diff options
Diffstat (limited to 'docs/guides/process/spawn-stderr.md')
-rw-r--r-- | docs/guides/process/spawn-stderr.md | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/docs/guides/process/spawn-stderr.md b/docs/guides/process/spawn-stderr.md new file mode 100644 index 000000000..3ea56b24e --- /dev/null +++ b/docs/guides/process/spawn-stderr.md @@ -0,0 +1,31 @@ +--- +name: Read stderr from a child process +--- + +When using [`Bun.spawn()`](/docs/api/spawn), the child process inherits the `stderr` of the spawning process. If instead you'd prefer to read and handle `stderr`, set the `stderr` option to `"pipe"`. + +```ts +const proc = Bun.spawn(["echo", "hello"], { + stderr: "pipe", +}); +proc.stderr; // => ReadableStream +``` + +--- + +To read `stderr` until the child process exits, use the [`Bun.readableStreamToText()`](/docs/api/utils#bun-readablestreamto) convenience function. + +```ts +const proc = Bun.spawn(["echo", "hello"], { + stderr: "pipe", +}); + +const errors: string = await Bun.readableStreamToText(proc.stderr); +if (errors) { + // handle errors +} +``` + +--- + +See [Docs > API > Child processes](/docs/api/spawn) for complete documentation.. |