Your invoker is the pid in $PPID, and you can run ps in a popen() or something C library equivalent to find out about it. The second parameter is the script. The effect of starting a script with the line:
is that exec() effectively executes a command:
The optional_one_arg is nice with things like sed that need -f to make it work. See man exec or run "truss -fae <some_script>" or the like.
Last edited by Scott; 10-05-2010 at 11:25 AM..
Reason: Code tags, please...
is there a way to find the process id of a process because i have same process invoked several times.
when i need to kill them, i get confused with the id.
Thanks,
sskb
:( (8 Replies)
Hi,
If in a shell script i write a command
ls > bla &
ls
The output is redirected to bla and the next ls starts as first one is going on in background.
I want to find the PID of the first command.
Thanks in advance (2 Replies)
Hi,
I have a .txt file (uniqfields.txt) with 3 fields separated by " | " (pipe symbol). This file contains unique values with respect to all these 3 fields taken together. There are about 40,000 SORTED records (rows) in this file. Sample records are given below.
1TVAO|OVEPT|VO... (2 Replies)
Hello,
Iam running a apache webserver in CentOS recenlty a hacker has attacked my server using RFI attack and did something in my server.. After that everyday at 8Pm my httpd is using about 5000 pid's actually in normal it takes only about 30 - 40 pid's. and also exim uses 2000 pid's totally my... (2 Replies)
Hello.
When I run
sh -c 'yes'and then send SIGTERM to sh's pid, both sh and yes dies.
When I run
sh -c 'yes | sed "s/y/n/"'and then send SIGTERM to sh's pid, sh dies but yes and sed remain running in background with init as the parent.
Why?
I bash man page is stated that when bash... (0 Replies)
Hi
Any idea how to get the process id of the process using the ports
lsof -i :portnumber does not work in my machine. I am on sun Solaris SPARC.
Any suggestion is highly appreciated (1 Reply)
hi all,
I am trying to find the process id of the subsequent process created via fork and exec calls in perl.
For eg:
envVarSetter dataCruncher.exe < input.txt > output.txt
When I fork and exec the above command,
it returns only the pid of envVarSetter and I don't know how to find the... (9 Replies)
Afternoon all, hopefully someone can give me a hand with this (the following may be explained very poorly :rolleyes: )
I know there's a process running on one of our Solaris 10 boxes that runs approximately every 5 minutes. Unfortunately I've no idea, who owns it, what it is called, or how it is... (2 Replies)
Hello,
The scenario is as follows, I have a background process running initially for which i know the PID on machine1. I use ssh from machine 2 to execute a script in machine 1. For some reason the back ground process is terminated. I would like to know which process caused the... (6 Replies)
Hi,
I am trying to find a file that have a different name than it should be processing, the file name is ( Fifa15 )
is there a command to use?
I got that file by
ps -ef | grep fifa15
but how do I know what is running ?
thanks a lot, I am learning unix so sorry if that is a... (2 Replies)
Discussion started by: latinooo
2 Replies
LEARN ABOUT SUNOS
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)