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util-linux/sys-utils/setserial.c

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/* setserial.c - get/set Linux serial port info - rick sladkey */
/* modified to do work again and added setting fast serial speeds,
Michael K. Johnson, johnsonm@stolaf.edu */
/*
* Very heavily modified --- almost rewritten from scratch --- to have
* a more flexible command structure. Now able to set any of the
* serial-specific options using the TIOCSSERIAL ioctl().
* Theodore Ts'o, tytso@mit.edu, 1/1/93
*
* Last modified: [tytso:19940520.0036EDT]
*/
#include <stdio.h>
#include <fcntl.h>
#include <termios.h>
#include <string.h>
#include <errno.h>
#include <linux/fs.h>
#include <linux/serial.h>
#include <linux/tty.h>
#define VERSION_STR "2.10"
char *progname;
int verbosity = 1; /* 1 = normal, 0=boot-time, 2=everything */
int verbose_flag = 0; /* print results after setting a port */
int quiet_flag = 0;
struct serial_type_struct {
int id;
char *name;
} serial_type_tbl[] = {
PORT_UNKNOWN, "unknown",
PORT_8250, "8250",
PORT_16450, "16450",
PORT_16550, "16550",
PORT_16550A, "16550A",
PORT_UNKNOWN, "none",
-1, NULL
};
#define CMD_FLAG 1
#define CMD_PORT 2
#define CMD_IRQ 3
#define CMD_DIVISOR 4
#define CMD_TYPE 5
#define CMD_BASE 6
#define CMD_DELAY 7
#define CMD_CONFIG 8
#define FLAG_CAN_INVERT 0x0001
#define FLAG_NEED_ARG 0x0002
struct flag_type_table {
int cmd;
char *name;
int bits;
int mask;
int level;
int flags;
} flag_type_tbl[] = {
CMD_FLAG, "spd_normal", 0, ASYNC_SPD_MASK, 2, 0,
CMD_FLAG, "spd_hi", ASYNC_SPD_HI, ASYNC_SPD_MASK, 0, 0,
CMD_FLAG, "spd_vhi", ASYNC_SPD_VHI, ASYNC_SPD_MASK, 0, 0,
CMD_FLAG, "spd_cust", ASYNC_SPD_CUST, ASYNC_SPD_MASK, 0, 0,
CMD_FLAG, "SAK", ASYNC_SAK, ASYNC_SAK, 0, FLAG_CAN_INVERT,
CMD_FLAG, "Fourport", ASYNC_FOURPORT, ASYNC_FOURPORT, 0, FLAG_CAN_INVERT,
CMD_FLAG, "hup_notify", ASYNC_HUP_NOTIFY, ASYNC_HUP_NOTIFY, 0, FLAG_CAN_INVERT,
CMD_FLAG, "skip_test", ASYNC_SKIP_TEST,ASYNC_SKIP_TEST,2, FLAG_CAN_INVERT,
CMD_FLAG, "auto_irq", ASYNC_AUTO_IRQ, ASYNC_AUTO_IRQ, 2, FLAG_CAN_INVERT,
#ifdef ASYNC_SPLIT_TERMIOS
CMD_FLAG, "split_termios", ASYNC_SPLIT_TERMIOS, ASYNC_SPLIT_TERMIOS, 2, FLAG_CAN_INVERT,
#endif
CMD_FLAG, "session_lockout", ASYNC_SESSION_LOCKOUT, ASYNC_SESSION_LOCKOUT, 2, FLAG_CAN_INVERT,
CMD_FLAG, "pgrp_lockout", ASYNC_PGRP_LOCKOUT, ASYNC_PGRP_LOCKOUT, 2, FLAG_CAN_INVERT,
#ifdef ASYNC_CALLOUT_NOHUP
CMD_FLAG, "callout_nohup", ASYNC_CALLOUT_NOHUP, ASYNC_CALLOUT_NOHUP, 2, FLAG_CAN_INVERT,
#endif
CMD_PORT, "port", 0, 0, 0, FLAG_NEED_ARG,
CMD_IRQ, "irq", 0, 0, 0, FLAG_NEED_ARG,
CMD_DIVISOR, "divisor", 0, 0, 0, FLAG_NEED_ARG,
CMD_TYPE, "uart", 0, 0, 0, FLAG_NEED_ARG,
CMD_BASE, "base", 0, 0, 0, FLAG_NEED_ARG,
