control-flowed variable in Bash
The web-application document-root for Debian-Apache is typically /var/www/html/ but for Arch-Apache it's typically /srv/http/.
I wrote a distro-agnostic LAMP-establishment script and I need it to test what is the distro-oriented document-root dir (based on the dir's existence) and the one that is true is the one I would continue to work with till the end of the script.
I usually do drt="/var/www/html" but I need to have the variable control flowed like in this pseudocode:
drt="/var/www/html XOR /srv/http"
Of course, only one of the two or more options is true, and that should base the XOR conditioning.
Is there a way to do so in Bash?
bash scripting variable stability
asked Jan 19 at 21:25
JohnDoeaJohnDoea
551133
add a comment |
The web-application document-root for Debian-Apache is typically /var/www/html/ but for Arch-Apache it's typically /srv/http/.
I wrote a distro-agnostic LAMP-establishment script and I need it to test what is the distro-oriented document-root dir (based on the dir's existence) and the one that is true is the one I would continue to work with till the end of the script.
I usually do drt="/var/www/html" but I need to have the variable control flowed like in this pseudocode:
drt="/var/www/html XOR /srv/http"
Of course, only one of the two or more options is true, and that should base the XOR conditioning.
Is there a way to do so in Bash?
bash scripting variable stability
asked Jan 19 at 21:25
JohnDoeaJohnDoea
551133
The dir's existence.
– JohnDoea
Jan 19 at 21:35
add a comment |
The web-application document-root for Debian-Apache is typically /var/www/html/ but for Arch-Apache it's typically /srv/http/.
I wrote a distro-agnostic LAMP-establishment script and I need it to test what is the distro-oriented document-root dir (based on the dir's existence) and the one that is true is the one I would continue to work with till the end of the script.
I usually do drt="/var/www/html" but I need to have the variable control flowed like in this pseudocode:
drt="/var/www/html XOR /srv/http"
Of course, only one of the two or more options is true, and that should base the XOR conditioning.
Is there a way to do so in Bash?
bash scripting variable stability
asked Jan 19 at 21:25
JohnDoeaJohnDoea
551133
The web-application document-root for Debian-Apache is typically /var/www/html/ but for Arch-Apache it's typically /srv/http/.
I wrote a distro-agnostic LAMP-establishment script and I need it to test what is the distro-oriented document-root dir (based on the dir's existence) and the one that is true is the one I would continue to work with till the end of the script.
I usually do drt="/var/www/html" but I need to have the variable control flowed like in this pseudocode:
drt="/var/www/html XOR /srv/http"
Of course, only one of the two or more options is true, and that should base the XOR conditioning.
Is there a way to do so in Bash?
bash scripting variable stability
bash scripting variable stability
asked Jan 19 at 21:25
JohnDoeaJohnDoea
551133
asked Jan 19 at 21:25
JohnDoeaJohnDoea
551133
edited Jan 19 at 21:50
JohnDoea
asked Jan 19 at 21:25
JohnDoeaJohnDoea
551133
asked Jan 19 at 21:25
JohnDoeaJohnDoea
551133
asked Jan 19 at 21:25
JohnDoeaJohnDoea
551133
551133
The dir's existence.
– JohnDoea
Jan 19 at 21:35
add a comment |
The dir's existence.
– JohnDoea
Jan 19 at 21:35
The dir's existence.
– JohnDoea
Jan 19 at 21:35
The dir's existence.
