system-call is used at run time in 8 crates (of which 1 optionally). It is a direct run-time dependency in 6 crates. It's used only as a dev dependency in 1 crate.

Depender (with downloads and own rev deps) system-call version
180 5 unix ^0.1
2 unix-tty ^0.1
1 unix-signal ^0.1.2
user-sync ^0.1
1 cursebox ^0.1.2
2 tempus optional ^0.1
850 6 null-terminated dev ^0.1