Module process

Process-associated operations.

Structs

Gid

gid_t—A Unix group ID.

Pid

pid_t—A non-zero Unix process ID.

Rlimit

struct rlimit—Current and maximum values used in getrlimit, setrlimit, and [prlimit].

Uid

uid_t—A Unix user ID.

WaitOptions

Options for modifying the behavior of wait/waitpid.

WaitStatus

The status of a child process after calling wait/waitpid.

WaitidOptions

Options for modifying the behavior of waitid.

WaitidStatus

The status of a process after calling waitid.

Enums

Resource

A resource value for use with getrlimit, setrlimit, and prlimit.

Signal

A signal number for use with kill_process, kill_process_group, and kill_current_process_group.

WaitId

The identifier to wait on in a call to waitid.

Constants

EXIT_FAILURE

EXIT_FAILURE for use with exit.

EXIT_SIGNALED_SIGABRT

The exit status used by a process terminated with a Signal::Abort signal.

EXIT_SUCCESS

EXIT_SUCCESS for use with exit.

Functions

chdir

chdir(path)—Change the current working directory.

chroot

chroot(path)—Change the process root directory.

fchdir

fchdir(fd)—Change the current working directory.

getcwd

getcwd—Return the current working directory.

getegid

getegid()—Returns the process’ effective group ID.

geteuid

geteuid()—Returns the process’ effective user ID.

getgid

getgid()—Returns the process’ real group ID.

getgroups

getgroups()—Return a list of the current user’s groups.

getpgid

getpgid(pid)—Returns the process group ID of the given process.

getpgrp

getpgrp()—Returns the process’ group ID.

getpid

getpid()—Returns the process’ ID.

getppid

getppid()—Returns the parent process’ ID.

getpriority_pgrp

getpriority(PRIO_PGRP, gid)—Get the scheduling priority of the given process group.

getpriority_process

getpriority(PRIO_PROCESS, pid)—Get the scheduling priority of the given process.

getpriority_user

getpriority(PRIO_USER, uid)—Get the scheduling priority of the given user.

getrlimit

getrlimit(resource)—Get a process resource limit value.

getsid

getsid(pid)—Get the session ID of the given process.

getuid

getuid()—Returns the process’ real user ID.

ioctl_tiocsctty

ioctl(fd, TIOCSCTTY, 0)—Sets the controlling terminal for the process.

kill_current_process_group

kill(0, sig)—Sends a signal to all processes in the current process group.

kill_process

kill(pid, sig)—Sends a signal to a process.

kill_process_group

kill(-pid, sig)—Sends a signal to all processes in a process group.

nice

nice(inc)—Adjust the scheduling priority of the current process.

sched_yield

sched_yield()—Hints to the OS that other processes should run.

setpgid

setpgid(pid, pgid)—Sets the process group ID of the given process.

setpriority_pgrp

setpriority(PRIO_PGRP, pgid)—Get the scheduling priority of the given process group.

setpriority_process

setpriority(PRIO_PROCESS, pid)—Get the scheduling priority of the given process.

setpriority_user

setpriority(PRIO_USER, uid)—Get the scheduling priority of the given user.

setrlimit

setrlimit(resource, new)—Set a process resource limit value.

setsid

setsid()—Create a new session.

test_kill_current_process_group

kill(0, 0)—Check validity of pid and permissions to send signals to the all processes in the current process group, without actually sending any signals.

test_kill_process

kill(pid, 0)—Check validity of pid and permissions to send signals to the process, without actually sending any signals.

test_kill_process_group

kill(-pid, 0)—Check validity of pid and permissions to send signals to all processes in the process group, without actually sending any signals.

umask

umask(mask)—Set the process file creation mask.

wait

wait(waitopts)—Wait for any of the children of calling process to change state.

waitid

waitid(_, _, _, opts)—Wait for the specified child process to change state.

waitpgid

waitpid(-pgid, waitopts)—Wait for a process in a specific process group to change state.

waitpid

waitpid(pid, waitopts)—Wait for a specific process to change state.

Type Aliases

RawGid

A group identifier as a raw integer.

RawPid

A process identifier as a raw integer.

RawUid

A user identifier as a raw integer.