chpst 命令

常用示例

说明

chpst changes the process state according to the given options and runs prog. It is part of the runit service supervision suite and provides a standardized way to set user, limits, and environment for service processes. The tool consolidates several common process modifications: changing user/group identity, setting resource limits, loading environment from files, and obtaining locks. This simplifies service run scripts that would otherwise need multiple commands. Environment directories (used with -e) contain files named for environment variables, with file contents as values. This pattern is common in runit and daemontools service management.

参数

-u _user:group_

Set UID and GID before running command.

-e _directory_

Set environment variables from files in directory.

-m _bytes_

Limit data segment, stack, and locked memory.

-d _bytes_

Limit data segment size.

-o _n_

Limit number of open file descriptors.

-p _n_

Limit number of processes.

-f _bytes_

Limit output file size.

-c _bytes_

Limit core dump size.

-n _inc_

Adjust nice level.

-/ _dir_

Change root directory (chroot).

-C _pwd_

Change working directory to pwd before starting prog. Combined with -/, the directory is changed after chroot.

-b _argv0_

Run prog with argv0 as its 0th argument.

-l _lock_

Open lock for writing, obtain an exclusive lock, and fail immediately if lock is held by another process.

-L _lock_

Open lock for writing, obtain an exclusive lock, and wait if lock is held by another process.

-P

Run prog in a new process group.

-0, -1, -2

Close standard input (0), standard output (1), or standard error (2) before starting prog.

-v

Print verbose messages to standard error.