create scripts inside a c prog

[Nalle]

Hi first post here..... so dont execute me at once


I trying to find examples of the following

i making a small .c progg that i want to create a outputfile called

move-expect

wich would contain this
#!/usr/bin/expect -f
set username someting
set password something
spawn sftp $username@localhost
expect "assword:"
send "$password\r"
expect "ftp>"
send "put file\r"
expect "ftp>"
send "quit"

and then execute the file move-expect

i know how to do it in a .sh script but cat <<_EOF>> dont seem to work to good inside a.c proggie

hope someone knows how to do it

cheers!

[xxxrugby]

Oi! Is this what you ment. I use system() -> this work on Windows. Don think for Linux, change there system(emacs move-expect);

#include <stdio.h>

int main()
{
    FILE *fp;
    fp = fopen("move-expect","w");
    fprintf(fp, "#!/usr/binexpect -f\n"
           "set username something\n"
           "set password something\n"
           "spawn sftp $username@localhost\n"
           "expect \"assword\"\n"
           "send \"$password\\r\"\n"
           "expect \"ftp>\"\n"
           "send \"put file\\r\"\n"
           "expect \"ftp>\"\n"
           "send \"quit\"\n");
    fclose(fp);
    system("notepad move-expect");
    system("PAUSE");
    return 0;
}

[jim mcnamara]

What are your requirements for this project? If it works in shell leave it there.

When you call system() in unix, you invoke a POSIX shell,( which may or may not have all the envrionment variables you reference in the script), not necessarily the shell you use to execute the script. It probably ain't worth the trouble.

[Nalle]

xxxrugby
thanks man works like a charm

hope i can help you out sometime to!

[bithub]

For your system command, run:

 system("/usr/binexpect move-expect");

Don't forget to include stdlib.h as well.

[Nalle]

Thanks for the help but i have another question...

when you make a c prog like this it seems likewhen you edit the complied prog with lets say "vi" it show the entire script in cler text is there someway to get around that ?

Cheers!

[caroundw5h]

Oi! Is this what you ment. I use system() -> this work on Windows. Don think for Linux, change there system(emacs move-expect);

#include <stdio.h>

int main()
{
    FILE *fp;
    fp = fopen("move-expect","w");
    fprintf(fp, "#!/usr/binexpect -f\n"
           "set username something\n"
           "set password something\n"
           "spawn sftp $username@localhost\n"
           "expect \"assword\"\n"
           "send \"$password\\r\"\n"
           "expect \"ftp>\"\n"
           "send \"put file\\r\"\n"
           "expect \"ftp>\"\n"
           "send \"quit\"\n");
    fclose(fp);
    system("notepad move-expect");
    system("PAUSE");
    return 0;
}

concise and to the point but now that you have it down don't forget this. and its security implications.

[Salem]

> it show the entire script in cler text is there someway to get around that ?
Having figured that writing a C program just to output a script and execute it was a pretty pointless thing to do (why not just write the script and be done with it), it now seems that your real question should have been "how do I stop people viewing the contents of my script".

The answer may have been to use chmod
chmod 700 move-expect
read-write-executable by you, hidden from everyone else

chmod 710 move-expect
read-write-executable by you, executable (but not read/writable) by people in the same group.

Yes, people can run your programs without having the priviledge to look inside them.