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#include <sys/stat.h>
#include <sys/time.h>
#include <assert.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <sched.h>
#include <stdio.h>
#include <time.h>
#include <unistd.h>
#include <utime.h>
int main(void)
{
struct timespec times[2];
struct dirent * entry;
char buf[4];
DIR * dir;
FILE * fp;
struct stat st;
off_t offset;
int fd;
int res;
fd = open("/sandbox/testfile", O_CREAT | O_RDWR, 0644);
assert(fd != -1);
res = posix_fallocate(fd, 0, 10000);
assert(res == 0);
res = fstat(fd, &st);
assert(res == 0);
assert(st.st_size == 10000);
res = ftruncate(fd, 1000);
res = fstat(fd, &st);
assert(res == 0);
assert(st.st_size == 1000);
assert(st.st_nlink == 1);
res = posix_fadvise(fd, 0, 1000, POSIX_FADV_RANDOM);
assert(res == 0);
res = (int) write(fd, "test", 4);
assert(res == 4);
offset = lseek(fd, 0, SEEK_CUR);
assert(offset == 4);
offset = lseek(fd, 0, SEEK_END);
assert(offset == 1000);
offset = lseek(fd, 0, SEEK_SET);
assert(offset == 0);
res = fdatasync(fd);
assert(res == 0);
res = fsync(fd);
assert(res == 0);
times[0] = (struct timespec){ .tv_sec = 1557403800, .tv_nsec = 0 };
times[1] = (struct timespec){ .tv_sec = 1557403800, .tv_nsec = 0 };
res = futimens(fd, times);
assert(res == 0);
res = pread(fd, buf, sizeof buf, 2);
assert(res == 4);
assert(buf[1] == 't');
res = pwrite(fd, "T", 1, 3);
assert(res == 1);
res = pread(fd, buf, sizeof buf, 2);
assert(res == 4);
assert(buf[1] == 'T');
res = close(fd);
assert(res == 0);
dir = opendir("/nonexistent");
assert(dir == NULL);
res = mkdir("/sandbox/test", 0755);
assert(res == 0);
res = mkdir("/sandbox/test", 0755);
assert(res == -1);
assert(errno == EEXIST);
res = rmdir("/sandbox/test");
assert(res == 0);
res = rmdir("/sandbox/test");
assert(res == -1);
res = rename("/sandbox/testfile", "/sandbox/testfile2");
assert(res == 0);
res = unlink("/sandbox/testfile");
assert(res == -1);
res = access("/sandbox/testfile2", R_OK);
assert(res == 0);
res = link("/sandbox/testfile2", "/sandbox/testfile-link");
assert(res == 0);
res = access("/sandbox/testfile-link", R_OK);
assert(res == 0);
res = symlink("/sandbox/testfile-link", "/sandbox/testfile-symlink");
assert(res == 0);
res = symlink("/sandbox/testfile2", "/sandbox/testfile-symlink");
assert(res == -1);
res = sched_yield();
assert(res == 0);
fd = open("/sandbox/testfile2", O_RDONLY);
assert(fd != -1);
fp = fdopen(fd, "r");
assert(fp != NULL);
res = fgetc(fp);
assert(res == 't');
res = fclose(fp);
assert(res == 0);
dir = opendir("/sandbox");
assert(dir != NULL);
res = 0;
while ((entry = readdir(dir)) != NULL) {
if (entry->d_name[0] == '.') {
res += 1000;
} else {
res++;
}
}
assert(res == 2003);
res = closedir(dir);
assert(res == 0);
res = mkdir("/sandbox/a", 0755);
assert(res == 0);
res = mkdir("/sandbox/a/b", 0755);
assert(res == 0);
res = mkdir("/sandbox/a/b/c", 0755);
assert(res == 0);
res = access("/sandbox/a/b/c", R_OK);
assert(res == 0);
return 0;
}
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