mirror of
https://github.com/sheumann/hush.git
synced 2024-09-12 00:55:11 +00:00
microcom: tiny shrink, adding comments
This commit is contained in:
parent
671ca33aa1
commit
624188aec0
@ -51,18 +51,17 @@ int microcom_main(int argc, char **argv)
|
|||||||
enum {
|
enum {
|
||||||
OPT_X = 1 << 0, // do not respect Ctrl-X, Ctrl-@
|
OPT_X = 1 << 0, // do not respect Ctrl-X, Ctrl-@
|
||||||
OPT_s = 1 << 1, // baudrate
|
OPT_s = 1 << 1, // baudrate
|
||||||
OPT_d = 1 << 2, // wait for device response, msecs
|
OPT_d = 1 << 2, // wait for device response, ms
|
||||||
OPT_t = 1 << 3, // timeout, ms
|
OPT_t = 1 << 3, // timeout, ms
|
||||||
};
|
};
|
||||||
speed_t speed = 9600;
|
speed_t speed = 9600;
|
||||||
int delay = -1;
|
int delay = -1;
|
||||||
int timeout = -1;
|
int timeout = -1;
|
||||||
|
unsigned opts;
|
||||||
|
|
||||||
// fetch options
|
// fetch options
|
||||||
unsigned opts;
|
opt_complementary = "=1:s+:d+:t+"; // exactly one arg, numeric options
|
||||||
opt_complementary = "=1:s+:d+:t+"; // exactly one arg should be there
|
|
||||||
opts = getopt32(argv, "Xs:d:t:", &speed, &delay, &timeout);
|
opts = getopt32(argv, "Xs:d:t:", &speed, &delay, &timeout);
|
||||||
|
|
||||||
// argc -= optind;
|
// argc -= optind;
|
||||||
argv += optind;
|
argv += optind;
|
||||||
|
|
||||||
@ -71,14 +70,16 @@ int microcom_main(int argc, char **argv)
|
|||||||
device_lock_file = xasprintf("/var/lock/LCK..%s", device_lock_file);
|
device_lock_file = xasprintf("/var/lock/LCK..%s", device_lock_file);
|
||||||
sfd = open(device_lock_file, O_CREAT | O_WRONLY | O_TRUNC | O_EXCL, 0644);
|
sfd = open(device_lock_file, O_CREAT | O_WRONLY | O_TRUNC | O_EXCL, 0644);
|
||||||
if (sfd < 0) {
|
if (sfd < 0) {
|
||||||
|
// device already locked -> bail out
|
||||||
if (errno == EEXIST)
|
if (errno == EEXIST)
|
||||||
bb_perror_msg_and_die("can't create %s", device_lock_file);
|
bb_perror_msg_and_die("can't create %s", device_lock_file);
|
||||||
|
// can't create lock -> don't care
|
||||||
if (ENABLE_FEATURE_CLEAN_UP)
|
if (ENABLE_FEATURE_CLEAN_UP)
|
||||||
free(device_lock_file);
|
free(device_lock_file);
|
||||||
device_lock_file = NULL;
|
device_lock_file = NULL;
|
||||||
}
|
} else {
|
||||||
if (sfd > 0) {
|
// %4d to make concurrent mgetty (if any) happy.
|
||||||
// %4d to make mgetty happy. It treats 4-bytes lock files as binary,
|
// Mgetty treats 4-bytes lock files as binary,
|
||||||
// not text, PID. Making 5+ char file. Brrr...
|
// not text, PID. Making 5+ char file. Brrr...
|
||||||
char *s = xasprintf("%4d\n", getpid());
|
char *s = xasprintf("%4d\n", getpid());
|
||||||
write(sfd, s, strlen(s));
|
write(sfd, s, strlen(s));
|
||||||
|
Loading…
Reference in New Issue
Block a user