ssize_t safe_pread_exact(int fd, void *b, size_t c, off_t off)
{
int ret = safe_pread(fd, b, c, off);
if (ret < 0)
return ret;
if (ret != (int)c)
return -EDOM;
return 0;
}
ssize_t safe_pread_exact(int fd, void *buf, size_t count, off_t offset)
{
ssize_t ret = safe_pread(fd, buf, count, offset);
if (ret < 0)
return ret;
if ((size_t)ret != count)
return -EDOM;
return 0;
}
ssize_t simple_io_read_whole_file_zt(const char *fname, char *buf, int sz)
{
ssize_t res;
int fd = open(fname, O_RDONLY);
if (fd < 0) {
int err = errno;
return -err;
}
memset(buf, 0, sz);
if (sz == 0)
return 0;
res = safe_pread(fd, buf, sz - 1, 0);
if (res < 0) {
close(fd);
return res;
}
close(fd);
return res;
}
