Get change date of a folder in Go
I want to get the date when a folder was renamed, from terminal it can be done using the stat command, e.g.:
> stat -x folders/folder1
File: "folders/folder1"
Size: 64 FileType: Directory
Mode: (0755/drwxr-xr-x) Uid: (2006390509/username) Gid:
(296108113/EMEADomain Users)
Device: 1,4 Inode: 2599274 Links: 2
Access: Mon Nov 12 17:59:57 2018
Modify: Mon Nov 12 14:12:20 2018
Change: Mon Nov 12 17:28:01 2018
The change date is the last date the folder's metadata was changed, which includes renaming.
Is there any way to get it with Go without using os.exec and parsing the output? os.Stat seems to provide only the last modification date which doesn't change when the folder is renamed.
go asked Nov 12 '18 at 17:07
lawful_evil
394415
add a comment |
I want to get the date when a folder was renamed, from terminal it can be done using the stat command, e.g.:
> stat -x folders/folder1
File: "folders/folder1"
Size: 64 FileType: Directory
Mode: (0755/drwxr-xr-x) Uid: (2006390509/username) Gid:
(296108113/EMEADomain Users)
Device: 1,4 Inode: 2599274 Links: 2
Access: Mon Nov 12 17:59:57 2018
Modify: Mon Nov 12 14:12:20 2018
Change: Mon Nov 12 17:28:01 2018
The change date is the last date the folder's metadata was changed, which includes renaming.
Is there any way to get it with Go without using os.exec and parsing the output? os.Stat seems to provide only the last modification date which doesn't change when the folder is renamed.
go asked Nov 12 '18 at 17:07
lawful_evil
394415
"Is there any way to get it with Go without using os.exec and parsing the output?" I don't see any reason why not; you know the command to get the output and you know what format it's in. Are you having some trouble doing that? Can you show the code you're having trouble with?
– Adrian
Nov 12 '18 at 17:11
@Adrian it works, but I wonder if there is a better and cleaner way to get this information.
– lawful_evil
Nov 12 '18 at 17:13
add a comment |
I want to get the date when a folder was renamed, from terminal it can be done using the stat command, e.g.:
> stat -x folders/folder1
File: "folders/folder1"
Size: 64 FileType: Directory
Mode: (0755/drwxr-xr-x) Uid: (2006390509/username) Gid:
(296108113/EMEADomain Users)
Device: 1,4 Inode: 2599274 Links: 2
Access: Mon Nov 12 17:59:57 2018
Modify: Mon Nov 12 14:12:20 2018
Change: Mon Nov 12 17:28:01 2018
The change date is the last date the folder's metadata was changed, which includes renaming.
Is there any way to get it with Go without using os.exec and parsing the output? os.Stat seems to provide only the last modification date which doesn't change when the folder is renamed.
go asked Nov 12 '18 at 17:07
lawful_evil
394415
I want to get the date when a folder was renamed, from terminal it can be done using the stat command, e.g.:
> stat -x folders/folder1
File: "folders/folder1"
Size: 64 FileType: Directory
Mode: (0755/drwxr-xr-x) Uid: (2006390509/username) Gid:
(296108113/EMEADomain Users)
Device: 1,4 Inode: 2599274 Links: 2
Access: Mon Nov 12 17:59:57 2018
Modify: Mon Nov 12 14:12:20 2018
Change: Mon Nov 12 17:28:01 2018
The change date is the last date the folder's metadata was changed, which includes renaming.
Is there any way to get it with Go without using os.exec and parsing the output? os.Stat seems to provide only the last modification date which doesn't change when the folder is renamed.
go go asked Nov 12 '18 at 17:07
lawful_evil
394415
asked Nov 12 '18 at 17:07
lawful_evil
394415
asked Nov 12 '18 at 17:07
lawful_evil
394415
asked Nov 12 '18 at 17:07
lawful_evil
394415
asked Nov 12 '18 at 17:07
lawful_evil
394415
394415
"Is there any way to get it with Go without using os.exec and parsing the output?" I don't see any reason why not; you know the command to get the output and you know what format it's in. Are you having some trouble doing that? Can you show the code you're having trouble with?
