Module nix::unistd

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

Modules

acct

alarm

Alarm signal scheduling.

Structs

Gid

Group identifier

Pid

Process identifier

Uid

User identifier

Enums

FchownatFlags

Flags for fchownat function.

ForkResult

Represents the successful result of calling fork

PathconfVar

Variable names for pathconf

SysconfVar

Variable names for sysconf

Whence

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

Constants

ROOT

Constant for UID = 0

Functions

chdir

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

chown

Change the ownership of the file at path to be owned by the specified owner (user) and group (see chown(2)).

chroot

close

Close a raw file descriptor

daemon

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

dup

Create a copy of the specified file descriptor (see dup(2)).

dup2

Create a copy of the specified file descriptor using the specified fd (see dup(2)).

dup3

Create a new copy of the specified file descriptor using the specified fd and flags (see dup(2)).

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)).

fchdir

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

fchownat

Change the ownership of the file at path to be owned by the specified owner (user) and group.

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)).

fpathconf

Like pathconf, but works with file descriptors instead of paths (see fpathconf(2))

fsync

Synchronize changes to a file

ftruncate

Truncate a file to a specified length

getcwd

Returns the current directory as a PathBuf

getegid

Get the effective group ID

geteuid

Get the effective user ID

getgid

Get the real group ID

getgrouplist

Calculate the supplementary group access list.

getgroups

Get the list of supplementary group IDs of the calling process.

gethostname

Get the host name and store it in the provided buffer, returning a pointer the CStr in that buffer on success (see gethostname(2)).

getpgid

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).

getuid

Get a real user ID

initgroups

Initialize the supplementary group access list.

isatty

lseek

Move the read/write file offset.

lseek64

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.

mkstemp

Creates a regular file which persists even after process termination

pathconf

Get path-dependent configurable system variables (see pathconf(2))

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

read

Read from a raw file descriptor.

setgid

Set the user ID

setgroups

Set the list of supplementary group IDs for the calling process.

sethostname

Set the system host name (see sethostname(2)).

setpgid

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

setresgid

Sets the real, effective, and saved gid. (see setresuid(2))

setresuid

Sets the real, effective, and saved uid. (see setresuid(2))

setsid

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

setuid

Set the user ID

sleep

Suspend execution for an interval of time

sync

Commit filesystem caches to disk

sysconf

Get configurable system variables (see sysconf(3))

tcgetpgrp

Get the terminal foreground process group (see tcgetpgrp(3)).

tcsetpgrp

Set the terminal foreground process group (see tcgetpgrp(3)).

truncate

Truncate a file to a specified length

unlink

Remove a directory entry

write

Write to a raw file descriptor.