Why some non-root program can be executed by double-click while others not?
For example, I found Firefox's process command line: /usr/lib/firefox/firefox. I browse to this location and double-click it, it prompts this:
enter image description here
However, if I type the command in terminal, it works normally.
executable
asked 1 hour ago
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For example, I found Firefox's process command line: /usr/lib/firefox/firefox. I browse to this location and double-click it, it prompts this:
enter image description here
However, if I type the command in terminal, it works normally.
executable
asked 1 hour ago
sz ppetersz ppeter
1
New contributor
sz ppeter 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 |
For example, I found Firefox's process command line: /usr/lib/firefox/firefox. I browse to this location and double-click it, it prompts this:
enter image description here
However, if I type the command in terminal, it works normally.
executable
asked 1 hour ago
sz ppetersz ppeter
1
New contributor
sz ppeter is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
For example, I found Firefox's process command line: /usr/lib/firefox/firefox. I browse to this location and double-click it, it prompts this:
enter image description here
However, if I type the command in terminal, it works normally.
executable
executable
asked 1 hour ago
sz ppetersz ppeter
1
New contributor
sz ppeter is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
sz ppetersz ppeter
1
New contributor
sz ppeter is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
sz ppetersz ppeter
1
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sz ppeter is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
sz ppetersz ppeter
1
asked 1 hour ago
sz ppetersz ppeter
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Simple reason is that file manager recognizes the file type. If you double-click /usr/share/applications/firefox.desktop or any other .desktop file for that matter, the file manager will execute it as application. Otherwise, file manager looks up which filetype corresponds to which application.
And that's were /usr/lib/firefox/firefox comes in. It is compiled as shared object.
$ file /usr/lib/firefox/firefox
/usr/lib/firefox/firefox: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, BuildID[sha1]=d2a4bfe9dbe1aadd5480a6b5612b7a3fc1fd01a2, stripped
This type of file has been touched on in detail in kos's answer, but basically shared object is an executable file, which can be used as library. Libraries usually are included into other software, hence Nautilus can ignore and has no default program assigned to it. By contrast, to shell (or rather kernel, to which execve() call will pass the path to that file) recognizes that as executable file just fine.
Now, what gets executed when you execute firefox.desktop ? That's /usr/bin/firefox.sh - a wrapper script which does a few checks and replaces itself with /usr/lib/firefox/firefox later on. In this case, shell script is detected as filetype and Nautilus happily spawns that. There's a lot of other things that happen behind the scenes, but that's the general gist of it all.
answered 1 hour ago
Sergiy KolodyazhnyySergiy Kolodyazhnyy
72.9k9152316
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1 Answer
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Simple reason is that file manager recognizes the file type. If you double-click /usr/share/applications/firefox.desktop or any other .desktop file for that matter, the file manager will execute it as application. Otherwise, file manager looks up which filetype corresponds to which application.
And that's were /usr/lib/firefox/firefox comes in. It is compiled as shared object.
$ file /usr/lib/firefox/firefox
/usr/lib/firefox/firefox: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, BuildID[sha1]=d2a4bfe9dbe1aadd5480a6b5612b7a3fc1fd01a2, stripped
This type of file has been touched on in detail in kos's answer, but basically shared object is an executable file, which can be used as library. Libraries usually are included into other software, hence Nautilus can ignore and has no default program assigned to it. By contrast, to shell (or rather kernel, to which execve() call will pass the path to that file) recognizes that as executable file just fine.
Now, what gets executed when you execute firefox.desktop ? That's /usr/bin/firefox.sh - a wrapper script which does a few checks and replaces itself with /usr/lib/firefox/firefox later on. In this case, shell script is detected as filetype and Nautilus happily spawns that. There's a lot of other things that happen behind the scenes, but that's the general gist of it all.
answered 1 hour ago
Sergiy KolodyazhnyySergiy Kolodyazhnyy
72.9k9152316
add a comment |
Simple reason is that file manager recognizes the file type. If you double-click /usr/share/applications/firefox.desktop or any other .desktop file for that matter, the file manager will execute it as application. Otherwise, file manager looks up which filetype corresponds to which application.
