Is mkdir -p totally safe when creating folder already exists

up vote
7
down vote

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Say I have a folder:

./folder/

Inside it there are many files and even sub-directories.

When I execute:

mkdir -p folder

I won't see any errors even warnings. so just want to confirm, is there anything lost or changed in result of this command?

asked Nov 14 '15 at 13:14

AGamePlayer

1,881102942

2

The help of mkdir says that the directories are only created when they are not present. This implies to me that when the directory exists there is nothing done.
â€“Â Marco
Nov 14 '15 at 13:29

add a commentÂ |Â

up vote
7
down vote

favorite

Say I have a folder:

./folder/

Inside it there are many files and even sub-directories.

When I execute:

mkdir -p folder

I won't see any errors even warnings. so just want to confirm, is there anything lost or changed in result of this command?

asked Nov 14 '15 at 13:14

AGamePlayer

1,881102942

2

The help of mkdir says that the directories are only created when they are not present. This implies to me that when the directory exists there is nothing done.
â€“Â Marco
Nov 14 '15 at 13:29

add a commentÂ |Â

up vote
7
down vote

favorite

Say I have a folder:

./folder/

Inside it there are many files and even sub-directories.

When I execute:

mkdir -p folder

I won't see any errors even warnings. so just want to confirm, is there anything lost or changed in result of this command?

asked Nov 14 '15 at 13:14

AGamePlayer

1,881102942

Say I have a folder:

./folder/

Inside it there are many files and even sub-directories.

When I execute:

mkdir -p folder

I won't see any errors even warnings. so just want to confirm, is there anything lost or changed in result of this command?

mkdir

asked Nov 14 '15 at 13:14

AGamePlayer

1,881102942

asked Nov 14 '15 at 13:14

AGamePlayer

1,881102942

asked Nov 14 '15 at 13:14

AGamePlayer

1,881102942

asked Nov 14 '15 at 13:14

AGamePlayer

1,881102942

asked Nov 14 '15 at 13:14

AGamePlayer

1,881102942

2

The help of mkdir says that the directories are only created when they are not present. This implies to me that when the directory exists there is nothing done.
â€“Â Marco
Nov 14 '15 at 13:29

add a commentÂ |Â

2

The help of mkdir says that the directories are only created when they are not present. This implies to me that when the directory exists there is nothing done.
â€“Â Marco
Nov 14 '15 at 13:29

The help of mkdir says that the directories are only created when they are not present. This implies to me that when the directory exists there is nothing done.
â€“Â Marco
Nov 14 '15 at 13:29

add a commentÂ |Â

3 Answers
3

active

oldest

votes

up vote
9
down vote

accepted

mkdir -p would not give you an error if the directory already exists and the contents for the directory will not change.

Manual entry for mkdir

edited Aug 26 at 14:05

Communityâ™¦

answered Nov 14 '15 at 13:39

ARG

95978

1

This answer does not seem to be correct. mkdir indeed emits an error if the directory exists, unless using the -p flag.
â€“Â Aaron Cicali
Jul 19 '16 at 2:35

in error, you could check for the code like this if(err.code == 'EEXIST') this condition will get true if the directory already exists.
â€“Â user403173
Aug 2 at 6:53

add a commentÂ |Â

up vote
11
down vote

A portable script will rely upon POSIX, which says of mkdir's -p option:

Each dir operand that names an existing directory shall be ignored without error.

and if there are no errors reported, the -p option has done its job:

Create any missing intermediate pathname components.

edited Nov 14 '15 at 13:52

answered Nov 14 '15 at 13:43

Thomas Dickey

50.2k587157

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up vote
3
down vote

mkdir WILL give you an error if the directory already exists.

mkdir -p WILL NOT give you an error if the directory already exists. Also, the directory will remain untouched i.e. the contents are preserved as they were.

answered Jul 27 '17 at 14:44

Tushar Vazirani

1311

add a commentÂ |Â

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3 Answers
3

active

oldest

votes

3 Answers
3

active

oldest

votes

up vote
9
down vote

accepted

mkdir -p would not give you an error if the directory already exists and the contents for the directory will not change.

Manual entry for mkdir

edited Aug 26 at 14:05

Communityâ™¦

answered Nov 14 '15 at 13:39

ARG

95978

1

This answer does not seem to be correct. mkdir indeed emits an error if the directory exists, unless using the -p flag.
â€“Â Aaron Cicali
Jul 19 '16 at 2:35

in error, you could check for the code like this if(err.code == 'EEXIST') this condition will get true if the directory already exists.
â€“Â user403173
Aug 2 at 6:53

add a commentÂ |Â

up vote
9
down vote

accepted

mkdir -p would not give you an error if the directory already exists and the contents for the directory will not change.

Manual entry for mkdir

edited Aug 26 at 14:05

Communityâ™¦

answered Nov 14 '15 at 13:39

ARG

95978

1

This answer does not seem to be correct. mkdir indeed emits an error if the directory exists, unless using the -p flag.
â€“Â Aaron Cicali
Jul 19 '16 at 2:35

in error, you could check for the code like this if(err.code == 'EEXIST') this condition will get true if the directory already exists.
â€“Â user403173
Aug 2 at 6:53

add a commentÂ |Â

up vote
9
down vote

accepted

mkdir -p would not give you an error if the directory already exists and the contents for the directory will not change.

