Add hooks support to podman

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

Closes: #155
Approved by: mheon

4 files changed, 403 insertions, 0 deletions

diff --git a/vendor/github.com/mrunalp/fileutils/LICENSE b/vendor/github.com/mrunalp/fileutils/LICENSE
new file mode 100644
index 000000000..27448585a
--- /dev/null
+++ b/vendor/github.com/mrunalp/fileutils/LICENSE
@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2014 Docker, Inc.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/github.com/mrunalp/fileutils/README.md b/vendor/github.com/mrunalp/fileutils/README.md
new file mode 100644
index 000000000..6cb4140ea
--- /dev/null
+++ b/vendor/github.com/mrunalp/fileutils/README.md
@@ -0,0 +1,5 @@
+# fileutils
+
+Collection of utilities for file manipulation in golang
+
+The library is based on docker pkg/archive pkg/idtools but does copies instead of handling archive formats.
diff --git a/vendor/github.com/mrunalp/fileutils/fileutils.go b/vendor/github.com/mrunalp/fileutils/fileutils.go
new file mode 100644
index 000000000..5a9818a24
--- /dev/null
+++ b/vendor/github.com/mrunalp/fileutils/fileutils.go
@@ -0,0 +1,158 @@
+package fileutils
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"syscall"
+)
+
+// CopyFile copies the file at source to dest
+func CopyFile(source string, dest string) error {
+	si, err := os.Lstat(source)
+	if err != nil {
+		return err
+	}
+
+	st, ok := si.Sys().(*syscall.Stat_t)
+	if !ok {
+		return fmt.Errorf("could not convert to syscall.Stat_t")
+	}
+
+	uid := int(st.Uid)
+	gid := int(st.Gid)
+
+	// Handle symlinks
+	if si.Mode()&os.ModeSymlink != 0 {
+		target, err := os.Readlink(source)
+		if err != nil {
+			return err
+		}
+		if err := os.Symlink(target, dest); err != nil {
+			return err
+		}
+	}
+
+	// Handle device files
+	if st.Mode&syscall.S_IFMT == syscall.S_IFBLK || st.Mode&syscall.S_IFMT == syscall.S_IFCHR {
+		devMajor := int64(major(uint64(st.Rdev)))
+		devMinor := int64(minor(uint64(st.Rdev)))
+		mode := uint32(si.Mode() & 07777)
+		if st.Mode&syscall.S_IFMT == syscall.S_IFBLK {
+			mode |= syscall.S_IFBLK
+		}
+		if st.Mode&syscall.S_IFMT == syscall.S_IFCHR {
+			mode |= syscall.S_IFCHR
+		}
+		if err := syscall.Mknod(dest, mode, int(mkdev(devMajor, devMinor))); err != nil {
+			return err
+		}
+	}
+
+	// Handle regular files
+	if si.Mode().IsRegular() {
+		sf, err := os.Open(source)
+		if err != nil {
+			return err
+		}
+		defer sf.Close()
+
+		df, err := os.Create(dest)
+		if err != nil {
+			return err
+		}
+		defer df.Close()
+
+		_, err = io.Copy(df, sf)
+		if err != nil {
+			return err
+		}
+	}
+
+	// Chown the file
+	if err := os.Lchown(dest, uid, gid); err != nil {
+		return err
+	}
+
+	// Chmod the file
+	if !(si.Mode()&os.ModeSymlink == os.ModeSymlink) {
+		if err := os.Chmod(dest, si.Mode()); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// CopyDirectory copies the files under the source directory
+// to dest directory. The dest directory is created if it
+// does not exist.
+func CopyDirectory(source string, dest string) error {
+	fi, err := os.Stat(source)
+	if err != nil {
+		return err
+	}
+
+	// Get owner.
+	st, ok := fi.Sys().(*syscall.Stat_t)
+	if !ok {
+		return fmt.Errorf("could not convert to syscall.Stat_t")
+	}
+
+	// We have to pick an owner here anyway.
+	if err := MkdirAllNewAs(dest, fi.Mode(), int(st.Uid), int(st.Gid)); err != nil {
+		return err
+	}
+
+	return filepath.Walk(source, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+
+		// Get the relative path
+		relPath, err := filepath.Rel(source, path)
+		if err != nil {
+			return nil
+		}
+
+		if info.IsDir() {
+			// Skip the source directory.
+			if path != source {
+				// Get the owner.
+				st, ok := info.Sys().(*syscall.Stat_t)
+				if !ok {
+					return fmt.Errorf("could not convert to syscall.Stat_t")
+				}
+
+				uid := int(st.Uid)
+				gid := int(st.Gid)
+
+				if err := os.Mkdir(filepath.Join(dest, relPath), info.Mode()); err != nil {
+					return err
+				}
+
+				if err := os.Lchown(filepath.Join(dest, relPath), uid, gid); err != nil {
+					return err
+				}
+			}
+			return nil
+		}
+
+		return CopyFile(path, filepath.Join(dest, relPath))
+	})
+}
+
+// Gives a number indicating the device driver to be used to access the passed device
+func major(device uint64) uint64 {
+	return (device >> 8) & 0xfff
+}
+
+// Gives a number that serves as a flag to the device driver for the passed device
+func minor(device uint64) uint64 {
+	return (device & 0xff) | ((device >> 12) & 0xfff00)
+}
+
+func mkdev(major int64, minor int64) uint32 {
+	return uint32(((minor & 0xfff00) << 12) | ((major & 0xfff) << 8) | (minor & 0xff))
+}
diff --git a/vendor/github.com/mrunalp/fileutils/idtools.go b/vendor/github.com/mrunalp/fileutils/idtools.go
new file mode 100644
index 000000000..161aec8f5
--- /dev/null
+++ b/vendor/github.com/mrunalp/fileutils/idtools.go
@@ -0,0 +1,49 @@
+package fileutils
+
+import (
+	"os"
+	"path/filepath"
+)
+
+// MkdirAllNewAs creates a directory (include any along the path) and then modifies
+// ownership ONLY of newly created directories to the requested uid/gid. If the
+// directories along the path exist, no change of ownership will be performed
+func MkdirAllNewAs(path string, mode os.FileMode, ownerUID, ownerGID int) error {
+	// make an array containing the original path asked for, plus (for mkAll == true)
+	// all path components leading up to the complete path that don't exist before we MkdirAll
+	// so that we can chown all of them properly at the end.  If chownExisting is false, we won't
+	// chown the full directory path if it exists
+	var paths []string
+	if _, err := os.Stat(path); err != nil && os.IsNotExist(err) {
+		paths = []string{path}
+	} else if err == nil {
+		// nothing to do; directory path fully exists already
+		return nil
+	}
+
+	// walk back to "/" looking for directories which do not exist
+	// and add them to the paths array for chown after creation
+	dirPath := path
+	for {
+		dirPath = filepath.Dir(dirPath)
+		if dirPath == "/" {
+			break
+		}
+		if _, err := os.Stat(dirPath); err != nil && os.IsNotExist(err) {
+			paths = append(paths, dirPath)
+		}
+	}
+
+	if err := os.MkdirAll(path, mode); err != nil && !os.IsExist(err) {
+		return err
+	}
+
+	// even if it existed, we will chown the requested path + any subpaths that
+	// didn't exist when we called MkdirAll
+	for _, pathComponent := range paths {
+		if err := os.Chown(pathComponent, ownerUID, ownerGID); err != nil {
+			return err
+		}
+	}
+	return nil
+}