Zsh: =() substitution with executable permission
Clash Royale CLAN TAG#URR8PPP
I need to give an executable file to this command:
aria2c “some-url” —on-download-complete =(echo “!#/usr/bin/env bash
touch success”)
Is this possible? If not, can I implement some helper functions to make something similar possible?
linux shell-script scripting filesystems zsh
asked Dec 16 at 19:37
HappyFace
31811
add a comment |
I need to give an executable file to this command:
aria2c “some-url” —on-download-complete =(echo “!#/usr/bin/env bash
touch success”)
Is this possible? If not, can I implement some helper functions to make something similar possible?
linux shell-script scripting filesystems zsh
asked Dec 16 at 19:37
HappyFace
31811
add a comment |
I need to give an executable file to this command:
aria2c “some-url” —on-download-complete =(echo “!#/usr/bin/env bash
touch success”)
Is this possible? If not, can I implement some helper functions to make something similar possible?
linux shell-script scripting filesystems zsh
asked Dec 16 at 19:37
HappyFace
31811
I need to give an executable file to this command:
aria2c “some-url” —on-download-complete =(echo “!#/usr/bin/env bash
touch success”)
Is this possible? If not, can I implement some helper functions to make something similar possible?
linux shell-script scripting filesystems zsh
linux shell-script scripting filesystems zsh
asked Dec 16 at 19:37
HappyFace
31811
asked Dec 16 at 19:37
HappyFace
31811
asked Dec 16 at 19:37
HappyFace
31811
asked Dec 16 at 19:37
HappyFace
31811
asked Dec 16 at 19:37
HappyFace
31811
31811
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
The temporary file is not executable,
% stat -f '%Sp' =(echo echo echo)
-rw-------
so will need to be marked as such somehow
#!/usr/bin/env zsh
TMPPREFIX=/because/tmp/is/mounted/noexec/on/my/system/tmp/zsh
fakearia () $1
()
chmod +x $1
fakearia $1
=(<<EOF
#!/bin/sh
echo echo
EOF
)
here via an anonymous function which also helps better scope the temporary file and allows for any number of commands to happen on the filename.
answered Dec 16 at 23:02
thrig
24.2k22956
I tested this with <(), too, but sadly that didn’t work.
– HappyFace
Dec 16 at 23:20
@HappyFace With<(), you get a/dev/fd/nspecial file while fd n is open on the reading end of a pipe (/dev/fd/nbeing a special/proc/self/fd/nsymlink to some sort of virtual named pipe on Linux, and an actual device file on other OSes, so even if you could change the permission of those files that would still not make it real executables).
– Stéphane Chazelas
Dec 23 at 1:03
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
The temporary file is not executable,
% stat -f '%Sp' =(echo echo echo)
-rw-------
so will need to be marked as such somehow
#!/usr/bin/env zsh
TMPPREFIX=/because/tmp/is/mounted/noexec/on/my/system/tmp/zsh
fakearia () $1
()
chmod +x $1
fakearia $1
=(<<EOF
#!/bin/sh
echo echo
EOF
)
here via an anonymous function which also helps better scope the temporary file and allows for any number of commands to happen on the filename.
answered Dec 16 at 23:02
thrig
24.2k22956
I tested this with <(), too, but sadly that didn’t work.
– HappyFace
Dec 16 at 23:20
@HappyFace With<(), you get a/dev/fd/nspecial file while fd n is open on the reading end of a pipe (/dev/fd/nbeing a special/proc/self/fd/nsymlink to some sort of virtual named pipe on Linux, and an actual device file on other OSes, so even if you could change the permission of those files that would still not make it real executables).
– Stéphane Chazelas
Dec 23 at 1:03
add a comment |
The temporary file is not executable,
% stat -f '%Sp' =(echo echo echo)
-rw-------
so will need to be marked as such somehow
#!/usr/bin/env zsh
TMPPREFIX=/because/tmp/is/mounted/noexec/on/my/system/tmp/zsh
fakearia () $1
()
chmod +x $1
fakearia $1
=(<<EOF
#!/bin/sh
echo echo
EOF
)
here via an anonymous function which also helps better scope the temporary file and allows for any number of commands to happen on the filename.
answered Dec 16 at 23:02
thrig
24.2k22956
I tested this with <(), too, but sadly that didn’t work.
