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package generate
import (
"strconv"
"strings"
"github.com/pkg/errors"
)
// EnvVariable "PODMAN_SYSTEMD_UNIT" is set in all generated systemd units and
// is set to the unit's (unique) name.
const EnvVariable = "PODMAN_SYSTEMD_UNIT"
// minTimeoutStopSec is the minimal stop timeout for generated systemd units.
// Once exceeded, processes of the services are killed and the cgroup(s) are
// cleaned up.
const minTimeoutStopSec = 60
// RestartPolicies includes all valid restart policies to be used in a unit
// file.
var RestartPolicies = []string{"no", "on-success", "on-failure", "on-abnormal", "on-watchdog", "on-abort", "always"}
// validateRestartPolicy checks that the user-provided policy is valid.
func validateRestartPolicy(restart string) error {
for _, i := range RestartPolicies {
if i == restart {
return nil
}
}
return errors.Errorf("%s is not a valid restart policy", restart)
}
const headerTemplate = `# {{{{.ServiceName}}}}.service
# autogenerated by Podman {{{{.PodmanVersion}}}}
{{{{- if .TimeStamp}}}}
# {{{{.TimeStamp}}}}
{{{{- end}}}}
[Unit]
Description=Podman {{{{.ServiceName}}}}.service
Documentation=man:podman-generate-systemd(1)
Wants=network.target
After=network-online.target
`
// filterPodFlags removes --pod and --pod-id-file from the specified command.
func filterPodFlags(command []string) []string {
processed := []string{}
for i := 0; i < len(command); i++ {
s := command[i]
if s == "--pod" || s == "--pod-id-file" {
i++
continue
}
if strings.HasPrefix(s, "--pod=") || strings.HasPrefix(s, "--pod-id-file=") {
continue
}
processed = append(processed, s)
}
return processed
}
// escapeSystemdArguments makes sure that all arguments with at least one whitespace
// are quoted to make sure those are interpreted as one argument instead of
// multiple ones. Also make sure to escape all characters which have a special
// meaning to systemd -> $,% and \
// see: https://www.freedesktop.org/software/systemd/man/systemd.service.html#Command%20lines
func escapeSystemdArguments(command []string) []string {
for i := range command {
command[i] = strings.ReplaceAll(command[i], "$", "$$")
command[i] = strings.ReplaceAll(command[i], "%", "%%")
if strings.ContainsAny(command[i], " \t") {
command[i] = strconv.Quote(command[i])
} else if strings.Contains(command[i], `\`) {
// strconv.Quote also escapes backslashes so
// we should replace only if strconv.Quote was not used
command[i] = strings.ReplaceAll(command[i], `\`, `\\`)
}
}
return command
}
func removeDetachArg(args []string, argCount int) []string {
// "--detach=false" could also be in the container entrypoint
// split them off so we do not remove it there
realArgs := args[len(args)-argCount:]
flagArgs := removeArg("-d=false", args[:len(args)-argCount])
flagArgs = removeArg("--detach=false", flagArgs)
return append(flagArgs, realArgs...)
}
func removeReplaceArg(args []string, argCount int) []string {
// "--replace=false" could also be in the container entrypoint
// split them off so we do not remove it there
realArgs := args[len(args)-argCount:]
flagArgs := removeArg("--replace=false", args[:len(args)-argCount])
return append(flagArgs, realArgs...)
}
func removeArg(arg string, args []string) []string {
newArgs := []string{}
for _, a := range args {
if a != arg {
newArgs = append(newArgs, a)
}
}
return newArgs
}
|
