Run bash script between time variables

-1

I need to run some task at a dynamic time presented in the variable (which value is in HH.mm.ss format) + 2 minutes from its value and less than 5 minutes. Then I could add this job to crontab to schedule it for every minute and I hope that the script will run when the time variable syncs the current time + 2 (or a bit more) minutes (but no more than 5 minutes).

Thank you.

Update:
Thanks to l0b0, all that is left is to find a way to substract 2 minutes from HH.mm.ss variable to get for example 05:28:00 after substraction from var 05:30:00. I think it must be somehow simple. Thanks for help.

edited Nov 13 '18 at 18:17

asked Nov 12 '18 at 18:57

Dmitry

2

You can schedule it to run every minute and perform that check (if it's within 2 and 5 minutes from some other time). Every other run will just fail that If statement and not run.
– JNevill
Nov 12 '18 at 19:02

Thanks for your comment, but how could I write it for I am very newbie in bash? Thank you.
– Dmitry
Nov 12 '18 at 19:14

Please read over these guidelines on how to ask a good question well.
– Paul Hodges
Nov 12 '18 at 22:09

add a comment |

-1

Thank you.

edited Nov 13 '18 at 18:17

asked Nov 12 '18 at 18:57

Dmitry

2

You can schedule it to run every minute and perform that check (if it's within 2 and 5 minutes from some other time). Every other run will just fail that If statement and not run.
– JNevill
Nov 12 '18 at 19:02

Thanks for your comment, but how could I write it for I am very newbie in bash? Thank you.
– Dmitry
Nov 12 '18 at 19:14

Please read over these guidelines on how to ask a good question well.
– Paul Hodges
Nov 12 '18 at 22:09

add a comment |

-1

Thank you.

edited Nov 13 '18 at 18:17

asked Nov 12 '18 at 18:57

Dmitry

Thank you.

bash variables time cron schedule

edited Nov 13 '18 at 18:17

asked Nov 12 '18 at 18:57

Dmitry

edited Nov 13 '18 at 18:17

asked Nov 12 '18 at 18:57

Dmitry

edited Nov 13 '18 at 18:17

asked Nov 12 '18 at 18:57

Dmitry

asked Nov 12 '18 at 18:57

Dmitry

asked Nov 12 '18 at 18:57

Dmitry

2

You can schedule it to run every minute and perform that check (if it's within 2 and 5 minutes from some other time). Every other run will just fail that If statement and not run.
– JNevill
Nov 12 '18 at 19:02

Thanks for your comment, but how could I write it for I am very newbie in bash? Thank you.
– Dmitry
Nov 12 '18 at 19:14

Please read over these guidelines on how to ask a good question well.
– Paul Hodges
Nov 12 '18 at 22:09

add a comment |

2

You can schedule it to run every minute and perform that check (if it's within 2 and 5 minutes from some other time). Every other run will just fail that If statement and not run.
– JNevill
Nov 12 '18 at 19:02

Thanks for your comment, but how could I write it for I am very newbie in bash? Thank you.
– Dmitry
Nov 12 '18 at 19:14

Please read over these guidelines on how to ask a good question well.
– Paul Hodges
Nov 12 '18 at 22:09

You can schedule it to run every minute and perform that check (if it's within 2 and 5 minutes from some other time). Every other run will just fail that If statement and not run.
– JNevill
Nov 12 '18 at 19:02

Thanks for your comment, but how could I write it for I am very newbie in bash? Thank you.
– Dmitry
Nov 12 '18 at 19:14

Please read over these guidelines on how to ask a good question well.
– Paul Hodges
Nov 12 '18 at 22:09

add a comment |

1 Answer
1

active

oldest

votes

at should do the trick. Based on man at and an offset variable $offset you should be able to use this (untested):

echo 'some_command with arguments' | at "now + $offset"

edited Nov 13 '18 at 5:46

answered Nov 12 '18 at 20:51

l0b0

33.4k1584145

Thank you for your answer, but I tried to use 'at' right away and faced that it executes the script immediately and not at a scheduled time as its mentioned ('a new job has been added'), so I couldn't understand why it didn't work for me and thought then it could be done with another methods.
– Dmitry
Nov 13 '18 at 5:05

