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// Copyright 2011 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 <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
void test_fclose() {
FILE* f = fopen("temp.txt", "w");
int fd = fileno(f);
// Close the underlying FD, which should then cause fclose to
// fail.
int ret = close(fd);
assert(ret == 0);
ret = fclose(f);
printf("fclose error: %s\n", strerror(errno));
assert(ret == EOF);
}
// Reading
void test_reading() {
FILE *file = fopen("somefile.binary", "rb");
assert(file);
fseek(file, 0, SEEK_END);
int size = ftell(file);
rewind (file);
printf("size: %d\n", size);
char *buffer = (char*)malloc(sizeof(char)*size);
assert(buffer);
size_t read = fread(buffer, 1, size, file);
assert(read == size);
printf("data: %d", buffer[0]);
for (int i = 1; i < size; i++)
printf(",%d", buffer[i]);
printf("\n");
fclose(file);
free(buffer);
// Do it again, with a loop on feof
printf("loop: ");
file = fopen("somefile.binary", "rb");
assert(file);
while (!feof(file)) {
char c = fgetc(file);
if (c != EOF) printf("%d ", c);
}
fclose(file);
printf("\n");
}
// Standard streams
void test_stdstreams() {
char gets_buffer[1024];
printf("input:%s\n", fgets(gets_buffer, 1024, stdin));
fwrite("texto\n", 1, 6, stdout);
fwrite("texte\n", 1, 6, stderr);
putchar('$');
putc('\n', stdout);
}
// Writing
void test_writing() {
char data[5] = { 10, 30, 20, 11, 88 };
FILE *outf = fopen("go.out", "wb");
fwrite(data, 1, 5, outf);
fclose(outf);
FILE *devNull = fopen("/dev/null", "rb");
assert(devNull);
char data2[10];
FILE *inf = fopen("go.out", "rb");
int num = fread(data2, 1, 10, inf);
fclose(inf);
printf("%d : %d,%d,%d,%d,%d\n", num, data2[0], data2[1], data2[2], data2[3], data2[4]);
}
void test_seeking() {
// Test reading a file that has not been cached
FILE *other = fopen("test.file", "r");
assert(other);
char otherData[1000];
int num = fread(otherData, 1, 9, other);
otherData[num] = 0;
printf("other=%s.\n", otherData);
// Seeking
fseek(other, 2, SEEK_SET);
num = fread(otherData, 1, 5, other);
otherData[num] = 0;
printf("seeked=%s.\n", otherData);
fseek(other, -1, SEEK_CUR);
num = fread(otherData, 1, 3, other);
otherData[num] = 0;
printf("seeked=%s.\n", otherData);
fseek(other, -2, SEEK_END);
num = fread(otherData, 1, 2, other);
otherData[num] = 0;
printf("seeked=%s.\n", otherData);
fclose(other);
}
// fscanf
void test_fscanf() {
FILE* outf = fopen("fscan.f", "w");
fprintf(outf, "10 hello");
fclose(outf);
int number;
char text[100];
FILE* inf = fopen("fscan.f", "r");
int num = fscanf(inf, "%d %s", &number, text);
fclose(inf);
printf("fscanfed: %d - %s\n", number, text);
}
// temp files
void test_tempfiles() {
const char *tname = "file_XXXXXX";
char tname1[100];
char tname2[100];
strcpy(tname1, tname);
strcpy(tname2, tname);
assert(!strcmp(tname1, tname2)); // equal
int f1 = mkstemp(tname1);
int f2 = mkstemp(tname2);
assert(f1 != f2);
//printf("%d,%d,%s,%s\n", f1, f2, tname1, tname2);
assert(strcmp(tname1, tname2)); // not equal
assert(fopen(tname1, "r"));
assert(fopen(tname2, "r"));
assert(!fopen(tname2+1, "r")); // sanity check that we can't open just anything
{
FILE* f = tmpfile();
assert(f);
fclose(f);
char* str = tmpnam(NULL);
//printf("temp: %s\n", str);
assert(strncmp("/tmp/", str, 5) == 0);
}
char data[5] = { 10, 30, 20, 11, 88 };
FILE *n = fopen("/dev/null", "w");
printf("5 bytes to dev/null: %zu\n", fwrite(data, 1, 5, n));
fclose(n);
// Test file creation with O_TRUNC (regression test for #16784)
const char *file_name = "test.out";
int fd = open(file_name, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR);
assert(fd >= 0);
int status = write(fd, "blablabla\n", 10);
assert(status == 10);
close(fd);
}
int main() {
test_fclose();
test_reading();
test_stdstreams();
test_writing();
test_seeking();
test_fscanf();
test_tempfiles();
printf("ok.\n");
return 0;
}
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