fail on error (#20)

ci-via-github-actions

vendor/github.com/docker/go-units/ulimit.go

@@ -0,0 +1,118 @@
+package units
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// Ulimit is a human friendly version of Rlimit.
+type Ulimit struct {
+	Name string
+	Hard int64
+	Soft int64
+}
+
+// Rlimit specifies the resource limits, such as max open files.
+type Rlimit struct {
+	Type int    `json:"type,omitempty"`
+	Hard uint64 `json:"hard,omitempty"`
+	Soft uint64 `json:"soft,omitempty"`
+}
+
+const (
+	// magic numbers for making the syscall
+	// some of these are defined in the syscall package, but not all.
+	// Also since Windows client doesn't get access to the syscall package, need to
+	//	define these here
+	rlimitAs         = 9
+	rlimitCore       = 4
+	rlimitCPU        = 0
+	rlimitData       = 2
+	rlimitFsize      = 1
+	rlimitLocks      = 10
+	rlimitMemlock    = 8
+	rlimitMsgqueue   = 12
+	rlimitNice       = 13
+	rlimitNofile     = 7
+	rlimitNproc      = 6
+	rlimitRss        = 5
+	rlimitRtprio     = 14
+	rlimitRttime     = 15
+	rlimitSigpending = 11
+	rlimitStack      = 3
+)
+
+var ulimitNameMapping = map[string]int{
+	//"as":         rlimitAs, // Disabled since this doesn't seem usable with the way Docker inits a container.
+	"core":       rlimitCore,
+	"cpu":        rlimitCPU,
+	"data":       rlimitData,
+	"fsize":      rlimitFsize,
+	"locks":      rlimitLocks,
+	"memlock":    rlimitMemlock,
+	"msgqueue":   rlimitMsgqueue,
+	"nice":       rlimitNice,
+	"nofile":     rlimitNofile,
+	"nproc":      rlimitNproc,
+	"rss":        rlimitRss,
+	"rtprio":     rlimitRtprio,
+	"rttime":     rlimitRttime,
+	"sigpending": rlimitSigpending,
+	"stack":      rlimitStack,
+}
+
+// ParseUlimit parses and returns a Ulimit from the specified string.
+func ParseUlimit(val string) (*Ulimit, error) {
+	parts := strings.SplitN(val, "=", 2)
+	if len(parts) != 2 {
+		return nil, fmt.Errorf("invalid ulimit argument: %s", val)
+	}
+
+	if _, exists := ulimitNameMapping[parts[0]]; !exists {
+		return nil, fmt.Errorf("invalid ulimit type: %s", parts[0])
+	}
+
+	var (
+		soft int64
+		hard = &soft // default to soft in case no hard was set
+		temp int64
+		err  error
+	)
+	switch limitVals := strings.Split(parts[1], ":"); len(limitVals) {
+	case 2:
+		temp, err = strconv.ParseInt(limitVals[1], 10, 64)
+		if err != nil {
+			return nil, err
+		}
+		hard = &temp
+		fallthrough
+	case 1:
+		soft, err = strconv.ParseInt(limitVals[0], 10, 64)
+		if err != nil {
+			return nil, err
+		}
+	default:
+		return nil, fmt.Errorf("too many limit value arguments - %s, can only have up to two, `soft[:hard]`", parts[1])
+	}
+
+	if soft > *hard {
+		return nil, fmt.Errorf("ulimit soft limit must be less than or equal to hard limit: %d > %d", soft, *hard)
+	}
+
+	return &Ulimit{Name: parts[0], Soft: soft, Hard: *hard}, nil
+}
+
+// GetRlimit returns the RLimit corresponding to Ulimit.
+func (u *Ulimit) GetRlimit() (*Rlimit, error) {
+	t, exists := ulimitNameMapping[u.Name]
+	if !exists {
+		return nil, fmt.Errorf("invalid ulimit name %s", u.Name)
+	}
+
+	return &Rlimit{Type: t, Soft: uint64(u.Soft), Hard: uint64(u.Hard)}, nil
+}
+
+func (u *Ulimit) String() string {
+	return fmt.Sprintf("%s=%d:%d", u.Name, u.Soft, u.Hard)
+}