| CreateShellArgV | Create a null-terminated array of strings from a command-line string | 
| FpAccess | Check file access | 
| FpAlarm | Schedule an alarm signal to be delivered | 
| FpChdir | Change current working directory. | 
| FpChmod | Change file permission bits | 
| FpChown | Change owner of file | 
| FpClose | Close file descriptor | 
| FpClosedir | Close directory file descriptor | 
| FpDup | Duplicate a file handle | 
| FpDup2 | Duplicate one file handle to another | 
| FpExecv | Execute process | 
| FpExecve | Execute process using environment | 
| FpExit | Exit the current process | 
| FpFcntl | File control operations. | 
| fpfdfillset | Set all file descriptors in the set. | 
| fpFD_CLR | Clears a file descriptor in a set | 
| fpFD_ISSET | Check whether a file descriptor is set | 
| fpFD_SET | Set a file descriptor in a set | 
| fpFD_ZERO | Clear all file descriptors in set | 
| FpFork | Create child process | 
| FPFStat | Retrieve file information about a file descriptor. | 
| FpFtruncate | Truncate file on certain size. | 
| FpGetcwd | Retrieve the current working directory. | 
| FpGetegid | Return effective group ID | 
| FpGetEnv | Return value of environment variable. | 
| fpgeterrno | Retrieve extended error information. | 
| FpGeteuid | Return effective user ID | 
| FpGetgid | Return real group ID | 
| FpGetgroups | Get the list of supplementary groups. | 
| FpGetpgrp | Get process group ID | 
| FpGetpid | Return current process ID | 
| FpGetppid | Return parent process ID | 
| fpGetPriority | Return process priority | 
| FpGetRLimit | Get process resource limits | 
| FpGetsid | Get current session ID | 
| FpGetuid | Return current user ID | 
| FpIOCtl | General kernel IOCTL call. | 
| FpKill | Send a signal to a process | 
| FpLink | Create a hard link to a file | 
| FpLseek | Set file pointer position. | 
| fpLstat | Return information about symbolic link. Do not follow the link | 
| FpMkdir | Create a new directory | 
| FpMkfifo | Create FIFO (named pipe) in file system | 
| Fpmmap | Create memory map of a file | 
| Fpmprotect |  | 
| Fpmunmap | Unmap previously mapped memory block | 
| FpNanoSleep | Suspend process for a short time | 
| fpNice | Set process priority | 
| FpOpen | Open file and return file descriptor | 
| FpOpendir | Open a directory for reading | 
| FpPause | Wait for a signal to arrive | 
| FpPipe | Create a set of pipe file handlers | 
| FpPoll | Poll a file descriptor for events. | 
| FpPRead | Positional read: read from file descriptor at a certain position. | 
| FpPWrite | Positional write: write to file descriptor at a certain position. | 
| FpRead | Read data from file descriptor | 
| FpReaddir | Read entry from directory | 
| fpReadLink | Read destination of symbolic link | 
| FpReadV | Vector read: Read into multiple buffers | 
| FpRename | Rename file | 
| FpRmdir | Remove a directory. | 
| fpSelect | Wait for events on file descriptors | 
| fpseterrno | Set extended error information. | 
| FpSetgid | Set the current group ID | 
| fpSetPriority | Set process priority | 
| FpSetRLimit | Set process resource limits | 
| FpSetsid | Create a new session. | 
| fpsettimeofday | Set kernel time | 
| FpSetuid | Set the current user ID | 
| FPSigaction | Install signal handler | 
| FpSigAddSet | Set a signal in a signal set. | 
| FpSigDelSet | Remove a signal from a signal set. | 
| FpsigEmptySet | Clear all signals from signal set. | 
| FpSigFillSet | Set all signals in signal set. | 
| FpSigIsMember | Check whether a signal appears in a signal set. | 
| FpSignal | Install signal handler (deprecated) | 
| FpSigPending | Return set of currently pending signals | 
| FpSigProcMask | Set list of blocked signals | 
| FpSigSuspend | Set signal mask and suspend process till signal is received | 
| FpSigTimedWait | Wait for signal, with timeout | 
| FpSleep | Suspend process for several seconds | 
| FpStat | Retrieve file information about a file descriptor. | 
| fpSymlink | Create a symbolic link | 
| fpS_ISBLK | Is file a block device | 
| fpS_ISCHR | Is file a character device | 
| fpS_ISDIR | Is file a directory | 
| fpS_ISFIFO | Is file a FIFO | 
| fpS_ISLNK | Is file a symbolic link | 
| fpS_ISREG | Is file a regular file | 
| fpS_ISSOCK | Is file a Unix socket | 
| fptime | Return the current Unix time | 
| FpTimes | Return execution times for the current process | 
| FpUmask | Set file creation mask. | 
| FpUname | Return system name. | 
| FpUnlink | Unlink (i.e. remove) a file. | 
| FpUtime | Set access and modification times of a file (touch). | 
| FpWait | Wait for a child to exit. | 
| FpWaitPid | Wait for a process to terminate | 
| FpWrite | Write data to file descriptor | 
| FpWriteV | Vector write: Write from multiple buffers to a file descriptor | 
| FreeShellArgV | Free the result of a CreateShellArgV  function | 
| wexitStatus | Extract the exit status from the fpWaitPID  result. | 
| wifexited | Check whether the process exited normally | 
| wifsignaled | Check whether the process was exited by a signal. | 
| wstopsig | Return the exit code from the process. | 
| wtermsig | Return the signal that caused a process to exit. |