);
///////////////////
// Set the process group for the child. This is also done in the
// child process see wikipedia(Process_group)
if (setpgid(m->m_pid, m->m_pid)) {
// This can fail with EACCES if the son has already done execve
// (linux at least)
LOGDEB2("ExecCmd: father setpgid(son)(" << m->m_pid << "," <<
m->m_pid << ") errno " << errno << " (ok)\n");
}
sigemptyset(&m->m_blkcld);
sigaddset(&m->m_blkcld, SIGCHLD);
pthread_sigmask(SIG_BLOCK, &m->m_blkcld, 0);
if (has_input) {
close(m->m_pipein[0]);
m->m_pipein[0] = -1;
NetconCli *iclicon = new NetconCli();
iclicon->setconn(m->m_pipein[1]);
m->m_tocmd = STD_SHARED_PTR<NetconCli>(iclicon);
}
if (has_output) {
close(m->m_pipeout[1]);
m->m_pipeout[1] = -1;
NetconCli *oclicon = new NetconCli();
oclicon->setconn(m->m_pipeout[0]);
m->m_fromcmd = STD_SHARED_PTR<NetconCli>(oclicon);
}
/* Don't want to undo what we just did ! */
e.inactivate();
return 0;
}
// Netcon callback. Send data to the command's input
class ExecWriter : public NetconWorker {
public:
ExecWriter(const string *input, ExecCmdProvide *provide,
ExecCmd::Internal *parent)
: m_cmd(parent), m_input(input), m_cnt(0), m_provide(provide) {
}
void shutdown() {
close(m_cmd->m_pipein[1]);
m_cmd->m_pipein[1] = -1;
m_cmd->m_tocmd.reset();
}
virtual int data(NetconData *con, Netcon::Event reason) {
if (!m_input) {
return -1;
}
LOGDEB1("ExecWriter: input m_cnt " << m_cnt << " input length " <<
m_input->length() << "\n");
if (m_cnt >= m_input->length()) {
// Fd ready for more but we got none. Try to get data, else
// shutdown;
if (!m_provide) {
shutdown();
return 0;
}
m_provide->newData();
if (m_input->empty()) {
shutdown();
return 0;
} else {
// Ready with new buffer, reset use count
m_cnt = 0;
}
LOGDEB2("ExecWriter: provide m_cnt " << m_cnt <<
" input length " << m_input->length() << "\n");
}
int ret = con->send(m_input->c_str() + m_cnt,
m_input->length() - m_cnt);
LOGDEB2("ExecWriter: wrote " << (ret) << " to command\n");
if (ret <= 0) {
LOGERR("ExecWriter: data: can't write\n");
return -1;
}
m_cnt += ret;
return ret;
}
private:
ExecCmd::Internal *m_cmd;
const string *m_input;
unsigned int m_cnt; // Current offset inside m_input
ExecCmdProvide *m_provide;
};
// Netcon callback. Get data from the command output.
