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- Committer: Björn Påhlsson
- Date: 2010-10-02 16:57:03 UTC
- mfrom: (24.1.168 mandos)
- mto: (24.1.170 mandos) (237.4.29 release)
- mto: This revision was merged to the branch mainline in revision 453.
- Revision ID: belorn@fukt.bsnet.se-20101002165703-u41e3cdyj12t728p
Merge from trunk. Just a minor release to make it lintian clean.
- files added:
- initramfs-tools-hook-conf
- files removed:
- bugs.xml
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
plugins.d/password-prompt.c
2
2
/*
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3
* Password-prompt - Read a password from the terminal and print it
4
4
*
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* Copyright © 2008-2019 Teddy Hogeborn
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* Copyright © 2008-2019 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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* Copyright © 2008-2010 Teddy Hogeborn
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* Copyright © 2008-2010 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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* WITHOUT ANY WARRANTY; without even the implied warranty of
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15
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16
* 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 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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*
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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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*/
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#define _GNU_SOURCE /* getline(), asprintf() */
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#define _GNU_SOURCE /* getline() */
27
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28
#include <termios.h> /* struct termios, tcsetattr(),
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#include <termios.h> /* struct termios, tcsetattr(),
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28
TCSAFLUSH, tcgetattr(), ECHO */
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29
#include <unistd.h> /* struct termios, tcsetattr(),
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30
STDIN_FILENO, TCSAFLUSH,
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tcgetattr(), ECHO, readlink() */
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tcgetattr(), ECHO */
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#include <signal.h> /* sig_atomic_t, raise(), struct
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sigaction, sigemptyset(),
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34
sigaction(), sigaddset(), SIGINT,
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SIGQUIT, SIGHUP, SIGTERM,
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raise() */
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#include <stddef.h> /* NULL, size_t, ssize_t */
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#include <sys/types.h> /* ssize_t, struct dirent, pid_t,
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ssize_t, open() */
38
#include <sys/types.h> /* ssize_t */
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#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
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getenv(), free() */
43
#include <dirent.h> /* scandir(), alphasort() */
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getenv() */
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#include <stdio.h> /* fprintf(), stderr, getline(),
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stdin, feof(), fputc(), vfprintf(),
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vasprintf() */
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stdin, feof(), fputc()
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*/
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#include <errno.h> /* errno, EBADF, ENOTTY, EINVAL,
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EFAULT, EFBIG, EIO, ENOSPC, EINTR
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46
*/
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#include <error.h> /* error() */
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#include <iso646.h> /* or, not */
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#include <stdbool.h> /* bool, false, true */
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#include <inttypes.h> /* strtoumax() */
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#include <sys/stat.h> /* struct stat, lstat(), open() */
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#include <string.h> /* strlen, rindex, memcmp, strerror()
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*/
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#include <string.h> /* strlen, rindex */
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#include <argp.h> /* struct argp_option, struct
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argp_state, struct argp,
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argp_parse(), error_t,
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ARGP_ERR_UNKNOWN */
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#include <sysexits.h> /* EX_SOFTWARE, EX_OSERR,
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EX_UNAVAILABLE, EX_IOERR, EX_OK */
64
#include <fcntl.h> /* open() */
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#include <stdarg.h> /* va_list, va_start(), ... */
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58
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volatile sig_atomic_t quit_now = 0;
68
60
int signal_received;
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bool debug = false;
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const char *argp_program_version = "password-prompt " VERSION;
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const char *argp_program_bug_address = "<mandos@recompile.se>";
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/* Needed for conflict resolution */
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const char plymouth_name[] = "plymouthd";
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/* Function to use when printing errors */
77
__attribute__((format (gnu_printf, 3, 4)))
78
void error_plus(int status, int errnum, const char *formatstring,
79
...){
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va_list ap;
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char *text;
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int ret;
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va_start(ap, formatstring);
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ret = vasprintf(&text, formatstring, ap);
86
if(ret == -1){
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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, ": %s\n", strerror(errnum));
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error(status, errno, "vasprintf while printing error");
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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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free(text);
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}
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const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
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static void termination_handler(int signum){
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66
if(quit_now){
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70
signal_received = signum;
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71
}
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72
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bool conflict_detection(void){
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/* plymouth conflicts with password-prompt since both want to read
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from the terminal. Password-prompt will exit if it detects
111
plymouth since plymouth performs the same functionality.
