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util: make ExecComand return stdout and stderr as string

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Most consumers of util.ExecCommand() need to convert the returned []byte
format of stdout and/or stderr to string. By having util.ExecCommand()
return strings instead, the code gets a little simpler.

A few commands return JSON that needs to be parsed. These commands will
be replaced by go-ceph implementations later on. For now, convert the
strings back to []byte when needed.

Signed-off-by: Niels de Vos <ndevos@redhat.com>
This commit is contained in:
Niels de Vos
2020-07-22 14:53:22 +02:00
committed by mergify[bot]
parent ddac66d76b
commit 36469b87e2
6 changed files with 31 additions and 28 deletions
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12
internal/util/cephcmds.go
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@ -33,7 +33,7 @@ const InvalidPoolID int64 = -1
// ExecCommand executes passed in program with args and returns separate stdout
// and stderr streams. In case ctx is not set to context.TODO(), the command
// will be logged after it was executed.
func ExecCommand(ctx context.Context, program string, args ...string) (stdout, stderr []byte, err error) {
func ExecCommand(ctx context.Context, program string, args ...string) (string, string, error) {
var (
cmd = exec.Command(program, args...) // #nosec:G204, commands executing not vulnerable.
sanitizedArgs = StripSecretInArgs(args)
@ -44,19 +44,23 @@ func ExecCommand(ctx context.Context, program string, args ...string) (stdout, s
cmd.Stdout = &stdoutBuf
cmd.Stderr = &stderrBuf
if err := cmd.Run(); err != nil {
err := cmd.Run()
stdout := stdoutBuf.String()
stderr := stderrBuf.String()
if err != nil {
err = fmt.Errorf("an error (%w) occurred while running %s args: %v", err, program, sanitizedArgs)
if ctx != context.TODO() {
UsefulLog(ctx, "%s", err)
}
return stdoutBuf.Bytes(), stderrBuf.Bytes(), err
return stdout, stderr, err
}
if ctx != context.TODO() {
UsefulLog(ctx, "command succeeded: %s %v", program, sanitizedArgs)
}
return stdoutBuf.Bytes(), nil, nil
return stdout, stderr, nil
}
// GetPoolID fetches the ID of the pool that matches the passed in poolName