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  • Committer: Teddy Hogeborn
  • Date: 2016-10-08 06:27:36 UTC
  • mfrom: (355 release)
  • mto: (237.7.594 trunk)
  • mto: This revision was merged to the branch mainline in revision 356.
  • Revision ID: teddy@recompile.se-20161008062736-lv87nar2ud9973h3
Merge from release branch

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plugin-runner.c
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/*
3
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 * Mandos plugin runner - Run Mandos plugins
4
4
 *
5
 
 * Copyright © 2008-2014 Teddy Hogeborn
6
 
 * Copyright © 2008-2014 Björn Påhlsson
 
5
 * Copyright © 2008-2016 Teddy Hogeborn
 
6
 * Copyright © 2008-2016 Björn Påhlsson
7
7
 * 
8
8
 * This program is free software: you can redistribute it and/or
9
9
 * modify it under the terms of the GNU General Public License as
37
37
#include <sys/select.h>         /* fd_set, select(), FD_ZERO(),
38
38
                                   FD_SET(), FD_ISSET(), FD_CLR */
39
39
#include <sys/wait.h>           /* wait(), waitpid(), WIFEXITED(),
40
 
                                   WEXITSTATUS(), WTERMSIG(),
41
 
                                   WCOREDUMP() */
 
40
                                   WEXITSTATUS(), WTERMSIG() */
42
41
#include <sys/stat.h>           /* struct stat, fstat(), S_ISREG() */
43
42
#include <iso646.h>             /* and, or, not */
44
43
#include <dirent.h>             /* struct dirent, scandirat() */
701
700
        custom_argc += 1;
702
701
        {
703
702
          char **new_argv = realloc(custom_argv, sizeof(char *)
704
 
                                    * ((unsigned int)
705
 
                                       custom_argc + 1));
 
703
                                    * ((size_t)custom_argc + 1));
706
704
          if(new_argv == NULL){
707
705
            error(0, errno, "realloc");
708
706
            exitstatus = EX_OSERR;
809
807
  
810
808
  if(getuid() == 0){
811
809
    /* Work around Debian bug #633582:
812
 
       <http://bugs.debian.org/633582> */
 
810
       <https://bugs.debian.org/633582> */
813
811
    int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
814
812
    if(plugindir_fd == -1){
815
813
      if(errno != ENOENT){
827
825
          }
828
826
        }
829
827
      }
830
 
      TEMP_FAILURE_RETRY(close(plugindir_fd));
 
828
      close(plugindir_fd);
831
829
    }
832
830
  }
833
831
  
892
890
    return 1;
893
891
  }
894
892
  
895
 
#ifdef __GLIBC__
896
 
#if __GLIBC_PREREQ(2, 15)
897
893
  int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
898
894
                             alphasort);
899
 
#else  /* not __GLIBC_PREREQ(2, 15) */
900
 
  int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
901
 
                           &direntries, good_name, alphasort);
902
 
#endif  /* not __GLIBC_PREREQ(2, 15) */
903
 
#else   /* not __GLIBC__ */
904
 
  int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
905
 
                           &direntries, good_name, alphasort);
906
 
#endif  /* not __GLIBC__ */
907
895
  if(numplugins == -1){
908
896
    error(0, errno, "Could not scan plugin dir");
909
897
    direntries = NULL;
925
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    ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
926
914
    if(ret == -1){
927
915
      error(0, errno, "stat");
928
 
      TEMP_FAILURE_RETRY(close(plugin_fd));
 
916
      close(plugin_fd);
929
917
      free(direntries[i]);
930
918
      continue;
931
919
    }
940
928
                plugindir != NULL ? plugindir : PDIR,
941
929
                direntries[i]->d_name);
942
930
      }
943
 
      TEMP_FAILURE_RETRY(close(plugin_fd));
 
931
      close(plugin_fd);
944
932
      free(direntries[i]);
945
933
      continue;
946
934
    }
948
936
    plugin *p = getplugin(direntries[i]->d_name);
949
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    if(p == NULL){
950
938
      error(0, errno, "getplugin");
951
 
      TEMP_FAILURE_RETRY(close(plugin_fd));
 
939
      close(plugin_fd);
952
940
      free(direntries[i]);
953
941
      continue;
954
942
    }
957
945
        fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
958
946
                direntries[i]->d_name);
959
947
      }
960
 
      TEMP_FAILURE_RETRY(close(plugin_fd));
 
948
      close(plugin_fd);
961
949
      free(direntries[i]);
962
950
      continue;
963
951
    }
1003
991
    if(pipefd[0] >= FD_SETSIZE){
1004
992
      fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1005
993
              FD_SETSIZE);
1006
 
      TEMP_FAILURE_RETRY(close(pipefd[0]));
1007
 
      TEMP_FAILURE_RETRY(close(pipefd[1]));
 
994
      close(pipefd[0]);
 
995
      close(pipefd[1]);
1008
996
      exitstatus = EX_OSERR;
1009
997
      free(direntries[i]);
1010
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      goto fallback;
1014
1002
    ret = set_cloexec_flag(pipefd[0]);
1015
1003
    if(ret < 0){
1016
1004
      error(0, errno, "set_cloexec_flag");
1017
 
      TEMP_FAILURE_RETRY(close(pipefd[0]));
1018
 
      TEMP_FAILURE_RETRY(close(pipefd[1]));
 
1005
      close(pipefd[0]);
 
