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45 lines
1.7 KiB
Markdown
45 lines
1.7 KiB
Markdown
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# The wait builtin command
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## Synopsis
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wait [-f] [-n] [-p VARNAME] [ID...]
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## Description
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The `wait` builtin command is used to wait for job completion and return
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exit status.
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- if `ID` is a job specification, it waits for all processes in the
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pipeline of this job
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- waits for a specific job (asynchronous command) and report its exit
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status if one or more `ID` is given
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- waits for all running jobs (asynchronous commands)
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- waits for "the next" job (`-n` option)
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- waits for termination instead of status change (`-f` option)
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`ID` may be an operating system process identifier or a shell job
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specification.
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### Options
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| Option | Description |
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|:-------------|:--------------------------------------------------------------------------------------------------------------------------------|
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| `-n` | Waits for "the next" child to exit (as opposed to "all children" without this option). Accepts a list of IDs (jobs) |
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| `-f` | Waits for the termination of the given `ID` (instead of waiting for a status change only) |
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| `-p VARNAME` | When waiting for a list (-n) or all jobs, writes the job ID to the job that was actually terminated into the variable `VARNAME` |
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### Return status
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The return status is the return status of the job waited for, or
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| Status | Reason |
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|:-------|:------------------------------------------------|
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| 0 | waited for all jobs in shell's job list |
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| 1 | the given `ID` is not a valid job or process ID |
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## Examples
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## Portability considerations
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## See also
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