How to use WriteFile method of osutil Package

Best Syzkaller code snippet using osutil.WriteFile

synctree_test.go

Source:synctree_test.go Github

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...34}35func (s *EnsureTreeStateSuite) TestVerifiesExpectedFiles(c *C) {36 c.Assert(os.MkdirAll(filepath.Join(s.dir, "foo", "bar"), 0755), IsNil)37 name := filepath.Join(s.dir, "foo", "bar", "expected.snap")38 c.Assert(ioutil.WriteFile(name, []byte("expected"), 0600), IsNil)39 changed, removed, err := osutil.EnsureTreeState(s.dir, s.globs, map[string]map[string]osutil.FileState{40 "foo/bar": {41 "expected.snap": &osutil.MemoryFileState{Content: []byte("expected"), Mode: 0600},42 },43 })44 c.Assert(err, IsNil)45 c.Check(changed, HasLen, 0)46 c.Check(removed, HasLen, 0)47 // The content and permissions are correct48 c.Check(name, testutil.FileEquals, "expected")49 stat, err := os.Stat(name)50 c.Assert(err, IsNil)51 c.Check(stat.Mode().Perm(), Equals, os.FileMode(0600))52}53func (s *EnsureTreeStateSuite) TestCreatesMissingFiles(c *C) {54 c.Assert(os.MkdirAll(filepath.Join(s.dir, "foo"), 0755), IsNil)55 changed, removed, err := osutil.EnsureTreeState(s.dir, s.globs, map[string]map[string]osutil.FileState{56 "foo": {57 "missing1.snap": &osutil.MemoryFileState{Content: []byte(`content-1`), Mode: 0600},58 },59 "bar": {60 "missing2.snap": &osutil.MemoryFileState{Content: []byte(`content-2`), Mode: 0600},61 },62 })63 c.Assert(err, IsNil)64 c.Check(changed, DeepEquals, []string{"bar/missing2.snap", "foo/missing1.snap"})65 c.Check(removed, HasLen, 0)66}67func (s *EnsureTreeStateSuite) TestRemovesUnexpectedFiles(c *C) {68 c.Assert(os.MkdirAll(filepath.Join(s.dir, "foo"), 0755), IsNil)69 c.Assert(os.MkdirAll(filepath.Join(s.dir, "bar"), 0755), IsNil)70 name1 := filepath.Join(s.dir, "foo", "evil1.snap")71 name2 := filepath.Join(s.dir, "bar", "evil2.snap")72 c.Assert(ioutil.WriteFile(name1, []byte(`evil-1`), 0600), IsNil)73 c.Assert(ioutil.WriteFile(name2, []byte(`evil-2`), 0600), IsNil)74 changed, removed, err := osutil.EnsureTreeState(s.dir, s.globs, map[string]map[string]osutil.FileState{75 "foo": {},76 })77 c.Assert(err, IsNil)78 c.Check(changed, HasLen, 0)79 c.Check(removed, DeepEquals, []string{"bar/evil2.snap", "foo/evil1.snap"})80 c.Check(name1, testutil.FileAbsent)81 c.Check(name2, testutil.FileAbsent)82}83func (s *EnsureTreeStateSuite) TestRemovesEmptyDirectories(c *C) {84 c.Assert(os.MkdirAll(filepath.Join(s.dir, "foo"), 0755), IsNil)85 c.Assert(os.MkdirAll(filepath.Join(s.dir, "bar", "baz"), 0755), IsNil)86 name1 := filepath.Join(s.dir, "foo", "file1.snap")87 name2 := filepath.Join(s.dir, "foo", "unrelated")88 name3 := filepath.Join(s.dir, "bar", "baz", "file2.snap")89 c.Assert(ioutil.WriteFile(name1, []byte(`text`), 0600), IsNil)90 c.Assert(ioutil.WriteFile(name2, []byte(`text`), 0600), IsNil)91 c.Assert(ioutil.WriteFile(name3, []byte(`text`), 0600), IsNil)92 _, _, err := osutil.EnsureTreeState(s.dir, s.globs, nil)93 c.Assert(err, IsNil)94 // The "foo" directory is still present, while the "bar" tree95 // has been removed.96 c.Check(filepath.Join(s.dir, "foo"), testutil.FilePresent)97 c.Check(filepath.Join(s.dir, "bar"), testutil.FileAbsent)98}99func (s *EnsureTreeStateSuite) TestIgnoresUnrelatedFiles(c *C) {100 c.Assert(os.MkdirAll(filepath.Join(s.dir, "foo"), 0755), IsNil)101 name := filepath.Join(s.dir, "foo", "unrelated")102 err := ioutil.WriteFile(name, []byte(`text`), 0600)103 c.Assert(err, IsNil)104 changed, removed, err := osutil.EnsureTreeState(s.dir, s.globs, map[string]map[string]osutil.FileState{})105 c.Assert(err, IsNil)106 // Report says that nothing has changed107 c.Check(changed, HasLen, 0)108 c.Check(removed, HasLen, 0)109 // The file is still there110 c.Check(name, testutil.FilePresent)111}112func (s *EnsureTreeStateSuite) TestErrorsOnBadGlob(c *C) {113 _, _, err := osutil.EnsureTreeState(s.dir, []string{"["}, nil)114 c.Check(err, ErrorMatches, `internal error: EnsureTreeState got invalid pattern "\[": syntax error in pattern`)115}116func (s *EnsureTreeStateSuite) TestErrorsOnDirectoryPathsMatchingGlobs(c *C) {117 _, _, err := osutil.EnsureTreeState(s.dir, s.globs, map[string]map[string]osutil.FileState{118 "foo/bar.snap/baz": nil,119 })120 c.Check(err, ErrorMatches, `internal error: EnsureTreeState got path "foo/bar.snap/baz" that matches glob pattern "\*.snap"`)121}122func (s *EnsureTreeStateSuite) TestErrorsOnFilenamesWithSlashes(c *C) {123 _, _, err := osutil.EnsureTreeState(s.dir, s.globs, map[string]map[string]osutil.FileState{124 "foo": {125 "dir/file1.snap": &osutil.MemoryFileState{Content: []byte(`content-1`), Mode: 0600},126 },127 })128 c.Check(err, ErrorMatches, `internal error: EnsureTreeState got filename "dir/file1.snap" in "foo", which has a path component`)129}130func (s *EnsureTreeStateSuite) TestErrorsOnFilenamesNotMatchingGlobs(c *C) {131 _, _, err := osutil.EnsureTreeState(s.dir, s.globs, map[string]map[string]osutil.FileState{132 "foo": {133 "file1.not-snap": &osutil.MemoryFileState{Content: []byte(`content-1`), Mode: 0600},134 },135 })136 c.Check(err, ErrorMatches, `internal error: EnsureTreeState got filename "file1.not-snap" in "foo", which doesn't match any glob patterns \["\*.snap"\]`)137}138func (s *EnsureTreeStateSuite) TestRemovesFilesOnError(c *C) {139 c.Assert(os.MkdirAll(filepath.Join(s.dir, "foo"), 0755), IsNil)140 c.Assert(os.MkdirAll(filepath.Join(s.dir, "bar", "dir.snap"), 0755), IsNil)141 name1 := filepath.Join(s.dir, "foo", "file1.snap")142 name2 := filepath.Join(s.dir, "bar", "file2.snap")143 name3 := filepath.Join(s.dir, "bar", "dir.snap", "sentinel")144 c.Assert(ioutil.WriteFile(name1, []byte(`text`), 0600), IsNil)145 c.Assert(ioutil.WriteFile(name2, []byte(`text`), 0600), IsNil)146 c.Assert(ioutil.WriteFile(name3, []byte(`text`), 0600), IsNil)147 changed, removed, err := osutil.EnsureTreeState(s.dir, s.globs, map[string]map[string]osutil.FileState{148 "foo": {149 "file1.snap": &osutil.MemoryFileState{Content: []byte(`content-1`), Mode: 0600},150 },151 })152 c.Check(err, ErrorMatches, `remove .*/bar/dir.snap: directory not empty`)153 c.Check(changed, HasLen, 0)154 c.Check(removed, DeepEquals, []string{"bar/file2.snap", "foo/file1.snap"})155 // Matching files have been removed, along with the empty directory156 c.Check(name1, testutil.FileAbsent)157 c.Check(filepath.Dir(name1), testutil.FileAbsent)158 c.Check(name2, testutil.FileAbsent)159 // But the unmatched file in the bad directory remains160 c.Check(name3, testutil.FilePresent)...

