embedded linux scp over application won't run

brentw · 09-25-2014, 10:11 PM

Hello,

I have a TI AM3352 processor running embedded linux (angstrom 3.2.0).

I connect over SSH to the device.

I scp my application - I created (a hello world) into /home/root.

I changed the permissions on the file to executable.

When I try to run the application over SSH via ./HelloWorld

I get an error:

-sh: ./HelloWorld: not found

Not sure why I cannot run the application???

Any help would be greatly appreciated.

michaelk · 09-26-2014, 09:25 AM

linux is case sensitive. Have you typed in the correct name?
Have you verified that you are in the same directory as the executable?
Do you see it when you use the ls command?

brentw · 09-26-2014, 09:33 AM

Thanks for the reply.

I have also used Putty to SSH in. I cd to the directory /home/root. I can do a ls -all and see that the file is there and that permission have been changed.

When I type in ./HelloWorld it auto completes so I am using the correct name.

brentw · 09-26-2014, 10:08 AM

This is probably a dumb question, but I take it I should be able to launch my application over SSH?

schneidz · 09-26-2014, 10:14 AM

^ yes. not that we dont beleive you but can you please show us the contents of ls -al. also can you please show us the contents of you hello-world.c file (maybe your printf() is commented out or something ?).

brentw · 09-26-2014, 10:51 AM

No problem, being a newbie, I am sure I am making a lot of dumb mistakes. The ls -all command shows my app, but if I type -l ./HelloWorld it does not exist??

I don't understand? Did the SCP not work?

root@(none):~# -l ./HelloWorld
-sh: -l: not found

root@(none):~# pwd
/home/root

root@(none):~# ls -all
drwxr-xr-x 4 1000 pulse 4096 Jan 1 2000 .
drwxr-xr-x 4 1000 pulse 4096 Aug 27 2014 ..
-rwxrwxrwx 1 root root 4096 Sep 26 2014 HelloWorld

#include <stdio.h>

main()
{
printf("Hello, world!\n");
return 0;
}

schneidz · 09-26-2014, 11:05 AM

it should be ./HelloWorld to run your program.

some more diagnostics:

Code:

uname -a -m -p
file HelloWorld

brentw · 09-26-2014, 11:30 AM

uname -a -m -p filename HelloWorld
BusyBox v1.20.2 (2014-08-29 11:12:39 CDT) multi-call binary.

Usage: uname [-amnrspv]

Print system information

-a Print all
-m The machine (hardware_ type
-n Hostname
-r OS release
-s OS name (default)
-p Processor type
-v OS version

schneidz · 09-26-2014, 11:35 AM

^ please type in

Code:

uname -a -m -p

followed by the enter key.
then type in

Code:

file HelloWorld

followed by enter then copy-pasta the output in your next response.

brentw · 09-26-2014, 11:44 AM

uname -a -m -p
Linux (none) 3.2.0 #5 Wed Sept 10 18:06:00 CDT 2014 armv71 GNU/Linux
root@ (none):~# file HelloWorld
-sh: file: not found

schneidz · 09-26-2014, 12:38 PM

i find it too coincidental that the HelloWorld program is exactly 4096 bytes big... are you sure its not a directory ?

szboardstretcher · 09-26-2014, 12:43 PM

Dude.. you added an -l before the Helloworld program.. -l is not a program.

Perhaps you meant to type 'ls'

Anyway,. what is IN HelloWorld? Is it a C program like the code above? if it is, you have to compile it first. You can't just "run" un-compiled code.

brentw · 09-26-2014, 12:50 PM

Is my SCP not working?

Could it be the permissions on the file system? If so how do I change them?

schneidz · 09-26-2014, 12:53 PM

what happens when you do:

Code:

cat HelloWorld

.
how did you compile it... maybe you compiled it for x86 so therefore it wont run on arm (but i would expect a different error than file not found) ?

brentw · 09-26-2014, 01:03 PM

I have the following defined in my .bashrc file

ARCH=arm
CROSS_COMPILE=arm-linux-gnueabi-
PATH variable to the cross compiler

then I have a very simple make file that uses the cross compiler