| # usually behave like "head -n 1" | |
| a | |
| ret: 0 | |
| # never consume more than one line | |
| 1 | |
| 2 | |
| ret: 0 | |
| # add a newline | |
| abc | |
| ret: 1 | |
| # print one newline on empty input | |
| ret: 1 | |
| # add a newline, return 1 when EOF | |
| xyz | |
| ret: 1 | |
| # print one newline on empty input, return 1 when EOF | |
| ret: 1 | |
| # large line of zero bytes | |
| 00000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| | |
| * | |
| 00100000 0a |.| | |
| 00100001 | |
| ret: 0 |