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akaros.go

Source:akaros.go Github

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...12)13type akaros struct{}14func (ctx akaros) build(params *Params) error {15 configFile := filepath.Join(params.KernelDir, ".config")16 if err := osutil.WriteFile(configFile, params.Config); err != nil {17 return fmt.Errorf("failed to write config file: %v", err)18 }19 if err := osutil.SandboxChown(configFile); err != nil {20 return err21 }22 sshkey := filepath.Join(params.KernelDir, "key")23 sshkeyPub := sshkey + ".pub"24 os.Remove(sshkey)25 os.Remove(sshkeyPub)26 if _, err := osutil.RunCmd(10*time.Minute, "", "ssh-keygen", "-t", "rsa", "-b", "2048",27 "-N", "", "-C", "", "-f", sshkey); err != nil {28 return err29 }30 if err := osutil.SandboxChown(sshkeyPub); err != nil {31 return err32 }33 if err := ctx.make(params.KernelDir, "", "olddefconfig", "ARCH=x86"); err != nil {34 return err35 }36 if err := ctx.make(params.KernelDir, "", "xcc"); err != nil {37 return err38 }39 if err := ctx.make(params.KernelDir, "tools/dev-libs/elfutils", "install"); err != nil {40 return err41 }42 if err := ctx.make(params.KernelDir, "", "apps-install"); err != nil {43 return err44 }45 if err := ctx.make(params.KernelDir, "", "fill-kfs"); err != nil {46 return err47 }48 targetKey := filepath.Join(params.KernelDir, "kern", "kfs", ".ssh", "authorized_keys")49 if err := osutil.Rename(sshkeyPub, targetKey); err != nil {50 return err51 }52 const init = `#!/bin/bash53/ifconfig54dropbear -F 2>db_out &55bash56`57 initFile := filepath.Join(params.KernelDir, "kern", "kfs", "init.sh")58 if err := osutil.WriteFile(initFile, []byte(init)); err != nil {59 return fmt.Errorf("failed to write init script: %v", err)60 }61 if err := osutil.SandboxChown(initFile); err != nil {62 return err63 }64 if err := os.Chmod(initFile, 0770); err != nil {65 return err66 }67 if err := ctx.cmd(params.KernelDir, "dropbear", "./CONFIGURE_AKAROS"); err != nil {68 return err69 }70 if err := ctx.make(params.KernelDir, "dropbear/build"); err != nil {71 return err72 }73 if err := ctx.make(params.KernelDir, "dropbear/build", "install"); err != nil {74 return err75 }76 if err := ctx.make(params.KernelDir, ""); err != nil {77 return err78 }79 if err := osutil.WriteFile(filepath.Join(params.OutputDir, "image"), nil); err != nil {80 return fmt.Errorf("failed to write image file: %v", err)81 }82 for src, dst := range map[string]string{83 ".config": "kernel.config",84 "key": "key",85 "obj/kern/akaros-kernel": "kernel",86 "obj/kern/akaros-kernel-64b": "obj/akaros-kernel-64b",87 } {88 fullSrc := filepath.Join(params.KernelDir, filepath.FromSlash(src))89 fullDst := filepath.Join(params.OutputDir, filepath.FromSlash(dst))90 if err := osutil.CopyFile(fullSrc, fullDst); err != nil {91 return fmt.Errorf("failed to copy %v: %v", src, err)92 }93 }...

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WriteFile

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1import (2func main() {3 file, err := os.Create("test.txt")4 if err != nil {5 fmt.Println(err)6 }7 defer file.Close()8 _, err = file.WriteString("Hello World")9 if err != nil {10 fmt.Println(err)11 file.Close()12 }13 err = file.Sync()14 if err != nil {15 fmt.Println(err)16 file.Close()17 }18 bs, err := ioutil.ReadFile("test.txt")19 if err != nil {20 fmt.Println(err)21 }22 str := string(bs)23 fmt.Println(str)24}25import (26func main() {27 file, err := os.OpenFile("test.txt", os.O_APPEND|os.O_WRONLY, 0644)28 if err != nil {29 fmt.Println(err)30 }31 defer file.Close()32 _, err = file.WriteString("Hello World")33 if err != nil {34 fmt.Println(err)35 file.Close()36 }37 err = file.Sync()38 if err != nil {39 fmt.Println(err)40 file.Close()41 }42 bs, err := ioutil.ReadFile("test.txt")43 if err != nil {44 fmt.Println(err)45 }46 str := string(bs)47 fmt.Println(str)48}49import (50func main() {51 file, err := os.Open("test.txt")52 if err != nil {53 fmt.Println(err)54 }55 defer file.Close()56 bs, err := ioutil.ReadFile("test.txt")57 if err != nil {58 fmt.Println(err)59 }

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WriteFile

Using AI Code Generation

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1import (2func main() {3 str := []byte("This is a test file")4 err := ioutil.WriteFile("test.txt", str, 0644)5 if err != nil {6 fmt.Println(err)7 }8}9import (10func main() {11 str := []byte("This is a test file")12 err := ioutil.WriteFile("test.txt", str, 0644)13 if err != nil {14 fmt.Println(err)15 }16 err = ioutil.WriteFile("test.txt", []byte("17 if err != nil {18 fmt.Println(err)19 }20}21import (22func main() {23 str := []byte("This is a test file")24 err := ioutil.WriteFile("test.txt", str, 0644)25 if err != nil {26 fmt.Println(err)27 }28 data, err := ioutil.ReadFile("test.txt")29 if err != nil {30 fmt.Println(err)31 }32 fmt.Println(string(data))33}34import (35func main() {36 str := []byte("This is a test file")37 err := ioutil.WriteFile("test.txt", str, 0644)38 if err != nil {39 fmt.Println(err)40 }41 files, err := ioutil.ReadDir(".")42 if err != nil {43 fmt.Println(err)44 }45 for _, file := range files {46 fmt.Println(file.Name

