*
* Author: Ignacio Garcia Perez (iggarpe at gmail dot com)
*
- * License: GPLv2 or later, see LICENSE file in this tarball.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*
* There are some differences from the standard net-tools slattach:
*
*
* - The -F options allows disabling of RTS/CTS flow control.
*/
+//config:config SLATTACH
+//config: bool "slattach"
+//config: default y
+//config: select PLATFORM_LINUX
+//config: help
+//config: slattach is a small utility to attach network interfaces to serial
+//config: lines.
+
+//applet:IF_SLATTACH(APPLET(slattach, BB_DIR_SBIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_SLATTACH) += slattach.o
+
+//usage:#define slattach_trivial_usage
+//usage: "[-cehmLF] [-s SPEED] [-p PROTOCOL] DEVICE"
+//usage:#define slattach_full_usage "\n\n"
+//usage: "Attach network interface(s) to serial line(s)\n"
+//usage: "\n -p PROT Set protocol (slip, cslip, slip6, clisp6 or adaptive)"
+//usage: "\n -s SPD Set line speed"
+//usage: "\n -e Exit after initializing device"
+//usage: "\n -h Exit when the carrier is lost"
+//usage: "\n -c PROG Run PROG when the line is hung up"
+//usage: "\n -m Do NOT initialize the line in raw 8 bits mode"
+//usage: "\n -L Enable 3-wire operation"
+//usage: "\n -F Disable RTS/CTS flow control"
#include "libbb.h"
-#include "libiproute/utils.h" /* invarg() */
+#include "common_bufsiz.h"
+#include "libiproute/utils.h" /* invarg_1_to_2() */
struct globals {
int handle;
int saved_disc;
struct termios saved_state;
-};
-#define G (*(struct globals*)&bb_common_bufsiz1)
+} FIX_ALIASING;
+#define G (*(struct globals*)bb_common_bufsiz1)
#define handle (G.handle )
#define saved_disc (G.saved_disc )
#define saved_state (G.saved_state )
-#define INIT_G() do {} while (0)
+#define INIT_G() do { setup_common_bufsiz(); } while (0)
/*
xioctl(handle, TIOCGETD, &saved_disc);
}
-static int set_termios_state_and_warn(struct termios *state)
+static int set_termios_state_or_warn(struct termios *state)
{
int ret;
* Go on after errors: we want to restore as many controlled ttys
* as possible.
*/
-static void restore_state_and_exit(int exitcode) ATTRIBUTE_NORETURN;
+static void restore_state_and_exit(int exitcode) NORETURN;
static void restore_state_and_exit(int exitcode)
{
struct termios state;
memcpy(&state, &saved_state, sizeof(state));
cfsetispeed(&state, B0);
cfsetospeed(&state, B0);
- if (set_termios_state_and_warn(&state))
+ if (set_termios_state_or_warn(&state))
exitcode = 1;
sleep(1);
/* Restore line status */
- if (set_termios_state_and_warn(&saved_state))
+ if (set_termios_state_or_warn(&saved_state))
exit(EXIT_FAILURE);
if (ENABLE_FEATURE_CLEAN_UP)
close(handle);
int disc;
/* Set line status */
- if (set_termios_state_and_warn(state))
+ if (set_termios_state_or_warn(state))
goto bad;
/* Set line discliple (N_SLIP always) */
disc = N_SLIP;
/* Set encapsulation (SLIP, CSLIP, etc) */
if (ioctl_or_warn(handle, SIOCSIFENCAP, &encap) < 0) {
bad:
- restore_state_and_exit(1);
+ restore_state_and_exit(EXIT_FAILURE);
}
}
-static void sig_handler(int signo)
+static void sig_handler(int signo UNUSED_PARAM)
{
- restore_state_and_exit(0);
+ restore_state_and_exit(EXIT_SUCCESS);
}
int slattach_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int slattach_main(int argc, char **argv)
+int slattach_main(int argc UNUSED_PARAM, char **argv)
{
/* Line discipline code table */
static const char proto_names[] ALIGN1 =
int i, encap, opt;
struct termios state;
const char *proto = "cslip";
- const char *extcmd; /* Command to execute after hangup */
+ const char *extcmd; /* Command to execute after hangup */
const char *baud_str;
- int baud_code = -1; /* Line baud rate (system code) */
+ int baud_code = -1; /* Line baud rate (system code) */
enum {
OPT_p_proto = 1 << 0,
encap = index_in_strings(proto_names, proto);
if (encap < 0)
- invarg(proto, "protocol");
+ invarg_1_to_2(proto, "protocol");
if (encap > 3)
encap = 8;
if (opt & OPT_s_baud) {
baud_code = tty_value_to_baud(xatoi(baud_str));
if (baud_code < 0)
- invarg(baud_str, "baud rate");
+ invarg_1_to_2(baud_str, "baud rate");
}
/* Trap signals in order to restore tty states upon exit */
if (!(opt & OPT_e_quit)) {
- signal(SIGHUP, sig_handler);
- signal(SIGINT, sig_handler);
- signal(SIGQUIT, sig_handler);
- signal(SIGTERM, sig_handler);
+ bb_signals(0
+ + (1 << SIGHUP)
+ + (1 << SIGINT)
+ + (1 << SIGQUIT)
+ + (1 << SIGTERM)
+ , sig_handler);
}
/* Open tty */
state.c_cflag = CS8 | HUPCL | CREAD
| ((opt & OPT_L_local) ? CLOCAL : 0)
| ((opt & OPT_F_noflow) ? 0 : CRTSCTS);
+ cfsetispeed(&state, cfgetispeed(&saved_state));
+ cfsetospeed(&state, cfgetospeed(&saved_state));
}
if (opt & OPT_s_baud) {
system(extcmd);
/* Restore states and exit */
- restore_state_and_exit(0);
+ restore_state_and_exit(EXIT_SUCCESS);
}
projects / oweals / busybox.git / blobdiff