Add containers-common spec and command to podman

Since containers-common package is tied to specific versions
of Podman, add tools to build the package into the contrib directory
This should help other distributions to figure out which commont
package to ship.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

1 files changed, 118 insertions, 19 deletions

diff --git a/vendor/github.com/google/gofuzz/fuzz.go b/vendor/github.com/google/gofuzz/fuzz.go
index da0a5f938..761520a8c 100644
--- a/vendor/github.com/google/gofuzz/fuzz.go
+++ b/vendor/github.com/google/gofuzz/fuzz.go
@@ -22,6 +22,9 @@ import (
 	"reflect"
 	"regexp"
 	"time"
+
+	"github.com/google/gofuzz/bytesource"
+	"strings"
 )
 
 // fuzzFuncMap is a map from a type to a fuzzFunc that handles that type.
@@ -61,6 +64,34 @@ func NewWithSeed(seed int64) *Fuzzer {
 	return f
 }
 
+// NewFromGoFuzz is a helper function that enables using gofuzz (this
+// project) with go-fuzz (https://github.com/dvyukov/go-fuzz) for continuous
+// fuzzing. Essentially, it enables translating the fuzzing bytes from
+// go-fuzz to any Go object using this library.
+//
+// This implementation promises a constant translation from a given slice of
+// bytes to the fuzzed objects. This promise will remain over future
+// versions of Go and of this library.
+//
+// Note: the returned Fuzzer should not be shared between multiple goroutines,
+// as its deterministic output will no longer be available.
+//
+// Example: use go-fuzz to test the function `MyFunc(int)` in the package
+// `mypackage`. Add the file: "mypacakge_fuzz.go" with the content:
+//
+// // +build gofuzz
+// package mypacakge
+// import fuzz "github.com/google/gofuzz"
+// func Fuzz(data []byte) int {
+// 	var i int
+// 	fuzz.NewFromGoFuzz(data).Fuzz(&i)
+// 	MyFunc(i)
+// 	return 0
+// }
+func NewFromGoFuzz(data []byte) *Fuzzer {
+	return New().RandSource(bytesource.New(data))
+}
+
 // Funcs adds each entry in fuzzFuncs as a custom fuzzing function.
 //
 // Each entry in fuzzFuncs must be a function taking two parameters.
@@ -141,7 +172,7 @@ func (f *Fuzzer) genElementCount() int {
 }
 
 func (f *Fuzzer) genShouldFill() bool {
-	return f.r.Float64() > f.nilChance
+	return f.r.Float64() >= f.nilChance
 }
 
 // MaxDepth sets the maximum number of recursive fuzz calls that will be made
@@ -240,6 +271,7 @@ func (fc *fuzzerContext) doFuzz(v reflect.Value, flags uint64) {
 		fn(v, fc.fuzzer.r)
 		return
 	}
+
 	switch v.Kind() {
 	case reflect.Map:
 		if fc.fuzzer.genShouldFill() {
@@ -450,10 +482,10 @@ var fillFuncMap = map[reflect.Kind]func(reflect.Value, *rand.Rand){
 		v.SetFloat(r.Float64())
 	},
 	reflect.Complex64: func(v reflect.Value, r *rand.Rand) {
-		panic("unimplemented")
+		v.SetComplex(complex128(complex(r.Float32(), r.Float32())))
 	},
 	reflect.Complex128: func(v reflect.Value, r *rand.Rand) {
-		panic("unimplemented")
+		v.SetComplex(complex(r.Float64(), r.Float64()))
 	},
 	reflect.String: func(v reflect.Value, r *rand.Rand) {
 		v.SetString(randString(r))
@@ -465,38 +497,105 @@ var fillFuncMap = map[reflect.Kind]func(reflect.Value, *rand.Rand){
 
 // randBool returns true or false randomly.
 func randBool(r *rand.Rand) bool {
-	if r.Int()&1 == 1 {
-		return true
-	}
-	return false
+	return r.Int31()&(1<<30) == 0
+}
+
+type int63nPicker interface {
+	Int63n(int64) int64
 }
 
