81 lines
2.0 KiB
C
81 lines
2.0 KiB
C
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
|
|
int main(int argc, const char *argv[]) {
|
|
const char *FILE_NAME = "root/test_filesystem_truncate.txt";
|
|
const int TRUNC_LEN = 256;
|
|
const int TRUNC_LEN1 = 128;
|
|
const int MODE_MASK = 0777;
|
|
|
|
int ret;
|
|
|
|
int flags = O_WRONLY | O_CREAT | O_TRUNC;
|
|
int mode = 00666;
|
|
int fd = open(FILE_NAME, flags, mode);
|
|
if (fd < 0) {
|
|
printf("failed to open a file for write\n");
|
|
return fd;
|
|
}
|
|
|
|
if (access(FILE_NAME, F_OK) < 0) {
|
|
printf("cannot access the new file\n");
|
|
return -1;
|
|
}
|
|
|
|
ret = ftruncate(fd, TRUNC_LEN);
|
|
if (ret < 0) {
|
|
printf("failed to ftruncate the file\n");
|
|
return ret;
|
|
}
|
|
|
|
struct stat stat_buf;
|
|
ret = fstat(fd, &stat_buf);
|
|
if (ret < 0) {
|
|
printf("failed to fstat the file\n");
|
|
return ret;
|
|
}
|
|
|
|
int file_size = stat_buf.st_size;
|
|
if (file_size != TRUNC_LEN) {
|
|
printf("Incorrect file size %d. Expected %d\n", file_size, TRUNC_LEN);
|
|
return -1;
|
|
}
|
|
int file_mode = stat_buf.st_mode & MODE_MASK;
|
|
if (file_mode != mode) {
|
|
printf("Incorrect file mode %o. Expected %o\n", file_mode, mode);
|
|
return -1;
|
|
}
|
|
int file_type = stat_buf.st_mode & S_IFMT;
|
|
if (file_type != S_IFREG) {
|
|
printf("Incorrect file type %o. Expected %o\n", file_type, S_IFREG);
|
|
return -1;
|
|
}
|
|
|
|
close(fd);
|
|
|
|
ret = truncate(FILE_NAME, TRUNC_LEN1);
|
|
if (ret < 0) {
|
|
printf("failed to truncate the file\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = stat(FILE_NAME, &stat_buf);
|
|
if (ret < 0) {
|
|
printf("failed to stat the file\n");
|
|
return ret;
|
|
}
|
|
|
|
file_size = stat_buf.st_size;
|
|
if (file_size != TRUNC_LEN1) {
|
|
printf("Incorrect file size %d. Expected %d\n", file_size, TRUNC_LEN1);
|
|
return -1;
|
|
}
|
|
|
|
printf("(f)truncate, (f)stat test successful\n");
|
|
return 0;
|
|
}
|