That message just means at has scheduled the command to run at the given time.
– l0b0
Nov 13 '18 at 5:18

I see but using 'at' the script runs at the time I execute it despite of the added scheduled job (it doesn't start at the pointed time though), maybe something wrong with my 'at' command on my computer, I can try it on another one to see if the problem is in command and not in the script. Thanks
– Dmitry
Nov 13 '18 at 5:24

tried to open /Applications/Mail.app | at 08:27 and as I said it opened the app immediately, the same on both computers, what I do wrong? I need to run another working script at a time, not just a command. Thank you.
– Dmitry
Nov 13 '18 at 5:35

No, at is not broken. What you're doing there is running the command and passing the output of it to at, which is not at all what you want. Try using the pattern I've shown you.
– l0b0
Nov 13 '18 at 5:36

|
show 8 more comments

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1 Answer
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1 Answer
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at should do the trick. Based on man at and an offset variable $offset you should be able to use this (untested):

echo 'some_command with arguments' | at "now + $offset"

edited Nov 13 '18 at 5:46

answered Nov 12 '18 at 20:51

l0b0

33.4k1584145

Thank you for your answer, but I tried to use 'at' right away and faced that it executes the script immediately and not at a scheduled time as its mentioned ('a new job has been added'), so I couldn't understand why it didn't work for me and thought then it could be done with another methods.
– Dmitry
Nov 13 '18 at 5:05

That message just means at has scheduled the command to run at the given time.
– l0b0
Nov 13 '18 at 5:18

I see but using 'at' the script runs at the time I execute it despite of the added scheduled job (it doesn't start at the pointed time though), maybe something wrong with my 'at' command on my computer, I can try it on another one to see if the problem is in command and not in the script. Thanks
– Dmitry
Nov 13 '18 at 5:24

tried to open /Applications/Mail.app | at 08:27 and as I said it opened the app immediately, the same on both computers, what I do wrong? I need to run another working script at a time, not just a command. Thank you.
– Dmitry
Nov 13 '18 at 5:35

No, at is not broken. What you're doing there is running the command and passing the output of it to at, which is not at all what you want. Try using the pattern I've shown you.
– l0b0
Nov 13 '18 at 5:36

|
show 8 more comments

at should do the trick. Based on man at and an offset variable $offset you should be able to use this (untested):

echo 'some_command with arguments' | at "now + $offset"

edited Nov 13 '18 at 5:46

answered Nov 12 '18 at 20:51

l0b0

33.4k1584145

Thank you for your answer, but I tried to use 'at' right away and faced that it executes the script immediately and not at a scheduled time as its mentioned ('a new job has been added'), so I couldn't understand why it didn't work for me and thought then it could be done with another methods.
– Dmitry
Nov 13 '18 at 5:05

That message just means at has scheduled the command to run at the given time.
– l0b0
Nov 13 '18 at 5:18

I see but using 'at' the script runs at the time I execute it despite of the added scheduled job (it doesn't start at the pointed time though), maybe something wrong with my 'at' command on my computer, I can try it on another one to see if the problem is in command and not in the script. Thanks
– Dmitry
Nov 13 '18 at 5:24

tried to open /Applications/Mail.app | at 08:27 and as I said it opened the app immediately, the same on both computers, what I do wrong? I need to run another working script at a time, not just a command. Thank you.
– Dmitry
Nov 13 '18 at 5:35

