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Reworked slcan_attach to give slcan setup values directly on the commandline.

pull/7/head
Oliver Hartkopp 2008-11-04 10:47:09 +00:00
parent 265021e323
commit 9b717158c6
1 changed files with 88 additions and 12 deletions
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94
slcan_attach.c
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@ -47,6 +47,7 @@
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h>
#include <fcntl.h> #include <fcntl.h>
#include <unistd.h> #include <unistd.h>
#include <getopt.h> #include <getopt.h>
@ -54,9 +55,20 @@
#define LDISC_N_SLCAN 17 /* default slcan line discipline since Kernel 2.6.25 */ #define LDISC_N_SLCAN 17 /* default slcan line discipline since Kernel 2.6.25 */
void usage(char *name) void print_usage(char *prg)
{ {
fprintf(stderr, "Usage: %s [-d] [-l ldisc] tty\n", name); fprintf(stderr, "\nUsage: %s [options] tty\n\n", prg);
fprintf(stderr, "Options: -o (send open command 'O\\r')\n");
fprintf(stderr, " -c (send close command 'C\\r')\n");
fprintf(stderr, " -s <speed> (set CAN speed 0..8)\n");
fprintf(stderr, " -b <btr> (set bit time register value)\n");
fprintf(stderr, " -d (only detach line discipline)\n");
fprintf(stderr, " -w (attach - wait for keypess - detach)\n");
fprintf(stderr, "\nExamples:\n");
fprintf(stderr, "slcan_attach -w -o -s6 -c /dev/ttyS1\n");
fprintf(stderr, "slcan_attach /dev/ttyS1\n");
fprintf(stderr, "slcan_attach -d /dev/ttyS1\n");
fprintf(stderr, "\n");
exit(1); exit(1);
} }
@ -65,41 +77,105 @@ int main(int argc, char **argv)
int fd; int fd;
int ldisc = LDISC_N_SLCAN; int ldisc = LDISC_N_SLCAN;
int detach = 0; int detach = 0;
int waitkey = 0;
int send_open = 0;
int send_close = 0;
char *speed = NULL;
char *btr = NULL;
char buf[10];
char *tty; char *tty;
int opt; int opt;
while ((opt = getopt(argc, argv, "l:d")) != -1) { while ((opt = getopt(argc, argv, "l:dwocs:b:")) != -1) {
switch (opt) { switch (opt) {
case 'l': case 'l':
ldisc = atoi(optarg); fprintf(stderr, "Ignored option '-l'\n");
break; break;
case 'd': case 'd':
detach = 1; detach = 1;
break; break;
case 'w':
waitkey = 1;
break;
case 'o':
send_open = 1;
break;
case 'c':
send_close = 1;
break;
case 's':
speed = optarg;
if (strlen(speed) > 1)
print_usage(argv[0]);
break;
case 'b':
btr = optarg;
if (strlen(btr) > 6)
print_usage(argv[0]);
break;
default: default:
usage(argv[0]); print_usage(argv[0]);
break; break;
} }
} }
if (argc - optind != 1) if (argc - optind != 1)
usage(argv[0]); print_usage(argv[0]);
tty = argv[optind]; tty = argv[optind];
if ((fd = open (tty, O_RDONLY | O_NOCTTY)) < 0) { if ((fd = open (tty, O_WRONLY | O_NOCTTY)) < 0) {
perror(tty); perror(tty);
exit(1); exit(1);
} }
if (detach) if (waitkey || !detach) {
ldisc = N_TTY;
if (speed) {
sprintf(buf, "S%s\r", speed);
write(fd, buf, strlen(buf));
}
if (btr) {
sprintf(buf, "s%s\r", btr);
write(fd, buf, strlen(buf));
}
if (send_open) {
sprintf(buf, "O\r");
write(fd, buf, strlen(buf));
}
if (ioctl (fd, TIOCSETD, &ldisc) < 0) { if (ioctl (fd, TIOCSETD, &ldisc) < 0) {
perror("ioctl"); perror("ioctl");
exit(1); exit(1);
} }
}
if (waitkey) {
printf("Press any key to detach %s ...\n", tty);
getchar();
}
if (waitkey || detach) {
ldisc = N_TTY;
if (ioctl (fd, TIOCSETD, &ldisc) < 0) {
perror("ioctl");
exit(1);
}
if (send_close) {
sprintf(buf, "C\r");
write(fd, buf, strlen(buf));
}
}
close(fd); close(fd);