– Adrian
Nov 12 '18 at 17:11
@Adrian it works, but I wonder if there is a better and cleaner way to get this information.
– lawful_evil
Nov 12 '18 at 17:13
add a comment |
"Is there any way to get it with Go without using os.exec and parsing the output?" I don't see any reason why not; you know the command to get the output and you know what format it's in. Are you having some trouble doing that? Can you show the code you're having trouble with?
– Adrian
Nov 12 '18 at 17:11
@Adrian it works, but I wonder if there is a better and cleaner way to get this information.
– lawful_evil
Nov 12 '18 at 17:13
"Is there any way to get it with Go without using os.exec and parsing the output?" I don't see any reason why not; you know the command to get the output and you know what format it's in. Are you having some trouble doing that? Can you show the code you're having trouble with?
– Adrian
Nov 12 '18 at 17:11
"Is there any way to get it with Go without using os.exec and parsing the output?" I don't see any reason why not; you know the command to get the output and you know what format it's in. Are you having some trouble doing that? Can you show the code you're having trouble with?
– Adrian
Nov 12 '18 at 17:11
@Adrian it works, but I wonder if there is a better and cleaner way to get this information.
– lawful_evil
Nov 12 '18 at 17:13
@Adrian it works, but I wonder if there is a better and cleaner way to get this information.
– lawful_evil
Nov 12 '18 at 17:13
add a comment |
2 Answers
2
active
oldest
votes
Change time is not accessible in os.FileInfo but can be get via os.FileInfo.Sys() which stores that data.
You can get it by
package main
import (
"fmt"
"log"
"os"
"syscall"
"time"
)
func main() {
f, err := os.Stat("your/dir")
if err != nil {
log.Fatalf("err reading: %v", err)
}
//access change time saved in os.FileInfo.Sys()
changeTime := f.Sys().(*syscall.Stat_t).Ctim
fmt.Print(time.Unix(changeTime.Unix()).String())
}
Ofcourse you need to check if f.Sys() it's proper type, but yeah syscall.Stat_t.Ctim is probably what you wanted.
answered Nov 12 '18 at 17:40
ttomalak
676110
I think, in macOS one has to replaceCtimwithCtimespec
– lawful_evil
Nov 13 '18 at 11:00
If that's true then inf.Sys()it need to be other typ becausesyscall.Stat_tdon't haveCtimspec. If Ctim is not accessible you need to call reflection onf.Sys()to get it type.
– ttomalak
Nov 13 '18 at 13:21
In macsyscall.Stat_tdoesn't haveCtim, but hasCtimspec, it seems to be the same.
– lawful_evil
Nov 13 '18 at 14:43
Indeed golang.org/src/syscall/ztypes_darwin_amd64.go line76syscall.Stat_tfordarwinos haveCtimespec. It's wired why they do that beetwen os'es
– ttomalak
Nov 13 '18 at 15:52
add a comment |
If you're happy with calling os.Exec maybe you don't mind cross-platform issues. There was some discussion about this on a github issue a while back.
This code works for me to get the changed time anyway. Not sure how/if it'll work on Windows:
file, err := os.Open("test")
if err != nil {
panic(err)
}
stat, err := file.Stat()
sys := stat.Sys().(*syscall.Stat_t)
changedTime := time.Unix(sys.Ctim.Unix())
fmt.Println(stat.ModTime())
fmt.Println(changedTime)
When I run
mv test test1 && mv test1 test && go run main.go
It gives me:
2018-11-12 17:31:38.659095951 +0000 GMT
2018-11-12 17:57:43.042208583 +0000 GMT
Which seems to correctly reflect the time I changed the dirname, and not the creation time (as in the first date)
answered Nov 12 '18 at 18:01
mickadoo
2,0241429
add a comment |
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2 Answers
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active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Change time is not accessible in os.FileInfo but can be get via os.FileInfo.Sys() which stores that data.
