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#include "config.h"
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <fcntl.h>
#include "opt.h"
#include "log.h"
#include "ui.h"
#include "ui_ipc.h"
#include "ui_ani.h"
#include "ui_input.h"
#include "ui_statusbar.h"
#include "ui_nask.h"
#define MSG(msg_idx) msg_arr[msg_idx]
enum msg_index {
MSG_BUSY_FD = 0,
MSG_BUSY,
MSG_NO_FIFO,
MSG_FIFO_ERR,
MSG_FIFO_BUSY,
MSG_CRYPTCMD_ERR,
MSG_NUM
};
static const char *msg_arr[] = { "Please wait, got a piped password",
"Please wait, busy",
"check_fifo: %s is not a FIFO\n",
"check_fifo: %s error(%d): %s\n",
"fifo: cryptcreate busy",
"cryptcreate error"
};
static bool
check_fifo(char *fifo_path)
{
struct stat st;
if (mkfifo(fifo_path, S_IRUSR | S_IWUSR) == 0) {
return (true);
} else {
if (errno == EEXIST) {
if (stat(fifo_path, &st) == 0) {
if (S_ISFIFO(st.st_mode) == 1) {
return (true);
} else {
fprintf(stderr, MSG(MSG_NO_FIFO), fifo_path);
return (false);
}
}
}
}
fprintf(stderr, MSG(MSG_FIFO_ERR), fifo_path, errno, strerror(errno));
return (false);
}
int
run_cryptcreate(char *pass, char *crypt_cmd)
{
int retval;
char *cmd;
if (crypt_cmd == NULL || pass == NULL) return -1;
if (asprintf(&cmd, "echo '%s' | %s >/dev/null 2>/dev/null", pass, crypt_cmd) < 0)
return -2;
retval = system(cmd);
free(cmd);
return (retval);
}
void sigfunc(int signal)
{
switch (signal) {
case SIGSEGV:
case SIGTERM:
ui_ipc_semtrywait(SEM_UI);
break;
}
}
int
main(int argc, char **argv)
{
int ret = EXIT_FAILURE, ffd = -1, c_status;
pid_t child;
char pbuf[IPC_MQSIZ+1];
bool csetup_ok = false;
signal(SIGINT, SIG_IGN);
signal(SIGTERM, sigfunc);
if ( parse_cmd(argc, argv) != 0 )
exit(EXIT_FAILURE);
if (OPT(CRYPT_CMD).found == 0) {
fprintf(stderr, "%s: crypt cmd is mandatory\n", argv[0]);
goto error;
}
if (check_fifo(GETOPT(FIFO_PATH).str) == false)
goto error;
if ((ffd = open(GETOPT(FIFO_PATH).str, O_NONBLOCK | O_RDWR)) < 0) {
fprintf(stderr, "%s: fifo '%s' error: %d (%s)\n", argv[0], GETOPT(FIFO_PATH).str, errno, strerror(errno));
goto error;
}
if (ui_ipc_init(1) != 0) {
fprintf(stderr, "%s: can not create semaphore/message queue: %d (%s)\n", argv[0], errno, strerror(errno));
goto error;
}
memset(pbuf, '\0', IPC_MQSIZ+1);
log_init( GETOPT(LOG_FILE).str );
logs("%s\n", "log init");
logs_dbg("%s\n", "debug mode active");
ui_ipc_sempost(SEM_UI);
ui_ipc_sempost(SEM_IN);
if ((child = fork()) == 0) {
/* child */
logs("%s\n", "child");
if (ffd >= 0) close(ffd);
#ifndef DEBUG
fclose(stderr);
#endif
/* Slave process: TUI */
if (ui_ipc_init(0) == 0) {
do_ui();
}
ui_ipc_free(0);
exit(0);
} else if (child > 0) {
/* parent */
logs("%s\n", "parent");
fclose(stdin);
fclose(stdout);
/* Master process: mainloop (read passwd from message queue or fifo and exec cryptcreate */
while ( ui_ipc_getvalue(SEM_UI) > 0 ) {
if (read(ffd, pbuf, IPC_MQSIZ) >= 0) {
ui_ipc_semwait(SEM_IN);
logs_dbg("%s\n", "fifo password");
if (run_cryptcreate(pbuf, GETOPT(CRYPT_CMD).str) != 0) {
logs_dbg("%s\n", "cryptcreate error");
sleep(3);
} else {
csetup_ok = true;
logs_dbg("%s\n", "cryptcreate success");
ui_ipc_semtrywait(SEM_UI);
}
ui_ipc_sempost(SEM_IN);
} else if ( ui_ipc_msgcount(MQ_PW) > 0 ) {
//ui_ipc_semwait(SEM_IN);
ui_ipc_msgrecv(MQ_PW, pbuf, 0);
logs_dbg("%s\n", "password");
ui_ipc_msgsend(MQ_IF, MSG(MSG_BUSY));
if (run_cryptcreate(pbuf, GETOPT(CRYPT_CMD).str) != 0) {
logs_dbg("%s\n", "cryptcreate error");
ui_ipc_msgsend(MQ_IF, MSG(MSG_CRYPTCMD_ERR));
} else {
csetup_ok = true;
logs_dbg("%s\n", "cryptcreate success");
ui_ipc_semtrywait(SEM_UI);
}
//ui_ipc_sempost(SEM_IN);
}
usleep(100000);
}
logs("%s\n", "waiting for child");
wait(&c_status);
memset(pbuf, '\0', IPC_MQSIZ+1);
} else {
/* fork error */
perror("fork");
goto error;
}
if (csetup_ok)
ret = EXIT_SUCCESS;
else
ret = EXIT_FAILURE;
ui_ipc_free(1);
error:
logs("%s\n", "exiting ..");
if (ffd >= 0) close(ffd);
log_free();
exit(ret);
}
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