i mean why both the if else statements are working by using fork ? On Fri, Jun 3, 2011 at 10:20 AM, Naveen Kumar <[email protected]>wrote:
> Process don't share address space when forked. > > > > On Fri, Jun 3, 2011 at 10:40 PM, nitish goyal <[email protected]>wrote: > >> @ Lalit >> You are right. >> >> that's why i am saying how i can use semaphores in the above example >> >> >> On Fri, Jun 3, 2011 at 10:37 PM, LALIT SHARMA <[email protected]>wrote: >> >>> While using fork(), child shares parent address space , >>> >>> Correct me If I am wrong .. >>> >>> On Fri, Jun 3, 2011 at 10:28 PM, nitish goyal <[email protected]> >>> wrote: >>> > Hi all, >>> > >>> > I am stuck with this code..Can anyone tell me how to implement >>> semaphores in >>> > fork system call >>> > Code: >>> > >>> > #include<stdio.h> >>> > >>> > int signal(int *n); >>> > int wait(int *n); >>> > >>> > >>> > int main() >>> > { >>> > int n; >>> > n=0; >>> > if(fork()) >>> > { >>> > printf("Hello"); >>> > signal(&n); >>> > } >>> > else >>> > { >>> > wait(&n); >>> > printf("World"); >>> > } >>> > } >>> > int signal(int *n) >>> > { >>> > (*n)++; >>> > } >>> > int wait(int *n) >>> > { >>> > while((*n)<=0); >>> > (*n)--; >>> > } >>> > >>> > Since parent process and child process will be having different address >>> > spaces...so change of n in one address space will not be visible to >>> other.so >>> > please tell me how to make n visible to both the processes >>> > >>> > On Fri, Jun 3, 2011 at 2:45 PM, Subhransu < >>> [email protected]> >>> > wrote: >>> >> >>> >> Here you go in C code >>> >> http://codepad.org/gk6AZj0T >>> >> >>> >> >>> >> int main() >>> >> { >>> >> if(printf("hello")!=0) { >>> >> printf("world"); >>> >> } >>> >> else { >>> >> printf("SCREWED ! ! !"); } >>> >> >>> >> return 0; >>> >> } >>> >> >>> >> >>> >> Subhransu Panigrahi >>> >> >>> >> Mobile: +91-9840931538 >>> >> Email: [email protected] >>> >> >>> >> >>> >> On Fri, Jun 3, 2011 at 1:57 PM, Naveen Kumar < >>> [email protected]> >>> >> wrote: >>> >>> >>> >>> Hi Shachindra, >>> >>> I don't think letters will be jumbled because we a calling one api to >>> >>> output on console & tty's driver takes whole line and output it at >>> once. >>> >>> >>> >>> On Fri, Jun 3, 2011 at 12:40 PM, Vishal Thanki < >>> [email protected]> >>> >>> wrote: >>> >>>> >>> >>>> @sachindra, @naveen, >>> >>>> this was just a plain trick to execute "if" and "else" block. i >>> agree >>> >>>> with your concerns :) >>> >>>> >>> >>>> 2011/6/3 Vιиodh <[email protected]>: >>> >>>> > @vishal: >>> >>>> > can u explain the fork() solution?? >>> >>>> > >>> >>>> > On Fri, Jun 3, 2011 at 12:16 PM, Shachindra A C >>> >>>> > <[email protected]> >>> >>>> > wrote: >>> >>>> >> >>> >>>> >> There can be some synchronisation problems with fork() right? say >>> >>>> >> world >>> >>>> >> might get printed first...or maybe the letters can get jumbled >>> >>>> >> too...We >>> >>>> >> cannot guarantee the order of execution unless we use semaphores. >>> >>>> >> >>> >>>> >> On Fri, Jun 3, 2011 at 12:14 PM, Naveen Kumar >>> >>>> >> <[email protected]> >>> >>>> >> wrote: >>> >>>> >>> >>> >>>> >>> oh