– HappyFace
Dec 16 at 23:20
@HappyFace With<(), you get a/dev/fd/nspecial file while fd n is open on the reading end of a pipe (/dev/fd/nbeing a special/proc/self/fd/nsymlink to some sort of virtual named pipe on Linux, and an actual device file on other OSes, so even if you could change the permission of those files that would still not make it real executables).
– Stéphane Chazelas
Dec 23 at 1:03
add a comment |
The temporary file is not executable,
% stat -f '%Sp' =(echo echo echo)
-rw-------
so will need to be marked as such somehow
#!/usr/bin/env zsh
TMPPREFIX=/because/tmp/is/mounted/noexec/on/my/system/tmp/zsh
fakearia () $1
()
chmod +x $1
fakearia $1
=(<<EOF
#!/bin/sh
echo echo
EOF
)
here via an anonymous function which also helps better scope the temporary file and allows for any number of commands to happen on the filename.
answered Dec 16 at 23:02
thrig
24.2k22956
The temporary file is not executable,
% stat -f '%Sp' =(echo echo echo)
-rw-------
so will need to be marked as such somehow
#!/usr/bin/env zsh
TMPPREFIX=/because/tmp/is/mounted/noexec/on/my/system/tmp/zsh
fakearia () $1
()
chmod +x $1
fakearia $1
=(<<EOF
#!/bin/sh
echo echo
EOF
)
here via an anonymous function which also helps better scope the temporary file and allows for any number of commands to happen on the filename.
answered Dec 16 at 23:02
thrig
24.2k22956
answered Dec 16 at 23:02
thrig
24.2k22956
answered Dec 16 at 23:02
thrig
24.2k22956
answered Dec 16 at 23:02
thrig
24.2k22956
24.2k22956
I tested this with <(), too, but sadly that didn’t work.
– HappyFace
Dec 16 at 23:20
@HappyFace With<(), you get a/dev/fd/nspecial file while fd n is open on the reading end of a pipe (/dev/fd/nbeing a special/proc/self/fd/nsymlink to some sort of virtual named pipe on Linux, and an actual device file on other OSes, so even if you could change the permission of those files that would still not make it real executables).
– Stéphane Chazelas
Dec 23 at 1:03
add a comment |
I tested this with <(), too, but sadly that didn’t work.
– HappyFace
Dec 16 at 23:20
@HappyFace With<(), you get a/dev/fd/nspecial file while fd n is open on the reading end of a pipe (/dev/fd/nbeing a special/proc/self/fd/nsymlink to some sort of virtual named pipe on Linux, and an actual device file on other OSes, so even if you could change the permission of those files that would still not make it real executables).
– Stéphane Chazelas
Dec 23 at 1:03
I tested this with <(), too, but sadly that didn’t work.
– HappyFace
Dec 16 at 23:20
I tested this with <(), too, but sadly that didn’t work.
– HappyFace
Dec 16 at 23:20
@HappyFace With
<(), you get a /dev/fd/n special file while fd n is open on the reading end of a pipe (/dev/fd/n being a special /proc/self/fd/n symlink to some sort of virtual named pipe on Linux, and an actual device file on other OSes, so even if you could change the permission of those files that would still not make it real executables).– Stéphane Chazelas
Dec 23 at 1:03
@HappyFace With
<(), you get a /dev/fd/n special file while fd n is open on the reading end of a pipe (/dev/fd/n being a special /proc/self/fd/n symlink to some sort of virtual named pipe on Linux, and an actual device file on other OSes, so even if you could change the permission of those files that would still not make it real executables).– Stéphane Chazelas
Dec 23 at 1:03
add a comment |
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