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*/
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__attribute__((nonnull))
114
int is_plymouth(const struct dirent *proc_entry){
115
int ret;
116
int cl_fd;
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{
118
uintmax_t proc_id;
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char *tmp;
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errno = 0;
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proc_id = strtoumax(proc_entry->d_name, &tmp, 10);
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if(errno != 0 or *tmp != '\0'
124
or proc_id != (uintmax_t)((pid_t)proc_id)){
125
return 0;
126
}
127
}
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129
char *cmdline_filename;
130
ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
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proc_entry->d_name);
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if(ret == -1){
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error_plus(0, errno, "asprintf");
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return 0;
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}
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/* Open /proc/<pid>/cmdline */
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cl_fd = open(cmdline_filename, O_RDONLY);
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free(cmdline_filename);
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if(cl_fd == -1){
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if(errno != ENOENT){
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error_plus(0, errno, "open");
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}
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return 0;
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}
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char *cmdline = NULL;
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{
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size_t cmdline_len = 0;
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size_t cmdline_allocated = 0;
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char *tmp;
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const size_t blocksize = 1024;
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ssize_t sret;
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do {
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/* Allocate more space? */
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if(cmdline_len + blocksize + 1 > cmdline_allocated){
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tmp = realloc(cmdline, cmdline_allocated + blocksize + 1);
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if(tmp == NULL){
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error_plus(0, errno, "realloc");
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free(cmdline);
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close(cl_fd);
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return 0;
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}
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cmdline = tmp;
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cmdline_allocated += blocksize;
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}
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/* Read data */
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sret = read(cl_fd, cmdline + cmdline_len,
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cmdline_allocated - cmdline_len);
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if(sret == -1){
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error_plus(0, errno, "read");
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free(cmdline);
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close(cl_fd);
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return 0;
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}
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cmdline_len += (size_t)sret;
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} while(sret != 0);
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ret = close(cl_fd);
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if(ret == -1){
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error_plus(0, errno, "close");
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free(cmdline);
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return 0;
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}
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cmdline[cmdline_len] = '\0'; /* Make sure it is terminated */
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}
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/* we now have cmdline */
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/* get basename */
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char *cmdline_base = strrchr(cmdline, '/');
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if(cmdline_base != NULL){
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cmdline_base += 1; /* skip the slash */
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} else {
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cmdline_base = cmdline;
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}
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if(strcmp(cmdline_base, plymouth_name) != 0){
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if(debug){
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fprintf(stderr, "\"%s\" is not \"%s\"\n", cmdline_base,
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plymouth_name);
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}
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free(cmdline);
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return 0;
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}
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if(debug){
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fprintf(stderr, "\"%s\" equals \"%s\"\n", cmdline_base,
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plymouth_name);
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}
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free(cmdline);
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return 1;
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}
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struct dirent **direntries = NULL;
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int ret;
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ret = scandir("/proc", &direntries, is_plymouth, alphasort);
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if(ret == -1){
