Command substitution is adding a newline?
Clash Royale CLAN TAG#URR8PPP
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I have a script that queries the device architecture from an android device, and uses that in a path to push a file to the device.
The code is similar to this:
ARCH=$(adb shell getprop ro.product.cpu.abi)
adb push libs/"$ARCH"/binary /data/local/tmp/binary
However, the path gets mangled. When piping the getprop command to a file, I can see that it returns a newline, which is probably the cause of the problem. I was under the impression that command substitution strips newlines, but either way, I tried:
ARCH=$(adb shell getprop ro.product.cpu.abi | tr -d 'n')
with still no luck.
Any ideas/
bash shell-script variable newlines
asked Nov 20 '17 at 19:38
afuna
1676
 |Â
show 1 more comment
up vote
0
down vote
favorite
I have a script that queries the device architecture from an android device, and uses that in a path to push a file to the device.
The code is similar to this:
ARCH=$(adb shell getprop ro.product.cpu.abi)
adb push libs/"$ARCH"/binary /data/local/tmp/binary
However, the path gets mangled. When piping the getprop command to a file, I can see that it returns a newline, which is probably the cause of the problem. I was under the impression that command substitution strips newlines, but either way, I tried:
ARCH=$(adb shell getprop ro.product.cpu.abi | tr -d 'n')
with still no luck.
Any ideas/
bash shell-script variable newlines
asked Nov 20 '17 at 19:38
afuna
1676
1
It strips trailing newlines; "interior" newlines are preserved.
– chepner
Nov 20 '17 at 19:56
1
What is the output of theadbcommand, and what is the output ofprintf '%qn' "$ARCH"?
– chepner
Nov 20 '17 at 19:57
@chepner: adb outputsarmeabi-v7a, the printf outputs$'armeabi-v7ar'
– afuna
Nov 20 '17 at 21:03
1
You don't have a newline; you have a carriage return, which the command substitution does not strip.
– chepner
Nov 20 '17 at 21:06
@chepner so usingtr -d 'r'would be the way to go...
– afuna
Nov 20 '17 at 21:08
 |Â
show 1 more comment
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I have a script that queries the device architecture from an android device, and uses that in a path to push a file to the device.
The code is similar to this:
ARCH=$(adb shell getprop ro.product.cpu.abi)
adb push libs/"$ARCH"/binary /data/local/tmp/binary
However, the path gets mangled. When piping the getprop command to a file, I can see that it returns a newline, which is probably the cause of the problem. I was under the impression that command substitution strips newlines, but either way, I tried:
ARCH=$(adb shell getprop ro.product.cpu.abi | tr -d 'n')
with still no luck.
Any ideas/
bash shell-script variable newlines
asked Nov 20 '17 at 19:38
afuna
1676
I have a script that queries the device architecture from an android device, and uses that in a path to push a file to the device.
The code is similar to this:
ARCH=$(adb shell getprop ro.product.cpu.abi)
adb push libs/"$ARCH"/binary /data/local/tmp/binary
However, the path gets mangled. When piping the getprop command to a file, I can see that it returns a newline, which is probably the cause of the problem. I was under the impression that command substitution strips newlines, but either way, I tried:
ARCH=$(adb shell getprop ro.product.cpu.abi | tr -d 'n')
with still no luck.
Any ideas/
bash shell-script variable newlines
asked Nov 20 '17 at 19:38
afuna
1676
asked Nov 20 '17 at 19:38
afuna
1676
asked Nov 20 '17 at 19:38
afuna
1676
asked Nov 20 '17 at 19:38
afuna
1676
1676
1
It strips trailing newlines; "interior" newlines are preserved.
– chepner
Nov 20 '17 at 19:56
1
What is the output of theadbcommand, and what is the output ofprintf '%qn' "$ARCH"?
– chepner
Nov 20 '17 at 19:57
@chepner: adb outputsarmeabi-v7a, the printf outputs$'armeabi-v7ar'
– afuna
Nov 20 '17 at 21:03
1
You don't have a newline; you have a carriage return, which the command substitution does not strip.
– chepner
Nov 20 '17 at 21:06
@chepner so usingtr -d 'r'would be the way to go...
– afuna
Nov 20 '17 at 21:08
 |Â
show 1 more comment
1
It strips trailing newlines; "interior" newlines are preserved.
– chepner
Nov 20 '17 at 19:56
1
What is the output of theadbcommand, and what is the output ofprintf '%qn' "$ARCH"?
– chepner
Nov 20 '17 at 19:57
@chepner: adb outputsarmeabi-v7a, the printf outputs$'armeabi-v7ar'
– afuna
Nov 20 '17 at 21:03
1
You don't have a newline; you have a carriage return, which the command substitution does not strip.
– chepner
Nov 20 '17 at 21:06
@chepner so usingtr -d 'r'would be the way to go...
– afuna
Nov 20 '17 at 21:08
1
1
It strips trailing newlines; "interior" newlines are preserved.
– chepner
Nov 20 '17 at 19:56
It strips trailing newlines; "interior" newlines are preserved.