– JohnDoea
Jan 19 at 21:35
add a comment |
1 Answer
1
active
oldest
votes
I need it to test what is the distro-oriented document-root dir (based on the dir's existence)
From those two options, you could use [ -d dir ] to see if they exist:
if [ -d /var/www/html ]; then
drt=/var/www/html;
elif [ -d /srv/http ]; then
drt=/srv/http
else
echo "No HTTP server root directory found"
exit 1
fi
or, with a loop:
drt=
for d in /var/www/html /srv/http; do
if [ -d "$d" ]; then
drt=$d;
break
fi
done
if [ -z "$drt" ]; then
echo "No HTTP server root directory found"
exit 1
fi
Of course, all of this assumes that they're actually using the distro's default document root, which might not be the case. It might not be a bad idea to give the user a chance to verify that the directory found by the script is the correct one.
answered Jan 19 at 21:59
ilkkachuilkkachu
57.2k786159
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
I need it to test what is the distro-oriented document-root dir (based on the dir's existence)
From those two options, you could use [ -d dir ] to see if they exist:
if [ -d /var/www/html ]; then
drt=/var/www/html;
elif [ -d /srv/http ]; then
drt=/srv/http
else
echo "No HTTP server root directory found"
exit 1
fi
or, with a loop:
drt=
for d in /var/www/html /srv/http; do
if [ -d "$d" ]; then
drt=$d;
break
fi
done
if [ -z "$drt" ]; then
echo "No HTTP server root directory found"
exit 1
fi
Of course, all of this assumes that they're actually using the distro's default document root, which might not be the case. It might not be a bad idea to give the user a chance to verify that the directory found by the script is the correct one.
answered Jan 19 at 21:59
ilkkachuilkkachu
57.2k786159
add a comment |
I need it to test what is the distro-oriented document-root dir (based on the dir's existence)
From those two options, you could use [ -d dir ] to see if they exist:
if [ -d /var/www/html ]; then
drt=/var/www/html;
elif [ -d /srv/http ]; then
drt=/srv/http
else
echo "No HTTP server root directory found"
exit 1
fi
or, with a loop:
drt=
for d in /var/www/html /srv/http; do
if [ -d "$d" ]; then
drt=$d;
break
fi
done
if [ -z "$drt" ]; then
echo "No HTTP server root directory found"
exit 1
fi
Of course, all of this assumes that they're actually using the distro's default document root, which might not be the case. It might not be a bad idea to give the user a chance to verify that the directory found by the script is the correct one.
answered Jan 19 at 21:59
ilkkachuilkkachu
57.2k786159
add a comment |
I need it to test what is the distro-oriented document-root dir (based on the dir's existence)
From those two options, you could use [ -d dir ] to see if they exist:
if [ -d /var/www/html ]; then
drt=/var/www/html;
elif [ -d /srv/http ]; then
drt=/srv/http
else
echo "No HTTP server root directory found"
exit 1
fi
or, with a loop:
drt=
for d in /var/www/html /srv/http; do
if [ -d "$d" ]; then
drt=$d;
break
fi
done
if [ -z "$drt" ]; then
echo "No HTTP server root directory found"
exit 1
fi
Of course, all of this assumes that they're actually using the distro's default document root, which might not be the case. It might not be a bad idea to give the user a chance to verify that the directory found by the script is the correct one.
answered Jan 19 at 21:59
ilkkachuilkkachu
57.2k786159
I need it to test what is the distro-oriented document-root dir (based on the dir's existence)
From those two options, you could use [ -d dir ] to see if they exist:
if [ -d /var/www/html ]; then
drt=/var/www/html;
elif [ -d /srv/http ]; then
drt=/srv/http
else
echo "No HTTP server root directory found"
exit 1
fi
or, with a loop:
drt=
for d in /var/www/html /srv/http; do
if [ -d "$d" ]; then
drt=$d;
break
fi
done
if [ -z "$drt" ]; then
echo "No HTTP server root directory found"
exit 1
fi
Of course, all of this assumes that they're actually using the distro's default document root, which might not be the case. It might not be a bad idea to give the user a chance to verify that the directory found by the script is the correct one.
answered Jan 19 at 21:59
ilkkachuilkkachu
57.2k786159
answered Jan 19 at 21:59
ilkkachuilkkachu
57.2k786159
answered Jan 19 at 21:59
ilkkachuilkkachu
57.2k786159
answered Jan 19 at 21:59
ilkkachuilkkachu
57.2k786159
57.2k786159
add a comment |
add a comment |
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The dir's existence.
– JohnDoea
Jan 19 at 21:35