podman

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//go:build !remote
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package libpod
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import (
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	"fmt"
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	"strings"
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	"github.com/containers/podman/v5/libpod/define"
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)
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// GetPodPidInformation returns process-related data of all processes in
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// the pod.  The output data can be controlled via the `descriptors`
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// argument which expects format descriptors and supports all AIXformat
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// descriptors of ps (1) plus some additional ones to for instance inspect the
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// set of effective capabilities.  Each element in the returned string slice
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// is a tab-separated string.
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//
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// For more details, please refer to github.com/containers/psgo.
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func (p *Pod) GetPodPidInformation(descriptors []string) ([]string, error) {
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	// Default to 'ps -ef' compatible descriptors
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	if len(strings.Join(descriptors, "")) == 0 {
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		descriptors = []string{"user", "pid", "ppid", "pcpu", "etime", "tty", "time", "args"}
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	}
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	jailNames := make([]string, 0)
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	ctrsInPod, err := p.AllContainers()
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	if err != nil {
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		return nil, err
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	}
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	for _, c := range ctrsInPod {
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		c.lock.Lock()
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		err := c.syncContainer()
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		c.lock.Unlock()
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		if err != nil {
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			return nil, err
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		}
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		if c.state.State == define.ContainerStateRunning {
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			jailName, err := c.jailName()
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			if err != nil {
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				return nil, fmt.Errorf("getting jail name: %w", err)
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			}
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			jailNames = append(jailNames, jailName)
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		}
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	}
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	// Also support comma-separated input.
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	psDescriptors := []string{}
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	for _, d := range descriptors {
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		for _, s := range strings.Split(d, ",") {
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			if s != "" {
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				psDescriptors = append(psDescriptors, s)
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			}
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		}
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	}
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	// For consistency with pod_top_linux.go, only allow descriptor names
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	for _, d := range psDescriptors {
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		if _, ok := isDescriptor[d]; !ok {
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			return nil, fmt.Errorf("unknown descriptor: %s", d)
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		}
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	}
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	args := []string{
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		"-J",
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		strings.Join(jailNames, ","),
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		"-ao",
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		strings.Join(psDescriptors, ","),
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	}
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	output, err := execPS(args)
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	if err != nil {
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		return nil, fmt.Errorf("executing ps(1): %w", err)
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	}
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	return output, nil
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}
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