oddcoder
b5deadbeea
struct flock is posix defined locking mechanism on *nix platform Example usage (copied from https://gavv.github.io/articles/file-locks/) : #include <fcntl.h> struct flock fl; memset(&fl, 0, sizeof(fl)); // lock in shared mode fl.l_type = F_RDLCK; // lock entire file fl.l_whence = SEEK_SET; // offset base is start of the file fl.l_start = 0; // starting offset is zero fl.l_len = 0; // len is zero, which is a special value representing end // of file (no matter how large the file grows in future) fl.l_pid = 0; // F_SETLK(W) ignores it; F_OFD_SETLK(W) requires it to be zero // F_SETLKW specifies blocking mode if (fcntl(fd, F_SETLKW, &fl) == -1) { exit(1); } // atomically upgrade shared lock to exclusive lock, but only // for bytes in range [10; 15) // // after this call, the process will hold three lock regions: // [0; 10) - shared lock // [10; 15) - exclusive lock // [15; SEEK_END) - shared lock fl.l_type = F_WRLCK; fl.l_start = 10; fl.l_len = 5; // F_SETLKW specifies non-blocking mode if (fcntl(fd, F_SETLK, &fl) == -1) { exit(1); } // release lock for bytes in range [10; 15) fl.l_type = F_UNLCK; if (fcntl(fd, F_SETLK, &fl) == -1) { exit(1); } // close file and release locks for all regions // remember that locks are released when process calls close() // on any descriptor for a lock file close(fd);
relibc 
relibc is a portable POSIX C standard library written in Rust. It is under heavy development, and currently supports Redox and Linux.
The motivation for this project is twofold: Reduce issues the redox crew was having with newlib, and create a safer alternative to a C standard library written in C. It is mainly designed to be used under redox, as an alternative to newlib, but it also supports linux syscalls via the sc crate.
Contributing
Supported OSes
- Redox OS
- Linux
Supported architectures
- x86_64
- Aarch64