89     int amt;  in read_snapshot_file()  local
92     amt = read(fd, &header, sizeof(header));  in read_snapshot_file()
93     if (amt != sizeof(header)) {  in read_snapshot_file()
96     bytesRead += amt;  in read_snapshot_file()
107         amt = read(fd, &file, sizeof(FileState));  in read_snapshot_file()
108         if (amt != sizeof(FileState)) {  in read_snapshot_file()
112         bytesRead += amt;  in read_snapshot_file()
119         amt = read(fd, filename, nameBufSize);  in read_snapshot_file()
120         if (amt == nameBufSize) {  in read_snapshot_file()
123         bytesRead += amt;  in read_snapshot_file()
127         if (amt != nameBufSize) {  in read_snapshot_file()
160     int amt;  in write_snapshot_file()  local
163     amt = write(fd, &header, sizeof(header));  in write_snapshot_file()
164     if (amt != sizeof(header)) {  in write_snapshot_file()
175             amt = write(fd, &r.s, sizeof(FileState));  in write_snapshot_file()
176             if (amt != sizeof(FileState)) {  in write_snapshot_file()
182             amt = write(fd, name.string(), nameLen);  in write_snapshot_file()
183             if (amt != nameLen) {  in write_snapshot_file()
190                 amt = write(fd, &padding, paddingLen);  in write_snapshot_file()
191                 if (amt != paddingLen) {  in write_snapshot_file()
218     int amt;  in write_update_file()  local
251     while ((amt = read(fd, buf, bufsize)) != 0 && bytesLeft > 0) {  in write_update_file()
252         bytesLeft -= amt;  in write_update_file()
254             amt += bytesLeft; // Plus a negative is minus.  Don't write more than we promised.  in write_update_file()
256         err = dataStream->WriteEntityData(buf, amt);  in write_update_file()
268                 amt = bytesLeft < bufsize ? bytesLeft : bufsize;  in write_update_file()
269                 bytesLeft -= amt;  in write_update_file()
270                 err = dataStream->WriteEntityData(buf, amt);  in write_update_file()
314     int amt;  in compute_crc32()  local
321     while ((amt = read(fd, buf, bufsize)) != 0) {  in compute_crc32()
322         crc = crc32(crc, (Bytef*)buf, amt);  in compute_crc32()
749     ssize_t amt;  in WriteFile()  local
763     amt = in->ReadEntityData(&metadata, sizeof(metadata));  in WriteFile()
764     if (amt != sizeof(metadata)) {  in WriteFile()
766                 (long)amt, strerror(errno));  in WriteFile()
788     while ((amt = in->ReadEntityData(buf, RESTORE_BUF_SIZE)) > 0) {  in WriteFile()
789         err = write(fd, buf, amt);  in WriteFile()
790         if (err != amt) {  in WriteFile()
795         crc = crc32(crc, (Bytef*)buf, amt);  in WriteFile()
834     int amt;  in write_text_file()  local
845     amt = write(fd, data, len);  in write_text_file()
846     if (amt != len) {  in write_text_file()
860     int amt;  in compare_file()  local
875     amt = lseek(fd, 0, SEEK_END);  in compare_file()
876     if (amt != len) {  in compare_file()
877         fprintf(stderr, "compare_file file length should be %d, was %d\n", len, amt);  in compare_file()
882     int readLen = amt < len ? amt : len;  in compare_file()
883     amt = read(fd, contents, readLen);  in compare_file()
884     if (amt != readLen) {  in compare_file()
885         fprintf(stderr, "compare_file read expected %d bytes but got %d\n", len, amt);  in compare_file()