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// +build linux
package libpod
import (
"strconv"
"strings"
"github.com/containers/libpod/libpod/define"
"github.com/containers/libpod/pkg/rootless"
"github.com/containers/psgo"
)
// GetPodPidInformation returns process-related data of all processes in
// the pod. The output data can be controlled via the `descriptors`
// argument which expects format descriptors and supports all AIXformat
// descriptors of ps (1) plus some additional ones to for instance inspect the
// set of effective capabilities. Eeach element in the returned string slice
// is a tab-separated string.
//
// For more details, please refer to github.com/containers/psgo.
func (p *Pod) GetPodPidInformation(descriptors []string) ([]string, error) {
p.lock.Lock()
defer p.lock.Unlock()
pids := make([]string, 0)
ctrsInPod, err := p.allContainers()
if err != nil {
return nil, err
}
for _, c := range ctrsInPod {
c.lock.Lock()
if err := c.syncContainer(); err != nil {
c.lock.Unlock()
return nil, err
}
if c.state.State == define.ContainerStateRunning {
pid := strconv.Itoa(c.state.PID)
pids = append(pids, pid)
}
c.lock.Unlock()
}
// Also support comma-separated input.
psgoDescriptors := []string{}
for _, d := range descriptors {
for _, s := range strings.Split(d, ",") {
if s != "" {
psgoDescriptors = append(psgoDescriptors, s)
}
}
}
// TODO: psgo returns a [][]string to give users the ability to apply
// filters on the data. We need to change the API here and the
// varlink API to return a [][]string if we want to make use of
// filtering.
opts := psgo.JoinNamespaceOpts{FillMappings: rootless.IsRootless()}
output, err := psgo.JoinNamespaceAndProcessInfoByPidsWithOptions(pids, psgoDescriptors, &opts)
if err != nil {
return nil, err
}
res := []string{}
for _, out := range output {
res = append(res, strings.Join(out, "\t"))
}
return res, nil
}
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