Provides access to low-level system operations.
Classes
_class stat_result(object)
Functions
_abort()
Abort the current process.
_access(path,mask)
Determine if a file can be accessed.
Use the values F_OK, R_OK, W_OK, and X_OK to construct mask and check if the current process has sufficient access rights to perform the requested operations on the file at path.
_chdir(newcwd)
Change the current working directory.
Attempts to change the working directory to newcwd. Raises OSError on failure.
_close(fd)
Close an open file descriptor.
_dup(fd)
Duplicate a file descriptor.
Returns a new file descriptor pointing to the same file as fd.
_dup2(oldfd,newfd)
_execl(path,[args...])
Replace the current process.
The exec* family of functions replaces the calling process's image with a new one. execl takes a path to a binary and an arbitrary number of str arguments to pass to the new executable.
_execle(path,[args...],env)
_execlp(filename,[args...])
Replace the current process.
The exec* family of functions replaces the calling process's image with a new one. execlp takes a filename of a binary and an arbitrary number of str arguments to pass to the new executable. filename will be searched for in $PATH.
_execv(path,args)
_execvp(filename,args)
_exit()
Exit the current process.
_fork()
Fork the current process.
Returns the PID of the new child process in the original process and 0 in the child.
_get_terminal_size(fd=1)
Obtain the size of the terminal window. Obtain the size of the host terminal as a tuple of columns and lines.
_getcwd()
Get the name of the current working directory.
_getpid()
Obtain the system process identifier.
_isatty(fd)
Determine if a file descriptor is a terminal.
Returns a bool indicating whether the open file descriptor fd refers to a terminal.
_kill(pid,signum)
Send a signal to a process.
Send the signal signum to the process at pid.
_lseek(fd,pos,how)
Seek an open file descriptor.
Seeks the open file descriptor fd by pos bytes as specified in how. Use the values SEEK_SET, SEEK_CUR, and SEEK_END for how.
_mkdir(path,mode=0o777)
Create a directory.
Creates a directory at path.
_open(path,flags,mode=0o777)
Open a file.
Opens the file at path with the specified flags and mode. Returns a file descriptor.
_pipe()
Create a pipe.
Creates a pipe, returning a two-tuple of file descriptors for the read and write ends respectively.
_read(fd,n)
Read from an open file descriptor.
Reads at most n bytes from the open file descriptor fd.
_remove(path)
Delete a file.
Attempts to delete the file at path.
_stat(path)
_strerror(errorno)
Convert an integer error code to a string.
Provides the string description for the error code specified by errorno.
_symlink(src,dst)
Create a symbolic link.
Creates a symbolic link at src pointing to dst.
_system(cmd)
Call the system shell.
Runs cmd using the system shell and returns the platform-dependent return value.
_tcgetpgrp(fd)
Get the terminal foreground process group.
Return the PID representing the foreground process group of the terminal specified by the file descriptor fd.
_tcsetpgrp(fd,pgrp)
Set the terminal foreground process group.
Set the PID representing the foreground process group of the terminal specified by the file descriptor fd to pgrp.
_truncate(path,length)
Resize a file.
Attempts to resize the file at path to length bytes.
_ttyname(fd)
Get the path to a terminal device.
Returns a str representing the path to the terminal device provided by the file descriptor fd.
_uname()
Returns a dict of attributes describing the current platform.
On POSIX platforms, the result should match the contents and layout of a standard uname() call. On Windows, values are synthesized from available information.