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https://github.com/fleetdm/fleet
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87f4a28419
> Related issue: #19886 # Checklist for submitter If some of the following don't apply, delete the relevant line. <!-- Note that API documentation changes are now addressed by the product design team. --> - [x] Changes file added for user-visible changes in `changes/`, `orbit/changes/` or `ee/fleetd-chrome/changes`. See [Changes files](https://fleetdm.com/docs/contributing/committing-changes#changes-files) for more information. - [x] Added/updated tests - [x] Manual QA for all new/changed functionality - For Orbit and Fleet Desktop changes: - [x] Manual QA must be performed in the three main OSs, macOS, Windows and Linux. - [x] Auto-update manual QA, from released version of component to new version (see [tools/tuf/test](../tools/tuf/test/README.md)).
60 lines
1.7 KiB
Go
60 lines
1.7 KiB
Go
// based on github.com/kolide/launcher/pkg/osquery/tables
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package tablehelpers
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// based on https://github.com/fleetdm/launcher/blob/main/pkg/osquery/tables/tablehelpers
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import (
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"bytes"
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"context"
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"fmt"
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"os"
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"os/exec"
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"time"
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"github.com/rs/zerolog"
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)
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// Exec is a wrapper over exec.CommandContext. It does a couple of
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// additional things to help with table usage:
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// 1. It enforces a timeout.
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// 2. Second, it accepts an array of possible binaries locations, and if something is not
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// found, it will go down the list.
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// 3. It moves the stderr into the return error, if needed.
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//
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// This is not suitable for high performance work -- it allocates new buffers each time.
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func Exec(ctx context.Context, log zerolog.Logger, timeoutSeconds int, possibleBins []string, args []string, includeStderr bool) ([]byte, error) {
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ctx, cancel := context.WithTimeout(ctx, time.Duration(timeoutSeconds)*time.Second)
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defer cancel()
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var stdout bytes.Buffer
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var stderr bytes.Buffer
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for _, bin := range possibleBins {
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stdout.Reset()
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stderr.Reset()
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cmd := exec.CommandContext(ctx, bin, args...)
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cmd.Stdout = &stdout
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if includeStderr {
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cmd.Stderr = &stdout
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} else {
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cmd.Stderr = &stderr
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}
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log.Debug().Str("cmd", cmd.String()).Msg("execing")
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switch err := cmd.Run(); {
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case err == nil:
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return stdout.Bytes(), nil
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case os.IsNotExist(err):
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// try the next binary
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continue
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default:
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// an actual error
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return nil, fmt.Errorf("exec '%s'. Got: '%s': %w", cmd.String(), string(stderr.Bytes()), err)
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}
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}
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// Getting here means no binary was found
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return nil, fmt.Errorf("No binary found in specified paths: %v: %w", possibleBins, os.ErrNotExist)
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}
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