mirror of
git://projects.qi-hardware.com/ben-wpan.git
synced 2024-12-23 17:09:34 +02:00
62a03bbf32
- usbwait.c (need_removal, wait_for_usb): if need_removal is set, wait for the device to be removed before trying to find it - usbwait.c (usage, main): new option -r to set need_removal
115 lines
2.1 KiB
C
115 lines
2.1 KiB
C
/*
|
|
* usbwait/usbwait.c - Wait for a USB device to appear
|
|
*
|
|
* Written 2011 by Werner Almesberger
|
|
* Copyright 2011 Werner Almesberger
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <sys/time.h>
|
|
|
|
#include "usbopen.h"
|
|
|
|
|
|
#define DEFAULT_POLL_S 0.1
|
|
|
|
|
|
static useconds_t interval_us = DEFAULT_POLL_S*1000000;
|
|
static unsigned long timeout = 0;
|
|
static int need_removal = 0;
|
|
|
|
|
|
static void wait_for_usb(void)
|
|
{
|
|
struct timeval to, now;
|
|
usb_dev_handle *dev;
|
|
|
|
gettimeofday(&to, NULL);
|
|
to.tv_sec += timeout;
|
|
|
|
while (1) {
|
|
usb_rescan();
|
|
dev = open_usb(0, 0);
|
|
if (dev) {
|
|
if (!need_removal)
|
|
return;
|
|
usb_close(dev);
|
|
} else {
|
|
need_removal = 0;
|
|
}
|
|
if (timeout) {
|
|
gettimeofday(&now, NULL);
|
|
if (now.tv_sec > to.tv_sec)
|
|
break;
|
|
if (now.tv_sec == to.tv_sec &&
|
|
now.tv_usec > to.tv_usec)
|
|
break;
|
|
}
|
|
if (usleep(interval_us) < 0) {
|
|
perror("usleep");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
fprintf(stderr, "timeout\n");
|
|
exit(1);
|
|
}
|
|
|
|
|
|
static void usage(const char *name)
|
|
{
|
|
fprintf(stderr,
|
|
"usage: %s [-i poll_s] [-p path] [-r] [-t timeout_s] [vendor]:[product]\n\n"
|
|
" -i poll_s poll interval in seconds (default: %g s)\n"
|
|
" -p path USB device path\n"
|
|
" -r wait for device removal first\n"
|
|
" -t timeout_s timeout in seconds (default: infinite)\n"
|
|
, name, DEFAULT_POLL_S);
|
|
exit(1);
|
|
}
|
|
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
char *end;
|
|
int c;
|
|
|
|
while ((c = getopt(argc, argv, "i:p:rt:")) != EOF)
|
|
switch (c) {
|
|
case 'i':
|
|
interval_us = strtod(optarg, &end)*1000000;
|
|
if (*end || interval_us < 0)
|
|
usage(*argv);
|
|
break;
|
|
case 'p':
|
|
restrict_usb_path(optarg);
|
|
break;
|
|
case 'r':
|
|
need_removal = 1;
|
|
break;
|
|
case 't':
|
|
timeout = strtoul(optarg, &end, 0);
|
|
if (*end || !timeout)
|
|
usage(*argv);
|
|
break;
|
|
default:
|
|
usage(*argv);
|
|
}
|
|
|
|
if (argc != optind+1)
|
|
usage(*argv);
|
|
|
|
parse_usb_id(argv[optind]);
|
|
wait_for_usb();
|
|
|
|
return 0;
|
|
}
|