awk function with a number parameter for the column you want to print

I want to use my awk shortcut as a function, so that I can pass the column number which then prints me the output. My aliases are:

alias A="| awk '{print $1}'

alias G="| grep -i'

Instad of typing:

ps -ef | grep mysql | awk 'print $2'

I want to be able to type this:

ps -ef G mysql A 2

Any suggestions?

edited Aug 23 '16 at 13:14

John Militer

6592928

asked Jul 27 '12 at 16:52

DannyRe

1114

4

For a completely different approach, try pgrep -f mysql (assuming pgrep is available).

– jw013
Jul 27 '12 at 17:04

nice tool thx!!

– DannyRe
Jul 27 '12 at 17:13

Indeed. And for arbitrary fields, ps -o <field> $(pgrep mysql).

– Mikel
Jul 27 '12 at 17:22

1

or ps h -o %p -C mysqld if you want the PIDs of a particular named process (-C is exact match, not search pattern or regexp). You can have multiple -C args, e.g. ps h -o %p -C mysqld -C mysql to get client and server processes.

– cas
Jul 27 '12 at 21:06

add a comment |

I want to use my awk shortcut as a function, so that I can pass the column number which then prints me the output. My aliases are:

alias A="| awk '{print $1}'

alias G="| grep -i'

Instad of typing:

ps -ef | grep mysql | awk 'print $2'

I want to be able to type this:

ps -ef G mysql A 2

Any suggestions?

edited Aug 23 '16 at 13:14

John Militer

6592928

asked Jul 27 '12 at 16:52

DannyRe

1114

4

For a completely different approach, try pgrep -f mysql (assuming pgrep is available).

– jw013
Jul 27 '12 at 17:04

nice tool thx!!

– DannyRe
Jul 27 '12 at 17:13

Indeed. And for arbitrary fields, ps -o <field> $(pgrep mysql).

– Mikel
Jul 27 '12 at 17:22

1

or ps h -o %p -C mysqld if you want the PIDs of a particular named process (-C is exact match, not search pattern or regexp). You can have multiple -C args, e.g. ps h -o %p -C mysqld -C mysql to get client and server processes.

– cas
Jul 27 '12 at 21:06

add a comment |

I want to use my awk shortcut as a function, so that I can pass the column number which then prints me the output. My aliases are:

alias A="| awk '{print $1}'

alias G="| grep -i'

Instad of typing:

ps -ef | grep mysql | awk 'print $2'

I want to be able to type this:

ps -ef G mysql A 2

Any suggestions?

edited Aug 23 '16 at 13:14

John Militer

6592928

asked Jul 27 '12 at 16:52

DannyRe

1114

I want to use my awk shortcut as a function, so that I can pass the column number which then prints me the output. My aliases are:

alias A="| awk '{print $1}'

alias G="| grep -i'

Instad of typing:

ps -ef | grep mysql | awk 'print $2'

I want to be able to type this:

ps -ef G mysql A 2

Any suggestions?

shell alias function

edited Aug 23 '16 at 13:14

John Militer

6592928

asked Jul 27 '12 at 16:52

DannyRe

1114

edited Aug 23 '16 at 13:14

John Militer

6592928

asked Jul 27 '12 at 16:52

DannyRe

1114

edited Aug 23 '16 at 13:14

John Militer

6592928

edited Aug 23 '16 at 13:14

John Militer

6592928

edited Aug 23 '16 at 13:14

John Militer

6592928

asked Jul 27 '12 at 16:52

DannyRe

1114

asked Jul 27 '12 at 16:52

DannyRe

1114

asked Jul 27 '12 at 16:52

DannyRe

1114

4

For a completely different approach, try pgrep -f mysql (assuming pgrep is available).

– jw013
Jul 27 '12 at 17:04

nice tool thx!!

– DannyRe
Jul 27 '12 at 17:13

Indeed. And for arbitrary fields, ps -o <field> $(pgrep mysql).

– Mikel
Jul 27 '12 at 17:22

1

or ps h -o %p -C mysqld if you want the PIDs of a particular named process (-C is exact match, not search pattern or regexp). You can have multiple -C args, e.g. ps h -o %p -C mysqld -C mysql to get client and server processes.

– cas
Jul 27 '12 at 21:06

add a comment |

4

For a completely different approach, try pgrep -f mysql (assuming pgrep is available).

– jw013
Jul 27 '12 at 17:04

nice tool thx!!

– DannyRe
Jul 27 '12 at 17:13

Indeed. And for arbitrary fields, ps -o <field> $(pgrep mysql).

– Mikel
Jul 27 '12 at 17:22

1

or ps h -o %p -C mysqld if you want the PIDs of a particular named process (-C is exact match, not search pattern or regexp). You can have multiple -C args, e.g. ps h -o %p -C mysqld -C mysql to get client and server processes.

– cas
Jul 27 '12 at 21:06

For a completely different approach, try pgrep -f mysql (assuming pgrep is available).

– jw013
Jul 27 '12 at 17:04

nice tool thx!!

– DannyRe
Jul 27 '12 at 17:13

Indeed. And for arbitrary fields, ps -o <field> $(pgrep mysql).

– Mikel
Jul 27 '12 at 17:22

or ps h -o %p -C mysqld if you want the PIDs of a particular named process (-C is exact match, not search pattern or regexp). You can have multiple -C args, e.g. ps h -o %p -C mysqld -C mysql to get client and server processes.

