blob: b05035b2ea141abcc314e53de163ab47ba5fcd25 [file] [log] [blame]
// Copyright 2014 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <errno.h>
#include <fcntl.h>
#include <glob.h>
#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include "label_detect.h"
/* ioctl() with EINTR retry loop */
int do_ioctl(int fd, int request, void* arg) {
int ret;
do {
ret = ioctl(fd, request, arg);
} while (ret == -1 && errno == EINTR);
return ret;
}
/* Loops files matching a pattern to find any device satisfied predicate
* func(). */
bool is_any_device(const char* pattern, bool (*func)(int fd)) {
int i;
glob_t g;
bool found = false;
memset(&g, 0, sizeof(g));
glob(pattern, 0, NULL, &g);
for (i = 0; i < g.gl_pathc; i++) {
TRACE("found device file %s\n", g.gl_pathv[i]);
int fd = open(g.gl_pathv[i], O_RDWR);
if (fd == -1) {
TRACE("failed to open device\n");
continue;
}
if (func(fd)) {
found = true;
close(fd);
break;
}
close(fd);
}
globfree(&g);
return found;
}
/* Converts FourCC 32 bits integer to printable string. */
void convert_fourcc_to_str(uint32_t fourcc, char* str) {
str[0] = fourcc & 0xff;
str[1] = fourcc >> 8 & 0xff;
str[2] = fourcc >> 16 & 0xff;
str[3] = fourcc >> 24 & 0xff;
str[4] = '\0';
}