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#include <linux/types.h>
#include <stdio.h>
#include <dt/dt.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
void *read_file(const char *filename, size_t *size)
{
int fd;
struct stat s;
void *buf = NULL;
int ret;
if (stat(filename, &s))
return NULL;
buf = xzalloc(s.st_size + 1);
fd = open(filename, O_RDONLY);
if (fd < 0)
goto err_out;
if (read(fd, buf, s.st_size) < s.st_size)
goto err_out1;
close(fd);
if (size)
*size = s.st_size;
return buf;
err_out1:
close(fd);
err_out:
free(buf);
return NULL;
}
int main(int argc, char *argv[])
{
void *fdt;
struct device_node *root;
const char *dtbfile = NULL;
if (argc > 1)
dtbfile = argv[1];
if (dtbfile) {
fdt = read_file(dtbfile, NULL);
if (!fdt) {
fprintf(stderr, "Could not read %s: %s\n", dtbfile, strerror(errno));
exit(1);
}
root = of_unflatten_dtb(NULL, fdt);
} else {
root = of_read_proc_devicetree();
}
if (IS_ERR(root)) {
fprintf(stderr, "Could not unflatten dtb: %s\n", strerror(-PTR_ERR(root)));
exit(1);
}
printf("/dts-v1/;\n/");
of_print_nodes(root, 0);
exit(0);
}
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