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error_plus(1, errno, "scandir");
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}
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{
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int i = ret;
221
while(i--){
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free(direntries[i]);
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}
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}
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free(direntries);
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return ret > 0;
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}
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int main(int argc, char **argv){
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ssize_t sret;
232
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int ret;
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100
{ .name = NULL }
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};
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__attribute__((nonnull(3)))
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error_t parse_opt (int key, char *arg, struct argp_state *state){
262
104
errno = 0;
263
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switch (key){
274
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argp_state_help(state, state->out_stream,
275
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(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
276
118
& ~(unsigned int)ARGP_HELP_EXIT_OK);
277
__builtin_unreachable();
278
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case -3: /* --usage */
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argp_state_help(state, state->out_stream,
280
121
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
281
__builtin_unreachable();
282
122
case 'V': /* --version */
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fprintf(state->out_stream, "%s\n", argp_program_version);
284
124
exit(argp_err_exit_status);
301
141
case ENOMEM:
302
142
default:
303
143
errno = ret;
304
error_plus(0, errno, "argp_parse");
144
error(0, errno, "argp_parse");
305
145
return EX_OSERR;
306
146
case EINVAL:
307
147
return EX_USAGE;
311
151
if(debug){
312
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fprintf(stderr, "Starting %s\n", argv[0]);
313
153
}
314
315
if(conflict_detection()){
316
if(debug){
317
fprintf(stderr, "Stopping %s because of conflict\n", argv[0]);
318
}
319
return EXIT_FAILURE;
320
}
321
322
154
if(debug){
323
155
fprintf(stderr, "Storing current terminal attributes\n");
324
156
}
325
157
326
158
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
327
159
int e = errno;
328
error_plus(0, errno, "tcgetattr");
160
error(0, errno, "tcgetattr");
329
161
switch(e){
330
162
case EBADF:
331
163
case ENOTTY:
338
170
sigemptyset(&new_action.sa_mask);
339
171
ret = sigaddset(&new_action.sa_mask, SIGINT);
340
172
if(ret == -1){
341
error_plus(0, errno, "sigaddset");
173
error(0, errno, "sigaddset");
342
174
return EX_OSERR;
343
175
}
344
176
ret = sigaddset(&new_action.sa_mask, SIGHUP);
345
177
if(ret == -1){
346
error_plus(0, errno, "sigaddset");
178
error(0, errno, "sigaddset");
347
179
return EX_OSERR;
348
180
}
349
181
ret = sigaddset(&new_action.sa_mask, SIGTERM);
350
182
if(ret == -1){
351
error_plus(0, errno, "sigaddset");
183
error(0, errno, "sigaddset");
352
184
return EX_OSERR;
353
185
}
354
186
/* Need to check if the handler is SIG_IGN before handling:
357
189
*/
358
190
ret = sigaction(SIGINT, NULL, &old_action);
359
191
if(ret == -1){
360
error_plus(0, errno, "sigaction");
192
error(0, errno, "sigaction");
361
193
return EX_OSERR;
362
194
}
363
195
if(old_action.sa_handler != SIG_IGN){
364
196
ret = sigaction(SIGINT, &new_action, NULL);
365
197
if(ret == -1){
366
error_plus(0, errno, "sigaction");
198
error(0, errno, "sigaction");
367
199
return EX_OSERR;
368
200
}
369
201
}
370
202
ret = sigaction(SIGHUP, NULL, &old_action);
371
203
if(ret == -1){
372
error_plus(0, errno, "sigaction");
204
error(0, errno, "sigaction");
373
205
return EX_OSERR;
374
206
}
375
207
if(old_action.sa_handler != SIG_IGN){
376
208
ret = sigaction(SIGHUP, &new_action, NULL);
377
209
if(ret == -1){
378
error_plus(0, errno, "sigaction");
210
error(0, errno, "sigaction");
379
211
return EX_OSERR;
380
212
}
381
213
}
382
214
ret = sigaction(SIGTERM, NULL, &old_action);
383
215
if(ret == -1){
384
error_plus(0, errno, "sigaction");
216
error(0, errno, "sigaction");
385
217
return EX_OSERR;
386
218
}
387
219
if(old_action.sa_handler != SIG_IGN){
388
220
ret = sigaction(SIGTERM, &new_action, NULL);
389
221
if(ret == -1){
390
error_plus(0, errno, "sigaction");
222
error(0, errno, "sigaction");
391
223
return EX_OSERR;
392
224
}
393
225
}
401
233
t_new.c_lflag &= ~(tcflag_t)ECHO;
402
234
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
403
235
int e = errno;
404
error_plus(0, errno, "tcsetattr-echo");
236
error(0, errno, "tcsetattr-echo");
405
237
switch(e){
406
238
case EBADF:
407
239
case ENOTTY:
471
303
sret = write(STDOUT_FILENO, buffer + written, n - written);
472
304
if(sret < 0){
473
305
int e = errno;
474
error_plus(0, errno, "write");
306
error(0, errno, "write");
475
307
switch(e){
476
308
case EBADF:
477
309
case EFAULT:
493
325
sret = close(STDOUT_FILENO);
494
326
if(sret == -1){
495
327
int e = errno;
496
error_plus(0, errno, "close");
328
error(0, errno, "close");
497
329
switch(e){
498
330
case EBADF:
499
331
status = EX_OSFILE;
509
341
if(sret < 0){
510
342
int e = errno;
511
343
if(errno != EINTR and not feof(stdin)){
512
error_plus(0, errno, "getline");
344
error(0, errno, "getline");
513
345
switch(e){
514
346
case EBADF:
515
347
status = EX_UNAVAILABLE;
516
break;
517
348
case EIO:
518
349
case EINVAL:
519
350
default:
523
354
break;
524
355
}
525
356
}
526
/* if(sret == 0), then the only sensible thing to do is to retry
527
to read from stdin */
357
/* if(sret == 0), then the only sensible thing to do is to retry to
358
read from stdin */
528
359
fputc('\n', stderr);
529
360
if(debug and not quit_now){
530
361
/* If quit_now is nonzero, we were interrupted by a signal, and
539
370
fprintf(stderr, "Restoring terminal attributes\n");
540
371
}
541
372
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
542
error_plus(0, errno, "tcsetattr+echo");
373
error(0, errno, "tcsetattr+echo");
543
374
}
544
375
545
376
if(quit_now){
547
378
old_action.sa_handler = SIG_DFL;
548
379
ret = sigaction(signal_received, &old_action, NULL);
549
380
if(ret == -1){
550
error_plus(0, errno, "sigaction");
381
error(0, errno, "sigaction");
551
382
}
552
383
raise(signal_received);
553
384
}
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Version: 2.0.2.dev0