13 int make_tempfile(const std::string &contents)
15 char filename[] = "/tmp/cubemap.XXXXXX";
16 mode_t old_umask = umask(077);
17 int fd = mkstemp(filename);
20 log_perror("mkstemp");
24 if (unlink(filename) == -1) {
26 // Can still continue;
29 const char *ptr = contents.data();
30 size_t to_write = contents.size();
31 while (to_write > 0) {
32 ssize_t ret = write(fd, ptr, to_write);
46 bool read_tempfile_and_close(int fd, std::string *contents)
48 bool ok = read_tempfile(fd, contents);
49 safe_close(fd); // Implicitly deletes the file.
53 bool read_tempfile(int fd, std::string *contents)
55 ssize_t ret, has_read;
57 off_t len = lseek(fd, 0, SEEK_END);
63 contents->resize(len);
65 if (lseek(fd, 0, SEEK_SET) == -1) {
71 while (has_read < len) {
72 ret = read(fd, &((*contents)[has_read]), len - has_read);
78 log(ERROR, "Unexpected EOF!");
87 int safe_close(int fd)
92 } while (ret == -1 && errno == EINTR);
95 log_perror("close()");