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* Splashy - Read a password from splashy and output it
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* Copyright © 2008-2018, 2021-2022 Teddy Hogeborn
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* Copyright © 2008-2018, 2021-2022 Björn Påhlsson
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* This file is part of Mandos.
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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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* Mandos is distributed in the hope that it will be useful, but
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* Copyright © 2008,2009 Teddy Hogeborn
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* Copyright © 2008,2009 Björn Påhlsson
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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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* This program 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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* You should have received a copy of the GNU General Public License
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* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
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* along with this program. If not, see
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* <http://www.gnu.org/licenses/>.
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* Contact the authors at <mandos@recompile.se>.
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* Contact the authors at <mandos@fukt.bsnet.se>.
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#define _GNU_SOURCE /* vasprintf(),
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program_invocation_short_name,
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asprintf(), TEMP_FAILURE_RETRY() */
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#include <sys/types.h> /* sig_atomic_t, pid_t, setuid(),
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geteuid(), setsid() */
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#include <stdarg.h> /* va_list, va_start(), vfprintf() */
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#include <stdio.h> /* vasprintf(), fprintf(), stderr,
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vfprintf(), asprintf() */
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#include <errno.h> /* program_invocation_short_name,
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errno, EACCES, ENOTDIR, ELOOP,
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ENOENT, ENAMETOOLONG, EMFILE,
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ENFILE, ENOMEM, ENOEXEC, EINVAL,
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E2BIG, EFAULT, EIO, ETXTBSY,
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EISDIR, ELIBBAD, EPERM, EINTR,
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#include <string.h> /* strerror(), memcmp() */
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#include <error.h> /* error() */
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#include <stdlib.h> /* free(), EXIT_FAILURE, getenv(),
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EXIT_SUCCESS, abort() */
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#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
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#include <signal.h> /* sig_atomic_t, struct sigaction,
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sigemptyset(), sigaddset(), SIGINT,
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SIGHUP, SIGTERM, sigaction,
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SIG_IGN, kill(), SIGKILL */
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#include <stddef.h> /* NULL */
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#include <dirent.h> /* DIR, opendir(), struct dirent,
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readdir(), closedir() */
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#include <sysexits.h> /* EX_OSERR, EX_OSFILE,
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#include <stdlib.h> /* getenv() */
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#include <stdio.h> /* asprintf(), perror() */
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#include <stdlib.h> /* EXIT_FAILURE, free(),
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#include <sys/types.h> /* pid_t, DIR, struct dirent,
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#include <dirent.h> /* opendir(), readdir(), closedir() */
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#include <inttypes.h> /* intmax_t, strtoimax() */
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#include <iso646.h> /* or, not, and */
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#include <unistd.h> /* ssize_t, readlink(), fork(),
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TEMP_FAILURE_RETRY(), sleep(),
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setuid(), geteuid(), setsid(),
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chdir(), dup2(), STDERR_FILENO,
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STDOUT_FILENO, pause() */
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#include <sys/stat.h> /* struct stat, lstat(), S_ISLNK() */
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#include <signal.h> /* struct sigaction, sigemptyset(),
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sigaddset(), SIGINT, SIGHUP,
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SIGTERM, SIG_IGN, kill(), SIGKILL,
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#include <sys/stat.h> /* struct stat, lstat(), S_ISLNK */
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#include <iso646.h> /* not, or, and */
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#include <unistd.h> /* readlink(), fork(), execl(),
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sleep(), dup2() STDERR_FILENO,
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STDOUT_FILENO, _exit(),
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#include <string.h> /* memcmp() */
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#include <errno.h> /* errno */
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#include <sys/wait.h> /* waitpid(), WIFEXITED(),
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sig_atomic_t interrupted_by_signal = 0;
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int signal_received;
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/* Function to use when printing errors */
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__attribute__((format (gnu_printf, 3, 4)))
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void error_plus(int status, int errnum, const char *formatstring,
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va_start(ap, formatstring);
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ret = vasprintf(&text, formatstring, ap);
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fprintf(stderr, "Mandos plugin %s: ",
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program_invocation_short_name);
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vfprintf(stderr, formatstring, ap);
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fprintf(stderr, ": ");
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fprintf(stderr, "%s\n", strerror(errnum));
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error(status, errno, "vasprintf while printing error");
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fprintf(stderr, "Mandos plugin ");
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error(status, errnum, "%s", text);
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static void termination_handler(int signum){
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if(interrupted_by_signal){
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sigemptyset(&new_action.sa_mask);
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ret = sigaddset(&new_action.sa_mask, SIGINT);
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error_plus(0, errno, "sigaddset");
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exitstatus = EX_OSERR;
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ret = sigaddset(&new_action.sa_mask, SIGHUP);
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error_plus(0, errno, "sigaddset");
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exitstatus = EX_OSERR;
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ret = sigaddset(&new_action.sa_mask, SIGTERM);
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error_plus(0, errno, "sigaddset");
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exitstatus = EX_OSERR;
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ret = sigaction(SIGINT, NULL, &old_action);
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error_plus(0, errno, "sigaction");
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exitstatus = EX_OSERR;
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if(old_action.sa_handler != SIG_IGN){
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ret = sigaction(SIGINT, &new_action, NULL);
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error_plus(0, errno, "sigaction");
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exitstatus = EX_OSERR;
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ret = sigaction(SIGHUP, NULL, &old_action);
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error_plus(0, errno, "sigaction");
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exitstatus = EX_OSERR;
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if(old_action.sa_handler != SIG_IGN){
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ret = sigaction(SIGHUP, &new_action, NULL);
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error_plus(0, errno, "sigaction");
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exitstatus = EX_OSERR;
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ret = sigaction(SIGTERM, NULL, &old_action);
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error_plus(0, errno, "sigaction");
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exitstatus = EX_OSERR;
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if(old_action.sa_handler != SIG_IGN){
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ret = sigaction(SIGTERM, &new_action, NULL);
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error_plus(0, errno, "sigaction");
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exitstatus = EX_OSERR;
added
removed
plugins.d/splashy.c