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WriteFile

Using AI Code Generation

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1import (2func main() {3 f, err := os.Create("file1.txt")4 if err != nil {5 fmt.Println(err)6 }7 defer f.Close()8 f.WriteString("This is my first file creation program in golang")9 f, err = os.Open("file1.txt")10 if err != nil {11 fmt.Println(err)12 }13 defer f.Close()14 bs := make([]byte, 100)15 n, err := f.Read(bs)16 if err != nil {17 fmt.Println(err)18 }19 fmt.Println("number of bytes read: ", n)20 str := string(bs)21 fmt.Println(str)22}23func WriteFile(filename string, data []byte, perm os.FileMode) error24import (25func main() {26 err := os.WriteFile("file2.txt", []byte("This is my second file creation program in golang"), 0644)27 if err != nil {28 fmt.Println(err)29 }30 f, err := os.Open("file2.txt")31 if err != nil {32 fmt.Println(err)33 }34 defer f.Close()35 bs := make([]byte, 100)36 n, err := f.Read(bs)37 if err != nil {38 fmt.Println(err)

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WriteFile

Using AI Code Generation

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1import (2func main() {3 f, err := os.Create("test.txt")4 if err != nil {5 fmt.Println(err)6 }7 l, err := f.WriteString("Hello World8 if err != nil {9 fmt.Println(err)10 f.Close()11 }12 fmt.Println(l, "bytes written successfully")13 l, err = f.WriteString("Writing data in file using golang14 if err != nil {15 fmt.Println(err)16 f.Close()17 }18 fmt.Println(l, "bytes written successfully")19 l, err = f.WriteString("WriteString method of File type")20 if err != nil {21 fmt.Println(err)22 f.Close()23 }24 fmt.Println(l, "bytes written successfully")25 err = f.Close()26 if err != nil {27 fmt.Println(err)28 }29 data, err := ioutil.ReadFile("test.txt")30 if err != nil {31 fmt.Println(err)32 }33 fmt.Println("Contents of file:", string(data))34 err = os.Mkdir("subdir", 0755)35 if err != nil {36 fmt.Println(err)37 }38 f, err = os.Create(filepath.Join("subdir", "test.txt"))39 if err != nil {40 fmt.Println(err)41 }42 l, err = f.WriteString("Hello World43 if err != nil {44 fmt.Println(err)45 f.Close()46 }47 fmt.Println(l, "bytes written successfully")48 l, err = f.WriteString("Writing data in file using golang49 if err != nil {50 fmt.Println(err)51 f.Close()52 }53 fmt.Println(l, "bytes written successfully")54 l, err = f.WriteString("WriteString method of File type")55 if err != nil {56 fmt.Println(err)57 f.Close()

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WriteFile

Using AI Code Generation

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1import (2func main() {3 err := ioutil.WriteFile("test.txt", []byte("Hello World"), 0644)4 if err != nil {5 fmt.Println(err)6 }7}8func ReadFile(filename string) ([]byte, error)9import (10func main() {11 data, err := ioutil.ReadFile("test.txt")12 if err != nil {13 fmt.Println(err)14 }15 fmt.Println(string(data))16}17func ReadDir(dirname string) ([]os.FileInfo, error)18import (19func main() {20 dir, err := ioutil.ReadDir("./")21 if err != nil {22 fmt.Println(err)23 }24 for _, d := range dir {25 fmt.Println(d.Name())26 }27}

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WriteFile

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1import (2func main() {3 fmt.Println("Creating a file using writefile method of osutil class")4 data := []byte("Hello World")5 err := ioutil.WriteFile("test.txt", data, 0644)6 if err != nil {7 panic(err)8 }9}

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WriteFile

Using AI Code Generation

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1import (2func main() {3 err := ioutil.WriteFile("test.txt", []byte(data), 0644)4 if err != nil {5 log.Fatal(err)6 }7}8import (9func main() {10 data, err := ioutil.ReadFile("test.txt")11 if err != nil {12 log.Fatal(err)13 }14 text := string(data)15 fmt.Println(text)16}17import (18func main() {19 err := ioutil.WriteFile("test.txt", []byte(data), 0644)20 if err != nil {21 log.Fatal(err)22 }23}24import (25func main() {26 data, err := ioutil.ReadFile("test.txt")27 if err != nil {28 log.Fatal(err)29 }30 text := string(data)31 fmt.Println(text)32}

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