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#include <emscripten.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
// Creates all ancestor directories of a given file, if they do not already
// exist. Returns 0 on success or 1 on error.
static int mkdirs(const char* file) {
char* copy = strdup(file);
char* c = copy;
while (*c) {
// Create any non-trivial (not the root "/") directory.
if (*c == '/' && c != copy) {
*c = 0;
int result = mkdir(copy, S_IRWXU);
*c = '/';
// Continue while we succeed in creating directories or while we see that
// they already exist.
if (result < 0 && errno != EEXIST) {
free(copy);
return 1;
}
}
c++;
}
free(copy);
return 0;
}
int emscripten_wget(const char* url, const char* file) {
// Create the ancestor directories.
if (mkdirs(file)) {
return 1;
}
// Fetch the data.
void* buffer;
int num;
int error;
emscripten_wget_data(url, &buffer, &num, &error);
if (error) {
return 1;
}
// Write the data.
int fd = open(file, O_WRONLY | O_CREAT, S_IRWXU);
if (fd >= 0) {
write(fd, buffer, num);
close(fd);
}
free(buffer);
return fd < 0;
}
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