CMD_BASE, "baud_base", 0, 0, 0, FLAG_NEED_ARG,
CMD_DELAY, "close_delay", 0, 0, 0, FLAG_NEED_ARG,
CMD_CONFIG, "autoconfig", 0, 0, 0, 0,
0, 0, 0, 0, 0, 0,
};
char *serial_type(int id)
{
int i;
for (i = 0; serial_type_tbl[i].id != -1; i++)
if (id == serial_type_tbl[i].id)
return serial_type_tbl[i].name;
return "undefined";
}
int uart_type(char *name)
{
int i;
for (i = 0; serial_type_tbl[i].id != -1; i++)
if (!strcasecmp(name, serial_type_tbl[i].name))
return serial_type_tbl[i].id;
return -1;
}
int atonum(char *s)
{
int n;
while (*s == ' ')
s++;
if (strncmp(s, "0x", 2) == 0 || strncmp(s, "0X", 2) == 0)
sscanf(s + 2, "%x", &n);
else if (s[0] == '0' && s[1])
sscanf(s + 1, "%o", &n);
else
sscanf(s, "%d", &n);
return n;
}
void print_flags(struct serial_struct *serinfo,
char *prefix, char *postfix)
{
struct flag_type_table *p;
int flags;
int first = 1;
flags = serinfo->flags;
for (p = flag_type_tbl; p->name; p++) {
if (p->cmd != CMD_FLAG)
continue;
if (verbosity < p->level)
continue;
if ((flags & p->mask) == p->bits) {
if (first) {
printf("%s", prefix);
first = 0;
} else
printf(" ");
printf("%s", p->name);
}
}
if (!first)
printf("%s", postfix);
}
void get_serial(char *device)
{
struct serial_struct serinfo;
int fd;
if ((fd = open(device, O_RDWR|O_NONBLOCK)) < 0) {
perror(device);
return;
}
if (ioctl(fd, TIOCGSERIAL, &serinfo) < 0) {
perror("Cannot get serial info");
close(fd);
return;
}
if (serinfo.irq == 9)
serinfo.irq = 2; /* People understand 2 better than 9 */
if (verbosity==2) {
printf("%s, Line %d, UART: %s, Port: 0x%.4x, IRQ: %d\n",
device, serinfo.line, serial_type(serinfo.type),
serinfo.port, serinfo.irq);
printf("\tBaud_base: %d, close_delay: %d, divisor: %d\n",
serinfo.baud_base, serinfo.close_delay,
serinfo.custom_divisor);
print_flags(&serinfo, "\tFlags: ", "");
printf("\n\n");
} else if (verbosity==0) {
if (serinfo.type) {
printf("%s at 0x%.4x (irq = %d) is a %s",
device, serinfo.port, serinfo.irq,
serial_type(serinfo.type));
print_flags(&serinfo, " (", ")");
printf("\n");
}
} else {
printf("%s, UART: %s, Port: 0x%.4x, IRQ: %d",
device, serial_type(serinfo.type),
serinfo.port, serinfo.irq);
print_flags(&serinfo, ", Flags: ", "");
printf("\n");
}
close(fd);
}
void set_serial(char *device, char ** arg)
{
struct serial_struct old_serinfo, new_serinfo;
struct flag_type_table *p;
int fd;
int do_invert = 0;
char *word;
if ((fd = open(device, O_RDWR|O_NONBLOCK)) < 0) {
if (verbosity==0 && errno==ENOENT)
exit(201);
perror(device);
exit(201);
}
if (ioctl(fd, TIOCGSERIAL, &old_serinfo) < 0) {
perror("Cannot get serial info");
exit(1);
}
new_serinfo = old_serinfo;
while (*arg) {
do_invert = 0;
word = *arg++;
if (*word == '^') {
do_invert++;
word++;
}