yes, >>> >>>> >>> gud one >>> >>>> >>> >>> >>>> >>> On Fri, Jun 3, 2011 at 12:12 PM, Vishal Thanki >>> >>>> >>> <[email protected]> >>> >>>> >>> wrote: >>> >>>> >>>> >>> >>>> >>>> vishal@ubuntu:~/progs/c\ 12:11:53 PM >$ cat fork.c >>> >>>> >>>> #include <stdio.h> >>> >>>> >>>> #include <stdlib.h> >>> >>>> >>>> >>> >>>> >>>> int main() >>> >>>> >>>> { >>> >>>> >>>> if (fork()) { >>> >>>> >>>> printf("hello "); >>> >>>> >>>> } else { >>> >>>> >>>> printf("world\n"); >>> >>>> >>>> } >>> >>>> >>>> return 0; >>> >>>> >>>> } >>> >>>> >>>> vishal@ubuntu:~/progs/c\ 12:11:56 PM >$ gcc fork.c >>> >>>> >>>> vishal@ubuntu:~/progs/c\ 12:12:06 PM >$ ./a.out >>> >>>> >>>> hello world >>> >>>> >>>> >>> >>>> >>>> >>> >>>> >>>> On Fri, Jun 3, 2011 at 12:09 PM, Naveen Kumar >>> >>>> >>>> <[email protected]> wrote: >>> >>>> >>>> > Hi Vishal, >>> >>>> >>>> > >>> >>>> >>>> > Can you show us how it be done with fork? >>> >>>> >>>> > >>> >>>> >>>> > On Fri, Jun 3, 2011 at 12:02 PM, Vishal Thanki >>> >>>> >>>> > <[email protected]> >>> >>>> >>>> > wrote: >>> >>>> >>>> >> >>> >>>> >>>> >> can use fork() also.. >>> >>>> >>>> >> >>> >>>> >>>> >> On Fri, Jun 3, 2011 at 11:57 AM, anand karthik >>> >>>> >>>> >> <[email protected]> wrote: >>> >>>> >>>> >> > (!printf("Hello")) >>> >>>> >>>> >> > >>> >>>> >>>> >> > On Jun 3, 2011 11:52 AM, "Arpit Mittal" >>> >>>> >>>> >> > <[email protected]> >>> >>>> >>>> >> > wrote: >>> >>>> >>>> >> >> Please help me in this question. >>> >>>> >>>> >> >> >>> >>>> >>>> >> >> What's the "condition" so that the following code prints >>> both >>> >>>> >>>> >> >> HelloWorld ! >>> >>>> >>>> >> >> >>> >>>> >>>> >> >> if "condition" >>> >>>> >>>> >> >> printf ("Hello"); >>> >>>> >>>> >> >> else >>> >>>> >>>> >> >> printf("World"); >>> >>>> >>>> >> >> >>> >>>> >>>> >> >> >>> >>>> >>>> >> >> >>> >>>> >>>> >> >> >>> >>>> >>>> >> >> -- >>> >>>> >>>> >> >> -Arpit Mittal >>> >>>> >>>> >> >> 6th Semester, >>> >>>> >>>> >> >> Indian Institute of Information Technology,Allahabad >>> >>>> >>>> >> >> Email : [email protected] >>> >>>> >>>> >> >> [email protected] >>> >>>> >>>> >> >> Contact : +91-8853049787 >>> >>>> >>>> >> >> >>> >>>> >>>> >> >> Let every man be respected as an individual and no man >>> >>>> >>>> >> >> idolized. >>> >>>> >>>> >> >> >>> >>>> >>>> >> >> -- >>> >>>> >>>> >> >> You received this message because you are subscribed to >>> the >>> >>>> >>>> >> >> Google >>> >>>> >>>> >> >> Groups >>> >>>> >>>> >> >> "Algorithm Geeks" group. >>> >>>> >>>> >> >> To post to this group, send email to >>> >>>> >>>> >> >> [email protected]. >>> >>>> >>>> >> >> To unsubscribe from this group, send email to >>> >>>> >>>> >> >> [email protected]. >>> >>>> >>>> >> >> For more options, visit this group at >>> >>>> >>>> >> >> http://groups.google.com/group/algogeeks?hl=en. >>> >>>> >>>> >> >> >>> >>>> >>>> >> > >>> >>>> >>>> >> > -- >>> >>>> >>>> >> > You received this message because you are subscribed to >>> the >>> >>>> >>>> >> > Google >>> >>>> >>>> >> > Groups >>> >>>> >>>> >> > "Algorithm Geeks" group. >>> >>>> >>>> >> > To post to this group, send email to >>> >>>> >>>> >> > [email