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Fight agaist hanging modems: add new drainwait option.

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Reviewed by: Bruce
This commit is contained in:
Andrey A. Chernov 1995-01-05 00:03:06 +00:00
parent 33c38bd574
commit b0e399e3c4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=5397
4 changed files with 76 additions and 24 deletions
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11
sbin/comcontrol/comcontrol.8
View file

@ -24,6 +24,17 @@ Set the time to wait after dropping DTR
to the given number.
The units are hundredths of a second.
The default is 300 hundredths, i.e., 3 seconds.
This option needed mainly to set proper recover time after
modem reset.
.El
.Bl -tag -width Fl
.It Cm drainwait Ar number
Set the time to wait for output drain
to the given number.
The units are seconds.
The default is 0, i.e. wait forever.
This option needed mainly to specify upper limit of minutes
to prevent modem hanging.
.El
.Pp
The standard way to use

39
sbin/comcontrol/comcontrol.c
View file

@ -38,35 +38,38 @@
void usage(char *progname)
{
fprintf(stderr, "usage: %s <filename> [dtrwait <n>]\n", progname);
fprintf(stderr, "usage: %s <filename> [dtrwait <n>] [drainwait <n>]\n", progname);
exit(1);
}
int main(int argc, char *argv[])
{
int fd;
int res;
int dtrwait;
int res = 0;
int dtrwait = -1, drainwait = -1;
if ((argc < 2) || (argc > 5)) usage(argv[0]);
fd = open(argv[1], O_RDONLY|O_NONBLOCK, 0);
if (fd < 0) {
fprintf(stderr, "%s: couldn't open file %s\n", argv[0], argv[1]);
perror("open");
exit(1);
fprintf(stderr, "%s: couldn't open file %s\n", argv[0], argv[1]);
return 1;
}
if (argc == 2) {
if (ioctl(fd, TIOCMGDTRWAIT, &dtrwait) < 0) {
res = 1;
perror("TIOCMGDTRWAIT");
exit(1);
}
printf("dtrwait %d\n", dtrwait);
if (ioctl(fd, TIOCGDRAINWAIT, &drainwait) < 0) {
res = 1;
perror("TIOCGDRAINWAIT");
}
printf("dtrwait %d drainwait %d\n", dtrwait, drainwait);
} else {
char *prg = argv[0];
res = dtrwait = -1;
while (argv[2] != NULL) {
if (!strcmp(argv[2],"dtrwait")) {
if (dtrwait >= 0)
@ -75,18 +78,30 @@ int main(int argc, char *argv[])
usage(prg);
dtrwait = atoi(argv[3]);
argv += 2;
} else {
} else if (!strcmp(argv[2],"drainwait")) {
if (drainwait >= 0)
usage(prg);
if (argv[3] == NULL || !isdigit(argv[3][0]))
usage(prg);
drainwait = atoi(argv[3]);
argv += 2;
} else
usage(prg);
}
}
if (dtrwait >= 0) {
if (ioctl(fd, TIOCMSDTRWAIT, &dtrwait) < 0) {
res = 1;
perror("TIOCMSDTRWAIT");
exit(1);
}
}
if (drainwait >= 0) {
if (ioctl(fd, TIOCSDRAINWAIT, &drainwait) < 0) {
res = 1;
perror("TIOCSDRAINWAIT");
}
}
}
close(fd);
exit(0);
return res;
}

11
sbin/i386/comcontrol/comcontrol.8
View file

@ -24,6 +24,17 @@ Set the time to wait after dropping DTR
to the given number.
The units are hundredths of a second.
The default is 300 hundredths, i.e., 3 seconds.
This option needed mainly to set proper recover time after
modem reset.
.El
.Bl -tag -width Fl
.It Cm drainwait Ar number
Set the time to wait for output drain
to the given number.
The units are seconds.
The default is 0, i.e. wait forever.
This option needed mainly to specify upper limit of minutes
to prevent modem hanging.
.El
.Pp
The standard way to use

39
sbin/i386/comcontrol/comcontrol.c
View file

@ -38,35 +38,38 @@
void usage(char *progname)
{
fprintf(stderr, "usage: %s <filename> [dtrwait <n>]\n", progname);
fprintf(stderr, "usage: %s <filename> [dtrwait <n>] [drainwait <n>]\n", progname);
exit(1);
}
int main(int argc, char *argv[])
{
int fd;
int res;
int dtrwait;
int res = 0;
int dtrwait = -1, drainwait = -1;
if ((argc < 2) || (argc > 5)) usage(argv[0]);
fd = open(argv[1], O_RDONLY|O_NONBLOCK, 0);
if (fd < 0) {
fprintf(stderr, "%s: couldn't open file %s\n", argv[0], argv[1]);
perror("open");
exit(1);
fprintf(stderr, "%s: couldn't open file %s\n", argv[0], argv[1]);
return 1;
}
if (argc == 2) {
if (ioctl(fd, TIOCMGDTRWAIT, &dtrwait) < 0) {
res = 1;
perror("TIOCMGDTRWAIT");
exit(1);
}
printf("dtrwait %d\n", dtrwait);
if (ioctl(fd, TIOCGDRAINWAIT, &drainwait) < 0) {
res = 1;
perror("TIOCGDRAINWAIT");
}
printf("dtrwait %d drainwait %d\n", dtrwait, drainwait);
} else {
char *prg = argv[0];
res = dtrwait = -1;
while (argv[2] != NULL) {
if (!strcmp(argv[2],"dtrwait")) {
if (dtrwait >= 0)
@ -75,18 +78,30 @@ int main(int argc, char *argv[])
usage(prg);
dtrwait = atoi(argv[3]);
argv += 2;
} else {
} else if (!strcmp(argv[2],"drainwait")) {
if (drainwait >= 0)
usage(prg);
if (argv[3] == NULL || !isdigit(argv[3][0]))
usage(prg);
drainwait = atoi(argv[3]);
argv += 2;
} else
usage(prg);
}
}
if (dtrwait >= 0) {
if (ioctl(fd, TIOCMSDTRWAIT, &dtrwait) < 0) {
res = 1;
perror("TIOCMSDTRWAIT");
exit(1);
}
}
if (drainwait >= 0) {
if (ioctl(fd, TIOCSDRAINWAIT, &drainwait) < 0) {
res = 1;
perror("TIOCSDRAINWAIT");
}
}
}
close(fd);
exit(0);
return res;
}