1006
      close(pipefd[1]);
1019
1007
      exitstatus = EX_OSERR;
1020
1008
      free(direntries[i]);
1021
1009
      goto fallback;
1023
1011
    ret = set_cloexec_flag(pipefd[1]);
1024
1012
    if(ret < 0){
1025
1013
      error(0, errno, "set_cloexec_flag");
1026
 
      TEMP_FAILURE_RETRY(close(pipefd[0]));
1027
 
      TEMP_FAILURE_RETRY(close(pipefd[1]));
 
1014
      close(pipefd[0]);
 
1015
      close(pipefd[1]);
1028
1016
      exitstatus = EX_OSERR;
1029
1017
      free(direntries[i]);
1030
1018
      goto fallback;
1049
1037
      error(0, errno, "fork");
1050
1038
      TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1051
1039
                                     &sigchld_action.sa_mask, NULL));
1052
 
      TEMP_FAILURE_RETRY(close(pipefd[0]));
1053
 
      TEMP_FAILURE_RETRY(close(pipefd[1]));
 
1040
      close(pipefd[0]);
 
1041
      close(pipefd[1]);
1054
1042
      exitstatus = EX_OSERR;
1055
1043
      free(direntries[i]);
1056
1044
      goto fallback;
1084
1072
      /* no return */
1085
1073
    }
1086
1074
    /* Parent process */
1087
 
    TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1088
 
                                             pipe */
1089
 
    TEMP_FAILURE_RETRY(close(plugin_fd));
 
1075
    close(pipefd[1]);           /* Close unused write end of pipe */
 
1076
    close(plugin_fd);
1090
1077
    plugin *new_plugin = getplugin(direntries[i]->d_name);
1091
1078
    if(new_plugin == NULL){
1092
1079
      error(0, errno, "getplugin");
1116
1103
      goto fallback;
1117
1104
    }
1118
1105
    
1119
 
#if defined (__GNUC__) and defined (__GLIBC__)
1120
 
#if not __GLIBC_PREREQ(2, 16)
1121
 
#pragma GCC diagnostic push
1122
 
#pragma GCC diagnostic ignored "-Wsign-conversion"
1123
 
#endif
1124
 
#endif
1125
 
    FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1126
 
                                          -Wconversion in GNU libc
1127
 
                                          before 2.16 */
1128
 
#if defined (__GNUC__) and defined (__GLIBC__)
1129
 
#if not __GLIBC_PREREQ(2, 16)
1130
 
#pragma GCC diagnostic pop
1131
 
#endif
1132
 
#endif
 
1106
    FD_SET(new_plugin->fd, &rfds_all);
1133
1107
    
1134
1108
    if(maxfd < new_plugin->fd){
1135
1109
      maxfd = new_plugin->fd;
1138
1112
  
1139
1113
  free(direntries);
1140
1114
  direntries = NULL;
1141
 
  TEMP_FAILURE_RETRY(close(dir_fd));
 
1115
  close(dir_fd);
1142
1116
  dir_fd = -1;
1143
1117
  free_plugin(getplugin(NULL));
1144
1118
  
1184
1158
                      (intmax_t) (proc->pid),
1185
1159
                      WTERMSIG(proc->status),
1186
1160
                      strsignal(WTERMSIG(proc->status)));
1187
 
            } else if(WCOREDUMP(proc->status)){
1188
 
              fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1189
 
                      " core\n", proc->name, (intmax_t) (proc->pid));
1190
1161
            }
1191
1162
          }
1192
1163
          
1193
1164
          /* Remove the plugin */
1194
 
#if defined (__GNUC__) and defined (__GLIBC__)
1195
 
#if not __GLIBC_PREREQ(2, 16)
1196
 
#pragma GCC diagnostic push
1197
 
#pragma GCC diagnostic ignored "-Wsign-conversion"
1198
 
#endif
1199
 
#endif
1200
 
          FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1201
 
                                          -Wconversion in GNU libc
1202
 
                                          before 2.16 */
1203
 
#if defined (__GNUC__) and defined (__GLIBC__)
1204
 
#if not __GLIBC_PREREQ(2, 16)
1205
 
#pragma GCC diagnostic pop
1206
 
#endif
1207
 
#endif
 
1165
          FD_CLR(proc->fd, &rfds_all);
1208
1166
          
1209
1167
          /* Block signal while modifying process_list */
1210
1168
          ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1250
1208
      }
1251
1209
      
1252
1210
      /* This process has not completed.  Does it have any output? */
1253
 
#if defined (__GNUC__) and defined (__GLIBC__)
1254
 
#if not __GLIBC_PREREQ(2, 16)
1255
 
#pragma GCC diagnostic push
1256
 
#pragma GCC diagnostic ignored "-Wsign-conversion"
1257
 
#endif
1258
 
#endif
1259
 
      if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1260
 
                                                         warning from
1261
 
                                                         -Wconversion
1262
 
                                                         in GNU libc
1263
 
                                                         before
1264
 
                                                         2.16 */
1265
 
#if defined (__GNUC__) and defined (__GLIBC__)
1266
 
#if not __GLIBC_PREREQ(2, 16)
1267
 
#pragma GCC diagnostic pop
1268
 
#endif
1269
 
#endif
 
1211
      if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1270
1212
        /* This process had nothing to say at this time */
1271
1213
        proc = proc->next;
1272
1214
        continue;
1342
1284
  free(direntries);
1343
1285
  
1344
1286
  if(dir_fd != -1){
1345
 
    TEMP_FAILURE_RETRY(close(dir_fd));
 
1287
    close(dir_fd);
1346
1288
  }
1347
1289
  
1348
1290
  /* Kill the processes */