[SLE] programming question

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Re: [SLE] Permissions on the /tmp...

jasonunrein＠kscable.com

3 Apr 2000 3 Apr '00

01:17

ok i'm desperate and kan't find an answer. Does anyone know how 2 get the directory of the programming currently running. ie, fubar (the app) is stored in /usr/bin i do: cd / fubar output should be "/usr/bin" how would i do this. I've tried everything i can think of and everything in my books and i still can't get it to work. btw it's in c -- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the FAQ at http://www.suse.com/Support/Doku/FAQ/

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gaf＠gaf.ne.mediaone.net

3 Apr 3 Apr

02:39

First, I think you might have a misunderstanding of the Linux (and Unix) file system as well as C. First, argv[0] contains the name of the file as it was typed. If /usr/bin is in your path, and your program is /usr/bin/fubar argv[0] will contain fubar if you typed fubar. Also, remember that in Linux, files do not reside in directories. The directory entry is just a pointer to the inode. An old Unix technique is to create hard links to a single file. For instance, /bin/vi, /bin/view, /bin/ex would all be hard links to the same file. So if you types the view command, you would access the file in view (read only) mode. jason wrote:

...

ok i'm desperate and kan't find an answer.

Does anyone know how 2 get the directory of the programming currently running . ie, fubar (the app) is stored in /usr/bin i do: cd / fubar

output should be "/usr/bin"

how would i do this. I've tried everything i can think of and everything in my books and i still can't get it to work. btw it's in c

-- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com

Also check the FAQ at http://www.suse.com/Support/Doku/FAQ/

-- Jerry Feldman Boston Linux and Unix user group http://www.blu.org -- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the FAQ at http://www.suse.com/Support/Doku/FAQ/

muskrat＠texas.net

04:10

If I understand what you want, there is a function called getcwd, (GET Current Working Directory) that does what you want. (see program at end) It is not ANSI standard C. It works with SuSE 6.1, YMMV. I've installed additional libraries and upgraded a few. I suspect it is available on most systems. HTH, Jeffrey Quoting jason :

...

ok i'm desperate and kan't find an answer.

Does anyone know how 2 get the directory of the programming currently running. ie, fubar (the app) is stored in /usr/bin i do: cd / fubar

output should be "/usr/bin"

how would i do this. I've tried everything i can think of and everything in my books and i still can't get it to work. btw it's in c

============================= cut here ============================= #include int main(int argc, char *argv[]) { printf("%s\n", getcwd()); } -- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the FAQ at http://www.suse.com/Support/Doku/FAQ/

jasonunrein＠kscable.com

03:23

getcwd() isn't what i'm needing. I'll just describe what the program is. The program will be used to students to handin homework assigments over the network. the program handin will be in ~user/bin, the conf files will be in ~user/handin/conf and the students assignments will be stored in ~user/handin/assign#/user_id. They will issue the command by typing "~coursenumber/bin/handin <files>" o if you can see, the cwd will be the students dir and i need to change to the class dir. That is my problems since i kan't get from the students directory to the class directory. chdir( "~class") doesn't work and searching the passwd file for the classes home directory won't work since the computers use a NIS server. On Sun, 02 Apr 2000, you wrote:

...

If I understand what you want, there is a function called getcwd, (GET Current Working Directory) that does what you want. (see program at end) It is not ANSI standard C. It works with SuSE 6.1, YMMV. I've installed additional libraries and upgraded a few. I suspect it is available on most systems.

HTH, Jeffrey

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muskrat＠texas.net

08:38

chdir("~class") does not work because ~class is a bash convention. Try chdir("/home/class") or whatever is appropriate directory. (Note: I haven't tried this, it is very late and I need some sleep.) If the home directory varies depending on the machine, ask your sysadmin why. As an alternative, try extracting it from the finger output or getting the finger source and see how it does it. I don't use NIS, so this may not work on your system. HTH, Jeffrey Quoting jason :

...

getcwd() isn't what i'm needing. I'll just describe what the program is.

The program will be used to students to handin homework assigments over the network. the program handin will be in ~user/bin, the conf files will be in ~user/handin/conf and the students assignments will be stored in ~user/handin/assign#/user_id. They will issue the command by typing "~coursenumber/bin/handin <files>"

so if you can see, the cwd will be the students dir and i need to change to the class dir. That is my problems since i kan't get from the students directory to the class directory. chdir( "~class") doesn't work and searching the passwd file for the classes home directory won't work since the computers use a NIS server.

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Gerry.Feldman＠compaq.com

13:35

After exchaning email with Jason, what he wants to do is to change directory to the current user's home directory. That can be done very easily with: uid = getuid(); pwd = getpwuid(uid); if (pwd) { chdir(pwd->pw_dir); } The password structure contains the user's home directory in pw_dir. On 2 Apr 2000, at 23:10, Jeffrey Taylor wrote:

...

If I understand what you want, there is a function called getcwd, (GET Current Working Directory) that does what you want. (see program at end) It is not ANSI standard C. It works with SuSE 6.1, YMMV. I've installed additional libraries and upgraded a few. I suspect it is available on most systems.

HTH, Jeffrey

Quoting jason :

...
ok i'm desperate and kan't find an answer.

Does anyone know how 2 get the directory of the programming currently running. ie, fubar (the app) is stored in /usr/bin i do: cd / fubar

output should be "/usr/bin"

how would i do this. I've tried everything i can think of and everything in my books and i still can't get it to work. btw it's in c

============================= cut here ============================= #include

int main(int argc, char *argv[]) { printf("%s\n", getcwd()); }

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-- Jerry Feldman Contractor, eInfrastructure Partner Engineering 508-467-4315 http://www.testdrive.compaq.com/linux/ Compaq Computer Corp. 200 Forest Street MRO1-3/F1 Marlboro, Ma. 01752 -- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the FAQ at http://www.suse.com/Support/Doku/FAQ/

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gaf＠gaf.ne.mediaone.net
Gerry.Feldman＠compaq.com
jasonunrein＠kscable.com
muskrat＠texas.net