Arjun Suresh (talk | contribs) (Created page with "<syntaxhighlight lang="C" name="banker_algorithm"> #include <unistd.h> #include <stdio.h> #include <sys/types.h> #include <signal.h> #include <sys/wait.h> int main() { uns...") |
Arjun Suresh (talk | contribs) |
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| − | <syntaxhighlight lang="C" name=" | + | The program should wait for a name to be entered by the user and then display "Thank you". If no input is given for 10s, the program should exit with output "Failed". |
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| + | <syntaxhighlight lang="C" name="fork"> | ||
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if(pid == 0)//pid = 0 for child only | if(pid == 0)//pid = 0 for child only | ||
{ | { | ||
| + | printf("Enter name: "); | ||
fgets(name, 100, stdin); | fgets(name, 100, stdin); | ||
printf("Thank you\n"); | printf("Thank you\n"); | ||
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kill(pid, 9);// kills the child | kill(pid, 9);// kills the child | ||
| − | + | if(!printf("Failed\n")) | |
| − | + | printf("l = %u",l);// for ensuring the code remains after optimization | |
} | } | ||
The program should wait for a name to be entered by the user and then display "Thank you". If no input is given for 10s, the program should exit with output "Failed".
<syntaxhighlight lang="C" name="fork">
int main() { unsigned i, l = 0, j; int status; char name[100]; pid_t pid; pid = fork();//child starts if(pid == 0)//pid = 0 for child only {
GATECSE printf("Enter name: ");
fgets(name, 100, stdin); printf("Thank you\n"); kill(getppid(), 9);//kills the parent return;// child finishes here } for(i = 0; i < 500000; i++) for(j = 0; j < 10000; j++) l++; // l is used so that compiler just won't remove the loop for optimization if(waitpid(pid, &status, WNOHANG) == 0)//Child still running { kill(pid, 9);// kills the child
if(!printf("Failed\n")) printf("l = %u",l);// for ensuring the code remains after optimization }
}
</syntaxhighlight>
<syntaxhighlight lang="C" name="banker_algorithm">
int main() { unsigned i, l = 0, j; int status; char name[100]; pid_t pid; pid = fork();//child starts if(pid == 0)//pid = 0 for child only { fgets(name, 100, stdin); printf("Thank you\n"); kill(getppid(), 9);//kills the parent return;// child finishes here } for(i = 0; i < 500000; i++) for(j = 0; j < 10000; j++) l++; // l is used so that compiler just won't remove the loop for optimization if(waitpid(pid, &status, WNOHANG) == 0)//Child still running { kill(pid, 9);// kills the child
if(! printf("Failed\n")) printf("l = %u",l);// for ensuring the code remains after optimization }
}
</syntaxhighlight>