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Top Forums Programming how to execute multi command??? Post 302096145 by !_30 on Tuesday 14th of November 2006 06:52:21 AM
Old 11-14-2006
aliG4 , what do you really want dude ?

Code:
int main (int argc, char *argv[])

-this are the parameter's of the main function ( here is a function , which return an integer value ).

argc : is the number of argument's passed , beginning with 0.

*argv[0] , *argv[1] .. : the argument's ?

Whtat does this mean ?

Let's say : ./do bla bla

./do is the 0 argument , bla is the first and second bla is the second.

So if you want to have a program do per example . You may want to execute multiple commands , and pass them like argument's.

Let's say , you want do to execute ps comand you may just enter :

Code:
 ./do ps

- if you want do to execute let's say ping command , you can do :

Code:
 ./do ping

suposing , that you have configured in the program ( your C aplication ) to execute argv[1] as a command.

let's say something like system("argv[1]") .. or something like that ?

This is what do you want ? Smilie
 

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time(1) 						      General Commands Manual							   time(1)

Name
       time - time a command

Syntax
       time command
       /bin/time command

Description
       The  command  lets  the specified command execute and then outputs the amount of elapsed real time, the time spent in the operating system,
       and the time spent in execution of the command.	Times are reported in seconds and are written to standard error.

       If you are using any shell except the C shell, you can give the command as shown on the first line of the Syntax section.  If you are using
       the  C shell, you must use the command's full pathname as shown on the second line of the Syntax section.  If you do not use the full path-
       name, will execute its own built-in command that supplies additional information and uses a different output format.

       The command can be used to cause a command to be timed no matter how much CPU time it takes.  For example:
       % /bin/time cp /etc/rc /usr/bill/rc
	       0.1 real 	0.0 user	 0.0 sys
       % /bin/time nroff sample1 > sample1.nroff
	       3.6 real 	2.4 user	 1.2 sys
       This example indicates that the command used negligible amounts of user and system time and had an elapsed time of 1/10 second (0.1).   The
       command used 2.4 seconds of user time and 1.2 seconds of system time, and required 3.6 seconds of elapsed time.

Restrictions
       Times are measured to an accuracy of 1/10 second.  Thus, the sum of the user and system times can be larger than the elapsed time.

See Also
       csh(1)

																	   time(1)
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