Add a few more tests for ttyname and getcwd.
#3230
| Job | Run time |
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| 8m 34s | |
| 15m 35s | |
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| 29s | |
| 1m 35s | |
| 5s | |
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| 1m 36s | |
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| 2m 38s | |
| 1m 29s | |
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| 1m 33s | |
| 1m 58s | |
| 1m 1s | |
| 4m 45s | |
| 1m 23s | |
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| 1m 39s | |
| 3m 20s | |
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| 4m 40s | |
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| 4m 30s | |
| 4m 48s | |
| 1m 39s | |
| 1m 30s | |
| 1m 17s | |
| 1m 29s | |
| 2h 2m 55s |