Manual entry for mkdir

edited Aug 26 at 14:05

Communityâ™¦

answered Nov 14 '15 at 13:39

ARG

95978

mkdir -p would not give you an error if the directory already exists and the contents for the directory will not change.

Manual entry for mkdir

edited Aug 26 at 14:05

Communityâ™¦

answered Nov 14 '15 at 13:39

ARG

95978

edited Aug 26 at 14:05

Communityâ™¦

edited Aug 26 at 14:05

Communityâ™¦

edited Aug 26 at 14:05

Communityâ™¦

answered Nov 14 '15 at 13:39

ARG

95978

answered Nov 14 '15 at 13:39

ARG

95978

answered Nov 14 '15 at 13:39

ARG

95978

1

This answer does not seem to be correct. mkdir indeed emits an error if the directory exists, unless using the -p flag.
â€“Â Aaron Cicali
Jul 19 '16 at 2:35

in error, you could check for the code like this if(err.code == 'EEXIST') this condition will get true if the directory already exists.
â€“Â user403173
Aug 2 at 6:53

add a commentÂ |Â

1

This answer does not seem to be correct. mkdir indeed emits an error if the directory exists, unless using the -p flag.
â€“Â Aaron Cicali
Jul 19 '16 at 2:35

in error, you could check for the code like this if(err.code == 'EEXIST') this condition will get true if the directory already exists.
â€“Â user403173
Aug 2 at 6:53

This answer does not seem to be correct. mkdir indeed emits an error if the directory exists, unless using the -p flag.
â€“Â Aaron Cicali
Jul 19 '16 at 2:35

in error, you could check for the code like this if(err.code == 'EEXIST') this condition will get true if the directory already exists.
â€“Â user403173
Aug 2 at 6:53

add a commentÂ |Â

up vote
11
down vote

A portable script will rely upon POSIX, which says of mkdir's -p option:

Each dir operand that names an existing directory shall be ignored without error.

and if there are no errors reported, the -p option has done its job:

Create any missing intermediate pathname components.

edited Nov 14 '15 at 13:52

answered Nov 14 '15 at 13:43

Thomas Dickey

50.2k587157

add a commentÂ |Â

up vote
11
down vote

A portable script will rely upon POSIX, which says of mkdir's -p option:

Each dir operand that names an existing directory shall be ignored without error.

and if there are no errors reported, the -p option has done its job:

Create any missing intermediate pathname components.

edited Nov 14 '15 at 13:52

answered Nov 14 '15 at 13:43

Thomas Dickey

50.2k587157

add a commentÂ |Â

up vote
11
down vote

A portable script will rely upon POSIX, which says of mkdir's -p option:

Each dir operand that names an existing directory shall be ignored without error.

and if there are no errors reported, the -p option has done its job:

Create any missing intermediate pathname components.

edited Nov 14 '15 at 13:52

answered Nov 14 '15 at 13:43

Thomas Dickey

50.2k587157

A portable script will rely upon POSIX, which says of mkdir's -p option:

Each dir operand that names an existing directory shall be ignored without error.

and if there are no errors reported, the -p option has done its job:

Create any missing intermediate pathname components.

edited Nov 14 '15 at 13:52

answered Nov 14 '15 at 13:43

Thomas Dickey

50.2k587157

edited Nov 14 '15 at 13:52

answered Nov 14 '15 at 13:43

Thomas Dickey

50.2k587157

answered Nov 14 '15 at 13:43

Thomas Dickey

50.2k587157

answered Nov 14 '15 at 13:43

Thomas Dickey

50.2k587157

add a commentÂ |Â

up vote
3
down vote

mkdir WILL give you an error if the directory already exists.

mkdir -p WILL NOT give you an error if the directory already exists. Also, the directory will remain untouched i.e. the contents are preserved as they were.

answered Jul 27 '17 at 14:44

Tushar Vazirani

1311

add a commentÂ |Â

up vote
3
down vote

mkdir WILL give you an error if the directory already exists.

mkdir -p WILL NOT give you an error if the directory already exists. Also, the directory will remain untouched i.e. the contents are preserved as they were.

answered Jul 27 '17 at 14:44

Tushar Vazirani

1311

add a commentÂ |Â

up vote
3
down vote

mkdir WILL give you an error if the directory already exists.

mkdir -p WILL NOT give you an error if the directory already exists. Also, the directory will remain untouched i.e. the contents are preserved as they were.

answered Jul 27 '17 at 14:44

Tushar Vazirani

1311

mkdir WILL give you an error if the directory already exists.

mkdir -p WILL NOT give you an error if the directory already exists. Also, the directory will remain untouched i.e. the contents are preserved as they were.

answered Jul 27 '17 at 14:44

Tushar Vazirani

1311

answered Jul 27 '17 at 14:44

Tushar Vazirani

1311

answered Jul 27 '17 at 14:44

Tushar Vazirani

1311

answered Jul 27 '17 at 14:44

Tushar Vazirani

1311

add a commentÂ |Â

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