class ExecReader : public NetconWorker {
public:
ExecReader(string *output, ExecCmdAdvise *advise)
: m_output(output), m_advise(advise) {
}
virtual int data(NetconData *con, Netcon::Event reason) {
char buf[8192];
int n = con->receive(buf, 8192);
LOGDEB1("ExecReader: got " << (n) << " from command\n");
if (n < 0) {
LOGERR("ExecCmd::doexec: receive failed. errno " << errno << "\n");
} else if (n > 0) {
m_output->append(buf, n);
if (m_advise) {
m_advise->newData(n);
}
} // else n == 0, just return
return n;
}
private:
string *m_output;
ExecCmdAdvise *m_advise;
};
int ExecCmd::doexec(const string& cmd, const vector<string>& args,
const string *input, string *output)
{
if (startExec(cmd, args, input != 0, output != 0) < 0) {
return -1;
}
// Cleanup in case we return early
ExecCmdRsrc e(this->m);
SelectLoop myloop;
int ret = 0;
if (input || output) {
// Setup output
if (output) {
NetconCli *oclicon = m->m_fromcmd.get();
if (!oclicon) {
LOGERR("ExecCmd::doexec: no connection from command\n");
return -1;
}
oclicon->setcallback(STD_SHARED_PTR<NetconWorker>
(new ExecReader(output, m->m_advise)));
myloop.addselcon(m->m_fromcmd, Netcon::NETCONPOLL_READ);
// Give up ownership
m->m_fromcmd.reset();
}
// Setup input
if (input) {
NetconCli *iclicon = m->m_tocmd.get();
if (!iclicon) {
LOGERR("ExecCmd::doexec: no connection from command\n");
return -1;
}
iclicon->setcallback(STD_SHARED_PTR<NetconWorker>
(new ExecWriter(input, m->m_provide, m)));
myloop.addselcon(m->m_tocmd, Netcon::NETCONPOLL_WRITE);
// Give up ownership
m->m_tocmd.reset();
}
// Do the actual reading/writing/waiting
myloop.setperiodichandler(0, 0, m->m_timeoutMs);
while ((ret = myloop.doLoop()) > 0) {
LOGDEB("ExecCmd::doexec: selectloop returned " << (ret) << "\n");
if (m->m_advise) {
m->m_advise->newData(0);
}
if (m->m_killRequest) {
LOGINFO("ExecCmd::doexec: cancel request\n");
break;
}
}
LOGDEB0("ExecCmd::doexec: selectloop returned " << (ret) << "\n");
// Check for interrupt request: we won't want to waitpid()
if (m->m_advise) {
m->m_advise->newData(0);
}
// The netcons don't take ownership of the fds: we have to close them
// (have to do it before wait, this may be the signal the child is
// waiting for exiting).
if (input) {
close(m->m_pipein[1]);
m->m_pipein[1] = -1;
}
if (output) {
close(m->m_pipeout[0]);
m->m_pipeout[0] = -1;
}
}
// Normal return: deactivate cleaner, wait() will do the cleanup
e.inactivate();
int ret1 = ExecCmd::wait();
if (ret) {
return -1;
}
return ret1;
}
int ExecCmd::send(const string& data)
{
NetconCli *con = m->m_tocmd.get();
if (con == 0) {
LOGERR("ExecCmd::send: outpipe is closed\n");
return -1;
}
unsigned int nwritten = 0;
while (nwritten < data.length()) {
if (m->m_killRequest) {
break;
}
int n = con->send(data.c_str() + nwritten, data.length() - nwritten);
if (n < 0) {
LOGERR("ExecCmd::send: send failed\n");
return -1;
}
nwritten += n;
}
return nwritten;
}
int ExecCmd::receive(string& data, int cnt)
{
NetconCli *con = m->m_fromcmd.get();
if (con == 0) {
LOGERR("ExecCmd::receive: inpipe is closed\n");
return -1;
}
const int BS = 4096;
char buf[BS];
int ntot = 0;
do {
int toread = cnt > 0 ? MIN(cnt - ntot, BS) : BS;
int n = con->receive(buf, toread);
if (n < 0) {
LOGERR("ExecCmd::receive: error\n");
return -1;
} else if (n > 0) {
ntot += n;
data.append(buf, n);
} else {
LOGDEB("ExecCmd::receive: got 0\n");
break;
}
} while (cnt > 0 && ntot < cnt);
return ntot;
}
int ExecCmd::getline(string& data)
{
NetconCli *con = m->m_fromcmd.get();
if (con == 0) {
LOGERR("ExecCmd::receive: inpipe is closed\n");
return -1;
}
const int BS = 1024;
char buf[BS];
int timeosecs = m->m_timeoutMs / 1000;
if (timeosecs == 0) {
timeosecs = 1;
}
// Note that we only go once through here, except in case of
// timeout, which is why I think that the goto is more expressive
// than a loop
again:
int n = con->getline(buf, BS, timeosecs);
if (n < 0) {
if (con->timedout()) {
LOGDEB("ExecCmd::getline: timeout\n");
if (m->m_advise) {
m->m_advise->newData(0);
}
goto again;
}
LOGERR("ExecCmd::getline: error\n");
} else if (n > 0) {
data.append(buf, n);
} else {
LOGDEB("ExecCmd::getline: got 0\n");
}
return n;
}
class GetlineWatchdog : public ExecCmdAdvise {
public:
GetlineWatchdog(int secs) : m_secs(secs), tstart(time(0)) {}
void newData(int cnt) {
if (time(0) - tstart >= m_secs) {
throw std::runtime_error("getline timeout");
}
}
int m_secs;
time_t tstart;
};
int ExecCmd::getline(string& data, int timeosecs)
{
GetlineWatchdog gwd(timeosecs);
setAdvise(&gwd);
try {
return getline(data);
} catch (...) {
return -1;
}
}
// Wait for command status and clean up all resources.