– chepner
Nov 20 '17 at 19:56
1
1
What is the output of the
adb command, and what is the output of printf '%qn' "$ARCH"?– chepner
Nov 20 '17 at 19:57
What is the output of the
adb command, and what is the output of printf '%qn' "$ARCH"?– chepner
Nov 20 '17 at 19:57
@chepner: adb outputs
armeabi-v7a, the printf outputs $'armeabi-v7ar'– afuna
Nov 20 '17 at 21:03
@chepner: adb outputs
armeabi-v7a, the printf outputs $'armeabi-v7ar'– afuna
Nov 20 '17 at 21:03
1
1
You don't have a newline; you have a carriage return, which the command substitution does not strip.
– chepner
Nov 20 '17 at 21:06
You don't have a newline; you have a carriage return, which the command substitution does not strip.
– chepner
Nov 20 '17 at 21:06
@chepner so using
tr -d 'r' would be the way to go...– afuna
Nov 20 '17 at 21:08
@chepner so using
tr -d 'r' would be the way to go...– afuna
Nov 20 '17 at 21:08
 |Â
show 1 more comment
1 Answer
1
active
oldest
votes
up vote
2
down vote
accepted
adb outputs a command with a DOS line ending. The command substitution strips the newline character, but not the carriage return; you'll have to strip that manually.
ARCH=$(adb shell getprop ro.product.cpu.abi)
ARCH=$ARCH%$'r'
adb push libs/"$ARCH"/binary /data/local/tmp/binary
answered Nov 20 '17 at 21:08
chepner
5,1551223
I'm actually using anadbserver on Windows, but running the script from Ubuntu (on Windows). I wonder ifadbis conforming to Windows standards, but would returnnif it was running on linux.
– afuna
Nov 20 '17 at 21:14
add a comment |Â
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
2
down vote
accepted
adb outputs a command with a DOS line ending. The command substitution strips the newline character, but not the carriage return; you'll have to strip that manually.
ARCH=$(adb shell getprop ro.product.cpu.abi)
ARCH=$ARCH%$'r'
adb push libs/"$ARCH"/binary /data/local/tmp/binary
answered Nov 20 '17 at 21:08
chepner
5,1551223
I'm actually using anadbserver on Windows, but running the script from Ubuntu (on Windows). I wonder ifadbis conforming to Windows standards, but would returnnif it was running on linux.
– afuna
Nov 20 '17 at 21:14
add a comment |Â
up vote
2
down vote
accepted
adb outputs a command with a DOS line ending. The command substitution strips the newline character, but not the carriage return; you'll have to strip that manually.
ARCH=$(adb shell getprop ro.product.cpu.abi)
ARCH=$ARCH%$'r'
adb push libs/"$ARCH"/binary /data/local/tmp/binary
answered Nov 20 '17 at 21:08
chepner
5,1551223
I'm actually using anadbserver on Windows, but running the script from Ubuntu (on Windows). I wonder ifadbis conforming to Windows standards, but would returnnif it was running on linux.
– afuna
Nov 20 '17 at 21:14
add a comment |Â
up vote
2
down vote
accepted
up vote
2
down vote
accepted
adb outputs a command with a DOS line ending. The command substitution strips the newline character, but not the carriage return; you'll have to strip that manually.
ARCH=$(adb shell getprop ro.product.cpu.abi)
ARCH=$ARCH%$'r'
adb push libs/"$ARCH"/binary /data/local/tmp/binary
answered Nov 20 '17 at 21:08
chepner
5,1551223
adb outputs a command with a DOS line ending. The command substitution strips the newline character, but not the carriage return; you'll have to strip that manually.
ARCH=$(adb shell getprop ro.product.cpu.abi)
ARCH=$ARCH%$'r'
adb push libs/"$ARCH"/binary /data/local/tmp/binary
answered Nov 20 '17 at 21:08
chepner
5,1551223
answered Nov 20 '17 at 21:08
chepner
5,1551223
answered Nov 20 '17 at 21:08
chepner
5,1551223
answered Nov 20 '17 at 21:08
chepner
5,1551223
5,1551223
I'm actually using anadbserver on Windows, but running the script from Ubuntu (on Windows). I wonder ifadbis conforming to Windows standards, but would returnnif it was running on linux.
– afuna
Nov 20 '17 at 21:14
add a comment |Â
I'm actually using anadbserver on Windows, but running the script from Ubuntu (on Windows). I wonder ifadbis conforming to Windows standards, but would returnnif it was running on linux.
– afuna
Nov 20 '17 at 21:14
I'm actually using an
adb server on Windows, but running the script from Ubuntu (on Windows). I wonder if adb is conforming to Windows standards, but would return n if it was running on linux.– afuna
Nov 20 '17 at 21:14
I'm actually using an
adb server on Windows, but running the script from Ubuntu (on Windows). I wonder if adb is conforming to Windows standards, but would return n if it was running on linux.– afuna
Nov 20 '17 at 21:14
add a comment |Â
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1
It strips trailing newlines; "interior" newlines are preserved.
– chepner
Nov 20 '17 at 19:56
1
What is the output of the
adbcommand, and what is the output ofprintf '%qn' "$ARCH"?– chepner
Nov 20 '17 at 19:57
@chepner: adb outputs
armeabi-v7a, the printf outputs$'armeabi-v7ar'– afuna
Nov 20 '17 at 21:03
1
You don't have a newline; you have a carriage return, which the command substitution does not strip.
– chepner
Nov 20 '17 at 21:06
@chepner so using
tr -d 'r'would be the way to go...– afuna
Nov 20 '17 at 21:08