19
19
* along with this program. If not, see
20
20
* <http://www.gnu.org/licenses/>.
22
* Contact the authors at <mandos@recompile.se>.
22
* Contact the authors at <mandos@fukt.bsnet.se>.
25
#define _GNU_SOURCE /* getline(), asprintf() */
25
#define _GNU_SOURCE /* getline() */
27
#include <termios.h> /* struct termios, tcsetattr(),
27
#include <termios.h> /* struct termios, tcsetattr(),
28
28
TCSAFLUSH, tcgetattr(), ECHO */
29
29
#include <unistd.h> /* struct termios, tcsetattr(),
30
30
STDIN_FILENO, TCSAFLUSH,
31
tcgetattr(), ECHO, readlink() */
32
32
#include <signal.h> /* sig_atomic_t, raise(), struct
33
33
sigaction, sigemptyset(),
34
34
sigaction(), sigaddset(), SIGINT,
35
35
SIGQUIT, SIGHUP, SIGTERM,
37
37
#include <stddef.h> /* NULL, size_t, ssize_t */
38
#include <sys/types.h> /* ssize_t, struct dirent, pid_t,
38
#include <sys/types.h> /* ssize_t */
40
39
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
42
#include <dirent.h> /* scandir(), alphasort() */
43
41
#include <stdio.h> /* fprintf(), stderr, getline(),
44
stdin, feof(), fputc(), vfprintf(),
42
stdin, feof(), fputc()
46
44
#include <errno.h> /* errno, EBADF, ENOTTY, EINVAL,
47
45
EFAULT, EFBIG, EIO, ENOSPC, EINTR
49
47
#include <error.h> /* error() */
50
48
#include <iso646.h> /* or, not */
51
49
#include <stdbool.h> /* bool, false, true */
52
#include <inttypes.h> /* strtoumax() */
53
#include <sys/stat.h> /* struct stat, lstat(), open() */
54
#include <string.h> /* strlen, rindex, memcmp, strerror()
50
#include <string.h> /* strlen, rindex */
56
51
#include <argp.h> /* struct argp_option, struct
57
52
argp_state, struct argp,
58
53
argp_parse(), error_t,
60
55
ARGP_ERR_UNKNOWN */
61
56
#include <sysexits.h> /* EX_SOFTWARE, EX_OSERR,
62
57
EX_UNAVAILABLE, EX_IOERR, EX_OK */
63
#include <fcntl.h> /* open() */
64
#include <stdarg.h> /* va_list, va_start(), ... */
66
59
volatile sig_atomic_t quit_now = 0;
67
60
int signal_received;
68
61
bool debug = false;
69
62
const char *argp_program_version = "password-prompt " VERSION;
70
const char *argp_program_bug_address = "<mandos@recompile.se>";
72
/* Needed for conflict resolution */
73
const char plymouth_name[] = "plymouthd";
75
/* Function to use when printing errors */
76
void error_plus(int status, int errnum, const char *formatstring,
82
va_start(ap, formatstring);
83
ret = vasprintf(&text, formatstring, ap);
85
fprintf(stderr, "Mandos plugin %s: ",
86
program_invocation_short_name);
87
vfprintf(stderr, formatstring, ap);
88
fprintf(stderr, ": ");
89
fprintf(stderr, "%s\n", strerror(errnum));
90
error(status, errno, "vasprintf while printing error");
93
fprintf(stderr, "Mandos plugin ");
94
error(status, errnum, "%s", text);
63
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
98
65
static void termination_handler(int signum){
103
70
signal_received = signum;
106
bool conflict_detection(void){
108
/* plymouth conflicts with password-prompt since both want to read
109
from the terminal. Password-prompt will exit if it detects
110
plymouth since plymouth performs the same functionality.
112
int is_plymouth(const struct dirent *proc_entry){
119
maxvalue = strtoumax(proc_entry->d_name, &tmp, 10);
121
if(errno != 0 or *tmp != '\0'
122
or maxvalue != (uintmax_t)((pid_t)maxvalue)){
127
char *cmdline_filename;
128
ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
131
error(0, errno, "asprintf");
135
/* Open /proc/<pid>/cmdline */
136
cl_fd = open(cmdline_filename, O_RDONLY);
137
free(cmdline_filename);
140
error(0, errno, "open");
145
char *cmdline = NULL;
147
size_t cmdline_len = 0;
148
size_t cmdline_allocated = 0;
150
const size_t blocksize = 1024;
153
/* Allocate more space? */
154
if(cmdline_len + blocksize + 1 > cmdline_allocated){
155
tmp = realloc(cmdline, cmdline_allocated + blocksize + 1);
157
error(0, errno, "realloc");
163
cmdline_allocated += blocksize;
167
sret = read(cl_fd, cmdline + cmdline_len,
168
cmdline_allocated - cmdline_len);
170
error(0, errno, "read");
175
cmdline_len += (size_t)sret;
179
error(0, errno, "close");
183
cmdline[cmdline_len] = '\0'; /* Make sure it is terminated */
185
/* we now have cmdline */
188
char *cmdline_base = strrchr(cmdline, '/');
189
if(cmdline_base != NULL){
190
cmdline_base += 1; /* skip the slash */
192
cmdline_base = cmdline;
195
if(strcmp(cmdline_base, plymouth_name) != 0){
197
fprintf(stderr, "\"%s\" is not \"%s\"\n", cmdline_base,
204
fprintf(stderr, "\"%s\" equals \"%s\"\n", cmdline_base,
211
struct dirent **direntries = NULL;
213
ret = scandir("/proc", &direntries, is_plymouth, alphasort);
215
error(1, errno, "scandir");
222
73
int main(int argc, char **argv){
added
removed
plugins.d/password-prompt.c