// We would like to avoid blocking here too, but there is no simple
// way to do this. The 2 possible approaches would be to:
// - Use signals (alarm), waitpid() is interruptible. but signals and
// threads... This would need a specialized thread, inter-thread comms etc.
// - Use an intermediary process when starting the command. The
// process forks a timer process, and the real command, then calls
// a blocking waitpid on all at the end, and is guaranteed to get
// at least the timer process status, thus yielding a select()
// equivalent. This is bad too, because the timeout is on the whole
// exec, not just the wait
// Just calling waitpid() with WNOHANG with a sleep() between tries
// does not work: the first waitpid() usually comes too early and
// reaps nothing, resulting in almost always one sleep() or more.
//
// So no timeout here. This has not been a problem in practise inside recoll.
// In case of need, using a semi-busy loop with short sleeps
// increasing from a few mS might work without creating too much
// overhead.
int ExecCmd::wait()
{
ExecCmdRsrc e(this->m);
int status = -1;
if (!m->m_killRequest && m->m_pid > 0) {
if (waitpid(m->m_pid, &status, 0) < 0) {
LOGERR("ExecCmd::waitpid: returned -1 errno " << errno << "\n");
status = -1;
}
LOGDEB("ExecCmd::wait: got status 0x" << (status) << "\n");
m->m_pid = -1;
}
// Let the ExecCmdRsrc cleanup, it will do the killing/waiting if needed
return status;
}
bool ExecCmd::maybereap(int *status)
{
ExecCmdRsrc e(this->m);
*status = -1;
if (m->m_pid <= 0) {
// Already waited for ??
return true;
}
pid_t pid = waitpid(m->m_pid, status, WNOHANG);
if (pid < 0) {
LOGERR("ExecCmd::maybereap: returned -1 errno " << errno << "\n");
m->m_pid = -1;
return true;
} else if (pid == 0) {
LOGDEB1("ExecCmd::maybereap: not exited yet\n");
e.inactivate();
return false;
} else {
LOGDEB("ExecCmd::maybereap: got status 0x" << (status) << "\n");
m->m_pid = -1;
return true;
}
}
// Static
bool ExecCmd::backtick(const vector<string> cmd, string& out)
{
if (cmd.empty()) {
LOGERR("ExecCmd::backtick: empty command\n");
return false;
}
vector<string>::const_iterator it = cmd.begin();
it++;
vector<string> args(it, cmd.end());
ExecCmd mexec;
int status = mexec.doexec(*cmd.begin(), args, 0, &out);
return status == 0;
}
/// ReExec class methods ///////////////////////////////////////////////////
ReExec::ReExec(int argc, char *args[])
{
init(argc, args);
}
void ReExec::init(int argc, char *args[])
{
for (int i = 0; i < argc; i++) {
m_argv.push_back(args[i]);
}
m_cfd = open(".", 0);
char *cd = getcwd(0, 0);
if (cd) {
m_curdir = cd;
}
free(cd);
}
void ReExec::insertArgs(const vector<string>& args, int idx)
{
vector<string>::iterator it, cit;
unsigned int cmpoffset = (unsigned int) - 1;
if (idx == -1 || string::size_type(idx) >= m_argv.size()) {
