22
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
42
stdin, feof(), fputc()
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 */
50
#include <string.h> /* strlen, rindex */
55
51
#include <argp.h> /* struct argp_option, struct
56
52
argp_state, struct argp,
57
53
argp_parse(), error_t,
78
70
signal_received = signum;
81
bool conflict_detection(void){
83
/* plymouth conflicts with password-prompt since both want to read
84
from the terminal. Password-prompt will exit if it detects
85
plymouth since plymouth performs the same functionality.
87
int is_plymouth(const struct dirent *proc_entry){
94
maxvalue = strtoumax(proc_entry->d_name, &tmp, 10);
96
if(errno != 0 or *tmp != '\0'
97
or maxvalue != (uintmax_t)((pid_t)maxvalue)){
102
char *cmdline_filename;
103
ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
106
error(0, errno, "asprintf");
110
/* Open /proc/<pid>/cmdline */
111
cl_fd = open(cmdline_filename, O_RDONLY);
112
free(cmdline_filename);
115
error(0, errno, "open");
120
char *cmdline = NULL;
122
size_t cmdline_len = 0;
123
size_t cmdline_allocated = 0;
125
const size_t blocksize = 1024;
128
/* Allocate more space? */
129
if(cmdline_len + blocksize + 1 > cmdline_allocated){
130
tmp = realloc(cmdline, cmdline_allocated + blocksize + 1);
132
error(0, errno, "realloc");
138
cmdline_allocated += blocksize;
142
sret = read(cl_fd, cmdline + cmdline_len,
143
cmdline_allocated - cmdline_len);
145
error(0, errno, "read");
150
cmdline_len += (size_t)sret;
154
error(0, errno, "close");
158
cmdline[cmdline_len] = '\0'; /* Make sure it is terminated */
160
/* we now have cmdline */
163
char *cmdline_base = strrchr(cmdline, '/');
164
if(cmdline_base != NULL){
165
cmdline_base += 1; /* skip the slash */
167
cmdline_base = cmdline;
170
if(strcmp(cmdline_base, plymouth_name) != 0){
172
fprintf(stderr, "\"%s\" is not \"%s\"\n", cmdline_base,
179
fprintf(stderr, "\"%s\" equals \"%s\"\n", cmdline_base,
186
struct dirent **direntries;
188
ret = scandir("/proc", &direntries, is_plymouth, alphasort);
190
error(1, errno, "scandir");
196
73
int main(int argc, char **argv){
275
152
fprintf(stderr, "Starting %s\n", argv[0]);
278
if (conflict_detection()){
280
fprintf(stderr, "Stopping %s because of conflict\n", argv[0]);
286
155
fprintf(stderr, "Storing current terminal attributes\n");