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Showing posts with label with explanation. Show all posts
Showing posts with label with explanation. Show all posts
Friday, July 25, 2014
/*C program that creates a child process to read commands from the standard input and execute them.You can assume that no arguments will be passed to the commands to be executed*/
#include<stdio.h>
#include<unistd.h>
int main()
{
char i[10];
int n;
//int status;
while(1)
{
printf("Enter your command\n");
get(i);
n=fork()
if(n==0)
{ /*it's for executes in new process execl("/bin/sh/","sh","-c",i,null)
and add library unisd.h*/
execl("/bin/sh/","sh","-c",i,null);
exit(0);
}
else if(n>0)
{ /*sometime wait() is not working then you change wait function to
this following part:
while(waitpid(n,status,0)<0)
{
break;
}
*/
wait();
}
else
{
printf("error\n");
}
}
return(0);
}
#include<stdio.h>
#include<unistd.h>
int main()
{
char i[10];
int n;
//int status;
while(1)
{
printf("Enter your command\n");
get(i);
n=fork()
if(n==0)
{ /*it's for executes in new process execl("/bin/sh/","sh","-c",i,null)
and add library unisd.h*/
execl("/bin/sh/","sh","-c",i,null);
exit(0);
}
else if(n>0)
{ /*sometime wait() is not working then you change wait function to
this following part:
while(waitpid(n,status,0)<0)
{
break;
}
*/
wait();
}
else
{
printf("error\n");
}
}
return(0);
}
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