On 03/25/2016 02:03 PM, William Hermans wrote:
No chmod needed *IF* you precede the command with a dot slash "./". So
when you run a regular Linux command do you have to type this dot
slash ? No because chmod +x is run on the executable at some point . . .
So be nice to fellow group users who actually know what they're
talking about, and have been on this list a lot longer than you.
Maybe we need to learn what ./ does... It has absolutely nothing to do
with a files permissions or whether it's executable or not. It's use is
regarding the lack of the current directory "." in one's PATH variable.
Umask is (largely) what controls what permissions a file is created with.
mike@pride-n-joy:~/test.d$ ls -al
total 12
drwxr-xr-x 2 mike mike 4096 Mar 25 17:07 .
drwxr-xr-x 37 mike mike 4096 Mar 25 16:46 ..
-rw-r--r-- 1 mike mike 78 Mar 25 16:47 hello.c
mike@pride-n-joy:~/test.d$ umask
0022
mike@pride-n-joy:~/test.d$ gcc -Wall -o hello hello.c
mike@pride-n-joy:~/test.d$ ls -l
total 12
-rwxr-xr-x 1 mike mike 6696 Mar 25 17:08 hello
-rw-r--r-- 1 mike mike 78 Mar 25 16:47 hello.c
mike@pride-n-joy:~/test.d$ hello
bash: hello: command not found
mike@pride-n-joy:~/test.d$ ./hello
Hello, world!
mike@pride-n-joy:~/test.d$ umask 0137
mike@pride-n-joy:~/test.d$ gcc -Wall -o hello hello.c
mike@pride-n-joy:~/test.d$ ls -l
total 12
-rw-r----- 1 mike mike 6696 Mar 25 17:09 hello
-rw-r--r-- 1 mike mike 78 Mar 25 16:47 hello.c
mike@pride-n-joy:~/test.d$ hello
bash: hello: command not found
mike@pride-n-joy:~/test.d$ ./hello
bash: ./hello: Permission denied
mike@pride-n-joy:~/test.d$ ls -l
total 12
-rw-r----- 1 mike mike 6696 Mar 25 17:09 hello
-rw-r--r-- 1 mike mike 78 Mar 25 16:47 hello.c
mike@pride-n-joy:~/test.d$ chmod 0750 hello
mike@pride-n-joy:~/test.d$ ls -l
total 12
-rwxr-x--- 1 mike mike 6696 Mar 25 17:09 hello
-rw-r--r-- 1 mike mike 78 Mar 25 16:47 hello.c
mike@pride-n-joy:~/test.d$ ./hello
Hello, world!
mike@pride-n-joy:~/test.d$ umask 022
mike@pride-n-joy:~/test.d$ umask
0022
mike@pride-n-joy:~/test.d$
Mike
On Fri, Mar 25, 2016 at 8:53 AM, Dieter Wirz <didi.w...@gmail.com
<mailto:didi.w...@gmail.com>> wrote:
On Fri, Mar 25, 2016 at 3:57 PM, Graham Haddock
<gra...@flexradio.com <mailto:gra...@flexradio.com>> wrote:
> Yes.
> sudo chmod 755 myprogram
> or
> sudo chmod 755 myprogram.o
>
Graham, please do not tell fairy tails on this list!
$ echo '#include <stdio.h>' > hello.c
$ echo 'int main (void) { printf ("Hello, world!\n"); return 0;
}' >> hello.c
$ cat hello.c
#include <stdio.h>
int main (void) { printf ("Hello, world!\n"); return 0; }
$ gcc -Wall -o hello hello.c
$ ./hello
Hello, world!
$ ls -l
total 12
-rwxrwxr-x 1 dw dw 7332 Mar 25 16:32 hello
-rw-rw-r-- 1 dw dw 80 Mar 25 16:31 hello.c
$
No chmod needed, no myprogram.o there, why the sudo????
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