int uucp_lock(const char *file) {
int r, fd;
pid_t pid;
char buf[16];
mode_t m;
uucp_lockname(UUCP_LOCK_DIR, file);
if (lockname[0] == '\0')
return 0;
fd = open(lockname, O_RDONLY);
if (fd >= 0) {
r = read(fd, buf, sizeof(buf));
close(fd);
/* if r == 4, lock file is binary (old-style) */
if(r==4){
int *p=(int *) buf;
pid=*p;
}else{
pid=strtol(buf, NULL, 10);
}
if (pid > 0 && kill( pid, 0) < 0 && errno == ESRCH) {
/* stale lock file */
//sleep(1);
unlink(lockname);
} else {
lockname[0] = '\0';
errno = EEXIST;
return -1;
}
}
/* lock it */
m = umask(022);
fd = open(lockname, O_WRONLY | O_CREAT | O_EXCL, 0666);
if (fd < 0) {
lockname[0] = '\0';
return -1;
}
umask(m);
snprintf(buf, sizeof(buf), "%04d\n", getpid());
r = write(fd, buf, strlen(buf));
close(fd);
return 0;
}
int
main(int argc, char *argv[])
{
int r;
parse_args(argc, argv);
establish_signal_handlers();
r = term_lib_init();
if ( r < 0 )
fatal("term_init failed: %s", term_strerror(term_errno, errno));
#ifdef UUCP_LOCK_DIR
if ( ! opts.nolock ) uucp_lockname(UUCP_LOCK_DIR, opts.port);
if ( uucp_lock() < 0 )
fatal("cannot lock %s: %s", opts.port, strerror(errno));
#endif
tty_fd = open(opts.port, O_RDWR | O_NONBLOCK);
if (tty_fd < 0)
fatal("cannot open %s: %s", opts.port, strerror(errno));
if ( opts.noinit ) {
r = term_add(tty_fd);
} else {
r = term_set(tty_fd,
1, /* raw mode. */
opts.baud, /* baud rate. */
opts.parity, /* parity. */
opts.databits, /* data bits. */
opts.flow, /* flow control. */
1, /* local or modem */
!opts.noreset); /* hup-on-close. */
}
if ( r < 0 )
fatal("failed to add device %s: %s",
opts.port, term_strerror(term_errno, errno));
r = term_apply(tty_fd);
if ( r < 0 )
fatal("failed to config device %s: %s",
opts.port, term_strerror(term_errno, errno));
r = term_add(STI);
if ( r < 0 )
fatal("failed to add I/O device: %s",
term_strerror(term_errno, errno));
term_set_raw(STI);
r = term_apply(STI);
if ( r < 0 )
fatal("failed to set I/O device to raw mode: %s",
term_strerror(term_errno, errno));
fd_printf(STO, "Terminal ready\r\n");
loop();
fd_printf(STO, "\r\n");
if ( opts.noreset ) {
fd_printf(STO, "Skipping tty reset...\r\n");
term_erase(tty_fd);
}
fd_printf(STO, "Thanks for using picocom\r\n");
/* wait a bit for output to drain */
sleep(1);
#ifdef UUCP_LOCK_DIR
uucp_unlock();
#endif
return EXIT_SUCCESS;
}
int
main(int argc, char *argv[])
{
int r;
parse_args(argc, argv);
establish_signal_handlers();
r = term_lib_init();
if ( r < 0 )
fatal("term_init failed: %s", term_strerror(term_errno, errno));
#ifdef UUCP_LOCK_DIR
if ( ! opts.nolock ) uucp_lockname(UUCP_LOCK_DIR, opts.port);
if ( uucp_lock() < 0 )
fatal("cannot lock %s: %s", opts.port, strerror(errno));
#endif
tty_fd = open(opts.port, O_RDWR | O_NONBLOCK | O_NOCTTY);
if (tty_fd < 0)
fatal("cannot open %s: %s", opts.port, strerror(errno));
#ifdef USE_FLOCK
if ( ! opts.nolock ) {
r = flock(tty_fd, LOCK_EX | LOCK_NB);
if ( r < 0 )
fatal("cannot lock %s: %s", opts.port, strerror(errno));
}
#endif
if ( opts.noinit ) {
r = term_add(tty_fd);
} else {
r = term_set(tty_fd,
1, /* raw mode. */
opts.baud, /* baud rate. */
opts.parity, /* parity. */
opts.databits, /* data bits. */
opts.stopbits, /* stop bits. */
opts.flow, /* flow control. */
1, /* local or modem */
!opts.noreset); /* hup-on-close. */
}
if ( r < 0 )
fatal("failed to add device %s: %s",
opts.port, term_strerror(term_errno, errno));
r = term_apply(tty_fd, 0);
if ( r < 0 )
fatal("failed to config device %s: %s",
opts.port, term_strerror(term_errno, errno));
set_tty_write_sz(term_get_baudrate(tty_fd, NULL));
r = term_add(STI);
if ( r < 0 )
fatal("failed to add I/O device: %s",
term_strerror(term_errno, errno));
term_set_raw(STI);
r = term_apply(STI, 0);
if ( r < 0 )
fatal("failed to set I/O device to raw mode: %s",
term_strerror(term_errno, errno));
#ifdef LINENOISE
init_history();
#endif
#ifndef NO_HELP
fd_printf(STO, "Type [C-%c] [C-%c] to see available commands\r\n\r\n",
KEYC(opts.escape), KEYC(KEY_HELP));
#endif
fd_printf(STO, "Terminal ready\r\n");
loop();
#ifdef LINENOISE
cleanup_history();
#endif
fd_printf(STO, "\r\n");
if ( opts.noreset ) {
fd_printf(STO, "Skipping tty reset...\r\n");
term_erase(tty_fd);
}
if ( sig_exit )
fd_printf(STO, "Picocom was killed\r\n");
else
fd_printf(STO, "Thanks for using picocom\r\n");
/* wait a bit for output to drain */
sleep(1);
#ifdef UUCP_LOCK_DIR
uucp_unlock();
#endif
return EXIT_SUCCESS;
}