-type charRange struct {
-	first, last rune
+// UnicodeRange describes a sequential range of unicode characters.
+// Last must be numerically greater than First.
+type UnicodeRange struct {
+	First, Last rune
 }
 
+// UnicodeRanges describes an arbitrary number of sequential ranges of unicode characters.
+// To be useful, each range must have at least one character (First <= Last) and
+// there must be at least one range.
+type UnicodeRanges []UnicodeRange
+
 // choose returns a random unicode character from the given range, using the
 // given randomness source.
-func (r *charRange) choose(rand *rand.Rand) rune {
-	count := int64(r.last - r.first)
-	return r.first + rune(rand.Int63n(count))
+func (ur UnicodeRange) choose(r int63nPicker) rune {
+	count := int64(ur.Last - ur.First + 1)
+	return ur.First + rune(r.Int63n(count))
+}
+
+// CustomStringFuzzFunc constructs a FuzzFunc which produces random strings.
+// Each character is selected from the range ur. If there are no characters
+// in the range (cr.Last < cr.First), this will panic.
+func (ur UnicodeRange) CustomStringFuzzFunc() func(s *string, c Continue) {
+	ur.check()
+	return func(s *string, c Continue) {
+		*s = ur.randString(c.Rand)
+	}
 }
 
-var unicodeRanges = []charRange{
+// check is a function that used to check whether the first of ur(UnicodeRange)
+// is greater than the last one.
+func (ur UnicodeRange) check() {
+	if ur.Last < ur.First {
+		panic("The last encoding must be greater than the first one.")
+	}
+}
+
+// randString of UnicodeRange makes a random string up to 20 characters long.
+// Each character is selected form ur(UnicodeRange).
+func (ur UnicodeRange) randString(r *rand.Rand) string {
+	n := r.Intn(20)
+	sb := strings.Builder{}
+	sb.Grow(n)
+	for i := 0; i < n; i++ {
+		sb.WriteRune(ur.choose(r))
+	}
+	return sb.String()
+}
+
+// defaultUnicodeRanges sets a default unicode range when user do not set
+// CustomStringFuzzFunc() but wants fuzz string.
+var defaultUnicodeRanges = UnicodeRanges{
 	{' ', '~'},           // ASCII characters
 	{'\u00a0', '\u02af'}, // Multi-byte encoded characters
 	{'\u4e00', '\u9fff'}, // Common CJK (even longer encodings)
 }
 
+// CustomStringFuzzFunc constructs a FuzzFunc which produces random strings.
+// Each character is selected from one of the ranges of ur(UnicodeRanges).
+// Each range has an equal probability of being chosen. If there are no ranges,
+// or a selected range has no characters (.Last < .First), this will panic.
+// Do not modify any of the ranges in ur after calling this function.
+func (ur UnicodeRanges) CustomStringFuzzFunc() func(s *string, c Continue) {
+	// Check unicode ranges slice is empty.
+	if len(ur) == 0 {
+		panic("UnicodeRanges is empty.")
+	}
+	// if not empty, each range should be checked.
+	for i := range ur {
+		ur[i].check()
+	}
+	return func(s *string, c Continue) {
+		*s = ur.randString(c.Rand)
+	}
+}
+
+// randString of UnicodeRanges makes a random string up to 20 characters long.
+// Each character is selected form one of the ranges of ur(UnicodeRanges),
+// and each range has an equal probability of being chosen.
+func (ur UnicodeRanges) randString(r *rand.Rand) string {
+	n := r.Intn(20)
+	sb := strings.Builder{}
+	sb.Grow(n)
+	for i := 0; i < n; i++ {
+		sb.WriteRune(ur[r.Intn(len(ur))].choose(r))
+	}
+	return sb.String()
+}
+
 // randString makes a random string up to 20 characters long. The returned string
 // may include a variety of (valid) UTF-8 encodings.
 func randString(r *rand.Rand) string {
-	n := r.Intn(20)
-	runes := make([]rune, n)
-	for i := range runes {
-		runes[i] = unicodeRanges[r.Intn(len(unicodeRanges))].choose(r)
-	}
-	return string(runes)
+	return defaultUnicodeRanges.randString(r)
 }
 
 // randUint64 makes random 64 bit numbers.