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  • Committer: Teddy Hogeborn
  • Date: 2024-11-17 17:28:47 UTC
  • mto: This revision was merged to the branch mainline in revision 412.
  • Revision ID: teddy@recompile.se-20241117172847-3bon1o16owybrmoo
mandos: Make configured network socket non-inheritable

If we are passed a pre-created created network socket as a file
descriptor, we should make it non-inheritable to checkers and other
subprocesses.

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Lines of Context:
plugins.d/askpass-fifo.c
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/*
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 * Askpass-FIFO - Read a password from a FIFO and output it
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 * 
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 * Copyright © 2008-2018 Teddy Hogeborn
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 * Copyright © 2008-2018 Björn Påhlsson
 
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 * Copyright © 2008-2019, 2021 Teddy Hogeborn
 
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 * Copyright © 2008-2019, 2021 Björn Påhlsson
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 * 
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 * This file is part of Mandos.
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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() */
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#include <sys/types.h>          /* uid_t, gid_t, ssize_t */
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#include <sys/stat.h>           /* mkfifo(), S_IRUSR, S_IWUSR */
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#include <iso646.h>             /* and */
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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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#include <sys/types.h>          /* uid_t, gid_t, getuid(), getgid(),
 
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                                   setgid(), setuid() */
 
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#include <unistd.h>             /* uid_t, gid_t, ssize_t, getuid(),
 
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                                   getgid(), setgid(), setuid(),
 
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                                   read(), close(), write(),
 
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                                   STDOUT_FILENO */
 
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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() */
 
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#include <errno.h>              /* program_invocation_short_name,
 
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                                   errno, EACCES, ENOTDIR, ELOOP,
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                                   ENAMETOOLONG, ENOSPC, EROFS,
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                                   ENOENT, EEXIST, EFAULT, EMFILE,
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                                   ENFILE, ENOMEM, EBADF, EINVAL, EIO,
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                                   EISDIR, EFBIG */
 
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#include <string.h>             /* strerror() */
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#include <error.h>              /* error() */
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#include <stdio.h>              /* fprintf(), vfprintf(),
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                                   vasprintf() */
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#include <stdlib.h>             /* EXIT_FAILURE, NULL, size_t, free(),
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                                   realloc(), EXIT_SUCCESS */
 
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#include <stdlib.h>             /* free(), realloc(), EXIT_SUCCESS */
 
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#include <sys/stat.h>           /* mkfifo(), S_IRUSR, S_IWUSR */
 
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#include <sysexits.h>           /* EX_OSFILE, EX_OSERR,
 
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                                   EX_UNAVAILABLE, EX_IOERR */
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#include <fcntl.h>              /* open(), O_RDONLY */
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#include <unistd.h>             /* read(), close(), write(),
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                                   STDOUT_FILENO */
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#include <sysexits.h>           /* EX_OSERR, EX_OSFILE,
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                                   EX_UNAVAILABLE, EX_IOERR */
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#include <string.h>             /* strerror() */
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#include <stdarg.h>             /* va_list, va_start(), ... */
 
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#include <stddef.h>             /* NULL, size_t */
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uid_t uid = 65534;
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gid_t gid = 65534;
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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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    if(status){
 
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      __builtin_unreachable();
 
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    }
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    return;
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  }
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  fprintf(stderr, "Mandos plugin ");
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  error(status, errnum, "%s", text);
 
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  if(status){
 
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    __builtin_unreachable();
 
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  }
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  free(text);
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}
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    case ENOTDIR:
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    case ELOOP:
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      error_plus(EX_OSFILE, errno, "mkfifo");
 
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      __builtin_unreachable();
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    case ENAMETOOLONG:
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    case ENOSPC:
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    case EROFS:
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    default:
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      error_plus(EX_OSERR, errno, "mkfifo");
 
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      __builtin_unreachable();
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    case ENOENT:
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      /* no "/lib/cryptsetup"? */
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      error_plus(EX_UNAVAILABLE, errno, "mkfifo");
 
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      __builtin_unreachable();
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    case EEXIST:
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      break;                    /* not an error */
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    }