Why are redirections not working following assignment?
Clash Royale CLAN TAG#URR8PPP
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./NulFile contains NUL. When command expansion removes NUL from it, it outputs warnings. Is there some way to suppress the warnings?
Why are redirections not working?
$ filecontent="$(cat ./NulFile)" 1>/dev/null 2>&1
bash: warning: command substitution: ignored null byte in input
bash io-redirection command-substitution
asked Nov 21 at 14:00
Ben
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up vote
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down vote
favorite
./NulFile contains NUL. When command expansion removes NUL from it, it outputs warnings. Is there some way to suppress the warnings?
Why are redirections not working?
$ filecontent="$(cat ./NulFile)" 1>/dev/null 2>&1
bash: warning: command substitution: ignored null byte in input
bash io-redirection command-substitution
asked Nov 21 at 14:00
Ben
2788
New contributor
Ben is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
./NulFile contains NUL. When command expansion removes NUL from it, it outputs warnings. Is there some way to suppress the warnings?
Why are redirections not working?
$ filecontent="$(cat ./NulFile)" 1>/dev/null 2>&1
bash: warning: command substitution: ignored null byte in input
bash io-redirection command-substitution
asked Nov 21 at 14:00
Ben
2788
New contributor
Ben is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
./NulFile contains NUL. When command expansion removes NUL from it, it outputs warnings. Is there some way to suppress the warnings?
Why are redirections not working?
$ filecontent="$(cat ./NulFile)" 1>/dev/null 2>&1
bash: warning: command substitution: ignored null byte in input
bash io-redirection command-substitution
bash io-redirection command-substitution
asked Nov 21 at 14:00
Ben
2788
New contributor
Ben is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked Nov 21 at 14:00
Ben
2788
New contributor
Ben is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked Nov 21 at 14:00
Ben
2788
New contributor
Ben is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked Nov 21 at 14:00
Ben
2788
asked Nov 21 at 14:00
Ben
2788
2788
New contributor
Ben is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Ben is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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1 Answer
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Put it in a command group and redirect the output of the group:
$ foo=$(cat /bin/sleep)
bash: warning: command substitution: ignored null byte in input
$ foo=$(cat /bin/sleep); 2>/dev/null
$
Because ...; isn't a subshell, the variable will still be available.
$ echo $#foo
19786
The warning is from the shell, and you need to redirect the shell's output for it to work. In the group, even the shell's output is redirected (only within that group).
answered Nov 21 at 14:08
Arcticooling
1
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It works. Do you know why my command didn't work?
– Ben
Nov 21 at 14:11
That's the last paragraph of my answer.
– Arcticooling
Nov 21 at 14:15
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
2
down vote
Put it in a command group and redirect the output of the group:
$ foo=$(cat /bin/sleep)
bash: warning: command substitution: ignored null byte in input
$ foo=$(cat /bin/sleep); 2>/dev/null
$
Because ...; isn't a subshell, the variable will still be available.
$ echo $#foo
19786
The warning is from the shell, and you need to redirect the shell's output for it to work. In the group, even the shell's output is redirected (only within that group).
answered Nov 21 at 14:08
Arcticooling
1
New contributor
Arcticooling is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
It works. Do you know why my command didn't work?
– Ben
Nov 21 at 14:11
That's the last paragraph of my answer.
– Arcticooling
Nov 21 at 14:15
add a comment |
up vote
2
down vote
Put it in a command group and redirect the output of the group:
$ foo=$(cat /bin/sleep)
bash: warning: command substitution: ignored null byte in input
$ foo=$(cat /bin/sleep); 2>/dev/null
$
Because ...; isn't a subshell, the variable will still be available.
$ echo $#foo
19786
The warning is from the shell, and you need to redirect the shell's output for it to work. In the group, even the shell's output is redirected (only within that group).
answered Nov 21 at 14:08
Arcticooling
1
New contributor
Arcticooling is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
It works. Do you know why my command didn't work?
– Ben
Nov 21 at 14:11
That's the last paragraph of my answer.
– Arcticooling
Nov 21 at 14:15
add a comment |
up vote
2
down vote
up vote
2
down vote
Put it in a command group and redirect the output of the group:
$ foo=$(cat /bin/sleep)
bash: warning: command substitution: ignored null byte in input
$ foo=$(cat /bin/sleep); 2>/dev/null
$
Because ...; isn't a subshell, the variable will still be available.
$ echo $#foo
19786
The warning is from the shell, and you need to redirect the shell's output for it to work. In the group, even the shell's output is redirected (only within that group).
answered Nov 21 at 14:08
Arcticooling
1
New contributor
Arcticooling is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Put it in a command group and redirect the output of the group:
$ foo=$(cat /bin/sleep)
bash: warning: command substitution: ignored null byte in input
$ foo=$(cat /bin/sleep); 2>/dev/null
$
Because ...; isn't a subshell, the variable will still be available.
$ echo $#foo
19786
The warning is from the shell, and you need to redirect the shell's output for it to work. In the group, even the shell's output is redirected (only within that group).
answered Nov 21 at 14:08
Arcticooling
1
New contributor
Arcticooling is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered Nov 21 at 14:08
Arcticooling
1
New contributor
Arcticooling is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered Nov 21 at 14:08
Arcticooling
1
answered Nov 21 at 14:08
Arcticooling
1
1
New contributor
Arcticooling is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Arcticooling is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Arcticooling is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
It works. Do you know why my command didn't work?
– Ben
Nov 21 at 14:11
That's the last paragraph of my answer.
– Arcticooling
Nov 21 at 14:15
add a comment |
It works. Do you know why my command didn't work?
– Ben
Nov 21 at 14:11
That's the last paragraph of my answer.
– Arcticooling
Nov 21 at 14:15
It works. Do you know why my command didn't work?
– Ben
Nov 21 at 14:11
It works. Do you know why my command didn't work?
– Ben
Nov 21 at 14:11
That's the last paragraph of my answer.
– Arcticooling
Nov 21 at 14:15
That's the last paragraph of my answer.
– Arcticooling
Nov 21 at 14:15
add a comment |
Ben is a new contributor. Be nice, and check out our Code of Conduct.
Ben is a new contributor. Be nice, and check out our Code of Conduct.
Ben is a new contributor. Be nice, and check out our Code of Conduct.
Ben is a new contributor. Be nice, and check out our Code of Conduct.
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