it = m_argv.end();
if (m_argv.size() >= args.size()) {
cmpoffset = m_argv.size() - args.size();
}
} else {
it = m_argv.begin() + idx;
if (idx + args.size() <= m_argv.size()) {
cmpoffset = idx;
}
}
// Check that the option is not already there
if (cmpoffset != (unsigned int) - 1) {
bool allsame = true;
for (unsigned int i = 0; i < args.size(); i++) {
if (m_argv[cmpoffset + i] != args[i]) {
allsame = false;
break;
}
}
if (allsame) {
return;
}
}
m_argv.insert(it, args.begin(), args.end());
}
void ReExec::removeArg(const string& arg)
{
for (vector<string>::iterator it = m_argv.begin();
it != m_argv.end(); it++) {
if (*it == arg) {
it = m_argv.erase(it);
}
}
}
// Reexecute myself, as close as possible to the initial exec
void ReExec::reexec()
{
#if 0
char *cwd;
cwd = getcwd(0, 0);
FILE *fp = stdout; //fopen("/tmp/exectrace", "w");
if (fp) {
fprintf(fp, "reexec: pwd: [%s] args: ", cwd ? cwd : "getcwd failed");
for (vector<string>::const_iterator it = m_argv.begin();
it != m_argv.end(); it++) {
fprintf(fp, "[%s] ", it->c_str());
}
fprintf(fp, "\n");
}
#endif
// Execute the atexit funcs
while (!m_atexitfuncs.empty()) {
(m_atexitfuncs.top())();
m_atexitfuncs.pop();
}
// Try to get back to the initial working directory
if (m_cfd < 0 || fchdir(m_cfd) < 0) {
LOGINFO("ReExec::reexec: fchdir failed, trying chdir\n");
if (!m_curdir.empty() && chdir(m_curdir.c_str())) {
LOGERR("ReExec::reexec: chdir failed\n");
}
}
// Close all descriptors except 0,1,2
libclf_closefrom(3);
// Allocate arg vector (1 more for final 0)
typedef const char *Ccharp;
Ccharp *argv;
argv = (Ccharp *)malloc((m_argv.size() + 1) * sizeof(char *));
if (argv == 0) {
LOGERR("ExecCmd::doexec: malloc() failed. errno " << errno << "\n");
return;
}
// Fill up argv
int i = 0;
vector<string>::const_iterator it;
for (it = m_argv.begin(); it != m_argv.end(); it++) {
argv[i++] = it->c_str();
}
argv[i] = 0;
execvp(m_argv[0].c_str(), (char *const*)argv);
}
////////////////////////////////////////////////////////////////////
#else // TEST
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <string>
#include <iostream>
#include <sstream>
#include <vector>
#include "log.h"
#include "execmd.h"
#ifdef BUILDING_RECOLL
#include "smallut.h"
#include "cancelcheck.h"
#endif
using namespace std;
#ifdef BUILDING_RECOLL
// Testing the rclexecm protocol outside of recoll. Here we use the
// rcldoc.py filter, you can try with rclaudio too, adjust the file arg
// accordingly
bool exercise_mhexecm(const string& cmdstr, const string& mimetype,
vector<string>& files)
{
ExecCmd cmd;
vector<string> myparams;
if (cmd.startExec(cmdstr, myparams, 1, 1) < 0) {
cerr << "startExec " << cmdstr << " failed. Missing command?\n";
return false;
}
for (vector<string>::const_iterator it = files.begin();
it != files.end(); it++) {
// Build request message