for (p = flag_type_tbl; p->name; p++) {
if (!strcasecmp(p->name, word))
break;
}
if (!p->name) {
fprintf(stderr, "Invalid flag: %s\n", word);
exit(1);
}
if (do_invert && !(p->flags & FLAG_CAN_INVERT)) {
fprintf(stderr, "This flag can not be inverted: %s\n", word);
exit(1);
}
if ((p->flags & FLAG_NEED_ARG) && !*arg) {
fprintf(stderr, "Missing argument for %s\n", word);
exit(1);
}
switch (p->cmd) {
case CMD_FLAG:
new_serinfo.flags &= ~p->mask;
if (!do_invert)
new_serinfo.flags |= p->bits;
break;
case CMD_PORT:
new_serinfo.port = atonum(*arg++);
break;
case CMD_IRQ:
new_serinfo.irq = atonum(*arg++);
break;
case CMD_DIVISOR:
new_serinfo.custom_divisor = atonum(*arg++);
break;
case CMD_TYPE:
new_serinfo.type = uart_type(*arg++);
if (new_serinfo.type < 0) {
fprintf(stderr, "Illegal UART type: %s", *--arg);
exit(1);
}
break;
case CMD_BASE:
new_serinfo.baud_base = atonum(*arg++);
break;
case CMD_DELAY:
new_serinfo.close_delay = atonum(*arg++);
break;
case CMD_CONFIG:
if (ioctl(fd, TIOCSSERIAL, &new_serinfo) < 0) {
perror("Cannot set serial info");
exit(1);
}
if (ioctl(fd, TIOCSERCONFIG) < 0) {
perror("Cannot autoconfigure port");
exit(1);
}
if (ioctl(fd, TIOCGSERIAL, &new_serinfo) < 0) {
perror("Cannot get serial info");
exit(1);
}
break;
default:
fprintf(stderr, "Internal error: unhandled cmd #%d\n", p->cmd);
exit(1);
}
}
if (ioctl(fd, TIOCSSERIAL, &new_serinfo) < 0) {
perror("Cannot set serial info");
exit(1);
}
close(fd);
if (verbose_flag)
get_serial(device);
}
void do_wild_intr(char *device)
{
int fd;
int i, mask;
int wild_mask = -1;
if ((fd = open(device, O_RDWR|O_NONBLOCK)) < 0) {
perror(device);
exit(1);
}
if (ioctl(fd, TIOCSERSWILD, &wild_mask) < 0) {
perror("Cannot scan for wild interrupts");
exit(1);
}
if (ioctl(fd, TIOCSERGWILD, &wild_mask) < 0) {
perror("Cannot get wild interrupt mask");
exit(1);
}
close(fd);
if (quiet_flag)
return;
if (wild_mask) {
printf("Wild interrupts found: ");
for (i=0, mask=1; mask <= wild_mask; i++, mask <<= 1)
if (mask & wild_mask)
printf(" %d", i);
printf("\n");
} else if (verbose_flag)
printf("No wild interrupts found.\n");
return;
}
void usage()
{
fprintf(stderr, "setserial Version %s\n\n", VERSION_STR);
fprintf(stderr,
"usage: %s serial-device [cmd1 [arg]] ... \n\n", progname);
fprintf(stderr, "Available commands: (* = Takes an argument)\n");
fprintf(stderr, "\t\t(^ = can be preceded by a '^' to turn off the option)\n");
fprintf(stderr, "\t* port\t\tset the I/O port\n");
fprintf(stderr, "\t* irq\t\tset the interrupt\n");
fprintf(stderr, "\t* uart\t\tset UART type (none, 8250, 16450, 16550, 16550A\n");
fprintf(stderr, "\t* baud_base\tset base baud rate (CLOCK_FREQ / 16)\n");
fprintf(stderr, "\t* divisor\tset the custom divisor (see spd_custom)\n");