protected]. >>> >>>> >>>> >> > To unsubscribe from this group, send email to >>> >>>> >>>> >> > [email protected]. >>> >>>> >>>> >> > For more options, visit this group at >>> >>>> >>>> >> > http://groups.google.com/group/algogeeks?hl=en. >>> >>>> >>>> >> > >>> >>>> >>>> >> >>> >>>> >>>> >> -- >>> >>>> >>>> >> You received this message because you are subscribed to the >>> >>>> >>>> >> Google >>> >>>> >>>> >> Groups >>> >>>> >>>> >> "Algorithm Geeks" group. >>> >>>> >>>> >> To post to this group, send email to >>> [email protected]. >>> >>>> >>>> >> To unsubscribe from this group, send email to >>> >>>> >>>> >> [email protected]. >>> >>>> >>>> >> For more options, visit this group at >>> >>>> >>>> >> http://groups.google.com/group/algogeeks?hl=en. >>> >>>> >>>> >> >>> >>>> >>>> > >>> >>>> >>>> > >>> >>>> >>>> > >>> >>>> >>>> > -- >>> >>>> >>>> > Cheers >>> >>>> >>>> > Naveen Kumar >>> >>>> >>>> > >>> >>>> >>>> > -- >>> >>>> >>>> > You received this message because you are subscribed to the >>> >>>> >>>> > Google >>> >>>> >>>> > Groups >>> >>>> >>>> > "Algorithm Geeks" group. >>> >>>> >>>> > To post to this group, send email to >>> [email protected]. >>> >>>> >>>> > To unsubscribe from this group, send email to >>> >>>> >>>> > [email protected]. >>> >>>> >>>> > For more options, visit this group at >>> >>>> >>>> > http://groups.google.com/group/algogeeks?hl=en. >>> >>>> >>>> > >>> >>>> >>>> >>> >>>> >>>> -- >>> >>>> >>>> You received this message because you are subscribed to the >>> Google >>> >>>> >>>> Groups "Algorithm Geeks" group. >>> >>>> >>>> To post to this group, send email to >>> [email protected]. >>> >>>> >>>> To unsubscribe from this group, send email to >>> >>>> >>>> [email protected]. >>> >>>> >>>> For more options, visit this group at >>> >>>> >>>> http://groups.google.com/group/algogeeks?hl=en. >>> >>>> >>>> >>> >>>> >>> >>> >>>> >>> >>> >>>> >>> >>> >>>> >>> -- >>> >>>> >>> Cheers >>> >>>> >>> Naveen Kumar >>> >>>> >>> >>> >>>> >>> -- >>> >>>> >>> You received this message because you are subscribed to the >>> Google >>> >>>> >>> Groups >>> >>>> >>> "Algorithm Geeks" group. >>> >>>> >>> To post to this group, send email to [email protected] >>> . >>> >>>> >>> To unsubscribe from this group, send email to >>> >>>> >>> [email protected]. >>> >>>> >>> For more options, visit this group at >>> >>>> >>> http://groups.google.com/group/algogeeks?hl=en. >>> >>>> >> >>> >>>> >> >>> >>>> >> >>> >>>> >> -- >>> >>>> >> Regards, >>> >>>> >> Shachindra A C >>> >>>> >> >>> >>>> >> -- >>> >>>> >> You received this message because you are subscribed to the >>> Google >>> >>>> >> Groups >>> >>>> >> "Algorithm Geeks" group. >>> >>>> >> To post to this group, send email to [email protected]. >>> >>>> >> To unsubscribe from this group, send email to >>> >>>> >> [email protected]. >>> >>>> >> For more options, visit this group at >>> >>>> >> http://groups.google.com/group/algogeeks?hl=en. >>> >>>> > >>> >>>> > >>> >>>> > >>> >>>> > -- >>> >>>> > With regards, >>> >>>> > Vιиodh >>> >>>> > >>> >>>> > -- >>> >>>> > You received this message because you are subscribed to the Google >>> >>>> > Groups >>> >>>> > "Algorithm Geeks" group. >>> >>>> > To post to this group, send email to [email protected]. >>> >>>> > To unsubscribe from this group, send email to >>> >>>> > [email protected]. >>> >>>> > For more options, visit this group at >>> >>>> > http://groups.google.com/group/algogeeks?hl=en. >>> >>>> > >>> >>>> >>> >>>> -- >>> >>>> You received this message because you are subscribed to the Google >>> >>>> Groups "Algorithm Geeks" group. >>> >>>> To post to this group, send email to [email protected]. >>> >>>> To unsubscribe from this group, send email to >>> >>>> [email protected]. >>> >>>> For more options, visit this group at >>> >>>> http://groups.google.com/group/algogeeks?hl=en. >>> >>>> >>> >>> >>> >>> >>> >>> >>> >>> -- >>> >>> Cheers >>> >>> Naveen Kumar >>> >>> >>> >>> -- >>> >>> You received this message because you are subscribed to the Google >>> Groups >>> >>> "Algorithm Geeks" group. >>> >>> To post to this group, send email to [email protected]. >>> >>> To unsubscribe from this group, send email to >>> >>> [email protected]. >>> >>> For more options, visit this group at >>> >>> http://groups.google.com/group/algogeeks?hl=en. >>> >> >>> >> -- >>> >> You received this message because you are subscribed to the Google >>> Groups >>> >> "Algorithm Geeks" group. >>> >> To post to this group, send email to [email protected]. >>> >> To unsubscribe from this group, send email to >>> >> [email protected]. >>> >> For more options, visit this group at >>> >> http://groups.google.com/group/algogeeks?hl=en. >>> > >>> > >>> > >>> > -- >>> > Regards, >>> > Nitish Goyal >>> > Undergraduate Student Of NSIT, >>> > Computer Engineering (B.E.) >>> > Asst. PlaceComm 2011 >>> > contact me:- +91-9999605824 >>> > Reply at :- [email protected] >>> > >>> > -- >>> > You received this message because you are subscribed to the Google >>> Groups >>> > "Algorithm Geeks" group. >>> > To post to this group, send email to [email protected]. >>> > To unsubscribe from this group, send email to >>> > [email protected]. >>> > For more options, visit this group at >>> > http://groups.google.com/group/algogeeks?hl=en. >>> > >>> >>> >>> >>> -- >>> Lalit Kishore Sharma, >>> IIIT Allahabad (Amethi Capmus), >>> 6th Sem. >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Algorithm Geeks" group. >>> To post to this group, send email to [email protected]. >>> To unsubscribe from this group, send email to >>> [email protected]. >>> For more options, visit this group at >>> http://groups.google.com/group/algogeeks?hl=en. >>> >>> >> >> >> -- >> Regards, >> Nitish Goyal >> Undergraduate Student Of NSIT, >> Computer Engineering (B.E.) >> Asst. PlaceComm 2011 >> contact me:- +91-9999605824 >> Reply at :- [email protected] >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Algorithm Geeks" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/algogeeks?hl=en. >> > > > > -- > Cheers > Naveen Kumar > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/algogeeks?hl=en. > -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to [email protected]. 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