ostringstream obuf;
obuf << "Filename: " << (*it).length() << "\n" << (*it);
obuf << "Mimetype: " << mimetype.length() << "\n" << mimetype;
// Bogus parameter should be skipped by filter
obuf << "BogusParam: " << string("bogus").length() << "\n" << "bogus";
obuf << "\n";
cerr << "SENDING: [" << obuf.str() << "]\n";
// Send it
if (cmd.send(obuf.str()) < 0) {
// The real code calls zapchild here, but we don't need it as
// this will be handled by ~ExecCmd
//cmd.zapChild();
cerr << "send error\n";
return false;
}
// Read answer
for (int loop = 0;; loop++) {
string name, data;
// Code from mh_execm.cpp: readDataElement
string ibuf;
// Read name and length
if (cmd.getline(ibuf) <= 0) {
cerr << "getline error\n";
return false;
}
// Empty line (end of message)
if (!ibuf.compare("\n")) {
cerr << "Got empty line\n";
name.clear();
break;
}
// Filters will sometimes abort before entering the real
// protocol, ie if a module can't be loaded. Check the
// special filter error first word:
if (ibuf.find("RECFILTERROR ") == 0) {
cerr << "Got RECFILTERROR\n";
return false;
}
// We're expecting something like Name: len\n
vector<string> tokens;
stringToTokens(ibuf, tokens);
if (tokens.size() != 2) {
cerr << "bad line in filter output: [" << ibuf << "]\n";
return false;
}
vector<string>::iterator it = tokens.begin();
name = *it++;
string& slen = *it;
int len;
if (sscanf(slen.c_str(), "%d", &len) != 1) {
cerr << "bad line in filter output (no len): [" <<
ibuf << "]\n";
return false;
}
// Read element data
data.erase();
if (len > 0 && cmd.receive(data, len) != len) {
cerr << "MHExecMultiple: expected " << len <<
" bytes of data, got " << data.length() << endl;
return false;
}
// Empty element: end of message
if (name.empty()) {
break;
}
cerr << "Got name: [" << name << "] data [" << data << "]\n";
}
}
return true;
}
#endif
static char *thisprog;
static char usage [] =
"trexecmd [-c -r -i -o] cmd [arg1 arg2 ...]\n"
" -c : test cancellation (ie: trexecmd -c sleep 1000)\n"
" -r : run reexec. Must be separate option.\n"
" -i : command takes input\n"
" -o : command produces output\n"
" If -i is set, we send /etc/group contents to whatever command is run\n"
" If -o is set, we print whatever comes out\n"
"trexecmd -m <filter> <mimetype> <file> [file ...]: test execm:\n"
" <filter> should be the path to an execm filter\n"
" <mimetype> the type of the file parameters\n"
"trexecmd -w cmd : do the 'which' thing\n"
"trexecmd -l cmd test getline\n"
;
static void Usage(void)
{
fprintf(stderr, "%s: usage:\n%s", thisprog, usage);
exit(1);
}
static int op_flags;
#define OPT_MOINS 0x1
#define OPT_i 0x4
#define OPT_w 0x8
#define OPT_c 0x10
#define OPT_r 0x20
#define OPT_m 0x40
#define OPT_o 0x80
#define OPT_l 0x100
// Data sink for data coming out of the command. We also use it to set
// a cancellation after a moment.
