Im using the knoppix version of linux, which is booting straight off the cd, and it shows my c drive (partiton) that has all my programs i have installed in my xp operating system. Im wondering if theres a way i can play my games like lotr return of the king, or jedi academy, in knoppox. it shows... (2 Replies)
Hey folks, i'm a total newbie at linux (only installed it yesterday) so don't be mad at me for querying this. I downloaded firefox, and unpacked the library files and binaries into /usr/lib/firefox. Now, am I correct in thinking that to run it, I need to enter the 'sh /usr/lib/firefox' command into... (4 Replies)
Hello,
I would like to run gedit as root while logged into my regular user account. When I try to launch gedit from the command line as super user, I get this message:
Gtk-WARNING **: cannot open display:
Any suggestions or word arounds? It would make my life a lot simpler to edit files... (8 Replies)
Hi,
I am a beginner in Perl programming. Now i need to call a C program from a perl program ...Can any one please help me and give any details how i can do this.
Thanks and Regards (3 Replies)
Hi,
I'm still new to perl, and I'm trying to figure out how to work with data output from another program. For example, from a command line I can run "foo -xyz" and it will produce the output I am looking for, which is several lines of text that I will then parse and manipulate within the perl... (6 Replies)
Are the programs written on schedulers ,thread library , process management, memory management, et al called systems programs ? How are they different from the programs that implement functions like open() , printf() , scanf() , read() .. they have a prefix sys_open, sys_close, sys_read etc , right... (1 Reply)
I have installed a software called GMT, then writing a script that call the new programs
./example02.sh
but I am getting
./example02.sh: line 20: gmtset: command not found
I have done
./configure
make
make install (0 Replies)
Any idea how I can run a program from a phyton script?
For example, in csh I will do
$tpath/tsimplex base=$fbase data=$fdata restore=$frestore \
nxp=$nx nzp=$nz param=$param intp=$intp nlay=$nlay \
varp=$varp sigma0=$sigma maxiter=$maxiter tol=$tol \
... (2 Replies)
Good morning,
First time poster. be gentle! :)
I do not know coding all that well but I can hack the hell out of example scripts! I just cant wrap my brain around this one.
Im trying to run two grep statements in the first IF statement and doing an AND between them. Something is going... (6 Replies)
Discussion started by: mrplow2k69
6 Replies
LEARN ABOUT NETBSD
eval
exec(1) User Commands exec(1)NAME
exec, eval, source - shell built-in functions to execute other commands
SYNOPSIS
sh
exec [argument...]
eval [argument...]
csh
exec command
eval argument...
source [-h] name
ksh
*exec [arg...]
*eval [arg...]
DESCRIPTION
sh
The exec command specified by the arguments is executed in place of this shell without creating a new process. Input/output arguments may
appear and, if no other arguments are given, cause the shell input/output to be modified.
The arguments to the eval built-in are read as input to the shell and the resulting command(s) executed.
csh
exec executes command in place of the current shell, which terminates.
eval reads its arguments as input to the shell and executes the resulting command(s). This is usually used to execute commands generated as
the result of command or variable substitution.
source reads commands from name. source commands may be nested, but if they are nested too deeply the shell may run out of file descrip-
tors. An error in a sourced file at any level terminates all nested source commands.
-h Place commands from the file name on the history list without executing them.
ksh
With the exec built-in, if arg is given, the command specified by the arguments is executed in place of this shell without creating a new
process. Input/output arguments may appear and affect the current process. If no arguments are given the effect of this command is to mod-
ify file descriptors as prescribed by the input/output redirection list. In this case, any file descriptor numbers greater than 2 that are
opened with this mechanism are closed when invoking another program.
The arguments to eval are read as input to the shell and the resulting command(s) executed.
On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:
1. Variable assignment lists preceding the command remain in effect when the command completes.
2. I/O redirections are processed after variable assignments.
3. Errors cause a script that contains them to abort.
4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari-
able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not
performed.
EXIT STATUS
For ksh:
If command is not found, the exit status is 127. If command is found, but is not an executable utility, the exit status is 126. If a redi-
rection error occurs, the shell exits with a value in the range 1-125. Otherwise, exec returns a zero exit status.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO csh(1), ksh(1), sh(1), attributes(5)SunOS 5.10 17 Jul 2002 exec(1)