You can get it by
package main
import (
"fmt"
"log"
"os"
"syscall"
"time"
)
func main() {
f, err := os.Stat("your/dir")
if err != nil {
log.Fatalf("err reading: %v", err)
}
//access change time saved in os.FileInfo.Sys()
changeTime := f.Sys().(*syscall.Stat_t).Ctim
fmt.Print(time.Unix(changeTime.Unix()).String())
}
Ofcourse you need to check if f.Sys() it's proper type, but yeah syscall.Stat_t.Ctim is probably what you wanted.
answered Nov 12 '18 at 17:40
ttomalak
676110
I think, in macOS one has to replaceCtimwithCtimespec
– lawful_evil
Nov 13 '18 at 11:00
If that's true then inf.Sys()it need to be other typ becausesyscall.Stat_tdon't haveCtimspec. If Ctim is not accessible you need to call reflection onf.Sys()to get it type.
– ttomalak
Nov 13 '18 at 13:21
In macsyscall.Stat_tdoesn't haveCtim, but hasCtimspec, it seems to be the same.
– lawful_evil
Nov 13 '18 at 14:43
Indeed golang.org/src/syscall/ztypes_darwin_amd64.go line76syscall.Stat_tfordarwinos haveCtimespec. It's wired why they do that beetwen os'es
– ttomalak
Nov 13 '18 at 15:52
add a comment |
Change time is not accessible in os.FileInfo but can be get via os.FileInfo.Sys() which stores that data.
You can get it by
package main
import (
"fmt"
"log"
"os"
"syscall"
"time"
)
func main() {
f, err := os.Stat("your/dir")
if err != nil {
log.Fatalf("err reading: %v", err)
}
//access change time saved in os.FileInfo.Sys()
changeTime := f.Sys().(*syscall.Stat_t).Ctim
fmt.Print(time.Unix(changeTime.Unix()).String())
}
Ofcourse you need to check if f.Sys() it's proper type, but yeah syscall.Stat_t.Ctim is probably what you wanted.
answered Nov 12 '18 at 17:40
ttomalak
676110
I think, in macOS one has to replaceCtimwithCtimespec
– lawful_evil
Nov 13 '18 at 11:00
If that's true then inf.Sys()it need to be other typ becausesyscall.Stat_tdon't haveCtimspec. If Ctim is not accessible you need to call reflection onf.Sys()to get it type.
– ttomalak
Nov 13 '18 at 13:21
In macsyscall.Stat_tdoesn't haveCtim, but hasCtimspec, it seems to be the same.
– lawful_evil
Nov 13 '18 at 14:43
Indeed golang.org/src/syscall/ztypes_darwin_amd64.go line76syscall.Stat_tfordarwinos haveCtimespec. It's wired why they do that beetwen os'es
– ttomalak
Nov 13 '18 at 15:52
add a comment |
Change time is not accessible in os.FileInfo but can be get via os.FileInfo.Sys() which stores that data.
You can get it by
package main
import (
"fmt"
"log"
"os"
"syscall"
"time"
)
func main() {
f, err := os.Stat("your/dir")
if err != nil {
log.Fatalf("err reading: %v", err)
}
//access change time saved in os.FileInfo.Sys()
changeTime := f.Sys().(*syscall.Stat_t).Ctim
fmt.Print(time.Unix(changeTime.Unix()).String())
}
Ofcourse you need to check if f.Sys() it's proper type, but yeah syscall.Stat_t.Ctim is probably what you wanted.
answered Nov 12 '18 at 17:40
ttomalak
676110
Change time is not accessible in os.FileInfo but can be get via os.FileInfo.Sys() which stores that data.