And that's were /usr/lib/firefox/firefox comes in. It is compiled as shared object.
$ file /usr/lib/firefox/firefox
/usr/lib/firefox/firefox: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, BuildID[sha1]=d2a4bfe9dbe1aadd5480a6b5612b7a3fc1fd01a2, stripped
This type of file has been touched on in detail in kos's answer, but basically shared object is an executable file, which can be used as library. Libraries usually are included into other software, hence Nautilus can ignore and has no default program assigned to it. By contrast, to shell (or rather kernel, to which execve() call will pass the path to that file) recognizes that as executable file just fine.
Now, what gets executed when you execute firefox.desktop ? That's /usr/bin/firefox.sh - a wrapper script which does a few checks and replaces itself with /usr/lib/firefox/firefox later on. In this case, shell script is detected as filetype and Nautilus happily spawns that. There's a lot of other things that happen behind the scenes, but that's the general gist of it all.
answered 1 hour ago
Sergiy KolodyazhnyySergiy Kolodyazhnyy
72.9k9152316
add a comment |
Simple reason is that file manager recognizes the file type. If you double-click /usr/share/applications/firefox.desktop or any other .desktop file for that matter, the file manager will execute it as application. Otherwise, file manager looks up which filetype corresponds to which application.
And that's were /usr/lib/firefox/firefox comes in. It is compiled as shared object.
$ file /usr/lib/firefox/firefox
/usr/lib/firefox/firefox: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, BuildID[sha1]=d2a4bfe9dbe1aadd5480a6b5612b7a3fc1fd01a2, stripped
This type of file has been touched on in detail in kos's answer, but basically shared object is an executable file, which can be used as library. Libraries usually are included into other software, hence Nautilus can ignore and has no default program assigned to it. By contrast, to shell (or rather kernel, to which execve() call will pass the path to that file) recognizes that as executable file just fine.
Now, what gets executed when you execute firefox.desktop ? That's /usr/bin/firefox.sh - a wrapper script which does a few checks and replaces itself with /usr/lib/firefox/firefox later on. In this case, shell script is detected as filetype and Nautilus happily spawns that. There's a lot of other things that happen behind the scenes, but that's the general gist of it all.
answered 1 hour ago
Sergiy KolodyazhnyySergiy Kolodyazhnyy
72.9k9152316
Simple reason is that file manager recognizes the file type. If you double-click /usr/share/applications/firefox.desktop or any other .desktop file for that matter, the file manager will execute it as application. Otherwise, file manager looks up which filetype corresponds to which application.
And that's were /usr/lib/firefox/firefox comes in. It is compiled as shared object.
$ file /usr/lib/firefox/firefox
/usr/lib/firefox/firefox: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, BuildID[sha1]=d2a4bfe9dbe1aadd5480a6b5612b7a3fc1fd01a2, stripped
This type of file has been touched on in detail in kos's answer, but basically shared object is an executable file, which can be used as library. Libraries usually are included into other software, hence Nautilus can ignore and has no default program assigned to it. By contrast, to shell (or rather kernel, to which execve() call will pass the path to that file) recognizes that as executable file just fine.
Now, what gets executed when you execute firefox.desktop ? That's /usr/bin/firefox.sh - a wrapper script which does a few checks and replaces itself with /usr/lib/firefox/firefox later on. In this case, shell script is detected as filetype and Nautilus happily spawns that. There's a lot of other things that happen behind the scenes, but that's the general gist of it all.
answered 1 hour ago
Sergiy KolodyazhnyySergiy Kolodyazhnyy
72.9k9152316
answered 1 hour ago
Sergiy KolodyazhnyySergiy Kolodyazhnyy
72.9k9152316
answered 1 hour ago
Sergiy KolodyazhnyySergiy Kolodyazhnyy
72.9k9152316
answered 1 hour ago
Sergiy KolodyazhnyySergiy Kolodyazhnyy
72.9k9152316
72.9k9152316
add a comment |
add a comment |
sz ppeter is a new contributor. Be nice, and check out our Code of Conduct.
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sz ppeter is a new contributor. Be nice, and check out our Code of Conduct.
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