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- Committer: Teddy Hogeborn
- Date: 2018-02-06 20:03:50 UTC
- Revision ID: teddy@recompile.se-20180206200350-jzvorueb731xkph3
Update Debian Debhelper compatibility version.
* (debian/compat): Change to "10".
* (debian/compat): Change to "10".
added
removed
plugin-runner.c
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
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*
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* Copyright © 2008-2014 Teddy Hogeborn
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* Copyright © 2008-2014 Björn Påhlsson
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*
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* This program is free software: you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* Copyright © 2008-2017 Teddy Hogeborn
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* Copyright © 2008-2017 Björn Påhlsson
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*
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* This file is part of Mandos.
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*
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* Mandos is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Mandos is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see
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* <http://www.gnu.org/licenses/>.
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* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
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*
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* Contact the authors at <mandos@recompile.se>.
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*/
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#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
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FD_SET(), FD_ISSET(), FD_CLR */
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#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
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WEXITSTATUS(), WTERMSIG(),
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WCOREDUMP() */
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WEXITSTATUS(), WTERMSIG() */
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#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
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#include <iso646.h> /* and, or, not */
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#include <dirent.h> /* struct dirent, scandirat() */
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__attribute__((nonnull))
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static void free_plugin(plugin *plugin_node){
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free(plugin_node->name);
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for(char **arg = plugin_node->argv; *arg != NULL; arg++){
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free(*arg);
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}
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custom_argc += 1;
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{
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char **new_argv = realloc(custom_argv, sizeof(char *)
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* ((unsigned int)
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custom_argc + 1));
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* ((size_t)custom_argc + 1));
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if(new_argv == NULL){
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error(0, errno, "realloc");
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exitstatus = EX_OSERR;
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}
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if(debug){
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for(plugin *p = plugin_list; p != NULL; p=p->next){
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for(plugin *p = plugin_list; p != NULL; p = p->next){
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fprintf(stderr, "Plugin: %s has %d arguments\n",
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p->name ? p->name : "Global", p->argc - 1);
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for(char **a = p->argv; *a != NULL; a++){
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809
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if(getuid() == 0){
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/* Work around Debian bug #633582:
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<http://bugs.debian.org/633582> */
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<https://bugs.debian.org/633582> */
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int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
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if(plugindir_fd == -1){
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if(errno != ENOENT){
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}
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}
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}
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TEMP_FAILURE_RETRY(close(plugindir_fd));
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close(plugindir_fd);
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}
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}
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return 1;
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}
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#ifdef __GLIBC__
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#if __GLIBC_PREREQ(2, 15)
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int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
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alphasort);
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#else /* not __GLIBC_PREREQ(2, 15) */
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int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
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&direntries, good_name, alphasort);
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#endif /* not __GLIBC_PREREQ(2, 15) */
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#else /* not __GLIBC__ */
904
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
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&direntries, good_name, alphasort);
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#endif /* not __GLIBC__ */
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if(numplugins == -1){
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error(0, errno, "Could not scan plugin dir");
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direntries = NULL;
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ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
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if(ret == -1){
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error(0, errno, "stat");
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TEMP_FAILURE_RETRY(close(plugin_fd));
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close(plugin_fd);
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free(direntries[i]);
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continue;
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921
}
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plugindir != NULL ? plugindir : PDIR,
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direntries[i]->d_name);
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}
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TEMP_FAILURE_RETRY(close(plugin_fd));
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close(plugin_fd);
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free(direntries[i]);
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continue;
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}
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plugin *p = getplugin(direntries[i]->d_name);
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if(p == NULL){
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error(0, errno, "getplugin");
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TEMP_FAILURE_RETRY(close(plugin_fd));
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close(plugin_fd);
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free(direntries[i]);
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continue;
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}
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fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
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direntries[i]->d_name);
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}
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TEMP_FAILURE_RETRY(close(plugin_fd));
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close(plugin_fd);
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free(direntries[i]);
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continue;
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}
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if(pipefd[0] >= FD_SETSIZE){
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fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
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FD_SETSIZE);
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TEMP_FAILURE_RETRY(close(pipefd[0]));
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TEMP_FAILURE_RETRY(close(pipefd[1]));
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close(pipefd[0]);
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close(pipefd[1]);
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exitstatus = EX_OSERR;
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free(direntries[i]);
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goto fallback;
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ret = set_cloexec_flag(pipefd[0]);
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if(ret < 0){
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error(0, errno, "set_cloexec_flag");
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TEMP_FAILURE_RETRY(close(pipefd[0]));
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TEMP_FAILURE_RETRY(close(pipefd[1]));
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close(pipefd[0]);
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close(pipefd[1]);
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exitstatus = EX_OSERR;
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free(direntries[i]);
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goto fallback;
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ret = set_cloexec_flag(pipefd[1]);
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if(ret < 0){
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error(0, errno, "set_cloexec_flag");
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TEMP_FAILURE_RETRY(close(pipefd[0]));
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TEMP_FAILURE_RETRY(close(pipefd[1]));
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close(pipefd[0]);
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close(pipefd[1]);
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exitstatus = EX_OSERR;
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free(direntries[i]);
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goto fallback;
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error(0, errno, "fork");
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TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
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&sigchld_action.sa_mask, NULL));
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TEMP_FAILURE_RETRY(close(pipefd[0]));
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TEMP_FAILURE_RETRY(close(pipefd[1]));
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close(pipefd[0]);
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close(pipefd[1]);
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exitstatus = EX_OSERR;
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free(direntries[i]);
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goto fallback;
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/* no return */
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}
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/* Parent process */
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TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
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pipe */
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TEMP_FAILURE_RETRY(close(plugin_fd));
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close(pipefd[1]); /* Close unused write end of pipe */
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close(plugin_fd);
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plugin *new_plugin = getplugin(direntries[i]->d_name);
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if(new_plugin == NULL){
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error(0, errno, "getplugin");
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goto fallback;
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}
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#if defined (__GNUC__) and defined (__GLIBC__)
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#if not __GLIBC_PREREQ(2, 16)
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wsign-conversion"
1123
#endif
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#endif
1125
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
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-Wconversion in GNU libc
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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
1108
FD_SET(new_plugin->fd, &rfds_all);
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1109
1134
1110
if(maxfd < new_plugin->fd){
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1111
maxfd = new_plugin->fd;
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1114
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free(direntries);
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direntries = NULL;
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TEMP_FAILURE_RETRY(close(dir_fd));
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close(dir_fd);
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dir_fd = -1;
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free_plugin(getplugin(NULL));
1144
1120
1184
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(intmax_t) (proc->pid),
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WTERMSIG(proc->status),
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strsignal(WTERMSIG(proc->status)));
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} else if(WCOREDUMP(proc->status)){
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fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
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" core\n", proc->name, (intmax_t) (proc->pid));
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1163
}
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}
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/* 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
1167
FD_CLR(proc->fd, &rfds_all);
1208
1168
1209
1169
/* Block signal while modifying process_list */
1210
1170
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1250
1210
}
1251
1211
1252
1212
/* 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
1213
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1270
1214
/* This process had nothing to say at this time */
1271
1215
proc = proc->next;
1272
1216
continue;
1342
1286
free(direntries);
1343
1287
1344
1288
if(dir_fd != -1){
1345
TEMP_FAILURE_RETRY(close(dir_fd));
1289
close(dir_fd);
1346
1290
}
1347
1291
1348
1292
/* Kill the processes */
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0