You can get it by
package main
import (
"fmt"
"log"
"os"
"syscall"
"time"
)
func main() {
f, err := os.Stat("your/dir")
if err != nil {
log.Fatalf("err reading: %v", err)
}
//access change time saved in os.FileInfo.Sys()
changeTime := f.Sys().(*syscall.Stat_t).Ctim
fmt.Print(time.Unix(changeTime.Unix()).String())
}
Ofcourse you need to check if f.Sys() it's proper type, but yeah syscall.Stat_t.Ctim is probably what you wanted.
answered Nov 12 '18 at 17:40
ttomalak
676110
answered Nov 12 '18 at 17:40
ttomalak
676110
answered Nov 12 '18 at 17:40
ttomalak
676110
answered Nov 12 '18 at 17:40
ttomalak
676110
676110
I think, in macOS one has to replaceCtimwithCtimespec
– lawful_evil
Nov 13 '18 at 11:00
If that's true then inf.Sys()it need to be other typ becausesyscall.Stat_tdon't haveCtimspec. If Ctim is not accessible you need to call reflection onf.Sys()to get it type.
– ttomalak
Nov 13 '18 at 13:21
In macsyscall.Stat_tdoesn't haveCtim, but hasCtimspec, it seems to be the same.
– lawful_evil
Nov 13 '18 at 14:43
Indeed golang.org/src/syscall/ztypes_darwin_amd64.go line76syscall.Stat_tfordarwinos haveCtimespec. It's wired why they do that beetwen os'es
– ttomalak
Nov 13 '18 at 15:52
add a comment |
I think, in macOS one has to replaceCtimwithCtimespec
– lawful_evil
Nov 13 '18 at 11:00
If that's true then inf.Sys()it need to be other typ becausesyscall.Stat_tdon't haveCtimspec. If Ctim is not accessible you need to call reflection onf.Sys()to get it type.
– ttomalak
Nov 13 '18 at 13:21
In macsyscall.Stat_tdoesn't haveCtim, but hasCtimspec, it seems to be the same.
– lawful_evil
Nov 13 '18 at 14:43
Indeed golang.org/src/syscall/ztypes_darwin_amd64.go line76syscall.Stat_tfordarwinos haveCtimespec. It's wired why they do that beetwen os'es
– ttomalak
Nov 13 '18 at 15:52
I think, in macOS one has to replace
Ctim with Ctimespec– lawful_evil
Nov 13 '18 at 11:00
I think, in macOS one has to replace
Ctim with Ctimespec– lawful_evil
Nov 13 '18 at 11:00
If that's true then in
f.Sys() it need to be other typ because syscall.Stat_t don't have Ctimspec. If Ctim is not accessible you need to call reflection on f.Sys() to get it type.– ttomalak
Nov 13 '18 at 13:21
If that's true then in
f.Sys() it need to be other typ because syscall.Stat_t don't have Ctimspec. If Ctim is not accessible you need to call reflection on f.Sys() to get it type.– ttomalak
Nov 13 '18 at 13:21
In mac
syscall.Stat_t doesn't have Ctim, but has Ctimspec, it seems to be the same.– lawful_evil
Nov 13 '18 at 14:43
In mac
syscall.Stat_t doesn't have Ctim, but has Ctimspec, it seems to be the same.– lawful_evil
Nov 13 '18 at 14:43
Indeed golang.org/src/syscall/ztypes_darwin_amd64.go line
76 syscall.Stat_t for darwin os have Ctimespec. It's wired why they do that beetwen os'es– ttomalak
Nov 13 '18 at 15:52
Indeed golang.org/src/syscall/ztypes_darwin_amd64.go line
76 syscall.Stat_t for darwin os have Ctimespec. It's wired why they do that beetwen os'es– ttomalak
Nov 13 '18 at 15:52
add a comment |
If you're happy with calling os.Exec maybe you don't mind cross-platform issues. There was some discussion about this on a github issue a while back.
