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  • Committer: Teddy Hogeborn
  • Date: 2024-09-09 04:24:39 UTC
  • Revision ID: teddy@recompile.se-20240909042439-j85mr20uli2hnyis
Eliminate compiler warnings

Many programs use nested functions, which now result in a linker
warning about executable stack.  Hide this warning.  Also, rewrite a
loop in the plymouth plugin to avoid warning about signed overflow.
This change also makes the plugin pick the alphabetically first
process entry instead of the last, in case many plymouth processes are
found (which should be unlikely).

* Makefile (plugin-runner, dracut-module/password-agent,
  plugins.d/password-prompt, plugins.d/mandos-client,
  plugins.d/plymouth): New target; set LDFLAGS to add "-Xlinker
  --no-warn-execstack".
* plugins.d/plymouth.c (get_pid): When no pid files are found, and we
  are looking through the process list, go though it from the start
  instead of from the end, i.e. in normal alphabetical order and not
  in reverse order.

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plugins.d/splashy.c
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/*
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 * Splashy - Read a password from splashy and output it
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 * 
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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 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 © 2008-2018, 2021-2022 Teddy Hogeborn
 
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 * Copyright © 2008-2018, 2021-2022 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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#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 <stdlib.h>             /* getenv() */
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#include <stdio.h>              /* asprintf(), vasprintf(), vprintf(),
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                                   fprintf() */
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#include <stdlib.h>             /* EXIT_FAILURE, free(),
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                                   EXIT_SUCCESS */
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#include <sys/types.h>          /* pid_t, DIR, struct dirent,
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                                   ssize_t */
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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 <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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                                   pause() */
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#include <string.h>             /* memcmp(), strerror() */
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#include <errno.h>              /* errno, EACCES, ENOTDIR, ELOOP,
 
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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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                                   ECHILD */
 
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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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#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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                                   EX_UNAVAILABLE */
 
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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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                                   execl(), _exit(),
 
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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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                                   SIG_DFL, raise() */
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#include <sys/wait.h>           /* waitpid(), WIFEXITED(),
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                                   WEXITSTATUS() */
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#include <sysexits.h>           /* EX_OSERR, EX_OSFILE,
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                                   EX_UNAVAILABLE */
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#include <stdarg.h>             /* va_list, va_start(), ... */
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sig_atomic_t interrupted_by_signal = 0;
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int signal_received;