Hi. Im working in AIX. Oracle 9.2.
In one of the backup scripts, I see this:
sysback -f'/dev/rmt0' '-T chrp' '-k mp' -w '/tmpback' 'oradata_vg oraindx_vg ora misc_vg'
The line here, as I know, specifies the device name, the temp file, and the volume groups.
My query regards theses two: '-T... (2 Replies)
Hi, experts.
Whould anybody clear explay me difference and usage of these 3 commands (particulary in bash) :
exec
eval
source
I've tryed to read the manual pages but did not get much.
Also could not get something useful from Google search - just so much and so not exactly, that is... (3 Replies)
Hi,
I am trying to find the max memory utilization of a binary file using chatr command.
i gave chatr <file name>. But no where i could see the max memory usage of the file. How do you i check the memory usage of this binary file.
Upto my knowledge it should be 1.75GB in HP-UX. But the does... (1 Reply)
how does exec() do it? on successful call of exec() family of functions, they never return...
how to i emulate that.
assume the standard example,
execl("/bin/ls","ls",NULL);
now this would never return.
i m trying to emulate exec()'s never to return feature...
#include<unistd.h>... (4 Replies)
Hello,
can someone please explain me what the following commands do.. i know the output but i would like to understand the break down of what they do step by step.
1) sed -n "/ $(date +\%R -d "-1 min")/,$"p req.txt| wc -l
2)
awk '/19:00/,/22:00/' app.log |grep "mytesturl"|grep... (2 Replies)
root@desktop:~# last reboot | head -1
reboot system boot 2.6.31-17-generi Tue Jan 26 12:05 - 13:52 (01:46)
What does the last two fields(12:05 - 13:52 (01:46)) of the output mean? (2 Replies)
I have taken putty session of a server from two separate machines namely HOST1(3 sessions) and HOST2(1 Session) .
However w command says there are 5 users
Confused over the output any clue will be appreciated.
# w
09:29:36 up 34 days, 15:48, 5 users, load average: 0.62, 4.33, 8.16
USER ... (3 Replies)
Hi Gurus,
I am new for Unix scripting. below command in one existing script. I am not able to fully understand. please help
in below command, I am not able to understand what's {P=1} do
thanks in advance
awk 'NF==1{$3=$1;$1=L}P&&NF>=3{print $1,$3;L=$1}/^___/{P=1}' FILE (3 Replies)
Hello.
From a script, a command for a test is use :
find /home/user_install -maxdepth 1 -type f -newer /tmp/000_skel_file_deb ! -newer /tmp/000_skel_file_end -name '.bashrc' -o -name '.profile' -o -name '.gtkrc-2.0' -o -name '.i18n' -o -name '.inputrc'
Tha command... (3 Replies)
Discussion started by: jcdole
3 Replies
LEARN ABOUT SUNOS
exec
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)