– cas
Jul 27 '12 at 21:06

add a comment |

2 Answers
2

active

oldest

votes

I don't think it's possible. Basically, aliases can't take arguments ($1), and functions can't do macro expansion (|).

The closest options I can think of:

in bash or zsh

C() { col=$1; shift; eval "awkcmd='{ print $$col }'"; echo "$awkcmd"; "$@" | awk "$awkcmd"; }



C 2 ps -ef G mysql

in zsh

alias -g F="| tr -s '[[:space:]]' | cut -d ' ' -f"



ps -ef G mysql F 2

answered Jul 27 '12 at 17:10

Mikel

40k10103127

add a comment |

Putting pipes into aliases is awkward. Instead, create a shell function that you can pipe things to:

G () {

    grep -i "$@"

}



A () {

    awk -v col="$1" '{ print $col }'

}

Then,

ps -ef | G mysql | A 2

But this particular pipeline would, on a Linux system, be more or less the same as

pgrep mysql

answered Feb 28 at 20:57

Kusalananda

137k17258426

add a comment |

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

I don't think it's possible. Basically, aliases can't take arguments ($1), and functions can't do macro expansion (|).

The closest options I can think of:

in bash or zsh

C() { col=$1; shift; eval "awkcmd='{ print $$col }'"; echo "$awkcmd"; "$@" | awk "$awkcmd"; }



C 2 ps -ef G mysql

in zsh

alias -g F="| tr -s '[[:space:]]' | cut -d ' ' -f"



ps -ef G mysql F 2

answered Jul 27 '12 at 17:10

Mikel

40k10103127

add a comment |

I don't think it's possible. Basically, aliases can't take arguments ($1), and functions can't do macro expansion (|).

The closest options I can think of:

in bash or zsh

C() { col=$1; shift; eval "awkcmd='{ print $$col }'"; echo "$awkcmd"; "$@" | awk "$awkcmd"; }



C 2 ps -ef G mysql

in zsh

alias -g F="| tr -s '[[:space:]]' | cut -d ' ' -f"



ps -ef G mysql F 2

answered Jul 27 '12 at 17:10

Mikel

40k10103127

add a comment |

I don't think it's possible. Basically, aliases can't take arguments ($1), and functions can't do macro expansion (|).

The closest options I can think of:

in bash or zsh

C() { col=$1; shift; eval "awkcmd='{ print $$col }'"; echo "$awkcmd"; "$@" | awk "$awkcmd"; }



C 2 ps -ef G mysql

in zsh

alias -g F="| tr -s '[[:space:]]' | cut -d ' ' -f"



ps -ef G mysql F 2

answered Jul 27 '12 at 17:10

Mikel

40k10103127

I don't think it's possible. Basically, aliases can't take arguments ($1), and functions can't do macro expansion (|).

The closest options I can think of:

in bash or zsh

C() { col=$1; shift; eval "awkcmd='{ print $$col }'"; echo "$awkcmd"; "$@" | awk "$awkcmd"; }



C 2 ps -ef G mysql

in zsh

alias -g F="| tr -s '[[:space:]]' | cut -d ' ' -f"



ps -ef G mysql F 2

answered Jul 27 '12 at 17:10

Mikel

40k10103127

answered Jul 27 '12 at 17:10

Mikel

40k10103127

answered Jul 27 '12 at 17:10

Mikel

40k10103127

answered Jul 27 '12 at 17:10

Mikel

40k10103127

add a comment |

Putting pipes into aliases is awkward. Instead, create a shell function that you can pipe things to:

G () {

    grep -i "$@"

}



A () {

    awk -v col="$1" '{ print $col }'

}

Then,

ps -ef | G mysql | A 2

But this particular pipeline would, on a Linux system, be more or less the same as

pgrep mysql

answered Feb 28 at 20:57

Kusalananda

137k17258426

add a comment |

Putting pipes into aliases is awkward. Instead, create a shell function that you can pipe things to:

G () {

    grep -i "$@"

}



A () {

    awk -v col="$1" '{ print $col }'

}

Then,

ps -ef | G mysql | A 2

But this particular pipeline would, on a Linux system, be more or less the same as

pgrep mysql

answered Feb 28 at 20:57

Kusalananda

137k17258426

add a comment |

Putting pipes into aliases is awkward. Instead, create a shell function that you can pipe things to:

G () {

    grep -i "$@"

}



A () {

    awk -v col="$1" '{ print $col }'

}

Then,

ps -ef | G mysql | A 2

But this particular pipeline would, on a Linux system, be more or less the same as

pgrep mysql

answered Feb 28 at 20:57

Kusalananda

137k17258426

Putting pipes into aliases is awkward. Instead, create a shell function that you can pipe things to:

G () {

    grep -i "$@"

}



A () {

    awk -v col="$1" '{ print $col }'

}

Then,

ps -ef | G mysql | A 2

But this particular pipeline would, on a Linux system, be more or less the same as

pgrep mysql

answered Feb 28 at 20:57

Kusalananda

137k17258426

answered Feb 28 at 20:57

Kusalananda

137k17258426

answered Feb 28 at 20:57

Kusalananda

137k17258426

answered Feb 28 at 20:57

Kusalananda

137k17258426

add a comment |

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