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/*
* Copyright 2014 The Emscripten Authors. All rights reserved.
* Emscripten is available under two separate licenses, the MIT license and the
* University of Illinois/NCSA Open Source License. Both these licenses can be
* found in the LICENSE file.
*/
#include <stdio.h>
#include <stdlib.h>
#include <emscripten.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
int main() {
EM_ASM(
var O_RDONLY = 0;
var O_WRONLY = 1;
var O_RDWR = 2;
var O_CREAT = 64;
var O_EXCL = 128;
var O_TRUNC = 512;
var O_APPEND = 1024;
var O_ACCMODE = 2097155;
FS.trackingDelegate['willMovePath'] = function(oldpath, newpath) {
out('About to move "' + oldpath + '" to "' + newpath + '"');
};
FS.trackingDelegate['onMovePath'] = function(oldpath, newpath) {
out('Moved "' + oldpath + '" to "' + newpath + '"');
};
FS.trackingDelegate['willDeletePath'] = function(path) {
out('About to delete "' + path + '"');
};
FS.trackingDelegate['onDeletePath'] = function(path) {
out('Deleted "' + path + '"');
};
FS.trackingDelegate['onOpenFile'] = function(path, flags) {
var stat = FS.stat(path);
var fileSize = stat.size;
var trackingFlags = [];
if (flags & O_CREAT) {
trackingFlags.push('O_CREAT');
}
if (flags & O_TRUNC) {
trackingFlags.push('O_TRUNC');
}
if (flags & O_APPEND) {
trackingFlags.push('O_APPEND');
}
if (flags & O_EXCL) {
trackingFlags.push('O_EXCL');
}
// The argument flags must include one of the following access
// modes: O_RDONLY, O_WRONLY, or O_RDWR. These request opening the
// file read-only, write-only, or read/write, respectively.
// https://man7.org/linux/man-pages/man2/open.2.html
if ((flags & O_ACCMODE) == O_WRONLY) {
trackingFlags.push('O_WRONLY');
}
if ((flags & O_ACCMODE) == O_RDWR) {
trackingFlags.push('O_RDWR');
}
if ((flags & O_ACCMODE) == O_RDONLY) {
trackingFlags.push('O_RDONLY');
}
var output = 'Opened "' + path + '" with flags ';
for (var i = 0; i < trackingFlags.length; i++) {
output += trackingFlags[i] + ' ';
}
output += 'and file size ' + fileSize;
out(output)
};
FS.trackingDelegate['onReadFile'] = function(path, bytesRead) {
out('Read ' + bytesRead + ' bytes from "' + path + '"');
};
FS.trackingDelegate['onWriteToFile'] = function(path, bytesWritten) {
out('Wrote to file "' + path + '" with ' + bytesWritten + ' bytes written');
};
FS.trackingDelegate['onSeekFile'] = function(path, position, whence) {
out('Seek on "' + path + '" with position ' + position + ' and whence ' + whence);
};
FS.trackingDelegate['onCloseFile'] = function(path) {
out('Closed ' + path);
};
FS.trackingDelegate['onMakeDirectory'] = function(path, mode) {
out('Created directory "' + path + '" with mode ' + mode);
};
FS.trackingDelegate['onMakeSymlink'] = function(oldpath, newpath) {
out('Created symlink from "' + oldpath + '" to "' + newpath + '"');
};
);
FILE *file;
char buffer[100];
file = fopen("/file.txt", "w+");
fputs("hello", file);
fwrite(" world", 7, 1, file);
fseek(file, 0, SEEK_SET);
fread(buffer, 13, 1, file);
printf("%s\n", buffer);
fclose(file);
rename("/file.txt", "/renamed.txt");
file = fopen("/renamed.txt", "r");
char str[256] = {};
fgets(str, 255, file);
printf("File read returned '%s'\n", str);
fclose(file);
// Test unistd.h functions
int fd = open("/renamed.txt", O_RDONLY);
close(fd);
fd = open("/renamed.txt", O_WRONLY);
close(fd);
fd = open("/renamed.txt", O_RDWR);
char test[] = "test";
write(fd, test, 10);
lseek(fd, 0, SEEK_SET);
char output[100];
read(fd, output, 100);
printf("read returned %s\n", output);
close(fd);
fd = open("/renamed.txt", O_CREAT, 0666);
close(fd);
fd = open("/renamed.txt", O_EXCL | O_WRONLY);
close(fd);
fd = open("/renamed.txt", O_TRUNC);
close(fd);
fd = open("/renamed.txt", O_TRUNC | O_WRONLY);
close(fd);
fd = open("/renamed.txt", O_TRUNC | O_RDWR);
close(fd);
fd = open("/renamed.txt", O_APPEND | O_RDONLY);
close(fd);
remove("/renamed.txt");
mkdir("/home/test", S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
symlink("/renamed.txt", "/file.txt");
}
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