fprintf(stderr, "\t* close_delay\tset the amount of time (in 1/100 of a\n");
fprintf(stderr, "\t\t\t\tsecond) that DTR should be kept low\n");
fprintf(stderr, "\t\t\t\twhile being closed\n");
fprintf(stderr, "\t^ fourport\tconfigure the port as an AST Fourport\n");
fprintf(stderr, "\t autoconfigure\tautomatically configure the serial port\n");
fprintf(stderr, "\t^ auto_irq\ttry to determine irq during autoconfiguration\n");
fprintf(stderr, "\t^ skip_test\tskip UART test during autoconfiguration\n");
fprintf(stderr, "\n");
fprintf(stderr, "\t^ sak\t\tset the break key as the Secure Attention Key\n");
fprintf(stderr, "\t^ session_lockout Lock out callout port across different sessions\n");
fprintf(stderr, "\t^ pgrp_lockout\tLock out callout port across different process groups\n");
#ifdef ASYNC_CALLOUT_NOHUP
fprintf(stderr, "\t^ callout_nohup\tDon't hangup the tty when carrier detect drops\n");
#endif
fprintf(stderr, "\t\t\t\t on the callout device\n");
#ifdef ASYNC_SPLIT_TERMIOS
fprintf(stderr, "\t^ split_termios Use separate termios for callout and dailin lines\n");
#endif
fprintf(stderr, "\t^ hup_notify\tNotify a process blocked on opening a dial in line\n");
fprintf(stderr, "\t\t\t\twhen a process has finished using a callout\n");
fprintf(stderr, "\t\t\t\tline by returning EAGAIN to the open.\n");
fprintf(stderr, "\n");
fprintf(stderr, "\t spd_hi\tuse 56kb instead of 38.4kb\n");
fprintf(stderr, "\t spd_vhi\tuse 115kb instead of 38.4kb\n");
fprintf(stderr, "\t spd_cust\tuse the custom divisor to set the speed at 38.4kb\n");
fprintf(stderr, "\t\t\t\t(baud rate = baud_base / custom_divisor)\n");
fprintf(stderr, "\t spd_normal\tuse 38.4kb when a buad rate of 38.4kb is selected\n");
fprintf(stderr, "\n");
fprintf(stderr, "Use a leading '0x' for hex numbers.\n");
fprintf(stderr, "CAUTION: Using an invalid port can lock up your machine!\n");
exit(1);
}
main(int argc, char **argv)
{
int get_flag = 0, wild_intr_flag = 0;
int c;
extern int optind;
extern char *optarg;
progname = argv[0];
if (argc == 1)
usage();
while ((c = getopt(argc, argv, "abgqvVW")) != EOF) {
switch (c) {
case 'a':
verbosity = 2;
break;
case 'b':
verbosity = 0;
break;
case 'q':
quiet_flag++;
break;
case 'v':
verbose_flag++;
break;
case 'g':
get_flag++;
break;
case 'V':
fprintf(stderr, "setserial version %s\n", VERSION_STR);
exit(0);
case 'W':
wild_intr_flag++;
break;
default:
usage();
}
}
if (get_flag) {
argv += optind;
while (*argv)
get_serial(*argv++);
exit(0);
}
if (argc == optind)
usage();
if (wild_intr_flag) {
do_wild_intr(argv[optind]);
exit(0);
}
if (argc-optind == 1)
get_serial(argv[optind]);
else
set_serial(argv[optind], argv+optind+1);
exit(0);
}
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