This code works for me to get the changed time anyway. Not sure how/if it'll work on Windows:
file, err := os.Open("test")
if err != nil {
panic(err)
}
stat, err := file.Stat()
sys := stat.Sys().(*syscall.Stat_t)
changedTime := time.Unix(sys.Ctim.Unix())
fmt.Println(stat.ModTime())
fmt.Println(changedTime)
When I run
mv test test1 && mv test1 test && go run main.go
It gives me:
2018-11-12 17:31:38.659095951 +0000 GMT
2018-11-12 17:57:43.042208583 +0000 GMT
Which seems to correctly reflect the time I changed the dirname, and not the creation time (as in the first date)
answered Nov 12 '18 at 18:01
mickadoo
2,0241429
add a comment |
If you're happy with calling os.Exec maybe you don't mind cross-platform issues. There was some discussion about this on a github issue a while back.
This code works for me to get the changed time anyway. Not sure how/if it'll work on Windows:
file, err := os.Open("test")
if err != nil {
panic(err)
}
stat, err := file.Stat()
sys := stat.Sys().(*syscall.Stat_t)
changedTime := time.Unix(sys.Ctim.Unix())
fmt.Println(stat.ModTime())
fmt.Println(changedTime)
When I run
mv test test1 && mv test1 test && go run main.go
It gives me:
2018-11-12 17:31:38.659095951 +0000 GMT
2018-11-12 17:57:43.042208583 +0000 GMT
Which seems to correctly reflect the time I changed the dirname, and not the creation time (as in the first date)
answered Nov 12 '18 at 18:01
mickadoo
2,0241429
add a comment |
If you're happy with calling os.Exec maybe you don't mind cross-platform issues. There was some discussion about this on a github issue a while back.
This code works for me to get the changed time anyway. Not sure how/if it'll work on Windows:
file, err := os.Open("test")
if err != nil {
panic(err)
}
stat, err := file.Stat()
sys := stat.Sys().(*syscall.Stat_t)
changedTime := time.Unix(sys.Ctim.Unix())
fmt.Println(stat.ModTime())
fmt.Println(changedTime)
When I run
mv test test1 && mv test1 test && go run main.go
It gives me:
2018-11-12 17:31:38.659095951 +0000 GMT
2018-11-12 17:57:43.042208583 +0000 GMT
Which seems to correctly reflect the time I changed the dirname, and not the creation time (as in the first date)
answered Nov 12 '18 at 18:01
mickadoo
2,0241429
If you're happy with calling os.Exec maybe you don't mind cross-platform issues. There was some discussion about this on a github issue a while back.
This code works for me to get the changed time anyway. Not sure how/if it'll work on Windows:
file, err := os.Open("test")
if err != nil {
panic(err)
}
stat, err := file.Stat()
sys := stat.Sys().(*syscall.Stat_t)
changedTime := time.Unix(sys.Ctim.Unix())
fmt.Println(stat.ModTime())
fmt.Println(changedTime)
When I run
mv test test1 && mv test1 test && go run main.go
It gives me:
2018-11-12 17:31:38.659095951 +0000 GMT
2018-11-12 17:57:43.042208583 +0000 GMT
Which seems to correctly reflect the time I changed the dirname, and not the creation time (as in the first date)
answered Nov 12 '18 at 18:01
mickadoo
2,0241429
answered Nov 12 '18 at 18:01
mickadoo
2,0241429
answered Nov 12 '18 at 18:01
mickadoo
2,0241429
answered Nov 12 '18 at 18:01
mickadoo
2,0241429
2,0241429
add a comment |
add a comment |
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"Is there any way to get it with Go without using os.exec and parsing the output?" I don't see any reason why not; you know the command to get the output and you know what format it's in. Are you having some trouble doing that? Can you show the code you're having trouble with?
– Adrian
Nov 12 '18 at 17:11
@Adrian it works, but I wonder if there is a better and cleaner way to get this information.
– lawful_evil
Nov 12 '18 at 17:13