05-21-2002
First off, the su command will prompt you interactively for a password, and it expects you to enter it before continuing...
You won't see it, though since you are sending stdout to /dev/null, and it looks like you are trying to send stderr into stdout, although instead of using 2>&1, you are using 2>$1 (which would send stdout into the first argument of your script - I'm assuming it would create a file with that name)
The proper way to do it would be to do:
command >/dev/null 2>&1 &
instead of
command >/dev/null 2>$1 $
But since the su command is interactive, this shouldn't work anyways.
You can try setting up an account with sudo privelages that don't require a password to run a certain command (limit the command set to only that script), but you would need to talk to the admin about that.
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LEARN ABOUT DEBIAN
stdout
FD(4) BSD Kernel Interfaces Manual FD(4)
NAME
fd, stdin, stdout, stderr -- file descriptor files
DESCRIPTION
The files /dev/fd/0 through /dev/fd/# refer to file descriptors which can be accessed through the file system. If the file descriptor is
open and the mode the file is being opened with is a subset of the mode of the existing descriptor, the call:
fd = open("/dev/fd/0", mode);
and the call:
fd = fcntl(0, F_DUPFD, 0);
are equivalent.
Opening the files /dev/stdin, /dev/stdout and /dev/stderr is equivalent to the following calls:
fd = fcntl(STDIN_FILENO, F_DUPFD, 0);
fd = fcntl(STDOUT_FILENO, F_DUPFD, 0);
fd = fcntl(STDERR_FILENO, F_DUPFD, 0);
Flags to the open(2) call other than O_RDONLY, O_WRONLY and O_RDWR are ignored.
IMPLEMENTATION NOTES
By default, /dev/fd is provided by devfs(5), which provides nodes for the first three file descriptors. Some sites may require nodes for
additional file descriptors; these can be made available by mounting fdescfs(5) on /dev/fd.
FILES
/dev/fd/#
/dev/stdin
/dev/stdout
/dev/stderr
SEE ALSO
tty(4), devfs(5), fdescfs(5)
BSD
June 9, 1993 BSD