Module unistd

Safe wrappers around functions found in libc “unistd.h” header

Modules

alarm

Alarm signal scheduling.

Structs

AccessFlags

Options for access()

Pid

Process identifier

Enums

ForkResult

Represents the successful result of calling fork

UnlinkatFlags

Flags for unlinkat function.

Whence

Directive that tells lseek and lseek64 what the offset is relative to.

Functions

access

Checks the file named by path for accessibility according to the flags given by amode See access(2)

chdir

Change the current working directory of the calling process (see chdir(2)).

chroot

Change a process’s root directory

close

Close a file descriptor.

daemon

Daemonize this process by detaching from the controlling terminal (see daemon(3)).

dup

Create a copy of the specified file descriptor.

dup2

Create a copy of oldfd using newfd.

dup3

Create a new copy of the specified file descriptor using the specified fd and flags.

dup2_raw^⚠

Create a copy of oldfd with any fd value you want.

dup2_stderr

Duplicate fd with Stderr, i.e., Stderr redirection.

dup2_stdin

Duplicate fd with Stdin, i.e., Stdin redirection.

dup2_stdout

Duplicate fd with Stdout, i.e., Stdout redirection.

dup3_raw^⚠

Create a new copy of the specified file descriptor using the specified fd and flags.

eaccess

Checks the file named by path for accessibility according to the flags given by mode using effective UID, effective GID and supplementary group lists.

execv

Replace the current process image with a new one (see exec(3)).

execve

Replace the current process image with a new one (see execve(2)).

execveat

Execute program relative to a directory file descriptor (see execveat(2)).

execvp

Replace the current process image with a new one and replicate shell PATH searching behavior (see exec(3)).

execvpe

Replace the current process image with a new one and replicate shell PATH searching behavior (see execvpe(3)).

faccessat

Checks the file named by dirfd and path for accessibility according to the flags given by mode

fchdir

Change the current working directory of the process to the one given as an open file descriptor (see fchdir(2)).

fdatasync

Synchronize the data of a file

fexecve

Replace the current process image with a new one (see fexecve(2)).

fork^⚠

Create a new child process duplicating the parent process (see fork(2)).

fsync

Synchronize changes to a file

ftruncate

Truncate a file to a specified length

getcwd

Returns the current directory as a PathBuf

getpgid

Get process group

getpgrp

Get the group id of the calling process (see getpgrp(3)).

getpid

Get the pid of this process (see getpid(2)).

getppid

Get the pid of this processes’ parent (see getpid(2)).

getsid

Get the process group ID of a session leader getsid(2).

gettid

Get the caller’s thread ID (see gettid(2).

isatty

Determines if the file descriptor refers to a valid terminal type device.

linkat

Link one file to another file

lseek

Move the read/write file offset.

lseek64

Move the read/write file offset.

mkdir

Creates new directory path with access rights mode. (see mkdir(2))

mkfifo

Creates new FIFO special file (named pipe) with path path and access rights mode.

mkfifoat

Creates new FIFO special file (named pipe) with access rights set to mode in the path specified by dirfd and path.

mkstemp

Creates a regular file which persists even after process termination

pause

Suspend the thread until a signal is received.

pipe

Create an interprocess channel.

pipe2

Like pipe, but allows setting certain file descriptor flags.

pivot_root

Change the root file system.

read

Read from a raw file descriptor.

setpgid

Set a process group ID (see setpgid(2)).

setsid

Create new session and set process group id (see setsid(2)).

sleep

Suspend execution for an interval of time

symlinkat

Creates a symbolic link to path1 in the path specified by dirfd and path2.

sync

Commit filesystem caches to disk

syncfs

Commit filesystem caches containing file referred to by the open file descriptor fd to disk

truncate

Truncate a file to a specified length

unlink

Remove a directory entry

unlinkat

Remove a directory entry

write

Write to a raw file descriptor.

Type Aliases

LinkatFlags