No, at is not broken. What you're doing there is running the command and passing the output of it to at, which is not at all what you want. Try using the pattern I've shown you.
– l0b0
Nov 13 '18 at 5:36

|
show 8 more comments

at should do the trick. Based on man at and an offset variable $offset you should be able to use this (untested):

echo 'some_command with arguments' | at "now + $offset"

edited Nov 13 '18 at 5:46

answered Nov 12 '18 at 20:51

l0b0

33.4k1584145

at should do the trick. Based on man at and an offset variable $offset you should be able to use this (untested):

echo 'some_command with arguments' | at "now + $offset"

edited Nov 13 '18 at 5:46

answered Nov 12 '18 at 20:51

l0b0

33.4k1584145

edited Nov 13 '18 at 5:46

answered Nov 12 '18 at 20:51

l0b0

33.4k1584145

answered Nov 12 '18 at 20:51

l0b0

33.4k1584145

answered Nov 12 '18 at 20:51

l0b0

33.4k1584145

Thank you for your answer, but I tried to use 'at' right away and faced that it executes the script immediately and not at a scheduled time as its mentioned ('a new job has been added'), so I couldn't understand why it didn't work for me and thought then it could be done with another methods.
– Dmitry
Nov 13 '18 at 5:05

That message just means at has scheduled the command to run at the given time.
– l0b0
Nov 13 '18 at 5:18

I see but using 'at' the script runs at the time I execute it despite of the added scheduled job (it doesn't start at the pointed time though), maybe something wrong with my 'at' command on my computer, I can try it on another one to see if the problem is in command and not in the script. Thanks
– Dmitry
Nov 13 '18 at 5:24

tried to open /Applications/Mail.app | at 08:27 and as I said it opened the app immediately, the same on both computers, what I do wrong? I need to run another working script at a time, not just a command. Thank you.
– Dmitry
Nov 13 '18 at 5:35

No, at is not broken. What you're doing there is running the command and passing the output of it to at, which is not at all what you want. Try using the pattern I've shown you.
– l0b0
Nov 13 '18 at 5:36

|
show 8 more comments

Thank you for your answer, but I tried to use 'at' right away and faced that it executes the script immediately and not at a scheduled time as its mentioned ('a new job has been added'), so I couldn't understand why it didn't work for me and thought then it could be done with another methods.
– Dmitry
Nov 13 '18 at 5:05

That message just means at has scheduled the command to run at the given time.
– l0b0
Nov 13 '18 at 5:18

I see but using 'at' the script runs at the time I execute it despite of the added scheduled job (it doesn't start at the pointed time though), maybe something wrong with my 'at' command on my computer, I can try it on another one to see if the problem is in command and not in the script. Thanks
– Dmitry
Nov 13 '18 at 5:24

tried to open /Applications/Mail.app | at 08:27 and as I said it opened the app immediately, the same on both computers, what I do wrong? I need to run another working script at a time, not just a command. Thank you.
– Dmitry
Nov 13 '18 at 5:35

No, at is not broken. What you're doing there is running the command and passing the output of it to at, which is not at all what you want. Try using the pattern I've shown you.
– l0b0
Nov 13 '18 at 5:36

Thank you for your answer, but I tried to use 'at' right away and faced that it executes the script immediately and not at a scheduled time as its mentioned ('a new job has been added'), so I couldn't understand why it didn't work for me and thought then it could be done with another methods.
– Dmitry
Nov 13 '18 at 5:05

That message just means at has scheduled the command to run at the given time.
– l0b0
Nov 13 '18 at 5:18

I see but using 'at' the script runs at the time I execute it despite of the added scheduled job (it doesn't start at the pointed time though), maybe something wrong with my 'at' command on my computer, I can try it on another one to see if the problem is in command and not in the script. Thanks
– Dmitry
Nov 13 '18 at 5:24

tried to open /Applications/Mail.app | at 08:27 and as I said it opened the app immediately, the same on both computers, what I do wrong? I need to run another working script at a time, not just a command. Thank you.
– Dmitry
Nov 13 '18 at 5:35

No, at is not broken. What you're doing there is running the command and passing the output of it to at, which is not at all what you want. Try using the pattern I've shown you.
– l0b0
Nov 13 '18 at 5:36

|
show 8 more comments

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