pkg/specgen: Add stubs for non-linux builds

This introduces a local type rlimT which is used to convert runtime-spec
POSIXRlimit to platform-specific Rlimit structures - on FreeBSD rlimit
members are signed integers.

[NO NEW TESTS NEEDED]

Signed-off-by: Doug Rabson <dfr@rabson.org>

4 files changed, 55 insertions, 14 deletions

diff --git a/pkg/specgen/generate/config_unsupported.go b/pkg/specgen/generate/config_unsupported.go
new file mode 100644
index 000000000..a97ae0709
--- /dev/null
+++ b/pkg/specgen/generate/config_unsupported.go
@@ -0,0 +1,29 @@
+//go:build !linux
+// +build !linux
+
+package generate
+
+import (
+	"errors"
+
+	"github.com/containers/common/libimage"
+	"github.com/containers/podman/v4/pkg/specgen"
+	spec "github.com/opencontainers/runtime-spec/specs-go"
+	"github.com/opencontainers/runtime-tools/generate"
+)
+
+// DevicesFromPath computes a list of devices
+func DevicesFromPath(g *generate.Generator, devicePath string) error {
+	return errors.New("unsupported DevicesFromPath")
+}
+
+func BlockAccessToKernelFilesystems(privileged, pidModeIsHost bool, mask, unmask []string, g *generate.Generator) {
+}
+
+func supportAmbientCapabilities() bool {
+	return false
+}
+
+func getSeccompConfig(s *specgen.SpecGenerator, configSpec *spec.Spec, img *libimage.Image) (*spec.LinuxSeccomp, error) {
+	return nil, errors.New("not implemented getSeccompConfig")
+}
diff --git a/pkg/specgen/generate/oci.go b/pkg/specgen/generate/oci.go
index f59fe1011..a531494c9 100644
--- a/pkg/specgen/generate/oci.go
+++ b/pkg/specgen/generate/oci.go
@@ -58,38 +58,38 @@ func addRlimits(s *specgen.SpecGenerator, g *generate.Generator) {
 	// files and number of processes to the maximum they can be set to
 	// (without overriding a sysctl)
 	if !nofileSet {
-		max := define.RLimitDefaultValue
-		current := define.RLimitDefaultValue
+		max := rlimT(define.RLimitDefaultValue)
+		current := rlimT(define.RLimitDefaultValue)
 		if isRootless {
 			var rlimit unix.Rlimit
 			if err := unix.Getrlimit(unix.RLIMIT_NOFILE, &rlimit); err != nil {
 				logrus.Warnf("Failed to return RLIMIT_NOFILE ulimit %q", err)
 			}
-			if rlimit.Cur < current {
-				current = rlimit.Cur
+			if rlimT(rlimit.Cur) < current {
+				current = rlimT(rlimit.Cur)
 			}
-			if rlimit.Max < max {
-				max = rlimit.Max
+			if rlimT(rlimit.Max) < max {
+				max = rlimT(rlimit.Max)
 			}
 		}
-		g.AddProcessRlimits("RLIMIT_NOFILE", max, current)
+		g.AddProcessRlimits("RLIMIT_NOFILE", uint64(max), uint64(current))
 	}
 	if !nprocSet {
-		max := define.RLimitDefaultValue
-		current := define.RLimitDefaultValue
+		max := rlimT(define.RLimitDefaultValue)
+		current := rlimT(define.RLimitDefaultValue)
 		if isRootless {
 			var rlimit unix.Rlimit
 			if err := unix.Getrlimit(unix.RLIMIT_NPROC, &rlimit); err != nil {
 				logrus.Warnf("Failed to return RLIMIT_NPROC ulimit %q", err)
 			}
-			if rlimit.Cur < current {
-				current = rlimit.Cur
+			if rlimT(rlimit.Cur) < current {
+				current = rlimT(rlimit.Cur)
 			}
-			if rlimit.Max < max {
-				max = rlimit.Max
+			if rlimT(rlimit.Max) < max {
+				max = rlimT(rlimit.Max)
 			}
 		}
-		g.AddProcessRlimits("RLIMIT_NPROC", max, current)
+		g.AddProcessRlimits("RLIMIT_NPROC", uint64(max), uint64(current))
 	}
 }
 
diff --git a/pkg/specgen/generate/rlimit_int64.go b/pkg/specgen/generate/rlimit_int64.go
new file mode 100644
index 000000000..b4cce3453
--- /dev/null
+++ b/pkg/specgen/generate/rlimit_int64.go
@@ -0,0 +1,6 @@
+//go:build freebsd
+// +build freebsd
+
+package generate
+
+type rlimT int64
diff --git a/pkg/specgen/generate/rlimit_uint64.go b/pkg/specgen/generate/rlimit_uint64.go
new file mode 100644
index 000000000..d85f8dd2c
--- /dev/null
+++ b/pkg/specgen/generate/rlimit_uint64.go
@@ -0,0 +1,6 @@
+//go:build linux || darwin
+// +build linux darwin
+
+package generate
+
+type rlimT uint64