class MEAdv : public ExecCmdAdvise {
public:
void newData(int cnt) {
if (op_flags & OPT_c) {
#ifdef BUILDING_RECOLL
static int callcnt;
if (callcnt++ == 10) {
// Just sets the cancellation flag
CancelCheck::instance().setCancel();
// Would be called from somewhere else and throws an
// exception. We call it here for simplicity
CancelCheck::instance().checkCancel();
}
#endif
}
cerr << "newData(" << cnt << ")" << endl;
}
};
// Data provider, used if the -i flag is set
class MEPv : public ExecCmdProvide {
public:
FILE *m_fp;
string *m_input;
MEPv(string *i)
: m_input(i) {
m_fp = fopen("/etc/group", "r");
}
~MEPv() {
if (m_fp) {
fclose(m_fp);
}
}
void newData() {
char line[1024];
if (m_fp && fgets(line, 1024, m_fp)) {
m_input->assign((const char *)line);
} else {
m_input->erase();
}
}
};
ReExec reexec;
int main(int argc, char *argv[])
{
reexec.init(argc, argv);
if (0) {
// Disabled: For testing reexec arg handling
vector<string> newargs;
newargs.push_back("newarg");
newargs.push_back("newarg1");
newargs.push_back("newarg2");
newargs.push_back("newarg3");
newargs.push_back("newarg4");
reexec.insertArgs(newargs, 2);
}
thisprog = argv[0];
argc--;
argv++;
while (argc > 0 && **argv == '-') {
(*argv)++;
if (!(**argv))
/* Cas du "adb - core" */
{
Usage();
}
while (**argv)
switch (*(*argv)++) {
case 'c':
op_flags |= OPT_c;
break;
case 'r':
op_flags |= OPT_r;
break;
case 'w':
op_flags |= OPT_w;
break;
#ifdef BUILDING_RECOLL
case 'm':
op_flags |= OPT_m;
break;
#endif
case 'i':
op_flags |= OPT_i;
break;
case 'l':
op_flags |= OPT_l;
break;
case 'o':
op_flags |= OPT_o;
break;
default:
Usage();
break;
}
argc--;
argv++;
}
if (argc < 1) {
Usage();
}
string arg1 = *argv++;
argc--;
vector<string> l;
while (argc > 0) {
l.push_back(*argv++);
argc--;
}
#ifdef BUILDING_RECOLL
DebugLog::getdbl()->setloglevel(DEBDEB1);
DebugLog::setfilename("stderr");
#endif
signal(SIGPIPE, SIG_IGN);
if (op_flags & OPT_r) {
// Test reexec. Normally only once, next time we fall through
// because we remove the -r option (only works if it was isolated, not like -rc
chdir("/");
argv[0] = strdup("");
sleep(1);
cerr << "Calling reexec\n";
// We remove the -r arg from list, otherwise we are going to
// loop (which you can try by commenting out the following
// line)
reexec.removeArg("-r");
reexec.reexec();
}
if (op_flags & OPT_w) {
// Test "which" method
string path;
if (ExecCmd::which(arg1, path)) {
cout << path << endl;
return 0;
}
return 1;
#ifdef BUILDING_RECOLL
} else if (op_flags & OPT_m) {
if (l.size() < 2) {
Usage();
}
string mimetype = l[0];
l.erase(l.begin());
return exercise_mhexecm(arg1, mimetype, l) ? 0 : 1;
#endif
} else if (op_flags & OPT_l) {
ExecCmd mexec;
if (mexec.startExec(arg1, l, false, true) < 0) {
cerr << "Startexec failed\n";
exit(1);
}
string output;
int ret = mexec.getline(output, 2);
cerr << "Got ret " << ret << " output " << output << endl;
cerr << "Waiting\n";
int status = mexec.wait();
cerr << "Got status " << status << endl;
exit(status);
} else {
// Default: execute command line arguments
ExecCmd mexec;
// Set callback to be called whenever there is new data
// available and at a periodic interval, to check for
// cancellation
MEAdv adv;
mexec.setAdvise(&adv);
mexec.setTimeout(5);
// Stderr output goes there
mexec.setStderr("/tmp/trexecStderr");
// A few environment variables. Check with trexecmd env
mexec.putenv("TESTVARIABLE1=TESTVALUE1");
mexec.putenv("TESTVARIABLE2=TESTVALUE2");
mexec.putenv("TESTVARIABLE3=TESTVALUE3");
string input, output;
MEPv pv(&input);
string *ip = 0;
if (op_flags & OPT_i) {
ip = &input;
mexec.setProvide(&pv);
}
string *op = 0;
if (op_flags & OPT_o) {
op = &output;
}
int status = -1;
try {
status = mexec.doexec(arg1, l, ip, op);
} catch (...) {
cerr << "CANCELLED" << endl;
}
fprintf(stderr, "Status: 0x%x\n", status);
if (op_flags & OPT_o) {
cout << output;
}
exit(status >> 8);
}
}
#endif // TEST