System programming library; libjs — libc in JavaScript.

npm install libjs libsys

This library uses libsys to execute system calls from JavaScript. It expects your environment has libsys global object, in Node.js you can shim libsys as follows:

require('libsys/shim');

• Write to console
• Read from a file
• Run stat() on a file
• TCP echo server

• Synchronous system calls
  
  
  • Files — Standard file operations, which operate on most of the Linux/Unix file descriptors.
    • read — read from a file descriptor.
    • write — write to a file descriptor.
    • open — open a file.
    • close — close a file descriptor.
    • access — check user can access a file.
    • chmod — change file attributes.
    • fchmod — change file attributes.
    • chown — change file owner.
    • fchown — change file owner.
    • lchown — change file owner.
    • truncate — erase file contents.
    • ftruncate — erase file contents.
    • lseek — change cursor position.
    • rename — rename a file.
    • fsync — flush file to disk.
    • fdatasync — flush file to disk.
      
      
  • Stats — Fetches and returns statistics about a file.
    • stat — fetch statistics about a file.
    • lstat — fetch statistics about a file.
    • fstat — fetch statistics about a file.
      
      
  • Directories
    • mkdir — creat a directory.
    • mkdirat — create a directory relative to another directory.
    • rmdir — remove a directory.
    • getcwd — fetch current working directory.
    • getdents64 — scan through directory entries.
    • readdir — fetch all folder entries.
    • readdirList — fetch all folder entries.
      
      
  • Links
    • symlink — create a symbolic link.
    • unlink — remove a link.
    • readlink — read value of a symbolic link.
    • link — create a link.
      
      
  • Time
    • utime — change file last access and modification times.
    • utimes — change file last access and modification times.
      
      
  • Networking
    • socket — create a socket file descriptor.
    • connect — initiate a connection on a socket.
    • bind — assign an address to a socket.
    • listen — listen for new connections on a socket.
    • accept — accept a connection on a socket.
    • accept4 — accept a connection on a socket.
    • shutdown — shut down all or part of a full-duplex connection.
    • send — write data to a socket file descriptor.
    • sendto — write data to a socket file descriptor.
    • recv — read data from socket file descriptor.
    • recvfrom — read data from socket file descriptor.
    • setsockopt — get and set options on a socket.
      
      
  • Process
    • getpid — fetch process id.
    • getppid — fetch process id.
    • getuid — fetch user id.
    • geteuid — fetch user id.
    • getgid — fetch group id.
    • getegid — fetch group id.
    • sched_yield — yield execution to another thread.
    • nanosleep — put thread to sleep.
      
      
  • Events
    • fcntl — manipulate file descriptor.
    • epoll_create — create an epoll file descriptor.
    • epoll_create1 — create an epoll file descriptor.
    • epoll_wait — fetch epoll events.
    • epoll_ctl — control interface for an epoll file descriptor.
    • inotify_init
    • inotify_init1
    • inotify_add_watch
    • inotify_rm_watch
    • kqueue
    • kevent
    • EV_SET
      
      
  • Memory
    • mmap
    • munmap
    • mprotect
    • shmget
    • shmat
    • shmdt
    • shmctl
      
      
• Asynchronous system calls
  • Files: readAsync, writeAsync, openAsync, closeAsync, accessAsync, chmodAsync, fchmodAsync, chownAsync, fchownAsync, lchownAsync, truncateAsync, ftruncateAsync, lseekAsync, renameAsync, fsyncAsync, fdatasyncAsync  
  • Stats: statAsync, lstatAsync, and fstatAsync  
  • Directories: mkdirAsync, mkdiratAsync, rmdirAsync, getcwdAsync, getdents64Async, and readdirListAsync  
  • Links: symlinkAsync, unlinkAsync, readlinkAsync, and linkAsync  
  • Time: utimeAsync and utimesAsync  
  • Networking: socketAsync, connectAsync, bindAsync, listenAsync, acceptAsync, accept4Async, shutdownAsync, sendAsync and sendtoAsync,  
  • Process: getpidAsync, getppidAsync, getuidAsync, geteuidAsync, getgidAsync, and getegidAsync,  
• Structs
  • epoll_event and Iepoll_event
  • in_addr and Iin_addr
  • inotify_event and Iinotify_event
  • ipc_perm and Iipc_perm
  • ipv4 and Iipv4
  • linux_dirent64 and Ilinux_dirent64
  • shmid_ds and Ishmid_ds
  • sigaction and Isigaction
  • sockaddr and Isockaddr
  • sockaddr_in and Isockaddr_in
  • statStruct and IstatStruct
  • timespec and Itimespec
  • timeval and Itimeval
  • timevalarr and Itimevalarr
  • utimbuf and Iutimbuf
  • keventStruct and IkeventStruct
  • kevent64_sStruct and Ikevent64_sStruct
• Sockets
  • flip, htons32, hton16, htons, Ip, Ipv4, and Ipv6,
• Constants
  • AF, AMODE, BUS, CLD, DT, EPOLL, EPOLL_CTL, EPOLL_EVENTS, ERROR, EV, EVFILT, FCNTL, FD, FLAG, FPE, ILL, IN, IP, IPC, IPPROT, IPPROTO, IPV6, KEVENT, MAP, MCAST, MSG, NOTE, PF, POLL, PROT, S, SA, SEEK, SEGV, SHM, SHUT, SI, SIG, SIGEV, SO, SOCK, SOL, TRAP

Unlicense — public domain.